AXIAL-FLOW FAN Russian patent published in 2010 - IPC F04D19/00 

FIELD: engines and pumps.

SUBSTANCE: proposed fan comprises cylindrical casing and cup with pylons connected thereto, motor with outer cylindrical surface groove groove arranged inside the cup by means of pressure ring pressed against cup face by screws arranged in pressure ring axial holes and screwed in axial threaded holes of pressure ring, split element received in said groove and divided into parts by meridional slots, and impeller fitted on motor shaft. Note here that said split element represents a sleeve with inner and outer collars arranged on the sleeve opposite faces. Cartridge is mounted on sleeve outer surface with its first face thrusting against outer collar face. Sleeve outer surface stays in contact with motor outer cylindrical surface. Inner collar stays in the groove. Cup has recess accommodating the cartridge. Note here that dampers are arranged between cartridge outer surface and recess inner surface, as well as between outer collar outer face and recess wall, and between cartridge second face and pressure ring.

EFFECT: better anti-vibration protection, reduced noise.

2 dwg