EP2299055B1 - Automotive vacuum vane pump - Google Patents

Automotive vacuum vane pump Download PDF

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Publication number
EP2299055B1
EP2299055B1 EP20090170219 EP09170219A EP2299055B1 EP 2299055 B1 EP2299055 B1 EP 2299055B1 EP 20090170219 EP20090170219 EP 20090170219 EP 09170219 A EP09170219 A EP 09170219A EP 2299055 B1 EP2299055 B1 EP 2299055B1
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EP
European Patent Office
Prior art keywords
vane
pump
metal
tip
automotive vacuum
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.)
Active
Application number
EP20090170219
Other languages
German (de)
French (fr)
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EP2299055A1 (en
Inventor
Nicola Novi
Giacomo Armenio
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 EP20090170219 priority Critical patent/EP2299055B1/en
Publication of EP2299055A1 publication Critical patent/EP2299055A1/en
Application granted granted Critical
Publication of EP2299055B1 publication Critical patent/EP2299055B1/en
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
    • F01C21/08—Rotary pistons
    • F01C21/0809—Construction of vanes or vane holders
    • F01C21/0881—Construction of vanes or vane holders the vanes consisting of two or more parts
    • 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
    • F04C18/3442—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 the surfaces of the inner and outer member, forming the inlet and outlet opening
    • 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
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/90—Alloys not otherwise provided for
    • F05C2201/903—Aluminium alloy, e.g. AlCuMgPb F34,37
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2253/00—Other material characteristics; Treatment of material
    • F05C2253/04—Composite, e.g. fibre-reinforced

