EP1890040B1 - Pompe à vide - Google Patents

Pompe à vide Download PDF

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Publication number
EP1890040B1
EP1890040B1 EP07022290A EP07022290A EP1890040B1 EP 1890040 B1 EP1890040 B1 EP 1890040B1 EP 07022290 A EP07022290 A EP 07022290A EP 07022290 A EP07022290 A EP 07022290A EP 1890040 B1 EP1890040 B1 EP 1890040B1
Authority
EP
European Patent Office
Prior art keywords
area
rotor
housing
pump
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
EP07022290A
Other languages
German (de)
English (en)
Other versions
EP1890040A3 (fr
EP1890040A2 (fr
Inventor
Dieter Otto
Ulrich Hiltemann
Andreas Moje
Antonio Pace
Ulrich Pabst
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Magna Powertrain Hueckeswagen GmbH
Original Assignee
Ixetic Hueckeswagen GmbH
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 Ixetic Hueckeswagen GmbH filed Critical Ixetic Hueckeswagen GmbH
Publication of EP1890040A2 publication Critical patent/EP1890040A2/fr
Publication of EP1890040A3 publication Critical patent/EP1890040A3/fr
Application granted granted Critical
Publication of EP1890040B1 publication Critical patent/EP1890040B1/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
    • F04C28/28—Safety arrangements; Monitoring
    • 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
    • F04C18/3441—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 one line or continuous surface substantially parallel to the axis of rotation
    • 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
    • F04C2220/00—Application
    • F04C2220/10—Vacuum
    • 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
    • F04C2250/00—Geometry
    • F04C2250/10—Geometry of the inlet or outlet
    • F04C2250/101—Geometry of the inlet or outlet of the inlet

