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US 12,292,116 B2Granted
Carbon seal assembly
AssigneeRtx Corporation
InventorsPantcho P. Stoyanov, Jonathan F. Zimmitti, Nasr A. Shuaib
Life of this patent
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Abstract
A seal assembly includes a housing that includes a seal flange at least partially defining a seal opening. A carbon seal is located at least partially in the seal opening and includes a first axially facing surface. The seal flange includes an axially facing surface that has a carbide based coating and a diamond-like carbon coating in engagement with the first axially facing surface on the carbon seal.
Claims18
A seal assembly comprising:
- a housing including a seal flange at least partially defining a seal opening;
- and
- a carbon seal located at least partially in the seal opening and including a first axially facing surface;
- the seal flange includes an axially facing surface having a carbide based coating and a diamond-like carbon coating in engagement with the first axially facing surface on the carbon seal;
- the carbide based coating is formed on the seal flange;
- wherein the diamond-like carbon coating covers the carbide based coating at a coating interface and the carbon seal and the diamond-like carbon coating are spaced from the seal flange by the carbide based coating;
- wherein the carbide based coating includes at least one of a tungsten carbide-cobalt or a chromium carbide;
- and
- wherein a recess is formed at a radially outer surface of the carbon seal and a spring is received within the recess to bias the carbon seal radially inwardly.
6 more elements
A gas turbine engine comprising:
- a fan section, a compressor section and a turbine section, each of the fan section, compressor section and turbine section including rotating components each having a rotating shaft;
- at least one of the rotating shafts being associated with a seal assembly;
- the seal assembly having a housing including a seal flange at least partially defining a seal opening, a carbon seal located at least partially in the seal opening and including a first axially facing surface, the seal flange includes an axially facing surface having a carbide based coating and a diamond-like carbon coating in engagement with the first axially facing surface on the carbon seal, the carbide based coating is formed on the seal flange, the diamond-like carbon coating covers the carbide based coating at a coating interface;
- the carbon seal and the diamond-like carbon coating is spaced from the seal flange by the carbide based coating;
- and
- the carbide based coating includes at least one of a tungsten carbide-cobalt or a chromium carbide.
3 more elements
Dependencies are inferred from the claim text.