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Steam cooling system for a gas turbine

United States Patent

October 15, 2002
View the Complete Patent at the US Patent & Trademark Office
The steam cooling circuit for a gas turbine includes a bore tube assembly supplying steam to circumferentially spaced radial tubes coupled to supply elbows for transitioning the radial steam flow in an axial direction along steam supply tubes adjacent the rim of the rotor. The supply tubes supply steam to circumferentially spaced manifold segments located on the aft side of the 1-2 spacer for supplying steam to the buckets of the first and second stages. Spent return steam from these buckets flows to a plurality of circumferentially spaced return manifold segments disposed on the forward face of the 1-2 spacer. Crossover tubes couple the steam supply from the steam supply manifold segments through the 1-2 spacer to the buckets of the first stage. Crossover tubes through the 1-2 spacer also return steam from the buckets of the second stage to the return manifold segments. Axially extending return tubes convey spent cooling steam from the return manifold segments to radial tubes via return elbows.
Wilson; Ian David (Mauldin, SC), Barb; Kevin Joseph (Halfmoon, NY), Li; Ming Cheng (Cincinnati, OH), Hyde; Susan Marie (Schenectady, NY), Mashey; Thomas Charles (Coxsackie, NY), Wesorick; Ronald Richard (Albany, NY), Glynn; Christopher Charles (Hamilton, OH), Hemsworth; Martin C. (Cincinnati, OH)
General Electric Company (Schenectady, NY)
09/ 731,982
December 8, 2000
This invention was made with Government support under Contract No. DE-FC21-95MC31176 awarded by the Department of Energy. The Government has certain rights in this invention.