Tribodynamics of Spiral Bevel Gears under Mixed Elastohydrodynamic Lubrication 2023-01-1134

Spiral bevel gears are commonly used in heavy-duty trucks and buses. An integrated dynamics of the spiral bevel gears with mixed elastohydrodynamic lubrication is described in this study. Several loaded tooth contact analyses were performed to evaluate the kinematic parameters like contact cells, gear rolling velocity, and sliding velocity of the gear surface, as well as to calculate the mesh force variation for one mesh cycle. These kinematic quantities are used in the mixed elastohydrodynamic lubrication (EHL) calculation to determine the EHL parameters like pressure, film thickness, and shear distribution considering the surface roughness profile of the spiral bevel gears. The EHL pressure and film thickness are used in the calculation of the coefficient of friction, damping, and oil film elastohydrodynamic lubrication stiffness. These tribological parameters are used in the dynamic calculation of the spiral bevel gears. The final response calculated considering the EHL parameters is known as the tribodynamic response of the spiral bevel gears.