Westinghouse Electric Corporation

Glenn D Cooper

Charles M Rowe

Donald C Litz

Gurdev Dave Singh

Lon W Montgomery

John M Butler, Iii

William R McCown

Henry M Holly, Iii

Felix M Detinko

Andre J Levino

Charles L Senic

Lennart S Nilsson

Darrell R Morrison

Harry S Loh, Jr

Robert M Colangelo

Franklin J Murphy, Jr

John D Pharr, Jr

A method of designing and manufacturing an electrical generator which has a specific target power output rating includes the steps of selecting one of a predetermined, standardized set of diameters for the rotor, stator and frame of the generator; and subsequently selecting the length of the generator stator core and one of several standardized number of stator coil slots based on the target power rating and voltage of the generator. The invention permits standardized generator components which are specific to the selected set of diameters to be used during assembly of the generator, instead of customized components, which results in reduced design and manufacturing costs per generator.

Method of manufacturing a modular electrical generator

A simplified, readily removable air gap baffle ring for a gas cooled dynamoelectric machine, such as a turbine generator. The baffle ring comprises two composite rings with a seal material sandwiched therebetween and bonded into a single ring structure. The seal ring attaches to finger plate extensions which are an integral part of the generator core, and forms an air gap seal between the rotor retaining ring and end wedges which extend from the stator coil slots. The air gap baffle assembly of the present invention effectively seals the high pressure zone of the exciter end of the generator, from the lower pressure radial air gap zone located between the generator rotor and stator, to thereby force cooling gas to flow into the rotor and stator.

Air gap baffle ring for a dynamoelectric machine

A spring support system for supporting a stator core (2) in a frame of an electrical machine, the core (2) having a longitudinal axis and an outer periphery provided with a plurality of circumferentially spaced, axially extending dovetail grooves (6), and the frame including a plurality of circular flanges (32) which surround the core (2) when the core (2) is installed in the frame, the system including:

Generator core support system

A structure for consolidating large turbine generator end turns while providing for thermal compensation includes a decoupled brace that is located radially outside the end turns and has a bottom piece secured to a bracket secured to the core as well as a top piece adjacent the coil and an intermediate decoupler between the two that includes elastomeric material for cushioning as well as a slip layer for allowing free axial movement between the top and bottom pieces of the brace. Additionally, keyed strain blocks may be utilized between top and bottom coils of the assembly for greater consolidation.

Turbine generator stator end winding support assembly with decoupling

A mechanical clamping assembly and the method of its application for use on the stator end windings of large steam turbine generators is provided that can be fit in the mid-involute region of the end winding, including any existing machines as may be in use in the field as well as in original manufacture. The invention maintains pressure contact between coils and strain blocks and eliminates the freedom of the coils to vibrate relative to the total end basket assembly. The method comprises steps of forming a loop of impregnated banding material that extends through apertures of support blocks that span a pair of adjacent top and bottom coils, inserting pins in the ends of the loop, twisting a pin, curing the banding material, pulling on a pin to pretension the banding and shimming the pulled pin so that upon its release a tight assembly is provided.

Radial clamp assembly for dynamoelectric machine stator coil end turns

A gland seal assembly is provided which utilizes a double oil flow in conjunction with two gland seal rings. One of the oil streams is passed through a gland seal ring in a radial direction into the clearance gap between that ring and a rotatable shaft. Another flow of oil is passed between that ring and another gland seal ring in such a way as to exert a force between the rings which pushes the two rings in opposing axial directions away from each other and toward axial faces of an angular groove in a gland seal bracket. By causing a force against the gland seal rings in axial opposing directions, the rings are moved towards the axial faces of an annular groove in such a way that gaps between the gland seal rings and the groove wall are reduced with a corresponding reduction in the non-functional flow of oil.

Dual-ring gland seal for dynamoelectric machine rotor

A rotor is provided for an alternating current generator carrying a superconducting field winding and having a combined damper and shield member on the rotor. The damper-shield member is a composite cylindrical member extending over the field winding and consisting of concentric inner and outer cylinders of a high-strength, non-magnetic alloy and an intermediate cylinder of aluminum or other material of high electrical conductivity.

Rotor member for superconducting generator

A rotor is provided for an alternating current generator carrying a superconducting field winding and having a combined damper and shield member comprising a cylindrical member of high electrical conductivity. The shield member is attached to the rotor only at the end opposite the drive shaft and is supported on the rotor at the drive end in a manner to permit relative movement between the shield and the support.

End winding conductors are attached to bracing rings which are connected to a plurality of support brackets positioned around the outside of the conductors. The support brackets are attached to a ring-shaped member which has its radial movement restrained by a plurality of blocks which are positioned around the outside of the ring-shaped member. The blocks are adjustably attached to another ring which is fixed to the stator iron core. Springs are positioned between the ring-shaped member and the stator iron core to provide an axial load on the support brackets. Conductor movement due to thermal changes is prevented in the radial direction but permitted in the axial direction due to the axial movement of the ring-shaped member with respect to the blocks.

End winding restraint assembly for turbine generators

Apparatus for securing the end winding conductors of turbine generators. Support rings extend around the end winding conductors and are braced against the conductors by resin filled hoses located therebetween. The hoses extend around the circumference of the support rings and are pressure filled with a curable resin to produce a force between the conductors and the support rings.

End winding conductor securing arrangement

Wedge-shaped insulating blocks are located between conductors at the end of the stator winding coils. The blocks tangentially separate adjacent conductors at a plurality of positions around the periphery of the stator winding structure. A band is positioned around several of the conductors and blocks to force the structure together. Cross-bands are positioned around the blocks and the band which surrounds the group of conductors to tighten the surrounding band. Wedges may be positioned between all of the banded groups to secure the entire stator winding assembly.

Growing community of inventors

Orlando, FL, United States of America

Glenn D Cooper