Definitions

  • the present invention refers to an automotive vacuum vane pump which comprises a housing with a radially moveable rotor vane.
  • Vacuum vane pumps of the state of the art comprise one or more vanes of a constant length, wherein the vane tips slide at a pump chamber wall.
  • the vane separates the pump chamber in different rooms, for example in case of vacuum pump with a single vane assembly in an intake room and a pressure room.
  • Vacuum vane pumps are used in automotive applications as a supply device for servo brake devices, valves etc.
  • the pump comprises a housing with a radially moveable rotor vane, wherein the one-pleced metal vane has a constant length and wherein the vane tips slide at a pump chamber wall.
  • a vacuum vane pump with a relatively heavy metal vane tends to vibrations due to high centrifugal forces, and therefore the pump is subject to high energy consumptions and mechanical wear.
  • Another relevant problem is the abrasion of the vane ends or tips and the pump chamber wall.
  • DE 10200434921 B3 discloses a vacuum pump with a vane consisting of a metal vane body and a plastic tip.
  • US 5560741 A refers to a fluid displacement machine used in an automotive air-conditioning environment.
  • the machine is designed as a non-contacting displacement machine so that the vanes maintain always in adjacent but In non-contacting relationship with respect to the interior surface of the housing body.
  • EP 1134417 A2 refers to a fluid vane pump consisting of a vane body and a separate vane tip.
  • the vane body is made out of metal and the vane tip is made out of plastic.
  • WO 0073629 A1 refers to a rotary vane pump for pumping air across the gyroscope instruments in piston powered aircrafts and does not refer to an automotive vacuum vane pump.
  • the vanes are integral and therefore are only made out of one material which is carbon fiber reinforced PEEK.
  • the automotive vacuum vane pump according to claim 1 comprises a housing with a radially moveable rotor vane, wherein the vane consists of at least two components, i.e. a metal vane body and one or two separate plastic vane tips at one or both ends of the vane.
  • the metal vane body and the plastic vane tips can be optimized with respect to their special function.
  • the metal vane body material for example, can have a high stability.
  • the plastic tips can have a hardness which is less than the pump chamber wall hardness. Therefore, the abrasion of the metal pump chamber wall can be reduced significantly.
  • the vane body is made out of an aluminum alloy which is produced via a continuous casting process.
  • Aliminum alloy is a lightweight material and comprises the benefit of an enhanced stability whereby the weight remains unchanged in comparison with pure aluminum.
  • the continuously cast material provides an inexpensive production due to the inherently lower cost of continuous, standardized production of the product.
  • the vane tips are made out of a thermosetting plastic which is fiber reinforced.
  • the vane tips are more elastic and stronger in comparison to pure thermosetting plastic.
  • the metal vane body comprises axial recesses arranged in series in longitudinal direction of the vane, i.e. in radial direction of the rotor. This causes a weight reduction whereby the rigidity and the stability of the vane remains unchanged. Therefore, the automotive vacuum vane pump ensures long life properties and functionality, respectively.
  • the metal vane body comprises radial, i.e. longitudinal recesses arranged in series in axial direction of the vane. This causes a weight reduction whereby the rigidity and the stability of the vane remains unchanged. Moreover, the radial recesses which are arranged in axial direction cause a more stiff vane body in the direction of the main bending load.
  • the vane tip is provided moveable in longitudinal direction at the vane body, i.e. moveable in radial direction of the rotor.
  • the movability of the vane tip ensures air-tightness in case of abrasion.
  • the combination of movable plastic tips and an aluminum alloy vane body leads to a lower impact of the centrifugal forces, which are primarily responsible for abrasion in view of maximum rotating speeds between 5000 and 10000 rpm.
  • This assembly causes at one hand a reduced abrasion of said plastic vane tips and on the other hand ensures air-tightness.
  • the vane tip is form-fitted hold at the vane body.
  • the section of the vane tips has a mushroom form.
  • the vane tips provide a semicircle head and a flat shaft.
  • the flat shaft is arranged in a form-fitted recess of the vane body.
  • This embodiment provides a torque-proof support of the vane tip at the vane body.
  • the longitudinal movability of the tip provides an air-tight pump chamber separation during the life time of the pump.
  • a vacuum vane pump 10 is shown in a plan view.
  • the automotive vacuum vane pump 10 comprises a metal housing 40 with an inlet opening 47 and an outlet opening 48.
  • the housing 40 surrounds the pump chamber 44.
  • the pump chamber 44 is surrounded by a non-cylindrical pump chamber wall 42.
  • the pump chamber 44 comprises a circular pump rotor 30.
  • the pump rotor 30 is with its circumferential rotor wall 32 arranged adjacent to the side wall 43 of the pump chamber 44, whereby a protrusion (not shown) of the pump rotor 30 protrudes axially to the outside of the side wall 43.
  • the protrusion of the pump rotor 30 can be rotated by a pump motor (not shown).
  • the pump rotor 30 has a radial continuous vane guiding opening 26, wherein a radially moveable vane 20 is mounted.
  • the vane 20 comprises a metal vane body 22 with two with respect to the rotor 30 radially moveable plastic vane tips 24 at the ends of the metal vane body 22, whereby the plastic vane tips 24 slide at the pump chamber wall 42.
  • the vane tips 24 are arranged torque-proof with respect to the longitudinal axis of the vane 20.
  • the vane 20 separates the pump chamber 44 into an intake room 45 and a pressure room 46, because the rotor wall 32 slides permanently at the pump chamber wall 42, and thereby separates the intake room 45 and the pressure room 46 air-tight.
  • the vane 20 comprises a metal vane body 22 and two radially, i.e. in the longitudinal direction of the metal vane body 22, moveable plastic vane tips 24 at the end of the vane 20.
  • the metal vane body 22 comprises rectangular and/or elongated axial recesses 25 arranged in series in radial direction of the vane 20 in order to reduce the weight of the vane 20.
  • Figure 3 shows the metal vane body 22.
  • the metal vane body 22 comprises rectangular and/or elongated radial recesses 27 arranged in series in axial direction of the vane 20 in order to reduce the weight of the vane 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Description

