Number of the records: 1
Contactless Diagnostics of Turbine Blade Vibration and Damage
- 1.
SYSNO ASEP 0363222 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Contactless Diagnostics of Turbine Blade Vibration and Damage Author(s) Procházka, Pavel (UT-L) RID, ORCID
Vaněk, František (UT-L) RIDSource Title Journal of Physics: Conference Series. - : Institute of Physics Publishing - ISSN 1742-6588
Roč. 305, č. 1 (2011), s. 1-11Number of pages 11 s. Action International Conference on Damage Assessment of Structures (DAMAS 2011) /9./ Event date 11.07.2011-13.07.2011 VEvent location Oxford Country GB - United Kingdom Event type WRD Language eng - English Country GB - United Kingdom Keywords steam turbine ; blade damage assessment ; tip-timing method Subject RIV JL - Materials Fatigue, Friction Mechanics CEZ AV0Z20760514 - UT-L (2005-2011) UT WOS 000309681100109 DOI 10.1088/1742-6596/305/1/012116 Annotation The tip-timing method based on the evaluation of time differences of blade passages in different rotor revolutions has been modified and improved to provide more precise and reliable results. A new approach to the analysis of the amplitude and time differences of impulse signals generated by a blade passage has been applied. Amplitudes and frequencies of vibrations and static position of blades ascertained by the diagnostic process are used to establish the state of blade damage. A contactless diagnostic system VDS-UT based on magneto-resistive sensors was developed in the Institute of Thermomechanics Academy of Sciences of the Czech Republic. The system provides on-line monitoring of vibration amplitudes and frequencies of all blades and notification of possible blade damage.Evaluation of the axial and circumferential components of the deflections by measuring the amplitude of blade impulse signals results in an overall improvement of the method. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2012 Electronic address http://iopscience.iop.org/1742-6596/305/1/012116
Number of the records: 1