EP2587064A1 - Pompe à vide à palettes - Google Patents

Pompe à vide à palettes Download PDF

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Publication number
EP2587064A1
EP2587064A1 EP11186917.8A EP11186917A EP2587064A1 EP 2587064 A1 EP2587064 A1 EP 2587064A1 EP 11186917 A EP11186917 A EP 11186917A EP 2587064 A1 EP2587064 A1 EP 2587064A1
Authority
EP
European Patent Office
Prior art keywords
sector
pump
vacuum pump
vane vacuum
outlet
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.)
Granted
Application number
EP11186917.8A
Other languages
German (de)
English (en)
Other versions
EP2587064B1 (fr
Inventor
Daniel Müller
Nabil Salim AL-HASAN
Sebastian Cramer
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.)
Pierburg Pump Technology GmbH
Original Assignee
Pierburg Pump Technology 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 Pierburg Pump Technology GmbH filed Critical Pierburg Pump Technology GmbH
Priority to EP20110186917 priority Critical patent/EP2587064B1/fr
Publication of EP2587064A1 publication Critical patent/EP2587064A1/fr
Application granted granted Critical
Publication of EP2587064B1 publication Critical patent/EP2587064B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F01C21/106—Stators; Members defining the outer boundaries of the working chamber with a radial surface, e.g. cam rings
    • 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
    • F04C2220/00—Application
    • F04C2220/10—Vacuum
    • F04C2220/12—Dry running
    • 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
    • F04C2250/30—Geometry of the stator
    • F04C2250/301—Geometry of the stator compression chamber profile defined by a mathematical expression or by parameters

Definitions

  • the invention relates to a vane vacuum pump for generating a negative pressure of 100 mbar absolute and less in a motor vehicle.
  • Such vacuum pumps are used in motor vehicles to provide the working pressure for other units available, for example, for a brake booster.
  • Automotive vacuum pumps are usually so-called vane vacuum pumps in which at least three slidably mounted in a rotor body slider divides the pump chamber into a corresponding number of rotating pump cells.
  • Conventional automotive vane vacuum pumps have a pump chamber having a circular cross-section with a correspondingly circular peripheral wall.
  • the circularity of the pumping space has the geometric consequence that the volume of the rotating pumping cells always changes.
  • a tangential force is caused on the slider, by which the slider is tilted in the circumferential direction, so that corresponding clamping forces between the slider and the Schleberschlitz are generated in the rotor body.
  • These clamping forces in turn consume a portion of the drive energy and are also responsible for increased wear of the slide.
  • the object of the invention is to provide a motor vehicle vane vacuum pump with reduced slide wear and reduced friction losses.
  • the pump space is divided into a plurality of rotating pump cells with a same cell sector angle ⁇ .
  • the peripheral wall of the pump housing, which defines the pump space radially, is not circular, but has an isovolumector sector b with a constant radius to the rotor axial, wherein the pump rotor is arranged eccentrically to the center of gravity of the pump chamber surface.
  • the isovolumometric vector b is at least 10 ° greater than the cell sector angle ⁇ .
  • the Isovolumetriesektor b is at least 20 ° larger, and most preferably at least 30 ° greater than the cell sector angle a.
  • the pumping cell traveling through the isovoluminescent sector thus does not change its volume over an angle of at least 10 ° or 20 or 30 °, ie it moves isovolumetrically in this sector.
  • the pumping cell In the region of the isovolumometric vector, the pumping cell is fluidically closed, i. the pump cell is not connected to either the inlet port or the outlet port.
  • the isovoluminescent sector is arranged in the direction of rotation between the inlet sector with the inlet opening and the outlet sector with the outlet opening.
  • the sliders are furthest out of the corresponding slide slots of the rotor body, so that even relatively small pressure differences between the two sides of the slide generate considerable tilting forces which generate corresponding clamping forces.
  • the isovoluximetry sector can also be arranged in the direction of rotation between the outlet sector and the inlet sector.
  • an electric motor for driving the pump rotor is provided.
  • the drive of the vacuum pump by an electric motor is particularly advantageous because the speed of the vacuum pump is then not directly dependent on the speed of the motor vehicle drive motor. Rather, in a simple embodiment, the electric motor can rotate the vacuum pump at an approximately constant speed, or, in a more elaborate embodiment, adapt the speed of the vacuum pump to the boundary conditions.
  • the vacuum pump is designed to run dry, so that no liquid pump lubrication is provided.
  • This design is constructively simple and inexpensive.
  • only a suitably suitable, low-friction material pairing has to be selected for the slide head on the one hand and the peripheral wall on the other hand.
  • each is a vane vacuum pump 10; 10 ', which is intended for use in a motor vehicle and can produce an absolute pressure of 100 mbar and less.
  • the vacuum pump 10 of FIG. 1 has a pump housing 12, which encloses a pump chamber 17 substantially.
  • the pump housing 12 consists essentially of a non-circular peripheral wall 14 and two lids 15, wherein in both figures, the overhead lid is not visible because of the representation in cross section.
  • a pump rotor 16 is arranged eccentrically to the center of gravity of the pump chamber 17 rotatably.
  • the pump rotor 16 has a rotor body 18 and five slides 20 which are slidably mounted in corresponding slide slots 22 of the rotor body 18 with a radial component.
  • the rotor body 18 is arranged such that at one point the peripheral wall 14 between the outlet opening 26 and The inlet opening 24, a sealing gap 28 is formed with a gap height of about 0.1 mm, which largely prevents a gas back flow from the outlet opening 26 to the inlet opening 24.
  • the five slides 20 divide the pumping space 17 into five rotating pumping cells, each having the same line sector angle ⁇ , which in the present case is approximately 72 °.
  • the pump rotor 16 rotates about a rotor axis 19 and is driven by an electric motor 30.
  • the pumping space 17 can be divided into a plurality of sectors, namely an inlet sector 32 with an inlet opening 24, an outlet sector 34 with an outlet opening 26 and an isovolumimetric sector 36 arranged in the direction of rotation of the motor 16 between the inlet sector 32 and the outlet sector 34.
  • the isovolumectomy 36 of the FIG. 1 extends over an angle b of about 160 °, that is about 90 ° greater than the cell sector angle a of 72 °.
  • the radius r of the peripheral wall 14 to the rotor axis 19 is constant over the entire Isovolumetriesektor- angle b, so that the cell volume of the pump cell in the region of Isovolumetriesektors 36 is constant and does not change.
  • the isovolumector sector 38 is arranged in the direction of rotation between the outlet sector 34 and the inlet sector 32.
  • the radius r 'of the peripheral wall 14' in the region of Isovolumetriesektors 38 is also constant here and approximately corresponds to the outer radius of the circular cross-section rotor body 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)
EP20110186917 2011-10-27 2011-10-27 Pompe à vide à palettes Active EP2587064B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20110186917 EP2587064B1 (fr) 2011-10-27 2011-10-27 Pompe à vide à palettes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20110186917 EP2587064B1 (fr) 2011-10-27 2011-10-27 Pompe à vide à palettes

