The invention discloses a main winch system of a rotary drilling rig. The main winch system adopts a closed loop to absorb gravitational potential energy of a drill rod when a main winch is lowered, so that the load rate of an engine is reduced, and fuel consumption is saved for the engine. The system comprises the engine, a transfer case, a closed main pump, an open main pump, an oil supplementing pump, a one-way valve, an overflow valve, an anti-explosion valve, a main winch motor, two electromagnetic valves, a pressure sensor, a flushing valve and two overflow valves; the engine is connected with the input end of the transfer case, and the output end of the transfer case is correspondingly connected with the closed main pump and the open main pump; a port A of the closed main pump is connected with a port A of the main winch motor, a port B of the closed main pump is connected with a port 1 of the anti-explosion valve, and a port 2 of the anti-explosion valve is connected with a port B of the main winch motor; and the oil supplementing pump is sequentially connected with the overflow valve, the one-way valve and an A/B port of the closed main pump.

    本发明公开了一种旋挖钻机主卷扬系统,采用闭式回路,吸收主卷扬下放时钻杆的重力势能,降低了发动机的负载率,为发动机节省燃油消耗。该系统包括发动机、分动箱、闭式主泵、开式主泵、补油泵、单向阀、溢流阀、防爆阀、主卷扬马达、两个电磁阀、压力传感器、冲洗阀、两个溢流阀。其中发动机与分动箱输入端连接,分动箱输出端分别与闭式主泵、开式主泵连接。闭式主泵的A口与主卷扬马达的A口连接,闭式主泵的B口与防爆阀的1口连接,防爆阀的2口与主卷扬马达的B口连接。补油泵依次与溢流阀、单向阀、闭式主泵的A/B口连接。


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    Title :

    Main winch system of rotary drilling rig


    Additional title:

    一种旋挖钻机主卷扬系统


    Contributors:
    ZHANG ZHONGHAI (author) / ZHANG YONGHUA (author) / SUN YU (author) / LIU ZHIGANG (author) / SHAN CHANGMENG (author) / MA XU (author) / MA TAO (author) / GAO XING (author) / SHAN JUNYUN (author) / ZHANG ZONGYANG (author)

    Publication date :

    2021-06-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66D Haspeln , CAPSTANS / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein / E21B EARTH OR ROCK DRILLING , Erd- oder Gesteinsbohren



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