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US 7,726,021 B2Granted
Labyrinth seal repair
AssigneePratt & Whitney Canada Corp.
InventorBarry Barnett
Life of this patent
Estimating the term…
Abstract
A method for repairing damaged fins in a labyrinth seal without the use of welding or metallurgical bonding by removing a section of the shaft containing the damaged fins, and providing a sleeve with replacement fins.
Claims6
A method for replacing a fin in a labyrinth seal, the fin having a radially outward runner contact surface and a radially inward base extending from a shaft, the method comprising the steps of:
- removing a section of the labyrinth seal containing the fin, thus forming a recess in a radially outward surface of the shaft;
- providing a sleeve with a radially inward surface and a replacement fin;
- and
- fitting the radially inward surface of the sleeve into the recess in the radially outward surface of the shaft, the sleeve being attached to the shaft by way of an interference fit with the shaft.
1 more element
Dependencies are inferred from the claim text.