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Mathematical Problems in Engineering
Volume 2015, Article ID 850908, 7 pages
Research Article

Dynamic Carrying Capacity Analysis of Double-Row Four-Point Contact Ball Slewing Bearing

School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471003, China

Received 5 May 2015; Revised 31 August 2015; Accepted 16 September 2015

Academic Editor: Michael Vynnycky

Copyright © 2015 Yunfeng Li and Di Jiang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Carrying capacity is the most important performance index for slewing bearings. Maximizing the carrying capacity of slewing bearing is one pursuing goal for the bearing designer; this is usually realized by optimizing the design parameters. A method of analyzing the carrying capacity of double-row four-point contact ball slewing bearing by using dynamic carrying capacity surfaces was proposed in this paper. Based on the dynamic load carrying capacity surface of the slewing bearing, the effect of changes of the bearing design parameters, such as axial clearance, raceway groove radius coefficient, and contact angle, on the dynamic carrying capacity of the slewing bearing was researched; the trend and the degree of the effect of the micro changes of the bearing design parameters on the dynamic load carrying capacity of the bearing were discussed, and the results provide the basis for optimizing the design parameter of this type of slewing bearing.