The invention concerns a method for estimating and/or predicting at least the temperature of asynchronous or induction machine, for example a DFIM, connected to a grid, said rotor comprising : - a stack of steel laminations (25), each steel lamination comprising an inner part (26), also called the yoke, surrounded by teeth (28); - a rotor winding (32), integrated between teeth (28), in which the rotor currents flow, the method comprising: a) a step of selecting one or more steel laminations of said stack of steel laminations, b) a step of selecting at least one node on each of said selected steel laminations in the yoke (26) and/or in the teeth (28) and/or in the rotor winding (32), c) then a step of estimating and/or predicting at least one temperature of said rotor, based on the balance of the power that flows in said at least one node, and that is dissipated by the at least one node.
G01K 7/42 - Circuits effecting compensation of thermal inertiaCircuits for predicting the stationary value of a temperature
G01K 13/08 - Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies in rotary movement
H02K 11/25 - Devices for sensing temperature, or actuated thereby
F03B 13/00 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates
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
F03B 3/04 - Machines or engines of reaction typeParts or details peculiar thereto with substantially axial flow throughout rotors, e.g. propeller turbines
3.
HYDROTURBINE COMPONENT COMPRISING A MODIFIED TRAILING EDGE
The invention concerns a hydraulic component or piece of a hydraulic turbine, said component or piece having a pressure side and a suction side which extend between a leading edge (8) and a trailing edge (32), at least one part of the trailing edge comprising a series of patterns (34,44, 54, 64).
F03B 3/10 - Machines or engines of reaction typeParts or details peculiar thereto characterised by having means for functioning alternatively as pumps or turbines
The invention concerns a method for detecting a fatigue undergone on at least one specific location of a hydraulic unit (10), the method being characterized in that the fatigue undergone on the at least on specific location is detected by at least one fatigue indicator (F) said at least one fatigue indicator arranged for being remotely queried via wirings or via a wireless connection.
The invention concerns a turbine (100, 106) comprising : - a shaft (126); - a Kaplan runner which comprises a number of blades (116), and a hub (114), located at the end of the shaft and bearing the blades, - means (10) for generating dry air; - means (12, 16) for supplying the turbine with a flow (120) of said dry air; - means (14, 18, 22, 27, 35) for evacuating a flow (185) of air out of said turbine after said flow of dry air has flowed at least through the hub (114).
F03B 11/00 - Parts or details not provided for in, or of interest apart from, groups
F03B 3/06 - Machines or engines of reaction typeParts or details peculiar thereto with substantially axial flow throughout rotors, e.g. propeller turbines with adjustable blades, e.g. Kaplan turbines
The invention concerns a turbine (100, 106) comprising : - a shaft (126); - a Kaplan runner which comprises a number of blades (116), and a hub (114), located at the end of the shaft and bearing the blades, - means (10) for generating dry air; - means (12, 16) for supplying the turbine with a flow (120) of said dry air; - means (14, 18, 22, 27, 35) for evacuating a flow (185) of air out of said turbine after said flow of dry air has flowed at least through the hub (114).
F03B 3/06 - Machines or engines of reaction typeParts or details peculiar thereto with substantially axial flow throughout rotors, e.g. propeller turbines with adjustable blades, e.g. Kaplan turbines
The invention relates to a device for inspecting a damage or a crack of part of a hydro turbine, comprising at least one underwater remote operated vehicle (20) or autonomous underwater vehicle, at least one floatable or buoyant probe (26) or at least one probe (26) and means to make said at least one probe floatable, said probe comprising at least one imaging device (32) and/or laser scaler, and means for transmitting data from said probe to said vehicle or to a ground station when it is distant from said vehicle.
The present invention concerns a stator frame (10) for carrying a stator core (20) of a vertical axis hydroelectric generator. The stator frame comprises at least one stator foot (30) for supporting a weight force of the stator frame. The stator foot (30) comprises a frame side part (50) and a ground side part (60) configured for slidably moving relative to each other. The ground side part (60) and the frame side part (50) are shaped such that the weight force exerted from the stator frame (10) on the stator foot (30) results in a reaction force on the stator frame (10) which is non-parallel to said weight force.
The invention relates to a method for repairing a damage or a defect (20, 40, 60) in a piece (22) of metallic material, comprising: a) measuring with at least one sensor (121) of a remote operated vehicle (120) first geometrical data of at least a plurality of points or areas of the defect or damage; b) based on at least on said first geometrical data, generating data of one or more zones of said defect or damage to excavate; c) excavating with help of a remote operated vehicle (120) said piece according to said data of one or more zones of said defect or damage to excavate, thereby forming an excavated zone; d) depositing metallic material (28) with help of a remote operated vehicle in at least part of said excavated zone.
The invention relates to a method for repairing a damage or a defect (20, 40, 60) in a piece (22) of metallic material, comprising: a) measuring with at least one sensor (121) of a remote operated vehicle (120) first geometrical data of at least a plurality of points or areas of the defect or damage; b) based on at least on said first geometrical data, generating data of one or more zones of said defect or damage to excavate; c) excavating with help of a remote operated vehicle (120) said piece according to said data of one or more zones of said defect or damage to excavate, thereby forming an excavated zone; d) depositing metallic material (28) with help of a remote operated vehicle in at least part of said excavated zone.
A runner for a hydraulic machine comprising a band, a crown, a plurality of blades extending between the crown and the band, wherein the runner comprises a plurality of runner segments which together define the runner, each runner segment comprising a band portion, a crown portion and a blade, which portions are integrally formed with one another, each runner segment being attachable to another segment at a band joining edge and a crown joining edge, wherein the band joining edge and the crown joining edge are each spaced apart from the blade of the segment.
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
The invention relates to a device (1) for inspecting a cavitation damage or a crack of a runner (7) of a hydro turbine, comprising a remote operated vehicle (20) or an autonomous underwater vehicle, comprising at least one camera and/or scanner, and means (24) for processing images from said camera and/or scanner to generate at least one 3D view and/or IR thermal view of at least a part of a surface, or of a subsurface, of said runner comprising said cavitation damage or crack, said device further comprising means to reconstruct a 3D view by photogrammetry and/or means for locally heating, for example by induction or by a laser or by a heated water jet, said at least one part of a surface of said runner comprising said cavitation or crack.
The invention concerns an inter-blade profile (14) for a turbine runner blade, said inter-blade profile (14) comprising a profile (16), and a plug (18), forming a basis of the profile (16) and intended for being inserted into a corresponding hole (21) made in a blade.
A salient pole machine a rotor having a rotor rim. A plurality of salient poles having a pole winding and extending in the radial direction are attached to the rotor rim, with the rotor rim having an outermost radial surface between the pole-rim interfaces. A plurality of axial rib-like rim extensions project radially from the outermost radial surface of the rotor rim with a predetermined circumferential distance between neighboring rim extensions. A plurality of axial pole grooves in the salient pole match and receive the rim extensions. Fixing elements fix the rim extensions in the pole grooves and are inserted axially into facing interface holes defined in facing sidewalls of the pole grooves and the rib-like rim extensions. The fixing elements are radially inward of the pole windings and are accessible for axial sliding removal from the facing interface holes.
e) connecting the second hydroelectric unit (100) to the grid and disconnecting the generator of the second hydroelectric unit from said variable frequency drive (20).
