EP0068035A1 - Pompe à palettes en particulier pour direction assistée - Google Patents
Pompe à palettes en particulier pour direction assistée Download PDFInfo
- Publication number
- EP0068035A1 EP0068035A1 EP19810104981 EP81104981A EP0068035A1 EP 0068035 A1 EP0068035 A1 EP 0068035A1 EP 19810104981 EP19810104981 EP 19810104981 EP 81104981 A EP81104981 A EP 81104981A EP 0068035 A1 EP0068035 A1 EP 0068035A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotor
- pressure plate
- cam ring
- inlet
- housing
- 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
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 230000015572 biosynthetic process Effects 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/06—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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
Definitions
- the invention relates to a vane pump, in particular for steering assistance, with a rotor and vanes guided therein, with a shaft for driving the rotor, with a cam ring for the radial drive of the vanes and for determining two working areas for the hydraulic fluid, with a pressure plate for Sealing on the rotor and cam ring and for forming subchannels for an inlet and outlet of the hydraulic fluid to and from the work areas and with a housing for receiving the components and forming channels.
- the hydraulic fluid is usually introduced into the two working areas via housing channels which extend in the circumferential direction of the cam or contour ring, and via short radial channels in the pressure plate in the area between the cam ring and pressure plate.
- the path of the hydraulic fluid is short to one working area and long to the other working area, so that differently good fillings can be achieved.
- the pump housing is pot-shaped and is closed by a simple cover, behind which the pressure chamber of the pump is located.
- the invention is therefore based on the object of designing a vane pump, in particular for steering assistance, of the type specified at the outset in such a way that a reduction in noise compared to known pumps of the same power and a more uniform filling of both working areas is achieved.
- a built power steering pump for pressures in the range of 65 to 82 bar had a total weight that was 400 to 450 g lower than a power steering aid of the same performance.
- the noise emitted could be significantly reduced and the maximum speed increased.
- the vane pump has a main housing part 1 and a housing cover 2, which enclose an inner space 1a in a pressure-tight manner. Sitting in the interior 1a, arranged fixed to the housing. a pressure plate 4 and a cam ring 5, which are secured against rotation by pins 6.
- a rotor 7 is arranged within the cam ring 5 and between the housing cover 2 and the pressure plate 4 and has a number of radial guide slots. Wings 8 ra are within these guide slots dial slidably mounted.
- the rotor 7 can be driven via a shaft 9 which is mounted in a bearing bore in the housing cover 2.
- the rotor 7 is cylindrical in shape, while the cam ring 5 has an approximately oval inner contour, the small axis of which corresponds approximately to the diameter of the rotor 7, while the large axis determines the extension length of the vanes 8.
- the cam ring 5 and the rotor 7 are two crescent-shaped work areas 11 and 12, which are divided into a number of work spaces by the vanes 8. The working spaces increase on the suction side of the system and decrease on the pressure side.
- the supply of hydraulic fluid to the respective suction side is as follows: Recirculated hydraulic fluid is passed below a reservoir 14 into a filter chamber 15, from where the fluid enters an oil reservoir 16 which contains the cam ring 5, the rotor 7, the pressure plate 4 and whose housing support walls surround in a semicircular shape and which is connected to feed channels 18a, 18b via two parallel, vertical bores 17a, 17b (FIG. 2).
- the feed channels 18a, 18b are knee-shaped, lie essentially in the horizontal axis plane and are arranged symmetrically to one another.
- One leg of the feed channels 18a, 18b open in the radial direction into a space 19 aligned with the shaft 9, while the other legs are axially aligned and each meet through openings 20 of the pressure plate 4.
- Circumferential seals 21 seal the gap between the back of the pressure plate 4 and the housing wall 1.
- the through openings 20 expand toward the front of the pressure plate 4 and form a curved, elongated space 22 which extends in the circumferential direction and in which a flow is divided at the same time.
- the arrow 23 in Fig. 3 indicates the flow which passes through the radially inner part of the through opening 20 directly via a first inlet 27 into the space between the cam ring 5 and the rotor 7, while the arrow 24 the radially outer flow through the radially outer part the through opening 20 indicates.
- Three bores 25 in the cam ring form a cam ring channel which extends in the axial direction and abuts a housing groove 26 which directs the flow 24 radially inwards.
- the housing groove 26 is widened at its radially inner end in the circumferential direction and there forms a second inlet 28 into the working area of the pump.
- Arc-shaped grooves 31, 32 are provided in the housing cover 2 and in the pressure plate 4 on both sides of the wing 8.
- the grooves 31 are each connected via holes 33 (FIG. 4) through the cam ring 5 to the grooves 32 (FIG. 1).
- the grooves 32 each include a bore through the pressure plate 4.
- a pressure chamber 35 is formed, which ensures that the pressure plate is in good contact with the rotor 7 and the cam ring 5 and is connected to an outer pump outlet 37 via a delivery channel 36.
- a throttle body 38 with a feed throttle 38a and an auxiliary throttle 38b is located in the feed line 36.
- the auxiliary throttle 38b is connected to a flow control valve 40 via a channel 39.
- the flow control valve 40 has a slide piston 41, which is pushed by the force of a spring 42 in the direction of the back of the pressure plate 4.
- the slide piston has two sealing areas 43, 44, between which there is an annular groove 45, into which the feed channels 18 a, b normally open.
- a partially radially and partially axially extending channel 46 leads from the annular groove 45 through the slide piston 41 into a valve chamber 47, into which the channel 39 opens and in which the spring 42 lies.
- a spring 48 and a valve cone 49 are arranged within the channel 46.
