Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2006-10-17
2006-10-17
Schuberg, Darren (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S261100, C310S262000, C310S271000, C310S215000, C029S598000
Reexamination Certificate
active
07122931
ABSTRACT:
An improved generator rotor (30) and a method of repairing an existing generator rotor (12) are disclosed. Methods consistent with the present invention provide techniques for repairing existing stress-damaged rotors (12) to remove stress-induced cracks (29), without requiring new retaining rings (16), to significantly extend the useful life of a generator without the cost and complexity of conventional repair techniques. Improved generator rotors (30) consistent with the present invention provide a tooth-top design that is more resistant to stress-induced cracking than conventional designs, resulting in new generators with longer useful lives.
REFERENCES:
patent: 5174011 (1992-12-01), Weigelt
patent: 5528097 (1996-06-01), Gardner et al.
patent: 5861698 (1999-01-01), Murphy
patent: 5883456 (1999-03-01), Gardner et al.
patent: 6124661 (2000-09-01), Gardner
patent: 6941639 (2005-09-01), Zhang et al.
patent: 0298273 (1989-01-01), None
patent: 0656681 (1995-06-01), None
Gardner W C, “Generator Rotor Long Ring Modifications Without Rewinds”, Proceedings of the 57th American Power Conference, vol. 2, 1995, pp. 1000-1004, XP001155376, Chicago, USA.
Gardner William Cannon
Light Kevin
Whitener Randy Edward
Zhang Jiping
Scheuermann David W.
Schuberg Darren
Siemens Power Generation, Inc.
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