A turbine

A turbine includes a plurality of inner shell sections mounting first and second stage nozzle and shroud portions. The inner shell sections are pinned to an outer containment shell formed of sections to preclude circumferential movement of the inner shell relative to the outer shell and enable therm...

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Bibliographische Detailangaben
Hauptverfasser: ELDRID SACHEVEREL QUENTIN, KELLOCK IAIN ROBERTON, MYERS ALBERT, KUNIJT HANS MILTON, CONEYBEER KYLE ETHAN, SEXTON BRENDAN FRANCIS, JOHNSON DAVID MARTIN
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:A turbine includes a plurality of inner shell sections mounting first and second stage nozzle and shroud portions. The inner shell sections are pinned to an outer containment shell formed of sections to preclude circumferential movement of the inner shell relative to the outer shell and enable thermal expansion and contraction of the inner shell relative to the outer shell. Positive bucket tip clearance control is afforded by passing a thermal medium about the inner shell in heat transfer relation with the shrouds about the first and second stage bucket tips, the thermal medium being provided from a source of heating/cooling fluid independent of the turbine. Access is provided to the rotor and turbine buckets by removing the outer and inner shell sections.