EP3577342A1 - Flügelzellen-gaspumpe - Google Patents
Flügelzellen-gaspumpeInfo
- Publication number
- EP3577342A1 EP3577342A1 EP17706691.7A EP17706691A EP3577342A1 EP 3577342 A1 EP3577342 A1 EP 3577342A1 EP 17706691 A EP17706691 A EP 17706691A EP 3577342 A1 EP3577342 A1 EP 3577342A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid outlet
- outlet opening
- gas pump
- pump
- slot
- 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.)
- Pending
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
- 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
- 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
-
- 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
- F04C18/3446—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 more than one line or surface
-
- 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
- F04C2240/30—Casings or housings
Definitions
- the invention relates to a vane-cell gas pump.
- Such vane-type gas pumps are known from the prior art and are usually used in motor vehicles as so-called vacuum pumps in combination with a brake booster.
- the vane pump delivers the vacuum pressure required to operate the brake booster, which is generally 100 mbar or less in absolute terms.
- the vane-cell gas pumps known from the prior art are usually dry-running or oil-lubricated vane-cell gas pumps, wherein in the case of dry-running gas pumps, no lubricant is conducted into the pumping chamber.
- oil-lubricated vane pumps the air exiting the pumping chamber is mixed with lubricant, and prior to disposal of this air-lubricant mixture, the air-lubricant mixture must be laboriously separated into its components.
- By omitting the lubricant the contamination of the air leaving the pumping chamber can be avoided.
- the omission of the lubricant but leads to increased wear of the relatively moving components, in particular the slide elements. The wear is usually reduced to a minimum by selective choice of suitable material pairings of the abutting and mutually relatively moving components.
- a dry-running vane gas pump is disclosed in EP 2 568 180 A1.
- the vane gas pump has a pump housing, which forms a pumping chamber.
- a pump rotor is arranged, which has five radially displaceable slide elements.
- the pump rotor is rotatably connected to an electric motor and is driven by this.
- the slide elements shift due to the force acting on the slide elements centrifugal force such that they rest with their head in each case on a peripheral wall of the pumping chamber.
- Two adjacent slide elements bound together with the pump rotor and the pump housing in each case a circulating Pumpfach.
- a fluid inlet opening associated with the pumping chamber and two fluid outlet openings associated with the pumping chamber are formed, wherein the fluid outlet openings are designed with a circular opening cross-section.
- a disadvantage of the embodiment disclosed in EP 2 568 180 A1 is that the opening cross-sections of the circular fluid outlet openings must have a certain size in order to ensure a low flow resistance.
- this causes a brief short circuit between two adjacent pump wells when the relevant slide element passes the fluid outlet opening.
- Such a short circuit leads to an increase in the leakage at the individual slide elements, whereby the pneumatic efficiency of the vane-cell gas pump decreases. If you make the fluid outlet smaller, the flow resistance increases, which at high speeds, an overpressure prevails in the Pumpfzzern in the outlet.
- the slider elements are additionally mechanically stressed and increases the wear of the slider elements.
- the invention is therefore an object of the invention to provide a vane gas pump with low wear of the slide elements and a good pneumatic efficiency. This object is achieved by a vane gas pump having the features of the main claim.
- the vane-gas pump according to the invention has a pump housing which defines a pumping chamber.
- a pump rotor is arranged, which is either driven electrically by an associated electric motor or mechanically by an internal combustion engine.
- the pump rotor is arranged eccentrically in the pumping chamber and, together with the peripheral wall of the pumping chamber, forms a sealing gap defining the sealing sector, whereby a crescent-shaped working space is defined outside the sealing sector.
- At least one displaceable slide element is mounted in the pump rotor.
- the pump rotor has a slide slot, in which in each case the at least one slide element is displaceably mounted and arranged.
- the at least one slide element shifts due to the force acting on the slide element centrifugal force such that the slide element always rests with its head on the peripheral wall of the pumping chamber.
- the at least one slide element may be spring-loaded, so that the head of the at least one slide element bears against the circumferential wall of the pumping chamber by the spring force, even at low rotational speeds.
- the pumping chamber is divided into function in an inlet, an outlet and a sealing sector.
- the inlet sector at least one fluid inlet opening is arranged, which is fluidically connected in the installed state of the gas pump, for example, with a vacuum chamber of a brake booster.
- the outlet sector at least one fluid outlet opening is arranged, wherein the pumping chamber communicates with the atmospheric outlet via the fluid outlet opening Environment is connected.
- the sealing sector is arranged, in which the pump rotor rests so close to the pump housing that no gas flow between the fluid inlet opening and the fluid outlet opening is possible.
- the at least one fluid outlet opening is slot-shaped.
