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《Journal of Naval University of Engineering》 2013-01
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Experimental research on characteristics of early stages rub-impact rotor transient speed fluctuation

SUN Yun-ling1,HE Bao-shan2,JIANG Xue-wu1(1.College of Power Engineering,Naval Univ.of Engineering,Wuhan 430033,China; 2.Unit No.92957,Dinghai 316000,China)  
The rotor transient speed fluctuation signal contains so much rub-impact information which is hardly influenced by faults such as imbalance,so it can be used to diagnose early-stage rub-impact faults between the rotor and the stator.The rotor transient speed fluctuation rules were studied in simulation and experimentation.Firstly,the simulation model of rub-impact is established for speed fluctuation.Secondly,the model was used to find solution under the first order sympathetic rotating speed.It is found that the phenomena of one-point rub-impact,local rub-impact happen in turn with an increase in speed and the rotor transient speed fluctuation amplitude rises in turn.The main component in frequency spectrum is the rotating frequency in one-point rub-impact or local rub-impact.But the amplitude of high order multiple frequency with one-point rub-impact is stronger than that with local rub-impact.Finally,experiments on normal status,one-point rub-impact and two different degrees of local rub-impact were carried out respectively.The results reveal that the actually-measured rotor rotating speed fluctuation signals and their frequency spectrum analysis outcome are consistent with the results obtained in simulation.So the rotor rotating speed fluctuation signals can indicate rub-impact faults and the degree to which faults occur so as to offer a new diagnosis approach to rub-impact fault.
【CateGory Index】: TH165.3
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【Citations】
Chinese Journal Full-text Database 4 Hits
1 SUN Yun-ling1,WEI Jian-hui2,TENG Guo-sheng3(1.College of Naval Architecture and Power,Naval Univ.of Engineering,Wuhan 430033,China;2.Unit No.91708,Guangzhou 510000,China;3.Unit No.72910,Zhoushan 316000,China);Fault diagnosis of rotor rub-impact based on D-S evidence fusing[J];Journal of Naval University of Engineering;2011-03
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4 Wang Liping Ye Peiqing Wang Jinsong (Department of Precision Instruments and Mechnology, Tsinghua University Beijing, 100084) Yang Shuzi (School of Mechanical Science and Engineering, Huazhong University of Science and Technology Wuhan, 430;Bispectrum Characteristics of the Faults of Rubbing Rotor System Based on Experimental Study[J];Journal of Vibration Engineering;2002-01
【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 SUN Yun-ling,CHANG Han-bao,ZHANG Yong-xiang(College of Naval Architecture and Power,Naval Univ.of Engineering,Wuhan 430033,China);Simulation research on early rub-impact rotor radial motion signal[J];Journal of Naval University of Engineering;2010-03
2 CHEN Zhong-sheng, YANG Yong-min, HU Zheng, SHEN Guo-ji (Faculty 341, Institute of Mechatronics Engineering, National University of Defence Technology, Changsha 410073, China);Early Detection of Bearing Faults in Helicopter Gearbox Based on Cyclic-Statistics[J];Acta Aeronautica Et Astronautica Sinica;2005-03
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