EP2118491A1 - Pump, particularly vane pump - Google Patents
Pump, particularly vane pumpInfo
- Publication number
- EP2118491A1 EP2118491A1 EP08707221A EP08707221A EP2118491A1 EP 2118491 A1 EP2118491 A1 EP 2118491A1 EP 08707221 A EP08707221 A EP 08707221A EP 08707221 A EP08707221 A EP 08707221A EP 2118491 A1 EP2118491 A1 EP 2118491A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- pump according
- reibradwelle
- ring gear
- rotor
- 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.)
- Withdrawn
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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/06—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
-
- 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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/08—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the rotational speed
-
- 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
- F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
- F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
-
- 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
- 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
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/05—Speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H15/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members
- F16H15/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members without members having orbital motion
- F16H15/04—Gearings providing a continuous range of gear ratios
- F16H15/06—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B
- F16H15/08—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B is a disc with a flat or approximately flat friction surface
- F16H15/10—Gearings providing a continuous range of gear ratios in which a member A of uniform effective diameter mounted on a shaft may co-operate with different parts of a member B in which the member B is a disc with a flat or approximately flat friction surface in which the axes of the two members cross or intersect
Definitions
- the invention relates to a pump, in particular a vane pump or a vacuum pump, with a rotatable rotor which is driven by a drive shaft.
- the object of the invention is to provide a pump according to the preamble of claim 1, which allows a reduced energy consumption.
- the object is achieved in a pump, in particular a vane pump or a vacuum pump with a rotatable rotor, which is driven by a drive shaft, characterized in that the rotor via a friction gear with the drive shaft can be coupled or coupled.
- the friction gear allows in a simple manner a switchability and / or a speed control of the pump. On demand switching on and off of the pump as well as on-demand speed control can significantly reduce the power consumption of the pump. By a speed ratio to increase the idle speed of an internal combustion engine also a reduction of the pump size can be achieved.
- a preferred embodiment of the pump is characterized in that the friction gear comprises a Reibradwelle which is rotatably connected at one end to the rotor, but limited in the axial direction relative to the rotor is displaced.
- the term axial direction in connection with the friction wheel shaft refers to the axis of rotation of the friction wheel shaft.
- a further preferred embodiment of the pump is characterized in that at the other end of the Reibradwelle an adjusting device is provided, by means of which the Reibradwelle is displaceable in the axial direction.
- the adjustment device may include a drive motor that is mechanically coupled to the friction wheel shaft.
- the adjusting device operates pneumatically or hydraulically.
- the adjusting device comprises a piston which is provided at the other end of the Reibradwelle and arranged in a cylinder space.
- the piston may be integrally connected to the Reibradwelle.
- the other end of the friction wheel shaft itself forms the piston.
- the piston can be moved with the Reibradwelle in a- xialer direction and / or forth.
- Another preferred embodiment of the pump is characterized in that the cylinder chamber can be acted upon by negative pressure.
- the negative pressure causes the piston to move into the cylinder space.
- a further preferred embodiment of the pump is characterized in that the cylinder chamber is in communication with a vacuum chamber of a brake booster.
- the pump is a vacuum pump which serves to generate a vacuum in a vacuum chamber of a brake booster of a motor vehicle.
- a further preferred embodiment of the pump is characterized in that the frictional engagement required for torque transmission, as soon as the negative pressure falls below a predetermined limit, is interrupted in order to stop the pump. This has the advantage that no energy is consumed, as long as the existing negative pressure sufficient to ensure proper operation of the brake booster. As the pressure increases, the pump is switched on again.
- a further preferred embodiment of the pump is characterized in that the piston is biased by a pressure spring device arranged in the cylinder space is. By the bias of the compression spring means, the piston can be brought into a defined starting position or reset.
- a further preferred embodiment of the pump is characterized in that the Reibradwelle cooperates with a centrifugal force adjustment.
- the centrifugal force adjustment device serves to keep the rotor speed within an optimal range.
- a further preferred embodiment of the pump is characterized in that the Reibradwelle has a friction wheel which is frictionally connected to the torque transfer or connected to a ring gear.
- a further preferred embodiment of the pump is characterized in that the ring gear is rotatably connected to the drive shaft. This allows the transmission of torque from the drive shaft to the ring gear.
