The invention discloses a two-stage pressure overflow rotary reversing cushion valve, and belongs to the technical field of automobile crane rotary mechanisms. The valve body is provided with a pilot control oil port a, a pilot control oil port b, an oil inlet P, an oil return port T, a working oil port A and a working oil port B, wherein the working oil port A and the working oil port B are connected with an oil inlet and an oil outlet of a rotary motor. A main reversing valve, a first one-way valve and a second one-way valve are mounted in the valve body; a shuttle valve, a first-stage overflow valve and a second-stage overflow valve are further installed in the valve body. The working oil port A and the working oil port B are correspondingly connected to two oil inlets of the shuttle valve, and an oil outlet of the shuttle valve is connected to the first-stage overflow valve and the second-stage overflow valve. And the set pressure of the first-stage overflow valve is lower than that of the second-stage overflow valve. A two-stage pressure overflow structure is adopted, different pressure impacts can be relieved, the stability is improved, hydraulic elements and the whole pipeline are protected, the performance of the slewing mechanism of the automobile crane is improved, and meanwhile the slewing mechanism can be configured according to the requirements of a main machine to adapt to different machine types.

    本发明公开一种二级压力溢流的回转换向缓冲阀,属于汽车起重机回转机构技术领域。阀体上开设有先导控制油口a、先导控制油口b、进油口P、回油口T和连接回转马达进出油口的工作油口A、工作油口B;阀体中安装有主换向阀和第一单向阀、第二单向阀;阀体中还安装有梭阀和一级溢流阀、二级溢流阀;工作油口A、工作油口B对应连接在梭阀的两进油口,梭阀出油口分别连接至一级溢流阀、二级溢流阀;一级溢流阀的调定压力低于二级溢流阀的调定压力。本发明采用二级压力溢流结构,能够缓解不同的压力冲击,提升了稳定性,保护液压元件及整个管路,以提升汽车起重机回转机构的性能,同时还可根据主机需要来配置以适配不同机型。


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    Titel :

    Rotary reversing cushion valve for secondary pressure overflow


    Weitere Titelangaben:

    一种二级压力溢流的回转换向缓冲阀


    Beteiligte:
    TANG JIANFENG (Autor:in) / WANG XIAO (Autor:in) / WANG HAO (Autor:in)

    Erscheinungsdatum :

    2022-12-13


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

    IPC:    F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / B66C Krane , CRANES



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