基于离散元的胶带端部采样冲击研究

Research on Sampling Impact of Tape End Based on Distinct Element Method

为了研究胶带端部采样器切割斗移动速度和采样过程中所受到冲击的关系,通过分析其与煤流的相互作用,引入离散单元法对胶带端部采样过程进行了研究,设定切割斗切割煤流的平移速度从5.0 m/s、5.5 m/s到7.0 m/s,得出了不同切割斗移动速度下,其在采样过程中受到的冲击力和冲击扭矩。随着切割斗平移速度的增加,可以得出水平垂直煤流方向的冲击力和沿煤流方向的冲击扭矩同步减少,其他方向的冲击力和冲击扭矩稳定波动。在切割斗平移速度为5 m/s时,其所受x、y方向的冲击力最大,分别为-26582.4 N,-7292.9 N,所受z方向的冲击扭矩最大,为-21525.8 N·m;当平移速度为6.5 m/s时,其所受z方向的冲击力最大,为10025.1 N,其所受x方向的冲击扭矩最大,为-5230.8 N·m;在切割斗平移速度为7.0 m/s时,其所受y方向的冲击扭矩最大,为-3693.7 N·m。

In order to study the relationship between the moving speed of the cutting bucket of the tape end sampler and the impact in the sampling process,the interaction between the cutting bucket and the coal flow was analyzed,and the distinct element method was introduced to study the sampling process of the tape end.The translational speed of the cutting bucket and cutting coal flow was set from 5.0 m/s,5.5 m/s to 7.0 m/s,the impact force and torque in the sampling process were received under different moving speeds.It can be concluded that with the increase of translational speed of the cutting bucket,the impact force in the horizontal and vertical coal flow direction and the impact torque in the coal flow direction decrease synchronously,while the impact force and torque in other directions fluctuate steadily.When the translational speed of the cutting bucket was 5 m/s,the maximum impact force in the x and y directions was-26582.4 N and-7292.9 N respectively,and the maximum impact torque in the z direction was-21525.8 N·m,while the speed was 6.5 m/s,the maximum impact force in the z direction was 10025.1 N,and the maximum impact torque in the x direction was-5230.8 N·m.When the translational speed of the cutting bucket was 7.0 m/s,the maximum impact torque in the y direction was-3693.7 N·m.