JPS57177406A - Combind flow type flow control circuit capable of mode exchange - Google Patents
Combind flow type flow control circuit capable of mode exchangeInfo
- Publication number
- JPS57177406A JPS57177406A JP6302381A JP6302381A JPS57177406A JP S57177406 A JPS57177406 A JP S57177406A JP 6302381 A JP6302381 A JP 6302381A JP 6302381 A JP6302381 A JP 6302381A JP S57177406 A JPS57177406 A JP S57177406A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- flow control
- mode
- upstream
- control circuit
- 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
- Fluid-Pressure Circuits (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
PURPOSE: In a flow control circuit for a hydraulic circuit having a plurality of pumps, to save the power by freely exchanging the flow control pattern into the combined flow mode and the accumulator mode through the exchange of various valves.
CONSTITUTION: A pressure reducing type pressure compensation valve 3 and a throttle valve 4 are provided from the upstream of the main line 2 for connecting the actuators 5W7 to the delivery side of a variable pump 1. A load sensing valve 21 and a pilot valve 22 for controlling the pressure having similar structure are provided between a pressure compensation valve 3 and the pump 1 while an accumulator 4 is connected through a pilot check valve 26 to the main line 2 at the upstream of the valve 3. Furthermore a fixed pump 91 is provided where the delivery line 92 is connected to the upstream of the valve 3 of the main line 2 while simultaneously connected to a bypass type pressure compensation valve 94. The spring chamber of the valve 94 can be connected through a mode exchange valve 97 to the downstream of the throttle valve 4.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6302381A JPS57177406A (en) | 1981-04-25 | 1981-04-25 | Combind flow type flow control circuit capable of mode exchange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6302381A JPS57177406A (en) | 1981-04-25 | 1981-04-25 | Combind flow type flow control circuit capable of mode exchange |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57177406A true JPS57177406A (en) | 1982-11-01 |
| JPH029201B2 JPH029201B2 (en) | 1990-03-01 |
Family
ID=13217304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6302381A Granted JPS57177406A (en) | 1981-04-25 | 1981-04-25 | Combind flow type flow control circuit capable of mode exchange |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57177406A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6117704A (en) * | 1984-07-05 | 1986-01-25 | Toshiba Mach Co Ltd | Control valve for constant difference pressure flow |
| WO1991005958A1 (en) * | 1989-10-11 | 1991-05-02 | Hitachi Construction Machinery Co., Ltd. | Hydraulic driving apparatus of civil engineering/construction equipment |
| US5560205A (en) * | 1994-12-21 | 1996-10-01 | Caterpillar Inc. | Attenuation of fluid borne noise |
-
1981
- 1981-04-25 JP JP6302381A patent/JPS57177406A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6117704A (en) * | 1984-07-05 | 1986-01-25 | Toshiba Mach Co Ltd | Control valve for constant difference pressure flow |
| JPH0456161B2 (en) * | 1984-07-05 | 1992-09-07 | Toshiba Machine Co Ltd | |
| WO1991005958A1 (en) * | 1989-10-11 | 1991-05-02 | Hitachi Construction Machinery Co., Ltd. | Hydraulic driving apparatus of civil engineering/construction equipment |
| US5152140A (en) * | 1989-10-11 | 1992-10-06 | Hitachi Construction Machinery Co., Ltd. | Pressure compensating valve spool positioned by difference in pressure receiving areas for load and inlet pressures |
| US5560205A (en) * | 1994-12-21 | 1996-10-01 | Caterpillar Inc. | Attenuation of fluid borne noise |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH029201B2 (en) | 1990-03-01 |
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