Thermal Elastohydrodynamic Analysis of a Worm Gear

This study explores the elastohydrodynamic lubrication (EHL) between contacting tooth flanks of a worm gear with nonconjugate meshing action. The contact is characterized by slender-like elliptical shape and high sliding. geometry conditions for considered were obtained using analysis. Based on that, complete area was analyzed validated numerical EHL model considering non-Newtonian, thermal, transient effects. geometrical kinematic design factors that influence film formation in gears identified discussed. results show specific characteristics contacts, such as very slender root flank area, which diminishes effect entrainment speed thickness. could be supported increasing conformity to make less slender. By comparing thickness against analytically ones, relatively large differences observed except one formula minimum