Definitions

  • the invention relates to a vacuum pump, in particular for automotive brake boosters, wherein the pump is normally driven by the automotive internal combustion engine in a rotational direction ("forward"). Accordingly, the vacuum pumps have a fixed direction of rotation. Such vacuum pumps are known.
  • Such pumps are normally driven by the automotive internal combustion engine in a rotational ("forward") direction, the vacuum pump having a device which serves to prevent damage during reverse rotation.
  • Such pumps are for example from the EP-A-0439672 known and correspond to the preamble of claim 1.
  • this known device has an outlet valve for the residual oil to the cylinder head of the internal combustion engine.
  • an additional valve is provided, which opens a path for the oil to the cylinder head backwards.
  • this check valve is closed and does not allow air to flow from the cylinder head as external air into the pump.
  • this valve is combined with the pump outlet valve, so that a spring plate valve has two tongues and is secured with a screw.
  • the object of the invention is to present an improved vacuum pump.
  • a vacuum pump in which a device having the features of claim 1 has a bypass device for the residual oil.
  • a bypass device designed as a pivoting wing mounted, which is positioned in the region of a Schmiegespaltes.
  • the swing wing abuts the rotor, which can be caused by a pressure difference and / or a spring force.
  • the pressure in front of the wing causes the swinging wing to lift, thus clearing the way for the residual oil, either to the cylinder head or to the other wing side.
  • the pivoting pad device is used in a pump with a Monoeriel without moving caps, because the monoeriel then always rests by the centrifugal force on the opposite side and thus has no contact with the swing wing.
  • the pivoting wing is preferably designed as a plastic part, but can also be designed as a sheet metal part and can be shown either pivotally or elastically deformable.
  • a vacuum pump in which the device has a bypass groove.
  • a bypass groove in the housing and / or lid is arranged in the region of the air inlet opening, so the suction nozzle. This bypass allows the residual oil to flow back past the wing, avoiding pressure spikes due to residual oil being forced backwards.
  • the invention describes a vacuum pump in which the device has a storage volume for residual oil. Pressure peaks through the residual oil can thus be avoided by the remaining oil is pushed into the storage volume during reverse rotation of the pump, so that the pump can rotate without residual oil in front of the wing and thus without squeezing oil backwards.
  • This memory is to be housed in the pump housing.
  • Another known pump is characterized in that the device has a bypass in the lid.
  • a pressure-dependent bypass is integrated in the lid of the pump, which opens at elevated pressure in front of the intake valve and drain oil from this area in the other pump chamber and / or the rotor inner bore leaves.
  • This bypass can be designed as a resilient sheet, which lies on the inside of the lid and which can be pushed away under pressure load at least partially into corresponding recesses of the lid.
  • the bypass can be designed as a piston in the lid.
  • a vacuum pump in which the rotor has a clamping roller freewheel, which in one direction of rotation (“forward"), the connection between the rotor and drive element, such as a clutch blocks, ie jams, and in the opposite direction of rotation (“backwards”) allows the drive element to be fritted without the rotor engaging in reverse rotation.
  • the freewheel can be pressed onto the rotor, wherein the known slide bearing between the rotor and the pump housing is replaced by the roller bearing of the clamping roller freewheel.
  • FIG. 1a is a perspective view of a known vacuum pump 1 is shown.
  • the vacuum pump has a housing 3 in which an eccentrically arranged rotor with a monoeriel is not visible here.
  • Such vacuum pumps are known in their construction and function and should therefore not be further explained.
  • the direction of rotation of the rotor is represented by an arrow 5, so that it can be seen that increases in this direction of rotation in the region 7, the delivery volume upon rotation of the rotor and thus leads to suction and in the area 9 of the pump, the delivery volume and reduced thus leading to the ejection of the conveyor.
  • the conveyor is thus sucked in the area 7 via a suction nozzle 11 and then ejected when exceeding the top dead center and the reduction of the delivery volume in the area 9 via an outlet valve 13.
  • an additional valve 15 is arranged, which opens during reverse rotation to the cylinder head and thereby can drain the residual oil in this area, that is analogous to how normally the outlet valve 13 behaves in normal conveying direction 5.
  • the outlet valve 15 remains closed for the residual oil, since builds up in the region 7 negative pressure and therefore the tongue pressure in the cylinder head keeps the reed valve 15 closed.
  • the valve 15 for the reverse run is combined with the pump outlet valve 13, so that a spring plate valve has two tongues and is secured with a screw 17.
  • FIG. 1b the corresponding individual parts of the valves are shown in disassembled state.
  • the spring 17 secures the pressurized state, the pump outlet opening 27, while the spring tongue 25 of the reverse flow valve 15, the outlet opening 29th
  • the spring tongue 23 of the Pumpenaustrittventils 13 closes the hold-tongue 19 and the spring tongue valve 23 of the pump outlet valve 13 and the spring tongue closes in normal direction of rotation of the pump.
  • FIG. 2 a bypass device according to the invention for the residual oil during reverse rotation is shown in the form of a swing-wing device.
  • a rotor 30, which is shown simplified here without the monoeriel is arranged eccentrically in a housing 32.
  • the housing 32 has a recess 34 in which a pivoting device 36 is arranged.
  • the swing-wing device 36 abuts the rotor 38 in the area 38.
  • the direction of rotation of the rotor in normal operation is with the Arrow 40 indicated. In normal operation, therefore, the pivoting leaf seals against the rotor, wherein the pressure zone of the vacuum pump is in the region 48 and the suction zone of the vacuum pump is in the region 50.
  • the rotor and the housing can have an approximately equal radius of curvature over an angular range ⁇ , here denoted by the reference number 46 between the housing 32 and the rotor 30, so that a good Schmiegespaltabdichtung even then is present when the swinging wing performs its real safety function in reverse.
  • This crevice seal also prevents pressure spikes from lifting the mono wing. In reverse, so the suction area 50 is suddenly the pressure range, which can then build a pressure peak in this area by the reverse crushed squeeze oil. However, this pressure peak is then relieved by opening the pivoting vane 36 in the area 42 which is connected to the cylinder head area.
  • the pressure in the cylinder head region which corresponds approximately to the atmospheric pressure, normally prevails.
  • a monoeriel is used without moving caps in a pump with this swing-wing device, because the monoeriel then always rests by the centrifugal force on the opposite side and thus has no contact with the swing wing 36.
  • the pivoting blade 36 itself can be pressed against the rotor 30 in a sealing manner by a spring force 44 as well as by the pressure force of the pressure in the region 42.
  • FIG. 3 is shown as a known reverse-flow relief device, a bypass groove 54 on the back 52 of the pump housing 3.
  • the bypass groove 54 is arranged in the suction region of the pump and thus in the region of the suction nozzle 11. Opposite is the outlet opening 56 of the outlet valve when the pump is rotated in the normal direction of rotation 40. Runs the pump when reversing the engine the other way round, so the squeezing oil can be displaced by the bypass groove 54 laterally past the wing to the rear, thereby avoiding the build-up of pressure peaks.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Rotary Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Claims (4)