F03B 3/10 - Machines or engines of reaction typeParts or details peculiar thereto characterised by having means for functioning alternatively as pumps or turbines
Method for controlling a hybrid power generation plant by varying power production of one of a plurality of power sources based on data from the grid and characteristics of each power source
A method and system for controlling a hybrid power generation plant by receiving from a grid a data from among a power demand, a peak hour, a frequency, a ramp, a reactive power, or a voltage. A power production of power sources in the plant is varied depending on the received data and a characteristic of each of the power sources. The varying increases an active power produced by the plant while maintaining reactive power at a constant level by increasing a real power of a first power source while decreasing a reactive power produced by the first power source and simultaneously increasing a reactive power produced by a second power source without increasing a real power produced by the second power source. The first power source is a different type of power source from the second power source.
The invention relates to a device for inspecting a damage or a crack of part of a hydro turbine, comprising at least one underwater remote operated vehicle (20) or autonomous underwater vehicle, at least one floatable or buoyant probe (26) or at least one probe (26) and means to make said at least one probe floatable, said probe comprising at least one imaging device (32) and/or laser scaler, and means for transmitting data from said probe to said vehicle or to a ground station when it is distant from said vehicle.
The invention relates to a device for inspecting a damage or a crack of part of a hydro turbine, comprising at least one underwater remote operated vehicle (20) or autonomous underwater vehicle, at least one floatable or buoyant probe (26) or at least one probe (26) and means to make said at least one probe floatable, said probe comprising at least one imaging device (32) and/or laser scaler, and means for transmitting data from said probe to said vehicle or to a ground station when it is distant from said vehicle.
b) determining a mechanical stress on a specific location of the hydraulic surface, via a transfer function that correlates the physical quantity measured in step a) and said mechanical stress on the specific location.
H02J 3/44 - Synchronising a generator for connection to a network or to another generator with means for ensuring correct phase sequence
F03B 13/00 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
H02K 19/36 - Structural association of synchronous generators with auxiliary electric devices influencing the characteristic of the generator or controlling the generator, e.g. with impedances or switches
A hydraulic turbine includes a runner having a shaft, a runner crown, and a runner tip. Blades are fixed to the runner crown and are rotatable around an axis of rotation in operation of the hydraulic turbine, each blade including a leading edge and a trailing edge. A first chamber is located between the runner crown and a stationary head cover, or within head cover. A second chamber is located in the runner tip. A passage for water is defined between the first chamber and the second chamber. The runner crown has an upper portion and a lower portion, the upper portion having a larger diameter than the lower portion such that a channel is defined between the upper and lower portions. The channel has a circular shape and a circular symmetry around the axis of rotation and leads to a discharge region below the runner.
F03B 11/04 - Parts or details not provided for in, or of interest apart from, groups for diminishing cavitation or vibration, e.g. balancing
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
25.
METHOD AND DEVICE FOR INSPECTING HYDRO TURBINE RUNNER
The invention relates to a device (1) for inspecting a cavitation damage or a crack of a runner (7) of a hydro turbine, comprising a remote operated vehicle (20) or an autonomous underwater vehicle, comprising at least one camera and/or scanner, and means (24) for processing images from said camera and/or scanner to generate at least one 3D view and/or IR thermal view of at least a part of a surface, or of a subsurface, of said runner comprising said cavitation damage or crack, said device further comprising means to reconstruct a 3D view by photogrammetry and/or means for locally heating, for example by induction or by a laser or by a heated water jet, said at least one part of a surface of said runner comprising said cavitation or crack.
F03B 1/00 - Engines of impulse type, i.e. turbines with jets of high-velocity liquid impinging on bladed or like rotors, e.g. Pelton wheelsParts or details peculiar thereto
G01N 21/00 - Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
26.
METHOD AND DEVICE FOR INSPECTING HYDRO TURBINE RUNNER
The invention relates to a device (1) for inspecting a cavitation damage or a crack of a runner (7) of a hydro turbine, comprising a remote operated vehicle (20) or an autonomous underwater vehicle, comprising at least one camera and/or scanner, and means (24) for processing images from said camera and/or scanner to generate at least one 3D view and/or IR thermal view of at least a part of a surface, or of a subsurface, of said runner comprising said cavitation damage or crack, said device further comprising means to reconstruct a 3D view by photogrammetry and/or means for locally heating, for example by induction or by a laser or by a heated water jet, said at least one part of a surface of said runner comprising said cavitation or crack.
F03B 1/00 - Engines of impulse type, i.e. turbines with jets of high-velocity liquid impinging on bladed or like rotors, e.g. Pelton wheelsParts or details peculiar thereto
G01N 21/00 - Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
The invention concerns a method for coupling a hydroelectric power plant in a turbine mode to a grid, in order to generate power for a grid, said hydroelectric power plant comprising at least a first hydroelectric unit (10) and a second hydroelectric unit (100), each provided with a runner (6) mechanically coupled to a shaft line (8) and to a generator, a distributor (4) comprising guide vanes to control a flow of water to said runner, said hydroelectric power plant further comprising a variable frequency drive (20), the method comprising: a) starting the rotation of at least said first hydroelectric unit (10) and said second hydroelectric unit (100); b) connecting the variable frequency drive (20) to the generator of the first hydroelectric unit (10) and to the grid and stabilizing the speed of the first hydroelectric unit c) connecting the first hydroelectric unit (10) to the grid and disconnecting the generator of the first hydroelectric unit from the variable frequency drive (20); d) connecting said variable frequency drive (20) to the generator of the second hydroelectric unit (100) and to the grid and stabilizing the speed of the second hydroelectric unit; e) connecting the second hydroelectric unit (100) to the grid and disconnecting the generator of the second hydroelectric unit from said variable frequency drive (20).
The invention concerns a method for coupling a hydroelectric power plant in a turbine mode to a grid, in order to generate power for a grid, said hydroelectric power plant comprising at least a first hydroelectric unit (10) and a second hydroelectric unit (100), each provided with a runner (6) mechanically coupled to a shaft line (8) and to a generator, a distributor (4) comprising guide vanes to control a flow of water to said runner, said hydroelectric power plant further comprising a variable frequency drive (20), the method comprising: a) starting the rotation of at least said first hydroelectric unit (10) and said second hydroelectric unit (100); b) connecting the variable frequency drive (20) to the generator of the first hydroelectric unit (10) and to the grid and stabilizing the speed of the first hydroelectric unit c) connecting the first hydroelectric unit (10) to the grid and disconnecting the generator of the first hydroelectric unit from the variable frequency drive (20); d) connecting said variable frequency drive (20) to the generator of the second hydroelectric unit (100) and to the grid and stabilizing the speed of the second hydroelectric unit; e) connecting the second hydroelectric unit (100) to the grid and disconnecting the generator of the second hydroelectric unit from said variable frequency drive (20).
The invention concerns a method for starting a hydroelectric turbine (10) in a pumping mode, said turbine being provided with a runner (6) mechanically coupled to a shaft line (8) and a variable speed electric motor connected to a grid, a distributor (4) comprising guide vanes to control a flow of water to said runner, the method comprising: a) a step of operating the variable speed motor at least partly at fixed speed, said guide vanes being only partially opened, and of defining or calculating: - data of a plurality of hydraulic characteristics (C1, C2, Ci) of the turbine for an operation without cavitation; - data of an operation range of the electric motor, giving the speed of the motor as a function of its power; b) then a step of operating the turbine in a power control mode.
F03B 3/10 - Machines or engines of reaction typeParts or details peculiar thereto characterised by having means for functioning alternatively as pumps or turbines
12ii) of the turbine for an operation without cavitation; - data of an operation range of the electric motor, giving the speed of the motor as a function of its power; b) then a step of operating the turbine in a power control mode.
