Turbine blade construction

Details Turbine blade construction Turbine blade construction

1998-06-22

1999-09-14

Lopez, F. Daniel

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Coating, specific composition or characteristic

416 97R, F01D 514

Patent

active

059512563

ABSTRACT:
The internally air cooled turbine cast blade is molded with a ceramic core for defining the interior cavity with coolant passages where the ceramic core is configured to fair radially inwardly at the attachment portion of the blade until they form a single wall, parallel to and centered in the blade attachment. The blade is cast in the mold by pouring molten metal into the mold, curing and the core is leached once the metal is cured and the mold removed. Another embodiment includes a metering plate attached to the root of the blade for metering coolant to provide a coolant to gas flow ratio at the film cooling holes.

REFERENCES:
patent: 2972805 (1961-02-01), Hignett et al.
patent: 4236870 (1980-12-01), Hucul, Jr. et al.
patent: 4500258 (1985-02-01), Dodd et al.

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