When cooling the inside (X1) in the axial direction of at least one of a stator coil end portion (12) and a phase ring (6), the relative ratio of the outside diameter (D1) of an axial flow fan (23) to the outside diameter (D2) of an axial outer end portion (22A) of a holding ring is increased, and when the outside (X2) in the axial direction of at least one of the stator coil end portion (12) and the phase ring (6) is cooled, the relative ratio of the outside diameter (D1) of the axial flow fan (23) to the outside diameter (D2) of the axial outer end portion (22A) of the holding ring is reduced.
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
2.
WEDGE INSERTION MACHINE FOR ROTOR AND WEDGE INSERTION METHOD FOR ROTOR
This wedge insertion machine (10) comprises: a pressing device (11) that is disposed outside of a slot (21) in a radial direction (X), the pressing device (11) having a pressing part (11A) that is capable of moving in an axial direction (Z) of a rotor (100); an insertion jig (14) that is disposed outside of the slot (21) in the radial direction (X), the insertion jig (14) being moved in the axial direction (Z) by the pressing device (11), pressing a wedge (7) in the axial direction (Z), and being fitted inside the slot (21); a pressure sensor (13) that measures the pressing force with which the pressing part (11A) presses the wedge (7) in the axial direction (Z) via the insertion jig (14); and a reaction force receiver (50) that receives the reaction force of the pressing device (11) pressing the wedge (7) via the insertion jig (14).
H02K 15/09 - Forming windings by laying conductors into or around core parts by laying conductors into slotted rotors
3.
POWER GENERATOR POSITION CORRECTION DEVICE, POWER GENERATOR POSITION CORRECTION SYSTEM, POWER GENERATOR POSITION CORRECTION METHOD, AND POWER GENERATOR INSPECTION METHOD
A position correction device (100) provided to a power generator (1) that is raised and lowered along the vertical direction between a first position and a second position, which differ from each other in the vertical direction, by a lifting device (10), said position correction device (100) comprising: a detection device (30) that detects a horizontal position deviation amount between the power generator (1) at the first position and the power generator (1) at the second position, in a first plane (M) which is in the horizontal direction perpendicular to the vertical direction; and an adjustment device (50) that is disposed below the power generator (1) in the vertical direction independently of the ceiling and side wall of a building, that can move the power generator (1) only in a first axial direction and a second axial direction which are orthogonal to each other in the first plane (M), and that adjusts the horizontal position deviation amount.
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
4.
SHORT CIRCUIT DETECTION DEVICE FOR ROTATING ELECTRICAL MACHINE
A short circuit detection device for a rotating electrical machine includes: a signal processing device including a signal acquisition unit, a signal decomposing unit, a specific frequency component reducing unit, a signal conversion unit, and a short circuit detection unit; and a magnetic detector placed inside a stator, and detects short circuit of a field winding. The signal decomposing unit decomposes a voltage signal from the signal acquisition unit into a plurality of frequency components having different orders. The specific frequency component reducing unit reduces frequency components for odd-number orders and frequency components for even-number orders higher than a threshold less than a fundamental order of a slot harmonic. The signal conversion unit performs conversion to a voltage signal. The short circuit detection unit generates a difference waveform between voltage signals corresponding to magnetic poles, and detects short circuit of the field winding and a short circuit position thereof.
An inspection device (50) for a rotary electric machine is equipped with a rotor (1) provided around a shaft (3) and rotor retaining rings (2) anchored to both end sides of the rotor (1) in the axial direction, and comprises: base units (10) which are mounted to the respective rotor retaining rings (2) by way of first fasteners (11); a guide wire (13) stretched between the base units; an inspection robot (16) which has both end portions thereof controlled by the guide wire (13); a driving wire (17) which is attached to the inspection robot (16) and which moves the inspection robot (16) in the axial direction; and second fasteners (19) which are provided to the respective base units (10) and which anchor the base units (10) to the shaft (3) at locations on the axially outer sides of the first fasteners (11).
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
6.
PHASE RING SUPPORT STRUCTURE AND ROTATING ELECTRIC MACHINE
A metal support structural body is provided on the radially outer side of a phase ring for connecting a rotating electric machine armature winding at a stator end. An insulator ensuring an insulation distance to the ground is interposed between the phase ring and the metal support structural body. Thus, long-term reliability improves as compared to a conventional insulation-to-ground structure. Since the insulation distance to the ground is ensured by the insulator, the phase ring and the metal support structural body are configured with an insulation thickness smaller than needed for insulation to the ground, thereby improving cooling performance for the phase ring and the metal support structural body. Occurrence of induced current in the metal support structural body is suppressed, thus allowing application of a simple fastening structure such as metal bolts to a stator frame.
H02K 3/50 - Fastening of winding heads, equalising connectors, or connections thereto
H02K 3/34 - Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
7.
INSPECTION DEVICE FOR ROTARY ELECTRIC MACHINE, INSPECTION SYSTEM FOR ROTARY ELECTRIC MACHINE, INSPECTION METHOD FOR ROTARY ELECTRIC MACHINE, AND ROTARY ELECTRIC MACHINE TO BE INSPECTED USING INSPECTION DEVICE
An inspection device inspects an inspection target part by being inserted into a gap between an inner circumferential surface of a stator and an outer circumferential surface of a rotor of a rotary electric machine. The inspection device includes: a traveling body which is attached to a base frame and moves the base frame in an axial direction in the gap; a probe which inspects the inspection target part; a radial-movement portion which moves the probe in a radial direction perpendicular to the axial direction and a circumferential direction; and a circumferential-movement portion which moves the probe in the circumferential direction in the base frame.
A rotary electric machine examination device of the present disclosure includes: first and second base units attached to both ends of rotor retaining rings fixed to both axial end sides of a rotor; a guide wire stretched between the first and second base units; an inspection unit which moves on the stator and includes a housing having both side surfaces restricted by the guide wire, and a sensor unit; and a driving rope which drives the inspection unit in the axial direction. The guide wire is stretched such that the distance between the guide wire and the rotation axis at the positions of the first and second base units is greater than the distance between the guide wire and the rotation axis at the position of the inspection unit.
A bipolar rotor of a rotating electric machine is such that flexural rigidity asymmetry of a rotor main portion is adjusted using a cross slot provided in a rotor core, and flexural rigidity asymmetry of a rotor stepped portion is adjusted using a cutout groove provided in the rotor stepped portion, whereby optimization is achieved by combining the flexural rigidity asymmetry of the rotor main portion and the flexural rigidity asymmetry of the rotor stepped portion, and vibration in each double frequency vibration flexural vibration mode is restricted over a whole region of driving rotational speed.
A magnetically-attracting crawler moving device has a magnetically-attracting traveling mechanism including a source device of magnetic force provided with a pair of magnets and a yoke disposed on the backside of the magnets or behind the magnet; a crawler belt rotationally running with drive portion thereof in non-contact with the source device of magnetic force; and a guide in contact with the pair of magnets and the yoke and on which surface the crawler belt slides, wherein the drive portion of the crawler belt protrudes from the source device of magnetic force and the guide to travel.
Oil outlets penetrating from an inner circumferential surface to an outer circumferential surface of a carrier ring are located in at least two of: a range that is on a forward side in a rotation direction of a rotary shaft from an upstream pivot and on a backward side in the rotation direction of the rotary shaft from a downstream pivot, a range that is from 180 degrees to 360 degrees and is from a position at a vertical height of the downstream pivot to a position at a topmost vertical height of the rotary shaft, or a range that is from 0 degrees to 180 degrees and is from a position at a vertical height of the upstream pivot to the position at the topmost vertical height of the rotary shaft.
An installation method for a rotating electrical machine includes a placement step of placing a leg portion, which has a first surface formed with a first groove portion, on a support member, which has a second surface formed with a second groove portion, a length adjustment step of shortening at least either of a pair of projecting portions of a key member, which includes a narrow portion and a wide portion with a pair of projecting portions projecting to both sides in a width direction from the narrow portion, to be fitted into a wide groove portion having a larger groove width of the first groove portion or the second groove portion, after the placement step, and a fitting step of fitting the key member into a key groove formed by the first groove portion and the second groove portion, after the length adjustment step.
