Turbomachinery blade retaining assembly
AssigneeGeneral Electric Company
InventorsRaymond W. Bucy, Jr., Vicente C. Gallardo, Jr., Ronald C. Hollett, Eric A. Young
Life of this patent
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Abstract
An improved turbomachinery blade retaining assembly for locking the dovetail of a radially extending blade and a spring spacer means into a dovetail slot on a rotor includes axial retention means disposed within radially extending aligned slots within the rotor blade dovetail, the spring spacer means and the dovetail slot. Radial retention means disposed between the radial interior of the blade dovetail and the dovetail slot extend through one or more slots within the axial retention means to retain the axial retention means in place within the aligned radially extending notches.
Claims10
An improved blade retaining assembly for locking a generally radially extending blade in a turbomachinery rotor, the blade having a dovetail at its radially inward end and the rotor having a dovetail slot extending generally axially across its periphery from one side of the rotor to the other, the blade dovetail being received within the dovetail slot including:
- a first notch extending generally radially along a first lateral side of the blade dovetail;
- a second notch extending generally radially along the other lateral side of the blade dovetail;
- a third notch extending generally radially along a first dovetail slot side wall corresponding to the first blade dovetail lateral side, said third notch being axially aligned with said first notch;
- a fourth notch extending generally radially along the other dovetail slot side wall, said fourth notch being axially aligned with said second notch;
- axial retention means disposed within the aligned notches for axially retaining the blade dovetail in place within the dovetail slot wherein the improvement comprises:
- spring spacer means interposed between the radial interior of the blade dovetail and the dovetail slot for exerting a radially outwardly directed force upon the blade dovetail;
- a fifth notch extending radially along a first lateral side of the spring spacer means, said fifth notch being axially and radially aligned with said first notch;
- a sixth notch extending radially along the other lateral side of the spring spacer means, said sixth notch being axially and radially aligned with said second notch;
- and
- wherein said axial retention means is disposed within the fifth and sixth notches for retaining the spring spacer means in place within the dovetail slot.
An improved blade retaining assembly for locking a generally radially extending blade in a turbomachinery rotor, the blade having a dovetail at its radially inward end and the rotor having a dovetail slot extending generally axially across its periphery from one side of the rotor to the other, the blade dovetail being received within the dovetail slot including:
- a first generally semi-circularly shaped notch extending generally radially along a first lateral side of the blade dovetail;
- a second generally semi-circularly shaped notch extending generally radially along the other lateral side of the blade dovetail;
- a third generally semi-circularly shaped notch extending generally radially along a first dovetail slot side wall corresponding to the first blade dovetail lateral side, said third notch being axially aligned with said first notch;
- a fourth generally semi-circularly shaped notch extending generally radially along the other dovetail slot side wall, said fourth notch being axially aligned with said second notch;
- wherein the improvement comprises:
- spring spacer means interposed between the radial interior of the blade dovetail and the dovetail slot for exerting a radially outwardly directed force upon the blade dovetail, said spring spacer means including:
- a fifth generally semi-circularly shaped notch extending generally radially along a first lateral side thereof, said fifth notch being axially and radially aligned with said first notch;
- and
- a sixth generally semi-circularly shaped notch extending generally radially along the other lateral side thereof, said sixth notch being axially and radially aligned with said second notch;
- a pair of generally cylindrical pins a first of said pins being disposed within the first, third, and fifth aligned notches and the other pin being disposed within the second, fourth and sixth aligned notches, said pins each including a notch extending generally axially therethrough, said pins being oriented so that said pin notches face each other;
- and
- radial retention means disposed between the radial interior of the blade dovetail and the spring spacer means and extending through said pin notches for axially retaining the pins in place within their respective aligned notches.
Dependencies are inferred from the claim text.