BEARING COOLING VENTILATION STRUCTURE OF DYNAMO ELECTRIC MACHINE

PURPOSE: To increase the volume cooling air which passes an air-cooling oil cooler and to minimize the volume cooling air passing through a cooing fin by providing a bypass wind tunnel for guiding cool air after passing through an air-cooled oil cooler from the other side of a bearing to a rotor or...

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Bibliographic Details
Main Author YAMATO ATSUSHI
Format Patent
LanguageEnglish
Published 18.10.1996
Edition6
Subjects
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
ELECTRICITY
GENERATION
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Summary:PURPOSE: To increase the volume cooling air which passes an air-cooling oil cooler and to minimize the volume cooling air passing through a cooing fin by providing a bypass wind tunnel for guiding cool air after passing through an air-cooled oil cooler from the other side of a bearing to a rotor or a stator. CONSTITUTION: The lower edge part of a generator shaft 10 is supported at a lower bracket 13 so that it can freely rotate and a cooling fin 14 is formed at the outer periphery of a lower guide bearing oil bath 6. Therefore, by rotating a cooling fan 3 along with a rotor 5, cooling air is guided from outdoors to the inside of a power station as shown by an arrow for cooling a stator 4 and a rotor 5 and is delivered outdoors through an exhaust wind tunnel 7. One portion of the cooling air which passed through an air cooled oil cooler 2 and cooled a thrust bearing oil bath 1, passes from upper to lower part in a bypass wind guide 8, passes near the cooling fin 14, and is guided to the stator 4 and the rotor 5. However, the cooling air passing through the bypass wind tunnel 8 is not guided to the lower guide bearing oil bath 6 and should be the minimum air volume required for passing the cooling fin 14 as conventionally.
Bibliography:Application Number: JP19950073086