EP0095194A1 - Rotary vane pump - Google Patents

Rotary vane pump Download PDF

Info

Publication number
EP0095194A1
EP0095194A1 EP19830105191 EP83105191A EP0095194A1 EP 0095194 A1 EP0095194 A1 EP 0095194A1 EP 19830105191 EP19830105191 EP 19830105191 EP 83105191 A EP83105191 A EP 83105191A EP 0095194 A1 EP0095194 A1 EP 0095194A1
Authority
EP
European Patent Office
Prior art keywords
cam ring
pump
piston
rotor
vanes
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Withdrawn
Application number
EP19830105191
Other languages
German (de)
English (en)
French (fr)
Inventor
Kazuyoshi Fujioka
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Publication of EP0095194A1 publication Critical patent/EP0095194A1/en
Withdrawn legal-status Critical Current

Links

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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
    • F04C14/223—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam
    • F04C14/226—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members using a movable cam by pivoting the cam around an eccentric axis

Definitions

  • This invention relates to a variable-volume type rotary vane pump which can be used as an oil pump for an automatic transmission or a compressor for an air conditioner.
  • such a type rotary vane pump has a cam ring, a rotor eccentrically arranged in the cam ring, and a plurality of vanes which are attached to the rotor so as to move in the radius directions.
  • the vanes always contact the inner periphery of the cam ring.
  • plural pump chambers formed between the adjacent vanes change in volume so as to function as a pump.
  • the volume change rate varies so that the discharging amount or quantity of the fluid from the pump chambers changes.
  • an actuator is separate from the vane pump for the purpose of adjusting the eccentricity in response to the volume control pressure.
  • an actuator is separate from the vane pump for the purpose of adjusting the eccentricity in response to the volume control pressure.
  • Japanese Patent Publication No. 53-6724 In other words, such an actuator must be added.. For such a reason, the total size of the pump and the actuator becomes large. Therefore, a large space is required so as to arrange the pump and the actuator. Also the number of parts and the . production cost increase.
  • a cam ring itself constitutes a rotary piston. By rotating the cam ring in response to the volume control pressure, the eccentricity between the cam ring and the rotor is adjusted.
  • the object of this invention is to provide a variable-volume type rotary vane pump which can be arranged in a compact size.
  • a cam ring itself does not constitute a piston.
  • a piston is arranged in a pump housing so as to move in response to the volume control pressure. This piston is used to displace the cam ring with respect to the pump housing thereby to adjust the eccentricity between a rotor and the cam ring.
  • the volume control pressure is not directly applied to the cam ring, it is not necessary to increase the thickness of the cam ring. Only a portion of the pump housing in which the piston is arranged must be increased in space. Therefore, a large space is not required in order to set the pump.
  • a pump housing 1 has a through hole la formed between opposite ends lb thereof.
  • Two pump covers 2 of a disc shape cover both ends lb of the pump housing 1, respectively, thereby to enclose the through hole la.
  • These pump covers 2 are fixed to the ends lb of the pump housing 1 by means of bolt and nut means 3 so as to form a space 4 therein.
  • one cover 2 is partly broken away for the purpose of showing many members arranged in the space 4.
  • a cam ring 5 is arranged in the space 4.
  • the cam ring 5 is rotatable around a pivot pin 6 at an outwardly projecting portion 5d.
  • the pivot pin 6 is supported between the two pump covers 2.
  • the width of the cam ring 5 is the same as that of the pump housing 1 such that both ends of the cam ring 5 can contact fluid-tightly the inner surface of the pump covers 2.
  • a rotor 7 which is fixed coaxially to a pump driving shaft 8.
  • the shaft 8 is rotatably supported by the pump covers 2.
  • One end of the shaft 8 extends outwardly from the pump cover 2 so as to be connected to a driving source (not shown).
  • the rotor 7 rotates together with the shaft 8 in the direction of the arrow X in Fig. 1.
  • the width of the rotor 7 is the same as that of the pump housing 1 so that both end portions of the rotor 7 can contact fluid-tightly the pump covers 2.
  • a plurality of vanes 9 are slidably inserted into slit formed at the same intervals in a peripheral portion of the rotor 7. Each slit is connected to a through-hole 7b formed between opposite circular grooves 7a.