A short-circuit detection device for a rotating electric machine sets an order lower than a fundamental order of a slot harmonic wave as a threshold value, and reduces, among the plurality of frequency components, even-order frequency components having orders higher than the threshold value and odd-order frequency components, converts a plurality of frequency components output from the specific frequency component reduction unit into a voltage signal, generates a difference waveform of voltage signals respectively corresponding to adjacent magnetic poles, detects a short-circuit of a field winding based on a shape of the difference waveform, and estimates a short-circuit position of the field winding, and determines an estimation accuracy of the short-circuit position of the field winding based on a degree of symmetry of a waveform of a maximum wave with respect to a peak angle of the difference waveform serving as a center.
A journal bearing includes an oil supply nozzle, having an oil distribution part which extends in an axial direction of the rotation shaft and supplies lubricating oil, and a pad, provided at the rear side of the oil supply nozzle, in a rotational direction of the rotation shaft and supporting the rotation shaft rotatably. The inner periphery face of the pad, which opposes the outer periphery face of the rotation shaft, has an opening side face, in which the radial direction spacing between the inner periphery face and the outer periphery face of the rotation shaft becomes smaller, from the front end face of the pad, located at the front side in the rotational direction of the rotation shaft, toward the rear side in the rotational direction, and between the oil distribution part and the pad, the journal bearing has a bubble discharge path which discharges air bubbles.
This gas dryer includes: a first drying tower having a first desiccant provided therein; and a second drying tower having a second desiccant provided therein. Either the first drying tower or the second drying tower is switched to a drying circuit side for drying hydrogen gas of an electric device, and another of the first drying tower or the second drying tower is switched to a reactivation circuit side for reactivating the first desiccant or the second desiccant provided therein. The gas dryer includes a cooler which is provided on the reactivation circuit side and which, with only supply of compressed air, generates air having such a temperature that can condense moisture in the gas on the reactivation circuit side.
H02K 9/10 - Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
H02K 9/26 - Structural association of machines with devices for cleaning or drying cooling medium, e.g. with filters
A repair method of a stator iron core which has a slot for accommodating a stator coil, and is formed by laminating silicon steel sheets. The method is implemented by moving a part of the silicon steel sheets which form the stator iron core while holding the stator coil in the slot to form a gap between the laminated silicon steel sheets of the stator iron core in the existence of a damaged part, and adding an insulation to the damaged part of the silicon steel sheet from the gap formed between the laminated silicon steel sheets to repair the damaged part of the silicon steel sheet.
The present disclosure includes: a holding ring fitted to a rotor and holding a rotor coil of the rotor; and an interpolar jumper wire electrically connecting field poles of the rotor to each other, the interpolar jumper wire being composed of a flexible lead formed by stacking electrically conductive metal plates and a metal wire connected to the flexible lead. In a case where the flexible lead is divided, in terms of positions in a radial direction of the metal plates thereof, at half the number of all the stacked metal plates, an average value of plate thicknesses of metal plates that are disposed on an inner layer side is set to be smaller than an average value of plate thicknesses of metal plates that are disposed on an outer layer side.
Provided is an inspection device for a rotating electric machine, the inspection device including a photographing device, a drive mechanism, a display, and a controller. The photographing device photographs a pattern formed on a surface of a wedge constituting part of an armature. The drive mechanism moves the photographing device with respect to a stator functioning as the armature. The controller detects strain of the wedge by comparing image data of the pattern photographed by the photographing device with reference data of the pattern. In this manner, the inspection device for a rotating electric machine can easily detect the strain of the wedge. Further, the controller estimates loosening of the wedge based on the strain of the wedge, and informs an operator of the rotating electric machine through the display that the loosening of the wedge has occurred.
H02K 11/20 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
G01L 1/24 - Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis
An inspection device includes: a base; a linear motion mechanism which performs linear motion; a link mechanism which has a driven link connected to the base, and which extends/contracts by the linear motion performed by the linear motion mechanism; a connection mechanism for connecting between a driving link of the link mechanism and the linear motion mechanism; and a sensor. The connection mechanism has a link connection portion connected to the link mechanism, and a ball nut that moves in conjunction with the linear motion performed by the linear motion mechanism. When a force higher than or equal to a predetermined force is applied to the link mechanism, the link connection portion is separated from the ball nut so as to contract the link mechanism.
G01M 99/00 - Subject matter not provided for in other groups of this subclass
H02K 11/20 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
20.
Short circuit detection device, and short circuit detection method for rotating electric machine
Provided are a short circuit state analyzer to compare difference value when the AC excitation current is applied at a first frequency with a threshold value, to estimate a short circuit resistance from the difference value based on data indicating a relationship between the short circuit resistance and the difference value at the first frequency when the difference value is smaller than the threshold value, to cause an excitation power supply to apply the AC excitation current to the field windings at a second frequency lower than the first frequency when the difference value is equal to or greater than the threshold value, and to estimate the short circuit resistance from a difference value obtained by the AC excitation current at the second frequency based on data indicating a relationship between the short circuit resistance and the difference value at the second frequency.
A short-circuit generator is a generator in which stator slots provided with windings of a stator placed therein each have a depth in a radial direction perpendicular to a rotor central axis whose ratio divided by a width of the stator slot in a direction perpendicular both to the radial direction and a direction of the rotor central axis, is less than three. A rotor includes: a field winding placed in each of rotor slots; a metallic damper bar placed in each of the rotor slots on an outer periphery side of the field winding; and a metallic wedge placed in each of the rotor slots on an outer periphery side of the damper bar and connected to the damper bar. A damper-bar height that is a height of the damper bar is less than a wedge height that is a height of the wedge in the radial direction.
H02K 3/16 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots for auxiliary purposes, e.g. damping or commutating
22.
Device for inspecting wedge looseness of rotary electric machine, system for inspecting wedge looseness of rotary electric machine, and method for inspecting wedge looseness of rotary electric machine
This wedge looseness inspector for a rotary electric machine includes: an inspector including a wedge striker having a tap hammer for striking a wedge, and a wedge vibration detector for detecting vibration of the wedge; and attraction portions connected to the inspector via connection members and being attractable to an outer circumferential surface of a stepped-down portion, wherein the attraction portions have, on an inner side in the axial direction, first attachments that allow adjustment of the attached position in the axial direction of the attraction portions or replacement thereof.
This device includes: an input unit for receiving a shape of an inspection target surface of a wedge exposed from a slot with no force applied to the wedge; a relation storage unit which acquires and stores, as a deformation reaction force relation, a relation between a reaction force of a spring at the inspection target surface of the wedge and deformation distribution from the shape of the inspection target surface of the wedge inputted to the input unit; a measurement unit for measuring measurement deformation distribution of the inspection target surface of the wedge; an estimation unit for estimating an estimation reaction force from the measurement deformation distribution and the deformation reaction force relation; and a judgement unit for judging proper/fault about looseness of the wedge from the estimation reaction force.
G01B 21/32 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
Provided is a journal bearing, including: a carrier ring; a pad; and an oil supply nozzle configured to supply oil to a portion between a rotation shaft and the pad. The pad includes: an inner peripheral surface opposed to the rotation shaft; and an upstream end surface located on an upstream side of the inner peripheral surface in a rotating direction of the rotation shaft. The inner peripheral surface includes a partially cylindrical surface, and a recessed portion, which is arranged on an upstream side of the partially cylindrical surface, and forms an opening space for storing the oil. The opening space includes: an oil inlet port opened at the upstream end surface; and an oil outlet port opened toward the rotation shaft. The pad includes a backflow preventing portion configured to prevent the oil in the opening space from flowing back to the oil inlet port.
An end housing portion of a rotating electric machine is partitioned by a partition plate into a first space on the side where a cooling cooler is present and a second space on the side where a coil end portion is present. The partition plate has, at a radially outer end, an intake port that opens in the circumferential direction. A shield plate which is a magnetically high-conductive metal plate is provided so as to be connected to the radially inner side from the intake port of the partition plate and arranged along the circumferential direction of the frame. A ventilation path D is formed between the shield plate and the frame so as to communicate with the intake port.
H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
H02K 3/42 - Means for preventing or reducing eddy-current losses in the winding heads, e.g. by shielding
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
H02K 9/10 - Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
26.
Inspection device for rotating electric machine and method of inspecting rotating electric machine
Provided is an inspection device for a rotating electric machine, including: a storage unit configured to store tendency information indicating a relationship among a position of damage that occurs in an inspection target portion being a range to be inspected of a rotor included in a rotating electric machine, a scale of the damage, and an amount of deformation that occurs in a measurement target portion set on an outer surface of the rotor; a measurement unit configured to measure the amount of deformation that has occurred in the measurement target portion; and a damage estimating unit configured to estimate the position and the scale of the damage that has occurred in the measurement target portion based on the tendency information and the amount of deformation in the measurement target portion, which has been measured by the measurement unit.
