Gary Albert Swartzbeck

US Patent:

6638639, Oct 28, 2003

Filed:

Jul 6, 2000

Appl. No.:

09/509621

Inventors:

Michael A. Burke - Pittsburgh PA
Paula D. Freyer - Cranberry Township PA
Mohan A. Hebbar - Oviedo FL
Brij B. Seth - Maitland FL
Gary W. Swartzbeck - North Huntingdon PA
Thomas Walter Zagar - Winter Springs FL

Assignee:

Siemens Westinghouse Power Corporation - Orlando FL

International Classification:

B32B 1500

US Classification:

428583, 428594, 428606, 428680, 416241 R, 416 95

Abstract:

High efficiency, thin-walled turbine components such as turbine blade airfoils comprise a superalloy substrate covered by a thin skin. The thin skin may be bonded to the inner spar structure of a turbine blade airfoil by a transient liquid phase bonding process. The inner spar preferably comprises a cast single crystal nickel base superalloy. The thin skin may comprise a single crystal or polycrystalline nickel base superalloy or the like.

US Patent:

20050109816, May 26, 2005

Filed:

Nov 26, 2003

Appl. No.:

10/724326

Inventors:

Gary Swartzbeck - North Huntingdon PA, US
Paula Freyer - Fombell PA, US

International Classification:

B23K037/00

US Classification:

228044300

Abstract:

A tooling for affecting the repair of turbine blade tips which generates bond line loads as a result of differential thermal expansion between the work piece and the fixture. The fixture accommodates multiple work pieces of different sizes to facilitate a batch repair process and compressive load limits are established by insertion of deformable compression rings.

US Patent:

20060283916, Dec 21, 2006

Filed:

Aug 29, 2006

Appl. No.:

11/512296

Inventors:

Gary Swartzbeck - North Huntingdon PA, US
Paula Freyer - Fombell PA, US

International Classification:

A47J 36/02

US Classification:

228101000

Abstract:

A tooling for affecting the repair of turbine blade tips which generates bond line loads as a result of differential thermal expansion between the work piece and the fixture. The fixture accommodates multiple work pieces of different sizes to facilitate a batch repair process and compressive load limits are established by insertion of deformable compression rings.

US Patent:

63258714, Dec 4, 2001

Filed:

Jul 6, 2000

Appl. No.:

9/509622

Inventors:

Michael A. Burke - Pittsburgh PA
Paula D. Freyer - Cranberry Township PA
Mohan A. Hebbar - Oviedo FL
Brij B. Seth - Maitland FL
Gary W. Swartzbeck - North Huntingdon PA
Thomas Walter Zagar - Winter Springs FL

Assignee:

Siemens Westinghouse Power Corporation - Orlando FL

International Classification:

B23P 1504
C22F 110

US Classification:

148522

Abstract:

A method of bonding cast superalloys is disclosed. The method includes the steps of casting separate superalloy component parts, machining the mating surfaces of the separate parts in a controlled manner to avoid recrystallization of the material and to ensure a tight fit between the parts, bonding the parts together, and thermally treating the bonded component. In a preferred embodiment, the component is a turbine blade for a land-based gas turbine.

US Patent:

57603715, Jun 2, 1998

Filed:

Dec 8, 1995

Appl. No.:

8/569818

Inventors:

George F. Dailey - Pittsburgh PA
Gary W. Swartzbeck - Huntingdon PA
Greyson L. Mellon - Oviedo FL
Michael T. O'Leary - Apollo PA

Assignee:

Westinghouse Electric Corporation - Pittsburgh PA

International Classification:

B23K 100

US Classification:

219129

Abstract:

A process is disclosed for repairing leaks in turbine generators that have water cooled stator coils with hollow conductor strands. Such generators have a tendency to leak where the stator coil joins a header. Once a leak is detected the repair is accomplished by following the steps off the invention. First, the header is cut into an outboard section, and into an inboard section that remains attached to the conductor strands. Second, the exposed lead ends of the conductor strands and the attached inboard section are cleaned to remove oxidation. Third, a water-tight braze seal is applied over the lead ends of the conductor strands. And finally, the stator coil and the inboard section are joined to a new outboard section.

US Patent:

63312174, Dec 18, 2001

Filed:

Jul 6, 2000

Appl. No.:

9/509600

Inventors:

Michael A. Burke - Pittsburgh PA
Paula D. Freyer - Cranberry Township PA
Mohan A. Hebbar - Oviedo FL
Brij B. Seth - Maitland FL
Gary W. Swartzbeck - North Huntingdon PA
Thomas Walter Zagar - Winter Springs FL

Assignee:

Siemens Westinghouse Power Corporation - Orlando FL

International Classification:

C22F 110
F01D 512

US Classification:

148522

Abstract:

Large gas turbine blades made from separate cast segments of superalloys are disclosed. The turbine blade is designed such that bond lines between adjacent segments are placed in low stress regions of the blade. The cast superalloy segments of the blades are aligned and fitted together with specified tolerances. The turbine blade segments are then joined by transient liquid phase bonding, followed by a controlled heat treatment which produces the desired microstructure in the bond region. The method allows for the production of large, high quality turbine blades by joining small, high quality cast superalloy sections, in comparison with prior attempts to cast large turbine blades as single pieces which have produced very low yields and high individual component costs.