煤岩破落过程中螺旋滚筒的可靠性研究

为了研究采煤机螺旋滚筒的可靠性，以散体力学理论与刚柔耦合多体系统动力学理论为基础，利用EDEM软件，建立了采煤机截割部与煤壁耦合的离散元仿真模型，分析了牵引速度与装煤率之间的关系，提取了煤岩破落过程中螺旋滚筒的工作载荷并验证了其可靠性，通过ADAMS动力学仿真分析，并找出了滚筒在工作过程中的应力分布规律。研究表明:滚筒应力随着牵引速度的增大而增大，但装煤率出现先增大后减小的规律，在保证采煤机可靠性的前提下，牵引速度控制在8 m/min左右有较高的装煤率。

Study on reliability of spiral drum in the breaking and falling process of coal and rock

In order to study the reliability of spiral drum on the shearer, a discrete element simulation model coupling the cutting unit of shearer and coal wall was established by using EDEM software based on the theory of granular material mechanics and the theory of rigid-flexible coupling multi-body system dynamics. The relationship between traction speed and coal loading efficiency was analyzed, then the working load of spiral drum in the breaking and falling process of coal and rock was extracted, and its reliability was verified. The ADAMS dynamics simulation analysis was carried out, and the stress distribution laws of drum in the working process was obtained. The results showed that the stress of drum increased with the increase of traction speed, but the coal loading efficiency increased first and then decreased. Under the premise of ensuring the reliability of shearer, the traction speed should be controlled about 8 m/min for a higher coal loading efficiency.