行星排式与平行轴式减速器机械效率分析

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中图分类号：U463.212；U469.72 文献标志码：B

Mechanical efficiency analysis of speed reducer with planetary gear and parallel shaft

TANG Tianbao，MENG Siyu，YU Chuang，YU Haisheng，ZHANG Yan （Wuxi Star Drive Technology Co.，Ltd.，Wuxi 2141OO，Jiangsu，China）

Abstract： To quantitatively analyze the eficiency of speed reducers with planetary gear and paralel shaft，calculation models for the transmission efficiency of planetary gear and parallel shaft reducers are derived，and the influence of motor torque and speed on the transmission effciency of these two types of reducers is studied. The results show that the optimal eficiency of planetary gear reducers is concentrated in the medium torque and high speed operating conditions，while the optimal eficiency of parallel shaft reducers is concentrated in the low torque and high speed range；as the torque increases，the transmission efficiency of both types of reducers continuously decreases，and the transmission eficiency of planetary gear reducers is higher；as the speed increases， the transmission eficiency of both types of reducers continues to increase，and the transmission eficiency of parallel shaft reducers is higher；the main losses of the two types of reducers are concentrated in the gear meshing and bearing parts ，the gear meshing loss of planetary gear reducers accounts for the highest proportion，while the transmission lossof parallel shaft reducers is concentrated in the bearing loss.

Key words： electric vehicle； speed reducer； transmission efficiency ；transmission losses

0引言

近年来，新能源汽车飞速发展[1]，驱动电机将电能转化为动能，是新能源汽车的核心部件[2-3] 。（剩余5525字）