Patent ID: 6443699
Filing Date: 2002-09-03
Classification: F01D,Y02T

Abstract:
A bushing retention system in a gas turbine, comprising:a gas turbine rotor having a plurality of axially aligned wheels and spacers, a plurality of axially aligned openings through said wheels and spacers with one of said wheels and spacers having counterbores in said openings; a plurality of tubes extending through said openings in said wheels and spacers at circumferentially spaced locations about said rotor for flowing a thermal medium; each said counterbore having a radial extending groove thereabout; a bushing in each said counterbore of said one of said wheels and spacers for supporting each said respective tube therein; a retainer ring in each said counterbore groove and projecting radially inwardly sufficiently to prevent movement of each said respective bushing in one axial direction, each ring having a circumferential extent terminating in ends spaced from one another enabling reduction of the outer diameter of said ring to locate each ring in each said respective groove; each said ring having radial inward tabs for engaging each respective tube when each said ring is subject to substantial centrifugal forces upon rotation of the rotor to maintain each ring within each respective groove and prevent axial displacement of the bushing in said one axial direction.