  1. Pompe à vide à palettes pour des servofreins de véhicules automobiles, ladite pompe comportant un carter (32) et un rotor (30) qui en service normal est entraîné dans un sens de rotation ("marche avant") par un moteur à combustion interne de véhicule automobile, avec un dispositif d'évitement des dommages en cas de rotation en sens inverse, avec un secteur (48) d'une zone de refoulement et un secteur (50) d'une zone d'aspiration, caractérisée en ce qu'un mécanisme à palette oscillante est disposé dans un secteur (38) du carter (32) entre le secteur (48) de la zone de refoulement et le secteur (50) de la zone d'aspiration, et comporte un renflement (34) du carter (32) et une palette oscillante (36), laquelle est serrée hermétiquement contre le rotor en service normal, dans le sens de rotation (40) du rotor (30), l'huile résiduelle présente dans la pompe étant refoulée dans un volume d'un secteur (42) à l'intérieur du renflement (34) du carter (32) par rotation en sens inverse, un pic de pression étant diminué par l'huile refoulée en arrière lors de la marche arrière par ouverture de la palette oscillante (36) dans le secteur (42).
  2. Pompe à vide à palettes selon la revendication 1, caractérisée en ce que la palette oscillante (36) est serrée hermétiquement contre le rotor (30) par la force élastique d'un ressort (44) et/ou par la force de compression de la pression dans le secteur (42).
  3. Pompe à vide à palettes selon la revendication 1 ou la revendication 2, caractérisée en ce que dans un secteur de fente minimale entre le rotor (30) et le carter (32), le rotor (30) et le carter (32) présentent sensiblement le même rayon de courbure sur une plage angulaire a (46), de telle manière qu'une étanchéité satisfaisante de la fente minimale est présentée même lorsque la palette oscillante remplit sa fonction de sécurité proprement dite en marche arrière.
  4. Pompe à vide à palettes selon la revendication 1, la revendication 2 ou la revendication 3, caractérisée en ce que le secteur (42) est relié à un secteur de culasse de cylindre où règne une pression sensiblement atmosphérique.
EP07022290A 2002-11-13 2003-11-12 Pompe à vide Expired - Lifetime EP1890040B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10252769 2002-11-13
EP03779691A EP1563190A2 (fr) 2002-11-13 2003-11-12 Pompe a vide

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP03779691.9 Division 2003-11-12
EP03779691A Division EP1563190A2 (fr) 2002-11-13 2003-11-12 Pompe a vide

Publications (3)

Publication Number Publication Date
EP1890040A2 EP1890040A2 (fr) 2008-02-20
EP1890040A3 EP1890040A3 (fr) 2008-02-27
EP1890040B1 true EP1890040B1 (fr) 2012-06-27

Family

ID=32308526

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07022290A Expired - Lifetime EP1890040B1 (fr) 2002-11-13 2003-11-12 Pompe à vide
EP03779691A Withdrawn EP1563190A2 (fr) 2002-11-13 2003-11-12 Pompe a vide

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP03779691A Withdrawn EP1563190A2 (fr) 2002-11-13 2003-11-12 Pompe a vide

Country Status (4)

Country Link
EP (2) EP1890040B1 (fr)
AU (1) AU2003287863A1 (fr)
DE (1) DE10393279D2 (fr)
WO (1) WO2004044431A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8469684B2 (en) 2005-07-07 2013-06-25 Oerlikon Leybold Vacuum Gmbh Rotary vacuum pump with a discharge compensating channel
US11306718B2 (en) 2016-11-03 2022-04-19 Taiho Kogyo Co., Ltd. Vane pump
US11346343B2 (en) 2016-11-03 2022-05-31 Taiho Kogyo Co., Ltd. Vane pump including pressure relief groove

