The Research On The Shearer Variable Frequeney Speed Regulation System And Reliability Analysis On Key Parts

Shearer is one of the important mechines on the fully mechanized working surface, and the situation of working is very complex. The haulage unit is a major and easily damaged part for shearer, its reliability decides the performance and efficiency of shearer. In recent years, the shearer of electrical traction become the main direction of research around the world, in order to improve the efficiency of shearer, the speed and the force of traction increase very fast, meanwhile the strength and lifetime of key parts in the shearer also increase fast, and the control system of haulage unit is more requested. In order to satisfy the working efficiency and the reliability of the key parts, firstly the dynamic characteristic of the traction control system is researched, then the principle of variable frequency speed regulation controlled by direct torque is in combination with the characteristics of the shearer speed regulation system, finally the simulation model of speed regulation system controlled by direct torque is builded in MATLAB to verify the feasibility of the traction control system.In different conditions, different haulage speed and haulage force may affect the situation of the force for key parts, so the reliability of the key parts is impacted. road wheel is one of the important parts, so the reliability of its road wheel are analyzed, firstly the three-dimensional geometrical model of the shearer is established in PRO/E, then the kinematics simulation is done in ADAMS, after that the road wheel is analysed in LS-DYNA, finally the fatigue is analysed by the module of the fatigue in ANSYS to verify the reliability of the key parts in the shearer. This method has important significance for the design and research of the electric traction shearer.