EP0249657B1 - Dispositif comportant une pompe à palettes - Google Patents

Dispositif comportant une pompe à palettes Download PDF

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Publication number
EP0249657B1
EP0249657B1 EP86116750A EP86116750A EP0249657B1 EP 0249657 B1 EP0249657 B1 EP 0249657B1 EP 86116750 A EP86116750 A EP 86116750A EP 86116750 A EP86116750 A EP 86116750A EP 0249657 B1 EP0249657 B1 EP 0249657B1
Authority
EP
European Patent Office
Prior art keywords
chamber
channel
cylinder
medium
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP86116750A
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German (de)
English (en)
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EP0249657A2 (fr
EP0249657A3 (en
Inventor
Richard Jurr
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Mannesmann VDO AG
Original Assignee
Mannesmann VDO AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mannesmann VDO AG filed Critical Mannesmann VDO AG
Publication of EP0249657A2 publication Critical patent/EP0249657A2/fr
Publication of EP0249657A3 publication Critical patent/EP0249657A3/de
Application granted granted Critical
Publication of EP0249657B1 publication Critical patent/EP0249657B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/04—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for reversible pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, 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 F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, 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 F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C18/3446—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, 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 F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along more than one line or surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/06—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation

Definitions

  • the invention relates to a device with a vane pump, which has a rotor rotatably mounted in a housing to form two pump chambers two passages are provided for connection to at least one consumer and to a room containing a medium to be conveyed.
  • vane pumps are part of the prior art. From document DE-A-3 430 353, a vane pump with a rotor coaxially seated on the shaft is known, the housing of which has an essentially elliptical interior, on the inner wall of which the vanes, which are mounted in a radial sliding manner in the rotor, rest under the effect of the centrifuge force , so that two operating chambers are formed, each with its own inlets and outlets.
  • the two independent operating or pump chambers can be used for simultaneous delivery different media can be used.
  • a rotating compressor based on the same principle allows either the parallel connection of both pump chambers to increase the delivery volume or the series connection to increase the pressure.
  • Vane pumps of the construction described above which are also called vane pumps, are often used for over- or. Vacuum generation used in motor vehicles in order to supply and actuate central locking systems, child safety devices or locking aids as required with overpressure or underpressure.
  • the individual consumers, which can be actuated with overpressure or underpressure, are connected to the wing cell pump via lines.
  • the invention has for its object to develop a device of the type described in such a way that it is suitable for generating overpressure and underpressure with little effort and that after standstill a pressure equalization between the consumers and the space with the medium to be conveyed can take place .
  • the rotor can be driven in two different directions of rotation, that two passages are provided in the wall of the second pump chamber, each of which is connected to a cylinder chamber of a first and second Horl cylinder, that the hollow cylinders have displaceable pistons that are additionally acted upon by the overpressure or underpressure supplied to the consumers that the piston in the first cylinder can be displaced into a position releasing a passage opening in the hollow cylinder into the space with the medium to be conveyed by the pressure generated by the vane pump for consumers in the absence of control pressure. and that the piston of the second hollow cylinder is displaceable under the negative pressure generated by the vane pump for the consumer in a channel in the space with the medium to be conveyed position.
  • a control pressure is always generated as overpressure.
  • the control pressure is used to actuate certain elements of the motor vehicle, for. B. the central locking system.
  • the control pressure is used to move the pistons into their positions blocking the passages to the space for the medium to be conveyed. There is no control pressure when the rotor is at a standstill.
  • the overpressure or underpressure applied to the consumers moves the pistons of the first or second cavity into their positions which release the respective outlets for pressure equalization. Due to the rapid pressure equalization after the rotor has come to a standstill, the rotor can be actuated for a renewed actuation of the elements of the motor vehicle, for. B. the central locking, the locking aids or the like can be started again. There is therefore no waiting time for the actuation of these motor vehicle elements.
  • the device described above can be used for elements that are operated with positive or negative pressure.
  • the consumers are to be connected to the corresponding passage of the first pump chamber, coordinating the direction of rotation of the rotor. It is also possible to connect consumers, which react to both positive and negative pressure in a predetermined manner, to the one passage of the pump chamber.
  • the device can therefore be used in many ways.
  • the second pump chamber via a channel on the one hand with the cylinder chamber of the first hollow cylinder and on the other hand with a valve which can be closed in the direction of the room with the medium to be conveyed by the control pressure is connected so that the second pump chamber continues to be closed via a channel on the one hand with the cylinder chamber of the second hollow cylinder and on the other hand with one in the direction of the room with the medium to be blocked by the control pressure Valve is connected, and that a further cylinder chamber in the first hollow cylinder is connected to the first pump chamber and to a cavity in which the end of the piston, designed as a stepped piston, of the second hollow cylinder is arranged, which has a second cylinder chamber which is open on one side and contains the mouth of a channel running to the cavity, which is blocked in an end position of the stepped piston.
