Flow-through spaceblocks with deflectors and method for...

H - Electricity – 02 – K

Patent

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H02K 9/10 (2006.01) H02K 3/24 (2006.01)

Patent

CA 2399350

A gas cooled dynamoelectric machine is provided that includes a rotor (10) having a body portion (14), axially extending coils (22), endwindings (28), and a plurality of spaceblocks (150, 152, 154, 156, 158) disposed between the endwindings, so that a plurality of cavities (142, 1§44, 146, 148) are defined between mutually adjacent endwindings and spaceblocks. To increase endwinding cooling, at least one of the spaceblocks (150, 152, 154, 156, 158) has a passage (160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 182, 184, 186) extending between first and second adjacent cavities to provide for cooling flow communication between the first and second cavities through the spaceblock. A flow deflector (188, 190) is preferably provided adjacent a radially inner end of one, the other, or both of the cavity facing surfaces of the spaceblock for directing flow into or out of the first and second cavities, respectively.

L'invention concerne une machine dynamoélectrique refroidie au gaz comprenant un rotor (10) présentant un corps (14), des bobines s'étendant axialement (22), des enroulements d'extrémité (28) et une pluralité de blocs espaces (150, 152, 154, 156, 158) disposés entre les enroulements d'extrémités de manière à délimiter une pluralité de cavités (142, 144, 146, 148) entre les enroulements d'extrémité et les blocs espaces adjacents. Afin d'augmenter le refroidissement des enroulements d'extrémité, au moins un des blocs espaces (150, 152, 154, 156, 158) comporte un passage (160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 182, 184, 186) s'étendant entre des première et seconde cavités adjacentes et assure par la même une communication fluidique de refroidissement entre les première et seconde cavités via le bloc espace. Un déflecteur d'écoulement (180, 190) est placé de préférence adjacent à une extrémité radialement interne d'une ou des deux surfaces opposées à la cavité du bloc espace de manière à diriger l'écoulement dans ou hors des première et seconde cavités.

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