Meshing model and temperature field analysis of small module gear with curve configuration

This paper provides a new approach for the design of small module gear with curve configuration, and studies the meshing temperature rise of the generated tooth surface under dry running condition. To predict the meshing temperature of small module gear with curve configuration, the normal load and motion velocity of two contact points are analyzed based on vector mapping method, and the contact stress and contact deformation are obtained based on Hertzian contact theory. The frictional heat flux at different speed and torque is calculated as the heat source, and the convective heat transfer coefficient of tooth surfaces are calculated as the heat dissipation condition. Finite element model of temperature field of small module gear with curve configuration is established, and the meshing temperature field is obtained. Variation trend of the maximum steady-state temperature is in good agreement with the experimental test results. Simulation results of flash temperature also agree well with Blok theory. The results show the rotational speed and the torque are high, the meshing temperature rise of the gear pair will be high. The maximum temperature is distributed in the middle area of single tooth on the first contact trace of the gear.