WO2015124415A1 - Kraftfahrzeugs-vakuumpumpe - Google Patents
Kraftfahrzeugs-vakuumpumpe Download PDFInfo
- Publication number
- WO2015124415A1 WO2015124415A1 PCT/EP2015/052090 EP2015052090W WO2015124415A1 WO 2015124415 A1 WO2015124415 A1 WO 2015124415A1 EP 2015052090 W EP2015052090 W EP 2015052090W WO 2015124415 A1 WO2015124415 A1 WO 2015124415A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- vacuum pump
- motor vehicle
- microgrooves
- 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.)
- Ceased
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
- F04C29/06—Silencing
-
- 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
-
- 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
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high 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
- 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
-
- 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
-
- 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
- F04C2240/00—Components
- F04C2240/10—Stators
-
- 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
- F04C2240/00—Components
- F04C2240/20—Rotors
-
- 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
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/13—Noise
Definitions
- the invention relates to a motor vehicle vacuum pump, which is designed as a positive displacement pump, for example as a vane pump.
- the motor vehicle vacuum pump is an accessory in a motor vehicle, which is for example driven directly by an internal combustion engine or by a separate electric drive motor.
- the motor vehicle vacuum pump has a pumping space in which a pump rotor rotates, which compresses a gas, usually air, within the pump space and pushes it out of the pump space into an outlet space through an outlet valve.
- the outlet valve prevents backflow of compressed gas from the outlet space into the pumping space.
- a leaf spring valve is often used because of its simple construction and high reliability, in which the valve body is formed as a leaf spring which rests in the closed position on a valve seat surrounding the valve opening and lifts at sufficient pressure difference from the valve seat, so that the exhaust valve opens becomes.
- Problematic or at least undesirable in vacuum pumps with exhaust valves is the noise that results essentially from the high accelerations of the valve body, the lubricant in a lubricated vacuum pump and the sudden compression or decompression of the gas.
- a mechanical automotive vacuum pump in which, for the purpose of noise reduction in the vicinity of the exhaust valve, a channel or an opening is provided to reduce the pressure changes in this area gradually.
- a mechanical automotive vacuum pump in which an opening is provided for the purpose of noise reduction in the valve body formed as a leaf spring to gradually reduce the pressure changes in this area.
- the object of the invention was in contrast to provide a motor vehicle vacuum pump with reduced noise.
- the valve seat and / or the corresponding part of the valve body closing body on several microns which are oriented in a star-like manner in the lateral direction, so are arranged approximately radially, for example, circular valve opening.
- the microgrooves in this way produce drainage in the closing plane of the outlet valve, via which a faster pressure equalization takes place in the interface between the valve seat and the corresponding part of the closing body when the outlet valve is opened.
- the dissolving force for overcoming the adhesion force caused by the lubricant between the valve seat and the corresponding edge region of the closing body is thereby considerably reduced.
- the opening movement of the closing body is harmonious, so that the noise during opening is reduced.
- the Closing movement is thereby harmonious, so that the noise is reduced when closing the exhaust valve.
- the groove depth t of the microgrooves is smaller than 0.2 mm, and more preferably smaller than 0.1 mm.
- the groove width of the microgrooves is less than 0.5 mm, and is particularly preferably less than 0.25 mm.
- the ratio of the length I of the microgrooves to their mutual lateral distance d is greater than 1.0.
- the distance between two micro-grooves is usually smaller than the length of the micro-grooves.
- the microgrooves do not intersect, but are arranged in a star-like manner. In rectilinear regions of the valve seat, the microgrooves are preferably arranged parallel to one another.
- the microgrooves are provided either only on the valve seat or only on the closing body.
- the microgrooves are provided only on the valve seat which surrounds the valve opening.
- the positive effects on the noise emissions can not be significantly improved by providing the microgrooves on both the valve seat and the valve body closing body, so that by providing the micro grooves only one side of the interface the manufacturing cost without functional
- one longitudinal end of the 5 micron grooves is toward the valve opening and the other longitudinal end of the microgrooves is open toward the outlet space.
- the exhaust valve is completely closed, that is, when the closing body rests completely on the valve seat, the two longitudinal ends of the micro grooves are open, so that the maximum possible drainage function in the groove longitudinal direction is available even with the exhaust valve completely closed.
- valve seat is raised. This simple measure can in particular ensure that the microgrooves are always open on the outside at their outer longitudinal end to the outlet space.
- the microgrooves are made by laser engraving or by embossing. In this way, the opening and closing behavior of the exhaust valve can be significantly improved with a relatively simple process.
- the valve body is designed as a leaf spring. Such a design of the valve body is inexpensive and mechanically reliable.
