Failure Inducement Factor Analysis and Optimal Design Method of Ball Bearing Cage for Aviation Motor

Author:

Cui Yongcun12,Cai Linshen1,Wang Jingjing3,Gao Xiaoguo3

Affiliation:

1. School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471023, China

2. Changzhou NRB Corporation, Changzhou 213000, China

3. Key Laboratory of Power Transmission Technology on Aero Engine, Aero Engine Corporation of China, Shenyang 110015, China

Abstract

In experiments of aviation motor bearings, when the deep-groove ball bearings are subjected to an overturning moment at high speed, it often happens that the rivet on the cage breaks and the debris invades the raceway, resulting in bearing failure. To address the problem of early failure of deep-groove ball bearing cages and rivets in aviation motors, the causes of early failure were analyzed from the aspect of cage design in this study. The influence of the raceway and cage structure parameters on the dynamic contact characteristics of the rolling element and cage under the action of overturning torque were analyzed, the weak link of the cage was determined, and the cage design parameters were optimized. The results show that with an increase in the cage width and pocket radius, the impact force between the ball and cage first decreases and then increases, and the tilt angle of the cage gradually decreases. A larger channel radius and smaller clearance can slow down the interaction between the cage and the rolling element and make the cage run more smoothly. Increasing the thickness of the cage can ensure that the rivet part of the cage is at a low stress level, and the risk of premature fatigue failure at the rivet part can be reduced by maintaining a small gap–fit relationship between the rivet and rivet holes. The research results indicate that the working condition adaptability of the bearing cage for aviation motors can be improved, and the design method for this type of bearing can be enhanced.

Funder

National Science Foundation for Young Scientists of China

Innovation Platform Project of Aero Engine Power Transmission Key Laboratory of the Aero Engine Corporation of China

Publisher

MDPI AG

Reference24 articles.

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4. An Analytical and Experimental Investigation of Ball Bearing Retainer Instabilities;Donley;J. Tribol.,2008

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