SUN Hui-fang, PAN Luo-ping, ZHANG Fei, CAO Deng-feng

China Institute of Water Resources and Hydropower Research, Beijing 100038, China

Abstract: A review on the research progress of shaft orbit in terms of failure mechanism, orbit purification, feature extraction and identification is presented. Considering different characteristics, widely employed identification methods and principles of shaft orbits have been introduced. Comparisons of identification methods, including completeness of contents, boundedness of identification methods and efficiency of unknown fault, have been performed. Further research of precession direction and stability of shaft orbit is necessary. Fusion of various methods is the new trend of development. The development of signal analysis techniques will also provide reliable technical support.

Key words: rotating machinery, shaft orbit, identification methods, fault diagnosis, hydro-power generating units

Published in: Journal of China Institute of Water Resources and Hydropower Research (Vol. 12 No. 1, 2014)