JPS5481474A - Fluid control system - Google Patents
Fluid control systemInfo
- Publication number
- JPS5481474A JPS5481474A JP14789477A JP14789477A JPS5481474A JP S5481474 A JPS5481474 A JP S5481474A JP 14789477 A JP14789477 A JP 14789477A JP 14789477 A JP14789477 A JP 14789477A JP S5481474 A JPS5481474 A JP S5481474A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- valve
- gain
- pump
- pump discharge
- 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)
Abstract
PURPOSE: To prevent a valve on one side from interfering the valve function on the other side by providing one pressure control valve with the function of pressure eompensating valve and safety valve.
CONSTITUTION: When a spool 30 of a flow direction control valve 22 stands at the neutral position, as a chamber 39 is conducted to a reservoir 29, discharge gain from a pump 21 becomes almost zero. When a motor 23 is set into motion with moving said spool 30, load pressure of the motor 23 is led into a chamber 39, a first pressure control part 51 is regulated its opening degrees by confronting the difference between the discharge pressure and load pressure with the effort of constant pressure difference controlling spring 46, and pressure compensating flow gain control is done by controlling the pump discharge gain. When the pump discharge pressure overpasses a settled value, a stopped element 56 of an opposed pin 53 is brought into contact with a stopper 57, a maximum pressure controlling spring 45 is contracted, and a main valve 40 moves to the right. Thus, the pump discharge pressure prevent to rise more than a settled pressure, to perform the maximum pressure control.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14789477A JPS6027841B2 (en) | 1977-12-08 | 1977-12-08 | fluid control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14789477A JPS6027841B2 (en) | 1977-12-08 | 1977-12-08 | fluid control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5481474A true JPS5481474A (en) | 1979-06-28 |
| JPS6027841B2 JPS6027841B2 (en) | 1985-07-01 |
Family
ID=15440561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14789477A Expired JPS6027841B2 (en) | 1977-12-08 | 1977-12-08 | fluid control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6027841B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57195633A (en) * | 1981-05-14 | 1982-12-01 | Hehl Karl | Controller for hydraulic circuit of plastic injection molding machine |
| JPS5872702A (en) * | 1981-10-10 | 1983-04-30 | ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Pilot operating device adjusting pressure medium flow in relation to load in proportional to electric input signal |
| JPS58206892A (en) * | 1982-05-26 | 1983-12-02 | Daikin Ind Ltd | Variable displacement type hydraulic apparatus |
-
1977
- 1977-12-08 JP JP14789477A patent/JPS6027841B2/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57195633A (en) * | 1981-05-14 | 1982-12-01 | Hehl Karl | Controller for hydraulic circuit of plastic injection molding machine |
| JPS5872702A (en) * | 1981-10-10 | 1983-04-30 | ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Pilot operating device adjusting pressure medium flow in relation to load in proportional to electric input signal |
| JPH0517402B2 (en) * | 1981-10-10 | 1993-03-09 | Bosch Gmbh Robert | |
| JPS58206892A (en) * | 1982-05-26 | 1983-12-02 | Daikin Ind Ltd | Variable displacement type hydraulic apparatus |
| JPH0375759B2 (en) * | 1982-05-26 | 1991-12-03 | Daikin Ind Ltd |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6027841B2 (en) | 1985-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1088401A (en) | Pressure control valve | |
| AU3114384A (en) | A closed centre, load sensing hydraulic system | |
| JPS5481474A (en) | Fluid control system | |
| JPS56104186A (en) | Flow controller for power steering working fluid | |
| US5025823A (en) | Accumulator and valve structure | |
| EP0077203A3 (en) | Fluid flow control valve | |
| US4223694A (en) | Hydraulic circuit breaker | |
| JPS57157083A (en) | Oil pressure controlling apparatus | |
| GB1501761A (en) | Apparatus for regulating the output from an adjustable hydraulic pump | |
| JPS5540316A (en) | Oil hydraulic control valve | |
| KR830000129Y1 (en) | Flow control valve | |
| JPS5659068A (en) | Direction change-over valve | |
| JPS5520591A (en) | Self-actuation type regulator for reducing valve | |
| JPS5646179A (en) | Pressure controller | |
| JPS5596388A (en) | Vane pump | |
| JPS5339501A (en) | Hydraulic pressure circuit to maintain delivery of hydraulic pressure pump constant | |
| JPS5614318A (en) | Pilot operating type reducing valve | |
| JPS56131805A (en) | Combination valve | |
| JPS5675246A (en) | Load-responsible valve | |
| JPS57116912A (en) | Composite valve | |
| JPS574444A (en) | Deceleration-responsive liquid pressure control valve | |
| JPS56126688A (en) | Pump device for power steering | |
| JPS57102587A (en) | Variable-volume type fluid pressure pump apparatus | |
| JPS562245A (en) | Deceleration sensitive type liquid pressure control device | |
| JPS57107403A (en) | Hydraulic control unit |