Proceedings of the 2015 International Conference on Electrical, Automation and Mechanical Engineering

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

Authors
J.M. Chen, D.X. Jiang, T.T. Deng, J.S. Wang, J.L. Zhong, S.B. Wang
Corresponding Author
J.M. Chen
Available Online July 2015.
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/).

Download article (PDF)

Volume Title
Proceedings of the 2015 International Conference on Electrical, Automation and Mechanical Engineering
Series
Advances in Engineering Research
Publication Date
July 2015
ISBN
978-94-62520-71-4
ISSN
2352-5401
DOI
10.2991/eame-15.2015.46How to use a DOI?
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/).

Cite this article

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  -