JPS5773881A - Variable capacity vane pump - Google Patents
Variable capacity vane pumpInfo
- 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
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
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)
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 |
-
1980
- 1980-10-23 JP JP14851980A patent/JPS5773881A/en active Pending
Cited By (4)
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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