WO2009018906A1 - Pompe à vide - Google Patents

Pompe à vide Download PDF

Info

Publication number
WO2009018906A1
WO2009018906A1 PCT/EP2008/005824 EP2008005824W WO2009018906A1 WO 2009018906 A1 WO2009018906 A1 WO 2009018906A1 EP 2008005824 W EP2008005824 W EP 2008005824W WO 2009018906 A1 WO2009018906 A1 WO 2009018906A1
Authority
WO
WIPO (PCT)
Prior art keywords
vacuum pump
spring
zusatzauslassquerschnitt
flat
check valve
Prior art date
Application number
PCT/EP2008/005824
Other languages
German (de)
English (en)
Inventor
Robert Deipenwisch
Reinhard Plietsch
Gunther Lorenz
Original Assignee
Ixetic Hückeswagen 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 Hückeswagen Gmbh filed Critical Ixetic Hückeswagen Gmbh
Priority to DE112008001967T priority Critical patent/DE112008001967A5/de
Publication of WO2009018906A1 publication Critical patent/WO2009018906A1/fr

Links

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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
    • F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
    • F04C29/128—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type of the elastic type, e.g. reed valves
    • 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

Definitions

  • the invention relates to a vacuum pump, in particular a vane pump, having a rotor which is arranged rotatably around a rotation axis in a housing which has at least one inlet opening and at least one outlet opening which is equipped with a check valve.
  • the object of the invention is to provide a vacuum pump, in particular a rotary vane pump, with a rotor, which is arranged rotatably about a rotation axis in a housing having at least one inlet opening and at least one outlet opening, which is equipped with a check valve, the cost can be produced and has a long service life.
  • the power consumption of the vacuum pump is to be reduced during operation.
  • the object is in a vacuum pump, in particular a paddle roller pump, with a rotor which is arranged rotatably about a rotation axis in a housing having at least one inlet opening and at least one outlet opening, which is equipped with a check valve, achieved in that the check valve a Hauptauslassquerêt which is released depending on the pressure in front of the outlet opening alone or together with a soirauslassquerites.
  • the check valve serves to reduce the power consumption of the vacuum pump.
  • Both outlet sections are normally closed and open depending on the pressure. During normal operation of the vacuum pump, an air-oil mixture is preferably expelled through the main outlet section while the additional outlet section is closed. When pressure peaks occur, the additional outlet cross section is opened in addition to the main outlet cross section.
  • the vacuum pump is preferably a single-blade pump with a vane.
  • the pressure in front of the outlet opening is the pressure in a pressure chamber inside the vacuum pump.
  • a preferred embodiment of the vacuum pump is characterized in that the Hauptauslassquerites is located closer to a bottom dead center than the Rajauslassquerites. This arrangement has a positive effect on the efficiency of the vacuum pump, since the pressure prevailing outside of the vacuum pump atmospheric pressure passes relatively late through the open check valve in the vacuum pump.
  • the check valve is designed as a spring valve.
  • the spring valve comprises at least one flat-form spring element with which the outlet cross-sections can be closed individually or together.
  • Another preferred exemplary embodiment of the vacuum pump is characterized in that the main outlet cross section and the additional outlet cross section are integrated in a common non-return valve. This simplifies the manufacture of the vacuum pump.
  • a further preferred embodiment of the vacuum pump is characterized in that the check valve comprises a main flat-form spring which covers both the main outlet cross-section and the additional outlet cross-section and an additional flat-shape spring which covers only the additional outlet cross-section.
  • the main flat-forming spring is arranged between the two outlet cross-sections and the additional flat-form spring.
  • a further preferred exemplary embodiment of the vacuum pump is characterized in that the non-return valve comprises a flat-form spring which covers both the main outlet cross-section and the additional outlet cross-section and has a spring stiffness decreasing away from a clamping point.
