Patent ID: 7334980
Filing Date: 2008-02-26
Classification: F01D,Y02T

Abstract:
1. A split retaining ring for preventing axial movement of a series of locking key segments for securing the outer air seal assembly of a turbine rotor stage to the turbine casing when the keys are in a locking position, said split ring retainer including: an annular body that is slidably contained within a radially disposed groove in the turbine casing, said annular body having a split therein whereby the body can be flexed radially in an outward direction within said groove, said body being arranged to engage a series of locking key segments to prevent axial movement of said key segments; a series of circumferentially spaced raised lugs located upon the inside wall of said annular body, said lugs having inner surfaces that approximates a circle having a first diameter; and said lugs being adapted to mount upon a series of circumferentially spaced seats, said seats having outer surfaces that approximate a circle having a second diameter that is greater than said first diameter whereby the retaining ring is flexed outwardly in a radial direction when mounted upon said seats.