Bucket to wheel dovetail design for turbine rotors
AssigneeGeneral Electric Company
InventorsRobert E. Seeley, Raymond J. Jones, Carl L. De Cesare, James H. Vogan, Joseph H. Stocks, III, Carlos E. Silva
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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.
Claims10
In a steam turbine rotor wheel and bucket dovetail joint construction wherein the rotor wheel is formed with a circumferential male dovetail component and wherein a female bucket dovetail is received on the male dovetail component of the wheel in a direction tangent to the wheel, and wherein the wheel dovetail includes three radially aligned hooks each interconnected by a neck having an upper fillet and a lower fillet, the improvement comprising the upper fillet having a radius greater than that of the lower fillet.
In a steam turbine rotor wheel and bucket dovetail joint construction wherein the rotor wheel is formed with a circumferential male dovetail component and wherein a female bucket dovetail is received on the male dovetail component of the wheel in a direction tangent to the wheel, and wherein the wheel dovetail includes three radially aligned hooks each interconnected by a neck having an upper fillet and a lower fillet, the improvement comprising each upper fillet having a radius substantially twice that of the lower fillet.
In a steam turbine rotor wheel and bucket dovetail joint construction wherein the rotor wheel is formed with a circumferential male dovetail component and wherein a female bucket dovetail is received on the male dovetail component of the wheel in a direction tangent to the wheel, .and wherein the wheel dovetail includes three radially aligned hooks each interconnected by a neck having an upper fillet and a lower fillet, the improvement wherein the upper and lower fillets have radii of about 0.125 in.
Dependencies are inferred from the claim text.