Liquid-cooled rotor for dynamoelectric machines

• US 3,908,140 A
• Filed: 06/14/1974
• Issued: 09/23/1975
• Est. Priority Date: 06/14/1974
• Status: Expired due to Term

• Current Assignee: Frank P. Fidei, Sui-Chun Ying, Warren W. Jones
• Original Assignee: Frank P. Fidei, Sui-Chun Ying, Warren W. Jones
• Inventors: Fidei, Frank P., Ying, Sui-chun, Jones, Warren W.
• Primary Examiner(s): Skudy, R.
• Application Number:
  US05/479,386
• Time in Patent Office: 466 Days
• Field of Search: 310/52,53,54,55,56,57,58,59,270,60,61,64,65
• US Class Current: 310/54
• CPC Class Codes: H02K 3/22 consisting of hollow conductors
• CPC Class Codes: H02K 9/00 Arrangements for cooling or ventilating channels or ducts in parts of the magnetic circuit H02K1/20, H02K1/32; channels or ducts in or between conductors H02K3/22, H02K3/24

Abstract

A liquid-cooled rotor is provided for large dynamoelectric machines such as turbine generators. Coolant liquid, preferably water, is supplied through a shaft bore and radial passages to a distribution chamber from which it flows to the rotor winding conductors through tubes placed in slots in the surface of the shaft. The water tubes extend under the end turn portions of the rotor winding coils substantially longitudinally to the body portion of the rotor and then radially outward into the spaces between the longitudinal coil sides. The tubes extend back longitudinally through these spaces to the ends of the coils and are connected to the individual turns of the winding near the centers of the circumferential portions of the coils.

Claims

1. A rotor member for a dynamoelectric machine comprising:

a body portion and shaft portions connected thereto, a winding comprising a plurality of concentrically-disposed multi-turn coils, each coil having a plurality of conductors having longitudinal portions lying in slots in said body portion and extending beyond the body portion and circumferential portions joining the ends of said longitudinal portions, said longitudinal portions being spaced apart circumferentially and defining longitudinal spaces therebetween and said circumferential portions being spaced apart longitudinally and defining circumferential spaces therebetween, said conductors having passages for flow of coolant liquid, a plurality of slots in said shaft portion extending longitudinally and terminating adjacent said body portion, a plurality of coolant tubes disposed in said shaft slots and extending under said circumferential portions of said coil, said coolant tubes extending in said slots substantially to the ends thereof, said coolant tubes extending generally radially from said shaft slots adjacent the end of said rotor body portion into said longitudinal spaces between said longitudinal portions of said conductors, said coolant tubes then extending longitudinally through said longitudinal spaces between said longitudinal portions of said conductors and circumferentially in said circumferential spaces between said circumferential portions of said conductors, said coolant tubes being connected to said circumferential portions of at least some of said conductors adjacent the centers thereof to communicate with said passages therein, said coolant tubes extending through each of said longitudinal and circumferential spaces being in vertically-spaced relation in positions generally corresponding to the conductors to which they are connected, and, means for supplying coolant liquid to said tubes to flow through said tubes and passages.

2. A rotor mEmber as defined in claim 1 in which each of the coolant tubes includes a main portion, a terminal portion connected to the conductor, and joint means connecting the main and terminal portions of the tube.

3. A rotor member as defined in claim 2 in which said main portion of each coolant tube extends longitudinally, the terminal portion of each tube extends circumferentially, and the joint means are positioned adjacent the junctions between the longitudinal and circumferential portions of the conductors.

4. A rotor member as defined in claim 1 in which said coils are generally rectangular and disposed in at least two pole groups, the longitudinal portions of successive coils of each group lying at progressively greater distances from a common longitudinal center line, the coolant tubes connected to each coil being disposed in a single longitudinal space on one side only of said center line and being connected to the circumferential portions of the conductors adjacent the center thereof.

5. A rotor member as defined in claim 4 in which the coolant tubes connected to successive coils are disposed alternately on opposite sides of the center line.

6. A rotor member as defined in claim 5 in which each coolant tube includes a main portion extending longitudinally and circumferentially, a terminal portion connected to the conductor, and joint means connecting the main and terminal portions of the tube, the joint means of the tubes connected to each coil being disposed at varying distances from the center line.

7. A rotor member as defined in claim 1 in which said coils are generally rectangular and disposed in at least two pole groups, the longitudinal portions of successive coils of each group lying at progressively greater distances from a common longitudinal center line, the coolant tubes connected to adjacent conductors of each coil being disposed alternately in longitudinal spaces on opposite sides of the center line.