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Bushing retention system for thermal medium cooling delivery tubes in a gas turbine rotor

United States Patent

September 3, 2002
View the Complete Patent at the US Patent & Trademark Office
Bushings are provided in counterbores for wheels and spacers for supporting thermal medium cooling tubes extending axially adjacent the rim of the gas turbine rotor. The retention system includes a retaining ring disposed in a groove adjacent an end face of the bushing and which retaining ring projects radially inwardly to prevent axial movement of the bushing in one direction. The retention ring has a plurality of circumferentially spaced tabs along its inner diameter whereby the ring is supported by the lands of the tube maintaining its bushing retention function, notwithstanding operation in high centrifugal fields and rotation of the ring in the groove into other circular orientations.
Mashey; Thomas Charles (Coxsackie, NY)
General Electric Company (Schenectady, NY)
09/ 617,508
July 14, 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.