Stacked core sheets forming a stacked core of a rotating electric machine have tooth portions on the inner circumferential side. Axial-direction holes penetrating the stacked core in the axial direction are provided near the tooth bases and near the outer circumferential surface. Resin is injected through tooth base neighbor holes near the tooth bases and core outer circumferential holes near the outer circumferential surface of the stacked core, among the axial-direction holes in the rotating electric machine. Thus, the resin fills gaps near the tooth bases and near the outer circumferential surface of the stacked core, so that the stacked core sheets are bonded to each other, thus obtaining a rotating electric machine having such a stacked core.
H02K 1/04 - DYNAMO-ELECTRIC MACHINES - Details of the magnetic circuit characterised by the material used for insulating the magnetic circuit or parts thereof
H02K 15/12 - Impregnating, heating or drying of windings, stators, rotors or machines
28.
Stator coil and stator comprising said stator coil, rotating electrical machine, and manufacturing method for stator coil
An object is to provide a stator coil having a corner portion with less start points for partial discharge while reducing loss. A stator coil having a conductor bar includes, at a corner portion thereof: a first insulating layer covering an outer periphery of the conductor bar; an electric conductor having one end electrically connected to the conductor bar on a distal end side of the corner portion, and another end placed on an outer surface of the first insulating layer; a first conductive layer covering an outer periphery of the first insulating layer and the electric conductor located on the outer surface of the first insulating layer; a second insulating layer covering an outer periphery of the first conductive layer; and a second conductive layer covering an outer periphery of the second insulating layer.
H02K 3/40 - Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges
H02K 15/10 - Applying solid insulation to windings, stators or rotors
29.
Rotor of rotating electrical machine and repairing method therefor
In a rotor of a rotating electric machine, a slot includes a winding insertion portion and a widened portion. A width dimension of the widened portion is larger than a width dimension of the winding insertion portion. A pair of step portions are formed on both sides of an end portion of the winding insertion portion on the widened portion side. A wedge member is spaced from and opposed to the pair of step portions. An insulation includes: an insulation main body arranged between a rotor winding and a damper bar; and an extended portion, which is arranged in at least a part of a space between the wedge member and the pair of step portions, and is configured to suppress movement of the damper bar in a circumferential direction of a rotor core.
H02K 15/00 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
H02K 3/16 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots for auxiliary purposes, e.g. damping or commutating
H02K 3/34 - Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
30.
Short circuit detection device and short circuit detection method
Provided is a short-circuit detection device including: a signal acquisition unit configured to acquire, from a magnetic flux detector configured to detect a magnetic flux generated in an air gap between a rotor and a stator of a rotating electric machine, a detection signal corresponding to the magnetic flux; a signal processing unit configured to subject the detection signal acquired by the signal acquisition unit to filtering of removing at least one component of odd-order components included in the detection signal, to thereby generate a filtered signal being the detection signal subjected to the filtering; and a short-circuit detection unit configured to detect a short circuit of a field winding through use of the filtered signal generated by the signal processing unit.
An image processing method for measuring displacement of an object comprising is provided. The method includes acquiring first sequential images and second sequential images, wherein two adjacent images of the first sequential images include first overlap portions, wherein two adjacent images of the second sequential images include second overlap portions, wherein the first sequential images correspond to a first three dimensional (3D) surface on the object at a first state and the second sequential images correspond to a second 3D surface on the object at a second state. The method further includes deblurring the first sequential and second sequential images to obtain sharp focal plane images based on a blind deconvolution method, stitching the sharpened first sequential images and the sharpened second sequential images into a first sharp 3D image and a second sharp 3D image based on camera pose estimations by solving a perspective-n-point (PnP) problem using a refined robust weighted Levenberg Marquardt (RRWLM) algorithm, respectively. The method further comprises forming a first two-dimensional (2D) image and a second 2D image by unfolding, respectively, the first sharp 3D image and the second sharp 3D, and generating a displacement(strain) map image from the first 2D and second 2D images by performing a two-dimensional digital image correction (DIC) method.
Provided an inspection method for a rotating electric machine, including: a first step of acquiring a first image by imaging a pattern formed on an outer peripheral surface of a retaining ring over an entire circumference of the retaining ring with use of an image pickup element mounted to a non-rotating portion of the rotating electric machine under a state in which the retaining ring is rotated; a second step of acquiring a second image by imaging the pattern over the entire circumference of the retaining ring with use of the image pickup element under the state in which the retaining ring is rotated, the second step being executed after the first step with an operation of the rotating electric machine interposed; and a third step of acquiring a distortion distribution of the retaining ring based on the first image and the second image.
The present invention provides a power-system stabilization system and a power-system stabilization method, which fundamentally solve the problems of insufficiency and fluctuation in the voltage maintenance capacity and the frequency maintenance capacity. A power-system stabilization system of the present invention comprises a synchronous machine to be field-regulated disposed in an electric power station connected to a power system, a magnetic field regulator for controlling the synchronous machine, and a compensation circuit for correcting a control constant of the magnetic field regulator in accordance with a power-system stability maintaining index that is an index reflecting a renewable energy amount in the power system.
The present invention provides a magnetic field control device and a magnetic field control method for a synchronous machine, which can fundamentally cope with the problem of the lack and fluctuation in the voltage maintaining ability from a point of view of a power generation of a power system. A magnetic field control device of the present invention is a device for a synchronous machine that controls a magnetic field of the synchronous machine connected to a power system. The magnetic field control device comprises a magnetic field control system operating electric current flowing through a magnetic field coil of the synchronous machine; a regulator of the magnetic field control system; and a compensation circuit variably regulating a control constant of the magnetic field control system according to a magnitude of magnetic field current or an equivalent of the magnetic field current.
H02J 3/16 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
H02J 3/18 - Arrangements for adjusting, eliminating or compensating reactive power in networks
35.
Pulling detection device and moving body system comprising same
A pulling detection device includes: a base in which, on a foundation portion, a first wall portion, a projection, and a second wall portion are provided; a movable rod including a switch operation body and a pulling rod, the switch operation body having a first wall portion opposed surface, a projection opposed surface, and a second wall portion opposed surface, the pulling rod extending from the second wall portion opposed surface, while movement of the movable rod toward one side is restricted by contact between the first wall portion and the first wall portion opposed surface and movement of the movable rod toward another side is restricted by contact between the projection and the projection opposed surface; an elastic body provided between the second wall portion opposed surface and the second wall portion; a first switch which operates by contact/separation; and a second switch which operates by contact/separation.
G01L 1/04 - Measuring force or stress, in general by measuring elastic deformation of gauges, e.g. of springs
G01L 5/101 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means using sensors inserted into the flexible member
G01L 5/103 - Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using electrical means using sensors fixed at one end of the flexible member
36.
Rotating electric machine test method, rotating electric machine test device, and rotating electric machine
A rotating electric machine includes a stator and a rotor. An imaging device images a test target portion which is a part of the rotor, to generate image data of the test target portion, and transmits the generated image data to an image processing device. The image processing device generates strain change information representing change in the strain distribution in the test target portion by digital image correlation on the basis of the test image data generated by the imaging device. The state of the rotor is tested using the generated strain change information.
H02K 1/22 - Rotating parts of the magnetic circuit
G01L 1/24 - Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis
G01M 5/00 - Investigating the elasticity of structures, e.g. deflection of bridges or aircraft wings
G01B 5/30 - Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
G01B 11/16 - Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
37.
Method for assessing remaining life of rotating electrical machine and device for assessing remaining life of rotating electrical machine
A device for assessing remaining life of a rotating electrical machine includes: a data acquisition unit configured to acquire actual running performance data and electrical data about the rotating electrical machine to be assessed; an index value calculation unit configured to calculate a first index value to a third index value based on the acquired data, and to calculate, as a fourth index value, an estimation value of a residual withstand voltage value of the rotating electrical machine by performing analysis that uses an MT method on each piece of the electrical data; and an insulation deterioration estimation unit configured to assess the remaining life of the rotating electrical machine by estimating the remaining life of the rotating electrical machine with use of four index values from the first index value to the fourth index value.
