CHANG DeGong, QIN Zhen, SHAO Chen

(College of Electromechanical Engineering, Qingdao University of Science and

Technology, Qingdao 266061, China)

 

 

Abstract: Aiming at lack of establishment and study of efficiency model for a kind of new energy vehicles gear box at home and abroad, the structure、composition and formation mechanism of power loss of a kind of special gear box for wheel drive system were researched, the gear meshing efficiency formula and gear box stirring oil、wind resistance and bearing power loss formula were generalized, total efficiency calculation formula of gear box was put forward, basing on Matlab the impact of design parameters and working parameters on the gear box total efficiency was analyzed, the total efficiency value of the gear box and four kinds of power losses the proportion of the total power loss were calculated. The results indicate that the main sources of the gear box total power loss is mixed oil power loss and main parameters that influence the efficiency of the gear box are kinematic viscosity, the number of teeth of driving gear, the normal module . The results provide a strong theoretical basis on the estimate of gear box power loss、the further research of the design optimization and mechanical efficiency development for the vehicle.

 

Key words: inwheel drive; gear box; total efficiency analysis; design parameter