大功率薄煤层采煤机抗振性能研究

Study on Anti-vibration Performance of High-power Thin Coal Seam Shearer

针对大功率薄煤层采煤机在截割煤、矸过程中机身振动幅度大、薄弱部位易出现失效的问题,以MG450/1050-WD采煤机为研究对象,对大功率薄煤层采煤机的抗振性能进行深入研究。采用模态分析方法,找出了采煤机在外界激励下的各阶模态振型,分析了各阶振型对采煤机的影响;以模态分析结果为理论依据,提出了抗振措施;通过布置振动传感器,在振动试验台上验证了实施效果。结果显示:实施减振措施后,测试点的振幅减弱明显,振动加速度减小超过70%。

In view of the large vibration amplitude of the body of the high-power thin seam shearer in the process of cutting coal and rock, and the failure of the weak part of the shearer, taking MG450/1050-WD shearer as the research object, the anti-vibration performance of high-power thin coal seam shearer was studied deeply. By means of modal analysis, the modes of shearer under external excitation were found out, and the influence of modes on shearer was analyzed. Based on the results of modal analysis, anti-vibration measures were proposed. Through the arrangement of vibration sensors, the implementation effect was verified on the vibration test bench. The results show that the amplitude of the test point decreases obviously and the vibration acceleration decreases by more than 70%.