A Computer Solution for the Dynamic Load, Lubricant Film Thickness, and Surface Temperatures in Spiral-Bevel Gears,
GARRETT TURBINE ENGINE CO PHOENIX AZ
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A computer solution to the dynamic load in a pair of spiral-bevel gearsets was developed by solving the equations of motion for the pinion and gear shaft. An existing finite-element code was used to calculate the combined stiffness of the contacting pinion and gear teeth as a function of contacting position in the zone of action. In addition to the dynamic load analysis, a computer solution was also developed to predict the bulk surface temperature, the flash temperature, and the film thickness along the contact path. An existing finite-element heat code was also used to calculate the temperature influence coefficients from which the bulk surface temperature is calculated. Both the lubricant film thickness and the sliding traction are calculated from the recent findings in EHL theories.