The invention discloses a suspension arm anti-back-tilting system, a crawler crane and a control method, relates to the field of engineering machinery, and aims to improve the stability of switching of the suspension arm anti-back-tilting system among different pressure working conditions. The suspension arm anti-back-tilting system comprises a hydraulic pump, a stop valve, an oil cylinder, a first overflow valve and a pilot control valve. The hydraulic pump comprises an oil outlet. The stop valve is in fluid communication with the oil outlet. The oil cylinder comprises a rod cavity oil port and a rodless cavity oil port; and the rod cavity oil port and the rodless cavity oil port are both in fluid communication with the stop valve. The first overflow valve is in fluid communication with a rodless cavity of the oil cylinder; the pilot control valve is further in one-way fluid communication with the pilot end of the first overflow valve. According to the technical scheme, fatigue impact of counter-acting force step impact of the oil cylinder on a mechanical structure is greatly reduced, and meanwhile system operation is more stable.

    本发明公开了一种吊臂防后倾系统、履带式起重机以及控制方法,涉及工程机械领域,用以提高吊臂防后倾系统在不同压力工况之间切换的稳定性。吊臂防后倾系统包括液压泵、截止阀、油缸、第一溢流阀以及先导控制阀。液压泵包括出油口。截止阀与出油口流体连通。油缸包括有杆腔油口和无杆腔油口;有杆腔油口和无杆腔油口均与截止阀流体连通。第一溢流阀与油缸的无杆腔流体连通;先导控制阀还与第一溢流阀的先导端单向流体连通。上述技术方案,极大地减小了油缸反作用力阶跃冲击对机械结构的疲劳冲击,同时使系统运行更加平稳。


    Access

    Download


    Export, share and cite



    Title :

    Suspension arm anti-back-tilting system, crawler crane and control method


    Additional title:

    吊臂防后倾系统、履带式起重机以及控制方法


    Contributors:
    YAO XIANGBIN (author) / HE YUEHUA (author) / CHEN HAIJUN (author)

    Publication date :

    2023-05-02


    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



    Anti-back-tilting device of crane

    ZHANG YINDONG / CHEN HONGLIANG | European Patent Office | 2023

    Free access

    CRAWLER CRANE TRANSPORT METHOD, CRAWLER CRANE HANGING MEMBER, AND CRAWLER CRANE

    SHIMIZU MASATOSHI | European Patent Office | 2024

    Free access

    CRAWLER CRANE DECOMPOSITION METHOD AND CRAWLER CRANE

    SATO SHUMPEI / SUNAGA SEI | European Patent Office | 2024

    Free access

    Crawler crane pull rod control method, controller and crawler crane

    GAO CHAO / MAO JING / WANG JING et al. | European Patent Office | 2023

    Free access

    Crawler crane rotation calibration system and crawler crane rotation control system

    YU XIAOBIN / LIU SHIJIE / XIE JUN et al. | European Patent Office | 2020

    Free access