采煤机截割部刚柔耦合动力学分析与摇臂优化研究

Analysis of rigid-flexible coupling dynamics and rocker arm optimization of shearer cutting part

以MG1000/2500-WD型采煤机为研究对象,根据采煤机截割部基本结构特征,构建采煤机截割部刚柔耦合动力学模型,从转速、加速度、啮合力、应力4个角度开展采煤机截割部仿真分析。根据仿真分析结果,获取采煤机截割部摇臂截割过程中应力云图以及关键点应力曲线,确认采煤机截割部摇臂的受力特点,再以此为基础实施摇臂优化设计,具体设计过程包括摇臂瞬态分析以及摇臂优化设计2部分。为验证所提出采煤机截割部摇臂优化设计的有效性,将优化设计应用于工程实践,最终确认优化设计具有一定的应用价值。

Taking MG1000/2500-WD shearer as the research object,according to the basic structural characteristics of the shearer cutting part,the rigid-flexible coupling dynamic model of the shearer cutting part was constructed,and the simulation analysis of the shearer cutting part was carried out from four angles:speed,acceleration,meshing force and stress,and the stress cloud map and the stress curves of the key point during the rocker arm cutting process of the shearer cutting part were obtained according to the simulation analysis results,and the force characteristics of the rocker arm of the shearer cutting part were confirmed,and then the rocker arm optimization design was implemented on this basis.The specific design process includes two parts:rocker transient analysis and rocker arm optimization design.In order to verify the effectiveness of the proposed optimal design of the rocker arm of the shearer cutting part,the optimized design is applied to engineering practice,and finally it is confirmed that the optimized design has certain application value.