The invention discloses a main winch variable-load lowering control method and a rotary drilling rig. In the lowering process of a main winch (5), the loading current of a loading unit (8) is changed before each inner section of a drill rod (6) extends out, and the torque applied to a transfer case (2) by the loading unit (8) is controlled in a smooth transition mode by changing the loading current in advance, so that the stepped changing negative load is balanced, and the lowering process is more stable. The method is used for solving the problems of poor lowering stability and large speed fluctuation caused by the stepped change of the weight of the drill rod when the main winch of the rotary drilling rig is lowered; and meanwhile, when the weight of the drill rod is large, the loading unit is used for applying certain torque to the transfer case to prevent an engine from being reversely dragged to be overspeed.

    本发明公开了一种主卷扬变载荷下放控制方法及旋挖钻机,在主卷扬(5)下放过程中,在钻杆(6)每节内节伸出之前改变加载单元(8)的加载电流,通过提前改变加载电流,以平滑过渡的方式控制加载单元(8)所施加至分动箱(2)的扭矩,以平衡阶梯变化的负负载,使下放过程更加平稳。本发明用于解决旋挖钻机主卷下放时因钻杆重量阶梯变化引起的下放稳定性欠佳和速度波动大的问题,同时在钻杆重量较大时,所述加载单元用于给分动箱施加一定的扭矩,阻止发动机被反拖超速。


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    Title :

    Main winch variable-load lowering control method and rotary drilling rig


    Additional title:

    一种主卷扬变载荷下放控制方法及旋挖钻机


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

    Publication date :

    2022-01-04


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B66D Haspeln , CAPSTANS / B66C Krane , CRANES / E21B EARTH OR ROCK DRILLING , Erd- oder Gesteinsbohren / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



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