  • This device has particular advantages if the medium to be conveyed is air which is removed from the atmosphere.
  • the cylinders can then be connected to the surrounding atmosphere via short channels in the walls.
  • the valves connected to the second pump chamber also open into the atmosphere at a connection. Only little space is required for the hollow cylinders and the channels between the two pump chambers.
  • the second pump chamber preferably has a smaller volume than the first pump chamber.
  • the second pump chamber is only required for the generation of the control pressure with which no large-volume elements are moved. Therefore, a relatively small second chamber is also sufficient for the generation of a high control pressure.
  • a relatively large volume of the first pump chamber is thus available for the conveyance of the medium from or to the consumers, so that despite the second pump chamber, a large volume of the medium can be conveyed with a corresponding overpressure or underpressure.
  • the hollow cylinders and cavities for the valves are preferably arranged in the wall of the housing as radial bores or bores parallel to the axis of rotation of the rotor.
  • the vane pump forms a unit with the elements for pressure equalization, which can be easily manufactured. The effort for installation in the respective motor vehicle is also low.
  • the valves are e.g. B. flutter valves.
  • the forces which are decisive for the displacement can be adjusted to the pressure ratios between control pressure, positive or negative pressure such that the negative pressure generated by the first pump chamber for the consumer and with the control pressure present assumes the end position blocking the pressure compensation.
  • the first piston it is advantageous to also design the first piston as a stepped piston.
  • a device for the optional generation of a negative pressure or positive pressure and a control pressure contains a vane pump 10 which has a housing 12 in which a rotor 14 which can be driven by a motor (not shown in more detail) is rotatably mounted.
  • the housing 12 there is a cylindrical cavity with a larger cross section than the cross section of the rotor 14.
  • the rotor 14 is arranged eccentrically to this cavity, which forms a first pump chamber 16.
  • the subspaces 20, 22 each contain a passage 24, 26 for connection to consumers, not shown, or to the space of a medium to be conveyed.
  • consumers not shown
  • the medium to be pumped can be a gas, e.g. B. air act.
  • the medium to be pumped is a liquid, for example oil, which is located in a tank, not shown, which is under atmospheric air pressure, to which the pipeline 30 runs, the end of which is not shown in all operating positions of the consumers in immerses the liquid level.
  • a second cavity which is cylindrical and which partially overlaps the first cavity.
  • the rotor 14 is also arranged eccentrically to this cavity, which is not described in any more detail and has a larger diameter than the rotor 14.
  • a second pump chamber 32 is formed which extends from the inner wall of the Housing 12, the outside of the rotor 14 and the end walls, not shown, of the vane pump 10 is enclosed.
  • the pump chamber 32 has two subspaces 34, 36 with respect to the plane of symmetry 18, just like the pump chamber 16. Each subspace 34, 36 contains passages 38 and 40, respectively.
  • the rotor 14 contains radially extending recesses 42 which are arranged at equal distances from one another. In the recesses 42 wings 44 are mounted radially. The blades 44 come into contact or interaction with the rotation of the rotor 14 with the inner wall of the housing, their ends sliding along the inner wall and forming separate compartments into which the medium to be conveyed is sucked in during the rotation of the rotor 14 and then put under pressure. The pressurized medium is discharged through a passage.
  • the passage 38 is connected via a channel 46 to a variable volume cylinder chamber 48 of a first hollow cylinder 50 in which piston 52 is slidably disposed.
  • the piston 52 divides the hollow cylinder 50 into the first cylinder chamber 48 and a second cylinder chamber 54, which can also be changed in volume, and is connected to the pipeline 28 via a channel 56 opening into a circular cylindrical end wall 60 of the hollow cylinder 50.
  • the channel 46 opens into the other circular cylindrical end wall 62 of the hollow cylinder 50.
  • a sealing ring 58 At the mouth of the channel 56 there is a sealing ring 58.
  • the passage opening 64 is provided close to the end wall 60 in a zone which is not designated and which is separated from the cylindrical piston 52 in its first end position delimited by the end wall 60 is covered.
  • the passage opening 64 is the same as that Passage opening 24 opens into the space for the medium to be conveyed, in the first end position of the piston 52, which is shown in Fig. 1, sealed.
  • the other passage opening 66 leads to actuating elements, not shown, which are acted upon by the control pressure.
  • a channel section 68 branches off from the channel 46 to a valve 70 which blocks when the control pressure in the channel 46 is present.
  • a second hollow cylinder 72 contains a stepped piston 74 which projects with its stepped end 76 into a cylindrical cavity 78.
  • the end 76 is my piston ring seal 80.
  • the stepped piston 74 divides the interior of the hollow cylinder 72 into a first cylinder chamber 82 and a second cylinder chamber 84, the volume of which can be varied depending on the position of the stepped piston 74.
  • the chamber 82 is adjacent to the cavity 78.
  • the cylinder chamber 84 is open on its circular cylindrical end to the atmosphere.
  • a channel 86 connects the chamber 82 to the passage 40. From the channel 86, a channel piece 88 branches off to a valve 90 which blocks the channel 88 when the control pressure is present.
  • the second cylinder chamber 84 is connected to the cavity 78 via a channel 92. Close to its end wall opposite end 76, cavity 78 is connected to pipeline 28 via passage 94 and channel 96.
