The landing leg hydraulic system comprises an oil tank, an oil inlet oil way, an oil return oil way, a plurality of electromagnetic valve sets and a plurality of pairs of landing leg oil cylinders, any pair of landing leg oil cylinders comprises a horizontal oil cylinder and a vertical oil cylinder, and each electromagnetic valve set comprises a first electromagnetic valve and a second electromagnetic valve. The first electromagnetic valve comprises an oil inlet, an oil return port, a first oil port and a second oil port, the oil inlet is communicated with an oil inlet path, the oil return port is communicated with an oil return path, the first oil port is respectively communicated with a rod cavity of the horizontal oil cylinder and a rod cavity of the vertical oil cylinder through a first oil path, and the second oil port is connected with a second oil path; the first electromagnetic valve can control the extension or retraction of the supporting leg oil cylinder; the second electromagnetic valve is arranged on the second oil way, and the second oil way is selectively communicated with the rodless cavity of the horizontal oil cylinder or the rodless cavity of the vertical oil cylinder through the second electromagnetic valve. According to the landing leg hydraulic system, the problems that in the prior art, the number of electromagnetic valves is large, and system control logic is complex can be solved, and the fault rate and cost are reduced. The invention further relates to a control method.

    本发明提供一种支腿液压系统及工程机械,包括油箱、进油油路、回油油路、多个电磁阀组和多对支腿油缸,任一对支腿油缸分别包括水平油缸和垂直油缸,电磁阀组包括第一电磁阀和第二电磁阀,第一电磁阀的进油口、回油口、第一油口和第二油口,进油口与进油油路连通,回油口与回油油路连通,第一油口通过第一油路分别与水平油缸的有杆腔、垂直油缸的有杆腔连通,第二油口接有第二油路,第一电磁阀可控制支腿油缸的伸出或缩回;第二电磁阀设置在第二油路上,第二油路通过第二电磁阀可选择地连通水平油缸的无杆腔或垂直油缸的无杆腔。本发明的支腿液压系统能够解决现有技术中电磁阀数量多、系统控制逻辑复杂的问题,降低故障率和成本。本发明还涉及一种控制方法。


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    Title :

    Landing leg hydraulic system, engineering machinery and control method of engineering machinery


    Additional title:

    支腿液压系统、工程机械及其控制方法


    Contributors:
    HUANG ZHEN (author) / HE WEI (author) / ZHOU QINGXI (author) / LIAO QIHUI (author) / SHEN CHANGWU (author)

    Publication date :

    2024-02-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66C Krane , CRANES / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



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