采煤机振动冲击截割臂结构设计

为提高螺旋滚筒切削煤岩装煤率,将振动冲击技术应用于采煤机截割臂,应用TRIZ理论设计出一种以双排五星液压马达为主要驱动装置的轻量化振动冲击截割臂,应用离散单元法对螺旋滚筒轴向振动频率进行单因素数值模拟试验,确定该因素在正交试验中的水平范围|对滚筒转速、轴向振动频率以及工作振幅三种因素进行正交试验,得到其对装煤性能的影响规律。结果表明：螺旋滚筒装煤率呈现随转速增加而降低的趋势,并得到装煤性能优选方案的装煤率为54.56%。

Structural Design and Discrete Element Analysis of Shearer Vibration Impact Cutting Arm

In order to increase the coal loading rate of the spiral drum cutting coal and rock, the vibration impact technology is applied to the shearer cutting arm, and a lightweight vibration impact cutting arm with a double-row five-star hydraulic motor as the main driving device is designed using TRIZ theory. The discrete element method is used to analyze the single-factor numerical simulation experiment of the axial vibration frequency of the spiral drum to determine the horizontal range of this factor in the orthogonal experiment; the three factors of "drum speed, axial vibration frequency and working amplitude" are orthogonalized The test analysis shows that three factors affect the coal loading performance. The results show that the coal loading rate of the spiral drum shows a trend of decreasing with the increase of speed, and the coal loading rate of the optimal coal loading performance scheme is 54.56%. The research results provide a reference for the lightweight design of coal mining machinery and the improvement of the coal loading performance of the cutting arm.