  • the circular grooves 7a of a channel shape are formed in the opposite end surfaces of the rotor 7.
  • a spring ring 10 is arranged in each of the circular grooves 7a. All vanes 9 are outwardly biased by the ring 10 thereby to press the outer end portions of the vanes 9 against the inner surface 5c of the cam ring 5.
  • each vane 9 is the same as that of the pump housing 1 as shown in Fig. " 2.
  • the ends of the vanes 9 contact fluid-tightly the inner surfaces of the pump covers 2.
  • a plurality of pump chambers 11 are defined by the adjacent vanes 9, the cam ring 5, the rotor 7 and the two pump covers 2. In the shown embodiment of this invention, nine vanes are used to form nine pump chambers 11.
  • a piston 12 is arranged in the space 4 of the pump housing 1.
  • the piston 12 is placed along a side portion of the cam ring 5.
  • a pressure chamber 14 is defined by the pump housing 1, the piston 12, and the two pump covers 2.
  • the piston 12 is rotatable around a pivot pin 15 attached between the two pump covers 2 at one end of the piston 12.
  • the other end of the piston 12 abuts against a projection 5a of the cam ring 5.
  • a piston ring 13 is attached to the piston 12 near the projection 5a of the cam ring 5 so as to ensure the pressure chamber 14b remaining in a good condition.
  • the cam ring 5 has also an arm 5b extending outwardly near the projection 5a.
  • a return spring 16 is arranged between the arm 5b and a recess wall lc of the pump housing 1 thereby to bias the cam ring 5 counterclockwise.
  • the center 01 of the cam ring 5 is apart from the center 02 of the rotor 7. That is, the cam ring 5 and the rotor 7 are not coaxial.
  • One of the pump cover 2 has a pump entrance port 2a, a pump exit port 2b and a volume control pressure port 2c.
  • the pump entrance port 2a and the pump exit port 2b are formed of an arm shape and positioned substantially along the outer periphery of the rotor 7 at the opposition to each other.
  • the pump entrance port 2a is relatively near the return spring 16.
  • the pump exit port 2b is near the pivot pin 6.
  • the volume control pressure port 2c faces the pressure chamber 14.
  • Fig. 1 shows a normal condition of the rotary vane pump.
  • the volume of each pump chamber 11 varies due to the eccentricity between the cam ring 5 and the rotor 7.
  • the vanes 9 move along the pump entrance port 2a
  • the volume of the pump chambers 11 increase whereby the fluid flows into the pump chambers 11 from the pump entrance port 2a.
  • the vanes 9 move along the pump exit port 2b
  • the volume of the pump chambers 11 decrease so that the fluid is discharged through the pump exit port 2b.
  • Such a cycle is repeated whereby the fluid is continuously intaken and then discharged so as to obtain a desired pump operation.
  • the eccentricity between the cam ring 5 and the rotor 7 is the largest.
  • the center 01 of the cam ring 5 is apart from the center 02 of the rotor 7 to the most extreme degree.
  • the volume change rate of the pump chambers 11 is the high so that the pump feeding capacity is the largest.
  • the projection 5a of the cam ring 5 is displaced clockwise thereby to rotate the cam ring 5 in the same direction around the pivot pin 6.
  • the center Ol of the cam ring 5 comes toward the center 02 of the rotor 7.
  • the eccentricity between the rotor 7 and the cam ring 5 decreases.
  • the volume change rate of the pump chambers 11 also decreases.
  • the pump feeding capacity is controlled at a desired small value.
  • the volume control pressure in the pressure chamber 14 becomes small in response thereto.
  • the piston 12 and the cam ring 5 rotate counterclockwise or in the direction of the arrow X by means of the biasing force of the return spring 16.
  • the center Ol of the cam ring 5 becomes apart from the center 02 of the rotor 7 so that the eccentricity therebetween increases.
  • the pump feeding capacity is adjusted to a desired value.
  • a variable-volume type rotary vane pump has the piston 12 operating in response to the volume control pressure.
  • the piston 12 is used to move the cam ring 5 relative to t:ie rotor 7 so as to change the eccentricity between ihe cam ring 5 and the rotor 7 for the purpose of adjusting the pump feeding capacity. Therefore, the volume control pressure is not directly applied to the cam ring 5. For such a reason, it is not necessary to increase the thickness of the cam ring 5. Accordingly, a compact pump can be designed except the place where the piston 12 is arranged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP19830105191 1982-05-26 1983-05-25 Rotary vane pump Withdrawn EP0095194A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP88022/82 1982-05-26
JP8802282A JPS58204986A (ja) 1982-05-26 1982-05-26 可変容量型ロ−タリベ−ンポンプ

