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http://dx.doi.org/10.5050/KSNVN.2006.16.5.441

Bearing Vibration and Fatigue Life Analysis According to Fitting between Ball Bearing and Housing with Geometrical Errors  

Lee, Young-Keun (FAG 베어링 코이라(유) 연구소)
Lee, Seok-Hoon (FAG 베어링 코리아(유))
Jung, Il-Kwon (FAG 베어링 코리아(유))
Cha, Cheol-Hwan (FAG 베어링 코리아(유))
Han, Hyo-Seup (FAG 베어링 코리아(유))
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.16, no.5, 2006 , pp. 441-451 More about this Journal
Abstract
It is known that ball bearings mounted in housing or on shaft are playing a key role to keep it running smoothly. The roundness of a housing bore on which bearing outer ring is mounted with interference has directly affected the running accuracy of bearing. The running accuracy of bearing, therefore, can extend the significant influence to the rotating machinery as well. In this paper, bearing's vibration and fatigue life considering raceway roundness of ball bearing before and after mounted in housing bore are theoretically estimated. To perform analysis, a simple three degrees of freedom model was proposed and then Newton-Raphson iterative method was introduced to be utilized in the analysis. The results show that the vibration magnitude of ball bearing fitted into housing unit is appeared considerably larger than the one of its pre-assembling. And theoretical $L_{10}$ life which ninety percent of the bearing population will endure decreased in about fifty percent.
Keywords
Fitting; Roundness; Waviness; Bearing Fatigue Life; Bearing Vibration; Hertzian Contact Theory;
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