Effects of Torque and Friction Coefficients on the Fretting Characteristics of Annular Face Gear Contact Interface

Abstract

In present, the annular face gear connect structures are widely used in combined rotor of heavy-duty gas turbine or aeroengine to transmit the torque and force. The fretting wear will happen on the face gear contact interfaces after long-time operation. This paper investigates the evolution of contact characteristics including contact stress, slide distance, and wear depth of face gear contact interfaces under the conditions of different torque and friction coefficients by means of finite element analysis method. It can be concluded that the distribution of the contact stress and slip distance on the face gear contact interface are inhomogeneous, and the stress close to the tooth root is the largest, so the largest wear occurs near the tooth root in the inner surface. Increased torque can improve the contact stress and slip distance. The larger friction coefficient effectively reduces the wear of contact surfaces.