JPS5773881A - Variable capacity vane pump - Google Patents

Variable capacity vane pump

Info

Publication number
JPS5773881A
JPS5773881A JP14851980A JP14851980A JPS5773881A JP S5773881 A JPS5773881 A JP S5773881A JP 14851980 A JP14851980 A JP 14851980A JP 14851980 A JP14851980 A JP 14851980A JP S5773881 A JPS5773881 A JP S5773881A
Authority
JP
Japan
Prior art keywords
center
differential pressure
pressing member
increase
cam ring
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.)
Pending
Application number
JP14851980A
Other languages
Japanese (ja)
Inventor
Yoshiaki Kato
Hirotsugu Yamaguchi
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
Priority to JP14851980A priority Critical patent/JPS5773881A/en
Publication of JPS5773881A publication Critical patent/JPS5773881A/en
Pending legal-status Critical Current

Links

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

PURPOSE: To maintain the discharge rate of a vane pump constant by moving a pressing member of a cylinder device back and forth according to the differential pressure of an orifice privided in a discharge passage thereby reducing the eccentricity between the center of a cylindrical cam and the center of a rotor when the differential pressure becomes larger.
CONSTITUTION: The pressure in a discharge passage 41 rises with the increase of the pump rotation to increase the differential pressure between the upstream side and downstream side of an orifice 44 moving pistons 29 and 30 in pressure chambers 33 and 34 respectively to the left and in turn moving pressing members 21 and 22 fixed to rods 25 and 26, the upper pressing member 21 pressing down a slope 12 on the top surface of a cam ring 10 by its inclined face 21a and the lower pressing member 22 retracting to withdraw its inclined face 22a from a slope 13 on the bottom surface of the cam ring 10. Thus the cam ring 10 moves downward to reduce the eccentricity between the center O1 of the rotor and the center O2 of the cylindrical cam reducing the pump discharge rate thereby maintaining the discharge rate approximately constant despite of the pump rotation increase.
COPYRIGHT: (C)1982,JPO&Japio
JP14851980A 1980-10-23 1980-10-23 Variable capacity vane pump Pending JPS5773881A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14851980A JPS5773881A (en) 1980-10-23 1980-10-23 Variable capacity vane pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14851980A JPS5773881A (en) 1980-10-23 1980-10-23 Variable capacity vane pump

Publications (1)

Publication Number Publication Date
JPS5773881A true JPS5773881A (en) 1982-05-08

Family

ID=15454583

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14851980A Pending JPS5773881A (en) 1980-10-23 1980-10-23 Variable capacity vane pump

Country Status (1)

Country Link
JP (1) JPS5773881A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0382881U (en) * 1989-12-11 1991-08-23
JP2004251267A (en) * 2002-04-03 2004-09-09 Borgwarner Inc Variable displacement pump and its control system
WO2020189008A1 (en) * 2019-03-20 2020-09-24 日立オートモティブシステムズ株式会社 Oil pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0382881U (en) * 1989-12-11 1991-08-23
JPH0631190Y2 (en) * 1989-12-11 1994-08-22 株式会社豊田自動織機製作所 Axial piston pump
JP2004251267A (en) * 2002-04-03 2004-09-09 Borgwarner Inc Variable displacement pump and its control system
WO2020189008A1 (en) * 2019-03-20 2020-09-24 日立オートモティブシステムズ株式会社 Oil pump

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