  • the stiffer region of the Fiachformfeder covers the beautiassquerexcellent and the less rigid end of the flat form spring from the Hauptauslassquerrough.
  • a further preferred embodiment of the vacuum pump is characterized in that the flat shape spring tapers away from the clamping point.
  • the tapered flat shape spring is made of plastic.
  • a further preferred exemplary embodiment of the vacuum pump is characterized in that the flat-form spring has a main section which has the main outlet cross-section covers and, in particular by a constriction, is integrally connected to an additional portion covering the soirauslassquerites.
  • the additional portion is arranged closer to a clamping point of the flat form spring than the main portion.
  • a further preferred embodiment of the vacuum pump is characterized in that the check valve comprises a main flat-form spring, which includes the Feldauslassquerexcellent and the Vietnameseauslassquerexcellent covers, and an additional flat-form spring, which covers the beautlassquerexcellent and the Schoauslassquerexcellent.
  • the Feldflachformfeder is arranged with the Feldauslassquerexcellent between the Rajauslassquerexcellent and the Vietnameseflachformfeder.
  • a further preferred embodiment of the vacuum pump is characterized in that the rotor is equipped with at least one wing, which divides a working space in the housing into a suction chamber and a pressure chamber.
  • the structure and function of a vane pump are known.
  • the housing can be made in one or more parts.
  • Figure 1 is a schematic representation of a vacuum pump according to a first
  • Figure 2 is a similar view as in Figure 1 according to a second embodiment
  • Figure 3 is a perspective view of a vacuum pump with a check valve with two flat form springs in an exploded view
  • Figure 4 is an enlarged detail of Figure 3;
  • Figure 5 shows a similar section as in Figure 4 with only a flat shape spring;
  • Figure 6 is a perspective view of a vacuum pump with the neck
  • Figure 7 is a perspective view of a vacuum pump with a similar
  • FIG. 8 shows an enlarged detail of a vacuum pump with two flat form springs according to a further embodiment.
  • a vacuum pump 1 according to two different embodiments of the invention is shown schematically in cross section.
  • the vacuum pump 1 comprises a housing 2 in which a rotor 4 is rotatably arranged.
  • a wing 5 In or on the rotor 4, a wing 5 is slidably guided.
  • the rotor 4 hugs with its outer contour in a so-called Schmiegespalt to an inner contour of the housing 2.
  • the center of the Schmiegespalts represents a bottom dead center 6 of the vacuum pump 1.
  • a working space of the vacuum pump 1 is divided in the housing 2 in a suction chamber 8 and a pressure chamber 9.
  • the suction chamber 8 communicates with a suction connection, via which a medium, in particular air or an air-oil mixture, is sucked into the suction space 8 and conveyed out of the pressure space 9.
  • the aspirated medium passes through an inlet opening 14 in the suction chamber 8.
  • the monoflip pump is used to apply a negative pressure, that is, a vacuum, to a brake booster of a motor vehicle.
  • the pressurized medium in the pressure chamber 9 passes through an outlet opening 10 in the vicinity of the vacuum pump 1, where atmospheric pressure prevails.
  • air is normally expelled from the pressure chamber 9 through the outlet opening 10 with oil components contained in it.
  • the outlet opening 10 is part of a check valve 13, which prevents backflow of air from the environment into the pressure chamber 9, as long as the pressure in the pressure chamber 9 is less than the ambient pressure.
  • the outlet opening 10 For the dimensioning of the outlet opening 10 are extreme conditions determining, in particular a relatively high internal pressure at cold start of the vacuum pump 1, since the oil contained in the air in the cold state has a relatively high viscosity. Furthermore, at high speeds pressure peaks can occur with significantly increased pressure values. In order to keep the maximum occurring pressures in the vacuum pump 1 as low as possible, the outlet opening 10 must be designed to be large.
  • the outlet opening 10 is formed into a main outlet section 11; 15 and an additional outlet section 12; 16 divided.
