In the helicopter main reducer system

as the important source of heat

bearings have great influence on the temperature rise during working.It directly related to the performance of helicopter main reducer system.The transient and steady temperature field of the high-speed angular contact ball bearing which has been used in helicopter main reducer are analyzed based on finite volume method.Ultimately

steady-state temperature field is obtained.And the influence law which comes from the speed

lord and other factors is summarized

in order to give help to the bearing parameter design and improve the theoretical basis of the working reliability.