The invention discloses an arm support hydraulic control system and engineering machinery. The arm support hydraulic control system comprises a leveling oil cylinder (1); the working platform main valve (2) comprises a leveling valve core (21) for controlling the leveling oil cylinder (1), a platform main valve load feedback oil port (LS1) and a platform main valve oil inlet (P1); and the pressure increasing valve (22) is used for increasing the pressure of the hydraulic oil of the platform main valve oil inlet (P1) and enabling the hydraulic oil to flow to the platform main valve load feedback oil port (LS1). By arranging the pressure increasing valve, the load pressure of the leveling valve element is increased, the pressure establishing time can be shortened, the response speed of the leveling action and the like can be increased, the pressure of the pressure increasing valve can be adjusted according to the actual situation, the pressure increasing valve can adjust the pressure increasing pressure according to the actual situation compared with a constant-pressure system which is close to the overflow system pressure, and the leveling effect is improved. Self-adaptive adjustment of load pressure is achieved, the purpose of quick response is achieved, meanwhile, the energy-saving effect is obvious, and the using effect is better.

    本申请属于公开了一种臂架液压控制系统和工程机械,臂架液压控制系统包括调平油缸(1);工作平台主阀(2),包括用于控制所述调平油缸(1)的调平阀芯(21)、平台主阀负载反馈油口(LS1)和平台主阀进油口(P1);增压阀(22),用于使所述平台主阀进油口(P1)的液压油增压并流向所述平台主阀负载反馈油口(LS1)。本申请通过设置增压阀,对调平阀芯的负载压力进行增压,可减小压力建立的时间,提高调平动作等的响应速度,且增压阀的压力可以根据实际情况进行调节,相对于恒压系统接近溢流的系统压力,增压阀可根据实际情况调节增压压力,实现负载压力自适应调节,达到快速响应目的同时,节能效果明显,使用效果更佳。


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    Title :

    Cantilever crane hydraulic control system and engineering machinery


    Additional title:

    臂架液压控制系统和工程机械


    Contributors:
    CHEN QING (author) / XIAO CHENGFENG (author) / YANG GANG (author) / SONG YIDA (author)

    Publication date :

    2023-08-22


    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 / B66C Krane , CRANES



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