- the tangential width of the slide element corresponds at least to the tangential width of the slot-like fluid outlet opening, the slot-like fluid outlet opening being oriented such that the entire fluid outlet opening is briefly covered and closed by the slide element.
- the tangential width of the slider element refers to the transverse direction to the linear trajectory of the slider element.
- the tangential width of the slot-like fluid outlet opening is aligned perpendicular to the direction of displacement of the slide element in the slide slot and in the moment in which the slide element covers the fluid outlet opening in the middle.
- the longitudinal axis of the slot-like fluid outlet opening and the longitudinal axis of the slide element share or overlap one another.
- the tangential width of the at least one slide element is slightly larger, preferably at least a few tenths of a millimeter larger than the tangential width of the at least one fluid outlet opening, wherein the fluid outlet opening is covered by overlapping by the at least one slide element.
- the tangential width of the at least one slide element is slightly larger, preferably at least a few tenths of a millimeter larger than the tangential width of the at least one fluid outlet opening, wherein the fluid outlet opening is covered by overlapping by the at least one slide element.
- the at least one slot-like fluid outlet opening has a constant tangential width over its length in its middle part.
- the two end regions of the slot-like fluid outlet opening may be rounded or bevelled.
- the fluid outlet opening may for example be designed such that the tangential width of the fluid outlet opening decreases in the radial direction towards the motor rotor.
- the pumping chamber is associated with a first fluid outlet opening and a second fluid outlet opening in the direction of rotation, wherein at least the first fluid outlet opening is formed like an oblong hole.
- a larger amount of gas can be ejected without resistance from the Pumpfach.
- the pump housing has a valve cover, a lifting ring and a bottom cover.
- the cam ring forms the peripheral surface of the pumping chamber and rests with its one end face the valve cover and with its other end to the bottom cover sealingly.
- the valve cover closes the pump chamber on one side.
- the valve cover preferably has the at least one fluid outlet opening and the bottom element has the fluid inlet opening, wherein a check valve is preferably arranged on the valve cover, which closes the at least one fluid outlet opening and releases the fluid outlet opening when the opening pressure prevails in the pumping hood.
- the length L of the at least one slot-like fluid outlet opening preferably corresponds to the free working space width W in the sliding element longitudinal direction, with the working space width W extending from the outer circumferential surface of the pump rotor to the inner circumference of the pumping chamber defined by the lifting ring.
- FIG. 1 shows an exploded view of a vane-cell gas pump
- FIG. 2 shows a top view of a pump rotor of the vane-cell gas pump from FIG. 1.
- FIGS 1 and 2 show a trained as a so-called vacuum pump vane gas pump 10, which is for example intended for use in a motor vehicle and can generate an absolute pressure of 100 mbar or less.
- the dry-running vane pump 10 has a metal pump housing 20, which encloses a pumping chamber 22.
- the pump housing 20 is essentially composed of a lifting ring 74, a bottom plate 76 and a valve cover 72.
- a pump rotor 30 rotatably arranged.
- the pump rotor 30 has five slide slots 321, 341, 361, 381, 401, in each of which a slide element 32, 34, 36, 38, 40 is slidably mounted.
- the five slide elements 32, 34, 36, 38, 40 divide the pumping chamber 22 into five rotating pumping chambers, each having the same pumping rear angle a of approximately 70 °.
- the pump rotor 30 is driven by an associated electric motor 90.
- the present vane gas pump 10 is a dry-running vane gas pump 10, with no lubricant, such as oil, is introduced into the pumping chamber 22.
- the gas pump 10 therefore has no lubricant connection.
- the components may have another friction reducing composition.
- the pumping chamber 22 can be divided into several sectors, namely an inlet sector 42 with a fluid inlet opening 60, an outlet sector 44 with a first fluid outlet opening 52 and a second fluid outlet opening 54, and a sealing sector 46, seen in the direction of rotation between the outlet sector 44 and the inlet sector 42 is arranged and in which a gas flow over the sealing gap between the pump rotor 30 and the cam ring 74 is prevented from the fluid outlet openings 52, 54 to the fluid inlet port 60.
- the fluid inlet port 60 is formed in the bottom plate 76.
- the two fluid outlet openings 52, 54 are formed in the opposite valve cover 72.
- the first fluid outlet opening 52 is in Direction of rotation of the pump rotor 30 seen before the second fluid outlet opening 54 arranged.
- the first fluid outlet 52 is fluidly associated with a check valve 70, wherein the check valve 70 is a reed valve and a valve tongue 80 and a Wegbegrenzer 82, both of which are fixedly mounted or screwed to the valve cover 72.
- the first fluid outlet opening 52 is slot-shaped.
