Research on thermal characteristics of gear based on parametric tooth profile modification

This paper establishes a thermal analysis model for parametric profile modification gears based on the heat transfer mechanisms of gear transmission. The main research parameters are the addendum coefficient and the modification coefficient, focusing on the spatial distribution of frictional heat flux and the gear body temperature field. The study analyzes the effects of two different methods of parametric profile modification on thermal characteristics. The results indicate that reducing the addendum coefficient can improve thermal characteristics, effectively lowering both the amplitude and gradient of the tooth surface temperature. Conversely, a decrease in the modification coefficient increases the tooth surface temperature and leads to a more uneven spatial distribution of the temperature field in the gear body, thereby deteriorating its thermal characteristics. A sensitive interval for the influence of tooth profile modification parameters on thermal characteristics is proposed, establishing an intuitive connection between tooth profile modification parameters and the thermal characteristics of gears, which provides theoretical support for the parametric design method of thermal tooth profile modification.