Provided is a stator coil, including: a coil conductor; a first insulating layer in which a first mica tape is wound and laminated around an outer periphery of the coil conductor; and a second insulating layer in which a second mica tape is wound and laminated around an outer periphery of the first insulating layer, wherein the first mica tape contains mica in a specific content, wherein 60 mass % or more of the mica contained in the first mica tape passes through a JIS standard sieve having a nominal opening of 250 μm, wherein the first mica tape has a specific lamination thickness, and wherein 40 mass % or less of mica contained in the second mica tape passes through the JIS standard sieve having a nominal opening of 250 μm.
H02K 3/30 - Windings characterised by the insulating material
H02K 3/34 - Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
The present invention provides a rotating machinery diagnosis and monitoring device and method which have high reliability and enable the grasping of a symptom trend of vibrations and a determination of progress of the vibrations during increase and decrease in the rotation speed of a rotor. A rotating machinery diagnosis and monitoring device of the present invention, comprising: an input section that receives vibration values and rotation speeds as operation data of a rotating machine; a computing section that performs computations using the operation data received; and a calculator that includes an output section. The computing section is configured to identify peak values of the vibration values and evaluate each of magnitude of the peak values and the rotation speeds at the peak values. The output section is configured to display externally a result of evaluations performed by the computing section.
A plant operation data monitoring device comprises: an input section that receives operation data on a plant; and a calculator that includes databases storing the operation data received, and a computing section executing a program. The computing section stores the operation data received in a first database of the databases in time series. The computing section determines from peak values of the operation data stored whether gradients of the operation data are positive or negative, and then stores the gradients in a second database of the databases for positive gradients or in the second database of the databases for negative gradients in time series. The computing section determines threshold values for abnormality determination about the positive and negative gradients, divides the positive gradients and the negative gradients into normal values and abnormal values, and additionally stores the divided gradients in the second database for the positive or negative gradients.
G05B 19/418 - Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control (DNC), flexible manufacturing systems (FMS), integrated manufacturing systems (IMS), computer integrated manufacturing (CIM)
A rotor includes: a tubular retaining ring opened on an outer side thereof in an axial direction and covering a coil end portion of each of coils; and rotor baffles and insulation baffles alternately connected in a circumferential direction and partitioning a space in the retaining ring into a first space and a second space, the first space is formed over an entire circumference around a shaft, each rotor baffle includes, at a part thereof on a radially outer side of which a jumper portion is present, a first tapered shape part tilted so as to be more apart from the jumper portion toward a center side in the axial direction of the rotor.
H02K 3/24 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
H02K 9/08 - Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
42.
Rotary electric machine with two-pole rotor and three-phase armature winding
A rotary electric machine comprises a two-pole rotor, a three-phase armature winding, and a stator core having fifty-four slots. An armature winding is stored as a top coil piece and a bottom coil piece in two layers in the slot of the stator core and has three parallel circuits and two phase belts per one phase. Each phase belt includes two parallel circuits. When a sequence of the first and second parallel circuits of one phase belt is viewed from a side closer to a phase belt center, those parallel circuits are arranged in a sequence of the first, second, first, first, second, first, first, first, and second parallel circuits in the top coil pieces and in a sequence of the first, second, first, first, second, first, first, first, and second parallel circuits in the bottom coil pieces to be connected to the top coil pieces. For a sequence of the second and third parallel circuits of the other the phase belt, those parallel circuits are arranged in a sequence of the third, second, third, third, second, third, third, third, and second parallel circuits in the top coil pieces and in a sequence of the third, second, third, third, second, third, third, third, and second parallel circuits in the bottom coil pieces to be connected to the top coil pieces.
H02K 3/28 - Layout of windings or of connections between windings
H02K 3/32 - Windings characterised by the shape, form or construction of the insulation
H02K 3/02 - Windings characterised by the conductor material
H02K 19/12 - Synchronous motors for multi-phase current characterised by the arrangement of exciting windings, e.g. for self-excitation, compounding or pole-changing
A strand of a unit coil of an armature coil is transposed by transposition angle 540 degrees in a slot and transposed by a first transposition angle at coil end portions. In the slot, the strand has a change portion in which the change rate of transposition of the strand is changed. An axial-direction middle point of the change portion is located between a position at transposition angle 90 degrees and a position obtained by adding the first transposition angle of the strand to transposition angle 90 degrees.
H02K 3/14 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots with transposed conductors, e.g. twisted conductors
A stator of a rotating electric machine Includes a stator core that has a plurality of slots and in which electromagnetic steel sheets are stacked in the axial direction, a stator coil inserted into the slots, a finger plate provided on an axially outer end surface of the stator core, and a clamper provided on an axially outer end surface of the finger plate and for clamping the stator core via the finger plate. Furthermore, a rectangular parallelepiped-shaped notch is provided on a part of the finger plate from any position at an anti-stator core side located lateral to an upper stator coil in a circumferential direction to a radially inner end portion.
An endless-track traveling apparatus includes a casing, pulleys having axes arranged in parallel in the casing, a motor for driving the pulleys, and an endless track wound on outer circumferential surface portions of the pulleys to rotate together with the pulleys and move on a traveling target. The endless-track traveling apparatus further includes: a plate-shaped member disposed in contact with the endless track and opposed to the traveling target in a space surrounded by the endless track, and fitted in the casing; a magnet fixed in the casing to attract the traveling target; and an elastic member having one end in contact with an inside of the casing and another end in contact with the plate-shaped member, and urging the plate-shaped member in such a direction as to press the plate-shaped member against the endless track.
The occurrence angle of a crack with respect to a reference line passing by a tooth shoulder portion perpendicularly to the radial direction of a tooth is defined as α. A phased array probe is placed in advance at a position on the outer circumferential surface of a retaining ring that is located in a direction estimated to be perpendicular to the occurrence angle α, and sector scan is performed with an ultrasonic beam radiated from the phased array probe, thereby inspecting whether or not the crack has occurred at the tooth shoulder portion.
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
A bar or coil includes a conductor arranged in a rotating electrical machine and an insulating layer having a predetermined insulation thickness disposed on a surface of the conductor. The repair method includes: extracting a part of the bar or coil as a repair target; removing the insulating layer in a part of the bar or coil as the repair target; disposing a first insulating layer in the part where the insulating layer is removed, the first insulating layer having an insulation thickness thinner than the predetermined insulation thickness; and disposing a second insulating layer on a surface of the first insulating layer to form an insulating layer after a repair where the first insulating layer and the second insulating layer are added, the insulating layer after the repair having a thickness of the predetermined insulation thickness.
The present invention provides a data sorting device and method and a monitoring and diagnosis device, which are able to create a model conveniently. A data sorting device and a monitoring and diagnosis device of the present invention include an operating data database which stores operating data of the plant equipment in a time-series manner. The devices input the operating data that are highly associated physically and engineeringly among the operating data stored in the operating data database, inputting processing attributes relevant to the operating data that are highly associated physically and engineeringly, creating a model simulating characteristics of the plant equipment, and performing data sorting, monitoring, and diagnosis through use of the model.
G06F 7/24 - Sorting, i.e. extracting data from one or more carriers, re-arranging the data in numerical or other ordered sequence, and re-recording the sorted data on the original carrier or on a different carrier or set of carriers
G05B 13/04 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
G06F 17/18 - Complex mathematical operations for evaluating statistical data
G05B 13/02 - Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
A rotary electric machine includes: a rotor which has two poles, and a stator in which eighty four slots are formed, wherein conductors are connected in an order of a conductor X+1t, a conductor X−1b, a conductor X+3t, a conductor X−4b, a conductor X+6t, a conductor X−6b, a conductor X+8t, a conductor X−8b, a conductor X+10t, a conductor X−10b, a conductor X+11t, a conductor X−11b, a conductor X+13t, and a conductor X−13b, in first U, V and W phase series circuits; and conductors are connected in an order of a conductor X+2t, a conductor X−2b, a conductor X+4t, a conductor X−3b, a conductor X+5t, a conductor X−5b, a conductor X+7t, a conductor X−7b, a conductor X+9t, a conductor X−9b, a conductor X+12t, a conductor X−12b, a conductor X+14t, and a conductor X−14b, in second U, V and W phase series circuits.
