Torsional vibration encoder-based monitoring methods and their experimental validation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F19%3A43955720" target="_blank" >RIV/49777513:23520/19:43955720 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1784/cm.2019.131" target="_blank" >http://dx.doi.org/10.1784/cm.2019.131</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1784/cm.2019.131" target="_blank" >10.1784/cm.2019.131</a>

Result language
angličtina
Original language name
Torsional vibration encoder-based monitoring methods and their experimental validation
Original language description
Excessive torsional vibration of turbine generator rotors and torsionally induced blade vibration result in fatigue cracks arising at the shaft surface or blade roots. If not early detected severe damage to the machine can occur. Torsional vibration, however, is not measurable with standard vibration sensors and thus a specialized measurement must be used. In this paper, two encoder-based measurement methods are discussed. The first method is using an optical sensor together with a reflexive zebra-tape encoder. The second method is using an eddy-current sensor together with a copper incremental encoder. For both methods the measured signal quality and its usability for torsional analysis is compared. Experimental data were obtained on a test rig as well as on a steam turbine generator. Both methods prove to be suitable for obtaining the times of arrival of encoder markers used for instantaneous angular velocity and torsional vibration evaluation. However, the eddy current method suits better for practical applications where dirt and contamination by oil is a concern.
Czech name
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Czech description
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Project
<a href="/en/project/EF17_048%2F0007267" target="_blank" >EF17_048/0007267: Research and Development of Intelligent Components of Advanced Technologies for the Pilsen Metropolitan Area (InteCom)</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proceedings of The Sixteenth International Conference on Condition Monitoring and Asset Management – CM 2019
ISBN
978-1-5108-8977-4
ISSN
2632-637X
e-ISSN
—
Number of pages
8
Pages from-to
1-8
Publisher name
The British Institute for Non-Destructive Testing
Place of publication
Northampton, UK
Event location
Glasgow, UK
Event date
Jun 25, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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