An opening and closing combined type hydraulic system for engineering machinery comprises a winch motor, a high-pressure port of the winch motor is connected with a high-pressure pipeline, and a low-pressure port of the winch motor is connected with a low-pressure pipeline; the input port of the first pump is connected to the oil tank, and the first port of the second pump is connected to the input port of the first pump; the first main rolling valve is used for communicating the output port of the first pump with the high-pressure pipeline and communicating the low-pressure pipeline with the oil tank at a first valve position and communicating the output port of the first pump with the low-pressure pipeline at a second valve position; the second main rolling valve is used for communicating a second port of the second pump with the high-pressure pipeline at a first valve position, communicating the low-pressure pipeline with the oil tank and communicating the second port of the second pump with the high-pressure pipeline at a second valve position; wherein the second pump is a two-quadrant pump capable of operating under a pump working condition and a motor working condition.

    一种用于工程机械的开闭组合式液压系统包括:卷扬马达,其高压端口连接着高压管线、低压端口连接着低压管线;第一泵和第二泵,第一泵的输入端口连接到油箱,第二泵的第一端口连接到第一泵的输入端口;第一主卷阀,其在第一阀位将第一泵的输出端口与高压管线连通、以及将低压管线与油箱连通,在第二阀位将第一泵的输出端口与低压管线连通;第二主卷阀,其在第一阀位将第二泵的第二端口与高压管线连通、以及将低压管线与油箱连通,在第二阀位将第二泵的第二端口与高压管线连通;其中,所述第二泵为能够以泵工况和马达工况运转的二象限泵。


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    Title :

    Opening and closing combined type hydraulic system for engineering machinery


    Additional title:

    用于工程机械的开闭组合式液压系统


    Contributors:
    LIAO LONGZUO (author) / GENG PAN (author) / LI XIAOLIANG (author) / ZHANG JUNFENG (author) / YANG ZHIYU (author)

    Publication date :

    2024-02-06


    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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