Turbine blade and diaphragm

In one aspect, an axial flow turbine blade comprises inner 22, and outer 23 platforms and a corner fillet 24 where the blade aerofoil 21 meets each platform. Each platform comprises a trailing edge 22A, 23A side edges 22B, 22C, 23B, 23C, and a curved leading edge 22D, 23D, that follows the edge of t...

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Bibliographische Detailangaben
Hauptverfasser:	DAVID PAUL BLATCHFORD, DAVID JOHN NELMES, BRYAN VINCENT COLTAR
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING ENGINE PLANTS IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES PERFORMING OPERATIONS PUNCHING METAL STEAM ENGINES TRANSPORTING WEAPONS WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	In one aspect, an axial flow turbine blade comprises inner 22, and outer 23 platforms and a corner fillet 24 where the blade aerofoil 21 meets each platform. Each platform comprises a trailing edge 22A, 23A side edges 22B, 22C, 23B, 23C, and a curved leading edge 22D, 23D, that follows the edge of the corner fillet in the region of the leading edge 26 of the aerofoil. In another aspect, a diaphragm construction comprises an annulus of turbine blades having inner and outer platforms accommodated by apertures in inner and outer spacer rings. The platforms may be welded to the spacer rings by a method involving welding cover plates to the leading and trailing edges of the platforms, machining weld preparation slots, performing a welding process to fill the slots and secure the platforms to the spacer rings, and machining the cover plates to remove them from the diaphragm.