EP0068035A1 - Pompe à palettes en particulier pour direction assistée - Google Patents

Pompe à palettes en particulier pour direction assistée Download PDF

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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
Application number
EP19810104981
Other languages
German (de)
English (en)
Other versions
EP0068035B1 (fr
Inventor
Erwin Konz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cessione luk Fahrzeug - Hidraulik & Co KG GmbH
Original Assignee
Vickers Systems GmbH
Sperry Vickers Zweigniederlassung Der Sperry GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Vickers Systems GmbH, Sperry Vickers Zweigniederlassung Der Sperry GmbH filed Critical Vickers Systems GmbH
Priority to EP19810104981 priority Critical patent/EP0068035B1/fr
Priority to DE8181104981T priority patent/DE3174238D1/de
Publication of EP0068035A1 publication Critical patent/EP0068035A1/fr
Application granted granted Critical
Publication of EP0068035B1 publication Critical patent/EP0068035B1/fr
Expired legal-status Critical Current

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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)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
EP19810104981 1981-06-26 1981-06-26 Pompe à palettes en particulier pour direction assistée Expired EP0068035B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19810104981 EP0068035B1 (fr) 1981-06-26 1981-06-26 Pompe à palettes en particulier pour direction assistée
DE8181104981T DE3174238D1 (en) 1981-06-26 1981-06-26 Vane pump, especially for power steering

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
EP0068035B1 (fr) 1986-04-02
DE3174238D1 (en) 1986-05-07

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