Methods for shielding a welding gas turbine repair of a damaged

Details Methods for shielding a welding gas turbine repair of a damaged Methods for shielding a welding gas turbine repair of a damaged

1998-11-27

2000-04-18

Cuda, Irene

Metal working

Method of mechanical manufacture

Impeller making

292897, 228119, B23P 1500

Patent

active

060499796

ABSTRACT:
The welding method for repairing a turbine rotor dovetail includes removal of buckets from damaged dovetails, removing a damaged dovetail from a turbine wheel, leaving a rotor wheel body having a rim. A plurality of ring sections are disposed about the wheel body rim, leaving axially opening annular grooves along opposite sides of the wheel. Welding apparatus including an electrode, welding wire and gas-carrying tube are inserted into the groove through an axial face of the wheel. One or more cover plates are disposed to overlie the groove at the location of its opening through the axial face of the wheel to at least partially seal the groove at its opening and maintain welding gas in the groove, enveloping the electrode and weld wire.

REFERENCES:
patent: 5704765 (1998-01-01), Amos et al.
patent: 5713233 (1998-02-01), McCarthy et al.
patent: 5898994 (1999-05-01), Miller et al.
patent: 5980204 (1999-11-01), Chevrette

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