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International Standard Serial Number:
ISSN 1001-4551
Sponsor:
Zhejiang University;
Zhejiang Machinery and Electrical Group
Edited by:
Editorial of Journal of Mechanical & Electrical Engineering
Chief Editor:
ZHAO Qun
Vice Chief Editor:
TANG ren-zhong,
LUO Xiang-yang
Tel:
86-571-87041360,87239525
Fax:
86-571-87239571
Add:
No.9 Gaoguannong,Daxue Road,Hangzhou,China
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310009
E-mail:
meem_contribute@163.com
Abstract: In order to analyze the effect of cracks on bearing fatigue life and improve the accuracy of fatigue life prediction, taking the deep groove ball bearing at the transmission end of the planetary gear system and the sun gear shaft as the research object, the crack analysis of the bearing was carried out according to four different gear conditions to discuss the influence of bearing crack on the bearing fatigue life. Firstly, the fatigue life of the bearing without considering the crack was analyzed, the influence of pre-crack on bearing fatigue life was considered, and the bearing fatigue life results were compared. Then, the remaining fatigue life of the bearing in the cracked state was analyzed. Finally, fatigue life test was carried out for bearing crack analysis by using bearing fatigue life testing machine. The bearing fatigue life test results and simulation results were compared and analyzed. The results show that the introduction of pre-cracks leads to a significant increase in the deformation of the bearing, and the lifespan decline rate is as high as 48%; if the bearing continues to be used when micro-cracks have occurred, the proportion of residual fatigue life of the HM1 gear is the smallest, which is 0.059%. The introduction of precrack makes the simulation prediction of bearing fatigue life closer to reality life, and the minimum error is only 5.9%; cracks can reduce the fatigue life of bearings, and the introduction of pre-cracks can make the simulation prediction of fatigue life closer to the reality,and improve the accuracy of bearing fatigue life prediction.
Key words: planetary gear system; deep groove ball bearing; bearing crack analysis; remaining fatigue life; bearing performance degradation model; crack propagation; microcracks; fatigue failure
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- Chinese Core Periodicals
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- Chinese Sci-tech Core Periodicals
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- SA, INSPEC Indexed
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- CSA: T Indexed
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- UPD:Indexed
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2010 Zhejiang Information Institute of Mechinery Industry
Technical Support：Hangzhou Bory science and technology