F03B 3/10 - Machines or engines of reaction typeParts or details peculiar thereto characterised by having means for functioning alternatively as pumps or turbines
A conductor bar for a stator winding of a rotating electrical machine includes a bundle of parallel conductor strands extending between two ends of the conductor bar and spaced apart by interspaces. A main insulation is wound around the bundle of conductor strands and a stack separators fills at least part of the interspaces. Protection elements are between the bundle of conductor strands and the main insulation. At least one of the protection elements or the stack separators are configured to compensate, at least in part, thermal expansion of the conductor elements when temperature changes.
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 3/04 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
A runner for a hydraulic machine comprising a band, a crown, a plurality of blades extending between the crown and the band, wherein the runner comprises a plurality of runner segments which together define the runner, each runner segment comprising a band portion, a crown portion and a blade, which portions are integrally formed with one another, each runner segment being attachable to another segment at a band joining edge and a crown joining edge, wherein the band joining edge and the crown joining edge are each spaced apart from the blade of the segment.
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
F15B 11/22 - Synchronisation of the movement of two or more servomotors
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
F15B 15/17 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type of differential-piston type
F16K 3/08 - Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing facesPackings therefor with pivoted closure members in the form of closure plates arranged between supply and discharge passages with circular closure plates rotatable around their centres
F16K 31/122 - Operating meansReleasing devices actuated by fluid the fluid acting on a piston
34.
METHOD FOR DETERMINING A LOCAL MECHANICAL STRAIN OF A RUNNER
The invention concerns a method for determining a mechanical stress of a runner (40), of a hydraulic machine (10), wherein the runner is arranged to rotate around a rotation axis, wherein the hydraulic machine comprises a hydraulic channel delimited by hydraulic surfaces of the runner, the hydraulic surfaces being the surfaces against which a stream of water exerts the forces when the runner is driven in rotation by said stream of water, wherein the runner further comprises a sensor (G) on protected areas positioned away from the hydraulic channel, the method comprises the steps of: a) collecting a physical quantity measured by the sensor (G), b) determining a mechanical stress on a specific location of the hydraulic surface, via a transfer function that correlates the physical quantity measured in step a) and said mechanical stress on the specific location.
The invention concerns a method for determining a mechanical stress of a runner (40), of a hydraulic machine (10), wherein the runner is arranged to rotate around a rotation axis, wherein the hydraulic machine comprises a hydraulic channel delimited by hydraulic surfaces of the runner, the hydraulic surfaces being the surfaces against which a stream of water exerts the forces when the runner is driven in rotation by said stream of water, wherein the runner further comprises a sensor (G) on protected areas positioned away from the hydraulic channel, the method comprises the steps of: a) collecting a physical quantity measured by the sensor (G), b) determining a mechanical stress on a specific location of the hydraulic surface, via a transfer function that correlates the physical quantity measured in step a) and said mechanical stress on the specific location.
An apparatus for modifying the geometry of at least one part of a turbine can include a shell assembly 3 that includes an outer shell that is shaped to modify the shape of a pre-existing element of a turbine. The outer shell 8 of the shell assembly 3 can be composed of a fiber-reinforced polymeric material and can at least partially define an inner cavity. The outer shell 8 can be bonded to a structure to modify the geometrical shape of that structure. Thereafter, a polymer casting 12 can be injected into the inner cavity via at least one injection port attached to the shell assembly. In some embodiments, one or more stiffeners 9 and/or a core 10 can be positioned within the inner cavity to help improve the bonding of the polymer casting 12 to the shell 2 and/or improve a structural property of the apparatus.
F03B 3/18 - Stator bladesGuide conduits or vanes, e.g. adjustable
B29C 39/18 - Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressureApparatus therefor for making articles of indefinite length incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
B29C 45/14 - Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mouldApparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
B29C 70/74 - Moulding material on a relatively small portion of the preformed part, e.g. outsert moulding
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
37.
METHOD FOR DETECTING FATIGUE DAMAGE OF A HYDRAULIC UNIT, AND THE HYDRAULIC UNIT THEREOF
The invention concerns a method for detecting a fatigue undergone on at least one specific location of a hydraulic unit (10), the method being characterized in that the fatigue undergone on the at least on specific location is detected by at least one fatigue indicator (F) said at least one fatigue indicator arranged for being remotely queried via wirings or via a wireless connection.
The invention concerns a hydraulic turbine comprising a runner crown or a hub (1), possibly a band (2), and blades (3) fixed to said crown or hub, or between said band and said crown, and to be actuated in rotation around an axis of rotation, each blade comprising: - a leading edge (8) and a trailing edge (10), - at least one local extension (20) having a first contact surface fixed to the trailing edge of the blade (2), a second contact surface fixed to either said band (6) or said crown (4) and two lateral sides (241, 242) joining at a ridge line (22).
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
F03B 11/04 - Parts or details not provided for in, or of interest apart from, groups for diminishing cavitation or vibration, e.g. balancing
The invention concerns a hydraulic turbine comprising blades (2) fixed to a runner crown (12) and to be actuated in rotation around an axis of rotation, each blade being comprised between a leading edge (8) and a trailing edge (10), a stationary head cover (14) and a chamber (16) being located between said runner crown (12) and said head cover (14) or within the head cover, said runner further comprising: - means (22) forming at least one passage for water between said chamber and a chamber (28) in the runner tip; - an upper portion (121) and a lower portion (122) of the said runner crown, said upper portion (121) having a larger diameter than said lower portion (122) so as to define a channel (24) between them, said channel leading to an exhaust volume (3) of the runner.
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
F03B 11/04 - Parts or details not provided for in, or of interest apart from, groups for diminishing cavitation or vibration, e.g. balancing
A hydraulic turbine includes a rotor with a runner, which is concentrically surrounded by a stator, whereby the runner comprises a plurality of runner blades arranged and distributed in a ring around a rotor axis, and each runner blade extends between a runner crown and a runner band; whereby the stator comprises a plurality of guide vanes arranged and distributed in a ring around the rotor axis, and each guide vane extends between an upper stator ring and a lower stator ring; and whereby a predetermined clearance is provided at least between the runner band and the lower stator ring. A substantial reduction of pressure pulsations in the vane-less gap between said runner blades of said runner is achieved by substantially increasing said predetermined clearance.
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
F03B 11/00 - Parts or details not provided for in, or of interest apart from, groups
F03B 11/04 - Parts or details not provided for in, or of interest apart from, groups for diminishing cavitation or vibration, e.g. balancing
F16J 15/16 - Sealings between relatively-moving surfaces
H02J 3/44 - Synchronising a generator for connection to a network or to another generator with means for ensuring correct phase sequence
F03B 13/00 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
H02K 19/36 - Structural association of synchronous generators with auxiliary electric devices influencing the characteristic of the generator or controlling the generator, e.g. with impedances or switches
The invention concerns a method for coupling to the grid a hydraulic unit (1) having a synchronous generator (2), a runner (6), and wicket gates, the method comprises:a) a step of increasing the flow of water into the runner (6) from a time to to a time ti so that the rotation frequency of the rotor of the synchronous generator (2) is, at time ti equal to the frequency of the grid (3);b) a step of closing the circuit breaker at time ti,step a) further comprises a sub-step al) executed from a time t2 to time ti, wherein the flow of water is adjusted so that, at time ti, the phase of the synchronous generator (2) is aligned with the grid phase.