Publications (1)

Publication Number Publication Date
EP0095194A1 true EP0095194A1 (en) 1983-11-30

Family

ID=13931202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830105191 Withdrawn EP0095194A1 (en) 1982-05-26 1983-05-25 Rotary vane pump

Country Status (2)

Country Link
EP (1) EP0095194A1 (ja)
JP (1) JPS58204986A (ja)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2167811A (en) * 1984-11-30 1986-06-04 Ford Motor Co Oil pump
US5178525A (en) * 1990-01-09 1993-01-12 Nissan Motor Co., Ltd. Variable volume type vane pump with lubricating oil reservoir
DE4307003A1 (en) * 1992-03-06 1993-09-16 Jatco Corp Variable volume rotary slide pump for vehicle engine - uses pair of inclusion segments inserted between rotor and cam ring.
US7108493B2 (en) 2002-03-27 2006-09-19 Argo-Tech Corporation Variable displacement pump having rotating cam ring
WO2007039012A1 (de) * 2005-10-06 2007-04-12 Joma-Hydromechanic Gmbh Flügelzellenpumpe
US7607907B2 (en) 2003-09-22 2009-10-27 WOP Industrias E Comercio De Bombas Ltda. Roller vane pump
CN101147000B (zh) * 2005-10-06 2011-02-16 约马-综合塑料技术有限公司 叶片泵

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1167695B (it) * 1983-12-23 1987-05-13 Atos Oleodinamica Spa Pompa volumetrica a palette a cilindrata variabile per azionamento fluidoidraulico
JP3815805B2 (ja) * 1994-11-15 2006-08-30 富士重工業株式会社 自動変速機のポンプ吐出量制御装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2142275A (en) * 1937-08-24 1939-01-03 Eclipse Aviat Corp Fluid pump
US3153384A (en) * 1961-06-12 1964-10-20 Pacific Ind Mfg Co Vane type pump
US3415058A (en) * 1967-04-26 1968-12-10 Borg Warner Hydraulic pump control system
US3687579A (en) * 1969-07-21 1972-08-29 Hobourn Eaton Mfg Co Ltd Rotary pumps
GB2026094A (en) * 1978-07-24 1980-01-30 Gen Motors Corp Rotary positive-displacement fluid-machines

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5194104A (ja) * 1975-02-18 1976-08-18
JPS5762986A (en) * 1980-10-02 1982-04-16 Nissan Motor Co Ltd Variable displacement type vane pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2142275A (en) * 1937-08-24 1939-01-03 Eclipse Aviat Corp Fluid pump
US3153384A (en) * 1961-06-12 1964-10-20 Pacific Ind Mfg Co Vane type pump
US3415058A (en) * 1967-04-26 1968-12-10 Borg Warner Hydraulic pump control system
US3687579A (en) * 1969-07-21 1972-08-29 Hobourn Eaton Mfg Co Ltd Rotary pumps
GB2026094A (en) * 1978-07-24 1980-01-30 Gen Motors Corp Rotary positive-displacement fluid-machines