- a further preferred embodiment of the pump is characterized in that the ring gear is limited in the axial direction relative to the drive shaft displaced.
- the term axial direction refers in connection with the ring gear on the axis of rotation of the ring gear.
- the axis of rotation of the ring gear coincides with the axis of rotation of the drive shaft.
- Another preferred embodiment of the pump is characterized in that the ring gear is pressed by a spring means in the axial direction against the friction wheel. As a result, a friction transmission required for torque transmission is maintained.
- the ring gear has a central recess.
- the central recess in the ring gear serves to selectively interrupt the frictional engagement and thus the torque transmission between the friction wheel and the ring gear.
- a further preferred embodiment of the pump is characterized in that the ring gear and / or the friction wheel have / have a conical friction surface. Thereby, the frictional engagement can be improved, especially at high speeds.
- Another preferred embodiment of the pump is characterized in that the axis of rotation of the Reibradwelle is arranged perpendicular to the axis of rotation of the drive shaft. This arrangement has proved to be particularly advantageous in the context of the present invention.
- Figure 1 shows an embodiment of a pump according to the invention, which is driven by a drive shaft with the interposition of a friction gear and
- Figure 2 is a similar view as in Figure 1 according to another embodiment.
- a pump 1 is shown simplified in section.
- the pump 1 is a vane pump. But it may also be another positive displacement pump, such as a roller-cell pump or a gear pump act. Such pumps are used, for example, as vacuum pumps in conjunction with brake boosters in motor vehicles.
- the vane pump 1 comprises an only indicated pump housing 3 with a stroke contour, which is arranged between two side surfaces.
- a rotor 4 is rotatably arranged in the pump housing 3.
- In the rotor at least one slot is recessed in which a wing 5 is arranged radially displaceable.
- the rotor 4 is rotatable about an axis of rotation 6 and mounted eccentrically within the stroke contour.
- the rotor, the stroke contour and the housing side surfaces together with the wing define at least one displacement chamber whose volume changes when the rotor Tor is turning. It comes in at least one suction chamber or low pressure chamber to an increase in volume, which causes a suction of a working fluid. At the same time it comes in at least one pressure chamber to a decrease in volume, which causes a conveying of the working fluid from the pressure chamber.
- the rotor 4 is coupled via a coupling device 8 with a friction gear 9.
- the friction gear 9 comprises a Reibradwelle 10 which is rotatably connected to the rotor 4.
- the axis of rotation of Reibradwelle 10 coincides with the axis of rotation 6 of the rotor 4.
- the rotationally fixed connection between the rotor 4 and the Reibradwelle 10 is designed so that the Reibradwelle 10 in the axial direction, that is in the direction of the axis of rotation 6, is limited displaced.
- a friction wheel 12 is attached at the Reibradwelle 10.
- the friction wheel 12 is integrally connected to the Reibradwelle 10.
- the friction wheel 12 may also be rotatably connected to the Reibradwelle 10, for example by a shaft-hub connection.
- the ring gear 14 is rotatably connected by a positive connection 15 with a shaft journal 18 of a drive shaft 20.
- the drive shaft 20 and the ring gear 14 are rotatable about an axis of rotation 22 which is perpendicular to the axis of rotation 6 of the Reibradwelle 10 and the rotor 4 is arranged.
- the shaft journal 18 is bounded by a shoulder 21 on the drive shaft 20.
- a spring device 23 is clamped.
- the spring device 23 is a helical compression spring which serves to press the ring gear 14 against the friction wheel 12 in such a way that the frictional engagement between the friction wheel 12 and the ring gear 14 required for torque transmission is maintained.
- the adjusting device 30 comprises a piston 31, which is formed on the rotor 4 remote from the end of the Reibradwelle 10.
- the piston 31 in a housing part 34, a cylinder space 32 is adjacent.
- the housing part 34 is stationary relative to the friction wheel shaft 10.
- the piston 31 is guided in the housing part 34 movable back and forth.
- a spring means 35 is arranged in the cylinder chamber 32.
- the spring device 35 is a helical compression spring, which is clamped in the axial direction between the housing part 34 and the piston 31.
- Via a connecting piece 36 of the cylinder chamber 32 communicates with a vacuum chamber of a brake booster in combination, as indicated by an arrow 38.
