Grooved visco seal for stationary discharge chamber of water-cooled turbine generator
US4114059A · kind A · utility
19Cited by
6References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1976 |
| Grant date | Sep 12, 1978 |
| Priority date | — |
| Expiry date | Sep 3, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/929
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A discharge chamber seal arrangement for a water cooled turbine generator rotor. The discharge chamber seal arrangement comprises a gland seal operable during high speed operation of the rotor and a contact seal operable during low rotor speed and at standstill. Helical grooves located on the inside diameter of the gland seal develops an axial pressure gradient in the fluid annulus surrounding the shaft to reduce the leakage flow at speed through the gland seal. The helical grooves apply a pumping action which opposes the leakage flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.