Analysis on modeling and service life of pin row guide sliding shoes set on shearer under oblique cutting performances

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 perfor med. The mechanical model of the entire shearer under the bevel cutting condition is established based on the classical statics, the mathematical model of interaction f orce 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 an alysis 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 res ults show that the first4-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 a re 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 th e pin-rows.