发明授权
- 专利标题: Post-pressure compensated hydraulic control valve with load sense pressure limiting
- 专利标题(中): 压力补偿液压控制阀,带负载检测压力限制
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申请号: US12109726申请日: 2008-04-25
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公开(公告)号: US07854115B2公开(公告)日: 2010-12-21
- 发明人: Andreas S. Pack , Lynn Russell
- 申请人: Andreas S. Pack , Lynn Russell
- 申请人地址: US WI Waukesha
- 专利权人: HUSCO International, Inc.
- 当前专利权人: HUSCO International, Inc.
- 当前专利权人地址: US WI Waukesha
- 代理机构: Quarles & Brady LLP
- 代理商 George E. Haas
- 主分类号: F16D31/02
- IPC分类号: F16D31/02 ; F15B13/042
摘要:
An array of valve sections in a hydraulic system are connected to a supply line, a tank return line, and a load sense line. One valve sections includes a control valve with a metering orifice through which fluid flows from the supply line to a valve outlet. A load sense node is coupled by a load sense orifice to the load sense line. A load sense pressure limiter prevents pressure at the load sense node from exceeding a threshold level. A pressure compensator is connected in a fluid path between the valve outlet and one of the hydraulic actuators. The pressure compensator opens and closes the fluid path in response to pressure at the valve outlet and pressure at the load sense node, thereby governing the maximum amount of pressure that the respective valve section can apply to the hydraulic actuator.
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