Strength Analysis and Improvement of Rocker Arm Planetary Gear Based on Thermal-Elastic Coupling Analysis
Taking the planetary gear transmission system of MG2X250/1200-WD shearer as the research object,the thermal-elastic coupling stress analysis of the meshing surface of the gear teeth was completed.The results show that the maximum stress value of the meshing position of the solar wheel and the planetary wheel is 490.65 MPa,and the main failure mode is fatigue.In order to improve the fatigue strength of the gear teeth,the existing gear teeth were transformed into drum shape,and the finite element simulation analysis was conducted again.The results show that the maximum contact stress value of the improved planetary gear transmission system is 433.07 MPa,which is about 11.7%lower than that before the improvement.The success of tooth improvement has important reference value for reducing the structure size of shearer planetary gear transmission system and improving its working stability and fatigue life.
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