Relative shaft vibrations calibration technique for blade monitoring
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F16%3A43929814" target="_blank" >RIV/49777513:23520/16:43929814 - isvavai.cz</a>
Result on the web
<a href="https://www.scopus.com/record/display.uri?origin=resultslist&eid=2-s2.0-85002689040" target="_blank" >https://www.scopus.com/record/display.uri?origin=resultslist&eid=2-s2.0-85002689040</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Relative shaft vibrations calibration technique for blade monitoring
Original language description
The diagnostics of steam turbine components is important task not only for turbine operators, but also for developers (OEM). Monitoring of blade vibrations, mainly of last stages of low pressure parts is unexceptionable. Commonly used methods are based on stress evaluation using strain gauges or blade tip-timing (BTT) method. The symptoms of blade vibrations could also be visible in signals from relative shaft vibration (SV) sensors, which are standardly installed in turbine journal bearings. With detailed signal analysis of relative shaft vibrations it was founded, that rotor vibrations don’t contain exactly components with frequencies equal to blades natural frequencies, but frequencies given by addition and subtraction of blades natural frequencies and rotational frequency. This indicates the modulation of blade natural frequencies by rotational frequency. Results of recent research indicate very good correlation between blade vibration amplitudes calculated from BTT and from shaft vibration signals. But the levels of blade vibrations in relative shaft vibration signals are lower than 1µm so the calibration of relative shaft vibrations at frequencies related to blade natural frequencies is needed. The article describes method for blade vibration calibration and also results comparison of BTT to SV calibration for two types of LSB at power station.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20205 - Automation and control systems
Result continuities
Project
<a href="/en/project/LO1506" target="_blank" >LO1506: Sustainability support of the centre NTIS - New Technologies for the Information Society</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
The Thirteenth International Conference on Condition Monitoring and Machinery Failure Prevention Technologies CM2016 / MFPT2016
ISBN
978-1-5108-3093-6
ISSN
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e-ISSN
neuvedeno
Number of pages
11
Pages from-to
1-11
Publisher name
The British Institute for Non-Destructive Testing
Place of publication
Northampton
Event location
Novotel Paris Sud Charenton, Paříž, Francie
Event date
Oct 10, 2016
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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