Non-contact seal for a gas turbine engine
US8172232B2 · kind B2 · utility
64Cited by
25References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 4, 2008 |
| Grant date | May 8, 2012 |
| Priority date | — |
| Expiry date | Jun 1, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01D11/025
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A seal comprises the combination of a primary seal and a secondary seal each of which acts on at least one shoe that is installed with clearance relative to one of a rotor and a stator in a position to create a non-contact seal therewith. The at least one shoe is provided with a surface geometry and labyrinth-type teeth that influence the inertia of fluid flowing across the seal, and, hence, the velocity of the fluid and the pressure distribution across the seal, ultimately affecting the balance of forces applied to the seal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.