冲击—回转式凿岩扭矩的计算与分析

在冲击—回转式凿岩机向岩石钻进过程中,旋转中的钻具承受着两种力矩的作用:一是驱动其旋转的动力矩;二是被钻岩石阻止其旋转的阻力矩。驱动力矩必须大于阻力矩,方可使凿岩机稳定而正常地运转。本文分析了阻力矩的构成及影响因素,建立了相应的参数计算公式和阻力矩的计算公式。为此,可根据钻头结构参数、工作状态和岩石条件。预估各种冲击—回转式凿岩必须予以保证的驱动力矩,为各种螺旋副回转机构、潜孔凿岩钻具的设计、回转电机的选择及工作状态参数的确定等提供了可靠的理论依据。

THE CALCULATION AND ANALYSIS OF TORQUE IN PERCUSSION-ROTARY DRILLING

In rock drilling process with percussion-rotary drill rotating drilling tool bears two toques: dynamic torque which drives drilling tool into rock mass, and resistance torque of rock mass. The drilling torque must be greater than resistance torque moment so as to operate the drill stably and normally, on the basis of analysis on resistance torque constitution and its influence factors, calculation formulas for related parameters and resistsnce torque were established. For this purpose according to bit structure parameters, working state and rock condition predetermination of driving torque necessary for percussion-rotary drilling provides reliable theoretical basis for the design of auxiliary screw rotation mechanisms and in-the-hole drilling tools as well as choice of rotary motor and working state parameters, etc.