Geothermal turbine

Details Geothermal turbine Geothermal turbine

2007-01-23

2007-01-23

Edgar, Richard A. (Department: 3745)

Fluid reaction surfaces (i.e., impellers)

Rotor having flow confining or deflecting web, shroud or...

Axially extending shroud ring or casing

C416S19600R

Reexamination Certificate

active

10928212

ABSTRACT:
A geothermal turbine comprises a turbine casing, a turbine rotor shaft, a plurality of nozzle diaphragm outer rings fixed to the turbine casing, a plurality of nozzle diaphragm inner rings located radially inside the nozzle diaphragm outer rings, a plurality of nozzles placed between the nozzle diaphragm outer rings and the nozzle diaphragm inner rings, which form a steam passage, a plurality of rotor blades mounted on the turbine rotor shaft, which face the nozzles and form a blade cascade in a circumferential direction, a shroud arranged on tip of the rotor blade, an overhang attached to the nozzle diaphragm outer ring, which extends downstream of the nozzles and has an inner surface facing radially outside the shroud, and a plurality of sealing fins which protrude radially outward from the shroud and face the overhang.

REFERENCES:
patent: 3302925 (1967-02-01), Musick
patent: 3837761 (1974-09-01), Brown
patent: 3897169 (1975-07-01), Fowler
patent: 5445498 (1995-08-01), Williams et al.
patent: 5683226 (1997-11-01), Clark et al.
patent: 61-14402 (1986-01-01), None
patent: 7-278780 (1994-10-01), None

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