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2167811A (en) * 1984-11-30 1986-06-04 Ford Motor Co Oil pump
US5178525A (en) * 1990-01-09 1993-01-12 Nissan Motor Co., Ltd. Variable volume type vane pump with lubricating oil reservoir
DE4307003A1 (en) * 1992-03-06 1993-09-16 Jatco Corp Variable volume rotary slide pump for vehicle engine - uses pair of inclusion segments inserted between rotor and cam ring.
US5366354A (en) * 1992-03-06 1994-11-22 Jatco Corporation Variable fluid volume vane pump arrangement
US7491043B2 (en) 2001-04-05 2009-02-17 Argo-Tech Corporation Variable displacement pump having a rotating cam ring
US8740593B2 (en) 2001-04-05 2014-06-03 Eaton Industrial Corporation Variable displacement pump having a rotating cam ring
US9435338B2 (en) 2001-04-05 2016-09-06 Eaton Industrial Corporation Variable displacement pump having rotating cam ring
US7108493B2 (en) 2002-03-27 2006-09-19 Argo-Tech Corporation Variable displacement pump having rotating cam ring
US7607907B2 (en) 2003-09-22 2009-10-27 WOP Industrias E Comercio De Bombas Ltda. Roller vane pump
WO2007039012A1 (de) * 2005-10-06 2007-04-12 Joma-Hydromechanic Gmbh Flügelzellenpumpe
CN101147000B (zh) * 2005-10-06 2011-02-16 约马-综合塑料技术有限公司 叶片泵
US8210836B2 (en) 2005-10-06 2012-07-03 Joma-Hydromechanic Gmbh Vane cell pump with adjustable output

Also Published As

Publication number Publication date
JPS58204986A (ja) 1983-11-29
JPS6321840B2 (ja) 1988-05-09

Similar Documents

Publication Publication Date Title
EP0135091B1 (en) Variable capacity type vane pump
US4778352A (en) Variable capacity vane compressor
US4971535A (en) Tandem rotary pump with pressure chamber between two intermediate side plates
EP0256624B1 (en) Variable capacity vane compressor
EP0009350B1 (en) Scroll-type fluid compressor units
US4976595A (en) Trochoid pump with radial clearances between the inner and outer rotors and between the outer rotor and the housing
KR100435925B1 (ko) 가변용량형구조를갖는스크롤식압축기
EP0049838A1 (en) Variable-displacement sliding-vane pump
US4505655A (en) Vane pump with positioning pins for cam ring and side plates
US5452995A (en) Scroll type refrigerant compressor with means for preventing uncontrolled movement of a drive bushing
US4551080A (en) Variable displacement sliding vane pump/hydraulic motor
EP0095194A1 (en) Rotary vane pump
CA1087455A (en) Reversible gerotor pump
US4413960A (en) Positionable control device for a variable delivery pump
EP0225126A1 (en) Variable capacity vane compressor
JP3441100B2 (ja) 可変容量形ポンプ
JPS582490A (ja) スクロ−ル型圧縮機
US5520527A (en) Apparatus for adjusting orbital radius in a scroll compressor
CA2043602A1 (en) Scroll type fluid machinery
EP0457603B1 (en) A scroll type fluid displacement apparatus
US3656870A (en) Pump
EP0384335A1 (en) Rotary hydraulic machine
US4514157A (en) Rotary vane compressor
US4813854A (en) Variable capacity vane compressor
US4082480A (en) Fluid pressure device and improved Geroler® for use therein

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: 19830525

AK Designated contracting states

Designated state(s): DE FR GB

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

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: NISSAN MOTOR CO., LTD.

18D Application deemed to be withdrawn

Effective date: 19850308

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FUJIOKA, KAZUYOSHI