Double-walled centrifugal fan scroll and system of operation

Rotary kinetic fluid motors or pumps – Including additional means causing or controlling fluid flow...

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Details

415201, 415219C, 417428, 60646, F04D 2958, F04B 2304

Patent

active

045265100

ABSTRACT:
A hot gas centrifugal fan is constructed with a scroll part comprising spaced-apart walls 16 and 18 to define a hot gas passage 22 therebetween to which hot gas is conveyed when the fan is in a non-operating condition to hold the fan temperature sufficiently high to avoid unacceptable vibration brought on by thermal distortion of the fan wheel upon a re-start of the fan.

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