Wei Tong

US Patent:

6346755, Feb 12, 2002

Filed:

Jun 30, 2000

Appl. No.:

09/607911

Inventors:

Wei Tong - Clifton Park NY
Christian Lee Vandervort - Voorheesville NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

H02K 112

US Classification:

310 58, 310 52, 310216, 310254, 310259

Abstract:

A rotor assembly including a rotor body and a stator, the rotor body having field coils seated within radial slots formed in the rotor body with end turns of the coils extending beyond opposite ends of the rotor body, and annular retaining rings fixed to the opposite ends of the rotor body and adapted to constrain the end turns against centrifugal forces, and wherein the stator includes a core with stator bars secured therein, the core having core-end tapers at opposite ends thereof that define, in combination with the retaining rings, annular ventilation air exit gaps; each the retaining ring comprising axially inboard and outboard ends, and wherein a radially outer surface at the axially inboard end has an aerodynamically smooth spline shape defined by compound radii that merges into a rounded nose portion, the core-end tapers of the stator core tapering in an axial and radially outward direction in a manner approximating a smooth curve.

US Patent:

6353198, Mar 5, 2002

Filed:

Jun 14, 2000

Appl. No.:

09/594541

Inventors:

Wei Tong - Clifton Park NY
Zhangqing Zhuo - Clifton Park NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

B23K 900

US Classification:

219 5622, 219137 R

Abstract:

Welded stator winding splice joints are provided that utilize gas tungsten arc welding to offer high performance and reliability. The application of welded stator winding joints can significantly raise operation reliability of rotary electric machines such as turbine generator and induction motors, simplify the manufacturing process, and reduce the cost and product cycle time.

US Patent:

6390476, May 21, 2002

Filed:

Sep 8, 2000

Appl. No.:

09/657527

Inventors:

Wei Tong - Clifton Park NY
ZhangQing Zhuo - Clifton Park NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

F16J 15447

US Classification:

277355

Abstract:

A brush seal includes a brush seal body formed of heat-resistant magnetic silicone rubber material in the form of a channel. Bristles are disposed in the channel of the brush seal body at a cant angle and project from the edges of the body terminating in bristle tips. The brush seal is formed linearly and, in use, flexed to form an annular seal between adjacent annular sealing components, with the seal carried by one component and the bristle tips engaging the opposite component. The magnetic material of the seal body enables temporary securement of the seal to one of the components, while the seal is adjusted and finally secured in place.

US Patent:

6431550, Aug 13, 2002

Filed:

Sep 25, 2000

Appl. No.:

09/669452

Inventors:

Wei Tong - Clifton Park NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

F16J 1544

US Classification:

277346, 277355, 277500, 277543, 277546

Abstract:

A seal is provided at the intersegments of hydrogen seal rings for preventing oil leakage through this potential gap between the seal ring segments. By minimizing leakage through the gaps between the open rings, hydrogen consumption in hydrogen-cooled generators due to leakage oil is reduced. In a preferred embodiment, the seal is provided by a brush seal secured to one of the seal ring segments and received in a slot defined in the other of the seal ring segments.

US Patent:

6438820, Aug 27, 2002

Filed:

Mar 28, 2000

Appl. No.:

09/536415

Inventors:

Wei Tong - Clifton Park NY
Brian E. B. Gott - Delanson NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

H02K 1502

US Classification:

29598, 29596, 29732, 310214

Abstract:

In a rotating electric machine including a rotor and a stator surrounding said rotor in substantially concentric relation therewith to establish a gap therebetween, and wherein the stator is formed with a plurality of radially oriented slots, each slot receiving a stator bar held in place by a wedge, an arrangement to minimize rotor windage loss wherein each wedge substantially fills its respective slot such that an end surface of the wedge is substantially flush with adjacent surfaces of the stator.

US Patent:

6462458, Oct 8, 2002

Filed:

Apr 24, 2001

Appl. No.:

09/840465

Inventors:

Wei Tong - Clifton Park NY
Christian Lee Vandervort - Voorheesville NY
William Hunter Boardman - Burnt Hills NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

H02K 346

US Classification:

310270

Abstract:

The series loop blocks of an armature end-winding structure are formed with grooves along a portion of their side surfaces to allow air flow to pass through the grooves to the series loop caps. Provision of the grooves on the side surfaces also facilitates machining of the ungrooved side surface portions of the series loop blocks for better fit and assembly between adjacent series loop caps.

US Patent:

6464230, Oct 15, 2002

Filed:

Oct 19, 2000

Appl. No.:

09/691978

Inventors:

Wei Tong - Clifton Park NY
Robert Russell Mayer - Schenectady NY
Mahmut Faruk Aksit - Troy NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

F16J 1544

US Classification:

277355, 277410

Abstract:

A flexible magnetic brush seal is employed as a low flow fluid film seal and/or a diffusion and mass transfer prevention seal in a hydrogen generator to seal between a hydrogen atmosphere and a fluid on an opposite side of the seal. The brush seal is formed of a magnetic rubber flexible material, enabling the seal to be flexed and altered in dimension to fit a number of different sealing environments of different dimensions. The magnetic properties of the brush seal enable temporary securement of the brush seal to a brush seal holder prior to final securement.

US Patent:

6498408, Dec 24, 2002

Filed:

Dec 20, 2000

Appl. No.:

09/740008

Inventors:

Wei Tong - Clifton Park NY
Zhang Qing Zhuo - Clifton Park NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

H02K 132

US Classification:

310 65, 310 60 A

Abstract:

A ventilation pathway for a cooling gas to flow extends on a radial axis in a generator stator core. The ventilation pathway comprises at least two magnetic laminations and a plurality of space blocks extending radially in the generator stator core. The space blocks are fastened and disposed between the magnetic laminations. At least one of the space blocks includes a wavy longitudinal profile that includes an alternating pattern of peaks and valleys with respect to the radial axis of the generator stator core. Alternatively, at least one of the space blocks has a plurality of protrusions defining a pattern of peaks and valleys extending from a sidewall of the space block. Several different shapes of vortex generators are punched in the lamination are located within the ventilation pathway.