Multiple hydraulic valve assembly with a monolithic block
    1.
    发明授权
    Multiple hydraulic valve assembly with a monolithic block 有权
    多个液压阀组件,带有单块

    公开(公告)号:US06505645B1

    公开(公告)日:2003-01-14

    申请号:US09972540

    申请日:2001-10-08

    IPC分类号: F15B1308

    摘要: A valve assembly has a single piece body that houses a plurality of hydraulic valves. Each valve includes a spool which controls the flow of fluid between a pair of work ports in one side of the body and a pump inlet and a tank outlet. The valves are operated by selectively applying pressurized fluid to one end or the other of the spool. That pressure is provided by a conduit or a pilot valve that is attached to a control port in the one side of the body. Because the majority of the connections to the valve assembly are made to the one side of the body access is only required to that side.

    摘要翻译: 阀组件具有容纳多个液压阀的单件本体。 每个阀包括一个阀芯,该阀芯控制主体一侧的一对工作端口与泵入口和罐出口之间的流体流动。 通过选择性地将加压流体施加到阀芯的一端或另一端来操作阀。 该压力由附接到主体一侧的控制口的导管或先导阀提供。 因为大部分与阀组件的连接是在身体的一侧进行的,所以只需在该侧面进行接近。

    Hydraulic control valve system with isolated pressure compensation
    2.
    发明授权
    Hydraulic control valve system with isolated pressure compensation 有权
    具有隔离压力补偿的液压控制阀系统

    公开(公告)号:US07818966B2

    公开(公告)日:2010-10-26

    申请号:US11971526

    申请日:2008-01-09

    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.

    摘要翻译: 液压阀组件包括压力补偿阀,其中补偿阀芯可滑动地容纳在孔中。 连接到计量孔的预补偿器库,通向液压致动器的预加载廊,辅助泵供应通道和全部通向孔的负载感测通道。 补偿器阀芯响应于预补偿器库和负载感测通道之间的压差而移动。 该运动选择性地打开和关闭预补偿器廊和预加载廊之间的第一路径,以及辅助供应通道和负载感测通道之间的第二路径。 这些路径的控制在整个计量孔口上保持恒定的压降,并产生用于调节泵出口处的压力的压力信号。

    HYDRAULIC CONTROL VALVE SYSTEM WITH ISOLATED PRESSURE COMPENSATION
    3.
    发明申请
    HYDRAULIC CONTROL VALVE SYSTEM WITH ISOLATED PRESSURE COMPENSATION 有权
    具有隔离压力补偿的液压控制阀系统

    公开(公告)号:US20090173067A1

    公开(公告)日:2009-07-09

    申请号:US11971526

    申请日:2008-01-09

    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.

    摘要翻译: 液压阀组件包括压力补偿阀,其中补偿阀芯可滑动地容纳在孔中。 连接到计量孔的预补偿器库,通向液压致动器的预加载廊,辅助泵供应通道和全部通向孔的负载感测通道。 补偿器阀芯响应于预补偿器库和负载感测通道之间的压差而移动。 该运动选择性地打开和关闭预补偿器廊和预加载廊之间的第一路径,以及辅助供应通道和负载感测通道之间的第二路径。 这些路径的控制在整个计量孔口上保持恒定的压降,并产生用于调节泵出口处的压力的压力信号。

    Post-pressure compensated hydraulic control valve with load sense pressure limiting
    4.
    发明授权
    Post-pressure compensated hydraulic control valve with load sense pressure limiting 有权
    压力补偿液压控制阀,带负载检测压力限制

    公开(公告)号:US07854115B2

    公开(公告)日:2010-12-21

    申请号:US12109726

    申请日:2008-04-25

    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.

    摘要翻译: 液压系统中的一系列阀部分连接到供应管线,罐返回管线和负载检测管线。 一个阀部分包括具有计量孔口的控制阀,流体从该供应管路流到阀出口。 负载感测节点通过负载感测孔耦合到负载感测线。 负载感测压力限制器防止负载感测节点处的压力超过阈值水平。 压力补偿器连接在阀出口和其中一个液压致动器之间的流体路径中。 压力补偿器响应于阀出口处的压力和负载感测节点处的压力来打开和关闭流体路径,从而控制相应阀部分可以施加到液压致动器的最大压力量。

    POST-PRESSURE COMPENSATED HYDRAULIC CONTROL VALVE WITH LOAD SENSE PRESSURE LIMITING
    5.
    发明申请
    POST-PRESSURE COMPENSATED HYDRAULIC CONTROL VALVE WITH LOAD SENSE PRESSURE LIMITING 有权
    后压力补偿液压控制阀,带负载感应压力限制

    公开(公告)号:US20090266070A1

    公开(公告)日:2009-10-29

    申请号:US12109726

    申请日:2008-04-25

    IPC分类号: F15B13/02

    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.

    摘要翻译: 液压系统中的一系列阀部分连接到供应管线,罐返回管线和负载检测管线。 一个阀部分包括具有计量孔口的控制阀,流体从该供应管路流到阀出口。 负载感测节点通过负载感测孔耦合到负载感测线。 负载感测压力限制器防止负载感测节点处的压力超过阈值水平。 压力补偿器连接在阀出口和其中一个液压致动器之间的流体路径中。 压力补偿器响应于阀出口处的压力和负载感测节点处的压力来打开和关闭流体路径,从而控制相应阀部分可以施加到液压致动器的最大压力量。