Authors: Momčilović, Dejan
Odanović, Zoran
Mitrović, Radivoje
Atanasovska, Ivana 
Vuherer, Tomaž
Title: Failure analysis of hydraulic turbine shaft
Journal: Engineering Failure Analysis
Volume: 20
First page: 54
Last page: 66
Issue Date: 1-Mar-2012
Rank: M22
ISSN: 1350-6307
DOI: 10.1016/j.engfailanal.2011.10.006
Abstract: 
This paper describes the analysis of major failure of 28. MW horizontal hydro turbine shaft. The analysis of load carrying capacity of critical radius and fractography analysis are presented. Special emphasize is on metallurgical failure analysis of in-service crack initiation. The analysis of stresses is obtained by the finite element method and the developed model and load conditions are described. Finite element analysis is performed for case of normal service and start-up regime.Based on the failure analysis and numerical calculations, it could be concluded that the seal box design led to constant flow of river water in zone of critical radius which resulted as occurrence of corrosion fatigue cracks and major failure of turbine shaft. Suggestions for problem solution for the turbine shaft are also presented.
Keywords: Corrosion fatigue | Cracks | Failure analysis | Shafts
Publisher: Elsevier
Project: Development of Methodology for Improvement of Operational Performance, Reliability and Energy Efficiency of Machine Systems used in the Resource Industry 

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