The utility model discloses a load-sensitive multi-way valve with a double-pump confluence function, and relates to the technical field of hydraulic pressure of straight-arm lorry-mounted cranes. The load-sensitive multi-way valve comprises a first pump oil inlet control unit, a proportional reversing valve working unit, a confluence control unit, a rotation reversing unit and a second pump oil inlet control unit. The first pump oil inlet control unit is connected with a first quantitative oil pump and supplies oil to the proportional reversing valve working unit, the second pump oil inlet control unit is connected with a second quantitative oil pump and supplies oil to the rotation reversing unit, and when the rotation reversing unit does not work, the second quantitative oil pump and the first quantitative oil pump are converged through a one-way valve and a hydraulic control reversing valve of the converging control unit; the two pumps simultaneously supply oil to the proportional reversing valve working unit, so that the working efficiency is improved; and when the rotation reversing unit works, the hydraulic control reversing valve of the confluence control unit cuts off a confluence channel of the second quantitative oil pump and the first quantitative oil pump, the second quantitative oil pump independently supplies oil to the rotation reversing unit, rotation action flow matching is achieved, and energy consumption and system temperature rise are reduced.

    一种带双泵合流功能的负载敏感多路阀,涉及直臂随车起重机液压技术领域。包括第一泵进油控制联、比例换向阀工作联、合流控制联、回转换向联和第二泵进油控制联;第一泵进油控制联与第一定量油泵连接,并向比例换向阀工作联供油,第二泵进油控制联与第二定量油泵连接,向回转换向联供油,当回转换向联不工作时,通过单向阀及合流控制联的液控换向阀,使第二定量油泵与第一定量油泵合流,两泵同时向比例换向阀工作联供油,提高作业效率;当回转换向联工作时,合流控制联的液控换向阀切断第二定量油泵与第一定量油泵的合流通道,第二定量油泵向回转换向联独立供油,实现回转动作流量匹配、降低能耗与系统温升。


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    Title :

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


    Additional title:

    一种带双泵合流功能的负载敏感多路阀


    Contributors:
    ZHANG QI (author) / ZHANG CHENGXING (author) / LIU DAN (author) / XIN SHAOYUN (author) / DING HAODONG (author)

    Publication date :

    2021-12-14


    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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