The invention relates to an improved oil-lubricated compressor having at least one compressor stage (2) with a housing (3) comprising a rotor (4) in a compressor chamber (13), wherein the inner wall (5) of the compressor chamber has at least one oil pocket (9) with at least two oil pocket portions (11, 12, "stepped oil pocket"), and wherein the one or more oil pockets extend along the periphery of the inner wall of the compressor chamber, and the oil pocket portions differ in terms of their flow cross-section.
F01C 1/32 - Rotary-piston machines or engines having the characteristics covered by two or more of groups , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in group and relative reciprocation between the co-operating members
F04C 18/32 - Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups , , , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in group and relative reciprocation between the co-operating members
F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
The invention relates to an improved oil-lubricated rotary vane vacuum pump having a rotor (4) in a rotary vane chamber (13), wherein the inner wall of the rotary vane chamber (13) has at least one oil pocket (9) with at least two oil pocket portions (11, 12), and the oil pocket portions (11, 12) differ in terms of their flow cross-section.
F01C 1/32 - Rotary-piston machines or engines having the characteristics covered by two or more of groups , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in group and relative reciprocation between the co-operating members
F04C 18/32 - Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups , , , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in group and relative reciprocation between the co-operating members
F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
The invention relates to a gas deoiling element (1), in particular an air deoiling element, and to an oil separation and reconditioning device (3) comprising said gas deoiling element, for separating oil droplets from a gas such as preferably air, wherein a cross-sectional constriction, for example in the form of an aperture (2), is arranged in the region in which the gas-oil mixture enters the gas deoiling element. The invention also relates to an oil-lubricated rotary vane vacuum pump (4) which has a gas deoiling element (1) according to the invention, whereby the service life of the plain bearings is lengthened; to a method for operating the oil-lubricated rotary vane vacuum pump (4) according to the invention; to a method for exchanging the gas deoiling element (1) in said oil-lubricated rotary vane vacuum pump (4); to the use of a cross-sectional constriction, in particular an aperture, in a gas deoiling element according to the invention in order to lengthen the service life of the plain bearing in an oil-lubricated rotary vane vacuum pump; and to the use of a gas deoiling element according to the invention in an oil-lubricated rotary vane vacuum pump in order to lengthen the service life of the plain bearing.
F04C 18/344 - Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups , , , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group or and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
F04C 25/02 - Adaptations for special use of pumps for elastic fluids for producing high vacuum
A sliding vane rotary pump (1) for conveying a fluid, with a housing (2), with a rotor receiving chamber (3), and with a lubricant chamber (14). An eccentrically arranged rotor (4) is provided in a rotor receiving chamber (3) in such a way that at least one conveying chamber (11) arises, the volume of which varies cyclically during a rotation of the rotor (4). Furthermore, the sliding vane rotary pump (1) has an intake duct (12) for feeding the fluid to be conveyed into the conveying chamber (11), and an ejection duct (13) for ejecting the fluid to be conveyed from the conveying chamber (11) in the direction of the lubricant chamber (14), wherein a valve device (21) is provided between the ejection duct (13) and the lubricant chamber (14), in order to prevent a backflow of fluid from the lubricant chamber (14) into the conveying chamber (11). Furthermore, the ejection duct (13) is arranged in such a way that it opens into the lubricant chamber (14). Furthermore, the sliding vane rotary pump (1) has at least one venting duct (26) which is connected with a conveying chamber end (28) fluidically to the conveying chamber (11) and with a venting end (27) fluidically to a space outside the conveying chamber (11), and at least one equalization duct (29) which is connected with a conveying chamber end (31) fluidically to the conveying chamber (11) and with an equalization end (30) fluidically to the lubricant chamber (14). Here, in an operating state of the sliding vane rotary pump (1), the equalization end (30) opens below the lubricant level (24) into the lubricant chamber (14) and, in a rest state of the sliding vane rotary pump (1), opens above the lubricant level (34) into the lubricant chamber (14).
F04C 18/344 - Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups , , , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group or and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
F04C 25/02 - Adaptations for special use of pumps for elastic fluids for producing high vacuum
The present invention relates to an adapter element (11) for a holding device for an air de-oiling element of a vacuum pump (1), comprising a first cylindrical portion (11a) having a first diameter and a second cylindrical portion (11b) having a second diameter and adapted to receive the air de-oiling element (2), whereby the first diameter is equal to or smaller than the second diameter and whereby the second cylindrical portion (11b) has circumferential recesses which form at least three fixing fingers (11e) aligned parallel to the longitudinal axis of the adapter element and distributed uniformly or non-uniformly over the circumference of the second cylindrical section (11b), wherein at least two fixing fingers (11f) are mounted so as to be elastically radially displaceable. The present invention also relates to a holding device (10) for an air de-oiling element (2) of a vacuum pump (1), in particular an oil vacuum pump.