This invention discloses in particular an actuation cylinder (10) for controlling the movement of a ring-gate (40) of a hydraulic machine, said actuation cylinder (10) comprising a body (18) forming a first chamber (22) provided with a first duct (26) and a second chamber (24) provided with a second duct (28) which are designed to receive an actuating fluid through said first duct (26) and said second duct (28), said chambers being separated from one another by a piston (20) connected to an actuating rod (14) and able to move in said body in a first direction in which the volume of the second chamber increases while the volume of the first chamber decreases, and in a second direction in which the volume of the second chamber decreases while the volume of the first chamber increases, said piston being provided with a rod (30) connected in said second chamber to an area (20b) of the piston turned toward said second chamber, said area (20b) having a surface less than an area (20a) of the piston turned toward the first chamber.
B66F 3/46 - Combinations of several jacks with means for interrelating lifting or lowering movements
F03B 11/00 - Parts or details not provided for in, or of interest apart from, groups
F04D 29/00 - Details, component parts, or accessories
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
46.
Method for operating a hydraulic machine and corresponding installation for converting hydraulic energy into electrical energy
This installation for converting a hydraulic energy into electrical energy comprises a hydraulic adapted to be operated either in a pump mode or in a turbine mode.
It further comprises means (25) for applying an electric torque to the rotor to control the rotation speed of the machine during transitions between the pump mode and the turbine mode.
F03B 15/10 - Regulating, i.e. acting automatically by speed, e.g. by measuring electric frequency or liquid flow without retroactive action
F03B 3/10 - Machines or engines of reaction typeParts or details peculiar thereto characterised by having means for functioning alternatively as pumps or turbines
This method is for orientating the blades (40) of a turbine (4) past a non-reachable range of positions (α1, α2) in a power plant (2), said blades (40) being rotatable around orientation axes (X40) distinct from a rotation axis (X) of the turbine (4), the turbine (4) comprising means (42, 44, 46) for orientating the blades (40), said means being adapted to exert an adjustable torque on the blades (40). The method comprises steps consisting in a) stopping the energy production of the turbine (4), b) setting a water flow which runs the turbine (4) to a value inferior to a normal energy production value, c) rotating the turbine (4) in a motor mode using energy from a grid, d) adjusting the torque delivered by the means for orientating the blades (40) to a reduced value while the turbine (4) is still rotating, so that the blades (40) are free to rotate around their orientation axes (X40), under action of a hydraulic torque exerted by the water, past the non-reachable range of positions, e) once the blades (40) have overcome the non-reachable range of positions, adjusting the torque delivered by the means for orientating the blades (40) to a normal value superior to the reduced value, so that the rotation of the blades (40) around their orientation axis (X40) is stopped in a determined position.
F03B 15/06 - Regulating, i.e. acting automatically
F03B 13/26 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using tide energy
F03B 13/14 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using wave energy
F04D 13/06 - Units comprising pumps and their driving means the pump being electrically driven
48.
Pre-formed plug with inter-blade profiles for hydraulic turbines
The invention concerns an inter-blade profile (14) for a turbine runner blade, said inter-blade profile (14) comprising a profile (16), and a plug (18), forming a basis of the profile (16) and intended for being inserted into a corresponding hole (21) made in a blade.
The invention concerns a rotor for a synchronous generator having a plurality of salient poles regularly disposed on the outer periphery of a rim, each pole comprising a coil with two external terminals said, respectively, first terminal and second terminal, the poles being arranged so that two adjacent poles have either their respective first terminals or their respective second terminals facing each other, the rotor further comprising at least a first connection between first terminals and/or at least a second connection between second terminals, the rotor being characterized in that the first connection and the second connection comprises a plurality of elongated conductive plates whose each ends (A, B) are secured via a single securing mean on facing terminals.
H02K 3/28 - Layout of windings or of connections between windings
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
The invention concerns a removable cover plate (160) for an inter-blade profile (14, 14a) of a turbine runner blade, said cover plate comprising at least one aeration passage (30) and securing means (161) for securing said removable cover plate onto said inter-blade profile (14).
The invention concerns an inter-blade profile (14) for a turbine runner blade, said inter-blade profile (14) comprising a profile (16), and a plug (18), forming a basis of the profile (16) and intended for being inserted into a corresponding hole (21) made in a blade.
A salient pole machine (30) comprises a rotor (20) rotating about a machine axis, said rotor (20) having at its circumference a rotor rim (21) with a predetermined outer radius (29), whereby a plurality of salient poles (22), each extending in radial direction, is attached to said rotor (20) at said rotor rim (21) at a respective pole-rim interface (24).
The mechanical properties of the configuration are improved by providing at said pole-rim interface (24) a plurality of axial rib-like rim extensions (25) projecting radially from said rotor rim (28) with a predetermined circumferential distance (d) between neighboring rim extensions (25), by each salient pole (22) having a plurality of axial pole grooves (26) matching and receiving said rib-like rim extensions (25) at the respective pole-rim interface (24), and by providing fixing elements (27) to fix said rib-like rim extensions (25) in said pole grooves (26).
The invention concerns a reduced-scale model of a turbine comprising a crown (1), a band (2) and blades (3) between said band and said crown, wherein the model is a single bloc assembly of said band, said crown and said blades.
The invention concerns a reduced-scale model of a turbine comprising a crown (1), a band (2) and blades (3) between said band and said crown, wherein the model is a single bloc assembly of said band, said crown and said blades.
A runner (4) for a hydraulic machine comprising a band (20), a crown (22), a plurality of blades (24) extending between the crown (22) and the band (20), wherein the runner (4) comprises a plurality of runner segments (30) which together define the runner (4), each runner segment (30) comprising a band portion (34), a crown portion (32) and a blade (24), which portions are integrally formed with one another, each runner segment (30) being attachable to another segment at a band joining edge (40, 42) and a crown joining edge (36, 38), wherein the band joining edge and the crown joining edge are each spaced apart from the blade of the segment.
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
A runner (4) for a hydraulic machine comprising a band (20), a crown (22), a plurality of blades (24) extending between the crown (22) and the band (20), wherein the runner (4) comprises a plurality of runner segments (30) which together define the runner (4), each runner segment (30) comprising a band portion (34), a crown portion (32) and a blade (24), which portions are integrally formed with one another, each runner segment (30) being attachable to another segment at a band joining edge (40, 42) and a crown joining edge (36, 38), wherein the band joining edge and the crown joining edge are each spaced apart from the blade of the segment.
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
A bearing pad (16) for the bearing of a hydro-generator unit comprises a polymer part (11, 12) and a metal base (14), which are combined to make up said bearing pad (16). Maintenance in case of bearing failure is simplified and accelerated by the polymer part being a separate polymer plate (11, 12), by the metal base being a backing plate (14), and by said polymer plate (11, 12) being removably attached to said backing plate (14).
F16C 17/03 - Sliding-contact bearings for exclusively rotary movement for radial load only with tiltably-supported segments, e.g. Michell bearings
F16C 17/06 - Sliding-contact bearings for exclusively rotary movement for axial load only with tiltably-supported segments, e.g. Michell bearings
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
58.
BEARING PAD FOR A HYDRO-GENERATING UNIT AND HYDRO-GENERATING UNIT WITH SUCH A BEARING PAD
A bearing pad (16) for the bearing of a hydro-generator unit comprises a polymer part (11, 12) and a metal base (14), which are combined to make up said bearing pad (16). Maintenance in case of bearing failure is simplified and accelerated by the polymer part being a separate polymer plate (11, 12), by the metal base being a backing plate (14), and by said polymer plate (11, 12) being removably attached to said backing plate (14).
F16C 17/03 - Sliding-contact bearings for exclusively rotary movement for radial load only with tiltably-supported segments, e.g. Michell bearings
F16C 17/06 - Sliding-contact bearings for exclusively rotary movement for axial load only with tiltably-supported segments, e.g. Michell bearings
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
59.
