采煤机行星架可靠性分析与优化

Shearer planet carrier reliability analysis and optimization

基于刚柔耦合多体系统动力学和虚拟样机技术,应用Pro/E、ADAMS、Matlab和ANSYS构造协同仿真平台,建立了牵引部二级行星架为柔性构件的采煤机刚柔耦合模型。通过动力学仿真分析发现,牵引部二级行星架主要受扭转作用,其薄弱部位为花键连接处。在满足传动比条件、同心条件、均布条件和邻接条件基础上对牵引部二级行星架进行优化。通过增加薄弱环节实体材料,减小轴向尺寸、增加径向尺寸,改变轴承配置形式等措施,优化后的行星架强度和刚度均得到了一定程度的提高,有效地延长了采煤机整机使用寿命。

Based on rigid- flex coupled multi- body system dynamics and Virtual Prototype Technology（ VPT）,a co-simulation platform is constructed using the softwares of Pro / Engineer,ADAMS,Matlab and ANSYS,then a rigid-flex coupled virtual prototyping model of shearer with flex haulage unit second planet carrier is built. Dynamics simulation analysis shows that,the planet carrier＇s weak link is in the integral key seat,and the haulage unit second planet carrier mainly bears torsion moment. Haulage unit second planet carrier is optimized based on satisfied transmission ratio,concentric condition,equispaced condition,and adjacency condition. Strength and stiffness of the optimized planet carrier are improved through increasing solid material of weak link,reducing axial dimensions,increasing radial dimension,and changing bearings＇ configuration form. At the same time,the shear＇s service life is effectively extended.