초록 ▼

A turbine shroud includes an annular outer casing having first and second radial flanges between which are suspended an adjoining annular shroud support and an annular shroud hanger. A plurality of shroud panels are joined to the shroud hanger and are positionable radially above turbine rotor blades

A turbine shroud includes an annular outer casing having first and second radial flanges between which are suspended an adjoining annular shroud support and an annular shroud hanger. A plurality of shroud panels are joined to the shroud hanger and are positionable radially above turbine rotor blades to define a tip clearance therebetween. The four flanges are disposed in abutting contact with each other, and respective pluralities of circumferentially spaced apart first, second, and third recesses are disposed respectively between the casing first flange and the shroud flange, between the shroud flange and the hanger flange, and between the hanger flange and the casing second flange for providing radial flowpaths therebetween. The support flange and the hanger flange have respective pluralities of circumferentially spaced apart first and second metering holes extending axially therethrough for providing flow communication between the first, second, and third recesses for channeling compressor bleed air therethrough for controlling the tip clearance.

대표청구항 ▼

A turbine shroud positionable radially above a plurality of turbine rotor blades for controlling tip clearance therebetween comprising: an annular outer casing axially split at a pair of adjacent first and second radial flanges; an annular shroud support having a radial support flange and an integra

A turbine shroud positionable radially above a plurality of turbine rotor blades for controlling tip clearance therebetween comprising: an annular outer casing axially split at a pair of adjacent first and second radial flanges; an annular shroud support having a radial support flange and an integral support leg at a radially inner end thereof; an annular shroud hanger having a radial hanger flange and integral forward and aft hanger legs at a radially inner end thereof, said shroud hanger forward leg being supported on said support shroud forward leg; a plurality of shroud panels joined to said hanger legs and having a radially inner surface positionable radially above said rotor blades to define said tip clearance therebetween; said support flange and said hanger flange being axially positioned between said first and second casing flanges in abutting contact with each other, and said four flanges having a plurality of bolt holes arranged on a common circumferential bolt line, each bolt hole receiving a respective bolt for axially clamping together said four flanges to support said shroud panels from said casing; said four flanges having pluralities of circumferentially spaced apart first, second, and third recesses disposed respectively between said casing first flange and said shroud flange, between said shroud flange and said hanger flange, and between said hanger flange and said casing second flange for providing radial flowpaths therebetween; and said support flange and said hanger flange having respective pluralities of circumferentially spaced apart first and second metering holes extending axially therethrough for providing flow communication between said first, second, and third recesses for channeling compressor bleed air therethrough for controlling said tip clearance.