- the application of negative pressure in the cylinder chamber 32 causes the piston 31 is moved with the Reibradwelle 10 away from the rotor 4. In this case, the ratio between the friction wheel 12 and the ring gear 14 changes.
- the ring gear 14 has a central recess 40 which serves to selectively interrupt the frictional engagement between the friction wheel 12 and the ring gear 14 in order to effect a shutdown of the pump 1.
- the dimensions of the recess 40 are matched with the biasing force of the spring device 23, that the frictional engagement between the friction wheel 12 and ring gear 14 is interrupted when the friction wheel 12 is arranged in the region of the central recess 40.
- the invention makes it possible to control the speed of the pump rotor 4 in a simple manner.
- the speed is reduced with increasing negative pressure in the brake booster.
- the frictional connection to the drive is completely interrupted when the friction wheel 12 is displaced into the central recess 40 of the ring gear 14.
- the pump is switched on again.
- the speed is not increased abruptly to the maximum speed, but rises gently. Therefore, the noise level when switching can be kept small.
- the Reibradwelle 10 can be additionally provided with a (not shown) centrifugal force adjustment.
- FIG. 2 shows a pump 41, which is similar to the pump 1 in FIG. To denote the same parts, the same reference numerals are used. To avoid repetition, reference is made to the preceding description of FIG. In the following, the differences between the two embodiments are mainly discussed.
- the pump 41 shown in FIG. 2 comprises a friction wheel 42, which has a conical friction surface 48.
- the cone angle of the friction surface 48 is adapted to the cone angle of a likewise conical friction surface 46 of a ring gear 44.
- the conical friction surfaces 46, 48 the frictional engagement between the friction wheel 42 and the ring gear 44 can be improved. In particular, at high speeds thereby the biasing force of the spring 23 is increased.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007006297 | 2007-01-31 | ||
PCT/EP2008/000508 WO2008092593A1 (en) | 2007-01-31 | 2008-01-24 | Pump, particularly vane pump |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2118491A1 true EP2118491A1 (en) | 2009-11-18 |
Family
ID=39246854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08707221A Withdrawn EP2118491A1 (en) | 2007-01-31 | 2008-01-24 | Pump, particularly vane pump |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2118491A1 (en) |
DE (1) | DE112008000185A5 (en) |
WO (1) | WO2008092593A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010039920A1 (en) * | 2010-08-30 | 2012-03-01 | Robert Bosch Gmbh | Pump for a high pressure system |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2691482A (en) | 1952-07-17 | 1954-10-12 | Equi Flow Inc | Method and apparatus for compressing and expanding gases |
JPS6014947B2 (en) * | 1976-10-22 | 1985-04-16 | 豊田工機株式会社 | Automatic pressurization device for continuously variable transmission |
DE3031986A1 (en) | 1980-08-25 | 1982-04-01 | Pierburg Gmbh & Co Kg, 4040 Neuss | Vacuum pump for vehicle brakes - has variable speed drive to maintain constant vacuum at all engine speeds |
FR2754327A1 (en) | 1996-10-04 | 1998-04-10 | Salah Amirou | Friction gearbox for automobiles |
DE19854243C2 (en) * | 1998-11-24 | 2000-10-19 | Luk Automobiltech Gmbh & Co Kg | Control for a vacuum pump |
DE10059422A1 (en) | 2000-11-30 | 2002-06-06 | Bosch Gmbh Robert | Device for conveying liquids, in particular fuel |
JP2005307835A (en) | 2004-04-20 | 2005-11-04 | Toyota Industries Corp | Compressor with transmission |
-
2008
- 2008-01-24 EP EP08707221A patent/EP2118491A1/en not_active Withdrawn
- 2008-01-24 WO PCT/EP2008/000508 patent/WO2008092593A1/en active Application Filing
- 2008-01-24 DE DE112008000185T patent/DE112008000185A5/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2008092593A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2008092593A1 (en) | 2008-08-07 |
DE112008000185A5 (en) | 2010-02-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20090801 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: DEIPENWISCH, ROBERT Inventor name: HOESCHEN, DANIEL |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20100706 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: IXETIC HUECKESWAGEN GMBH |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: MAGNA POWERTRAIN HUECKESWAGEN GMBH |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20150801 |