Fluid reaction surfaces (i.e. – impellers) – Ambient fluid or exhaust gas directed through hub – fairing...
Patent
1977-02-17
1978-09-19
Skudy, R.
Fluid reaction surfaces (i.e., impellers)
Ambient fluid or exhaust gas directed through hub, fairing...
416185, 416DIG3, 310 51, 310 62, 415119, F01D 500
Patent
active
041150309
ABSTRACT:
A rotary electric machine comprising a housing containing therein several parts which are to be heated during operation of the machine, and a centrifugal cooling fan for producing an air circulation through the housing so as to cool the heated parts. The cooling fan is made of a disc-shaped metal plate having on its periphery a plurality of fan blades each formed by bending a radially outer portion of the metal plate upstandingly with respect to the surface thereof, and a plurality of notches each defined between the adjacent fan blades. A backing disc-plate is disposed at the back side of the cooling fan in a manner to block therewith the notches, thereby preventing an air from passing through the notches in an opposite direction from an ordinary air flow passing through the housing. The disc-plate and the cooling fan are disposed to define a small clearance therebetween for preventing rattling noises from being produced during rotation of the cooling fan due to an occasional vibratory contact therebetween.
REFERENCES:
patent: 2032552 (1936-03-01), Seyfried
patent: 2512905 (1950-06-01), Willits
patent: 3252025 (1966-05-01), Brown
patent: 3367687 (1968-02-01), Jenkins
patent: 3534204 (1970-10-01), Groezinger
Inagaki Mitsuo
Kurahashi Takashi
Sasaya Hideaki
Nippon Soken Inc.
Skudy R.
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