  • the pump chambers 16 and 32 are dimensioned in coordination with the connected actuating elements so that the control pressure is somewhat greater than the pressure applied to the consumers.
  • arrows indicate the two opposite directions of rotation 98 and 100.
  • the medium When the rotor 14 rotates in the direction of rotation 98, the medium is sucked in via the pipeline 30 and the passage 24, compressed in the chamber 16 and fed under pressure via the passage 26 into the pipeline 28 to which the consumers are connected. A negative pressure occurs at the passage 24. Consumers, e.g. B. central locking devices, locking aids and the like devices in motor vehicles are operated so that they assume a certain operating position or pass into this operating position.
  • a negative pressure is created in the sub-space 32, which propagates through the passage 40, so that the valve 88 opens and establishes a connection to the space containing the medium to be conveyed, from which this medium is sucked in.
  • the medium enters the pump chamber 32, is compressed in the partial chamber 34 and passes under pressure through the passage 38 into the channel 46, via which it acts on the end face of the piston 52 in the cylinder chamber 48.
  • the overpressure acting in the pipeline 28 propagates into the cylinder chamber 54 and acts on the piston 52 on its other end face. Due to the pressurization, the piston 52 moves into the end position shown in FIG. 1, in which the mouth of the passage opening 64 in the cylinder chamber 54 is covered.
  • the pressure in the pipeline 28 also propagates into the cavity 78 and acts on the end 76 of the stepped piston 74.
  • the stepped piston 74 moves into the end position shown in FIG. 1, in which the mouth of the channel 92 into the chamber 84 is covered.
  • the control pressure drops immediately.
  • the consumer pressure still present in the pipeline 28 shifts the piston 52 into its other end position, in which the passage opening 64 is released.
  • the pressure in the pipeline 28 drops to the pressure below which the conveying medium is. If this is not air, it is usually under atmospheric pressure. The device is again available for the build-up of the control pressure and the pressure for the consumers.
  • a partial vacuum is created in the subspace 22, which propagates to the consumers via the passage 26 and the pipeline 28 and at least partially sucks the medium out of the latter.
  • the medium is pressurized via the subspace 20 and through the passage 24 and the pipe 30 into the space with the medium, for. B. a tank.
  • the consumers can therefore be relieved of the negative pressure or put into another operating position or transferred into this.
  • underpressure 34 is created in the subspace 34 and propagates through the passage 38 into the channel 46.
  • the valve 70 is opened by the negative pressure, so that medium is sucked into the subspace 34 via the channel 46 and the passage 38.
  • the medium is compressed in the sub-space 36 and passes through the passage 40 and the channel 86 with the valve 88 being blocked into the chamber 82, in which it acts on the annular end face of the stepped piston 74.
  • the stepped piston 74 is moved by means of the control pressure into the end position shown in FIG. 1, in which the opening of the channel 92 into the chamber 84 is covered.
  • the piston 52 assumes the end position shown in FIG. 1 due to the negative pressure in the cylinder chamber 54.
  • the control pressure drops immediately. This eliminates the pressure in the cylinder chamber 82. Due to the negative pressure acting in the cavity 78, the stepped piston 74 is moved into its other end position in which the annular end face bears against the end wall of the cylinder chamber 82. Here, the mouth of the channel 92 is released so that the negative pressure in the cavity 78 is compensated for by the pressure in the atmosphere. The device is then available again for the actuation of the connected consumers by driving the rotor 14.
  • valves, cavities and control elements are arranged in the wall of the housing 12 of the vane pump 10. Identical elements in FIGS. 1 and 2 are provided with the same reference symbols.
  • the subspace 34 of the second pump chamber 32 is connected via a channel 102 to a cavity 104 in which there is a flap valve 106 which is connected via a passage opening 108 to the elements to be actuated by the control pressure in the motor vehicle.
  • the cavity 104 is connected via a channel 110 to the hollow cylinder 50, in which the piston 52 is movably arranged.
  • the passage opening 64 is located in the wall of the housing 12.
  • the channel 56 extends in the housing wall up to a branching point 114, from which the passage opening 26, the pipeline 28 and the channel 96 extend.
  • the hollow cylinder 72 is also located in the housing 12 and has a passage opening 116 to the atmosphere at the end of the chamber 72.
  • a channel 118 runs from the subspace 36 to a cavity 120 in which there is a flutter valve 122, the passage opening 124 of which is connected to the consumers for the control pressure.
  • the cavity 120 is connected to the cylinder chamber 82 via the channel 86.
  • the device shown in Fig. 2 operates in the manner described above in connection with Fig. 1.
  • the channels 46 and 86 can each be connected to a common channel, not shown, via a further valve, not shown, which is in the opposite direction blocking the valve 70 or 90, respectively to which the control pressure consumers are connected.
  • the cavities 104, 120 shown in FIG. 2 and the hollow cylinders 50 and 72 are preferably not arranged in the manner shown but rather radially or axially parallel to the axis of rotation of the rotor 14 in the housing 12 as bores.
  • the channels 102, 110, 56, 96, 86 are constructed as far as possible from radial and axially parallel sections as bores. This means that the channels and cavities can largely be produced using holes. Therefore, simple manufacture is possible.
  • FIG 3 shows, as an example, the hollow cylinder 50 with the piston 52, which is arranged axially parallel to the axis of rotation of the rotor 14.
  • the hollow cylinder 50 is closed at one end by a cover 126, which has a central opening (not designated in more detail) for the channel 46.
  • the flutter valves 106 and 122 can be omitted if the piston 52 and the stepped piston 74 are designed accordingly.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Claims (9)

