| 摘要 |
<p>The claimed invention relates to the electric machine industry and is designed for use in a ventilation system of an electrical machine of a large size, such as a high-powered turbine generator with air-cooled stator and rotor. The electrical machine is vented in the following way. The air, under forcing action of the fans 6, enters into the inlet collector 8, then into the radial ducts 7, 18 of the ventilation zones 15. The air flows into the gap 10 and the ventilation ducts 12 of the rotor from the radial ducts 7, then via the gap 10 and the radial ducts 7 of the ventilation zones 16 it is discharged into a low-pressure area through the outlet collectors 11. The air is also discharged from the radial ducts 18 into a low-pressure area through the outlet collectors. Tangential movement of the air in the ducts 7 of the ventilation zones 15,16 is carried out through the bypass openings 25. Tangential movement of the air in the ducts 18 is carried out through the bypass openings 20. Installation of the stator ventilation ducts closed from the gap side in zones 12, 13 permits to reduce the temperature of the stator active parts in the outlet zones (up to ~25°C) and the temperature of the rotor winding (up to ~10°C). Moreover temperature pattern of the active parts along the length of the machine is more uniform. The said advantages of the ventilation system permits to increase unit capacity of the electrical machine. 3 subclaims, 4 drawings.</p> |
