Gland for transferring cooling medium to the rotor of a gas turbine
US5738488A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1996 |
| Grant date | Apr 14, 1998 |
| Priority date | — |
| Expiry date | Nov 12, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2260/2322
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A gas turbine rotor steam gland includes a steam inlet supply scroll for supplying steam through radial slots to an axially extending passage in the rotor for steam cooling of hot gas path component parts. The scroll decreases in diameter in the circumferential direction of cooling medium flow to match its velocity with the surface speed of the rotor. An aft labyrinth seal is provided about the rotor. Forwardly of the scroll, a plurality of labyrinth-type seals are interspersed with extraction ports. The extraction ports, except for the final forwardmost extraction port, are maintained at a pressure below the pressure of the inlet supply steam whereby steam leakage past the seals flows into the extraction ports for removal. The final forward extraction port is maintained at sub-ambient pressure such that final steam leakage past the forward seals and ambient air leakage past the forwardmost seal combine and are extracted from the steam gland.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.