The Influence of Spinning on Thermal EHL in Elliptical Contacts

Numerical analysis was carried out for the thermal elastohydrodynamic lubrication(EHL)of elliptical Contacts with spinning and rolling.The effects of spinning under different loads on pressure, the minimum film Thickness and temperature were investigated, moreover, the influences of slide-roll ratios and angular velocity on Temperature of the middle layer film were analyzed.The results showed that ,with the increasing loads, the pressure Became higher, the film thickness became smaller, the shape of the film became more inclined, i.e. ,the Asymmetric property of the profiles of the film thickness with respect to the plane of y=0 became more obvious.Because of the spinning ,theslide-roll ratio was not aconstant. When the slide-roll ratio was larger, the film Temperature was higher, and therefore the distributions of the film temperature were no longer symmetrical with Respect to the section of y=0.On the other hand, when the angular velocity was higher, the film temperature was higher, while the pressure spike was closer to the center of the contact.