A numerical analysis method and experimental research method for the dynamic temperature field of planetary gear system are proposed based on the comprehensive consideration of the influence of bearing gear friction heat generation and system heat dissipation conditions. The effectiveness of this method is verified by comparing the numerical analysis results with the experimental test results. The conclusions are as follows:
(1) With the increase of the rotating speed, the influence of the friction heat generation of the bearing on the tooth surface temperature is not obvious; As the load continues to increase, the bearing friction heat generation has a greater impact on the tooth surface temperature, making the planetary gear tooth surface temperature gradually higher than the sun gear tooth surface temperature.
(2) Under the condition of continuous speed increase, the temperature rises rapidly at the speed of 100-300 r/min. With the continuous increase of the speed, the temperature response changes logarithmically with the speed; When the input speed of the system is 100 r/min, 150 r/min and 200 r/min, the temperature response increases linearly with the increase of load.
(3) The temperature distribution of the system has the phenomenon that the internal meshing temperature is lower than the external meshing temperature, and the meshing surface temperature of the planetary gear is higher than other surface temperatures of the system; In the radial direction, the temperature decreases along the temperature transfer direction; In the direction of tooth width, the temperature distribution phenomenon of low high low exists.