Rotor for hydrogen-cooled rotary electric machines

Claim 1

A rotor for hydrogen-cooled electric machines comprising: a rotor shaft; a plurality of rotor windings disposed about said rotor shaft; a retaining ring for holding said rotor windings in position on said rotor shaft; a center ring secured to said retaining ring; gas inlet and outlet chambers circumferentially defined by said center ring and radially extending partition walls and disposed in a region between said rotor shaft and said retaining ring; a plurality of fan-like ventilating means disposed on the outer side of the rotor end for discharging outside of the rotor gases which are introduced from said gas inlet chamber through the rotor windings to cool the same and then flow into the gas outlet chamber; wherein the improvement comprises means including L-shaped insulating spacers and circumferentially extending partition walls mounted on the underside of the lowermost winding of selected laminated windings for dividing said gas outlet chamber into first and second zones located near the polar axis of the rotor and a third zone located near the interpolar axis thereof, said plurality of fan-like ventilating means including first fan-like ventilating means disposed on the outer side of said center ring for discharging gases from said first and third zones of said gas outlet chamber and second fan-like ventilating means for discharging gases from said second zone of said gas outlet chamber.