Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2007-07-31
2007-07-31
Tamai, Karl (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S090000, C290S055000, C384S627000
Reexamination Certificate
active
11223419
ABSTRACT:
The invention relates to the vibration damper systems (here, method and apparatus) for active removal of beyond-normal internal vibrations from turbine-generator-sets [T-G-Ss]. The invention relies on dynamic forces generated by at least a pair (when symmetrically placed) of “wings” or by at least one “wing” (when centrally placed), or combination of that, and associated hardware mounted on the bearing housing, which operate to offset internally produced vibrations in an active or “real time” fashion. This is in contrast to the typical method of taking the turbine-generator off-line, shutting it down and then eliminating the source of vibration. The invention allows the generator to remain operational during adjustments. Thus, it remains on-line producing electricity and associated revenue. The system may be installed at presently operating T-G-Ss. It also foresees the simple developments to be done in future designed T-G-Ss for use of this method. The use of invention provides a real solution to internal vibrations that develop in turbine-generator-sets throughout their lifetime. This method can also be utilized by other or materially different processes in all kind of machinery, apparatuses and technologies for as long it successfully damps vibrations.
REFERENCES:
patent: 1855570 (1932-04-01), Edison
patent: 4150588 (1979-04-01), Brewer
patent: 4352178 (1982-09-01), Kitamura et al.
patent: 4935651 (1990-06-01), Hong et al.
patent: 7026736 (2006-04-01), Safonov
patent: 2005/0116552 (2005-06-01), Safonov
patent: 2006/0091741 (2006-05-01), Safonov
“Vibration Control for a 25 MW Steam Turbine Generator Installation Near Academic Teaching and Research Laboratories”, Jack Evans, Twelfth International Congress on Sound and Vibration, Jul. 2005.
Gugliotta John D.
Tamai Karl
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