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1、 33 5 S Vol.33 No.5 Feb.15, 2013 2013M 2 15 Proceedings of the CSEE 2013 Chin.Soc.for Elec.Eng. 119 cI| 0258-8013 (2013) 05-0119-09 ms| TH 17 DS A Ss| 47030 Q#p+ 1u12(1S/vgZu 100083 2bvNgZu 100084) Vibration Spectral Characteristics of Localized Gear Fault of Planetary Gearboxes FENG Zhipeng1, ZHAO
2、Leilei1, CHU Fulei2(1. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2. Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China) ABSTRACT: Gear faults are usually originated from localized damage. The vi
3、bration spectral characteristics of sun, planet and ring gears with localized damage are different from those of distributed gear faults, thus it is important to investigate them for fault diagnosis of planetary gearboxes via vibration signal spectral analysis. Considering both the amplitude modulat
4、ion and the frequency modulation effects due to localized gear damage, as well as the time variation of vibration transfer paths, signal models of sun, planet and ring gear localized damage cases and their Fourier spectra were given in closed form, and the spectral characteristics were summarized. M
5、eanwhile, explicit equations for calculating the characteristic frequency of localized gear faults were deduced. The theoretical derivations were validated using experimental datasets. According to the theoretical derivations, the localized damage of sun, planet and ring gears in a planetary gearbox
6、 was detected and located via spectral analysis. KEY WORDS: wind turbine; planetary gearbox; localized fault; vibration signal model; characteristic frequency; Fourier spectrum K1 Q#pv1+sT#pAuYba#p|Q#p1ilb In#pYqTa#.Mk|TyQ#p| wVrTba#p+q9TbYVL|swTsZEsYa#pb SE1S (51075028 11272047) g1S (3102022)b Proj
7、ect supported by the National Natural Science Foundation of China (51075028, 11272047); the Beijing Natural Science Foundation (3102022). 1oM Q #p | +q 0 ?FQ0ayY/|KabtQ#pv1bQ |ZF K/Qr1-6b#p?_Q*#pyNQ#p1ilb VY(H|(VW3CbrT/|vBHWW?pCbyNB1o+7-8b QqqbQqQ17O#1b Q B% aO.MQ8bf/ # YY.WMOM/#pY.?3Mb.HMC|120 S 33 3-Tb 8Q#p|+Qivs7O/sT#p|+Ab-DQ#p|VrT#a#p+q9TbyNa#p|+Q#p1ilb 1 | 1.1 Y)| n5yY)#p|s.k|YKIn.HMy.k|i9a#p+b L!#p?3In#pYH3| HIn.o|Yb#pYH|Y3TOq#p+q (#p+qsT#p 2a#p+q9T )bfVZ7#p+q Fourier )bY)|VVoqYqq#p+q9-11m0() ()cos2 () kkkkxt a t kf t b t (1) T
