Analysis on load-bearing contact characteristics of face gear tooth surface wear

Abstract

Face gear transmission is widely used in aerospace shunt-confluence transmission system. Tooth surface wear is one of the main factors affecting its bearing transmission performance and failure mode. In order to study the wear mechanism of face gear tooth surface, based on tooth contact analysis (TCA) numerical method and Archard wear theory, the UMESHMOTION subroutine in ABAQUS was developed, combining with ALE adaptive mesh technology, the finite element mesh wear model of face gear pair was established.By solving the load-bearing contact problems of worn face gear pair, the load distribution coefficient among gear tooth, tooth root bending stress, tooth surface contact stress and loaded transmission error were obtained.The result shows that the tooth root wear is the most serious and the wear at the pitch cone is close to 0.The wear law of tooth surface along tooth width direction is convex parabola and the wear law along tooth height direction is concave parabola.Moderate tooth surface wear improves the bearing contact performance of face gear.