Modified bucket platforms of turbine buckets and methods for modifying bucket platforms of turbine buckets

The method for modifying a bucket platform 120 of a turbine bucket 100 includes removing a portion of the bucket platform to form a void 150, wherein the void comprises a predetermined geometry. A filler material (135, Figure 5) is then added in layers (137) to fill the void. The method may be used...

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Bibliographische Detailangaben
Hauptverfasser:	James Ryan Connor, Keith Alan Lord, Robert Trent Hullender
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CLADDING OR PLATING BY SOLDERING OR WELDING COMBINED OPERATIONS CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ENGINE PLANTS IN GENERAL HEATING INDEXING SCHEME FOR ASPECTS RELATING TONON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES ORJET-PROPULSION PLANTS INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04 LIGHTING MACHINE TOOLS MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES OTHER WORKING OF METAL PERFORMING OPERATIONS SOLDERING OR UNSOLDERING STEAM ENGINES SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL TRANSPORTING UNIVERSAL MACHINE TOOLS WEAPONS WELDING WORKING BY LASER BEAM WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OFELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKESTHE PLACE OF A TOOL
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Beschreibung
Zusammenfassung:	The method for modifying a bucket platform 120 of a turbine bucket 100 includes removing a portion of the bucket platform to form a void 150, wherein the void comprises a predetermined geometry. A filler material (135, Figure 5) is then added in layers (137) to fill the void. The method may be used to modify multiple bucket platforms. A modified turbine bucket includes an airfoil 110 extending from a bucket platform, a root portion 140 extending from an opposite side of the bucket platform and filler material disposed in layers that fills a previously formed void 150 comprising a predetermined geometry. The predetermined geometry may include one or more sidewalls having a non-vertical or tapering orientation. The sidewalls may be non-linear. The void may be formed on one or more edges of the bucket platform, may extend from a top surface to a side surface or be formed on a pressure side. Electrical discharge machining may be used to remove the portion.