新型薄煤层采煤机截割部振动特性研究

Vibration performance research of a new shearer cutting unit in shin coal seam

为了研究某新型薄煤层采煤机截割部的振动特性,以提高其在工作过程中的稳定性,应用Matlab、Pro/E、ADAMS和ANSYS四款软件构造的协同仿真环境建立该采煤机截割部刚柔耦合模型,利用ADAMS/Vibration模块进行强迫振动仿真,分析和讨论了截割部的主要振源频率对其振动特性的影响,结合ADAMS动力学仿真结果,运用ANSYS/LS-DYNA对截割部受力最大的一级齿轮进行了动态接触分析,并根据分析结果对齿轮副进行齿廓修形,改善了轮齿啮合状态。结果表明:该采煤机截割部系统存在易被激发的振型,需对结构进行进一步的改进和优化;合理的齿廓修行可以降低截割部齿轮在啮合过程中的冲击振动,其中截割部受力最大的一级轮齿在修行前后齿顶Z向振动加速度减小了33.8%。仿真结果为有效的提高采煤机在工作时的稳定性提供了量化依据。

In order to study the vibration performance of a new type shearer cutting unit working in thin coal seam for improving its stability in the course of work, a virtual rigid-flex coupled prototype of the shearer cutting unit is established in the co-simulation environment based on Pro/E,MATLAB, ADAMS, ANSYS. The forced vibration simulation of the shearer cutting unit is done using the ADAMS/Vibration module to analyze the effect of main vibration sources to shearer cutting unit. Combined with the ADAMS simulation result, the dynamic contact analysis of the pair of gear which bears the maximum contact force of shearer cutting unit is done by the use of ANSYS/LS-DYNA, and the profile modification is done with consideration of the dynamic contact analysis result to im-prove the engagement performance of this pair gear. The results showed that the hearer cutting unit could be motivated easily and needs some necessary optimization that profile modification reduced the shocks and vibrations of the gear pairs of shearer cutting unit, and the Z-direction vibration ac-celeration of the gear pair reduced by 33.8% after modification. These results provide a quantitative basis for the performance improvements and structural optimization of the shearer cutting unit.