Pressurized fluid supply system
    2.
    发明授权
    Pressurized fluid supply system 失效
    加压流体供应系统

    公开(公告)号:US5533334A

    公开(公告)日:1996-07-09

    申请号:US302912

    申请日:1994-09-19

    Abstract: A pressurized fluid supply system, in which a plurality of pressure compensation valves are connected to a pump discharge line of a hydraulic pump in parallel, and direction control valves are provided at the outlet side of each pressure compensation valve to supply a discharged pressurized fluid from the hydraulic pump to a plurality of actuators. The pressure compensation valves include a check valve portion establishing and blocking communication between the pump discharge line and the inlet port of the direction control valve, and a pressure reduction valve portion for supplying a reduced pressure from the pump discharge line. The check valve portion shifts in a valve opening direction in response to an inlet pressure and shifts in a valve closing direction in response to an outlet pressure. The pressure reduction valve portion has a first and a second pressure chamber. Pressure in the first pressure chamber urges a valve element toward a position establishing communication between the inlet side and the outlet side, and a pressure in the second pressure chamber cooperates with a spring to urge the valve element to a position blocking communication between the inlet side and the outlet side, and biasing the check valve portion toward the valve closing direction. A load pressure of the actuator, to which the pressurized fluid is supplied, is introduced into the first pressure chamber and fluidly connects all of the second pressure chambers together.

    Abstract translation: PCT No.PCT / JP93 / 00452 Sec。 371日期1994年9月19日 102(e)1994年9月19日PCT PCT 1993年4月8日PCT公布。 公开号WO93 / 21446 日期:1993年10月28日。一种压力流体供给系统,其中多个压力补偿阀并联连接到液压泵的泵排出管线,并且方向控制阀设置在每个压力补偿阀的出口侧 以将排出的加压流体从液压泵供给到多个致动器。 压力补偿阀包括建立和阻止泵排出管线与方向控制阀的入口之间的连通的止回阀部分和用于从泵排出管线提供减压的减压阀部分。 止回阀部分响应于入口压力而在阀打开方向上移动,并响应于出口压力而在关闭方向上移动。 减压阀部具有第一和第二压力室。 第一压力室中的压力促使阀元件朝向建立入口侧和出口侧之间的连通的位置,并且第二压力室中的压力与弹簧配合以将阀元件推动到阻挡入口侧 和出口侧,并且将止回阀部分朝向阀关闭方向。 将加压流体供应到的致动器的负载压力被引入到第一压力室中并将所有第二压力室流体连接在一起。

    Pressure compensation valve
    3.
    发明授权
    Pressure compensation valve 失效
    压力补偿阀

    公开(公告)号:US5485864A

    公开(公告)日:1996-01-23

    申请号:US347437

    申请日:1994-11-23

    Abstract: A pressure compensation valve is capable of distributing of an output pressurized fluid of single pressurized fluid supply source to a plurality of hydraulic loads. The pressure compensation valve is constructed with a check valve portion formed by providing, in a valve body, a valve for establishing and blocking communication between an inlet port and an outlet port, and a pressure reduction valve formed by providing, in the valve body, a spool establishing communication between a second port and a third port by a pressure in a first pressure chamber communicating with a first port and blocking communication between the second port and the third port by a pressure in a second pressure chamber communicating with the third port. The spool is biased in a direction for blocking communication between the second port and the third port by a spring while contacting the valve.

    Abstract translation: PCT No.PCT / JP93 / 00724 Sec。 371日期1994年11月23日 102(e)1994年11月23日PCT PCT 1993年5月28日PCT公布。 出版物WO93 / 24756 日期:1993年9月12日。压力补偿阀能够将单个加压流体供应源的输出加压流体分配到多个液压负载。 压力补偿阀构成为具有止回阀部,该止回阀部通过在阀体中设置用于建立和阻断入口和出口之间的连通的阀以及通过在阀体中设置形成的减压阀而形成, 阀芯通过与第一端口连通的第一压力室中的压力在第二端口和第三端口之间建立连通,并且通过与第三端口连通的第二压力室中的压力阻止第二端口和第三端口之间的连通。 阀芯在与阀门接触的同时通过弹簧阻止第二端口和第三端口之间的连通的方向偏置。

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