Han Xiaoming, Li Peibo, Xue Liubing, Xu Jin
School of Mechanical and Power Engineering, 12561Henan Polytechnic University, Henan Jiaozuo, China.
Sci Prog. 2022 Jan-Mar;105(1):368504221086698. doi: 10.1177/00368504221086698.
Aiming at the problem of stick-slip vibration caused by sudden drilling resistance torque during drilling in coal seam with gangue, the drilling tool dynamic model with two degree of freedom was established based on the interaction between the bit cutting teeth and the coal seam with gangue. So, the motion differential equation of torsional vibration of drilling tool was derived, and the torsional vibration response of drilling tool was analyzed. Taking the drilling tool with drilling depth of 300 m as an example, the response laws of angular displacement, angular velocity, resistance torque, driving torque, relative motion phase trajectory and torsional vibration of the drill bit were discussed. The results show that the drilling tool has obvious stick-slip vibration under the action of sudden drilling resistance in the process of drilling in coal seam with gangue. The angular velocity of the drill bit moves alternately between the viscous stage and the sliding stage. A stable limit cycle will appear in the phase trajectory curve of the drill bit.
针对在含矸煤层钻进过程中，钻遇阻力矩突变引起的钻具粘滑振动问题，基于钻头切削齿与含矸煤层之间的相互作用，建立了二自由度钻具动力学模型。据此推导了钻具扭转振动的运动微分方程，并对钻具扭转振动响应进行了分析。以钻进深度为300 m的钻具为例，探讨了钻头角位移、角速度、阻力矩、驱动转矩、相对运动相轨迹及扭转振动的响应规律。结果表明，在含矸煤层钻进过程中，钻具在钻遇阻力突变作用下存在明显的粘滑振动，钻头角速度在粘性阶段和滑动阶段交替变化，钻头相轨迹曲线会出现稳定的极限环。