  • the medium in particular the air-oil mixture, is pushed out of the pressure chamber 9 via the main outlet cross section 11, 15, while the additional outlet cross section 12; 16 is closed.
  • the main outlet section 11; 15 significantly smaller than the Rajauslassquerrough 12; 16.
  • the Hauptauslassquerrough 11; 15 arranged closer to the bottom dead center 6, as the Rajauslassquerrough 12; 16.
  • the main outlet cross-section I i; 15 each between the bottom dead center 6 and the Rajauslassquerrough 12; 16 arranged.
  • the main outlet cross section 11 is at a distance from the additional outlet cross section 12.
  • the Hauptauslassquerites 15 and the Rajauslassquerrough 16 form a common slot.
  • FIGS. 3 and 4 a vacuum pump 21 with a housing 22 is shown in detail and in perspective.
  • a main outlet cross-section 25 is spaced from a soirauslassquerrough 26.
  • the Schmidtauslassquerrough 25 is circular and Part of a through hole.
  • the Huaweiauslassquerrough 26 is greater than the Hauptauslassquerrough 25 and has substantially the shape of a slot.
  • the two outlet cross-sections 25, 26 are covered by a main flat-form spring 27, which is arranged between the housing 22 and an additional flat-form spring 28.
  • the two flat form springs 27, 28 are fastened together with a flat form spring holder 29 by means of a screw 30 at a clamping point or attachment point 31 to the housing 22.
  • the flat form spring holder 29 limits the opening movement of the flat form springs 27, 28 when they lift off from the outlet opening in the housing 22.
  • the size of the main flat-form spring 27 is selected such that both the main outlet cross-section 25 and the additional outlet cross-section 26 are covered by the main flat-form spring 27.
  • the additional flat shape spring 28 is smaller than the main flat shape spring 27 and designed so that the additional flat shape spring 28 covers only the Rajauslassquer4.000 26 and not the Hauptauslassquerrough 25.
  • the two outlet cross-sections 25, 26, together with the two flat-form springs 27, 28 and the flat-form spring holder 29, form a check valve which, depending on the pressure, provides different outlet cross-sections.
  • FIGS. 5 and 6 show a similar exemplary embodiment as in FIGS. 3 and 4. Identical parts are provided with the same reference numerals. To avoid repetition, reference is made to the preceding description of Figures 3 and 4. In the following, the differences between the two embodiments are mainly discussed.
  • the two outlet cross sections 25, 26 are covered by a single flat-form spring 35.
  • the flat-form spring 35 is clamped between the housing 22 and the flat-form spring holder 29.
  • the flat shape spring 35 has a spring stiffness which decreases from the clamping point 31. This is achieved in the illustrated embodiment by a tapered flat-shaped spring 35 made of plastic.
  • the flat-form spring 35 has a lower rigidity in the region of the main outlet cross-section 25 at its free end than in the region of the additional outlet cross-section 26.
  • FIG. 7 shows a similar exemplary embodiment as in FIG. Identical parts are provided with the same reference numerals. In the following, the differences between the individual embodiments will be discussed.
  • a single flat-form spring 42 is arranged between the housing 22 and the flat-form spring retention 29.
  • the flat-form spring 42 comprises a main section 44 which covers the main outlet cross-section 25.
  • the main section 44 is connected via a constriction region 46 to an additional section 45, which covers the additional outlet cross section 26.
  • the constriction 46 causes a significantly lower rigidity of the main portion 44 of the flat-form spring 42.
  • FIG. 8 shows an exemplary embodiment in which only one outlet opening 50 is recessed in the housing 2.
  • the outlet opening 50 is covered by a main flat-form spring 51, which has a through-hole 52 in the region of the outlet opening 50.
  • the through hole 52 has the shape of a slot whose dimensions are smaller than the dimensions of the outlet opening 50.
  • the main outlet section is defined by the through hole 52.
  • an auxiliary flat-shaped spring 56 which covers both the through-hole 52 having the main outlet section and the outlet opening 50 constituting the auxiliary outlet section.