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004034922B4 (de) * 2004-07-09 2006-05-11 Joma-Hydromechanic Gmbh Einflügelvakuumpumpe
DE102004034926B3 (de) * 2004-07-09 2005-12-29 Joma-Hydromechanic Gmbh Einflügelvakuumpumpe
WO2006122515A1 (fr) * 2005-05-19 2006-11-23 Ixetic Hückeswagen Gmbh Pompe comportant un accouplement a friction a roue libre
DE112007001540B4 (de) * 2006-07-21 2016-05-12 Magna Powertrain Hückeswagen GmbH Vakuumpumpe
DE102007010729B3 (de) * 2007-01-04 2008-04-24 Joma-Polytec Kunststofftechnik Gmbh Vakuumpumpe
DE102007018247A1 (de) * 2007-04-12 2008-10-16 Joma-Hydromechanic Gmbh Vakuumpumpe
DE102009016048B4 (de) * 2009-04-02 2018-05-30 Bayerische Motoren Werke Aktiengesellschaft Pumpe für eine Kraftfahrzeug-Brennkraftmaschine sowie Kraftfahrzeug-Brennkraftmaschine mit Pumpe
GB0907607D0 (en) * 2009-05-01 2009-06-10 Wabco Automotive Uk Ltd Vacuum pump
DE102010026032A1 (de) * 2010-07-03 2012-01-05 Mahle International Gmbh Flatterventil und Drehschieberpumpe
ITTO20131083A1 (it) 2013-12-30 2015-07-01 Vhit Spa Pompa rotativa con valvola di sicurezza e metodo di funzionamento
DE102016202426A1 (de) * 2016-02-17 2017-08-17 Mahle International Gmbh Rückschlagventil für eine Vakuumpumpe
DE102016207115A1 (de) * 2016-04-27 2017-11-02 Mahle International Gmbh Rückschlagventil für eine Vakuumpumpe
DE102016207123A1 (de) * 2016-04-27 2017-11-02 Mahle International Gmbh Rückschlagventil für eine Vakuumpumpe
DE102016122903A1 (de) * 2016-11-28 2018-05-30 Schwäbische Hüttenwerke Automotive GmbH Gaspumpe mit Ölrückführung
DE102017123695A1 (de) * 2017-10-11 2019-04-11 Schwäbische Hüttenwerke Automotive GmbH Rotationspumpe
DE102017128972A1 (de) * 2017-12-06 2019-06-06 Joma-Polytec Gmbh Vakuumpumpe
DE102020111301A1 (de) * 2020-04-24 2021-10-28 Schwäbische Hüttenwerke Automotive GmbH Vakuumpumpe

Family Cites Families (12)

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Publication number Priority date Publication date Assignee Title
DE1926797A1 (de) * 1969-05-24 1970-11-26 Gerspach Dr Phil Wolfram Vakuumrueckschlagventil,insbesondere fuer Bremskraftverstaerker 100000
CH553332A (de) * 1972-06-13 1974-08-30 Burckhardt Ag Maschf Einrichtung zur regulierung des arbeitsmitteldruckes in einer fluessigkeitsringpumpe.
DE2613472A1 (de) * 1976-03-30 1977-10-13 Hori Technical Lab Ltd Trockenlaufender verdichter
DE2629337C2 (de) * 1976-06-30 1986-08-07 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Flügelzellenvakuumpumpe
JPS61109975A (ja) * 1984-11-02 1986-05-28 Hitachi Koki Co Ltd 浮子式油逆流防止器
DE3618301A1 (de) * 1985-06-05 1986-12-18 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Vakuumpumpe
EP0255920B1 (fr) * 1986-08-06 1990-09-26 B a r m a g AG Pompe à vide à palettes
DE4019854B4 (de) * 1989-07-10 2004-09-16 Saurer Gmbh & Co. Kg Flügelzellen-Vakuumpumpe
DE4002771A1 (de) * 1990-01-31 1991-08-01 Vdo Schindling Unterdruckversorgungsanlage
EP0515929B1 (fr) * 1991-05-29 1998-07-29 LuK Automobiltechnik GmbH & Co. KG Pompe à vide à palettes montée sur le boítier d'un moteur d'un véhicule à moteur
JP2891047B2 (ja) 1993-08-05 1999-05-17 株式会社日立製作所 ベーン式真空ポンプ
JP2000205159A (ja) 1999-01-11 2000-07-25 Hitachi Ltd ベ―ン式真空ポンプ

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8469684B2 (en) 2005-07-07 2013-06-25 Oerlikon Leybold Vacuum Gmbh Rotary vacuum pump with a discharge compensating channel
US9017051B2 (en) 2005-07-07 2015-04-28 Oerlikon Leybold Vacuum Gmbh Rotary vacuum pump with a discharge compensating channel
US11306718B2 (en) 2016-11-03 2022-04-19 Taiho Kogyo Co., Ltd. Vane pump
US11346343B2 (en) 2016-11-03 2022-05-31 Taiho Kogyo Co., Ltd. Vane pump including pressure relief groove

Also Published As

Publication number Publication date
EP1890040A3 (fr) 2008-02-27
EP1563190A2 (fr) 2005-08-17
AU2003287863A8 (en) 2004-06-03
WO2004044431A3 (fr) 2004-09-16
WO2004044431A2 (fr) 2004-05-27
AU2003287863A1 (en) 2004-06-03
EP1890040A2 (fr) 2008-02-20
DE10393279D2 (de) 2005-06-02

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