The invention provides reactive power control equipment that controls the reactive power adjusted by a synchronous condenser coupled to an electric power grid and the reactive power of the electric power supplied to the electric power grid, to optimally control the reactive power in each load terminal point (power consumption area), considering instability of the electric power supplied from renewable energy power generation equipment. The above equipment includes an input portion that inputs information of reactive power including reactive power adjusted by an automatic voltage regulator of automatically adjusting a voltage of electric power generated by an electric power generator and supplied to an electric power grid, reactive power adjusted by a synchronous condenser coupled to the electric power grid, reactive power of electric power generated by the renewable energy power generation equipment, and reactive power set in each load terminal point (consumer area) of consuming the electric power; a calculation unit that calculates each setting value of reactive power adjusted by the synchronous condenser and the automatic voltage regulator, using the information of the reactive power input in the input portion; and an output portion that outputs the setting values of the reactive power calculated by the calculation unit respectively to the synchronous condenser and the automatic voltage regulator.
H02J 3/16 - Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
G01R 21/00 - Arrangements for measuring electric power or power factor
A system and method for monitoring temperature and detecting a temperature rise of a rotating electric machine with high accuracy. A temperature monitoring system for a rotating electric machine includes: sensor data storage that stores values measured by an in-coil temperature sensor and a physical quantity sensor in the rotating electric machine; an in-machine temperature predictor that predicts a temperature by use of the value measured by the physical quantity sensor; a strand temperature calculator that calculates a relationship between a temperature of the strand and a temperature measured by the in-coil temperature sensor, based on the predicted temperature; and a strand temperature predictor that predicts a temperature of the strand from the value measured by the in-coil temperature sensor, and from the relationship between a temperature of the strand and a temperature measured by the in-coil temperature sensor calculated by the strand temperature calculator.
A rotating electrical machine of the present invention comprises a rotor; a stator disposed facing the rotor with a predetermined gap, and including a stator core and a stator coil; a high voltage bushing that outputs electricity from the stator coil to the outside; an electric power line including at least a connection ring extending in a circumferential direction, and connecting the high voltage bushing and one side of a coil end which is an axial-direction end of the stator coil to form an electrical path; and a dummy ring including a metal as a main material, and disposed in alignment with the connection ring in the circumferential direction and in a same circumference as the connection ring.
H02K 3/50 - Fastening of winding heads, equalising connectors, or connections thereto
H02K 3/12 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
H02K 3/28 - Layout of windings or of connections between windings
H02K 3/38 - Windings characterised by the shape, form or construction of the insulation around winding heads, equalising connectors, or connections thereto
53.
Rotating machinery with three-phase armature windings and first and second parallel windings
Rotating machinery includes a two-pole rotor, a stator core with seventy-two slots, and three-phase armature windings, as an example. The armature winding has two phase belts per phase. The phase belt includes a first parallel winding and a second parallel winding which are arranged in the stator slots as top coils and bottom coils. When a circumferential mean position of all top coils and bottom coils included in the phase belt is defined as a phase belt center, an arrangement of the first and second parallel windings in the phase belt, as viewed in order of proximity to the phase belt center, is such that the first and second parallel windings are arranged in order of second/first/second/first/first/second/first/second/first/second/second/first parallel windings as the top coils, and the first and second parallel windings are arranged in order of first/second/second/first/second/first/first/second/first/second/second/first parallel windings as the bottom coils connected to the top coils.
In a wedge looseness diagnosis which is performed by striking wedges of a rotary electric machine, a variation of a wave form of a strike sound is reduced with respect to a variation of an amount of looseness of the wedges, and it is difficult that a slight difference of the amount of the looseness of the wedges is discriminated, so that the wedges are struck by a strike portion in a state where the wedges are pressed by a pressure portion which presses the wedges, and a strike sound at a high frequency is reduced, whereby an amount of a variation of magnitude of the strike sound is enlarged with respect to a valuation of the amount of the looseness of the wedges, and the amount of the looseness of the wedges is judged in accordance with the strike sound which is obtained by a strike sound measuring portion.
There is provided a planar member having a flat portion that makes contact with the inner circumferential surface of an endless track at a position at a traveling subject side with respect to a virtual straight line that connects a vertex, at the traveling subject side, in the outer circumferential surface of a first pulley and a vertex, at the traveling subject side, in the outer circumferential surface of a second pulley.
B25J 5/00 - Manipulators mounted on wheels or on carriages
B62D 55/06 - Endless-track vehicles with tracks and without ground wheels
B62D 57/024 - Vehicles characterised by having other propulsion or other ground-engaging means than wheels or endless track, alone or in addition to wheels or endless track with ground-engaging propulsion means, e.g. walking members specially adapted for moving on inclined or vertical surfaces
B62D 55/24 - Tracks of continuously-flexible type, e.g. rubber belts
B62D 55/265 - Ground-engaging parts or elements having magnetic or pneumatic adhesion
56.
Shaft seal device mounted rotating electrical machine
A shaft seal device mounted rotating electrical machine includes; a rotating electrical machine which includes a rotating shaft equipped with a shaft seal device having an inlet portion and an outlet portion of seal oil, a main oil tank in which the seal oil supplied to the shaft seal device is stored, a seal oil cleanup tank which includes an inlet portion connected to an outlet portion of the main oil tank, and has an oil level regulating valve, a degassing pump which includes an inlet portion connected to an outlet portion of the seal oil cleanup tank, a pressure regulating valve which is disposed between the outlet portion of the seal oil cleanup tank and an outlet portion of the degassing pump, a differential pressure control valve which is disposed between the outlet portion of the degassing pump and the inlet portion of the shaft seal device.
As a configuration of carrying out a turning operation of a brushless synchronous power generation apparatus, there are provided a synchronous generator, an AC exciter, a rotary rectifier attached to an armature of the AC exciter, and short-circuiting means which three-phase short-circuits armature windings of the AC exciter, wherein the armature windings of the AC exciter are short-circuited, causing the AC exciter to operate as an induction motor, thus rotating the rotor shaft of the synchronous generator.
F02N 11/04 - Starting of engines by means of electric motors the motors being associated with current generators
H02K 23/52 - Motors acting also as generators, e.g. starting motors used as generators for ignition or lighting
H02P 9/08 - Control of generator circuit during starting or stopping of driving means, e.g. for initiating excitation
H02P 1/50 - Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual synchronous motor by changing over from asynchronous to synchronous operation
H02P 9/30 - Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
H02K 13/00 - Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
H02K 19/38 - Structural association of synchronous generators with exciting machines
58.
Rotating electrical machine and diagnostic method for the same
A rotating electrical machine of the present invention evaluates a relative displacement of members and improves reliability further even when two or more members operate or move. A rotating electrical machine of the present invention comprises a stator and a rotor disposed on an inner side of the stator with a predetermined gap. The stator includes vibration measuring devices, each of the vibration measuring devices placed on each of at least two members included in the stator, the members having different displacements or phases with each other. The rotating electrical machine includes a device that acquires a relative displacement of one of the members included in the stator by evaluating a difference between displacements or phases measured by the vibration measuring devices and that evaluates a lifetime of the one of the members included in the stator based on the relative displacement.
A stator coil accommodated in a slot of a rotary electric machine includes a coil conductor, a main insulating layer, a low resistance corona shield layer, and a stator coil extending outside the slot is provided with a first stator coil at the end of the low resistance corona shield layer has a first nonlinear resistance layer and a second nonlinear resistance layer partially overlapping with an end of the first nonlinear resistance layer, and a lower limit value of an electric resistivity of the second nonlinear resistance layer in a predetermined electric field is larger than an upper limit value of an electric resistivity of the first nonlinear resistance layer by one order of magnitude or more.
H02K 3/40 - Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges
H02K 3/30 - Windings characterised by the insulating material
H02K 3/32 - Windings characterised by the shape, form or construction of the insulation
60.
Wedge tapping device for rotating electrical machine, wedge inspection system for rotating electrical machine and wedge tapping method for rotating electrical machine
A wedge tapping device for a rotating electrical machine to be inserted through a gap between a rotor and a stator to tap a wedge. The wedge tapping device includes: a tapping portion configured to tap the wedge and having a tapping force measuring portion configured to measure a tapping force of the tapping; an energy supplying portion configured to apply tapping energy to the tapping portion; an absorbing portion configured to suppress energy to be applied to the tapping portion; and a tapping arm, on which the tapping portion is disposed, and which has a longitudinal direction in a direction perpendicular to a direction in which the tapping portion performs tapping. The tapping arm is disposed so that the longitudinal direction is parallel to a rotation axis when the tapping is performed in the gap.
