Turbine shroud segment feather seal located in radial shroud legs
First Claim
1. A turbine shroud assembly of a gas turbine engine comprising a plurality of shroud segments disposed circumferentially one adjacent to another, an annular support structure supporting the shroud segments together within an engine casing, and seals provided between adjacent shroud segments, each of the shroud segments including a platform collectively with platforms of adjacent shroud segments forming a shroud ring, and also including front and rear legs integrated with the platform and extending radially and outwardly therefrom for connection with the annular support structure, thereby supporting the platform radially and inwardly spaced apart from the annular support structure to define an annular cavity between the front and rear legs, the seals being disposed between the radial legs of adjacent shroud segments while radial air passages are defined substantially by clearances between mating side surfaces of adjacent platforms to permit cooling of substantially an entire axial length of sides of the platforms of the respective shroud segments.
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Accused Products
Abstract
A turbine shroud assembly is configured to adequately adjust a distribution of cooling air flow such that air leakage between radial shroud legs of adjacent shroud segments is minimized, while permitting cooling air to leak between platforms of adjacent shroud segments in order to cool sides of the platforms thereof.
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Citations
17 Claims
- 1. A turbine shroud assembly of a gas turbine engine comprising a plurality of shroud segments disposed circumferentially one adjacent to another, an annular support structure supporting the shroud segments together within an engine casing, and seals provided between adjacent shroud segments, each of the shroud segments including a platform collectively with platforms of adjacent shroud segments forming a shroud ring, and also including front and rear legs integrated with the platform and extending radially and outwardly therefrom for connection with the annular support structure, thereby supporting the platform radially and inwardly spaced apart from the annular support structure to define an annular cavity between the front and rear legs, the seals being disposed between the radial legs of adjacent shroud segments while radial air passages are defined substantially by clearances between mating side surfaces of adjacent platforms to permit cooling of substantially an entire axial length of sides of the platforms of the respective shroud segments.
- 6. A cooling arrangement in a turbine shroud assembly of a gas turbine engine, the turbine shroud assembly having a plurality of shroud segments, the shroud segments including platforms disposed circumferentially adjacent one to another collectively to form a shroud ring, and including front and rear legs extending radially from an outer surface of the platforms thereby defining a cavity therebetween, the cooling arrangement comprising a first means for substantially preventing cooling air within the cavity from leakage between the front legs and between the rear legs of adjacent shroud segments and a second means for permitting use of cooling air within the cavity to cool substantially entire axial edges joining an inner surface and respective opposite sides of the platforms of the respective shroud segments.
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12. A method for cooling shroud segments of a turbine shroud assembly of a gas turbine engine, comprising steps of:
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(a) continuously introducing cooling air into a cavity defined axially between radial front legs and radial rear legs of the shroud segments and radially between platforms of the shroud segments and an annular support structure; (b) substantially preventing air leakage between the radial front legs and between the radial rear legs of the shroud segments for maintaining a predetermined pressure of the cooling air within the cavity; and (c) cooling substantially entire axial edges joining an inner surface and respective opposite sides of the platforms by continuously directing the cooling air from the cavity through radial passages between platforms of adjacent shroud segments into a gas path defined by the platforms of the shroud segments. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification