EP0125328A1 - Pompe à palettes, en particulier pour servo-assistance - Google Patents

Pompe à palettes, en particulier pour servo-assistance Download PDF

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Publication number
EP0125328A1
EP0125328A1 EP83104769A EP83104769A EP0125328A1 EP 0125328 A1 EP0125328 A1 EP 0125328A1 EP 83104769 A EP83104769 A EP 83104769A EP 83104769 A EP83104769 A EP 83104769A EP 0125328 A1 EP0125328 A1 EP 0125328A1
Authority
EP
European Patent Office
Prior art keywords
channel
valve
insert
side end
vane pump
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
EP83104769A
Other languages
German (de)
English (en)
Other versions
EP0125328B1 (fr
Inventor
Heinz Teubler
Heinz Krüger
René Dr. Dipl.-Ing. Schulz
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 EP83104769A priority Critical patent/EP0125328B1/fr
Priority to DE8383104769T priority patent/DE3370058D1/de
Priority to US06/609,290 priority patent/US4575314A/en
Priority to CA000454154A priority patent/CA1217387A/fr
Priority to JP59096296A priority patent/JPH0689748B2/ja
Publication of EP0125328A1 publication Critical patent/EP0125328A1/fr
Application granted granted Critical
Publication of EP0125328B1 publication Critical patent/EP0125328B1/fr
Priority to JP5086627A priority patent/JPH0658267A/ja
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
    • F04C15/062—Arrangements for supercharging the working space
    • 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 with the features of the preamble of claim 1.
  • supply channels are provided which extend from an oil storage space to the work spaces and each have a normally vertical section and a normally horizontal, knee-shaped section, which are located in the axial plane of the rotor extend and open with their axial legs in current distribution spaces to the work spaces and with their radial legs in a valve chamber from which - when a valve responds - the hydraulic fluid flows out.
  • the feed channels are essentially symmetrical and arranged. In the exemplary embodiment shown, the knee-shaped sections of the feed channels have been produced using the casting process.
  • the invention is therefore based on the object of designing a vane pump of the type specified at the outset in such a way that there is a good deflection of the hydraulic fluid in the region of the knee-shaped section, the risk of erosion being avoided.
  • the erosion is avoided in that the stopper-shaped insert is thicker than the feed channel in the region of the knee-shaped section and to a certain extent lines the feed channel.
  • the housing is made of die-cast aluminum, brass or some other less eroding material is used for the plug-shaped use. The transition between the supply channel section formed by the wall of the die-cast aluminum and the knee-shaped section formed by the plug-shaped insert has been moved to a position which is not hit by the jet of hydraulic fluid flowing out of the valve.
  • the plug-shaped insert expediently extends up to the inflow channel coming from the tank, in which suction prevails when the valve responds.
  • the first or front step of the stepped bore intersects the suction inflow channel.
  • the front end of the plug-shaped insert is accessible for a special adapted processing so that the flow conditions at the transition of the discharge channel of the valve to the suction-inflow channel and further into the curved feed channel can be adapted to a wide range of operating conditions.
  • the vane pump has a main housing part 1 and a housing cover 2, which are made of die-cast aluminum and enclose an interior 1a in a pressure-tight manner.
  • a rotor 7 is arranged within the cam ring 5 and between the housing cover 2 and the pressure plate 4 and has a series of radial guide slots. Wings 8 are radially displaceably mounted within these guide slots.
  • the rotor 7 can be driven via a shaft / 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 there are two crescent-shaped working areas which are divided by the vanes 8 into a number of cell spaces.
  • On the suction side of the Sy The cell spaces are constantly increasing and the pressure side is decreasing.
  • the supply of hydraulic fluid takes place from a tank (not shown) into a distribution space 16, from which two approximately vertical bores emanate as feed channels 17a, 17b and tangentially meet knee-shaped feed channel sections 18a, 18b, the feed channel sections 18a, 18b in the normally horizontal axis plane of the pump and are arranged symmetrically to each other.
  • the knee-shaped feed channel sections 18a, 18b each have a radial leg which opens into an unloading channel 19a or 19b, while the axial legs meet through openings 20 of the pressure plate 4.
  • the through openings 20 serve to supply the hydraulic fluid into the respective working spaces of the pump.
  • the hydraulic fluid is discharged via channels 33 through the pressure plate 4 on its rear side into a pressure chamber 35 and from there via a delivery channel 36 to an outer pump outlet 37.
  • a throttle body 38 with a measuring orifice 38a and an auxiliary throttle 38b.
  • the auxiliary throttle 38b is connected to the spring chamber 47 of a flow control valve 40 via a channel 39.