Tool and method for connecting/disconnecting a runner to/from a shaft assembly
The present invention generally relates to an innovative tool for connecting or disconnecting a runner to/from a shaft assembly. Moreover, the present invention relates to a method for carrying out such operations using the tool. Advantageously, connecting/disconnecting operations can occur without having to work under a suspended load, as the tool may be activated for supporting the runner remotely from a location outside a runner footprint.
F03B 11/00 - Parts or details not provided for in, or of interest apart from, groups
B23P 19/04 - Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformationTools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
B23P 19/00 - Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformationTools or devices therefor so far as not provided for in other classes
60.
IMPROVEMENTS TO HYDRAULIC MACHINES DURING GRID DISCONNECTIONS
Installation for converting hydraulic energy into electrical energy, provided with a fixed speed hydraulic machine comprising a pump- turbine (2) linked to a generator (20) by a shaft. The installation further comprises: an electrical torque actuator (34) to establish a circuit with the generator (20), electrical torque actuator connection means(35) for connecting the generator (20) the electrical torque actuator, and command means (29) for detecting a disconnection of the generator (20) from the grid, and for commanding the electrical torque actuator connection means (35) to connect the generator (20) to the electrical torque actuator (34).
F03B 3/10 - Machines or engines of reaction typeParts or details peculiar thereto characterised by having means for functioning alternatively as pumps or turbines
F03B 15/18 - Regulating, i.e. acting automatically for safety purposes, e.g. preventing overspeed
61.
METHOD FOR OPERATING A HYDRAULIC MACHINE AND CORRESPONDING INSTALLATION FOR CONVERTING HYDRAULIC ENERGY INTO ELECTRICAL ENERGY
This installation for converting a hydraulic energy into electrical energy comprises a hydraulic adapted to be operated either in a pump mode or in a turbine mode. It further comprises means (25) for applying an electric torque to the rotor to control the rotation speed of the machine during transitions between the pump mode and the turbine mode.
F03B 3/10 - Machines or engines of reaction typeParts or details peculiar thereto characterised by having means for functioning alternatively as pumps or turbines
This installation for converting a hydraulic energy into electrical energy comprises a hydraulic adapted to be operated either in a pump mode or in a turbine mode. It further comprises means (25) for applying an electric torque to the rotor to control the rotation speed of the machine during transitions between the pump mode and the turbine mode.
F03B 3/10 - Machines or engines of reaction typeParts or details peculiar thereto characterised by having means for functioning alternatively as pumps or turbines
A salient pole machine (30) comprises a rotor (20) rotating about a machine axis, said rotor (20) having at its circumference a rotor rim (21 ) with a predetermined outer radius (29), whereby a plurality of salient poles (22), each extending in radial direction, is attached to said rotor (20) at said rotor rim (21 ) at a respective pole-rim interface (24). The mechanical properties of the configuration are improved by providing at said pole-rim interface (24) a plurality of axial rib-like rim extensions (25) projecting radially from said rotor rim (28) with a predetermined circumferential distance (d) between neighboring rim extensions (25), by each salient pole (22) having a plurality of axial pole grooves (26) matching and receiving said rib-like rim extensions (25) at the respective pole-rim interface (24), and by providing fixing elements (27) to fix said rib-like rim extensions (25) in said pole grooves (26).
A salient pole machine (30) comprises a rotor (20) rotating about a machine axis, said rotor (20) having at its circumference a rotor rim (21 ) with a predetermined outer radius (29), whereby a plurality of salient poles (22), each extending in radial direction, is attached to said rotor (20) at said rotor rim (21 ) at a respective pole-rim interface (24). The mechanical properties of the configuration are improved by providing at said pole-rim interface (24) a plurality of axial rib-like rim extensions (25) projecting radially from said rotor rim (28) with a predetermined circumferential distance (d) between neighboring rim extensions (25), by each salient pole (22) having a plurality of axial pole grooves (26) matching and receiving said rib-like rim extensions (25) at the respective pole-rim interface (24), and by providing fixing elements (27) to fix said rib-like rim extensions (25) in said pole grooves (26).
This method for stabilizing the rotation speed of a hydraulic machine having S-characteristic and comprising a distributor (9) is adapted to modify a water flow, so that the machine can be coupled to a grid. The method comprises the steps of calculating an orientation of the distributor (9); and orienting the distributor according to the calculated orientation. The method further comprises the steps of providing an electric torque to the machine so as to reach a target speed.
F03B 3/10 - Machines or engines of reaction typeParts or details peculiar thereto characterised by having means for functioning alternatively as pumps or turbines
This method is for orientating the blades (40) of a turbine (4) past a non-reachable range of positions (α1, α2) in a power plant (2), said blades (40) being rotatable around orientation axes (X40) distinct from a rotation axis (X) of the turbine (4), the turbine (4) comprising means (42, 44, 46) for orientating the blades (40), said means being adapted to exert an adjustable torque on the blades (40).The method comprises steps consisting in a) stopping the energy production of the turbine (4), b) setting a water flow which runs the turbine (4) to a value inferior to a normal energy production value, c) rotating the turbine (4) in a motor mode using energy from a grid, d) adjusting the torque delivered by the means for orientating the blades (40) to a reduced value while the turbine (4) is still rotating, so that the blades (40) are free to rotate around their orientation axes (X40), under action of a hydraulic torque exerted by the water, past the non-reachable range of positions, e) once the blades (40) have overcome the non-reachable range of positions, adjusting the torque delivered by the means for orientating the blades (40) to a normal value superior to the reduced value, so that the rotation of the blades (40) around their orientation axis (X40) is stopped in a determined position.
F03B 13/26 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using tide energy
A combined cooling and abrasion particles removal system and method for providing cooling and removing abrasion particles in a contact region between a brush and a slip ring of an electromechanical machine, the system comprising a passage for accommodating the brush and having a front opening adapted to face the slip ring, at least one supply tube with an outlet for blowing a gaseous medium at least partially into a direction towards a free space adjacent to the front opening, and at least one suction tube with an inlet opening for sucking off the gaseous medium and the abrasion particles from the free space. In order to pick up abrasion particles and provide sufficient cooling, the free space merges with a vortex chamber for generating a vortex of the gaseous medium carrying the abrasion particles in operation of the system.
H02K 9/28 - Cooling of commutators, slip-rings or brushes, e.g. by ventilating
H01R 39/48 - Auxiliary means for improving current transfer, or for reducing or preventing sparking or arcing by air blastAuxiliary means for improving current transfer, or for reducing or preventing sparking or arcing by surrounding collector with non-conducting liquid or gas
A hydraulic turbine includes a rotor with a runner, which is concentrically surrounded by a stator, whereby the runner comprises a plurality of runner blades arranged and distributed in a ring around a rotor axis, and each runner blade extends between a runner crown and a runner band; whereby the stator comprises a plurality of guide vanes arranged and distributed in a ring around the rotor axis, and each guide vane extends between an upper stator ring and a lower stator ring; and whereby a predetermined clearance is provided at least between the runner band and the lower stator ring. A substantial reduction of pressure pulsations in the vane-less gap between said runner blades of said runner is achieved by substantially increasing said predetermined clearance.
F03B 3/18 - Stator bladesGuide conduits or vanes, e.g. adjustable
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
F03B 11/00 - Parts or details not provided for in, or of interest apart from, groups
F03B 11/04 - Parts or details not provided for in, or of interest apart from, groups for diminishing cavitation or vibration, e.g. balancing
The rotating machine, comprises a shaft and at least one device for measuring at least the accelerations of the shaft along pitch, yaw and roll axes of the shaft or the angular position of the shaft around the pitch, yaw and roll axes, the or each device being mounted on the shaft.
