Dongqu Mine of Shanxi Coking Coal Xishan Coal Electricity

针对东曲矿MG2×55/250-BW型采煤机在18404工作面开采中出现的滚筒螺旋叶片磨损失效问题,采用离散元仿真分析的方法对MG2×55/250-BW型采煤机进行了叶片磨损分析,通过基于离散元法的采煤机滚筒三维模型构建与采煤机滚筒落煤空间模型构建,完成了MG2×55/250-BW型采煤机滚筒截割模型;通过对采煤机滚筒螺旋叶片磨损仿真分析,得出滚筒转速与螺旋叶片磨损量呈负相关,坚固性系数、牵引速度以及螺旋升角与螺旋叶片磨损量呈正相关。通过采煤机滚筒多目标方案设计、采煤机滚筒自适应截割系统整体设计以及自适应修正控制系统设计,完成了自适应截割系统设计。工程实践分析得出,自适应截割系统使采煤机装煤率提升了1.3%,叶片磨损量减少了1.1002mm,降低了企业成本,提升了企业效率,符合相关的优化分析要求。

Aiming at the problem of wear and failure of the roller spiral blades occurs during the MG2×55/250-BW type shearer mining in the 18404 working face of Dongqu Mine, a discrete element simulation analysis method is used to analyze the blade wear of the MG2×55/250-BW type shearer. Through the construction of a three-dimensional model of the shearer roller and the construction of the coal falling space model of the shearer roller based on the discrete element method, the cutting model of the MG2×55/250-BW type shearer roller is completed; Through simulation analysis of the spiral blades wear of the shearer roller, it is found that the roller rotary speed is negatively correlated with the wear amount of the spiral blades, while the solidity coefficient, traction speed, and spiral lift angle are positively correlated with the wear amount of the spiral blades. The design of the self-adaption cutting system is completed through the multi-objective scheme design of the shearer roller, the overall design of the shearer roller self-adaption cutting system, and the design of the self-adaption correction control system. The engineering practice analysis obtains that the self-adaption cutting system increases the coal loading rate of the shearer by 1.3%, reduces blade wear amount by 1.100 2 mm, lowers enterprise costs, improves enterprise efficiency, and meets relevant optimization analysis requirements.