G01N 29/22 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object - Details
G01N 29/14 - Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
A rotating electrical machine includes: a rotor; a stator; a high voltage bushing; power lines connecting the stator coil to the bushing; a support insulator that supports the power lines; a rotating electrical machine outer casing that contains at least the rotor, the stator and a connection portion between the stator coil and the power lines, and is filled with hydrogen gas; and a terminal box which communicates with the outer casing and is attached to a lower portion of the outer casing, the insulator installed in the terminal box, and terminal box containing at least the power lines supported by the insulator and a part of the bushing connected to the supported power lines. The insulator is installed vertically on a bottom face of the terminal box, and the vertically installed insulator and a portion of the bushing in the terminal box are disposed in parallel with each other.
H02K 9/16 - Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle wherein the cooling medium circulates through ducts or tubes within the casing
H02K 3/50 - Fastening of winding heads, equalising connectors, or connections thereto
H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
H02K 5/22 - Auxiliary parts of casings not covered by groups , e.g. shaped to form connection boxes or terminal boxes
H02K 9/08 - Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
F01D 15/10 - Adaptations for driving, or combinations with, electric generators
62.
Rotating electric machine and rotating electric machine production method
This rotating electric machine includes: a rotor having a shaft; a stator formed around the rotor; a seal ring formed around the shaft and having a plurality of through holes; a gland seal formed so as to surround the seal ring and having an oil feed port; and a partition plate formed between the seal ring and the gland seal, wherein the partition plate is formed at a position opposed to the oil feed port and is fixed to an upper wall and a lower wall in an axial direction of the gland seal, and the partition plate has a reinforcing plate at such a position as not to obstruct the oil feed port, the reinforcing plate being fixed to a side wall of the partition plate on a gland seal side and being in close contact with a circumferential wall of the gland seal.
A dynamic vibration absorber needs to be designed so that the natural frequency of the dynamic vibration absorber alone becomes equal to the natural frequency of a stator. If these natural frequencies greatly deviate from each other, the effect is reduced. Therefore, the natural frequency of the dynamic vibration absorber alone needs to be accurately calculated to make designing. However, in actual, the natural frequency is greatly influenced by the rigidity around the mounting position of a vibration damping target, and thus there is a problem that the natural frequency becomes different from the designed value upon mounting. An object of the present invention is to reduce an influence on the natural frequency of the dynamic vibration absorber alone given by the rigidity around the mounting position, by mounting a plurality of dynamic vibration absorbers to a dynamic vibration absorber mounting member, thereby making the dynamic vibration absorber more effective.
A hollow metal part is used as a pipe component for a refrigerant flow path of a rotating electrical machine adapted to cool a stator coil with a refrigerant. The rotating electrical machine includes a connection arm that couples the stator coil and a power supply terminal at a stator coil end portion of the stator coil, and an insulating hose that is coupled to the stator coil and the connection arm through a first hollow metal part in order to supply the refrigerant to the stator coil and the connection arm. The first hollow metal part is formed integrally by joining a part formed of stainless steel to a part made of oxygen-free copper.
H02K 1/20 - Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
H02K 15/00 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
H02K 9/22 - Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
H02K 3/24 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
H02K 9/197 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
09 - Scientific and electric apparatus and instruments
37 - Construction and mining; installation and repair services
Goods & Services
Measuring and testing apparatus and instruments, namely, apparatus for analyzing, by percussion test, vibration of generator coils caused by loosening of resin materials fixing the generator coils Repair or maintenance of power generators
09 - Scientific and electric apparatus and instruments
37 - Construction and mining; installation and repair services
Goods & Services
(1) Industrial robots for inspection of current generators
(2) Measuring or testing machines and instruments, namely, apparatus for analyzing, by percussion test, vibration of power generator coils caused by loosening of resin materials fixing the power generator coils (1) Repair or maintenance of power generators
A journal bearing, in which a lower half carrier ring is disposed on the outer peripheral side of a horizontally installed rotating shaft, and an upstream side pad and a downstream side pad are disposed on the inner side of the lower half carrier ring, includes an upstream side oil supply portion and downstream side oil supply portion which supply lubricant oil to the upstream side pad and downstream side pad, the bearing being characterized in that the supply quantity of lubricant oil supplied from downstream side oil supply nozzles of the downstream side oil supply portion is adjusted so as to be less than the supply quantity of lubricant oil supplied from upstream side oil supply nozzles of the upstream side oil supply portion.
A partial discharge signal processing device of the present invention is provided with: a partial discharge signal receiving unit disposed inside a high voltage electric machine device; a partial discharge signal processing unit; and a coaxial cable connecting the partial discharge signal receiving unit and the partial discharge signal processing unit. In addition, the partial discharge signal receiving unit comprises an electromagnetic wave receiving unit that receives electromagnetic waves generated by partial discharge. Further, the partial discharge signal processing unit comprises: a detection unit that detects a partial discharge signal transmitted through the coaxial cable; a band limiting unit that limits the frequency bandwidth of the partial discharge signal; an attenuation amount correction unit that corrects an attenuated partial discharge signal; and a signal output unit that outputs, to an external device, the corrected partial discharge signal.
Rotating machinery includes a rotor of 2n poles, 84n slots, and three-phase stator windings, where n is an integer equal to or greater than 1. A top coil and a bottom coil accommodated at the diametrically inner and outer sides of the slot are connected to each other to form the stator winding. The stator windings have 2n phase belts per one phase, the phase belt including two parallel windings. In at least one of the phase belts, the one coils are disposed in the order of the second, first, first, second, first, second, first, second, second, first, second, first, second, and first parallel windings; the other coils connected to the one coils are disposed in the order of the first, second, second, first, second, first, second, first, second, first, first, second, first, and second parallel windings.
Gas coolers one of which is housed in a gas cooler chamber provided at an upper portion of a casing and installed near an opening of the casing above each stator coil end, are provided. A gas circulation passage is formed in which a cooling gas circulates through a space A provided at an intake side of each fan→a space B surrounding the fan→the gas cooler chamber→the gas cooler→a space C including the stator coil end→a gap between a rotor and a stator and gas passages formed in the rotor and the stator→a space D between an outer periphery of the stator and the casing→the space A.
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
H02K 7/14 - Structural association with mechanical loads, e.g. with hand-held machine tools or fans
H02K 9/18 - Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing
71.
Friction stir welding of a solder coated strand coil to a solid coil
A rotor coil for a revolving armature includes a strand coil that includes a part arranged in a core slot of the rotor and is composed of a plurality of element wires; and a solid coil welded to an end of the strand coil wherein the end of the strand coil and an end of the solid coil are welded by friction stir welding. A manufacturing method of a rotor coil includes the step of performing friction stir welding wherein the friction stir welding is performed for the butt joint with the end of the strand coil arranged in an advancing side defined by a rotation direction of a tool and with the solid coil arranged in a retreating side.
B23K 20/12 - Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
H02K 15/00 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
H02K 3/51 - Fastening of winding heads, equalising connectors, or connections thereto applicable to rotors only
H02K 15/04 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings, prior to mounting into machines
H02K 3/14 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots with transposed conductors, e.g. twisted conductors
H02K 15/02 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
B23K 1/00 - Soldering, e.g. brazing, or unsoldering
H02K 3/28 - Layout of windings or of connections between windings
H02K 3/46 - Fastening of windings on the stator or rotor structure
An electric rotating machine does not require management of the gap between a fan guide at a small-diameter portion and a fan fixing portion and can suppress the manufacturing and maintenance costs from increasing. An electric rotating machine is provided with a small-diameter portion fan guide that extends both in a circumferential direction and in an axial direction in such a way as to be provided a space in the radial-direction outer side of a small-diameter portion that is a portion of an extending axle portion, of a rotation axle, that extends in the axial direction from a rotor, the portion being at an axial-direction departing side than a fan fixing portion to which an axial-flow fan is fixed and in such a way that the small-diameter portion fan guide is disposed to be provided a space with the fan fixing portion in the axial direction.
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
H02K 7/14 - Structural association with mechanical loads, e.g. with hand-held machine tools or fans
H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
H02K 9/10 - Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
A rotating electrical machine includes: a rotor core in which a slot passing therethrough is provided; a rotor winding which coil end portion is extended on the axially outer side than the core end face of the rotor core; a U-shaped channel which is arranged on the slot of the rotor core, is touched to come into contact with a bottom portion of the rotor winding, and is axially extended to be projected on the axially outer side than the core end face of the rotor core; a slot cell which insulates the rotor winding and the U-shaped channel from the rotor core; and an interposed piece arranged between the rotor windings at a portion more projected than the core end face of the rotor core. The projected end face of the U-shaped channel is arranged on the axially inner side than the projected end face of the interposed piece.
