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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
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meem_contribute@163.com
Abstract: In order to investigate the effect of the time-varying characteristics of tooth side clearance and bearing stiffness on the dynamic characteristics of the gear system with mass eccentricity, combined with its coupled dynamic model, the time-varying backlash and time-varying bearing stiffness were solved by Runge-Kuta algorithm, and the dynamic response of the gear system was analyzed according to different eccentricity. Firstly, a time-varying backlash model due to bearing deformation was established based on the geometric relationship, and a time-varying bearing stiffness formula for rolling bearings was derived using Hertzian contact theory. Then, based on the time-varying backlash and time-varying bearing stiffness, a dynamic model of a six-degree-of-freedom spur gear system considering tooth surface friction and mass eccentricity was established. Finally, the effects of time-varying characteristics of backlash and bearing stiffness on the dynamic response of the gear system under different eccentric distances were analyzed. The research results show that after considering the time-varying characteristics of backlash and bearing stiffness, the amplitude of dynamic transmission error respectively, increases by 16.46% and 2.02%, compared with those of constant backlash and bearing stiffness. The maximum side frequency amplitude of the corresponding system increases from 0 μm to 0.19 μm and 0.33 μm when the eccentricity increases from 0 mm to 0.5 mm and 1 mm. The mass eccentricity affects the dynamic response of the system, and with the increase of the eccentricity, it will change from a stable periodic motion to a fluctuating periodic motion, and the fluctuation amplitude is positively related to the eccentricity. At the same time, the mass eccentricity will lead to the side frequency of the system, and the amplitude of the side frequency increases with the increase of the eccentricity. Therefore, the eccentricity should be controlled within a reasonable range to prevent it from being too large and causing instability of the gear system.
Key words: tooth side clearance; mass eccentricity; eccentricity distance; time-varying bearing stiffness; time-varying backlash; dynamic response
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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
