Rotor rim-ventilated generator with turning vanes for rotor inlet coolant gas
AssigneeGeneral Electric Company
InventorHarold Lown
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Abstract
Turning, or pre-swirl, vanes are housed in stationary walled annular passages located in juxtaposition with coolant gas supply slots through which coolant gas, usually air, enters the rotor structure of a rotor rim-ventilated generator. Coolant gas flow admitted through the annular passages is turned in the direction of the rotor rotation and provided with an initial tangential velocity by the turning vanes.
Claims7
A rotor rim-ventilated generator having a stator member, a rotor member concentric therewith and a gap between said rotor and stator members, means connected to said rotor member for driving said rotor member, said stator member having windings thereon and said stator member and the rim of said rotor member each having ventilation ducts extending therethrough in the generally radial direction for the passage of cooling gas, the improvement comprising means effective during operation for simultaneously admitting coolant gas flow to said rotor member and turning said gas flow in the direction of rotor rotation, said admitting and turning means being stationary and being disposed adjacent each of the two generally planar walls of said rotor member radially inward of said rotor rim in flow communication with the radially inner end of the rotor rim ventilation ducts.
Dependencies are inferred from the claim text.