  1. Dispositif comprenant une pompe (10) multicellulaire à palettes, qui présente un rotor (14) monté mobile en rotation dans un carter (12) en constituant deux chambres (16, 32) de pompe, lequel rotor comporte des évidements (42) dans lesquels sont disposés des palettes (44) mobiles radialement, agissant en interaction avec la paroi intérieure du carter (12), tandis qu'il est prévu dans la paroi du premier corps ou de la première chambre (16) de pompe, deux passages (24, 26) à relier respectivement à au moins un organe consommateur et à une chambre contenant un fluide à refouler,
    dispositif caractérisé en ce que
    le rotor (14) peut être entraîné dans deux sens de rotation différents ; en ce qu' il est prévu dans la paroi de la deuxième chambre de pompe deux passages (38, 40),, qui sont respectivement reliés à une chambre cylindrique (48, 82) d'un premier et d'un deuxième cylindre creux (50, 72) ; en ce que les cylindres creux (50, 72) présentent des pistons (52, 74) mobiles, qui sont soumis en outre à l'action de la surpression ou de la dépression amenée aux organes consommateurs ; en ce que le piston (52) du premier cylindre creux (50) est, en l'absence de pression de commande, et au moyen de la pression produite pour les organes consommateurs par la pompe (10) multicellulaire à palettes, déplaçable à une position qui libère une ouverture (64) de passage dans le cylindre creux (50) de la chambre contenant le fluide à refouler et en ce que le piston (74) du deuxième cylindre creux (72) est,sous l'effet de la dépression produite pour les organes consommateurs, déplaçable à une position qui libère un canal (92) dans la chambre contenant le fluide à refouler.
  2. Dispositif selon la revendication 1, caractérisé en ce que la deuxième chambre (32) de pompe est reliée par un canal (46) d'une part à la chambre cylindrique (48) du premier cylindre creux (50) et d'autre part par une soupape (70) pouvant être fermée par la pression de commande en direction de la chambre contenant le fluide à refouler ; en ce que la deuxième chambre (32) de pompe est en outre reliée par un canal (86) d'une part à la chambre cylindrique (82) du deuxième cylindre creux (72) et d'autre part par une soupape (90) pouvant être fermée par la pression de commande en direction de la chambre contenant le fluide à refouler, et en ce qu'une autre chambre cylindrique (54), aménagée dans le premier cylindre creux,est reliée à la première chambre (16) de pompe et à une cavité (78) dans laquelle est disposée l'extrémité (76) du piston du deuxième cylindre creux (72), constitué par un piston (74) à gradins, présentant une deuxième chambre cylindrique (84), ouverte d'un côté et comportant le débouché d'un canal (92) s'étendant vers la cavité (78) qui est fermée dans une position extrême du piston (74) étagé et est ouvert dans l'autre position extrême.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le fluide à refouler est de l'air.
  4. Dispositif selon l'une des revendications qui précèdent, caractérisé en ce que la deuxième chambre (32) de pompe a un moindre volume que la première chambre (16) de pompe.
  5. Dispositif selon l'une des revendications qui précèdent, caractérisé en ce que les cylindres creux (50, 72) et les cavités (104, 120) aménagées pour les soupapes dans la paroi du carter (12) sont constitué(e)s par des alésages radiaux ou dont les axes sont parallèles à l'axe de rotation du rotor (14).
  6. Dispositif selon l'une des revendications qui précèdent, caractérisé en ce que les soupapes sont constituées par des soupapes flottantes (106, 122).
  7. Dispositif selon l'une des revendications qui précèdent, caractérisé en ce que l'extrémité (76) du piston étagé (74) présente une garniture (80) d'étanchéité de piston.
  8. Dispositif selon l'une des revendications qui précèdent, caractérisé en ce qu'un canal (56) débouchant dans une des chambres cylindriques (54) dans la paroi frontale (60) du cylindre creux (50), et qui est alimenté par la première chambre (16) de pompe, présente à son embouchure une bague (58) d'étanchéité.
  9. Dispositif selon l'une des revendications qui précèdent, caractérisé en ce que les canaux (462 86) reliés à la deuxième chambre (32) de pompe sont respectivement reliés au canal de pression de commande, par une autre soupape s'ouvrant sous l'effet de la pression de commande en direction d'un canal de pression de commande commun.
EP86116750A 1986-06-18 1986-12-02 Dispositif comportant une pompe à palettes Expired - Lifetime EP0249657B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863620393 DE3620393A1 (de) 1986-06-18 1986-06-18 Vorrichtung mit einer fluegelzellenpumpe
DE3620393 1986-06-18