Publications (2)

Publication Number Publication Date
EP2587064A1 true EP2587064A1 (fr) 2013-05-01
EP2587064B1 EP2587064B1 (fr) 2014-07-16

Family

ID=45442808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20110186917 Active EP2587064B1 (fr) 2011-10-27 2011-10-27 Pompe à vide à palettes

Country Status (1)

Country Link
EP (1) EP2587064B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3617512B1 (fr) * 2018-08-28 2022-11-30 Pfeiffer Vacuum Gmbh Pompe à vide du distributeur rotatif

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107330134B (zh) * 2017-05-04 2020-07-28 华南理工大学 液体泵实际工作循环模型的建立方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE626003A (fr) *
US4484873A (en) * 1980-12-09 1984-11-27 Nippon Soken, Inc. Through vane type rotary compressor with specific chamber configuration
US5169298A (en) * 1991-09-06 1992-12-08 Autocam Corporation Constrained vane compressor with oil skive
EP0933532A2 (fr) * 1998-02-02 1999-08-04 Asuka Japan Co., Ltd. Machine rotative à fluide du type à pallettes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE626003A (fr) *
US4484873A (en) * 1980-12-09 1984-11-27 Nippon Soken, Inc. Through vane type rotary compressor with specific chamber configuration
US5169298A (en) * 1991-09-06 1992-12-08 Autocam Corporation Constrained vane compressor with oil skive
EP0933532A2 (fr) * 1998-02-02 1999-08-04 Asuka Japan Co., Ltd. Machine rotative à fluide du type à pallettes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3617512B1 (fr) * 2018-08-28 2022-11-30 Pfeiffer Vacuum Gmbh Pompe à vide du distributeur rotatif

Also Published As

Publication number Publication date
EP2587064B1 (fr) 2014-07-16

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