US 5,562,408 AGranted

Isolated turbine shroud

AssigneeGeneral Electric Company

InventorsRobert Proctor, David R. Linger, David A. Di Salle, Steven R. Brassfield, Larry W. Plemmons

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Abstract

A turbine shroud includes an annular shroud support joined to an annular outer casing and spaced radially inwardly therefrom to define an annular flow duct for receiving compressor bleed air. A plurality of shroud panels are joined to the shroud support and have a radially inner surface positionable radially above turbine rotor blades to define a tip clearance therebetween. An isolation shield is joined to the shroud support radially above the panels and includes a plurality of open-ended cells facing radially outwardly in the duct toward the outer casing for inducing drag in the bleed air flowable axially through the duct to thermally isolate the shroud support from the bleed air for controlling the tip clearance.

Claims10

Dependent claims

A turbine shroud positionable radially above a plurality of turbine rotor blades for controlling tip clearance therebetween comprising:

an annular outer casing;
an annular shroud support fixedly joined to said casing and spaced radially inwardly therefrom to define an annular flow duct for receiving compressor bleed air;
a plurality of shroud panels joined to said shroud support and having a radially inner surface positionable radially above said rotor blades to define said tip clearance therebetween;
and
an isolation shield fixedly joined to said shroud support radially above said shroud panels, and including a plurality of open-ended cells facing radially outwardly in said duct toward said outer casing for inducing drag in said bleed air flowable axially through said duct to thermally isolate said shroud support from said bleed air for controlling said tip clearance.

2 more elements

Dependencies are inferred from the claim text.