Ronald Lee Mcrae

US Patent:

20040170496, Sep 2, 2004

Filed:

Feb 27, 2003

Appl. No.:

10/375441

Inventors:

Andrew Powis - Maderia OH, US
Ronald McRae - Cincinnati OH, US
Jonathan Clarke - West Chester OH, US
Jonathan Peterman - West Chester OH, US
Robert Frederick - West Chester OH, US
Edward Gibler - West Chester OH, US
Brian Keith - Cincinnati OH, US

International Classification:

F01D001/02

US Classification:

415/189000

Abstract:

A turbine nozzle segment includes at least one hollow airfoil extending radially between radially outer and inner band segments, a clockwise open hook on a clockwise end at an aft end of the outer band segment, and counter-clockwise open hook on a counter-clockwise end at the aft end of the outer band segments. An exemplary embodiment of the turbine nozzle segment includes a load stop extending radially outwardly from the outer band segment. At least one aftwardly facing load face is at the aft end of the nozzle segment at the outer band segment. The clockwise open hook is C-shaped and the counter-clockwise open hook is a shiplap hook. Another embodiment of the turbine nozzle segment has only one hollow airfoil with an airfoil wall surrounding a bifurcated cavity divided into forward and aft cavities by a bifurcating rib extending between pressure and suction sides of the airfoil wall.

US Patent:

20040170498, Sep 2, 2004

Filed:

Feb 27, 2003

Appl. No.:

10/375415

Inventors:

Jonathan Peterman - West Chester OH, US
Andrew Powis - Maderia OH, US
Ronald McRae - Cincinnati OH, US
Jonathan Clarke - West Chester OH, US
Robert Frederick - West Chester OH, US
Edward Gibler - West Chester OH, US
Brian Keith - Cincinnati OH, US

International Classification:

F01D005/08

US Classification:

416/09700R

Abstract:

A turbine nozzle bifurcated impingement baffle includes axially forward and aft chambers with a gap therebetween, impingement holes through forward and aft baffle walls of the forward and aft chambers respectively, and a plenum chamber in fluid flow communication with the forward and aft chambers. An exemplary embodiment of the bifurcated impingement baffle further includes a single cooling air inlet to the plenum chamber enclosed within a plenum chamber enclosure the plenum chamber. A sealing plate is mounted between and sealed to the plenum chamber enclosure and the forward and aft chambers. The sealing plate has forward and aft inlet apertures disposed between the plenum chamber and the forward and aft chambers respectively. Forward and aft end plates cap radially inner ends of the forward and aft chambers. An outlet aperture in the forward end plate has an interstage seal cavity feed tube disposed therethrough.

US Patent:

20040170499, Sep 2, 2004

Filed:

Feb 27, 2003

Appl. No.:

10/375585

Inventors:

Andrew Powis - Mederia OH, US
Ronald McRae - Cincinnati OH, US
Jonathan Clarke - West Chester OH, US
Jonathan Peterman - West Chester OH, US
Robert Frederick - West Chester OH, US
Edward Gibler - West Chester OH, US
Brian Keith - Cincinnati OH, US

International Classification:

F01D005/08

US Classification:

416/09700R

Abstract:

A turbine nozzle segment includes a single hollow airfoil extending radially between radially outer and inner band segments. The airfoil has an airfoil wall with pressure and suction sides extending axially between leading and trailing edges of the airfoil. The airfoil wall surrounds a bifurcated cavity and a bifurcating rib extends through the bifurcated cavity and between the pressure and suction sides of the airfoil wall dividing the bifurcated cavity into forward and aft cavities. A stiffening rib extends radially outwardly from and along a radially outer surface of the outer band segment and axially and circumferentially from a pressure side forward corner of the outer band segment to the bifurcating rib. The outer and inner band segments, the bifurcating rib, and the stiffening rib are integral and made from a unitary one-piece casting.

US Patent:

20050047906, Mar 3, 2005

Filed:

Sep 2, 2003

Appl. No.:

10/653519

Inventors:

Ronald McRae - Cincinnati OH, US
Sean Keith - Fairfield OH, US
Gulcharan Brainch - West Chester OH, US

International Classification:

F01D005/14

US Classification:

415115000

Abstract:

A method facilitates fabricating a rotor assembly for a gas turbine engine. The method comprises providing a plurality of rotor blades that each include an airfoil, a dovetail, a shank, and a platform, wherein the platform extends between the shank and the airfoil, and wherein the dovetail extends outwardly from the shank, and forming a cooling circuit within a portion of the shank to supply cooling air to the rotor blade for supplying cooling air to the rotor blade for impingement cooling a portion of the rotor blade and for supplying cooling air to the rotor blade for purging a cavity defined downstream from the rotor blade.

US Patent:

20080101959, May 1, 2008

Filed:

Oct 26, 2006

Appl. No.:

11/586952

Inventors:

Ronald Eugene McRae - Cincinnati OH, US
Brian David Keith - Cincinnati OH, US
Andrew Edward Obermeyer - West Chester OH, US
Leslie Eugene Leeke - Burlington KY, US

International Classification:

B64C 27/46

US Classification:

416223 R

Abstract:

An airfoil for a rotor blade including an uncoated profile substantially in accordance with Cartesian coordinate values of X, Y and Z to facilitate balancing performance and durability of the rotor blade and to facilitate improving an operating efficiency of a high-pressure turbine is provided. The profile is carried only to four decimal places, wherein Y represents a distance from a platform on which the airfoil is mounted, and X and Z are coordinates defining the profile at each distance Y from the platform.

US Patent:

20030044279, Mar 6, 2003

Filed:

Oct 18, 2002

Appl. No.:

10/273506

Inventors:

Leslie Leeke - Burlington KY, US
Sean Keith - Fairfield OH, US
Ronald McRae - Wyoming OH, US
Richard Albrecht - Fairfield OH, US
David Frey - West Chester OH, US

Assignee:

General Electric Company

International Classification:

F01D005/08

US Classification:

416/09700R

Abstract:

A hollow cooled turbine airfoil is provided having pressure and suction side walls and a plurality of trailing edge cooling passages that feed cooling air bleed slots at the trailing edge. The suction side wall has a selectively reduced thickness, which allows shortened trailing edge slots, improving trailing edge cooling.

US Patent:

20030044275, Mar 6, 2003

Filed:

Aug 30, 2001

Appl. No.:

09/943526

Inventors:

Leslie Leeke - Burlington KY, US
Sean Keith - Fairfield OH, US
Ronald McRae - Wyoming OH, US
Richard Albrecht - Fairfield OH, US
David Frey - West Chester OH, US

International Classification:

F03D005/06

US Classification:

416/079000

Abstract:

A hollow cooled turbine airfoil is provided having pressure and suction side walls and a plurality of trailing edge cooling passages that feed cooling air bleed slots at the trailing edge. The suction side wall has a selectively reduced thickness, which allows shortened trailing edge slots, improving trailing edge cooling.