Research on the influence of backlash and bearing clearance on torsional vibration of pure electric vehicle gear system
by Xiangqin Li; Qingsong Cao; Xiaoping Zhang; Xiaolin Gao
International Journal of Vehicle Noise and Vibration (IJVNV), Vol. 17, No. 3/4, 2021

Abstract: In order to analyse the gear vibration characteristics of an electric vehicle transmission system, the dynamic model of gear transmission system with two speed transmission including backlash and bearing clearance is established. The factors of gear meshing stiffness, gear meshing damping, transmission shaft stiffness, transmission shaft damping, gear dynamic transmission error, gear pair meshing force and other factors are comprehensively considered in the model. The model is solved by the Runge Kutta method, and the dynamic response characteristics of the gear backlash and support bearing radial clearance of the electric vehicle transmission system are simulated and analysed by the MATLAB software. The results show that changing the gear backlash and support bearing clearance in a certain range would produce an effect on the vibration characteristics of the electric vehicle gear transmission system. The gear backlash would affect the amplitude of radial vibration displacement and acceleration of bearing, when the gear transmission error increases, the radial vibration displacement of the bearing decreases, which indicates that there is a coupling relationship between the backlash and the bearing clearance.

Online publication date: Mon, 20-Jun-2022

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