Competitive Reliability Analysis of Heavy-Duty Gears in The Shearer’s Cutting Part

To improve the working efficiency of the cutting head of a coal cutter, studying the reliability of the heavy-duty gears in the cutting head under the condition of competitive failure was an effective approach. A reliability model for the gears under natural aging and sudden shock failure is established using stochastic processes. The three forces and three torques acting on the gears were obtained using mechanical system simulation software, and the fatigue damage accumulation value of the gears was obtained using fatigue analysis software. The reliability model for the large gear in the cutting head under the competitive failure condition of natural aging and sudden shock failure is obtained based on the stochastic process solution parameters. The results show that the competitive reliability model proposed in this paper is beneficial for improving the accuracy of gear reliability calculation and thereby improving the working efficiency of the cutting head of the coal cutter.