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US 5,399,065 AGranted
Improvements in cooling and sealing for a gas turbine cascade device
AssigneeHitachi, Ltd.
InventorsTakeshi Kudo, Isao Takehara, Tetsuo Sasada, Shunichi Anzai, Kazuhiko Kawaike
Life of this patent
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Abstract
In a cascade device for a gas turbine, cooling air which has passed through a trailing air cooling chamber of each stationary blade is discharged from a tip of the stationary blade toward a side surface of a base of a moving blade disposed adjacent to the stationary blade. With this arrangement, the cooling of the stationary blade as well as the sealing of a cascade portion is effected satisfactorily with a smaller amount of the air.
Claims4
A cascade device for a gas turbine comprising:
- stationary blades each having a leading air cooling chamber and a trailing air cooling chamber which are provided respectively within a leading edge portion and a trailing edge portion of said stationary blade;
- first means for discharging cooling air, which has passed through said trailing air cooling chamber, from a tip of said stationary blade to a space between the tip of said stationary blade and a base of a moving blade disposed adjacent to said stationary blade;
- and
- means for leading the cooling air to be supplied to said stationary blade directly to said trailing air cooling chamber, wherein said first discharging means discharges the cooling air, which has passed through said trailing air cooling chamber, to a space between the tip of said stationary blade and the base of the moving blade disposed adjacent to a downstream side of said stationary blade;
- and
- second means for discharging cooling air, which has passed through said leading air cooling chamber, to a space between the tip of said stationary blade and a base of a moving blade disposed adjacent to an upstream side of said stationary blade.
3 more elements
A cascade device for a gas turbine comprising:
- stationary blades each having a leading air cooling chamber and a trailing air cooling chamber which are provided respectively within a leading edge portion and a trailing edge portion of said stationary blade;
- and
- means for discharging cooling air, which has passed through said trailing air cooling chamber, from a tip of said stationary blade toward a side surface of a base of a moving blade disposed adjacent to said stationary blade;
- wherein said discharging means comprises an air discharge port which is provided at the tip of said stationary blade, communicates with said trailing air cooling chamber, and extends in a radial direction, and a guide device provided in opposed relation to said air discharge port for guiding the air, discharged from said air discharge port, toward the side surface of the base of the moving blade disposed adjacent to said stationary blade.
1 more element
Dependencies are inferred from the claim text.