The wear and contact fatigue of involute modified gears under minimum quantity lubrication were investigated through updated contact path and measurement of the updated profiles. The results indicated that the wear depth of pitch line was not the minimum, there was relative sliding on the pitch line during the wear process and the surface damage had a great influence on it. Continuous wear moves the point of minimum sliding in direction of the addendum/dedendum and the wear minimum is at the point with minimum sliding. Due to repeated contact occurred on the tooth surface near the root of wheel, the maximum wear depth of wheel was at a position between the dedendum and the pitch line, and its surface roughness was the lowest.

通过更新接触路径和测量更新轮廓，研究了最小量润滑下渐开线改进齿轮的磨损和接触疲劳。结果表明，节线磨损深度不是最小的，磨损过程中节线存在相对滑动，表面损伤对其影响较大。连续磨损使最小滑动点向齿顶/齿根方向移动，磨损最小值位于滑动最小的点。由于轮子根部附近的齿面发生反复接触，轮子的最大磨损深度在齿根和节线之间的位置，其表面粗糙度最低。