PASSIVE CONTROL OF GAS TURBINE CLEARANCES USING CERAMIC MATRIX COMPOSITES INSERTS
First Claim
1. A clearance control ring assembly, comprising:
- a stator component disposed opposite a rotor component within a gas turbine engine;
a clearance control ring being formed of a single structure and extending circumferentially disposed radially outward of at least a portion of said stator component;
said clearance control ring having a coefficient of thermal expansion which is lower than said at least a portion of said stator component; and
wherein said at least a portion of said stator component is limited from thermal expansion and limited from growth from said rotor component.
1 Assignment
0 Petitions
Accused Products
Abstract
A passive clearance control limits thermal expansion between stator components relative to rotor components. A control ring controls clearance in a passive manner and is located on or adjacent to stationary components which thermally expand during engine operation. The control ring is formed of material having low coefficient of thermal expansion such as CMCs (Ceramic Matrix Composites) and therefore limits, inhibits or restrains expansion of the adjacent stator components as temperatures increase. Limiting expansion of the stator component reduces rotor/stator clearances and limits parasitic leakage of fluid along the flowpath through the engine core.
2 Citations
22 Claims
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1. A clearance control ring assembly, comprising:
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a stator component disposed opposite a rotor component within a gas turbine engine; a clearance control ring being formed of a single structure and extending circumferentially disposed radially outward of at least a portion of said stator component; said clearance control ring having a coefficient of thermal expansion which is lower than said at least a portion of said stator component; and wherein said at least a portion of said stator component is limited from thermal expansion and limited from growth from said rotor component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification