Luis N Estrada

US Patent:

6803688, Oct 12, 2004

Filed:

Jul 31, 2002

Appl. No.:

10/208209

Inventors:

Luis Alberto Estrada - Clifton Park NY
Christopher Steven Terrey - Albany NY
David Robert Kettlewood - East Greenbush NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

H02K 5124

US Classification:

310 90, 310 55

Abstract:

The bearing housing of an electrical generator is isolated from the interior of the generator enclosure by forming a cavity in the generator end wall with a seal between the generator end wall and the rotor. By sealing the bearing housing from the interior of the enclosure, the bearing housing is subject entirely to ambient pressure while the interior of the generator is subject to high vacuum pressure for cooling purposes. This isolation minimizes or eliminates potential for oil leakage into the interior of the generator previously caused by exposure on one side of the bearing housing to high vacuum pressure within the generator enclosure and the opposite side to the ambient pressure. This isolation system also eliminates the need for a high suction pressure vapor extractor and enables a conventional vapor extractor associated with the lubrication oil system to remove oil vapors from the bearing housing.

US Patent:

49168037, Apr 17, 1990

Filed:

May 30, 1989

Appl. No.:

7/361811

Inventors:

Luis A. Estrada - Clifton Park NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

H02K 1514

US Classification:

29596

Abstract:

Keybar slots in support plates of a large generator stator are made substantially oversize to accommodate the full probable distortion of the support plates occurring during fabrication of the stator frame. Keybars are affixed to pairs of auxiliary plates. The keybars are aligned within the oversize keybar slots, and then the auxiliary plates are affixed or welded to the stator support plates.

US Patent:

39406482, Feb 24, 1976

Filed:

Sep 5, 1974

Appl. No.:

5/503269

Inventors:

Warren Pierce Wielt - Schenectady NY
Luis Alberto Estrada - Schenectady NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

H02K 106

US Classification:

310217

Abstract:

A stack of stator core laminations are compressed between a pair of resilient end flanges that are flexed into a dished configuration and secured in a pre-determined spaced-apart relationship by being welded to a plurality of longitudinal ribs disposed around the periphery of the stator laminations. Special tools and welding techniques are used during the manufacture of the core assembly to cause the dished flanges to continuously apply a pre-determined compressive force to the stacked laminations after the core assembly is completed.

US Patent:

40078671, Feb 15, 1977

Filed:

Nov 12, 1975

Appl. No.:

5/631295

Inventors:

Warren Pierce Wielt - Schenectady NY
Luis Alberto Estrada - Schenectady NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

H02K 1502
B23K 1900

US Classification:

228179

Abstract:

A stack of stator core laminations are compressed between a pair of resilient end flanges that are flexed into a dished configuration and secured in a pre-determined spaced-apart relationship by being welded to a plurality of longitudinal ribs disposed around the periphery of the stator laminations. Special tools and welding techniques are used during the manufacture of the core assembly to cause the dished flanges to continuously apply a pre-determined compressive force to the stacked laminations after the core assembly is completed.

US Patent:

39539210, May 4, 1976

Filed:

Mar 18, 1975

Appl. No.:

5/559453

Inventors:

Luis Alberto Estrada - Schenectady NY
Warren Pierce Wielt - Schenectady NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

H02K 1506

US Classification:

29596

Abstract:

A dynamoelectric machine is provided with a tieless bracing means for rigidly supporting the winding end turns thereof in operating position. The tieless bracing arrangement affords axial and radial movement of a compressible annulus while avoiding torsion loading of the annulus support structure. A new method is also disclosed for applying a tieless bracing to a dynamoelectric machine.