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Shock and Vibration
Volume 2017 (2017), Article ID 8098591, 7 pages
Research Article

Analysis of the Impacts of Bearing on Vibration Characteristics of Rotor

1School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
2Xi’an Shaangu Power Co., Ltd., Xi’an, China
3Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment, Xi’an, China

Correspondence should be addressed to Qi Yuan

Received 23 July 2017; Accepted 1 November 2017; Published 12 December 2017

Academic Editor: Sandris Ručevskis

Copyright © 2017 Peiji Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Aiming at a Top Gas Recovery Turbine Unit (TRT) with double support rotor and the extending disk end, theoretical and experimental analysis about influence of cylindrical bearing and four-lobe bearing on vibration of TRT rotor system are conducted in this paper. The results indicate that vibration of the rotor supported by cylindrical bearing is more stable than that supported by four-lobe bearing at the driving end (DE) and the nondriving end (NDE). The amplitude of rotor is supported by both of these types of bearing increases as the speed increases at the NDE, while the amplitude of the DE remains unchanged. Comparing with the result of theoretical analysis, the practical test results are more consistent with the theoretical response analysis conducted by applying unbalanced mass at the extending disk end. This paper presents an analysis method of the critical characteristics of a double support rotor system with the extending disk end and provides reference value for dealing with vibration fault of double support rotor system with the extending disk end.