The invention relates to the technical field of engineering machinery, and provides a hydraulic system, a control method thereof and engineering machinery. The hydraulic system comprises a proportional valve, a landing leg hydraulic system, an electric control switch and a controller, the landing leg hydraulic system comprises a multi-way reversing valve and a plurality of sets of landing leg oil cylinders, and an oil inlet of the multi-way reversing valve is connected with an oil outlet of the proportional valve. A plurality of groups of control oil ports of the multi-way reversing valve are connected with working oil ports of the plurality of groups of supporting leg oil cylinders in a one-to-one correspondence manner; the electric control switch and the proportional valve are connected with the controller, and the electric control switch is used for sending multi-stage flow control signals to the controller so that the controller can adjust the flow of hydraulic oil output by the proportional valve according to the multi-stage flow control signals. According to the hydraulic system, the arrangement space of the valve group is saved, and the telescopic speed of each supporting leg can be adjusted and controlled according to actual working condition requirements.

    本发明涉及工程机械技术领域,提供一种液压系统及其控制方法和工程机械。所述液压系统包括比例阀、支腿液压系统、电控开关和控制器,所述支腿液压系统包括多路换向阀和多组支腿油缸,所述多路换向阀的进油口与所述比例阀的出油口相连,所述多路换向阀的多组控制油口与多组所述支腿油缸的工作油口一一对应相连;所述电控开关和所述比例阀分别与所述控制器连接,所述电控开关用于向所述控制器发送多级流量控制信号,以供所述控制器根据多级所述流量控制信号调节所述比例阀输出的液压油流量。该液压系统节省了阀组的布置空间并可根据实际工况需要对各个支腿的伸缩速度进行调节控制。


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    Title :

    Hydraulic system, control method thereof and engineering machinery


    Additional title:

    液压系统及其控制方法和工程机械


    Contributors:
    GENG YAJIE (author) / MA FEI (author) / HE DIAN (author)

    Publication date :

    2023-04-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / B60S SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR , Warten, Reinigen, Instandsetzen, Unterstützen, Anheben oder Rangieren von Fahrzeugen, soweit nicht anderweitig vorgesehen / E04G SCAFFOLDING , Baugerüste



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