  • This 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 41 has two collar-shaped sealing areas 43 and 44, between which an annular groove 45 extends.
  • a channel 46 which extends partially radially and partially axially, leads through the slide piston 41 into the valve chamber 47, and the channel 46 is controlled by a cone valve, which when a certain permissible pressure in the valve space 47 is exceeded responds and vented this space so that the spool 41 acts as a controlled pressure relief valve, as is known.
  • the valve 40 assumes the position shown in FIG. 2.
  • a gap is released between the piston collar 43 and the edge of the channel 19a or 19b, through which a powerful hydraulic jet 50 (FIGS. 3 to 5) shoots, depending on the pressure of the hydraulic fluid in the pressure chamber 35.
  • the jet 50 normally passes obliquely at the mouth of the inflow channel 17a or 17b, so that a suction is created at this junction, through which hydraulic fluid is drawn in from the tank.
  • the jet 50 also has the unpleasant property of scouring out the wall material at the point of impact.
  • the usual aluminum die-cast material for bearing housings is particularly sensitive to cavitation erosion. In the invention, therefore, the impact point is lined with erosion-resistant material, for example made of brass (in particular material no. 20550), bronze or steel.
  • a plug-shaped insert 51 (FIG. 3), 52 (FIG. 4) or 53 (FIG. 5) is provided, which is to be fastened in an associated stepped bore 61 or 62 or 63.
  • Each step bore 61, 62, 63 has a front step 64, a middle step 65 or 66 and a rear step 67, from which an outer bore section 68 extends, which, as seen from the valve 40, radially outside the knee-shaped feed channels 18a and 18b is arranged.
  • the inserts 51, 52, 53 each have a press collar 54 with a conical taper 55 in order to insert the bore section 68 and to hold it by a press fit.
  • In each middle part of the insert there is a toroidal deflection section 56 along a quarter circle provided on which the flow deflection between the radial and axial leg of the knee-shaped feed channel 18a or 18b takes place.
  • the front steps 64, 65 are arranged near the center of the inflow channel 17a or 17b, i.e. the plug-shaped insert 51 has a front end 57 which is drawn very far inward and which is cut out in the region of the inflow channel 17a, 17b in order not to hinder the inflow of hydraulic fluid.
  • the deflection channel is designed as a laterally open groove which extends at the valve-side end 57 in the axial direction of the insert 51 and is designed as a torus at the pump-side end 58. Such a groove can easily be made with a ball mill.
  • the diameter of the unloading channel 19a, 19b is smaller than the groove depth of the insert 51, i.e.
  • FIG. 4 also shows an insert 52 which extends far inwards, the front end 57 of which is designed similarly to that in FIG . This is possible because the pump-side end 58 of the deflection channel is quite easily accessible and a ball mill can be guided along a curve when immersed in the insert 52 to be produced.
  • the ridge 57g can be be rounded off to reduce the risk of eddy formation.
  • the rounded degree 57g lies approximately in the radial central plane of the inflow channel 17a or 17b.
  • the insert 53 according to FIG. 5 is somewhat shorter and has a drilled deflection channel, which is produced similarly to the case in FIG. 4.
  • the transition point between insert 53 and the die-cast material of the pump housing at stage 66 is particularly at risk of erosion; for this reason it is ensured that the hydraulic jet 50 does not occasionally hit this point.
  • the collar 43 has an undercut 43a which is designed in the shape of a flute in order to effect beam guidance in cooperation with the edge 61k.
  • the beam 50 is oriented much more parallel to the local axial direction of the channel 19a or 19b than is the case in the embodiment according to FIG. 3 or 4. Therefore, the beam 50 hits the wall of the insert 53 much later, practically in the region of curvature of the deflection channel.
  • the insert 51 is preferably produced by extrusion, while the inserts 52 and 53 are preferably drilled and milled in combination, insofar as the deflection channel is produced.
  • the housing 1, which is preferably made of aluminum, can also be produced by die casting in addition to die casting.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP83104769A 1983-05-14 1983-05-14 Pompe à palettes, en particulier pour servo-assistance Expired EP0125328B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP83104769A EP0125328B1 (fr) 1983-05-14 1983-05-14 Pompe à palettes, en particulier pour servo-assistance
DE8383104769T DE3370058D1 (en) 1983-05-14 1983-05-14 Vane pump, especially for power steering
US06/609,290 US4575314A (en) 1983-05-14 1984-05-11 Deflecting insert for a rotary vane pump
CA000454154A CA1217387A (fr) 1983-05-14 1984-05-11 Pompe centrifuge
JP59096296A JPH0689748B2 (ja) 1983-05-14 1984-05-14 回転羽根ポンプ
JP5086627A JPH0658267A (ja) 1983-05-14 1993-04-14 回転羽根ポンプ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83104769A EP0125328B1 (fr) 1983-05-14 1983-05-14 Pompe à palettes, en particulier pour servo-assistance

