Patent ID: 8702374

Claim:
A gas turbine engine, comprising: a segment of an annular guide vane assembly, comprising: a platform disposed at a side of the segment radially inward with respect to an axis of rotation of the gas turbine engine; and a support and cooling arrangement for supporting the segment and directing a cooling fluid to cool the segment, comprising: a flange part that extends radially inwardly from the support and cooling arrangement, a leaf seal, and a retaining pin, the retaining pin extending through the leaf seal, a rail, and the flange part, wherein when the gas turbine engine is in use, the segment directs hot combustion gases onto a plurality of rotor blades of the engine, wherein the platform includes a trailing edge portion downstream with respect to a flow of hot combustion gases through the segment, wherein the trailing edge portion includes the rail that extends radially inwardly from the trailing edge portion such that the rail abuts the radially inwardly directed face of the platform and is parallel to the final trailing tip of the trailing edge portion, wherein the support and cooling arrangement is located radially inward of the platform, and wherein the retaining pin secures the segment to the support and cooling arrangement to determine the radial position of the segment, and retains the leaf seal in a position to seal an interface between the rail and the flange part against the ingress of cooling fluid, wherein the support and cooling arrangement further includes a carrier ring centered on the axis of rotation of the engine, wherein the flange part comprises main and subsidiary flanges that extend radially outwardly from the carrier ring, wherein the subsidiary flange is of reduced thickness as compared to the main flange so as to create a recessed area that runs around a periphery of the carrier ring, wherein the rail runs along the circumferentially extending recessed area, wherein a first upstream directed face of the rail lies substantially in a same plane as a second upstream directed face of the main flange, and wherein the leaf seal is planar in form and lies against the first and second upstream directed faces and bridges the interface between the rail and the main and subsidiary flanges.