Flow dam design for labyrinth seals to promote rotor stability
US7004475B2 · kind B2 · utility
7Cited by
19References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2003 |
| Grant date | Feb 28, 2006 |
| Priority date | — |
| Expiry date | Nov 2, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/442
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for reducing steam swirl in a steam turbine. A plurality of seal segments (14) are circumferentially juxtaposed to form a seal ring (12) encircling the turbine shaft (10), each seal segment (14) supporting a plurality of circumferentially disposed annular seal fins (20) to limit axial steam flow along the shaft (10). A plurality of flow dams (40) are disposed within grooves (42) defined in the plurality of seal fins (20) and seal segments (14) for limiting circumferential steam flow and thereby reducing rotor instability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.