基于机电耦合动力学的采煤机截割部行星架疲劳寿命分析及优化

Fatigue Life Analysis and Optimization of Planet Carrier of Shearer Cutting Part Based on Electromechanical Coupling Dynamics

针对某大采高采煤机在煤矿井下工作时出现的行星架断裂导致的传动失效问题,利用ADAMS与MATLAB/Simulink对采煤机截割部进行了机电耦合动力学分析,获得了截割部两级行星架轴孔载荷。利用有限元方法和疲劳累计损伤理论对两级行星架进行了动力学分析和疲劳寿命分析,发现一级行星架的输出轴轴肩与二级行星架花键退刀槽处为危险区域。为此对两级行星架进行了结构优化,为采煤机截割部行星架的优化设计提供了方向。

Aiming at the transmission failure caused by the fracture of the planet carrier of a large mining height shearer when working in the coal mine, the electromechanical coupling dynamic analysis of the cutting part of the shearer was carried out by using ADAMS and MATLAB/Simulink, and the shaft hole load of the two-stage planet carrier of the cutting part was obtained. The dynamic analysis and fatigue life analysis of the two-stage planet carrier were carried out by using the finite element method and fatigue cumulative damage theory. It was found that the shoulder of the output shaft of the primary planet carrier and the spline undercut of the secondary planet carrier are dangerous areas.Therefor, the structure of the two-stage planet carrier was optimized, which provides a direction for the optimal design of the planet carrier of the cutting part of the shearer.