The invention discloses a landing leg hydraulic system and engineering machinery, the landing leg hydraulic system comprises a multi-way valve, the front end of the multi-way valve is connected with a main pressure oil way, and the rear end of the multi-way valve is respectively connected with and controls a plurality of lateral landing leg oil cylinders; the low-pressure oil way is branched from the main pressure oil way and is provided with a pressure reducing valve group for reducing the pressure of the high-pressure oil in the main pressure oil way into low-pressure oil; and the low-pressure oil of the low-pressure oil way supplies and drives the executing mechanism. The engineering machinery comprises the supporting leg hydraulic system and the right front supporting leg serving as an executing mechanism. According to the novel landing leg hydraulic system, stretching and retracting of the landing leg oil cylinders are accurately controlled, the front landing legs are controlled at low pressure, more energy is saved, meanwhile, the switching valves are adopted for control, and the cost is lower; when low-pressure control is adopted, the supporting foot plate of the front supporting leg cannot stretch out after making contact with the ground, the pre-stress of the supporting leg is greatly reduced even if a user conducts misoperation, part of lifting capacity of front operation can be effectively released, and safety is higher.

    本发明公开了一种支腿液压系统和工程机械,支腿液压系统包括多路阀,多路阀的阀前端连接有主压力油路,且阀后端分别连接控制多个侧向支腿油缸;低压油路,从主压力油路中旁支分出,并设有用于将主压力油路的高压油减压为低压油的减压阀组;执行机构,低压油路的低压油供应并驱动执行机构。工程机械包括支腿液压系统以及作为执行机构的正前支腿。根据本发明的新支腿液压系统,各支腿油缸伸缩实现了精准控制,正前支腿采用低压控制,更节能,同时采用开关阀控制,成本更低;在采用低压控制时,正前支腿的支脚板接触地面后就不能再伸出,即便用户误操作时,支腿预受力也大大降低,可有效释放部分前方作业的起重量,也更安全。


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    Title :

    Supporting leg hydraulic system and engineering machinery


    Additional title:

    支腿液压系统和工程机械


    Contributors:
    HUANG ZHEN (author) / HE WEI (author) / LI BO (author) / CAO JIBING (author) / SHEN CHANGWU (author)

    Publication date :

    2022-07-22


    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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