Dynamic Research On Cage Of Aero-engine Rolling Bearing

As one of the important parts in the aero-engine rolling bearing, the dynamic performance of the cage has a great effect on the stability and reliability of the bearing and the whole transmission system. This paper focuses on the angle contact ball bearing which is in the aero-bearing, and researches on the dynamic of the cage of the bearing, and analyses the performance of the whole bearing under the effect of the cage.Firstly, according to the geometric structure and motion form of the rolling bearing and the relevant basic theory, the paper studies the geometric and operative relationship between the internal parts of the rolling bearing. Secondly, from the theory of elastic mechanics,vibration mechanics and so on, the paper studies the force state of the internal parts of bearing, builds a quasi-dynamic model of the whole bearing, researches the sliding rate and dynamic performance of the cage, and determines the effect law which is on the dynamic performance of the cage from the load, contact angle, clearance and rotational speed of the bearing. Thirdly, the paper analyses the performance of the whole bearing, researches the influence factors of the force and torque which is on the rollers, the ratio of spin to roll and the stiffness of the bearing, and determines the effect form of the normal force which is impacted to the roller from the cage and the existence condition of the tangential force under the different conditions of the position angle. Finally, based on MATLAB the paper combines M-files method with GUIDE method to design and produce the analysis software of the quasi-dynamic of the bearing, so that the model and theory which have been builded is convenient and efficient to use .The research of this paper on the dynamic performance of the cage of the rolling bearing and the performance of the whole bearing will provide the main basis for increasing the life of the aero-engine rolling bearing and realizing the optimization design of the structure of rolling bearing.