Research On Dynamics Performance Of Cutting Part Of Drum Shearer And Torque Shaft

When the drum shearer cuts coal and rock mass,the force on the drum is complex and changeable.Consequently,the transmission system of shearer's cutting section bears impact load,which leads to the failure of key parts in the working process of the cutting section.So this paper takes MG1000/2500-WD drum shearer as the research object,the dynamic performance of the cutting part transmission system and the torque shaft of the cutting part of the drum shearer under impact load were studied.Firstly,in order to study the dynamic performance of the cutting part drive system of the drum shearer under impact load,the influence of the inherent mechanical characteristics of the cutting motor on the mechanical characteristics of the shearer drum is fully considered.Using SIMULINK to establish cutting motor model of Shearer,the virtual prototype model of cutting section of shearer is established by ADAMS,The motor model is used to drive the shearer cutting section,and the moment of the motor is fed back to the motor model.,the electromechanical coupling model of cutting part of Shearer Based on MATLAB/SIMULINK and ADAMS is establishedand simulated jointly.Secondly,finite element software is used to simulate the process of shearer drum cutting coal and rock mass,and the stress of shearer drum in the process of cutting coal is obtained.The load obtained by cutting simulation will be added to the shearer drum,and the mechanical-electrical joint simulation of the shearer cutting section is carried out for many times.The load curve of the final drum and the load torque and output speed curve of the cutting motor are obtained,which provides data support for the study of the dynamic law of the cutting section and the overload protection of the cutting motor.Furthermore,in order to protect the important parts of the shearer cutting section,it is necessary to optimize the design and dynamic analysis of the shearer cutting section torque axis,to ensure that the torque axis breaks in time when it reaches a certain load.The static analysis of the shearer's cutting part's torque shaft is carried out by using the finite element analysis software,and the structure and parameters of the torque shaft which can just break under the rated load are determined.Based on the rigid-flexible coupling multi-body dynamics theory,the modal neutral file of the torque shaft is established by finite element analysis software.The rigid-flexible coupling dynamics simulation of the shearer cutting part is carried out in ADAMS,and the influence of the torsion shaft with different structure and parameters on the dynamic response of other parts of the cutting part transmission system and the cutting motor is obtained.Finally,The modal analysis of the shearer cutting part's torsion shaft is carried out by using finite element analysis software,and the natural frequencies and vibration modes of each order are obtained,which can provide reference for the optimal design of the torsion shaft.