Bearing wearing life is closely related with dynamics characteristics of system in which bearing is mounted

so in order to accurately predict wear life of bearing used on planetary gears

a wear life predict ion approach of bearing for planetary gear transmission system based on dynamic model is presented. Firstly

a translationtorsional dynamics model of planetary gear transmission system involving bearing wear is built. Then

a computation model of bearing wearing capacity is established by use of tribology theory

and a prediction model of bearing wear life based on two aforementioned models is established. Finally

the impacts of bearing wear on the bearing dynamic loads and bearing wear life is analyzed

and the methods of improving the bearing wear life is presented. The analysis result indicates there is a more significant impact of the bearing wear on the bearing dynamic loads

and the bearing wear life of a planet is proportional to its st iffness

so the methods

such as the radial clearance compensat ion and axial precompression of a bearing

can be applied to improve the bearing wear.