Research on Coupling Dynamic Characteristics of Short-range Cutting Transmission System of Shearer
In view of the situation that the impedance change of the coal seam in the cutting part of the shearer increases during the mining process,which is easy to cause the box body deformation of the cutting part,resulting in the failure or even destruction of the transmission system,the traditional control mode cannot adapt to the random changes of the load,strong impact and other characteristics,thus affecting the stability of coal mining and reducing the mining efficiency and other problems,a short-range cutting transmission system composed of multiple motors and coupled traction system is constructed.Combined with the simulation platform,the characteristics of the traction system are analyzed,the coal block rate and production efficiency are compared and analyzed through the optimized parameters,and the dynamic performance impact is studied through motor output torque and time-varying meshing stiffness.When the hysteresis loop bandwidth is 60 db width,the output torque of the transmission system is stable.Under external excitation of the 24 Hz dominant frequency component,rotary speed fluctuations have a significant impact on the dynamic performance of the system.Choosing appropriate control parameters can effectively improve the stability and production efficiency of the short-range cutting transmission system.
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