This method allows determining the operating point of a hydraulic machine in a considered operating range, such as turbine mode, and comprises steps that consist in a) determining two coordinates (N′11, T′11) of a first series of potential operating points of the hydraulic machine for the orientation affected to guide vanes of the machine, b) measuring the rotation speed of the machine, and c) determining the torque exerted by water flow on the machine. The method further includes steps consisting in d) calculating two coordinates (N11, T11) of a second series of potential operating points of the machine in function of the rotation speed (N) measured at step b) and the torque determined at step c), and e) deducing the two coordinates (N11_real, T11_real) of operating point that belongs both to the first and the second series in the said considered operating range of the machine.
F03B 3/18 - Stator bladesGuide conduits or vanes, e.g. adjustable
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
F03B 15/06 - Regulating, i.e. acting automatically
G01B 21/00 - Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
Embodiments of the present invention generally relate to a runner unit of a tidal power plant, and more particularly to a device for reversing a blade of the runner unit. The device according to the embodiments is lighter and more efficient with respect to known solutions which involve articulated mechanisms as it is based on a reversing servomotor including an annular piston which acts on the blade to be reversed.
F15B 15/06 - Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non-rectilinear movement
F03B 3/06 - Machines or engines of reaction typeParts or details peculiar thereto with substantially axial flow throughout rotors, e.g. propeller turbines with adjustable blades, e.g. Kaplan turbines
F03B 13/26 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using tide energy
F15B 15/14 - Fluid-actuated devices for displacing a member from one position to anotherGearing associated therewith characterised by the construction of the motor unit of the straight-cylinder type
72.
TOOL AND METHOD FOR CONNECTING/DISCONNECTING A RUNNER TO/FROM A SHAFT ASSEMBLY
The present invention generally relates to an innovative tool (1) for connecting or disconnecting a runner to/from a shaft assembly. Moreover, the present invention relates to a method for carrying out such operations using the tool (1). Advantageously, connecting/ disconnecting operations can occur without having to work under a suspended load, as the tool (10) may be activated for supporting the runner remotely from a location outside a runner footprint.
B23P 19/04 - Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformationTools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
The present invention generally relates to hydraulic machinery, such as hydraulic turbines. More specifically, the invention is directed to optimising power consumption when the turbine is used in condenser mode. A hydraulic installation comprises a spiral case defining an annular passage with a plurality of wicket gates. One or more pressure sensors are arranged in the spiral case. A runner chamber is in fluid communication with the spiral casing downstream of the wicket gates, and a runner is rotatable in the runner chamber. A draft tube is arranged below the runner, and is in fluid communication with a source of pressurized air. A first connecting element is fluidly connected to the hydraulic circuit and has an end discharging water to atmosphere, or a second connecting element comprising a pump is connected to the hydraulic circuit and discharges in the draft tube.
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
F03B 11/00 - Parts or details not provided for in, or of interest apart from, groups
74.
HYDRAULIC INSTALLATION AND METHOD FOR OPERATING THE SAME
The present invention generally relates to hydraulic machinery, such as hydraulic turbines. More specifically, the invention is directed to optimising power consumption when the turbine is used in condenser mode. The present invention provides a novel hydraulic installation where the reduction of pressure in the spiral case during condenser mode operations is more efficient, limiting the power consumption if compared to state-of-the-art installations.
F03B 11/00 - Parts or details not provided for in, or of interest apart from, groups
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
Aerating system for the runner of a hydraulic turbine, the runner comprising a plurality of blades, such that inter-blade canals are configured between each pair of blades for the admission of air in the water flow circulating through the hydraulic turbine, such that the aerating system comprises at least one hydrofoil located in the inter-blade canal of the runner contacting the pair of blades configuring the inter-blade canal where the hydrofoil is located, such that the hydrofoil has a non-axis symmetrical profile, and such that at least one of the blades in contact with the hydrofoil comprises an aerating canal delivering air to the hydrofoil.
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
F03B 11/00 - Parts or details not provided for in, or of interest apart from, groups
The present invention generally relates to a turbine unit for a hydraulic installation, and more in particular it deals with the hub of the turbine unit. The present invention proposes to provide means for adjusting a gap extent formed between the hub and the inner edge of the blade, this way dramatically increasing the performance of the turbine.
The present invention generally relates to a turbine unit for a hydraulic installation, and more in particular it deals with the hub of the turbine unit. The present invention proposes to provide means for adjusting a gap extent formed between the hub and the inner edge of the blade, this way dramatically increasing the performance of the turbine.
METHOD FOR STABILIZING THE ROTATION SPEED OF A HYDRAULIC MACHINE WITH S-CHARACTERISTICS AND INSTALLATION FOR CONVERTING HYDRAULIC ENERGY INTO ELECTRICAL ENERGY
The method allows stabilizing the rotation speed of a hydraulic machine (20) with S-characteristics. It is implemented by means of a control loop feedback system (1) having a controller (C(s)) for calculating an orientation (Yi) to affect guide vanes (206) of the machine. It includes steps that consist, at each iteration, in calculating a set of internal states (N11, Q11, C11, H, Q) associated to the operating point of the machine, establishing a linearized transfer function in function of the set of internal states, calculating characteristics parameters (Kp, Ti, Td) of the controller in function of the established transfer function so that the control loop feedback system is stable, measuring the rotation speed (N) of the hydraulic machine, comparing the measured rotation speed (N) with a target rotation speed (Nc), and adjusting the orientation affected to the guide vanes accordingly.
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
F03B 3/10 - Machines or engines of reaction typeParts or details peculiar thereto characterised by having means for functioning alternatively as pumps or turbines
The present disclosure relates to a method for fabrication of a conductor bar and to a use of a conductor tape with applied putty for the fabrication of a conductor bar. Described is a method for fabrication of a conductor bar including, applying a putty at one side of a conductor tape, applying a release foil at the other side of the putty opposed to the conductor tape, removing the release foil before applying the conductor tape to the narrow side of the conductor bar, providing a pressing mold with rounded edges at the inner side of the pressing mold, surrounding the conductor bar with putty and conductor tape with the pressing mold, and hot pressing the conductor bar with the pressing mold.
H02K 15/00 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
B29C 43/00 - Compression moulding, i.e. applying external pressure to flow the moulding materialApparatus therefor
H01B 13/00 - Apparatus or processes specially adapted for manufacturing conductors or cables
H02K 15/04 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings prior to their mounting into the machines
H02K 15/10 - Applying solid insulation to windings, stators or rotors, e.g. applying insulating tapes
H02K 15/12 - Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines
B29C 43/18 - Compression moulding, i.e. applying external pressure to flow the moulding materialApparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
B29C 43/36 - Moulds for making articles of definite length, i.e. discrete articles
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 3/40 - Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges
B29K 63/00 - Use of epoxy resins as moulding material
The rotating machine (10), comprises a shaft (26) and at least one device (28) for measuring at least the accelerations of the shaft (26) along pitch (X1), yaw (Y1) and roll (Z1) axes of the shaft (26) or the angular position of the shaft (26) around the pitch (X1), yaw (Y1) and roll (Z1) axes, the or each device (28) being mounted on the shaft (26).
F03B 11/00 - Parts or details not provided for in, or of interest apart from, groups
G01D 5/00 - Mechanical means for transferring the output of a sensing memberMeans for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for convertingTransducers not specially adapted for a specific variable
G01P 3/00 - Measuring linear or angular speedMeasuring differences of linear or angular speeds
G01P 15/18 - Measuring accelerationMeasuring decelerationMeasuring shock, i.e. sudden change of acceleration in two or more dimensions
81.
