Dynamic Response of Rubbing Happening In A Flexible Rotor-Bearing System

DOI

10.2991/eame-15.2015.46How to use a DOI?

Keywords

thermally induced vibration; equivalent thermal moment; stabilization time; rubbing; flexible rotor-bearing system

Abstract

To reduce the steam loss and raise the efficiency of the steam turbine, the vapour seals are applied in the inner cylinder of the steam turbine. The small gap may easily results in the rubbing happening in the inner cylinder. Sometimes, the rotor is a flexible rotor. In this paper, dynamic response of rubbing happening in a flexible rotor-bearing system was studied. A simplified flexible rotor-bearing system was constructed, whose rotating speed was between the 1st and 2nd critical rotating speed. Thermal effect was considered in the analysis, i.e. the rubbing introduce heat and result in the thermally induced vibration. The transient thermal bow was treated as a pair of moments functioning on the shaft segment where rubbing happened. Simulation shows the amplitude and phase of vibration would be stable after a long time. The severity of rubbing affect the stabilization time, which could be regarded as a diagnostic feature to identify the severity of rub happening in a flexible rotor-bearing system.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - J.M. Chen
AU  - D.X. Jiang
AU  - T.T. Deng
AU  - J.S. Wang
AU  - J.L. Zhong
AU  - S.B. Wang
PY  - 2015/07
DA  - 2015/07
TI  - Dynamic Response of Rubbing Happening In A Flexible Rotor-Bearing System
BT  - Proceedings of the 2015 International Conference on Electrical, Automation and Mechanical Engineering
PB  - Atlantis Press
SP  - 168
EP  - 171
SN  - 2352-5401
UR  - https://doi.org/10.2991/eame-15.2015.46
DO  - 10.2991/eame-15.2015.46
ID  - Chen2015/07
ER  -