Control apparatus for gas turbine

Power plants – Combustion products used as motive fluid – For nominal other than power plant output feature

Reexamination Certificate

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Details

C060S795000, C060S039080

Reexamination Certificate

active

07661270

ABSTRACT:
An exhaust-side bearing rotatably supports a rotor of a turbine. A seal air-pipe and a first air-supply pipe supply compressed air extracted from a compressor of the turbine to the exhaust-side bearing. A second air-supply pipe supplies compressed air from a supplementary air-source to the exhaust-side bearing. A control apparatus switches between the first air-supply pipe and the second air-supply pipe based on the operation state of the gas turbine.

REFERENCES:
patent: 4156342 (1979-05-01), Korta et al.
patent: 5134844 (1992-08-01), Lee et al.
patent: 6513335 (2003-02-01), Fukutani
patent: 6622490 (2003-09-01), Ingistov
patent: 6966191 (2005-11-01), Fukutani et al.
patent: 7562519 (2009-07-01), Harris et al.
patent: 7584619 (2009-09-01), Granitz et al.
patent: 2001/0047651 (2001-12-01), Fukutani
patent: 9-60532 (1997-03-01), None
patent: 2005-23812 (2005-01-01), None

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