EP3374640A1 - Elektrische-kfz-vakuumpumpe - Google Patents
Elektrische-kfz-vakuumpumpeInfo
- Publication number
- EP3374640A1 EP3374640A1 EP15794896.9A EP15794896A EP3374640A1 EP 3374640 A1 EP3374640 A1 EP 3374640A1 EP 15794896 A EP15794896 A EP 15794896A EP 3374640 A1 EP3374640 A1 EP 3374640A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- vacuum pump
- opening
- inlet
- electric vehicle
- 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
- 238000005086 pumping Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 16
- 238000002485 combustion reaction Methods 0.000 description 2
- 208000000223 Solitary Kidney Diseases 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
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
- 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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/04—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for reversible pumps
Definitions
- the present invention relates to an electric automotive vacuum pump with a brushless, electronically commutated, sensorless drive motor.
- the electric vehicle vacuum pump has a pump housing, which forms a pump space in which a pump rotor rotates in a compressing manner.
- the pump rotor can be rotated in both a forward and a reverse direction.
- the automotive electric vacuum pump further includes exhaust and intake ports for forward and reverse rotational directions of the rotor.
- An electric vehicle vacuum pump generates in a motor vehicle (motor vehicle), independently of the operating state of an internal combustion engine, a negative pressure of, for example, 100 millibars, which is required, for example, for operating a pneumatic brake booster and / or other pneumatically operated ancillaries.
- the electric power of the drive motor is typically in the range of 100 W for small vacuum pumps and several 100 W for large vacuum pumps.
- brush motors are preferably used due to the low manufacturing costs compared to electronically commutated motors. Due to the constantly abrasive contact of the brushes on the slip ring wear and a large heat development. A brush motor therefore has a limited maximum runtime.
- the object of the present invention is therefore to provide an electric vehicle vacuum pump, which has a longer duration and despite all this is inexpensive to produce. This object is achieved by an electric vehicle vacuum pump according to the independent claim 1.
- the drive motor is formed by a brushless, electronically commutated, sensorless drive motor.
- sensors in the context of the invention are understood here as sensors, which is usually used for brushless, electronically commutated drive motors to detect the position of the rotor, in particular at a start of the drive motor. In the present invention, however, these sensors are not used, so that costs can be saved in this regard.
- the vacuum pump or the drive motor is sensorless with respect to the commutation, that is equipped without rotor position sensors. As a result, there is a general danger that the rotor can be approached in both directions.
- inlet and outlet openings are provided both for a forward and backward direction of rotation.
- the electric vacuum pump is preferably symmetrical, the efficiency of the vacuum pump is the same in the forward and reverse directions. Since an electronically commutated drive motor operates without contact with the rotor, there is no mechanical wear and no commutator heat buildup. The life of the electric vacuum pump is thus significantly increased, despite low costs.
- the outlet opening is provided in the rotational direction of the rotor immediately before a separating section, in which the Pump rotor fluidly sealingly against a pump room wall. In this way, a maximum amount of fluid can be discharged. The efficiency of the vacuum pump is high in both directions.
- the inlet opening is provided in the direction of rotation immediately after a separating section, in which the pump rotor is sealingly abutting a pump chamber wall in a fluid-sealing manner. This allows a maximum amount of fluid to be sucked. The efficiency of the vacuum pump is thus increased.
- the separating portion is formed as a Schmiegespalt.
- Schmiegespalt in the context of the invention, a circumferential Abschnltt understood in the pump chamber wall, which is in contact with a rotor outer surface and having the same radius as the rotor.
- the vacuum pump is an oil-lubricated pump.
- Such a pump has the advantage that this pump is inexpensive to produce due to the relatively simple design. The oil lubrication improves the pneumatic sealing and the pneumatic efficiency and reduces the wear.
- the vacuum pump is designed in a further preferred embodiment as a dry-running pump. Drying in the sense of the invention is understood to mean that the rotor is not lubricated with oil. This has the advantage of being operational no additional oil supply must be provided, and that no oil must be separated from the compressed fluid.
- the pump has, according to a preferred embodiment of the invention, at least one slide, which forms two wings.
- the pump according to a preferred embodiment of the invention on five wings, which are formed by five slides.
- the forward exhaust opening and the rearward inlet opening are formed by a single opening.
- a division of the flow paths in the inlet flow and the outlet flow is, seen in the outlet direction, provided behind the opening.
- the forward inlet port and the rearward outlet port are formed by a single port.
- a division of the flow paths in the inlet flow and the outlet flow is, as seen in the outlet direction, provided only behind the opening.
- only a single opening in an end wall of the pump housing must be provided for the forward inlet opening and the rearward outlet opening.
- the slide of the pump is made of plastic.
- Plastic has the advantage that it is easy and inexpensive to produce.
- the slider is made of a graphite-based material. Further details and advantages of the present invention will become apparent from the following description of the embodiment in conjunction with the drawings. In these show:
- FIG. 1 Schematic representation of an electric automotive vacuum pump according to the present invention.
- FIG. 2 shows a section through the pump housing of the electric vehicle vacuum pump according to FIG. 1.
