Liquid-cooled rotor for dynamoelectric machines

Claim 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.