发明公开
EP0911529A2 Hydraulic control valve system with non-shuttle pressure compensator
无效
带无梭压力补偿器的液压控制阀系统
- 专利标题: Hydraulic control valve system with non-shuttle pressure compensator
- 专利标题(中): 带无梭压力补偿器的液压控制阀系统
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申请号: EP98308668.7申请日: 1998-10-22
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公开(公告)号: EP0911529A2公开(公告)日: 1999-04-28
- 发明人: Wilke, Raud A.
- 申请人: Husco International, Inc.
- 申请人地址: P.O. Box 257 Waukesha, WI 53187-0257 US
- 专利权人: Husco International, Inc.
- 当前专利权人: Husco International, Inc.
- 当前专利权人地址: P.O. Box 257 Waukesha, WI 53187-0257 US
- 代理机构: Dunlop, Brian Kenneth Charles
- 优先权: US956353 19971023
- 主分类号: F15B11/05
- IPC分类号: F15B11/05 ; F15B11/16
摘要:
An improved pressure-compensated hydraulic system for feeding hydraulic fluid from a variable displacement pump (18) to multiple hydraulic actuators (20). A separate valve section (13,14,15) controls the fluid flow between the pump (18) and a different actuator (20). Each valve section (13,14,15) has a pressure compensating valve (48) with a valve member (64) and poppet (60) within a bore (62) and biased apart by a spring. The poppet (60) acts as a check valve which prevents fluid flow from the actuator (20) through the valve section (13,14,15) to the pump (18) when the back pressure from the load exceeds the pump supply pressure. A pressure differential between the load-dependent pressure and the actuator pressure determines a position of the valve member (64) which controls the pressure applied to the pump pressure control input (32).
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