Abstract: In order to predict the steady-state temperature of plastic gears under grease lubrication conditions， a finite element numerical model of plastic gear operating temperature field was established based on the temperature-modulus effect and the friction heat flux-hysteresis heat flux multi heat source effect. The distribution of plastic gear steady-state temperature field and the influences of load and speed levels on steady-state temperature were studied. The results show that the temperature of steady-state temperature field decreases gradually along the normal direction of the tooth profiles， and the temperature in the depth of 0.5 mm in the inner normal direction is about 90% of the surface temperature， and the steady-state temperature increases with the increasing of loads or speeds gradually. And the operating temperature tests of POM-POM gear pairs were carried out under grease lubrication conditions and the test results are in good agreement with the simulation ones. This study may pave way to the transmission design of heavy-loading plastic gears. 

Key words: plastic gear, grease lubrication, steady-state temperature field, operating temperature test

摘要： 为预测塑料齿轮的脂润滑条件下的稳态温度，建立了考虑温度-模量效应和摩擦热流-滞后热通量多热源效应的塑料齿轮运行温度场有限元数值模型，研究了塑料齿轮稳态温度场的分布规律以及载荷和转速水平对稳态温度的影响。研究结果表明，稳态温度场的温度沿着齿廓内法线方向逐渐降低，在内法线方向0.5 mm深度处的温度约为表面温度的90%，稳态温度随着载荷或转速的增大而逐渐升高。开展了脂润滑条件下POM（聚甲醛）-POM齿轮副的运行温度试验，试验结果与仿真结果吻合良好，该研究可为高承载塑料齿轮传动设计提供支撑。

关键词: 塑料齿轮, 脂润滑, 稳态温度场, 运行温度试验