Method for manufacturing a rotating part of a hydraulic machine, rotating part manufactured according to this method, hydraulic machine and energy conversion installation
A method is disclosed for manufacturing a rotating part which belongs to a hydraulic machine of an installation for converting hydraulic energy into electrical or mechanical energy. This rotating part includes blades distributed about an axis of rotation of the rotating part and extending from a leading edge to a trailing edge. This method can include manufacturing, in steel, a first part of each blade, which defines the leading edge thereof, manufacturing a second part of the blade in a material other than steel and attaching this to the first part of the blade so as to form a trailing edge.
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
F03B 3/04 - Machines or engines of reaction typeParts or details peculiar thereto with substantially axial flow throughout rotors, e.g. propeller turbines
82.
Rotating part of a hydraulic machine, hydraulic machine provided with such a rotating part and installation for converting energy comprising such a machine
When traversed by a flow of water, a hydraulic machine rotating part rotates around an axis of rotation. It includes runners which are distributed around the axis of rotation and each extend between a leading edge and a trailing edge. Each runner can include a first part which defines its leading edge and a second part which is attached to the first part and defines the trailing edge at least in part. The second part can be elastically deformable or displaceable in a reversible manner with respect to the first part, under the action of the flow of water, the second part defining, when the machine operates, the direction of the flow of water downstream of the runner.
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
F03B 3/04 - Machines or engines of reaction typeParts or details peculiar thereto with substantially axial flow throughout rotors, e.g. propeller turbines
The present disclosure relates to an arrangement for manufacturing a head winding cap of an electric machine, comprising a container for accommodating a molding compound, the container is attachable to two winding arms adjacent to a clip connecting the winding arms and enclosing the winding arms, the container projecting perpendicular to the winding arms when attached, and the container creating a tight inclusion for the molding compound, whereas the cap is filled with a dielectric compound.
B29C 39/10 - Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressureApparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
H02K 15/12 - Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines
H02K 3/38 - Windings characterised by the shape, form or construction of the insulation around winding heads, equalising connectors, or connections thereto
B29L 31/34 - Electrical apparatus, e.g. sparking plugs or parts thereof
84.
Device for controlling the movement of a hydraulic cylinder, particularly for hydraulic machines
A control device includes a valve, having a body connected to the first chamber of a cylinder via a first hydraulic connection and to the second chamber of the cylinder via a second hydraulic connection. The control device includes a first hydraulic duct connected to a first actuating-fluid source, and a second hydraulic duct connected to a second actuating-fluid source. The hydraulic ducts communicate with the body of the valve. The valve further includes a distribution device that is movable within the body of the valve, between a first position, in which the distribution device places the first hydraulic connection and the first hydraulic duct in fluid communication, and a second position, in which the distribution device places the second hydraulic connection and the second hydraulic duct in fluid communication.
A hoop including a cylinder which, so that the hoop can be mounted around a shaft, is formed by multiple parts that are assembled together using steps that can produce an assembly without deformation of an external surface of the cylinder. A ring, of which an external surface forms the internal surface of a bearing and which, so that it can be secured to the external wall of the cylinder, is formed by multiple elements that are secured to the cylinder by securing devices that can maintain a machining tolerance of the external surface of the ring.
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
F16C 35/02 - Rigid support of bearing unitsHousings, e.g. caps, covers in the case of sliding-contact bearings
F16C 17/02 - Sliding-contact bearings for exclusively rotary movement for radial load only
F16C 17/14 - Sliding-contact bearings for exclusively rotary movement characterised by features not related to the direction of the load specially adapted for operating in water
This method can be used for refurbishing a facility for converting hydraulic energy into electrical or mechanical energy, and vice versa. The facility includes a Francis type pump-turbine. The pump-turbine includes a runner movable about an axis, a pre-distributor, including stay vanes defining between each pair of two adjacent stay vanes a first water passage channel and a distributor, including guide vanes arranged downstream of the stay vanes in the direction of water flow feeding the pump-turbine operating in turbine mode. The guide vanes define between each pair of two adjacent guide vanes a second water passage channel. This method includes steps of reducing the height, taken parallel to the axis of rotation of the runner, of the first water passage channels and reducing the height, taken parallel to the axis of rotation of the runner, of the second water passage channels.
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
F03B 3/18 - Stator bladesGuide conduits or vanes, e.g. adjustable
The invention proceeds from a rotating electric machine, in particular a double-fed induction machine in the power range between 20 MVA and 500 MVA, which comprises a rotor that rotates about a machine axis, is concentrically surrounded by a stator, and has a rotor plate body and a shaft, which rotor plate body bears a rotor winding that is arranged further outwards and is connected by means of connectors to slip rings that are arranged further inwards at the end of the shaft. A flexible and secure connection is achieved in that the connectors have mechanical connectors that run at right angles to the shaft to absorb forces arising owing to centrifugal acceleration, which mechanical connectors are connected on one side to a rotor winding head of the rotor winding and are supported on the other side on an auxiliary rim on the rotor plate body.
H02K 1/22 - Rotating parts of the magnetic circuit
H02K 13/00 - Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windingsDisposition of current collectors in motors or generatorsArrangements for improving commutation
H02K 3/46 - Fastening of windings on the stator or rotor structure
H02K 1/06 - Details of the magnetic circuit characterised by the shape, form or construction
H02K 3/51 - Fastening of winding heads, equalising connectors, or connections thereto applicable to rotors only
H02K 17/22 - Asynchronous induction motors having rotors with windings connected to slip-rings
88.
Power-conversion installation including a hydraulic machine provided with a runner
The invention relates to a Francis runner (200) for a hydraulic machine, comprising: a wheel (1), which is rotationally symmetrical about an axis of rotation (Z) of the runner (200); a crown (12); and a plurality of inwardly curved vanes (21), each of which has a peripheral edge (212). The peripheral edge (212) of at least one of the vanes is curved, the concavity thereof facing toward the outside of the runner (200). The maximum value of the distance measured between any point on the peripheral edge (202) and a straight line passing through a first connection point between the peripheral edge (212) and the wheel (1), and through a second connection point between the peripheral edge (212) and the crown (12), is at an intermediate point on the peripheral edge (212). The radius (Rn) from the intermediate point (N) is strictly smaller than the radius (Ra) from the first connection point (A). The radius (Rn) from the intermediate point (N) is strictly smaller than the radius (Rc) from the second connection point (C).
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
The invention relates to a control device (16) that includes a valve (26) including a body (30) connected to the first chamber (22) of a cylinder (6) via a first hydraulic connection (32) and to the second chamber (24) of the cylinder (6) via a second hydraulic connection (34). The device includes a first hydraulic duct (42) to be connected to a first actuating-fluid source (40), and a second hydraulic duct (46) to be connected to a second actuating-fluid source (44), said hydraulic ducts (42, 46) being in communication with the body (30) of the valve (26), said valve (26) further including a distribution device (56) that is movable within the body (30) of the valve (26), between a first position, in which the distribution device (56) places the first hydraulic connection (32) and the first hydraulic duct (42) in fluid communication, and a second position in which the distribution device (56) places the second hydraulic connection (34) and the second hydraulic duct (46) in fluid communication.
The rotor for an electric machine comprises a shaft, a spider on the shaft, a laminated drum on the spider. The spider has a plurality of apart elements defining ducts between each other. The laminated drum has a plurality of cooling channels connected to the ducts. The rotor also has throttle elements associated to at least one duct and/or cooling channel.