A dry rotary pump for recirculating an at least partially gaseous composition containing hydrogen. The dry rotary pump comprising a first rotating shaft and a second rotating shaft. The first rotating shaft and the second rotating shaft are driven in rotation by a drive system in a gear chamber. The dry rotary pump comprises a first pair of seals and a second pair of seals, each comprising a first shaft seal and a second shaft seal. The dry rotary pump comprises a pressure equalization chamber in fluid connection with a gap between the first shaft seal and the second shaft seal to regulate pressure in the gap. The gear chamber is in fluid connection with the gap, and the pumping chamber is in fluid connection with the first shaft seal and the first shaft seal by a pulsation attenuation chamber.
F04C 18/12 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
F04C 27/00 - Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
F04C 29/00 - Component parts, details, or accessories, of pumps or pumping installations specially adapted for elastic fluids, not provided for in groups
The present invention relates to an adapter element (11) for a holding device for an air de-oiling element of a vacuum pump (1), comprising a first cylindrical portion (11a) having a first diameter and a second cylindrical portion (11b) having a second diameter and adapted to receive the air de-oiling element (2), whereby the first diameter is equal to or smaller than the second diameter and whereby the second cylindrical portion (11b) has circumferential recesses which form at least three fixing fingers (11e) aligned parallel to the longitudinal axis of the adapter element and distributed uniformly or non-uniformly over the circumference of the second cylindrical section (11b), wherein at least two fixing fingers (11f) are mounted so as to be elastically radially displaceable. The present invention also relates to a holding device (10) for an air de-oiling element (2) of a vacuum pump (1), in particular an oil vacuum pump.
The present invention relates to an adapter element (11) for a retaining device for an air/oil separator of a vacuum pump (1), comprising a first cylindrical portion (11a) having a first diameter and a second cylindrical portion (11b) having a second diameter, which second cylindrical portion is designed to receive the air/oil separator (2); wherein the first diameter is less than or equal to the second diameter; and wherein the second cylindrical portion (11b) has peripherally extending cutouts, which form at least three fastening fingers (11e), which fastening fingers are oriented parallel to the longitudinal axis of the adapter element and are distributed evenly or unevenly over the circumference of the second cylindrical portion (11b), at least two fastening fingers (11f) being mounted such that they are elastically radially movable. The present invention also relates to a retaining device (10) for an air/oil separator (2) of a vacuum pump (1), more particularly an oil vacuum pump.
The present invention relates to a device (1, 30) for recirculating an at least partially gaseous composition containing hydrogen, wherein the device (1, 30) is a dry rotary pump comprising a first rotary shaft (13) and a second rotary shaft (14) respectively driving a first piston with jaws (8) and a second piston with jaws (9) rotating in a pumping chamber (2) comprising an inlet orifice (11) and an outlet orifice (10) for the gaseous composition, the first rotary shaft (13) and the second rotary shaft (14) being configured to be rotated by a drive system (17, 18) located in a gear chamber (4), wherein the device (1, 30) comprises a first pair of seals (19) and a second pair of seals (20), each comprising a first seal (19a, 20a) and a second shaft seal (19b, 20b), the first pair of seals (19) being provided around the first rotary shaft (13) and the second pair of seals (20) being provided around the second rotary shaft (14) between the pumping chamber (2) and the gear chamber (4), wherein the device (1, 30) comprises a pressure equalising chamber (25) that is fluidly connected to a gap (24) present between the first shaft seal (19a, 20a) and the second shaft seal (19b, 20b) of the first and the second pair of shaft seals (19, 20) to regulate the pressure in the gap (24), wherein the gear chamber (4) is fluidly connected to the gap (24), and wherein the pumping chamber (2) is fluidly connected to the first shaft seal (19a) of the first pair of shaft seals (19) and to the first shaft seal (20a) of the second pair of shaft seals (20) by means of a pulse attenuation chamber (22). The present invention also relates to a fuel cell system (40, 50, 60, 70, 80, 90) comprising a recirculation device according to the present invention.
F01C 17/02 - Arrangements for drive of co-operating members, e.g. for rotary piston and casing of toothed-gearing type
F01C 19/00 - Sealing arrangements in rotary-piston machines or engines
F04C 2/12 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
F04C 15/00 - Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups
10.
