The rolling bearings in the drive mechanisms of aerocraft usually run in a short running time and high-overload condition with a finite life span ( less than several hours), clockwise and counterclockwise rotation, high reliability and no lubricant running. 在飞行器传动机构中,滚动轴承需满足短时工作、高过载、正反运转、有限寿命(不超过几个小时)、高可靠性、无润滑运行等要求。