EP2249040A2 - Verbesserte Einschaufelvakuumpumpe - Google Patents
Verbesserte Einschaufelvakuumpumpe Download PDFInfo
- Publication number
- EP2249040A2 EP2249040A2 EP10160464A EP10160464A EP2249040A2 EP 2249040 A2 EP2249040 A2 EP 2249040A2 EP 10160464 A EP10160464 A EP 10160464A EP 10160464 A EP10160464 A EP 10160464A EP 2249040 A2 EP2249040 A2 EP 2249040A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- vane
- vacuum pump
- rotor
- curved ends
- chamber
- 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
Links
Images
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
- 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
- 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
-
- 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
Definitions
- the present invention relates to an improved single vane rotary vacuum pump which is particularly, though not exclusively, for use in automotive applications.
- the invention further relates to an improved vane for a single vane rotary vacuum pump.
- a static casing having an inlet and an outlet defines a chamber divided by a vane slidably supported by a rotor.
- the vane turns with it and moves through the rotor in order to maintain a close fit with the casing wall at each of its ends, any gap between the vane and the wall being sealed with oil.
- a vacuum is created, causing air to enter the chamber through the inlet. This air is then discharged through the outlet as the vane turns.
- the single vane components of such vacuum pumps are typically manufactured from two different materials, with one material being used for the body of the vane and a second material being used for the tips. Both materials may be plastic.
- This arrangement means that the vane requires assembly during manufacture and this can add to the production cost.
- the rotors for such pumps are usually manufactured from sintered steel.
- a vacuum pump comprising a casing defining a chamber, a rotor rotatably mounted within the chamber and a vane slidably mounted in a slot in the rotor, the vane having a planar centre portion and curved ends terminating in respective tips, wherein the curved ends are turned towards one another and each curved end has a contact portion which contacts the wall of the chamber, wherein the contact portion at each end is intermediate the centre portion and the respective tip of the vane.
- the vane is preferably formed from a single piece of material.
- the rotor slot may be offset from the centre of the rotor, and the rotor may comprise cut-outs configured to fully receive respective curved ends of the vane, advantageously preventing the curved ends of the vane from projecting from the rotor and becoming wedged against the chamber wall.
- the centre point of the radius of curvature of each curved end may be aligned with the axis of rotation of the rotor.
- the radius of curvature of each curved end of the vane may be constant.
- the vane may be manufactured from steel.
- a vane for a vacuum pump formed from a single piece of material, comprising a planar centre portion and curved ends terminating in respective tips, wherein the curved ends are turned towards one another and each curved end has a contact portion which in use contacts the chamber wall of a vacuum pump, wherein the contact portion at each end is intermediate the centre portion and the respective tip of the vane.
- the curved ends of the vane may have a constant radius of curvature.
- the vane may be manufactured from steel.
- the vacuum pump generally designated 10, which pump 10 includes a casing 12, a rotor 26 and a vane 40.
- the casing 12 defines a chamber 14 with a flat base 16 having a limacon-like shape which is surrounded by a perpendicular wall 18.
- the chamber 14 has an inlet 20 and an outlet 22 (shown in figure 2 ), both of which may be located on the wall 18, and a rotor aperture 24 (see figure 3 ) in an off-centre position in the base 16.
- the casing 12 further comprises a chamber cover (not shown) which serves to fully encapsulate the chamber 14.
- the rotor 26 is substantially cylindrical and includes a central bore 28, two cut-outs 30 and a slot 32.
- the rotor 26 consists of a first portion 34 and a second portion 36 having a similar diameter than the first portion (see figure 3 ) whereby the rotor 26 is mounted on the casing 12 in the rotor aperture 24.
- the rotor aperture 24 allows the rotor 26 to project through the casing 12 and connect with a drive (not shown).
- the cut-outs 30 are substantially rectangular in cross section and are positioned at opposing points on the circumference of the rotor 26, extending throughout the length of the first portion 34.
- a line A-A (see figure 2 ) which passes through the centre point of the rotor 26 continues through the centre of each cut-out 30.
- the slot 32 is parallel to the line A-A and extends throughout the first portion 34.
- the vane 40 comprises a rectangular planar body 42 with curved ends 44, the ends 44 turning towards one another through approximately 140° as illustrated, so that when viewed from the side the vane may be considered to be U- or C-shaped.
- the curved ends terminate at respective tips 48 of the vane 40.
- This angle is not intended to be limiting as different curves may be utilised.
- the vane 40 is slidably mounted in the slot 32, perpendicular to the base 16 and with the ends 44 positioned so that they curve towards the centre of the rotor 26.
- the centre points of the radius of curvature of the ends 44 are aligned with the axis of rotation of the rotor 26, as indicated by line A-A.
- the vane 40 is of sufficient length that the outermost point of each end 44 has a line of contact with the wall 18 at all rotational positions, except at the position shown in figure 2 where one end of the vane 40 is fully received into a cut-out 30.
- the vane 40 is turned by the rotor 26 in the direction X in relation to the casing 12.
- the off-centre positioning of the rotor 26 causes the vane 40 to slide through the slot 32 as it is turned.
- the ends 44 of the vane 40 constantly remain in contact with the wall 18 of the chamber 14, creating two compartments 46 of changing size which may include the inlet, the outlet or both or neither of those.
