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US 7,029,232 B2Granted
Abradable seals
AssigneeROLLS-ROYCE plc
InventorsMartin Tuffs, Junfa Mei, Xinhua Wu
Life of this patent
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Abstract
A sealing element for a turbine of a gas turbine engine includes a radially inner surface region provided with an integrally formed seal structure comprising a plurality of radially inwardly projecting walls. The walls may be abradable and may define cells for receiving an abradable sealing material.
Claims27
A method of manufacturing a sealing element that can be positioned radially outward from at least some aerofoil blades in a gas turbine engine, the method comprising:
- forming a seal structure having a radially inner surface region;
- forming a plurality of projecting walls at the radially inner surface region by power-fed laser weld deposition;
- wherein:
- the projecting walls are configured on the seal structure to form a plurality of open cells;
- and
- the projecting walls have a thickness of up to about 0.4 mm.
3 more elements
Dependencies are inferred from the claim text.