- the tangential width Bl of the slide elements 32, 34, 36, 38, 40 corresponds at least to the tangential width B2 of the fluid outlet opening 52, wherein the slot-like fluid outlet opening 52 is aligned such that the first fluid outlet opening 52 in predefined rotor positions of one of the slide elements 32, 34, 36, 38, 40 are completely concealed and thus completely closed in this way for a short time.
- the longitudinal axis of the closed fluid outlet opening 52 and the longitudinal axis of the corresponding slide element 32, 34, 36, 38, 40 have a common identical Focus on.
- the air is sucked by the rotation of the pump rotor 30 through the fluid inlet opening 60 in the respective Pumpfach and ejected through the two fluid outlet openings 52, 54 from the further rotating Pumpfach.
- the first fluid outlet opening 52 is released, and the air is expelled through the first fluid outlet opening 52.
- the air is expelled through the second fluid outlet port 54 as soon as the respective puffach reaches it.
- the flow area of the fluid outlet 52 is large enough to allow the air practically without resistance flow out of the Pumpfach, so that the slide elements 32, 34, 36, 38, 40 no additional mechanical stress in experienced tangential direction.
- a short circuit between two adjacent pump wells is also prevented, since the slide elements 32, 34, 36, 38, 40 completely cover and close the fluid outlet openings 52, 54 temporarily.
- the return flow losses are therefore equal to zero here. In this way, the wear of the slider elements 32, 34, 36, 38, 40 is reduced, without the pneumatic efficiency of the vane-gas pump 10 is reduced.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2017/052167 WO2018141381A1 (de) | 2017-02-01 | 2017-02-01 | Flügelzellen-gaspumpe |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3577342A1 true EP3577342A1 (de) | 2019-12-11 |
Family
ID=58108575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17706691.7A Pending EP3577342A1 (de) | 2017-02-01 | 2017-02-01 | Flügelzellen-gaspumpe |
Country Status (5)
Country | Link |
---|---|
US (1) | US11261868B2 (de) |
EP (1) | EP3577342A1 (de) |
JP (1) | JP2020506332A (de) |
CN (1) | CN110234883B (de) |
WO (1) | WO2018141381A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11261869B2 (en) * | 2016-06-22 | 2022-03-01 | Pierburg Pump Technology Gmbh | Motor vehicle vacuum pump arrangement |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1553283A1 (de) | 1964-08-17 | 1969-09-25 | Zahnradfabrik Friedrichshafen | Fluegelzellen-Kapselwerk |
JPS56129795A (en) * | 1980-03-12 | 1981-10-12 | Nippon Soken Inc | Rotary compressor |
JPS62247194A (ja) | 1986-04-21 | 1987-10-28 | Honda Motor Co Ltd | ベ−ン式回転圧縮機 |
JPS62265483A (ja) | 1986-05-14 | 1987-11-18 | Hitachi Ltd | 回転ベ−ン式真空ポンプ |
EP2568180B1 (de) | 2011-09-12 | 2019-11-13 | Pierburg Pump Technology GmbH | Flügelzellenpumpe |
JP5828863B2 (ja) | 2012-08-22 | 2015-12-09 | カルソニックカンセイ株式会社 | 気体圧縮機 |
CN104995409A (zh) | 2012-11-16 | 2015-10-21 | 莫戈公司 | 叶轮泵和操作该叶轮泵的方法 |
JP6200164B2 (ja) | 2013-02-22 | 2017-09-20 | Kyb株式会社 | 可変容量型ベーンポンプ |
WO2016104652A1 (ja) | 2014-12-24 | 2016-06-30 | ナブテスコオートモーティブ 株式会社 | 真空ポンプ |
US11261869B2 (en) * | 2016-06-22 | 2022-03-01 | Pierburg Pump Technology Gmbh | Motor vehicle vacuum pump arrangement |
DE102017128972A1 (de) * | 2017-12-06 | 2019-06-06 | Joma-Polytec Gmbh | Vakuumpumpe |
-
2017
- 2017-02-01 WO PCT/EP2017/052167 patent/WO2018141381A1/de unknown
- 2017-02-01 EP EP17706691.7A patent/EP3577342A1/de active Pending
- 2017-02-01 US US16/481,489 patent/US11261868B2/en active Active
- 2017-02-01 CN CN201780085357.6A patent/CN110234883B/zh active Active
- 2017-02-01 JP JP2019562461A patent/JP2020506332A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
CN110234883B (zh) | 2021-04-13 |
WO2018141381A1 (de) | 2018-08-09 |
JP2020506332A (ja) | 2020-02-27 |
US11261868B2 (en) | 2022-03-01 |
US20190345943A1 (en) | 2019-11-14 |
CN110234883A (zh) | 2019-09-13 |
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Legal Events
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17Q | First examination report despatched |
Effective date: 20211222 |