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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
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No.9 Gaoguannong,Daxue Road,Hangzhou,China
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310009
E-mail:
meem_contribute@163.com
Abstract: In order to improve the fatigue life of bearings, Romax Designer engineering analysis software was used, fully considering the main factors affecting bearing life, such as radial clearance and relative inclination of inner and outer rings, to optimize the logarithmic modification of the output shaft bearing of a large MW wind turbine gearbox. Firstly, a brief analysis was conducted on the international standard ISO/TS 16281 life calculation method. Secondly, the effects of logarithmic modification under different radial clearances were analyzed. Finally, the effects of logarithmic modification under different relative inclinations of the inner and outer rings were analyzed. The research results indicate that, under the specific conditions of bearings, the optimal modification convex metric with the longest service life of ISO/TS 16281 as the optimization objective corresponds to a 2.39%~10.63% longer service life of ISO/TS 16281 compared to the optimal modification convex metric with the minimum maximum contact stress as the optimization objective.Moreover, the optimal modified convex metric with the objective of maximizing the lifespan of ISO/TS 16281 corresponds to a lifespan of 111.47%~1 054.88% longer than the unmodified ISO/TS 16281. The optimal amount of logarithmic modification for bearings is different between the optimization objective of minimizing the maximum contact stress of bearings and the optimization objective of International Standard ISO/TS 16281 with the longest service life and the resulting differences of the corresponding ISO/TS 16281 service life are significant. It is recommended to optimize the design of bearings with the longest service life of ISO/TS 16281 as the optimization objective. The research results can provide guidance or reference for the optimization design of roller bearings.
Key words: roller bearings; logarithmic modification; contact stress; fatigue life; radial clearance; relative inclination of inner and outer rings; international standard ISO/TS 16281
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