The invention relates to a hydraulic balance valve, and discloses a winch balance valve, a winch hydraulic system and hoisting engineering machinery, the winch balance valve comprises a balance valve core, a winch brake valve used for controlling a winch brake, a first oil port and a second oil port, the balance valve element is arranged on an oil way between a first oil port and a second oil port of the winch balance valve, the winch brake valve comprises an oil inlet used for being connected with a system low-pressure control oil way, and a pressure maintaining oil way is arranged between the oil inlet of the winch brake valve and the second oil port of the winch balance valve. A one-way valve is arranged on the pressure maintaining oil way so that hydraulic oil can be output to a second oil port of the winch balance valve from an oil inlet of the winch brake valve in a one-way mode. In the process that the winch motor is changed from a static state to a working state, abnormal sound caused by collision between gear teeth and pressure fluctuation generated by the abnormal sound can be reduced.

    本发明涉及液压平衡阀,公开了一种卷扬平衡阀、卷扬液压系统以及起重工程机械,该卷扬平衡阀包括平衡阀芯、用于控制卷扬制动器的卷扬制动阀、第一油口以及第二油口,所述平衡阀芯布置在所述卷扬平衡阀的第一油口与其第二油口之间的油路上,所述卷扬制动阀包括用于与系统低压控制油路连接的进油口,所述卷扬制动阀的进油口与所述卷扬平衡阀的第二油口之间设置有保压油路,所述保压油路上设有单向阀,以能够使液压油由所述卷扬制动阀的进油口单向输出到所述卷扬平衡阀的第二油口。本发明在卷扬马达由静止至工作过程中,能够减轻轮齿间碰撞造成的异响及由此产生的压力波动。


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    Title :

    Winding balance valve, winding hydraulic system and hoisting engineering machinery


    Additional title:

    卷扬平衡阀、卷扬液压系统及起重工程机械


    Contributors:
    XIA DANFENG (author) / TU XURONG (author) / TANG QIAN (author)

    Publication date :

    2022-11-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66D Haspeln , CAPSTANS / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



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