斜切工况下采煤机滚筒截割煤岩仿真分析

Simulation analysis of shearer drum cutting coal-rock under oblique cutting condition

为研究斜切工况下采煤机滚筒的运动规律及受力特性,利用ADAMS建立了斜切工况下采煤机虚拟样机模型,通过运动仿真得到了斜切工况下采煤机滚筒运动曲线,并以该曲线作为滚筒运动边界条件;采用LS-DYNA对斜切工况下采煤机滚筒截割煤岩进行了模拟仿真,得到了斜切工况下滚筒受力特性。仿真结果表明:斜切工况下滚筒的截割阻力和牵引阻力逐步增大并最终趋于稳定,且截割阻力约为牵引阻力的2倍;滚筒轴向力呈先增大后减小趋势,最大轴向力出现在滚筒轴向位移达到最大时,且滚筒轴向力与轴向位移密切相关;滚筒力矩主要由截割阻力和轴向力产生,且力矩大小变化趋势与产生力矩的作用力的变化趋势一致。

In order to study movement rule and force characteristic of shearer drum under oblique cutting condition,virtual prototype model of shearer under oblique cutting condition was established by use of ADAMS,and movement curve of shearer drum was obtained through motion simulation,which was used as drum movement boundary condition.LS-DYNA was used to simulate shearer drum cutting coalrock under oblique cutting condition,and force characteristic of drum under oblique cutting condition was obtained.The simulation results show that cutting resistance and traction resistance of drum gradually increase and eventually become stable under oblique cutting condition,and the cutting resistance is 2 times as much as the traction resistance.Axial force of drum first increases and then decreases,the maximum axial force occurs when axial displacement of drum reaches the maximum,and the axial force and axial displacement of drum are closely related.Torque of drum is mainly generated by the cutting resistance andthe axial force,and change trend of the torque is consistent with that of the force generating the torque.