Method and apparatus for bolted series/phase generator connections

• US 4,806,807 A
• Filed: 01/09/1987
• Issued: 02/21/1989
• Est. Priority Date: 01/09/1987
• Status: Expired due to Fees

• Current Assignee: Westinghouse Electric Corporation (Paramount Global (f/k/a ViacomCBS Inc.))
• Original Assignee: Westinghouse Electric Corporation (Paramount Global (f/k/a ViacomCBS Inc.))
• Inventors: Levino, Andre J.
• Primary Examiner(s): Budd, Mark O.
• Assistant Examiner(s): JONES, JUDSON
• Application Number:
  US07/002,063
• Time in Patent Office: 774 Days
• Field of Search: 310/52, 310/54, 310/64, 310/65, 310/57, 310/58, 310/71, 310/260
• US Class Current: 310/71
• CPC Class Codes: H02K 15/0093 Manufacturing or repairing cooling fluid boxes, i.e. terminals of fluid cooled windings ensuring both electrical and fluid connection
• CPC Class Codes: H02K 3/22 consisting of hollow conductors
• CPC Class Codes: H02K 3/505 for large machine windings, e.g. bar windings H02K3/51 takes precedence

Abstract

In an electrical generator, a connector for connecting stator coil sections and the method of making that connection, each coil section ending in a header cap of a predetermined geometry, and the connector being provided with openings of complementary geometry and spaced and aligned so as to receive the header caps. A recording tool is used for recording the spacing and alignment of a pair of header caps to be connected, the recorder being used in conjunction with a drill rig for drilling the openings in accordance with the recorded spacing and alignment information. The solid connector bar is placed over the header caps which are received within the drilled openings, and the bar is clamped onto the header caps with nuts.

Claims

1. An electrical generator comprising connectors which connect coil ends, said coil ends having a spacing therebetween and respective axes of projection, each of said connectors being characterized by:

first and second header caps having a predetermined geometry on respective ends of a pair of coil sections,

a respective water hose nipple integrally connected to each of said header caps, each said nipple having a threaded portion extending upward therefrom,

a solid connector bar of a conductive material, said bar having two receiving openings of a geometry complementary to said predetermined geometry and a spacing equal to said coil end spacing, said openings having respective axes corresponding to said axes of projection, and

clamping means for clamping said bar so that said header caps are tightly received in said openings, wherein said clamping means comprises a nut screwed onto said threaded portion of each said water hose nipple.

2. In an electrical generator having stator coil sections and connectors connecting pairs of said sections at their ends, said ends of each pair being aligned with respect to each other with an axial variation and spacing within predetermined tolerances, the improvement wherein at least one of said connectors comprises a solid conductive bar and mechanical means for mechanically connecting said bar to the end of each coil section of its pair, said coil ends each having a header of a predetermined geometry, said bar having a pair of receiving openings therein for receiving said headers, wherein each said header comprises a threaded portion which extends through its receiving opening, and said mechanical means comprises a nut for engaging each said header threaded portion, said openings corresponding to said predetermined geometry, whereby said headers are received in said openings and said bar is tightly connected thereto by said mechanical means.

3. An electrical generator having a stator including a plurality of coil sections preselected pairs of which are connected together at their ends by respective ones of a plurality of connectors, both of the coil ends in each of the preselected pairs projecting axially outward from an end of the stator spaced apart at respective axes, wherein each of the projection axes and spacings are variable one from the other, each of the connectors being characterized by:

first and second header caps having a threaded portion and a predetermined geometry which extends along the projection axis from respective coil ends in a respective one of the preselected pairs, the coil ends in said respective one of the preselected pairs being spaced apart by a distance that is variable as compared to the spacings of other ones of the preselected pairs,

a solid connector bar of a conductive material, said bar having two receiving openings spaced apart by said distance, each said opening having a complementary geometry to said predetermined geometry and extending along the respective projection axis of a respective one of said first and second second header caps that is adapted to be received in said opening, and

clamping means for clamping said bar so that said header caps are tightly received in said openings, said clamping means comprising a nut screwed onto said threaded portion of each of said header caps.

4. In an electrical generator having stator coil sections and connectors connecting pairs of the sections at their ends, the respective ends of each pair projecting axially outward from the generator at differing axes spaced apart by a distance that is variable among the pairs within predetermined tolerances, the improvement wherein at least one of said connectors comprises a solid conductive bar and mechanical means for mechanically connecting said bar to both ends of its respective pair of coil sections, said ends each having a header of a predetermined geometry, said header having a threaded portion, said mechanical means comprising a nut for engaging each said header threaded portion, said bar including a pair of openings therein for receiving said headers, each said opening having a complimentary geometry to said predetermined geometry and extending along the projection axis of the respective header it is adapted to receive spaced apart by said distance, whereby said headers are received in said openings and said bar is tightly connected thereto by said mechanical means.