Removable inner turbine shell and bucket tip clearance control

Details Removable inner turbine shell and bucket tip clearance control Removable inner turbine shell and bucket tip clearance control

1999-04-19

2000-06-27

Kwon, John

Rotary kinetic fluid motors or pumps

With passage in blade, vane, shaft or rotary distributor...

415116, F04D 2938

Patent

active

060799439

ABSTRACT:
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.

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