  • The present invention refers to an automotive vacuum vane pump which comprises a housing with a radially moveable rotor vane.
  • Vacuum vane pumps of the state of the art comprise one or more vanes of a constant length, wherein the vane tips slide at a pump chamber wall. The vane separates the pump chamber in different rooms, for example in case of vacuum pump with a single vane assembly in an intake room and a pressure room. Vacuum vane pumps are used in automotive applications as a supply device for servo brake devices, valves etc.
  • The pump comprises a housing with a radially moveable rotor vane, wherein the one-pleced metal vane has a constant length and wherein the vane tips slide at a pump chamber wall. A vacuum vane pump with a relatively heavy metal vane tends to vibrations due to high centrifugal forces, and therefore the pump is subject to high energy consumptions and mechanical wear. Another relevant problem is the abrasion of the vane ends or tips and the pump chamber wall.
  • DE 10 2005 058 129 A1 discloses a vacuum vane pump construction with a single thermosetting plastic vane, wherein the complete vane is made of a fiber reinforced material. The manufacturing of these vanes is complex and cost-intensive, and the vane ends are subject to abrasion so that the vane length decreases during the lifetime of the pump.
  • DE 10200434921 B3 discloses a vacuum pump with a vane consisting of a metal vane body and a plastic tip.
  • US 5560741 A refers to a fluid displacement machine used in an automotive air-conditioning environment. The machine is designed as a non-contacting displacement machine so that the vanes maintain always in adjacent but In non-contacting relationship with respect to the interior surface of the housing body.
  • EP 1134417 A2 refers to a fluid vane pump consisting of a vane body and a separate vane tip. The vane body is made out of metal and the vane tip is made out of plastic.
  • WO 0073629 A1 refers to a rotary vane pump for pumping air across the gyroscope instruments in piston powered aircrafts and does not refer to an automotive vacuum vane pump. The vanes are integral and therefore are only made out of one material which is carbon fiber reinforced PEEK.
  • It is an object of the present invention to provide a vane pump with improved long life properties.
  • This object is solved with an automotive vacuum vane pump with the features of claim 1.
  • The automotive vacuum vane pump according to claim 1 comprises a housing with a radially moveable rotor vane, wherein the vane consists of at least two components, i.e. a metal vane body and one or two separate plastic vane tips at one or both ends of the vane. Both, the metal vane body and the plastic vane tips can be optimized with respect to their special function. The metal vane body material, for example, can have a high stability. The plastic tips can have a hardness which is less than the pump chamber wall hardness. Therefore, the abrasion of the metal pump chamber wall can be reduced significantly.
  • The vane body is made out of an aluminum alloy which is produced via a continuous casting process. Aliminum alloy is a lightweight material and comprises the benefit of an enhanced stability whereby the weight remains unchanged in comparison with pure aluminum. The continuously cast material provides an inexpensive production due to the inherently lower cost of continuous, standardized production of the product.
  • The vane tips are made out of a thermosetting plastic which is fiber reinforced. The vane tips are more elastic and stronger in comparison to pure thermosetting plastic.
  • According to a preferred embodiment of the invention, the metal vane body comprises axial recesses arranged in series in longitudinal direction of the vane, i.e. in radial direction of the rotor. This causes a weight reduction whereby the rigidity and the stability of the vane remains unchanged. Therefore, the automotive vacuum vane pump ensures long life properties and functionality, respectively.
  • Alternatively, the metal vane body comprises radial, i.e. longitudinal recesses arranged in series in axial direction of the vane. This causes a weight reduction whereby the rigidity and the stability of the vane remains unchanged. Moreover, the radial recesses which are arranged in axial direction cause a more stiff vane body in the direction of the main bending load.
  • According to a preferred embodiment of the invention, the vane tip is provided moveable in longitudinal direction at the vane body, i.e. moveable in radial direction of the rotor. The movability of the vane tip ensures air-tightness in case of abrasion.
  • According to a preferred embodiment of the invention, the combination of movable plastic tips and an aluminum alloy vane body leads to a lower impact of the centrifugal forces, which are primarily responsible for abrasion in view of maximum rotating speeds between 5000 and 10000 rpm. This assembly causes at one hand a reduced abrasion of said plastic vane tips and on the other hand ensures air-tightness.
  • Preferably, the vane tip is form-fitted hold at the vane body. The section of the vane tips has a mushroom form. The vane tips provide a semicircle head and a flat shaft. The flat shaft is arranged in a form-fitted recess of the vane body. This embodiment provides a torque-proof support of the vane tip at the vane body. The longitudinal movability of the tip provides an air-tight pump chamber separation during the life time of the pump.
  • The following is a detailed description of an embodiment of the invention with reference to the drawings, in which:
    • Figure 1 shows an automotive vacuum vane pump without a cover plate from the plan view,
    • Figure 2 shows a vane body with two moveable tips at the end of the vane, and
    • Figure 3 shows a vane body with radial recesses arranged in line in axial direction.
  • In figure 1, a vacuum vane pump 10 is shown in a plan view. The automotive vacuum vane pump 10 comprises a metal housing 40 with an inlet opening 47 and an outlet opening 48. The housing 40 surrounds the pump chamber 44. The pump chamber 44 is surrounded by a non-cylindrical pump chamber wall 42.
  • The pump chamber 44 comprises a circular pump rotor 30. The pump rotor 30 is with its circumferential rotor wall 32 arranged adjacent to the side wall 43 of the pump chamber 44, whereby a protrusion (not shown) of the pump rotor 30 protrudes axially to the outside of the side wall 43. The protrusion of the pump rotor 30 can be rotated by a pump motor (not shown).
  • The pump rotor 30 has a radial continuous vane guiding opening 26, wherein a radially moveable vane 20 is mounted. The vane 20 comprises a metal vane body 22 with two with respect to the rotor 30 radially moveable plastic vane tips 24 at the ends of the metal vane body 22, whereby the plastic vane tips 24 slide at the pump chamber wall 42. The vane tips 24 are arranged torque-proof with respect to the longitudinal axis of the vane 20.
  • The vane 20 separates the pump chamber 44 into an intake room 45 and a pressure room 46, because the rotor wall 32 slides permanently at the pump chamber wall 42, and thereby separates the intake room 45 and the pressure room 46 air-tight.
  • As figure 2 shows, the vane 20 comprises a metal vane body 22 and two radially, i.e. in the longitudinal direction of the metal vane body 22, moveable plastic vane tips 24 at the end of the vane 20. The metal vane body 22 comprises rectangular and/or elongated axial recesses 25 arranged in series in radial direction of the vane 20 in order to reduce the weight of the vane 20.
  • Figure 3 shows the metal vane body 22. The metal vane body 22 comprises rectangular and/or elongated radial recesses 27 arranged in series in axial direction of the vane 20 in order to reduce the weight of the vane 20.

