发明授权
- 专利标题: Hydraulic control valve system with isolated pressure compensation
- 专利标题(中): 具有隔离压力补偿的液压控制阀系统
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申请号: US11971526申请日: 2008-01-09
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公开(公告)号: US07818966B2公开(公告)日: 2010-10-26
- 发明人: Andreas S. Pack , Jason Greenwood , Gary Pieper
- 申请人: Andreas S. Pack , Jason Greenwood , Gary Pieper
- 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
摘要:
A hydraulic valve assembly includes a pressure compensating valve in which a compensator spool is slideably received in a bore. A pre-compensator gallery connected to a metering orifice, a preload gallery leading to a hydraulic actuator, an auxiliary pump supply passage, and a load sense passage all open into the bore. The compensator spool moves in response to a pressure differential between the pre-compensator gallery and the load sense passage. That movement selectively opens and closes a first path between the pre-compensator gallery and the a preload gallery, and a second path between the auxiliary supply passage and the load sense passage. Control of these paths maintains a constant pressure drop across the metering orifice and generates a pressure signal that is employed to regulate pressure at an outlet of a pump.
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