The rotordynamic analysis of the vibration considering the hydro-electric force supported by rolling elements in 500 kW Francis turbine

A Francis turbine which is one of the reaction water turbine types is mainly used in the multipurpose dam. The purpose of this research is to explain the vibration characteristics due to the various causes generated in Francis-turbines generator system. The hydrodynamic force was determined to use t...

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Bibliographic Details
Published in:Journal of mechanical science and technology 2017, 31(11), , pp.5153-5159
Main Authors: Kim, Jung-wan, Kwak, Won-il, Choe, Bok-seong, Kim, Hyoung-ho, Suh, Sang-ho, Lee, Yong-bok
Format: Article
Language:English
Subjects:
Control
Dynamical Systems
Electromagnetic forces
Engineering
Fluid dynamics
Hydraulic turbines
Industrial and Production Engineering
Mechanical Engineering
Rotor dynamics
Stability analysis
Turbines
Turbogenerators
Vibration
Vibration analysis
기계공학
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Summary:A Francis turbine which is one of the reaction water turbine types is mainly used in the multipurpose dam. The purpose of this research is to explain the vibration characteristics due to the various causes generated in Francis-turbines generator system. The hydrodynamic force was determined to use the fluid dynamics analysis considering the exciting force that is transmitted to the shaft from the runner part. Besides, in the generator parts electromagnetic forces can have a severe influence on the rotor dynamics in some situations. Because, the hydro turbine-generator system supported by various types of bearing, mechanical vibration analysis is also necessary. Based on a real small-scale Francis-turbine generators parameter, several analysis were performed the stability at the operating speed of the rotor such as natural frequency analysis and forced response analysis. Through this analysis, aside from the mechanical factor, electromagnetic and hydrodynamic factors have also been found to affect vibration.
ISSN:1738-494X
1976-3824
DOI:10.1007/s12206-017-1009-0