Publications (3)

Publication Number Publication Date
EP0249657A2 EP0249657A2 (fr) 1987-12-23
EP0249657A3 EP0249657A3 (en) 1989-04-26
EP0249657B1 true EP0249657B1 (fr) 1991-03-06

Family

ID=6303201

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86116750A Expired - Lifetime EP0249657B1 (fr) 1986-06-18 1986-12-02 Dispositif comportant une pompe à palettes

Country Status (4)

Country Link
EP (1) EP0249657B1 (fr)
JP (1) JPS6355386A (fr)
BR (1) BR8701746A (fr)
DE (2) DE3620393A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8123506B2 (en) * 2008-05-29 2012-02-28 Flsmidth A/S Rotary sliding vane compressor with a secondary compressed fluid inlet
DE102012220608B3 (de) * 2012-11-13 2013-11-14 Joma-Polytec Gmbh Pumpenvorrichtung
CN112648181B (zh) * 2020-12-04 2022-04-01 江苏湖润泵业科技有限公司 具有内凹式叶片的叶片泵

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2831631A (en) * 1953-07-27 1958-04-22 Petersen Entpr Rotary compressor
GB863162A (en) * 1956-09-21 1961-03-15 Scaife Company Rotary gas compressor pump
US4247267A (en) * 1978-10-18 1981-01-27 Sid Harvey, Inc. Valve controlled reversible pump
DE3430353A1 (de) * 1983-08-20 1985-03-07 Mitsubishi Denki K.K., Tokio/Tokyo Fluegelzellenpumpe

Also Published As

Publication number Publication date
EP0249657A2 (fr) 1987-12-23
DE3677976D1 (de) 1991-04-11
EP0249657A3 (en) 1989-04-26
JPS6355386A (ja) 1988-03-09
BR8701746A (pt) 1988-02-09
DE3620393A1 (de) 1987-12-23

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