【摘要】 为了研究采煤机运动参数的最佳匹配,以煤岩材料非线性理论与刚柔耦合多体系统动力学理论为基础,利用Ansys/LS-DYNA软件,建立了采煤机螺旋滚筒与含夹矸煤岩的耦合仿真模型。提取了煤岩破落过程中螺旋滚筒所受的三向力及三向力矩,统计了被截掉煤岩的体积,分析了运动参数与载荷波动系数、截落煤岩体积、截齿安全系数、截割比能耗、装煤率以及生产率之间的关系;运用Matlab优化工具箱,以载荷波动系数、截落煤岩体积、截齿安全系数、截割比能耗、装煤率以及生产率为目标函数,建立了采煤机螺旋滚筒运动参数的多目标优化方程。研究表明:当滚筒转速为86.3 r/min、牵引速度为3.87 m/min时,采煤机运动参数达到最优匹配,此时载荷波动系数为0.272;截割比能耗为0.784 kw·h/m~3;截齿安全系数为2.035;装煤率为57.132%;最大生产率为3.025 t/min。更多还原

【Abstract】 Based on the coal rock material nonlinear theory and rigid flexible coupling multi-body system dynamics theory,the optimal matching of the parameters of shearer was studied.Using Ansys/LS-DYNA software, the coupling simulation model was established for shearer drum with gangue coal, the coal extraction process run down by three to the spiral drum three to force and torque, the volume of coal and rock was cut out.The relationship between the motion parameters and load fluctuation coefficient, cut down the coal volume, cutter safety coefficient, cutting energy consumption, coal loading rate and productivity were analyzed using these results; Using the MATLAB optimization toolbox, the load fluctuation coefficient, cut down the coal volume, cutter safety coefficient, cutting ratio energy consumption, coal loading rate and productivity as the goal function, the multi-objective optimization equation is established for motion parameters of shearer spiral drum. The results show that: when the roller speed is 86.3 r/min, traction speed is 3.87 m/min, the motion parameters of Shearer to achieve optimal matching.In the optimal state,the load fluctuation coefficient is 0.272; the cutting energy consumption ratio is 0.784 kw·h/m~3; cutter safety coefficient is 2.035; the loading rate is 57.132%; the maximum productivity is 3.025 t/min.更多还原