Shaft sealing device, rotating machine, and method for manufacturing shaft sealing device
US-10519791-B2 · Dec 31, 2019 · US
Carbon seal assembly
US12291970B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12291970-B2 |
| Application number | US-202318335462-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 15, 2023 |
| Priority date | Feb 14, 2020 |
| Publication date | May 6, 2025 |
| Grant date | May 6, 2025 |
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- Title
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- Abstract
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Abstract
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A seal assembly includes a carbon seal that has a sealing surface. A seal seat has a sealing surface and is positioned for rotation relative to the carbon seal. A diamond-like carbon coating at least partially forms the sealing surface on the seal seat.
First claim
Opening claim text (preview).
What is claimed is: 1. A gas turbine comprising: a compressor section including at least one compressor rotor, and a turbine section including at least one turbine rotor, with a shaft connecting said at least one turbine rotor to said at least one compressor rotor and there being a bearing compartment including at least one bearing for supporting said at least one shaft; a seal assembly for sealing an axially upstream end of said bearing compartment and an axially downstream end of said bearing compartment, each of said upstream end sealed by an upstream seal having a carbon seal with a sealing surface and a seal seat having a seal surface fixed to said at least one shaft for rotation relative to the carbon seal, and a diamond-like carbon coating at least partially forming the sealing surface on the seal seat; and wherein the diamond-like carbon coating includes a sp2 content that is greater than a sp3 content. 2. The gas turbine engine of claim 1 , wherein the seal seat is comprised of at least one of a ceramic matric composite, a silicon nitride, or a silicon carbide. 3. The gas turbine engine of claim 2 , wherein the diamond-like carbon coating is in direct contact with the seal seat.
Assignees
Inventors
Classifications
with sealing rings made of carbon · CPC title
Special parts or details relating to lubrication or cooling of the sealing itself (F16J15/324, F16J15/3404, F16J15/40 take precedence) · CPC title
Coating · CPC title
Carbon, e.g. graphite · CPC title
Seals · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US12291970B2 cover?
- A seal assembly includes a carbon seal that has a sealing surface. A seal seat has a sealing surface and is positioned for rotation relative to the carbon seal. A diamond-like carbon coating at least partially forms the sealing surface on the seal seat.
- Who is the assignee on this patent?
- Rtx Corp
- What technology area does this patent fall under?
- Primary CPC classification F01D11/003. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue May 06 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).