Bucket to wheel dovetail design for turbine rotors

Details Bucket to wheel dovetail design for turbine rotors Bucket to wheel dovetail design for turbine rotors

1994-10-12

1996-02-27

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Specific working member mount

Blade straddles carrier

416217, 416248, F01D 530

Patent

active

054944082

ABSTRACT:
In a steam turbine rotor wheel and bucket dovetail joint construction wherein the wheel dovetail includes three radially aligned hooks each interconnected by a neck having an upper and lower fillet, an improvement includes redesigned fillet radii which, in a first embodiment, include the upper fillet having a radius greater than the lower fillet radius. In certain embodiments, the upper fillet may have a radius twice that of the lower fillet. In other embodiments, the radii in both the upper and lower fillets have been enlarged.

REFERENCES:
patent: 4191509 (1980-03-01), Leonardi
patent: 4692976 (1987-09-01), Andrews
patent: 4824328 (1989-04-01), Pisz et al.
patent: 5147180 (1992-09-01), Johnson
patent: 5160242 (1992-11-01), Brown
patent: 5176500 (1993-01-01), Heinig

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