Operational Measurement of Stationary Characteristics and Positions of Shrouded Steam Turbine Blades

0458628 - ÚT 2017 RIV US eng J - Journal Article
Procházka, Pavel - Vaněk, František
Operational Measurement of Stationary Characteristics and Positions of Shrouded Steam Turbine Blades.
IEEE Transactions on Instrumentation and Measurement. Roč. 65, č. 5 (2016), s. 1079-1086. ISSN 0018-9456. E-ISSN 1557-9662
Institutional support: RVO:61388998
Keywords : displacement measurement * turbomachine blades * steam turbines
OECD category: Applied mechanics
Impact factor: 2.456, year: 2016

This paper deals with new noncontact measurement methods of stationary deflections of steam turbine blades under rotation. These methods are based on the properties of the magnetoresistive sensors developed by us, which are highly sensitive, accurate, and advantageous compared with other types of electromagnetic sensors. Biaxial sensors enable measurements not only in the circumferential but also in the axial direction, which is essential for the shrouded blades. The proposed methods were used for measurements of axial displacements at the blade root of the low-pressure turbine stages. Methods for measuring axial displacements of the shrouded blades at the tip are also presented. The description of the methods is completed by the signal records obtained by measurements at a real steam turbine.
Permanent Link: http://hdl.handle.net/11104/0258921