H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
H02K 3/34 - Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
In order to improve cooling performance of a rotor of a rotary electric machine, attention is paid to the relation between the secondary flow of a cooling gas generated inside ventilation holes for the cooling gas provided in a rotor winding formed by stacking a conductor and an interlayer insulating layer and the main flow of the cooling gas during the rotary motion of the rotor, and the secondary flow of the cooling gas is suppressed by changing the shape of bulges appearing in a linear shape in the stacked direction on an inner wall surface of each rotor winding ventilation hole on a negative pressure side.
H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
H02K 3/24 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
H02K 9/08 - Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
H02K 3/32 - Windings characterised by the shape, form or construction of the insulation
H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
To obtain a rotary electric machine in which an insulation failure does not occur even when the output of the rotary electric machine is increased by improving the cooling performance at the rotor winding ends. The rotary electric machine includes a rotor winding wound around a rotor core with a gap, rotor winding ends formed by the rotor winding protruding to an end surface of the rotor core in an axial direction, spacers arranged between adjacent rotor winding ends, mountain-shaped winding support portions provided on both surfaces of the spacers and having an apex with an obtuse angle, meandering ventilation paths formed on both surfaces of the spacers by the mountain-shaped winding support portions and wave-shaped winding support portions formed in the meandering ventilation paths along the meandering ventilation paths.
H02K 3/24 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
76.
Insulating tape and production method thereof, stator coil and production method thereof, and rotating electric machine
2. The insulating tape is useful to form a stator coil insulating layer with high thermal conductivity, with no outflow of a filler to the exterior during production of the stator coil, and with enhanced bonding strength.
H01B 3/04 - Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances mica
H01B 3/32 - Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances waxes natural resins
H02K 3/30 - Windings characterised by the insulating material
H01B 19/04 - Treating the surfaces, e.g. applying coatings
H01B 3/18 - Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
H02K 3/40 - Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges
C09J 163/00 - Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
H02K 1/04 - DYNAMO-ELECTRIC MACHINES - Details of the magnetic circuit characterised by the material used for insulating the magnetic circuit or parts thereof
H02K 15/10 - Applying solid insulation to windings, stators or rotors
H02K 15/12 - Impregnating, heating or drying of windings, stators, rotors or machines
Insulating objects arranged in parallel between adjacent element wire conductors of a plurality of the element wire conductors in a circumferential direction of the rotating electrical machine on each of both sides interposing a dislocating portion of the element wire conductor and linearly extending along the adjacent element wire conductors; a storage space formed between the linear insulating objects arranged in parallel at each of the both sides interposing the dislocating portion; and a temperature detection sensor configured to detect a temperature of the element wire conductors and stored in the storage spaces at each of the both sides interposing the dislocating portion across both sides interposing the dislocating portion are provided, wherein the hardness of the insulating objects is lower than the hardness of the element wire conductors, whereby the types of the rotating electrical machine to which the temperature detection sensor can be applied may be extensively increased.
H02K 11/00 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
H02K 11/25 - Devices for sensing temperature, or actuated thereby
H02K 3/34 - Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
H02K 3/28 - Layout of windings or of connections between windings
H02K 3/38 - Windings characterised by the shape, form or construction of the insulation around winding heads, equalising connectors, or connections thereto
H02K 15/00 - Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
H02K 3/14 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots with transposed conductors, e.g. twisted conductors
80.
Rotating electric machine with shaft-seal devices having partition plate
In a rotating electric machine with shaft-seal devices mounted thereon, an object to provide them is to uniformize a temperature distribution of a sealing ring with a simple structure. The rotating electric machine with the shaft-seal devices mounted thereon includes a rotor having a shaft; a stator disposed in a circumferential surrounding of the rotor; a sealing ring having a plurality of through holes formed therein, being disposed in a circumferential surrounding of the shaft; a gland seal having an oil supply opening therein, for enclosing a circumferential surrounding of the sealing ring; a partition plate disposed between the sealing ring and the gland seal; and a housing on which the gland seal is fixed, for accommodating the rotor and the stator.
H02K 5/10 - Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. of water or fingers
A penetration terminal for connecting the coaxial cables inside and outside of the apparatus thereto is attached on the electric apparatus' frame, and the measurement of a combined capacitance of the antenna and the coaxial cable in the inner side of the apparatus is made possible from the outer side of the apparatus, so that it is possible to perform at any time the determination whether a wiring connection of the antenna mounted in the inner side of the electric apparatus is appropriate.
G01R 31/04 - Testing connections, e.g. of plugs or non-disconnectable joints
G01R 35/00 - Testing or calibrating of apparatus covered by the other groups of this subclass
G01R 31/12 - Testing dielectric strength or breakdown voltage
G01R 27/26 - Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants
84.
Resin injection method into laminated core, and rotating electric machine using the resin injection method
An object is to easily inject resin into a gap of a laminated core which constitutes a rotating electric machine. Included are: a resin supplying unit which feeds the resin; and a resin injection unit which injects the resin into an axial hole of the laminated core. The resin injection unit has an injection pipe and an elastic ring attached to the injection pipe. This elastic ring is made to firmly attach to the inner periphery of the axial hole; the resin is supplied from the resin supplying unit; and the resin is injected into the gap of the laminated core through the axial hole of the laminated core.
B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
H02K 15/12 - Impregnating, heating or drying of windings, stators, rotors or machines
H02K 1/00 - DYNAMO-ELECTRIC MACHINES - Details of the magnetic circuit
H02K 15/10 - Applying solid insulation to windings, stators or rotors
09 - Scientific and electric apparatus and instruments
Goods & Services
Turbine generators; starters for motors and engines; AC
motors and DC motors [not including those for land vehicles
but including "parts" for any AC motors and DC motors]; AC
generators [alternators]; DC generators; dynamo brushes. Power distribution or control machines and apparatus; rotary
converters; phase modifiers; magnetic cores; resistance
wires; electrodes, other than welding electrodes or medical
electrodes.
86.
Insulating tape, method for producing same, and stator coil
An insulating tape including: a mica layer containing mica; a reinforcing layer that is laminated onto the mica layer and contains a filler and a fibrous reinforcing material; and a flat sheet layer that is laminated onto the reinforcing layer and contains flat sheet-shaped inorganic particles having an aspect ratio of at least 30. In this insulating tape, the filler is supported in advance, and does not therefore flow out during manufacture of a stator coil, for example during hot-pressing. As a result, an insulating coating exhibiting high thermal conductivity can be formed.
H02K 21/00 - Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
H02K 15/12 - Impregnating, heating or drying of windings, stators, rotors or machines
H02K 3/00 - DYNAMO-ELECTRIC MACHINES - Details of windings
H02K 3/34 - Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
B32B 19/04 - Layered products essentially comprising natural mineral fibres or particles, e.g. asbestos, mica next to another layer of a specific substance
H01B 3/04 - Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances mica
B32B 5/16 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by features of a layer formed of particles, e.g. chips, chopped fibres, powder
B32B 5/30 - Layered products characterised by the non-homogeneity or physical structure of a layer characterised by the presence of two or more layers which comprise fibres, filaments, granules, or powder, or are foamed or specifically porous one layer comprising granules or powder
B32B 7/12 - Interconnection of layers using interposed adhesives or interposed materials with bonding properties
H01B 19/04 - Treating the surfaces, e.g. applying coatings
H02K 3/30 - Windings characterised by the insulating material
B32B 19/02 - Layered products essentially comprising natural mineral fibres or particles, e.g. asbestos, mica bonded with or embedded in a plastic substance
B32B 27/20 - Layered products essentially comprising synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
A rotating electrical machine is configured such that, in a rotor coil, ventilation passages are formed in two lines arranged in a width direction of the rotor coil, and formed in the same shape at a plurality of positions spaced from each other in a longitudinal direction, 0.3≦W1/W2≦0.7 . . . (Expression 1) is satisfied, where (W1) is a width dimension of the ventilation passage in the longitudinal direction and (W2) is a width dimension from one end of the ventilation passage to one end of another ventilation passage adjacent thereto, and 0.025≦W4/W3≦0.08 . . . (Expression 2) is satisfied, where (W3) is a width dimension of the rotor coil and (W4) is a width dimension of the ventilation passage.
