摘要
Abstract
In view of the frequent abrasion and attrition of the spiral drum blades of the MG2×55/250-BW type coal mining machine used by Wangcun Coal Industry,which leads to the enterprise production shutdown,high production costs and other problems,methods of 3D modeling analysis and discrete element numerical simulation analysis are used to simulate and analyze the drum and blades of the coal mining machine.Through simulation of the blades,it is found that the lateral force on the blades is the smallest,the cutting resistance is in the middle,and the traction resistance is the largest.The main wear on the blades is friction wear,and the root,outer edge,and tail positions of the blades are the most severely worn.Through the analysis of blade wear factors,it is found that the influence degree of the rotational speed of the coal mining machine drum is greater than the sturdiness coefficient,greater than the traction speed of the coal mining machine,and greater than the spiral rising angle of the drum blades.Through multi-objective optimization analysis of the working performance of the coal mining machine,the optimal parameters of the coal mining machine are determined to be a traction speed of 4.23 m/min,a sturdiness coefficient of 3.5,a drum rotational speed of 80.65 r/min,and a spiral rising angle of 11.56°.A self-adaptive cutting control system for coal mining machine is designed according to different coal seam gangue entrapments.Using this system,the coal loading rate of Wangcun Coal Industry increases by 1.8%,the number of replaced spiral blades due to wear decreases by 15.7%,and the annual output value increases by 13.8 million yuan,which meets the requirements of relevant optimization analysis.关键词
螺旋滚筒/磨损/离散元法/升角优化Key words
spiral drum/abrasion/discrete element method/rising angle optimization分类
矿山工程
