Marvin Luther Neeley

US Patent:

6857853, Feb 22, 2005

Filed:

Aug 13, 2003

Appl. No.:

10/639473

Inventors:

Steven Eric Tomberg - Simpsonville SC, US
Marvin Luther Neeley - Mauldin SC, US

Assignee:

General Electric Company - Schenectady NY

International Classification:

F01D005/22

US Classification:

416192, 416223 A, 416248, 415914

Abstract:

A turbine bucket airfoil has a conical fillet about the intersection of the airfoil tip and tip shroud having a nominal profile in accordance with coordinate values of X and Y, offset , offset and Rho set forth in Table I. The shape parameters of offset , offset and Rho define the configuration of the fillet at the specified X and Y locations about the fillet to provide a fillet configuration accommodating high localized stresses. The fillet shape may be parabolic, elliptical or hyperbolic as a function of the value of the shape parameter ratio of at each X, Y location where Dl is a distance between an intermediate point along a chord between edge points determined by offsets Oand Oand a shoulder point on the fillet surface and D2 is a distance between the shoulder point and an apex location at the intersection of the airfoil tip and tip shroud.

US Patent:

6722852, Apr 20, 2004

Filed:

Nov 22, 2002

Appl. No.:

10/301703

Inventors:

Raymond Allan Wedlake - Greenville SC
David Alan Meier - Simpsonville SC
Devin Martin - Piedmont SC
Marvin Neeley - Mauldin SC

Assignee:

General Electric Company - Schenectady NY

International Classification:

F01D 514

US Classification:

416223A, 416DIG 2

Abstract:

Third stage turbine buckets have airfoil profiles substantially in accordance with Cartesian coordinate values of X, Y and Z set forth Table I wherein X and Y values are in inches and the Z values are non-dimensional values from 0 to 1 convertible to Z distances in inches by multiplying the Z values by the height of the airfoil in inches. The X, Y and Z distances may be scalable as a function of the same constant or number to provide a scaled up or scaled down airfoil section for the bucket. The nominal airfoil given by the X, Y and Z distances lies within an envelop of Â0. 160 inches in directions normal to the surface of the airfoil.