The invention discloses a double-variable-pump load-sensitive feedback hydraulic system. The double-variable-pump load-sensitive feedback hydraulic system comprises a first variable pump, a second variable pump, a multi-way valve connected with an external load, a steering gear connected with a steering oil cylinder and a shuttle valve, wherein the first variable pump is connected with an oil inlet of the multi-way valve, the second variable pump is connected with an oil inlet of the multi-way valve and an oil inlet of the steering gear through a priority valve; a first load feedback oil port of the multi-way valve is simultaneously connected with a first output quantity hydraulic control port of the first variable pump and a first inlet of the shuttle valve, a second load feedback oil port of the steering gear is connected with a second inlet of the shuttle valve, and an outlet of the shuttle valve is connected with a second output quantity hydraulic control port of the second variable pump. When the multi-way valve needs to work, the two variable pumps participate in work at the same time, and only the second variable pump participates in work and the first variable pump does not participate in work through logic control of the shuttle valve when only the steering gear works, so that equipment loss and energy consumption are effectively reduced, and the service life of the variable pumps is prolonged.

    本发明公开一种双变量泵负载敏感反馈液压系统,包括第一变量泵、第二变量泵、连接外部负载的多路阀、连接转向油缸的转向器和梭阀,第一变量泵连接多路阀的进油口,第二变量泵通过优先阀连接多路阀的进油口和转向器的进油口,多路阀的第一负载反馈油口同时连接第一变量泵的第一输出量液控口和梭阀的第一进口,转向器的第二负载反馈油口连接梭阀的第二进口,梭阀的出口连接第二变量泵的第二输出量液控口。当多路阀需要工作时,使两个变量泵同时参与工作,当只有转向器工作时,通过梭阀的逻辑控制,仅使第二变量泵参与工作而第一变量泵不参与工作,有效减少设备损耗和能量功耗,延长变量泵的使用寿命。


    Access

    Download


    Export, share and cite



    Title :

    Double-variable-pump load-sensitive feedback hydraulic system


    Additional title:

    一种双变量泵负载敏感反馈液压系统


    Contributors:
    LI JING (author) / WANG JIANCHAO (author) / JIN YINGCHAO (author) / SONG TAO (author) / FU QI (author)

    Publication date :

    2021-06-29


    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 / B66F HOISTING, LIFTING, HAULING, OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD , Hub-, Verhol- oder Schubvorrichtungen, soweit nicht anderweitig vorgesehen, z.B. Vorrichtungen mit unmittelbarer Krafteinwirkung auf die Last



    Load-sensitive pump system, hydraulic control system and engineering machinery

    XIANG XIAOQIANG / LIU DONGHONG / TONG MENG et al. | European Patent Office | 2021

    Free access


    Positive flow hydraulic system based on load-sensitive electric control pump

    FAN XIAOTONG / MA PENGPENG / ZHANG ANMIN et al. | European Patent Office | 2024

    Free access

    Double capacity hydraulic pump

    Engineering Index Backfile | 1954


    Load-sensitive multi-way valve with double-pump confluence function

    ZHANG QI / ZHANG CHENGXING / LIU DAN et al. | European Patent Office | 2021

    Free access