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Cooling system for a gas turbine

United States Patent

January 14, 2003
View the Complete Patent at the US Patent & Trademark Office
A plurality of arcuate circumferentially spaced supply and return manifold segments are arranged on the rim of a rotor for respectively receiving and distributing cooling steam through exit ports for distribution to first and second-stage buckets and receiving spent cooling steam from the first and second-stage buckets through inlet ports for transmission to axially extending return passages. Each of the supply and return manifold segments has a retention system for precluding substantial axial, radial and circumferential displacement relative to the rotor. The segments also include guide vanes for minimizing pressure losses in the supply and return of the cooling steam. The segments lie substantially equal distances from the centerline of the rotor and crossover tubes extend through each of the segments for communicating steam between the axially adjacent buckets of the first and second stages, respectively.
Wilson; Ian David (Mauldin, SC), Salamah; Samir Armando (Niskayuna, NY), Bylina; Noel Jacob (Niskayuna, NY)
General Electric Company (Schenectady, NY)
09/ 984,826
October 31, 2001
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.