Removable inner turbine shell with bucket tip clearance control

Patent · Tue Jul 04 04:00:00 EDT 2000

OSTI ID:20076124

Sexton, B F; Knuijt, H M; Eldrid, S Q; Myers, A; Coneybeer, K E; Johnson, D M; Kellock, I R

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.

• Sponsoring Organization: US Department of Energy
• DOE Contract Number: FC21-95MC31176
• OSTI ID: 20076124
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CONTRACTION
DESIGN
HEAT TRANSFER FLUIDS
LINERS
THERMAL EXPANSION
TURBINES