DEVICE FOR RECIRCULATING AN AT LEAST PARTIALLY GASEOUS COMPOSITION CONTAINING HYDROGEN AND FUEL CELL SYSTEM
The present invention relates to a device (1, 30) for recirculating an at least partially gaseous composition containing hydrogen, wherein the device (1, 30) is a dry rotary pump comprising a first rotary shaft (13) and a second rotary shaft (14) respectively driving a first piston with jaws (8) and a second piston with jaws (9) rotating in a pumping chamber (2) comprising an inlet orifice (11) and an outlet orifice (10) for the gaseous composition, the first rotary shaft (13) and the second rotary shaft (14) being configured to be rotated by a drive system (17, 18) located in a gear chamber (4), wherein the device (1, 30) comprises a first pair of seals (19) and a second pair of seals (20), each comprising a first seal (19a, 20a) and a second shaft seal (19b, 20b), the first pair of seals (19) being provided around the first rotary shaft (13) and the second pair of seals (20) being provided around the second rotary shaft (14) between the pumping chamber (2) and the gear chamber (4), wherein the device (1, 30) comprises a pressure equalising chamber (25) that is fluidly connected to a gap (24) present between the first shaft seal (19a, 20a) and the second shaft seal (19b, 20b) of the first and the second pair of shaft seals (19, 20) to regulate the pressure in the gap (24), wherein the gear chamber (4) is fluidly connected to the gap (24), and wherein the pumping chamber (2) is fluidly connected to the first shaft seal (19a) of the first pair of shaft seals (19) and to the first shaft seal (20a) of the second pair of shaft seals (20) by means of a pulse attenuation chamber (22). The present invention also relates to a fuel cell system (40, 50, 60, 70, 80, 90) comprising a recirculation device according to the present invention.
F01C 17/02 - Arrangements for drive of co-operating members, e.g. for rotary piston and casing of toothed-gearing type
F04C 2/12 - Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
11.
MULTI-LEVEL ROTARY PISTON VACUUM PUMP OR COMPRESSOR
In a multi-level rotary piston vacuum pump or compressor, having at least two rotors (6, 7) in the form of rotary pistons, being disposed in a housing (1) on parallel shafts (5, 8) in a rotationally fixed manner, being synchronized counter-rotatable at a ratio of 1:1, each consisting of at least two partial disks (12, 13; 14, 15, etc.) engaging into each other in pairs, the arrangement is such that at least two partial disks (12, 14; 13, 15, etc.) of each rotary piston (6, 7) are configured as one piece, i.e. are manufactured of a single workpiece such upon positioning the individual partial disks of each rotor behind one another a single thread graduation and a sealed working chamber (3.1, 3.2) being closed in itself are formed by means of a cycloidal configuration of the connection surfaces between the shell surface and the core surface of each partial disk, which has a control opening (2) that is configured on the suction side for controlling the gas filling, and has a control opening (4) that is configured on the pressure side for controlling the gas compression.
F04C 18/12 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
F04C 23/00 - Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
12.
ROTATING-SLIDE VACUUM PUMP OR COMPRESSOR OF BLOCK DESIGN HAVING A DISC-ROTOR SYNCHRONOUS MOTOR WHICH IS MOUNTED ON FLYING BEARINGS
In a rotating-slide vacuum pump or compressor having a rotor (6) which can rotate in a housing (2) and is driven by a drive shaft, and having slides (8) which can be moved outwards in the circumferential direction herein in slots (7) in the rotor (6) and separate individual feed chambers of a working area (9), which is provided with an intake opening (1) and an outlet opening, from one another, and each assume a maximum outer position adjacent to the housing inner wall, driven by centrifugal force, the arrangement is designed such that a brushless disc-rotor synchronous motor (11, 12) is fitted in the axial direction to the rotor shaft.
F04C 18/344 - Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups , , , , , or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group or and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
In a dry-running twin-shaft vacuum pump or compressor having two parallel shafts and positive-displacement rotors (2, 3; 17, 18; 23, 24) which are arranged on said shafts and which are located in a working space and which are synchronized in the ratio 1:1, for example mechanically by means of a transmission or electronically by means of one drive motor per rotor shaft, and which have an intake opening (1) on their suction side and at least one outlet opening (16) on their pressure side, the arrangement is configured such that each shaft (4, 5) of the positive-displacement rotors has an axially running cavity which extends at least over a partial length of the shaft, in which cavity in each case at least one heat tube (8, 9) is arranged in such a way that the compression heat from the positive-displacement rotors is dissipated out of the working space via the shafts, and is if appropriate conducted to an adjoining sealing space, and outside the working space, is dissipated out of the machine by heat dissipation means.
F04C 18/16 - Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
patents