- an electric automotive vacuum is shown to pump 10, which serves in a motor vehicle, the provision of vacuum with an absolute pressure of, for example, 100 millibar and lower.
- the vacuum is mainly used as potential energy for actuators, such as a pneumatic brake booster or other pneumatic automotive actuators.
- An electric drive for automotive vacuum pumps is increasingly required because the automotive internal combustion engine is not constantly running during vehicle operation.
- the electric vehicle vacuum pump 10 has a pump housing 12 and a brushless, electronically commutated, sensorless drive motor 13.
- This drive motor 13 drives via a shaft 14 a pump rotor 18 provided in a pump chamber 16 formed by the pump housing 12.
- two fluid inlet lines 20i, 20 2 and two fluid outlet lines 22 t , 22 2 are formed.
- the two fluid outlet lines 22i, 22 2 are combined in the outlet direction in the pump housing 12 to form a common Monfluidausmik 24.
- the two fluid inlet lines 20i, 20 2 are branched in the inlet direction in the pump housing 12 from a total fluid inlet line 26.
- check valves 30i, 302 which lock in an outlet direction and release a fluid flow in an inlet direction.
- FIG. 2 shows the pump housing 12 with the pumping space 16 formed therein.
- the pump rotor 18 is provided eccentrically to the pumping space 16 and is rotatable in both a forward and a reverse direction.
- a forward direction is understood to mean a direction of rotation of the pump rotor 18 shown in FIG. 2, which rotates in the counterclockwise direction. Accordingly, a rotational direction of the pump rotor 18 shown in FIG. 2 in the clockwise direction is a reverse direction.
- This pump rotor 18 is designed as a rotary valve.
- the rotary valve is formed from a rotor body 32 and a slider 34 which is orthogonal to a rotational axis 33 of the pump rotor 18 by a center of the rotor body 32 is movable and forms two wings.
- the slider 34 has ends 36 which form the blade ends and are in constant contact with a pumping chamber wall 38 during rotation of the pump rotor 18.
- the rotor body 32 is arranged eccentrically in the pumping space 16 in such a way that a rotor outer surface 40 of the pump rotor 18 rests in a fluid-tight manner against the pumping space wall 38, and thus forms a separating section 42.
- a single kidney-shaped opening 46, 47 is provided immediately before and after the separating section 42, which serves as an inlet or outlet opening 46, 47 depending on the running direction of the pump rotor 18.
- Each opening 46, 47 is fluidly connected to a pump inlet 48 via a respective one of the fluid inlet lines 20i, 20 2 . Every opening 46, 47 is also fluidly connected via a respective one of the fluid outlet lines 22 if 22 2 with a pump outlet 49.
- the opening 46, 47 which lies in the direction of rotation immediately before the separating section 42, serves as an outlet opening and the opening 46, 47 which lies in the direction of rotation immediately after the separating section, as an inlet opening.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2015/076406 WO2017080599A1 (de) | 2015-11-12 | 2015-11-12 | Elektrische-kfz-vakuumpumpe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3374640A1 true EP3374640A1 (de) | 2018-09-19 |
EP3374640B1 EP3374640B1 (de) | 2024-03-06 |
Family
ID=54545126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15794896.9A Active EP3374640B1 (de) | 2015-11-12 | 2015-11-12 | Elektrische-kfz-vakuumpumpe |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3374640B1 (de) |
WO (1) | WO2017080599A1 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB564668A (en) * | 1943-05-13 | 1944-10-09 | William Wilson Hamill | Improvements in gear wheel pumps for liquids |
AT399922B (de) * | 1989-06-05 | 1995-08-25 | Weber Gisela | Zahnradpumpe für rechts- und linkslauf |
DE102007022216A1 (de) * | 2007-05-11 | 2008-11-13 | Robert Bosch Gmbh | Hydrauliksystem mit Zahnradpumpe |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4598559A (en) * | 1985-05-31 | 1986-07-08 | Carrier Corporation | Reversible fixed vane rotary compressor having a reversing disk which carries the suction port |
DE102004024554B4 (de) * | 2004-05-18 | 2018-01-25 | Pfeiffer Vacuum Gmbh | Ölgedichtete Drehschiebervakuumpumpe |
US7491037B2 (en) * | 2005-08-05 | 2009-02-17 | Edwards Thomas C | Reversible valving system for use in pumps and compressing devices |
-
2015
- 2015-11-12 EP EP15794896.9A patent/EP3374640B1/de active Active
- 2015-11-12 WO PCT/EP2015/076406 patent/WO2017080599A1/de active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB564668A (en) * | 1943-05-13 | 1944-10-09 | William Wilson Hamill | Improvements in gear wheel pumps for liquids |
AT399922B (de) * | 1989-06-05 | 1995-08-25 | Weber Gisela | Zahnradpumpe für rechts- und linkslauf |
DE102007022216A1 (de) * | 2007-05-11 | 2008-11-13 | Robert Bosch Gmbh | Hydrauliksystem mit Zahnradpumpe |
Non-Patent Citations (1)
Title |
---|
See also references of WO2017080599A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2017080599A1 (de) | 2017-05-18 |
EP3374640B1 (de) | 2024-03-06 |
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