Back to results
US 11,560,808 B2Granted
Seal assembly for gas turbine engine
AssigneeRaytheon Technologies Corporation
InventorPantcho P. Stoyanov
Life of this patent
Estimating the term…
Abstract
A seal assembly for a gas turbine engine having a seal formed of a carbon material; and a seal seat positioned for rotation relative to the seal, wherein the seal and the seal seat each have a sealing surface which together define a sliding seal, and further having a carbon film on the sealing surface of the seal seat.
Claims11
A seal assembly for a gas turbine engine, comprising:
- a seal comprising a carbon material, wherein the seal comprises an electrographitic grade carbon;
- and
- a seal seat comprising a chromium carbide material, said seal seat being positioned for rotation relative to the seal, wherein the seal and the seal seat each have a sealing surface which together define a sliding seal, and further comprising a carbon film on the sealing surface of the seal seat over the chromium carbide material, wherein the carbon film is doped with a carbide-forming metal.
A method for making a seal assembly, comprising the steps of:
- positioning a seal relative to a seal seat, wherein the seal comprises an electrographitic grade carbon;
- and the seal seat comprises a chromium carbide material, said seal seat is positioned for rotation relative to the seal, wherein the seal and the seal seat each have a sealing surface which together define a sliding seal, and
- depositing a carbon film on the sealing surface of the seal seat over the chromium carbide material, wherein the carbon film is doped with a carbide-forming metal.
Dependencies are inferred from the claim text.