Landscapes

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

Abstract

L'invention concerne une pompe à vide, en particulier une pompe à palettes, avec un rotor pouvant tourner autour d'un axe de rotation et logé dans un boîtier, qui présente au moins un orifice d'entrée et au moins un orifice de sortie muni d'un clapet anti-retour. L'invention est caractérisée en ce que le clapet anti-retour présente une section transversale de sortie principale, qui est libérée, seule ou en même temps qu'une section transversale de sortie additionnelle, en fonction de la pression régnant en amont de l'orifice de sortie.
PCT/EP2008/005824 2007-08-04 2008-07-17 Pompe à vide WO2009018906A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112008001967T DE112008001967A5 (de) 2007-08-04 2008-07-17 Vakuumpumpe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007038122.2 2007-08-04
DE102007038122 2007-08-04

Publications (1)

Publication Number Publication Date
WO2009018906A1 true WO2009018906A1 (fr) 2009-02-12

Family

ID=39855150

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/005824 WO2009018906A1 (fr) 2007-08-04 2008-07-17 Pompe à vide

Country Status (2)

Country Link
DE (1) DE112008001967A5 (fr)
WO (1) WO2009018906A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010145633A3 (fr) * 2009-06-17 2011-09-15 Ixetic Hückeswagen Gmbh Pompe à vide
WO2013139570A3 (fr) * 2012-03-22 2014-07-03 Oerlikon Leybold Vacuum Gmbh Pompe à vide à palettes rotatives
WO2015090715A1 (fr) 2013-12-17 2015-06-25 Magna Powertrain Bad Homburg GmbH Soupape d'échappement
DE102016207123A1 (de) * 2016-04-27 2017-11-02 Mahle International Gmbh Rückschlagventil für eine Vakuumpumpe
DE102016207115A1 (de) * 2016-04-27 2017-11-02 Mahle International Gmbh Rückschlagventil für eine Vakuumpumpe
WO2018224117A1 (fr) 2017-06-09 2018-12-13 Wabco Europe Bvba Soupape flexible de pompe à vide pouvant réduire le couple de démarrage à froid

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1336873A (en) * 1970-01-31 1973-11-14 Gen Eng Radcliffe Vacuum pumps
DE4019854A1 (de) * 1989-07-10 1991-01-17 Barmag Barmer Maschf Fluegelzellen-vakuumpumpe
DE9311376U1 (de) * 1993-07-30 1993-09-30 Helmut Brey GmbH, 87700 Memmingen Trockenlaufende Drehschieber-Vakuumpumpe mit Auslaßventil
US20050175494A1 (en) * 2003-03-05 2005-08-11 Daikin Industries, Ltd. Compressor
WO2006129333A1 (fr) * 2005-05-30 2006-12-07 O.M.P. Officine Mazzocco Pagnoni S.R.L. Pompe a vide pour moteurs de vehicule et valve de retenue pour ladite pompe a vide

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1336873A (en) * 1970-01-31 1973-11-14 Gen Eng Radcliffe Vacuum pumps
DE4019854A1 (de) * 1989-07-10 1991-01-17 Barmag Barmer Maschf Fluegelzellen-vakuumpumpe
DE9311376U1 (de) * 1993-07-30 1993-09-30 Helmut Brey GmbH, 87700 Memmingen Trockenlaufende Drehschieber-Vakuumpumpe mit Auslaßventil
US20050175494A1 (en) * 2003-03-05 2005-08-11 Daikin Industries, Ltd. Compressor
WO2006129333A1 (fr) * 2005-05-30 2006-12-07 O.M.P. Officine Mazzocco Pagnoni S.R.L. Pompe a vide pour moteurs de vehicule et valve de retenue pour ladite pompe a vide

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010145633A3 (fr) * 2009-06-17 2011-09-15 Ixetic Hückeswagen Gmbh Pompe à vide
WO2013139570A3 (fr) * 2012-03-22 2014-07-03 Oerlikon Leybold Vacuum Gmbh Pompe à vide à palettes rotatives
CN104204533A (zh) * 2012-03-22 2014-12-10 厄利孔莱博尔德真空技术有限责任公司 旋片式真空泵
CN104204533B (zh) * 2012-03-22 2017-03-08 莱宝有限责任公司 旋片式真空泵
WO2015090715A1 (fr) 2013-12-17 2015-06-25 Magna Powertrain Bad Homburg GmbH Soupape d'échappement
US9863422B2 (en) 2013-12-17 2018-01-09 Magna Powertrain Bad Homburg GmbH Vacuum pump outlet valve
DE102016207123A1 (de) * 2016-04-27 2017-11-02 Mahle International Gmbh Rückschlagventil für eine Vakuumpumpe
DE102016207115A1 (de) * 2016-04-27 2017-11-02 Mahle International Gmbh Rückschlagventil für eine Vakuumpumpe
WO2018224117A1 (fr) 2017-06-09 2018-12-13 Wabco Europe Bvba Soupape flexible de pompe à vide pouvant réduire le couple de démarrage à froid
US11143188B2 (en) 2017-06-09 2021-10-12 Zf Cv Systems Europe Bv Vacuum pump reed valve which will reduce cold start torque

Also Published As

Publication number Publication date
DE112008001967A5 (de) 2010-05-27

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