Pressure balanced annular seal
US7413194B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2005 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | Jan 18, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3292
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
This invention provides a segmented annular seal (10) the sealing leakage gaps between relatively movable components 14,16 between high and low pressure regions in a gas turbine engine, for example for sealing an engine shaft 16. The seal comprises an annular array of circumferentially spaced and radially movable arcuate seal segments (12) which extend in a continuous end to end relationship in annular housing (14) and project radially from the housing for effecting a seal against an engine shaft (16), rotor or the like. The segments (12) are located in a channel (22) in the housing (14) sized such that the segments (12) are able to follow radial movements of the shaft (16). In order to reduce an axial loading on the segments (12) that ends to cause them to seize a pressure balance region (30) vented to the upstream pressure region is formed on the downstream side of the segments (12). A second pressure balance region (42) vented to the downstream pressure region may be formed on the upstream side of the segments (12) to relieve a twisting moment acting on the segments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.