Claims (5)

  1. Automotive vacuum vane pump (10) with
    a metal housing (40) with a pump chamber (44) being surrounded by a non-cylindrical pump chamber wall (42),
    a radially moveable rotor vane (20), the vane (20) comprising:
    a metal vane body (22), and
    a separate vane tip (24) at one end of the vane (20), wherein the vane tip (24) is made out of plastic and slides at the pump chamber wall (42),
    characterized In that
    the metal vane body (22) is made out of an aluminum alloy, and the vane tip (24) is made out of a thermosetting plastic reinforced with carbon fibers.
  2. Automotive vacuum vane pump (10) of claim 1, wherein the vane body (22) comprises axial recesses (25) arranged in series in radial direction of the vane (20).
  3. Automotive vacuum vane pump (10) of claim 1, wherein the vane body (22) comprises radial recesses (27) arranged in series in axial direction of the vane (20).
  4. Automotive vacuum vane pump (10) of one of the preceding claims, wherein the vane tip (24) is provided radially moveable at the vane body (22).
  5. Automotive vacuum vane pump (10) of one of the preceding claims, wherein the vane tip (24) is form-fitted hold at the vane body (22).
EP20090170219 2009-09-14 2009-09-14 Automotive vacuum vane pump Active EP2299055B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20090170219 EP2299055B1 (en) 2009-09-14 2009-09-14 Automotive vacuum vane pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20090170219 EP2299055B1 (en) 2009-09-14 2009-09-14 Automotive vacuum vane pump

Publications (2)

Publication Number Publication Date
EP2299055A1 EP2299055A1 (en) 2011-03-23
EP2299055B1 true EP2299055B1 (en) 2014-11-12

Family

ID=41683399

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090170219 Active EP2299055B1 (en) 2009-09-14 2009-09-14 Automotive vacuum vane pump

Country Status (1)

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EP (1) EP2299055B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105156324B (en) * 2015-09-11 2018-09-04 裕克施乐塑料制品（太仓）有限公司 A kind of novel plastic vacuum pump vanes and vacuum pump
CN105114308A (en) * 2015-09-11 2015-12-02 裕克施乐塑料制品（太仓）有限公司 Novel vacuum pump blade and vacuum pump

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0264778B1 (en) * 1986-10-18 1991-01-02 B a r m a g AG Vane pump
US5560741A (en) 1994-06-28 1996-10-01 Edwards; Thomas C. Non-contact vane-type fluid displacement machine with rotor and vane positioning
US6364646B1 (en) 1999-05-27 2002-04-02 Kevin R. Kirtley Rotary vane pump with continuous carbon fiber reinforced polyetheretherketone (peek) vanes
ATE250722T1 (en) 2000-03-15 2003-10-15 Joma Hydromechanic Gmbh DISPLACEMENT PUMP
DE102004064029B4 (en) 2004-07-09 2008-04-10 Joma-Hydromechanic Gmbh A single-blade
DE102005058129A1 (en) 2005-11-30 2007-05-31 Joma-Hydromechanic Gmbh Vacuum pump, comprises vane, pump housing and rotor rotatably mounted whereby vane has constant length and is one-piece design and is made of thermosetting plastic
DE502007005480D1 (en) * 2006-06-07 2010-12-09 Ixetic Hueckeswagen Gmbh VANE PUMP

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