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US 11,619,237 B2Granted
Carbon seal assembly
AssigneeRaytheon Technologies Corporation
InventorsPantcho P. Stoyanov, Jonathan F. Zimmitti, Nasr A. Shuaib
Life of this patent
Estimating the term…
Abstract
A seal assembly includes a housing at least partially defining a seal opening and at least partially surrounding a rotatable shaft. A carbon seal is located at least partially in the seal opening and includes a sealing surface. The rotatable shaft includes a radially facing surface that has a carbide based coating and a diamond-like carbon coating in engagement with the sealing surface on the carbon seal.
Claims20
A seal assembly comprising:
- a housing at least partially defining a seal opening and at least partially surrounding a rotatable shaft;
- and
- a carbon seal located at least partially in the seal opening and including a sealing surface wherein the housing forms a circumferential ring and the carbon seal is formed from circumferential segments each including a groove on a radially outer surface with a garter spring located in a corresponding groove of each the circumferential segments;
- wherein the rotatable shaft includes a radially facing surface having a carbide based coating and a diamond-like carbon coating in engagement with the sealing surface on the carbon seal.
1 more element
A seal assembly comprising:
- a housing at least partially defining a seal opening and at least partially surrounding a rotatable shaft;
- a carbon seal located at least partially in the seal opening and including a sealing surface, wherein the rotatable shaft includes a radially facing surface having a carbide based coating and a diamond-like carbon coating in engagement with the sealing surface on the carbon seal;
- and
- a recess in the rotatable shaft for accepting the carbide based coating and the diamond-like carbon coating;
- wherein the carbon seal includes a first axial dimension and the sealing surface includes a second axial dimension less than the first axial dimension, wherein the sealing surface is a radially innermost surface of the carbon seal.
2 more elements
A method of using a seal assembly, the method comprising:
- locating a carbon seal adjacent a rotatable shaft, wherein the carbon seal includes a first axial dimension and a sealing surface in engagement with the rotatable shaft includes a second axial dimension that is less than the first axial dimension, wherein the sealing surface is a radially innermost surface of the carbon seal;
- separating the carbon seal from the rotatable shaft with a carbide based coating and a diamond-like carbon coating;
- and
- generating a lubricant between the carbon seal and the diamond-like carbon coating.
1 more element
Dependencies are inferred from the claim text.