H02K 9/02 - Arrangements for cooling or ventilating by ambient air flowing through the machine
H02K 1/32 - Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
H02K 15/00 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
H02K 15/02 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
91.
Device for controlling the movement of a ring gate of a hydraulic machine and hydraulic machine comprising such a device
A device controls the movement of a ring gate of a hydraulic machine between an open position and a blockage position. The device includes at least four cylinders, the rods of which are suitable for being connected to the ring gate at locations located on a perimeter of the ring gate. The device also includes at least two hydraulic members for synchronizing pistons, the hydraulic synchronization members being connected to the cylinders such as to form at least two groups. Each group encompasses at least two cylinders connected by at least one hydraulic synchronization member, two cylinders belonging to two separate groups not being connected by a hydraulic synchronization member.
A rotating electric machine includes a rotor, having a rotor laminate stack extending in the direction of a machine axis and having a rotor winding, the rotor winding forming a winding head at each of the ends of the rotor laminate stack, said winding head being fastened to a winding head rim, which is arranged concentrically within the winding head and adjoins the rotor laminate stack in the axial direction, in order to intercept centrifugal forces by means of bolts passing radially through the winding head, and a fastening designed to safely absorb axial expansions of the winding head. Simple and secure fastening is achieved by virtue of the bolts being fastened to the winding head rim in each case on a T-shaped hammer profile, which extends in the axial direction and is mounted in axially movable fashion in an associated axial T-shaped slot in the winding head rim.
A rotating electric machine, e.g. hydrogenerator, includes a rotor, including a rotor laminate stack extending in a machine axis direction and having a rotor winding which forms a winding head at each of the ends of the rotor laminate stack. The winding head is fastened to a winding head rim, which is arranged concentrically within the winding head and adjoins the rotor laminate stack in the axial direction, to intercept centrifugal forces by bolts passing radially through the winding head, and a fastening designed to safely absorb axial expansions of the winding head. Simple and secure fastening is achieved by the bolts being fastened to the winding head rim in each case on a T-shaped hammer profile, which extends axially and is mounted, axially movable, in a T-shaped groove in the winding head rim, additional couplers are provided that transmit axial expansions of the winding head onto the hammer profile.
An insulating cap is provided for an end winding of an electrical machine working at a high voltage, the end winding including a plurality of insulated winding bars protruding from respective winding slots and electrically conductively connected to one another in pairs at their ends so as to form a plurality of electrical connections. The cap includes an opening allowing the insulating cap to be pushed over a region of one of the electrical connections such that the insulating cap insulates an outside of the electrical connection. An interior includes a layer configured to gradually dissipate a high electrical field in the region of the electrical connection to an outside of the insulating cap, the outside of the insulating cap being at earth potential.
H02K 11/00 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
H01B 17/06 - Fastening of insulator to support, to conductor, or to adjoining insulator
H02K 3/38 - Windings characterised by the shape, form or construction of the insulation around winding heads, equalising connectors, or connections thereto
H02K 3/40 - Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges
The invention relates to a Francis runner (200) for a hydraulic machine, comprising: a wheel (1), which is rotationally symmetrical about an axis of rotation (Z) of the runner (200); a crown (12); and a plurality of inwardly curved vanes (21), each of which has a peripheral edge (212). The peripheral edge (212) of at least one of the vanes is curved, the concavity thereof facing toward the outside of the runner (200). The maximum value of the distance measured between any point on the peripheral edge (202) and a straight line passing through a first connection point between the peripheral edge (212) and the wheel (1), and through a second connection point between the peripheral edge (212) and the crown (12), is at an intermediate point on the peripheral edge (212). The radius (Rn) from the intermediate point (N) is strictly smaller than the radius (Ra) from the first connection point (A). The radius (Rn) from the intermediate point (N) is strictly smaller than the radius (Rc) from the second connection point (C).
F03B 3/02 - Machines or engines of reaction typeParts or details peculiar thereto with radial flow at high-pressure side and axial flow at low-pressure side of rotors, e.g. Francis turbines
A slip-ring arrangement of a rotating electrical machine includes a plurality of slip-rings disposed concentrically about an axis of the electrical machine one behind the other in an axial direction, the plurality of slip-rings configured to be self-supporting.
H02K 9/28 - Cooling of commutators, slip-rings or brushes, e.g. by ventilating
H02K 13/00 - Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windingsDisposition of current collectors in motors or generatorsArrangements for improving commutation
A rotating electrical machine includes a rotor configured to rotate about an axis. The rotor includes a rotor lamination stack having a plurality of sheets pressed into a composite assembly in an axial direction and being radially divided into an inner mechanical part and an outer electrical part. A rotor winding is disposed in the electrical part of the rotor lamination stack. A stator is concentrically surrounding the rotor. A plurality of shear bolts is disposed in the mechanical part and configured to reach through the rotor lamination stack. A plurality of further bolts is disposed in the electrical part, the plurality of shear bolts and a plurality of further bolts being configured to press the plurality of sheets in the axial direction.
A rotating electric machine includes a rotor configured to rotate about an axis. The rotor includes a rotor laminate stack having layered laminations pressed in an axial direction to form a composite, the rotor laminate stack being radially divided into an inner mechanical region and an outer electrical region. A rotor winding is disposed in the electrical region of the rotor laminate stack. A stator concentrically surrounds the rotor. A press plate is configured to press the layered laminations in the axial direction, the press plate being radially divided into a separate inner press plate and a separate outer press plate so as to correspond to the radial division of the rotor laminate stack.
An air-cooled motor-generator (10) includes a rotor (34) with a rotor shaft (11), which is arranged rotatably about a machine axis (15) and on which a rotor winding (16) is arranged, and a stator (35) with a stator laminate stack (18) and a stator winding (17) arranged therein, which concentrically surrounds the rotor winding (16) A closed cooling circuit operating with cooling air (24) is provided, with the cooling air in the cooling circuit flowing through the rotor winding (16) and the stator winding (17) radially from the inside outwards, the cooling air being cooled in coolers (19) arranged outside the stator (35) and being fed back to the rotor (34). Cooling which can be changed before or during operation is achieved in a simple manner by virtue of the fact that adjustable throttle devices are provided for adjusting the volume flow of the cooling air in the cooling circuit at the coolers (19).
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
F28F 27/02 - Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
F28D 21/00 - Heat-exchange apparatus not covered by any of the groups
100.
DEVICE FOR CONTROLLING THE MOVEMENT OF A RING GATE OF A HYDRAULIC MACHINE AND HYDRAULIC MACHINE COMPRISING SUCH A DEVICE
The invention relates to a device (1), which controls the movement of a ring gate (2) of a hydraulic machine between an open position and a blockage position. The device (1) includes at least four cylinders (11, 12, 21, 22, 31, 32), the rods (11.3, 12.3) of which are suitable for being connected to the ring gate (2) at locations located on a perimeter (C2) of the ring gate (2). The device (1) also includes at least two hydraulic members (10.1, 20.1, 30.1) for synchronising pistons (11.4, 12.4), the hydraulic synchronisation members (10.1, 20.1, 30.1) being connected to the cylinders (11, 12, 21, 22, 31, 32) such as to form at least two groups (10, 20, 30). Each group (10, 20, 30) encompasses at least two cylinders (11-12, 21-22, 31-32) connected by at least one hydraulic synchronisation member (10.1, 20.1, 30.1), two cylinders (11, 21, 31, 12, 22, 32) belonging to two separate groups (10, 20, 30) not being connected by a hydraulic synchronisation member (10.1, 20.1, 30.1).
