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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
P.C:
310009
E-mail:
meem_contribute@163.com
Abstract: Aiming at the problem that bearing looseness and inner ring defect occurring at the same time, which affected the dynamic characteristics of the rotor system and was not conducive to the fault diagnosis and condition monitoring of the rotor system, the dynamics model of rotor system with coupling of inner ring defect and loose bearing was proposed. The vibration dynamic characteristics of rotor system with inner ring defect-loose coupling fault bearing were analyzed. Firstly, the bearing forces were analyzed based on Hertz theory and bearing kinematics theory. Then, the dynamic model of rotor system with coupling of outer ring defect and loose bearing was established based on Hooke's law and concentrated mass method of the rotor system. Finally, the vibration response of the rotor system was obtained by numerical simulation, the influence of the rotation speed and load on the vibration characteristics of the coupled rotor system of the coupled looseness and inner ring defect were discussed, and the accuracy of the model was verified by experiments. The research results show that the characteristic frequency of dry friction is 1/2 times the rotation frequency and double the frequency, and its amplitude is proportional to the speed and load. In addition, the occurrence of 1/2 times the rotation frequency and its doubling, the combination of the rotation frequency and its doubling frequency with the inner ring defect frequency indicates that loosening and inner ring defect occur at the same time, which is also reflected in the other bearing of the rotor system. The research results provide a theoretical basis for coupling fault detection of bearing rotor system.
Key words: mechanical vibration; dynamic characteristics of vibration; coupling fault characteristics of rotor system; dynamic model of bearing; dynamic model of rotor system; fault detection
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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
