Patent ID: 9145784
Filing Date: 2015-09-29
Classification: F01D,F05D

Abstract:
1. An annulus filler system for bridging the gap between two adjacent blades attached to a rim of the rotor disc of a gas turbine engine, the system including: an annulus filler having a lid which extends between the adjacent blades and defines an airflow surface for air being drawn through the engine, and a support body extending beneath the lid and terminating in an elongate foot which, in use, extends along a groove provided in the rim of the disc, the groove having a neck which prevents withdrawal of the foot through the neck in a radially outward direction of the disc; and a sleeve which, after installation of the filler, is slidably locatable into a gap between the foot and sides of the groove, wherein the sleeve has one or more frangible zones located within the groove and contacting both the neck and the foot of the annulus filler, the frangible zone provides permanent deformation to allow a rocking movement of the filler about the foot in response to lateral movement of the adjacent blades which is at least of a magnitude to cause the adjacent blades to contact each other, the sleeve having a pair of first and second sidewalls, each of the first and second sidewalls extending between a stop and a respective sidewall free edge, at least one of the frangible zones being located along the first sidewall between the stop and the sidewall free edge of the first sidewall.