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US 6,168,382 AGranted
Turbine rotor wheel with forged replacement dovetail and method of repair
AssigneeGeneral Electric Company
InventorsJohn Francis Nolan, Thomas Gene Gustafson
Life of this patent
Estimating the term…
Abstract
A repaired turbine rotor wheel includes a rotor wheel body having an outer rim. A forged ring is disposed about the outer rim and welded to the wheel body. A dovetail is formed in the ring, the arcuate weld between the ring and the wheel body being located radially inwardly of the dovetail.
Claims8
A repaired turbine rotor wheel comprising:
- a rotor wheel body having an outer rim;
- a replaced dovetail ring disposed about said outer rim;
- an arcuate weld between said ring and said rim for securing said ring and said wheel body to one another;
- and
- a dovetail formed on said ring and opening radially outwardly thereof for receiving the dovetails of rotor buckets, said weld lying radially inwardly of said dovetail;
- said wheel body and said ring being formed of identical materials.
3 more elements
A repaired turbine rotor wheel comprising:
- a rotor wheel body having an outer rim;
- a replaced dovetail ring disposed about said outer rim;
- an arcuate weld between said ring and said rim for securing said ring and said wheel body to one another;
- and
- a dovetail formed on said ring and opening radially outwardly thereof for receiving the dovetails of rotor buckets, said weld lying radially inwardly of said dovetail;
- said wheel body and said ring being formed of different materials.
3 more elements
A repaired turbine rotor wheel comprising:
- a rotor wheel body having an outer rim;
- a replaced dovetail ring disposed about said outer rim;
- an arcuate weld between said ring and said rim for securing said ring and said wheel body to one another;
- a dovetail formed on said ring and opening radially outwardly thereof for receiving the dovetails of rotor buckets, said weld lying radially inwardly of said dovetail;
- said ring being comprised of at least a pair of ring sections disposed about said outer rim;
- and
- a butt-weld between a pair of adjoining ends of said ring sections.
4 more elements
A repaired turbine rotor wheel comprising:
- a rotor wheel body having an outer rim;
- a replaced dovetail ring disposed about said outer rim;
- an arcuate weld between said ring and said rim for securing said ring and said wheel body to one another;
- a dovetail formed on said ring and opening radially outwardly thereof for receiving the dovetails of rotor buckets, said weld lying radially inwardly of said dovetail;
- and
- a weld prep comprised of a radial projection formed on one of said rotor wheel rim and an interior surface of said ring.
3 more elements
A repaired turbine rotor wheel comprising:
- a rotor wheel body having an outer rim;
- a replaced dovetail ring disposed about said outer rim;
- an arcuate weld between said ring and said rim for securing said ring and said wheel body to one another;
- a dovetail formed on said ring and opening radially outwardly thereof for receiving the dovetails of rotor buckets, said weld lying radially inwardly of said dovetail;
- and
- a weld prep comprising a pair of radial projections formed on said rotor wheel rim and an interior surface of said ring, respectively.
3 more elements
A method of repairing a turbine rotor dovetail comprising the steps of:
- removing a damaged dovetail from a turbine rotor wheel by removing an outer annular section of said wheel containing said dovetail, leaving a rotor wheel body having a rim;
- welding a ring comprised of at least one arcuate integral ring section onto said rim;
- and
- forming a dovetail in said arcuate ring for receiving dovetails of rotor wheel buckets;
- said ring including at least a pair of ring sections disposed about said outer rim and butt-welding adjoining ends of said sections to one another.
2 more elements
Dependencies are inferred from the claim text.