A welded nozzle assembly for a steam turbine and methods of assembly

A steam turbine nozzle singlet (40) having a blade or airfoil (42) between inner and outer sidewalls (44, 46) is provided. The sidewalls include steps or flanges (56, 58) which are received in complementary recesses in the rings enabling axially short low heat input welds e.g., e-beam welds. These c...

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Bibliographische Detailangaben
Hauptverfasser:	CRALL, THOMAS WILLIAM, BURDGICK, STEVEN SEBASTIAN, RUSSO, THOMAS PATRICK
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING ENGINE PLANTS IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A steam turbine nozzle singlet (40) having a blade or airfoil (42) between inner and outer sidewalls (44, 46) is provided. The sidewalls include steps or flanges (56, 58) which are received in complementary recesses in the rings enabling axially short low heat input welds e.g., e-beam welds. These complementary steps and recesses mechanically interlock the singlet between the rings preventing displacement of the singlet in the event of weld failure. The low heat input welds minimize or eliminate distortion of the nozzle flow path. Additional features on the singlets, provide a datum for milling machines to form singlets of different sizes.