Turbine shroud sealing apparatus
First Claim
1. A turbine shroud apparatus surrounding a rotor carrying an array of turbine blades for a gas turbine engine having a centerline axis, comprising:
- (a) an annular turbine case;
(b) an annular turbine shroud fixedly mounted within and directly abutting the turbine case, comprising a plurality of arcuate shroud segments, each shroud segment comprising a low-ductility material and configured as a hollow box having opposed forward and aft walls, and opposed inner and outer walls, each of the walls extending between opposite end faces, wherein the inner wall of each shroud segment defines an arcuate flowpath surface exposed to and closely surrounding the turbine blades, to thereby define an outer radial flowpath boundary for a hot gas stream flowing through the rotor, and wherein the shroud segments are disposed with mating end faces in close proximity so as to define end gaps between each facing pair of end faces; and
(c) a seal assembly disposed in each of the end gaps, the seal assembly comprising one or more spline seals which are arranged to define a continuous sealing surface around the perimeters of the mating end faces.
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Accused Products
Abstract
A turbine shroud sealing apparatus for a gas turbine engine includes: (a) an arcuate shroud segment comprising a low-ductility material and having a cross-sectional shape defined by opposed forward and aft walls, and opposed inner and outer walls, the walls extending between opposed first and second end faces of the segment; and (b) a first seal assembly received in at least one slot formed in the first end face, the first seal assembly comprising one or more spline seals which protrude from the first end face and which are arranged to define a continuous sealing surface around the perimeter of the first end face.
102 Citations
6 Claims
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1. A turbine shroud apparatus surrounding a rotor carrying an array of turbine blades for a gas turbine engine having a centerline axis, comprising:
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(a) an annular turbine case; (b) an annular turbine shroud fixedly mounted within and directly abutting the turbine case, comprising a plurality of arcuate shroud segments, each shroud segment comprising a low-ductility material and configured as a hollow box having opposed forward and aft walls, and opposed inner and outer walls, each of the walls extending between opposite end faces, wherein the inner wall of each shroud segment defines an arcuate flowpath surface exposed to and closely surrounding the turbine blades, to thereby define an outer radial flowpath boundary for a hot gas stream flowing through the rotor, and wherein the shroud segments are disposed with mating end faces in close proximity so as to define end gaps between each facing pair of end faces; and (c) a seal assembly disposed in each of the end gaps, the seal assembly comprising one or more spline seals which are arranged to define a continuous sealing surface around the perimeters of the mating end faces. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification