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针对现有比例算法与功率算法等在计算采煤机斜切进刀工况下截割阻力的不足,从截齿截入煤壁深度入手,分析了截齿参与截割的判断条件,推导了截齿切削厚度、截割阻力的理论计算方法,并利用MATLAB进行了模拟;设计了截割阻力的试验测试方案,进行了试验研究;对比分析了理论模拟与试验结果,两者在周期性、变化趋势、数值特性等方面基本一致,验证了理论分析的正确性和试验的可行性;依据对边界位置关键截齿的分析,确定了斜切进刀工况下采煤机危险截割位置为S=1.25×10~4~1.31×10~4mm。能为分析斜切进刀工况下采煤机滚筒载荷的变化情况,改善采煤机实际操作、预测事故发生等提供理论和试验依据。
Aiming at the shortcomings of the existing proportional algorithm and power algorithm in the calculation of cutting resistance under the condition of bevel cutting, the paper analyzes the conditions for the cutting teeth to participate in cutting, Cutting cutting thickness and cutting resistance, and the simulation was done by using MATLAB. The experimental test scheme of cutting resistance was designed, and the experimental research was carried out. The theoretical simulation and experimental results were contrasted and analyzed, The trend of change, the numerical characteristics and so on, which verifies the correctness of the theoretical analysis and the feasibility of the experiment. Based on the analysis of key cutters at the boundary, the cut-off position of shearer under S = 1.25 × 10 ~ 4 ~ 1.31 × 10 ~ 4mm. It can provide theoretical and experimental basis for analyzing the change of drum load of shearer under the condition of cutting infeed, improving the actual operation of shearer and predicting the accident.