Clearance control assembly having a thermally-controlled one-pie

Details Clearance control assembly having a thermally-controlled one-pie Clearance control assembly having a thermally-controlled one-pie

1991-07-03

1992-12-01

Look, Edward K.

Rotary kinetic fluid motors or pumps

Including additional means causing or controlling fluid flow...

415139, F01D 2508, F01D 508

Patent

active

051674882

ABSTRACT:
A clearance control assembly in a gas turbine engine includes several stages of cylindrical turbine shroud rings and a one-piece continuous cylindrical housing surrounding the shroud rings in radially outward spaced relation. Each shroud ring is composed of at least a pair of semi-cylindrical segments mounted to the housing. The shroud ring segments are radially positioned by thermal expansion and contraction of the housing in response to temperature-controlled air flow between the housing and shroud segments. Coupling elements joins together opposite edge portions of adjacent shroud ring segments to permit axial movement of the shroud segments toward and away from one another. Lands which protrude outwardly from the housing interior and shroud ring segment exteriors are located between the housing and shroud segments for defining several spiral channels for air flow about the interior of the housing and exterior of the shroud segments. Conduits are provided for supplying a flow of temperature-controlled air to the spiral channels between the housing and shroud segments.

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