- FIG. 1 shows an opened motor vehicle vacuum pump with a view of the dividing wall separating the pump space from the outlet space, in which an outlet valve is provided;
- FIG. 2 shows a plan view of the dividing wall including the valve seat in the region of the outlet valve
- FIG. 3 shows a plan view of the pump chamber side of the valve body in a first embodiment
- Figure 4 is a plan view of the pump chamber side of the valve body in a second embodiment
- Figure 5 shows a cross section of the partition wall in the region of the outlet valve.
- FIG. 1 shows an open motor vehicle vacuum pump 10, in which a partition wall 22 is visible, which separates a pump space 12 from an outlet space 14, as shown in the cross-sectional representation of FIG.
- the vacuum pump 10 is a so-called mechanical vacuum pump, which is mechanically driven by an internal combustion engine, that rotates with a speed proportional to the speed of the internal combustion engine.
- the vacuum pump 10 is driven in the installed state directly via the camshaft of the engine.
- the vacuum pump 10 is designed as a compacting pump, and compresses discontinuously gas, in particular air.
- an outlet valve 20 is provided on the partition 22, which opens at a corresponding overpressure in the pump chamber 12 and at non-overpressure in the pump chamber 12, a return flow of the Gas from the outlet chamber 14 back into the pump chamber 12 prevented.
- the outlet valve 20 is shown in Figure 5 together with the partition wall 22 in cross section.
- the outlet valve 20 is a so-called Federblatt-Venti! educated.
- In the partition wall 22 is a longitudinal oval
- valve body 40 On the outlet chamber side 23 of the partition 22, which faces the pump chamber side 21, a valve body 40; 40 v is fixed, which in a first embodiment in Figure 3 and in a second embodiment in Figure 4 in plan view of his pump room side side in Detail o is shown.
- the valve body 40, 40 * has three sections in the longitudinal extent, namely the closing body section 43, 43, the hinge section 44 and the fastening section 46.
- the valve body 40; 40 ' consists of spring plate and has in its joint portion 44 a taper 45, whereby the valve body 40; 40 'is formed in this section 44 easier bendable than in the adjacent sections 46,43.
- the valve body 40, 40 ' has a mounting opening 48 and a recess 52.
- the valve body 40 is fixed with a fastening means 50 in an example provided with a threaded bore 28 of the partition 22.
- the fastener 50 may be a screw, a rivet, or other suitable fastener.
- the recess 52 engages around a raised retaining lug 24 of the partition wall 22, so that the valve body 40 is fixed by the fastening means 50 and the retaining lug 24 clearly and non-rotatably on the partition wall 22.
- the partition wall 22 has a joint depression 26.
- a closing body 42,42' is arranged, which completely closes the valve opening 24 in its closed position shown in Figure 5.
- the partition wall 22 On the outlet-side 23, the partition wall 22 has a valve seat 30 which is raised and planar with respect to the partition wall base plane and onto which the corresponding strip-like edge region of the pump chamber-side side of the closing body shown in FIGS. 3 and 4 rests in the slipping position 42.
- the web-like valve seat 30 has a raised height with respect to the neighboring areas of about 1 mm.
- the valve seat has 30 to 50 micron grooves 32, which are oriented in the lateral direction, that is to say run in a star-like manner from inside to outside and do not intersect.
- the microgrooves 32 are oriented approximately perpendicular to the opening edge.
- the microgrooves 32 have been laser engraved into the valve seat 30.
- the microgrooves 32 typically have a groove depth t of 0.025 mm and a groove width b of 0.1 mm.
- the length I of the microgrooves 32 may be 1.0 to 2.0 mm, the lateral distance d of two adjacent microgrooves to each other is less than 1.0 mm. In any case, the mean lateral distance d is always smaller than the length I of the microgrooves 32.
- valve body 40 ' has on its side facing the valve seat 30 microgrooves 32' having the same dimensions and orientations as the microgrooves 32 in the valve seat 30.
- the valve body 40 'with microgrooves 32' may be combined with a valve seat without micro grooves, or with a valve seat 30 according to the figures 2 and 5 with micro grooves 32nd
- the microgrooves 32 on the valve seat 30 are open at their two longitudinal ends, so that the outer longitudinal ends open towards the outlet space and the inner longitudinal ends are open towards the pumping space. In this way, at both longitudinal ends, a fluid flow into the respective micro grooves can flow in or out, so that a corresponding pressure equalization in the micro groove is always possible.
- a drainage of the valve seat 30 is ensured in all operating states of the exhaust valve 20.
- the vacuum pump 10 is preferably lubricated with oil, so that, in particular, oil is allowed to flow through the microgrooves 32 during an opening and a closing operation. 32 'flows in and out.