- each end 44 of the vane 40 recedes into its respective cut-out 30 on the rotor 26 when necessary, that is when at the section of wall 18 closest to the rotor 26.
- the rotational position of the vane 40 creates a compartment 46 which includes the inlet and does not include the outlet.
- the size of this compartment 46 is increased, creating a vacuum and causing air to be drawn into it via the inlet. This air is discharged through the outlet 22 once the vane 40, continuing to turn, isolates the compartment 46 from the inlet and connects the component 46 to the outlet.
- the vane 40 is manufactured from metal, for example steel and may be of unitary construction formed by bending or extrusion. In an alternative, less preferred, embodiment the vane 40 may be fabricated from two or more sections of the same material.
- the rotor 26 is made of steel and may be laser cut.
- the vacuum pump 10 of the present invention allows the vane 40 to be produced from a single piece of steel, making it easier and less expensive to produce than existing vanes. This also makes the vane 40 stronger, an advantage for cold start conditions and reverse rotation.
- the curved ends 44 of the vane 40 ensure a single line of contact between the vane 40 and the wall 18. Due to the changes in curvature of the wall 18 of the chamber 14, it will be understood that the aforementiond contact line moves around the curved end of the vane 40 during rotation thereof.
- the vane 40 could be manufactured from a single piece of some other material, for example a composite.
- the casing 12 could contain multiple inlets or outlets.
- the cut-outs 30 may be of a range of different shapes.
- Alternative mounting means for the rotor 26 may be provided.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0907606A GB0907606D0 (en) | 2009-05-01 | 2009-05-01 | Improved monovane vacuum pump |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2249040A2 true EP2249040A2 (de) | 2010-11-10 |
EP2249040A3 EP2249040A3 (de) | 2013-07-10 |
EP2249040B1 EP2249040B1 (de) | 2015-01-07 |
Family
ID=40792181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10160464.3A Active EP2249040B1 (de) | 2009-05-01 | 2010-04-20 | Verbesserte Einschaufelvakuumpumpe |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2249040B1 (de) |
CN (1) | CN201827077U (de) |
GB (1) | GB0907606D0 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2987951A1 (de) * | 2014-08-22 | 2016-02-24 | WABCO Europe BVBA | Vakuumpumpe mit exzentrisch angetriebenem Flügel |
US10837283B2 (en) | 2015-11-13 | 2020-11-17 | Wabco Europe Bvba | Vacuum pump with eccentrically driven vane (eccentric pump design with crank pin) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105090035A (zh) * | 2015-07-24 | 2015-11-25 | 裕克施乐塑料制品(太仓)有限公司 | 一种带油槽的真空泵叶片及真空泵 |
DE102016003662B4 (de) * | 2016-03-30 | 2023-06-22 | Zf Cv Systems Hannover Gmbh | Druckluftversorgungsanlage |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2241129C1 (ru) * | 2003-09-10 | 2004-11-27 | Шаруденко Андрей Юрьевич | Роторная машина (варианты), рабочий орган для роторной машины и двигательная установка с ее использованием |
EP1825146A1 (de) * | 2004-11-27 | 2007-08-29 | LuK Automobiltechnik GmbH & Co. KG | Pumpe |
DE102006016242B3 (de) * | 2006-03-31 | 2007-09-20 | Joma-Hydromechanic Gmbh | Rotorpumpe |
AT505061B1 (de) * | 2007-03-30 | 2008-12-15 | Tcg Unitech Systemtechnik Gmbh | Drehschieberpumpe |
-
2009
- 2009-05-01 GB GB0907606A patent/GB0907606D0/en not_active Ceased
-
2010
- 2010-04-20 EP EP10160464.3A patent/EP2249040B1/de active Active
- 2010-04-30 CN CN2010201861575U patent/CN201827077U/zh not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
None |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2987951A1 (de) * | 2014-08-22 | 2016-02-24 | WABCO Europe BVBA | Vakuumpumpe mit exzentrisch angetriebenem Flügel |
WO2016026556A1 (en) * | 2014-08-22 | 2016-02-25 | Wabco Europe Bvba | Vacuum pump with eccentrically driven vane (eccentric pump design) |
CN106536855A (zh) * | 2014-08-22 | 2017-03-22 | 威伯科欧洲有限责任公司 | 带有偏心驱动叶片的真空泵(偏心泵设计) |
US9803642B2 (en) | 2014-08-22 | 2017-10-31 | Wabco Europe Bvba | Vacuum pump with eccentrically driven vane (eccentric pump design) |
CN106536855B (zh) * | 2014-08-22 | 2019-06-04 | 威伯科欧洲有限责任公司 | 带有偏心驱动叶片的真空泵 |
US10837283B2 (en) | 2015-11-13 | 2020-11-17 | Wabco Europe Bvba | Vacuum pump with eccentrically driven vane (eccentric pump design with crank pin) |
Also Published As
Publication number | Publication date |
---|---|
CN201827077U (zh) | 2011-05-11 |
EP2249040A3 (de) | 2013-07-10 |
GB0907606D0 (en) | 2009-06-10 |
EP2249040B1 (de) | 2015-01-07 |
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