초록 ▼

A stator structure 34 for supporting an outer air seal 46 is disclosed. Various construction details which adapt the stator structure to evenly move inward and outward in response to the impingement of cooling air are developed. In one embodiment an upstream support ring and a downstream support rin

A stator structure 34 for supporting an outer air seal 46 is disclosed. Various construction details which adapt the stator structure to evenly move inward and outward in response to the impingement of cooling air are developed. In one embodiment an upstream support ring and a downstream support ring for the outer air seal are attached together.

대표청구항 ▼

In an axial flow gas turbine engine of the type having an axis of rotation A, an annular flow path for working medium gases, a coolable outer case which extends circumferentially about the working medium flow path and a turbine section through which the working medium gases are passed, the turbine s

In an axial flow gas turbine engine of the type having an axis of rotation A, an annular flow path for working medium gases, a coolable outer case which extends circumferentially about the working medium flow path and a turbine section through which the working medium gases are passed, the turbine section including an array of rotor blades extending outwardly across the working medium flow path, each rotor blade terminating in an axially oriented tip, and an outer air seal formed of an array of arcuate seal segments which extend circumferentially about the flow path and which are spaced radially from the tips of the rotor blades leaving a gap G therebetween, the improvement which comprises: a stator structure for radially supporting and positioning the array of outer air seal segments which includes an upstream support ring formed of a plurality of upstream support segments which engage the segments of the outer air seal, which are circumferentially slideable with respect to the outer air seal and which extend from the outer air seal to the outer case; a downstream support ring formed of a plurality of downstream support segments which engage the outer air seal, which are circumferentially slideable with respect to the outer air seal and which extend from the outer air seal to the outer case; means for attaching the plurality of upstream support segments and the plurality of downstream support segments to the outer case at one axial location; a single coolable rail integral with the outer case which extends circumferentially about the exterior of the outer case at a location which is axially adjacent to said one axial location, means for impinging cooling air on the coolable rail; wherein movement of the coolable rail in response to cooling air impinged on the coolable rail uniformly adjusts the radial gap G between the outer air seal and the axially extending tips of the array of rotor blades by causing the upstream and downstream support rings of the outer air seal to move together by the same radial amount.