JPS5779281A - Pressure liquid feeding apparatus - Google Patents
Pressure liquid feeding apparatusInfo
- Publication number
- JPS5779281A JPS5779281A JP55154471A JP15447180A JPS5779281A JP S5779281 A JPS5779281 A JP S5779281A JP 55154471 A JP55154471 A JP 55154471A JP 15447180 A JP15447180 A JP 15447180A JP S5779281 A JPS5779281 A JP S5779281A
- Authority
- JP
- Japan
- Prior art keywords
- droping
- flow rate
- action
- rate control
- control valve
- 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
Links
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Fluid Gearings (AREA)
- Power Steering Mechanism (AREA)
Abstract
PURPOSE: To reduce the consumption power by selectively feeding the pressure liquid from a plurality of pumps by using a flowing passage switching valve which operates according to the magnitude of the load of a hydraulic equipment and using the flow rate control valve equipped with a droping mechanism.
CONSTITUTION: A flowing passage switching valve 12 which selectively feeds the pressure liquid from a plurality of pumps according to the magnitude of the load on the hydraulic equipment side is installed. When the discharge amount increases over a fixed value with increase of the number of revolution of the pump, a flow rate control valve 20 operates to maintain a constant feeding amount, and when the number of revolution increases further, droping action is generated with the variable orifice constituted of the orifice 22 in a main passage 10 and the small diameter part 30 of a spool 21.Thus, the back pressure applied onto the pump side is reduced by reduction of the feeing amount due to the action of the flow rate control valve 20, especially due to the droping action, and the pressure loss due to piping is reduced, and the energy saving effect can be increased further.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55154471A JPS6020591B2 (en) | 1980-10-31 | 1980-10-31 | Pressure fluid supply device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55154471A JPS6020591B2 (en) | 1980-10-31 | 1980-10-31 | Pressure fluid supply device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5779281A true JPS5779281A (en) | 1982-05-18 |
JPS6020591B2 JPS6020591B2 (en) | 1985-05-22 |
Family
ID=15584968
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55154471A Expired JPS6020591B2 (en) | 1980-10-31 | 1980-10-31 | Pressure fluid supply device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6020591B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5893565U (en) * | 1981-12-21 | 1983-06-24 | 三菱自動車工業株式会社 | Hydraulic control device for power steering device |
US4838767A (en) * | 1982-11-22 | 1989-06-13 | Jidosha Kiki Co., Ltd. | Balanced vane type oil pumps |
-
1980
- 1980-10-31 JP JP55154471A patent/JPS6020591B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5893565U (en) * | 1981-12-21 | 1983-06-24 | 三菱自動車工業株式会社 | Hydraulic control device for power steering device |
US4838767A (en) * | 1982-11-22 | 1989-06-13 | Jidosha Kiki Co., Ltd. | Balanced vane type oil pumps |
Also Published As
Publication number | Publication date |
---|---|
JPS6020591B2 (en) | 1985-05-22 |
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