- the valve body 40; 40 ' is biased so that it opens at a differential pressure of about 0.04 bar.
- the oil can already flow in the direction of the opening center at the aforementioned differential pressure, so that the oil film between the valve seat 30 and the closing body 42; 43 'quickly breaks off.
- a harmonic opening movement of the valve body 40 is made possible, so that the noise emissions are significantly reduced. This also applies analogously to the closing movement.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Details Of Valves (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/115,694 US11047391B2 (en) | 2014-02-18 | 2015-02-02 | Motor vehicle vacuum pump |
| CN201580008803.4A CN106030114B (zh) | 2014-02-18 | 2015-02-02 | 机动车真空泵 |
| JP2016547523A JP6490699B2 (ja) | 2014-02-18 | 2015-02-02 | 自動車用真空ポンプ |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP14155617.5A EP2908011B1 (de) | 2014-02-18 | 2014-02-18 | Kraftfahrzeug-Vakuumpumpe |
| EP14155617.5 | 2014-02-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015124415A1 true WO2015124415A1 (de) | 2015-08-27 |
Family
ID=50112849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2015/052090 Ceased WO2015124415A1 (de) | 2014-02-18 | 2015-02-02 | Kraftfahrzeugs-vakuumpumpe |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11047391B2 (de) |
| EP (1) | EP2908011B1 (de) |
| JP (1) | JP6490699B2 (de) |
| CN (1) | CN106030114B (de) |
| WO (1) | WO2015124415A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108138778B (zh) * | 2015-11-02 | 2020-03-31 | 皮尔伯格泵技术有限责任公司 | 机动车真空泵 |
| DE102016209382A1 (de) | 2016-05-31 | 2017-11-30 | Mahle International Gmbh | Rückschlag-/Auslassventil für eine Vakuumpumpe |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1953389A2 (de) * | 2007-01-29 | 2008-08-06 | Pierburg GmbH | Vakuumpumpe |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58172482A (ja) * | 1982-04-05 | 1983-10-11 | Hitachi Ltd | スクロ−ル圧縮機 |
| JPS60122287A (ja) * | 1983-12-06 | 1985-06-29 | Mitsubishi Electric Corp | 圧縮機の吐出弁装置 |
| CH674757A5 (de) * | 1988-01-19 | 1990-07-13 | Burckhardt Ag Maschf | |
| CN1083062C (zh) * | 1995-04-20 | 2002-04-17 | Lg电子株式会社 | 密闭式压缩机 |
| JPH09291960A (ja) * | 1996-04-25 | 1997-11-11 | Unisia Jecs Corp | 液圧緩衝器のバルブ構造 |
| US5934305A (en) * | 1996-09-12 | 1999-08-10 | Samsung Electronics Co., Ltd. | Method of manufacturing a reciprocating compressor |
| KR100253656B1 (ko) * | 1997-08-29 | 2000-05-01 | 배길성 | 압축기용 밸브 어셈블리 |
| JP2001221173A (ja) * | 2000-02-04 | 2001-08-17 | Mitsubishi Heavy Ind Ltd | スクロール圧縮機 |
| GB2380523A (en) | 2001-06-27 | 2003-04-09 | Luk Automobiltech Gmbh & Co Kg | Vacuum generator |
| JP2007064196A (ja) * | 2005-08-05 | 2007-03-15 | Valeo Thermal Systems Japan Corp | 弁機構構成部材の加工方法 |
| JP5313761B2 (ja) * | 2009-05-08 | 2013-10-09 | パナソニック株式会社 | リチウムイオン電池 |
| KR101408057B1 (ko) * | 2010-01-28 | 2014-06-17 | 가부시키가이샤 도요다 지도숏키 | 압축기 |
-
2014
- 2014-02-18 EP EP14155617.5A patent/EP2908011B1/de active Active
-
2015
- 2015-02-02 CN CN201580008803.4A patent/CN106030114B/zh active Active
- 2015-02-02 WO PCT/EP2015/052090 patent/WO2015124415A1/de not_active Ceased
- 2015-02-02 JP JP2016547523A patent/JP6490699B2/ja active Active
- 2015-02-02 US US15/115,694 patent/US11047391B2/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1953389A2 (de) * | 2007-01-29 | 2008-08-06 | Pierburg GmbH | Vakuumpumpe |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017503965A (ja) | 2017-02-02 |
| JP6490699B2 (ja) | 2019-03-27 |
| CN106030114A (zh) | 2016-10-12 |
| EP2908011A1 (de) | 2015-08-19 |
| CN106030114B (zh) | 2018-01-02 |
| US20170009770A1 (en) | 2017-01-12 |
| US11047391B2 (en) | 2021-06-29 |
| EP2908011B1 (de) | 2017-11-08 |
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