Contactless Diagnostics of Blade Vibration of Low-Pressure Steam Turbine Stages

0347777 - ÚT 2011 RIV BE eng C - Conference Paper (international conference)
Procházka, Pavel - Vaněk, František
Contactless Diagnostics of Blade Vibration of Low-Pressure Steam Turbine Stages.
Proceedings of ISMA2010 International Conference on Noise and Vibration Engineering including USD2010. Leuven: Katholieke Universiteit Leuven - Departement Werktuigkunde Celestijnenlaan 300B - box 2420, B-3001 Heverlee (Belgium), 2010 - (Sas, P.; Bergen, B.), s. 2921-2936. ISBN 9789073802872.
[ISMA2010 International Conference on Noise and Vibration Engineering including USD2010. Leuven (BE), 20.09.2010-22.09.2010]
Institutional research plan: CEZ:AV0Z20760514
Keywords : turbine blade * measurement of vibration * tip-timing
Subject RIV: JB - Sensors, Measurment, Regulation

The study deals with the contactless vibrodiagnostic system used for the identification of steam turbine blade stress and vibration. The tip-timing method based on the evaluation of time differences of blade passages in different rotor revolutions is described and the results of the development of a new contactless magnetoresistive sensor are presented. A new approach to the identification of blade stress and vibration based on the analysis of the amplitude differences of impulse blade signals is applied. Measurement of blade untwisting and elongation is based on characteristics of magnetoresistive sensors.
Permanent Link: http://hdl.handle.net/11104/0188475