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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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meem_contribute@163.com
Abstract: Aiming at the influence of gear body and unbalance on noise, a reducer was taken as the research object, the relevant structural analysis and calculation were carried out, and noise test of different scheme were carried out for comparison. Firstly, modal analysiswas carried out by finite element method, and two kinds of gear body of first stage driven gear was determined. Then, the noise performance was analyzed by MASTA software, smaller peak to peak of transmission error and smaller dynamic meshing force was obtained, then the optimized gear body was determined. The dynamic model of rotor shaftgear was established by considering the difference of unbalance of specialshaped gear body. The inertia force and excitation were analyzed, and the response of different unbalance was obtained. Finally, the bench test was carried out for verify design. The results indicate that the noise of the specialshaped gear body is more than 5dB lower than that of the traditional structure when reducer works above 8000r/min. When the unbalance is less than 9.29g, the statistical result of noise test is that the P value is greater than 0.05, this indicating that the unbalance has no significant influence on the reducers noise within this range.
Key words: speed transmission; gear spoke structure; unbalance; modal analysis; noise reduction; dynamic model of gear shaft; vibration system
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