TURBINE BLADE RETENTION CONFIGURATION

A blade retention arrangement is disclosed for retaining a blade within a disk or wheel within a turbine. The blade retention arrangement includes a dovetail connected with the blade for insertion within a dovetail slot formed in a circumference of the disk or wheel. A first chamfer is formed on an...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Narcus Andrew, Streb Karl, Evans Charles, DiCristoforo Paul
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING ENGINE PLANTS IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES NON-POSITIVE DISPLACEMENT PUMPS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A blade retention arrangement is disclosed for retaining a blade within a disk or wheel within a turbine. The blade retention arrangement includes a dovetail connected with the blade for insertion within a dovetail slot formed in a circumference of the disk or wheel. A first chamfer is formed on an axially front bottom edge of the dovetail and a first deformation of a axially front surface of the wheel presses against the first chamfer whereby a first radially outward force is exerted on the dovetail with respect to an axis of the wheel that presses the dovetail against a first centrifugal retention surface of the dovetail slot. A second chamfer may be formed on an axially back bottom edge of the dovetail that performs in the same manner. The first and second chambers may be formed on respective ones of a forward and aft spacer, or on a bottom spacer instead of being formed on the blade dovetail directly.