H02K 3/24 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
H02K 9/10 - Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
09 - Scientific and electric apparatus and instruments
42 - Scientific, technological and industrial services, research and design
Goods & Services
Measuring or testing machines and instruments;
non-destructive testing apparatus utilizing X-ray;
ultrasonic non-destructive testing apparatus;
electromagnetic non-destructive testing instruments. Research on building construction or city planning; testing
or research on prevention of pollution; testing or research
on electricity; testing or research on civil engineering;
non-destructive testing.
09 - Scientific and electric apparatus and instruments
42 - Scientific, technological and industrial services, research and design
Goods & Services
Measuring or testing machines and instruments for testing, determining, and measuring the static tightness of stator wedge, and the change in the tightness of the stator wedge over a period of time; non-destructive testing apparatus utilizing X-ray for testing, determining, and measuring the static tightness of stator wedge, and the change in the tightness of the stator wedge over a period of time; ultrasonic non-destructive testing apparatus for testing, determining, and measuring the static tightness of stator wedge, and the change in the tightness of the stator wedge over a period of time; electromagnetic non-destructive testing instruments for testing, determining, and measuring the static tightness of stator wedge, and the change in the tightness of the stator wedge over a period of time Research on building construction or city planning: testing or research on prevention of pollution; testing or research on electricity; testing or research on civil engineering; non-destructive testing for testing, determining, and measuring the static tightness of stator wedge, and the change in the tightness of the stator wedge over a period of time
A side milling cutter for slot cutting is provided whose vibration can be damped even in cases where a vibration mode of the cutter generates plural nodes in a cutting part. A side milling cutter for slot cutting of the present invention includes a disc-shaped cutter and a plurality of cartridges as cutting edges provided at a predefined interval in a circumferential direction along an outer circumference of the disc-shaped cutter. The disc-shaped cutter cuts a predefined slot on a workpiece using the cartridges by circumferentially rotating. The disc-shaped cutter internally includes a plurality of vibration damping structures in the circumferential direction on a disk surface of the disc-shaped cutter.
09 - Scientific and electric apparatus and instruments
Goods & Services
Turbine generators; starters for motors and engines; AC
motors and DC motors [not including those for land vehicles
but including "parts" for any AC motors and DC motors]; AC
generators [alternators]; DC generators; dynamo brushes. Power distribution or control machines and apparatus; rotary
converters; phase modifiers; magnetic cores; resistance
wires; electrodes, other than welding electrodes or medical
electrodes.
09 - Scientific and electric apparatus and instruments
42 - Scientific, technological and industrial services, research and design
Goods & Services
Measuring or testing machines and instruments;
non-destructive testing apparatus utilizing X-ray;
ultrasonic non-destructive testing apparatus;
electromagnetic non-destructive testing instruments. Research on building construction or city planning; testing
or research on prevention of pollution; testing or research
on electricity; testing or research on civil engineering;
non-destructive testing.
09 - Scientific and electric apparatus and instruments
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Measuring and testing machines and instruments that use vibration and tone for testing, evaluating and analyzing the operation of and the tightness of the components of industrial machinery, electric machines, and generators; measuring and testing machines and instruments, namely X-ray machines and instruments for testing, evaluating and analyzing the operation of and the tightness of the components of industrial machinery, electric machines, and generators; ultrasonic machines and instruments for testing, evaluating and analyzing the operation of and the tightness of the components of industrial machinery, electric machines, and generators; electromagnetic machines and instruments for testing, evaluating and analyzing the operation of and the tightness of the components of industrial machinery, electric machines, and generators (1) Research on building construction and city planning; testing and research on prevention of pollution; testing and research on electricity; testing and research on civil engineering; non-destructive testing, namely testing the reliable operation of and the tightness of the components of industrial machinery, electric machines, and generators; non-destructive testing, namely, materials testing, analyzing and evaluation services
94.
Rotating machinery with three-phase armature windings and first and second parallel windings
Rotating machinery of the invention includes a 2n-pole rotor, 72n slots, and three-phase armature windings (n≥1). Each of the slots houses a top coil on an inner radius side of the slots and a bottom coil on an outer radius side thereof. Each of the armature windings is formed by connecting the top and bottom coils and has 2n phase belts per phase. Each of the phase belts includes a first parallel winding and a second parallel winding. The top and bottom coils are formed by arranging the first and second parallel windings in a predefined order when a circumferential mean position of all top coils and bottom coils in each of the phase belts is defined as a phase belt center and an arrangement of the first and second parallel windings in at least one phase belt is viewed in an order of proximity to the phase belt center.
H02K 3/12 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
H02K 3/14 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots with transposed conductors, e.g. twisted conductors
H02K 3/28 - Layout of windings or of connections between windings
95.
Rotating electric machine including a cooling device for cooling a fluid in the rotating electric machine
A cooling device mounted in the interior of a frame of a rotating electric machine is configured in such a manner that at least one of the end-face portions between a first end-face portion through which a cooling fluid flows into the cooling device and a second end-face portion from which the cooling fluid flows out thereof is placed tilting with respect to a minimum-width's direction of a frame's internal flow-path in vicinity to the cooling device, or with respect to at least one of an inflow direction and outflow direction of the cooling fluid.
H02K 9/08 - Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
H02K 9/18 - Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle wherein the external part of the closed circuit comprises a heat exchanger structurally associated with the machine casing
H02K 9/12 - Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing wherein the cooling medium circulates freely within the casing
H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
96.
Rotating electric machine including a cooling device for cooling a fluid in the rotating electric machine
A cooling device mounted in a flow path formed by an internal space of a cooling fluid duct being mounted on the periphery of a frame of a rotating electric machine is configured in such a manner that at least one of the end-face portions between a first end-face portion through which a cooling fluid flows into the cooling device and a second end-face portion from which the cooling fluid flows out thereof is placed tilting with respect to at least one of a first orthogonal surface perpendicular to an inflow direction of the cooling fluid and a second orthogonal surface perpendicular to an outflow direction of the cooling fluid, or with respect to a flow-path-width's direction perpendicular to a direction in which an axis line of a stator extends.
H02K 9/08 - Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
H02K 9/12 - Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing wherein the cooling medium circulates freely within the casing
H02K 9/00 - Arrangements for cooling or ventilating
H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
A hydro dynamic bearing device comprising an upper half of a main bearing and a lower half of the main bearing, wherein the upper half of the main bearing is lined with a low-strength metal such as a Babbitt metal, wherein a circumferential groove is formed in the lower half of the main bearing, and wherein the low-strength metal of the upper half of the main bearing, which is formed at a region opposed to a downstream side of the circumferential groove formed in the lower half of the main bearing, is partially removed to cause a high-strength bearing base metal to be partially exposed.
F16C 32/06 - Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
A fixing force measuring apparatus including a section for applying a predetermined controlled hammering force to a wedge surface to generate a hammering sound, a section for controlling the hammering sound generated, a section for obtaining plural kinds of feature quantities such as a feature quantity due to a hammering sound energy, and a feature quantity due to a frequency of the hammering sound from the hammering sound collected by an arithmetic operation, and a section for obtaining a fixing force corresponding to the plural kinds of feature quantities by using a correlative relationship between the wedge fixing force previously obtained, and the plural kinds of feature quantities.
An eddy current testing apparatus includes: an eddy current testing probe having an eddy current testing coil arranged on a bottom portion of a casing; a pressing mechanism configured to press the eddy current testing probe so that the bottom portion of the eddy current testing probe is placed in contact with a part of an inner wall surface of a slot formed in an object to be inspected; a carriage configured to mount the pressing mechanism and the eddy current testing probe, the carriage traveling in a depth direction of the slot; and an eddy current testing control device configured to control defect detection for the inner wall surface of the slot by acquiring a detected eddy current signal from the eddy current testing coil.
G01N 27/82 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
G01N 27/90 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
100.
Tightness measuring apparatus and measuring method
According to a method by a frequency analysis of tap tones at the time when a tightness of a ripple member fixed by an elastic force has been tapped by a hammer or a method of detecting a response at the time when the ripple member has been vibrated, an enough precision cannot be obtained for a tightness estimation. A tapping force is applied to a plurality of positions on the member surface, thereby allowing a plurality of tap tones to be generated. Feature amounts are obtained from the plurality of tap tones. An average feature amount is obtained by averaging the feature amounts. The tightness of the ripple member is estimated from the average feature amount by using a correlation between the tightness of the ripple member and the average feature amount.
