LOW-NOISE FAN BY KOCHETOV Russian patent published in 2017 - IPC F04D29/66 

FIELD: machine engineering.

SUBSTANCE: in fan mounted on a frame, on which a shaft is mounted in supports, at one end of which there is a fan impeller rigidly fixed on the shaft, wherein the shaft being driven by a v-belt transmission from an electric motor arranged on the frame, a skeleton is rigidly fixed to the frame and consisting of corners to fix a fan casing with inlet and outlet branch pipes thereto through flexible gaskets, and shaft support casings are mounted on the frame through the flexible gaskets and shaft bearings are mounted in the casings of the supports by means of flexible bushings, wherein resilient vibration-insulating gaskets can be used as gaskets made from mats of KV-1 or KV-2 type or other vibration-insulating material, flexible bushings can be made of polyurethane or other vibration-insulating elastomers.

EFFECT: improved efficiency of noise suppression.

3 dwg