DocumentCode
338895
Title
Ontario Hydro experience with generator rotor forging cracks at the winding slot tooth roots
Author
Klempner, G.
Author_Institution
Ontario Hydro, Toronto, Ont., Canada
fYear
1999
fDate
36281
Firstpage
299
Lastpage
304
Abstract
This paper describes the experience of Ontario Hydro with rotor forging cracks in the winding slot tooth roots of several of its 500 MW generators. A summary is provided regarding; how the cracks were discovered, crack similarities between rotors, crack initiation and propagation theories, crack growth rate estimates, limiting factors, NDE techniques developed to find and size existing cracks, vibration monitoring for crack propagation, and the final results of the crack investigations
Keywords
crack detection; electric generators; forging; machine testing; nondestructive testing; rotors; vibration measurement; 500 MW; NDE techniques; Ontario Hydro; crack growth rate estimates; crack initiation; crack propagation theories; crack similarities; cracks discovery; cracks sizing; generator rotor forging cracks; limiting factors; nondestructive evaluation; rotors; vibration monitoring; winding slot tooth roots; Electric breakdown; Heating; Insulation; Machine windings; Monitoring; Nose; Rotors; Stator cores; Stress; Teeth;
fLanguage
English
Publisher
ieee
Conference_Titel
Electric Machines and Drives, 1999. International Conference IEMD '99
Conference_Location
Seattle, WA
Print_ISBN
0-7803-5293-9
Type
conf
DOI
10.1109/IEMDC.1999.769097
Filename
769097
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