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Retention sleeve for a thermal medium carrying tube in a gas turbine

United States Patent

February 25, 2003
View the Complete Patent at the US Patent & Trademark Office
Multiple tubes are connected to steam supply and spent cooling steam return manifolds for supplying cooling steam to buckets and returning spent cooling steam from the buckets to the manifolds, respectively. The tubes are prevented from axial movement in one direction by flanges engaging end faces of the spacer between the first and second-stage wheels. Retention sleeves are disposed about cantilevered ends of the tubes. One end of the retention sleeve engages an enlarged flange on the tube, while an opposite end is spaced axially from an end face of the adjoining wheel, forming a gap, enabling thermal expansion of the tubes and limiting axial displacement of the tube in the opposite direction.
Lathrop; Norman Douglas (Ballston Lake, NY), Czachor; Robert Paul (Cincinnati, OH)
General Electric Company (Schenectady, NY)
09/ 618,800
July 18, 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.