Rotary kinetic fluid motors or pumps – With lubricating – sealing – packing or bearing means having... – For shaft sealing – packing – lubricating or bearing means
Patent
1996-11-12
1998-04-14
Verdier, Christopher
Rotary kinetic fluid motors or pumps
With lubricating, sealing, packing or bearing means having...
For shaft sealing, packing, lubricating or bearing means
415111, 415113, 415115, 4151682, 4151684, 415180, 415231, F01D 1102, F01D 1104
Patent
active
057384886
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.
REFERENCES:
patent: 2778601 (1957-01-01), Eckert
patent: 2788951 (1957-04-01), Flint
patent: 5120192 (1992-06-01), Ohtomo et al.
patent: 5575617 (1996-11-01), Marmilic et al.
patent: 5599026 (1997-02-01), Sanders et al.
Croft Steven John
Gau San-Dar
Gazzillo Clement
Parent Denise Marie
General Electric Co.
Verdier Christopher
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