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Stress distribution law in subsurface crack region of cylindrical roller bearing

Published:2023-04-20 author:DANG Xiao-yong, SHI Zhi-feng, LIU Jing. Browse: 452 Check PDF documents

Stress distribution law in subsurface crack region

of cylindrical roller bearing

DANG Xiao-yong1, SHI Zhi-feng2, LIU Jing3

(1.Beijing Power Machinery Institute, Beijing 100074, China; 2.College of Mechanical Engineering, Chongqing

University, Chongqing 400044, China; 3.Key Laboratory for Unmanned Underwater Vehicle, Northwestern

Polytechnical University, Xi‘’an 710072, China)

Abstract: The subsurface cracks in the raceway of a roller bearing will change the contact characteristics between the roller and raceway, which can affect the operational performances of the bearing. Aiming at this problem, the effects of the length, width and slant angle of subsurface cracks on the stress distribution in the crack zone were studied. Firstly, by using the finite element method, a finite element (FE) model for the roller-raceway contact was presented, the calculation results from the finite element model and the Hetzian contact theory were compared to verify the correctness of the finite element model. Then, based on the morphological characteristics of the subsurface cracks in cylindrical roller bearings, a finite element calculation model with subsurface cracks of roller-raceway contact was proposed. Finally, based on the finite element model, the effects of the length, width, and slant angle of the subsurface crack on the stress distribution around the subsurface crack zone were discussed. The research results show that the depth and width of the stress zone increase with the subsurface crack width. The depth and width of the stress zone decrease with the subsurface crack depth. Moreover, for the subsurface cracks with the same height and width, the stress zone decreases with the slant angle of the subsurface crack; and the subsurface crack with a larger slant angle has a smaller effect on the contact characteristics.

Key words: rolling bearing; roller bearing; bearing operating characteristics; crack length, width and slope; contact characteristics; raceway stress zone

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