- the operation of the power steering pump proceeds as follows: By driving the shaft 9, the rotor 7 is rotated and the vanes 8 are thus passed through the sickle-shaped working areas. Hydraulic fluid is drawn in, which can enter both flanks of the wings 8, as shown by the arrows 23 and 24 in FIG. 3. The feed takes place in the same way for both work areas via the essentially symmetrical feed channels 18a, 18b. As a result of this "parallel feeding", an equal distribution "of the filling pressure in both work areas is achieved. This works noise reducing. The suctioned hydraulic fluid is displaced into the pressure area by the vanes 8 and reaches the pressure chamber 35 via the outlet channels 31, 32 and from there via the delivery channel 36 and the throttle body 38 to the outer pump outlet 37.
- valve cone 49 lifts off, so that the pressure in the valve chamber 47 drops and the slide piston 41 is displaced to the right in the drawing. This in turn creates the direct connection between the pressure chamber 35 and the feed channels 18a, 18b (function as a pressure relief valve).
- the surrounding wall parts Due to the arrangement of the pressure chamber 35 centrally in the housing 1, the surrounding wall parts have a good sound-insulating effect, in particular because the flow control valve 40 is also aligned with the axis of the rotor 7 and the pressure plate 4.
- the housing cover 2 is made of aluminum, on the one hand to save weight and on the other hand to offer a good running surface.
- a stiffening rib 3 is used to receive a leak oil hole 3a, which leads the leak creeping along the shaft 9 back into the storage space 16. Due to the existence of the storage space 16, the size of the storage container 14 can be reduced accordingly, whereby the size and weight of the overall pump can also be saved.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8181104981T DE3174238D1 (en) | 1981-06-26 | 1981-06-26 | Vane pump, especially for power steering |
EP19810104981 EP0068035B1 (fr) | 1981-06-26 | 1981-06-26 | Pompe à palettes en particulier pour direction assistée |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19810104981 EP0068035B1 (fr) | 1981-06-26 | 1981-06-26 | Pompe à palettes en particulier pour direction assistée |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0068035A1 true EP0068035A1 (fr) | 1983-01-05 |
EP0068035B1 EP0068035B1 (fr) | 1986-04-02 |
Family
ID=8187788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19810104981 Expired EP0068035B1 (fr) | 1981-06-26 | 1981-06-26 | Pompe à palettes en particulier pour direction assistée |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0068035B1 (fr) |
DE (1) | DE3174238D1 (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3623421A1 (de) * | 1986-07-11 | 1988-01-14 | Vickers Systems Gmbh | Lenkhilfpumpe |
EP1074741A1 (fr) * | 1999-08-02 | 2001-02-07 | Ford Motor Company | Pompe cartouche à palettes avec alimentation de fluide de deux côtes et entrée d'un seul côté |
WO2008148472A1 (fr) * | 2007-06-05 | 2008-12-11 | Robert Bosch Gmbh | Pompe à palettes |
US20170057678A1 (en) * | 2014-05-08 | 2017-03-02 | Technische Universität Dresden | Method and Device for Producing Molded Parts from a Continuous Fiber-Material Sheet |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2800083A (en) * | 1951-11-07 | 1957-07-23 | Vickers Inc | Power transmission |
US2880674A (en) * | 1953-09-11 | 1959-04-07 | Vickers Inc | Power transmission |
FR1536836A (fr) * | 1967-09-15 | 1968-08-16 | Hobourn Eaton Mfg Co Ltd | Pompe rotative |
DE1553020A1 (de) * | 1964-01-02 | 1970-10-22 | Breinlich Dr Richard | Drehfluegelmaschine mit einer verbesserten Steuerung der Zufuehrung und Abfuehrung des Fluidums |
DE2043468A1 (de) * | 1969-09-05 | 1971-03-25 | Eaton YaIe & Towne, Ine , Cleve land, Ohio (V St A ) | Pumpenanordnung |
-
1981
- 1981-06-26 EP EP19810104981 patent/EP0068035B1/fr not_active Expired
- 1981-06-26 DE DE8181104981T patent/DE3174238D1/de not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2800083A (en) * | 1951-11-07 | 1957-07-23 | Vickers Inc | Power transmission |
US2880674A (en) * | 1953-09-11 | 1959-04-07 | Vickers Inc | Power transmission |
DE1553020A1 (de) * | 1964-01-02 | 1970-10-22 | Breinlich Dr Richard | Drehfluegelmaschine mit einer verbesserten Steuerung der Zufuehrung und Abfuehrung des Fluidums |
FR1536836A (fr) * | 1967-09-15 | 1968-08-16 | Hobourn Eaton Mfg Co Ltd | Pompe rotative |
DE2043468A1 (de) * | 1969-09-05 | 1971-03-25 | Eaton YaIe & Towne, Ine , Cleve land, Ohio (V St A ) | Pumpenanordnung |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3623421A1 (de) * | 1986-07-11 | 1988-01-14 | Vickers Systems Gmbh | Lenkhilfpumpe |
EP1074741A1 (fr) * | 1999-08-02 | 2001-02-07 | Ford Motor Company | Pompe cartouche à palettes avec alimentation de fluide de deux côtes et entrée d'un seul côté |
WO2008148472A1 (fr) * | 2007-06-05 | 2008-12-11 | Robert Bosch Gmbh | Pompe à palettes |
DE102007039172B4 (de) | 2007-06-05 | 2024-02-15 | Robert Bosch Gmbh | Flügelzellenpumpe |
US20170057678A1 (en) * | 2014-05-08 | 2017-03-02 | Technische Universität Dresden | Method and Device for Producing Molded Parts from a Continuous Fiber-Material Sheet |
Also Published As
Publication number | Publication date |
---|---|
DE3174238D1 (en) | 1986-05-07 |
EP0068035B1 (fr) | 1986-04-02 |
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