Analysis of Rotor-to-Stator Rub in a Large Steam Turbogenerator
Rotor-to-stator rub is a very common topic in rotor dynamics and several models have been proposed in the literature. Anyhow these models are often able to explain only the experimental dynamical behaviour of simple test rigs, which are deliberately reproducing a Jeffcott rotor. On the contrary case...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2007-01-01
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| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/2007/90631 |
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| Summary: | Rotor-to-stator rub is a very common topic in rotor dynamics and several models
have been proposed in the literature. Anyhow these models are often able to explain
only the experimental dynamical behaviour of simple test rigs, which are
deliberately reproducing a Jeffcott rotor. On the contrary case, histories related to
real machines are seldom presented and analysed. The aim of this paper is to
present an actual case history of a large turbogenerator unit that was subjected to
partial arc rubs. The experimental results are shown and discussed along with the
model-based diagnostic strategy employed to identify the fault severity and the
location of the shaft cross-sections where the heaviest rubs occurred. Comparisons
between experimental data and simulated vibrations caused by the identified fault
are shown to validate the proposed methodology. |
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| ISSN: | 1023-621X 1542-3034 |