斜切工况下采煤机销排导向滑靴模态与寿命分析

摘要

针对采煤机销排易损坏的问题,对采煤机销排的模态特性和可靠性进行分析,采用经典静力学理论建立了斜切工况下采煤机整机力学模型,推导出导向滑靴与销排间相互作用力的数学模型,编制MATLAB程序对模型进行求解,并以此为基础,采用ANSYS-Workbench对导向滑靴、销排的模态特性和疲劳寿命进行仿真分析,结果表明:导向滑靴的前四阶模态频率分别为288.57、326.28、348.11、631.57 Hz,销排的前四阶模态频率分别为0.004 2、1 047.9、1 452、1 916.6 Hz,销排的疲劳寿命为106次,危险点位于销排两侧连接耳板处,销排安全系数的最小值为2.932 01.研究结果可为销排的优化设计及损坏原因分析提供参考.%Aiming at the problem that the pin-rows of shearer are vulnerable,the analysis for mode characteristics and the reliability of shearer pin-rows are performed.The mechanical model of the entire shearer under the bevel cutting condition is established based on the classical statics,the mathematical model of interaction force between the guiding sliding boots and the pin-rows is derived,and the model is solved by the program composition with MATLAB.Based on that,the simulation analysis of the mode characteristics and the fatigue lifetimes for the guiding sliding boots and the pin-rows are performed by using ANSYS-Workbench.The simulation results show that the first 4-order mode frequencies of the guiding sliding boots are 288.57,326.28,348.11,631.57 Hz,the first 4-order mode frequencies of the pin -rows are 0.004 2,1 047.9,1 452,1 916.6 Hz,the pin-row fatigue lifetime is 106 times,the dangerous points are located in the connection plates on both sides of the pin-rows,the minimum value of the pin-row safety coefficient is 2.932 01.The research result provides the references to the optimal design and the damage source analysis of the pin-rows.