COOLING SYSTEM FOR DYNAMOELECTRIC MACHINES

• US 3,634,705 A
• Filed: 04/23/1970
• Issued: 01/11/1972
• Est. Priority Date: 04/23/1970
• Status: Expired due to Term

• Current Assignee: Frank P. Fidei
• Original Assignee: Frank P. Fidei
• Inventors: Fidei, Frank P.
• Primary Examiner(s): Miller, J. D.
• Assistant Examiner(s): Reynolds, B. A.
• Application Number:
  US05/031,296
• Time in Patent Office: 628 Days
• Field of Search: 310/52,54,55,57,64,65,58
• US Class Current: 310/57
• CPC Class Codes: H02K 3/22 consisting of hollow conductors

Abstract

A connecting means for use in the cooling systems of large turbine generators in which coolant is circulated through the coils of the stator winding in a closed system. A common hydraulic and electrical connector is provided for each end of each winding conductor, or half-coil, which makes connection between the conductor and the coolant supply system and also provides for electrical connection to the conductor.

Claims

1. In a dynamoelectric machine having an annular stator core with longitudinal slots therein, winding conductors disposed in said slots, each of said conductors comprising a plurality of strands, each of said conductors comprising a plurality of strands, at least some of said strands being hollow for circulation of a coolant fluid therethrough, a coolant supply system for supplying coolant fluid, connector means at each end of each conductor, each of said connector means enclosing the end of the conductor and being joined thereto with fluidtight, electrically conductive joints, the connector means having conduit means extending therefrom for flow of said coolant fluid, the connector means also having terminal means for making electrical connection thereto, the winding conductors being arranged in said slots such tat each conductor has at least one end disposed adjacent one end of another conductor for connection thereto, the connector means of each such pair of adjacent conductor ends being connected together by flexible electrical conductors secured in said terminal means, a conduit pipe connected to the conduit means of both connector means of each such pair of adjacent conductor ends, an insulating tube member connecting each said conduit pipe to said coolant supply system, and substantially rigid support means for supporting said conduit pipes from said conductor ends.

2. The combination defined in claim 1 in which said support means comprises a bracket member secured to the connector means of one of each such pair of adjacent conductor ends and means for clamping the associated conduit pipe to each of said bracket members.

3. In a dynamoelectric machine having an annular stator core with longitudinal slots therein, winding conductors disposed in said slots, each of said conductors comprising a plurality of strands, at least some of said strands being hollow for circulation of a coolant fluid therethrough, a coolant supply system for supplying coolant fluid, connector means at each end of each of said conductors, each of said connector means comprising a conducting header member enclosing the end of the conductor, said strands being disposed in a plurality of columns, conducting spacers disposed between adjacent columns of strands with the header member, the strands being joined to the header member and to each other with fluidtight, electrically conductive brazed joints between the spacers and the adjacent columns of strands, between the columns of strands and the header member, and between adjacent strands, the surfaces of the header member and of the spacers in contact with the strands having grooves therein for receiving a brazing alloy to make said joints, means for connecting the header member to said coolant supply system, and means on the header member for making electrical connection thereto. 4, In a dynamoelectric machine having an annular stator core with longitudinal clots therein, winding conductors disposed in said slots, each of said conductors comprising a plurality of strands, at least some of said strands being hollow for circulation of a coolant fluid therethrough, a coolant supply system for supplying coolant fluid, connector means at each end of each of said conductors, each of said connector means comprising a conducting header member enclosing the end of the conductor, said strands being disposed in a plurality of columns, the header member comprising a sleeve member surrounding the strands and extending beyond the ends thereof and a closure member closing the end of the sleeve member, conducting spacers disposed between adjacent columns of strands within said sleeve member, the interior surfaces of the sleeve member and the surfaces of tHe spacers having grooves therein for receiving a brazing alloy to make fluidtight, electrically conductive joint between the spacer and the adjacent columns of strand, between the columns of strands and the sleeve member, and between adjacent strands, conduit means extending through said closure member for connection to the coolant supply system, and terminal means on the closure member for making electrical connection to the header member.