Research on Thermal Elastohydrodynamic Lubrication of Cylindrical Gears with Curvilinear Shaped Teeth

Based on meshing theory and the machining theory of cylindrical gears with curvilinear shaped teeth (CGCST), the tooth surface equation of CGCST is obtained. The modeling of arc tooth cylindrical gear pair was built by UG. Considering the contact geometry, relative velocity, entrainment velocity and load etc, the thermal elastohydrodynamic lubrication model of arc tooth cylindrical gear pair is established. The paper researched the arc tooth cylindrical gear pair in the meshing process by numerical analysis, including the law of oil film pressure, oil film thickness arid temperature variation. It investigated the influence of the entrainment velocity and load on the oil film pressure, thickness and temperature of the tooth surface. The result shows that though the two pressure peaks, thickness and temperature rise of the arc tooth cylindrical gear pair's oil film are greatly influenced by the entrainment velocity and load, the corresponding laws are existing. The results of this study have a guiding role in the tribological design of arc tooth cylindrical gear and provide theoretical basis and engineering application value for the industrial applications of arc tooth cylindrical gears under the high speed and heavy load.