Publications (2)

Publication Number Publication Date
EP0125328A1 true EP0125328A1 (fr) 1984-11-21
EP0125328B1 EP0125328B1 (fr) 1987-03-04

Family

ID=8190465

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104769A Expired EP0125328B1 (fr) 1983-05-14 1983-05-14 Pompe à palettes, en particulier pour servo-assistance

Country Status (5)

Country Link
US (1) US4575314A (fr)
EP (1) EP0125328B1 (fr)
JP (2) JPH0689748B2 (fr)
CA (1) CA1217387A (fr)
DE (1) DE3370058D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3506458A1 (de) * 1984-04-06 1985-10-17 Zahnradfabrik Friedrichshafen Hochdruckpumpe mit stromregelventil
WO1993010354A1 (fr) * 1991-11-23 1993-05-27 Luk Fahrzeug-Hydraulik Gmbh & Co. Kg Pompe
WO1998059172A1 (fr) * 1997-06-24 1998-12-30 Luk Fahrzeug-Hydraulik Gmbh & Co. Kg Pompe pour refouler une substance
DE19513079C2 (de) * 1995-04-07 2003-03-27 Zahnradfabrik Friedrichshafen Flügelzellenpumpe mit Stromregelventil

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0634634Y2 (ja) * 1987-11-09 1994-09-07 カヤバ工業株式会社 ベーンポンプ
JPH02139386U (fr) * 1989-04-24 1990-11-21
DE4237483C2 (de) * 1992-11-06 2000-12-07 Zahnradfabrik Friedrichshafen Hochdruckpumpe, insbesondere für Hilfskraftlenkungen
US5567125A (en) * 1995-01-06 1996-10-22 Trw Inc. Pump assembly with tubular bypass liner with at least one projection
DE19810318B4 (de) * 1997-03-12 2014-01-16 Ixetic Bad Homburg Gmbh Hydraulikmaschine
WO2004007966A1 (fr) * 2002-06-13 2004-01-22 Toyoda Koki Kabushiki Kaisha Pompe a huile
JP4932670B2 (ja) * 2007-10-25 2012-05-16 カヤバ工業株式会社 可変減衰弁

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2724335A (en) * 1951-12-14 1955-11-22 Eaton Mfg Co Pumping unit with flow director
US3366065A (en) * 1967-01-03 1968-01-30 Chrysler Corp Supercharging of balanced hydraulic pump
FR2075779A5 (fr) * 1970-01-24 1971-10-08 Zahnradfabrik Friedrichshafen
DE2219588A1 (de) * 1972-04-21 1973-10-25 Teves Gmbh Alfred Verfahren und vorrichtung zur herstellung von druckmittelkanaelen in gussgehaeusen von hydromaschinen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2880674A (en) * 1953-09-11 1959-04-07 Vickers Inc Power transmission
US4168033A (en) * 1977-07-06 1979-09-18 Rain Bird Sprinkler Mfg. Corp. Two-piece wear-resistant spray nozzle construction
DE3018650A1 (de) * 1980-05-16 1981-11-26 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Hochdruckpumpe mit einem stomregelventil
US4470768A (en) * 1983-01-03 1984-09-11 Sperry Vickers Zweigniederlassung Der Sperry Gmbh Rotary vane pump, in particular for assisted steering

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2724335A (en) * 1951-12-14 1955-11-22 Eaton Mfg Co Pumping unit with flow director
US3366065A (en) * 1967-01-03 1968-01-30 Chrysler Corp Supercharging of balanced hydraulic pump
FR2075779A5 (fr) * 1970-01-24 1971-10-08 Zahnradfabrik Friedrichshafen
DE2219588A1 (de) * 1972-04-21 1973-10-25 Teves Gmbh Alfred Verfahren und vorrichtung zur herstellung von druckmittelkanaelen in gussgehaeusen von hydromaschinen

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3506458A1 (de) * 1984-04-06 1985-10-17 Zahnradfabrik Friedrichshafen Hochdruckpumpe mit stromregelventil
WO1993010354A1 (fr) * 1991-11-23 1993-05-27 Luk Fahrzeug-Hydraulik Gmbh & Co. Kg Pompe
US5496152A (en) * 1991-11-23 1996-03-05 Luk Farhzeug-Hydraulik Gmbh & Co. Kg Pump with internal valve between suction and pressure regions
DE19513079C2 (de) * 1995-04-07 2003-03-27 Zahnradfabrik Friedrichshafen Flügelzellenpumpe mit Stromregelventil
DE19513079B9 (de) * 1995-04-07 2004-09-09 Zf Friedrichshafen Ag Flügelzellenpumpe mit Stromregelventil
WO1998059172A1 (fr) * 1997-06-24 1998-12-30 Luk Fahrzeug-Hydraulik Gmbh & Co. Kg Pompe pour refouler une substance
GB2332482A (en) * 1997-06-24 1999-06-23 Luk Fahrzeug Hydraulik Pump for conveying a medium
US6164922A (en) * 1997-06-24 2000-12-26 Luk Fahrzeug-Hydraulik Gmbh & Co. Kg Flow control valve for a pump for conveying a medium
GB2332482B (en) * 1997-06-24 2001-10-03 Luk Fahrzeug Hydraulik Pump for conveying a medium

Also Published As

Publication number Publication date
JPH0658267A (ja) 1994-03-01
EP0125328B1 (fr) 1987-03-04
CA1217387A (fr) 1987-02-03
DE3370058D1 (en) 1987-04-09
JPS59218379A (ja) 1984-12-08
JPH0689748B2 (ja) 1994-11-14
US4575314A (en) 1986-03-11

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