A central rotary body, a hydraulic transmission system and a crane are disclosed, the central rotary body comprises a rubber tube winding drum main body, the central rotary body and an auxiliary arm variable amplitude hydraulic system, the rubber tube winding drum main body is installed on the central rotary body to form a rubber tube rotary mechanism, and the auxiliary arm variable amplitude hydraulic system is connected with the central rotary body; power oil of an oil tank forms a rising path and a falling path through a load-sensitive pump, a first electric proportional pressure reducing valve pushes a main valve element auxiliary arm to change amplitude and reverse, and the oil sequentially enters a center rotary body, a rubber pipe and an amplitude-variable balance valve and then returns to a small cavity of an oil cylinder; the second electric proportional pressure reducing valve pushes the auxiliary arm of the main valve element to change the amplitude and fall direction, the oil sequentially enters the center rotary body, the rubber pipe and the amplitude change balance valve and then returns to a large cavity of the oil cylinder, and the amplitude change and fall action is completed. The system is a constant-pressure system during initial action, is automatically switched to a load-sensitive system after the pressure is established to a certain value, has the advantages of high response speed, good stability, high speed control precision, energy conservation and the like, and meets the high-altitude operation requirement of the fly jib.

    一种中心回转体、液压传输系统及起重机,包括胶管卷筒主体、中心回转体、副臂变幅液压系统,胶管卷筒主体安装于中心回转体上形成胶管回转机构,副臂变幅液压系统与中心回转体连接;油箱的动力油通过负载敏感泵形成起落两路,电比例减压阀一推动主阀芯副臂变幅起换向,油液依次进入中心回转体及胶管、变幅平衡阀后回到油缸的小腔;电比例减压阀二推动主阀芯副臂变幅落换向,油液依次进入中心回转体及胶管、变幅平衡阀后回到油缸的大腔,完成变幅落动作。本发明在初始动作时为恒压系统,压力建立到一定值后自动切换为负载敏感系统,具有响应快、平稳性好、速度控制精度高、节能等优点,满足了副臂高空作业要求。


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    Titel :

    Central rotary body, hydraulic transmission system and crane


    Weitere Titelangaben:

    一种中心回转体、液压传输系统及起重机


    Beteiligte:
    LI JIE (Autor:in) / CUI XIANGPO (Autor:in) / LI RUINIAN (Autor:in) / LI XIAOWEN (Autor:in) / ZHU KUIWEI (Autor:in) / WANG YINGKUI (Autor:in) / WANG YANG (Autor:in)

    Erscheinungsdatum :

    12.11.2024


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

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



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