AXIAL-FLOW FAN AND METHOD OF ITS ASSEMBLY Russian patent published in 2001 - IPC

FIELD: manufacture of fans; temperature control system in aviation and rocketry. SUBSTANCE: axial-flow fan has housing with cylindrical bush, electric motor and impeller mounted inside it; it also includes boss fitted between housing and bush. End surfaces of each boss are made in the form of sections of torus; surfaces of housing and bush are provided with recesses at points of contact with torus surfaces; surfaces of recesses follow torus surfaces of bosses. Size of bosses along axis of fan is lesser than or equal to half-difference between diameters of inner surface of housing and outer surface of bush. During assembly of fan, bosses are turned to position at which size of bosses along axes perpendicular to fan axis is lesser than or equal to half-difference between diameters of inner surface of housing and outer surface of bush, after which centers of torus surfaces of bosses and recesses are matched and bosses are turned in equatorial planes of torus to position at which axes of bosses are perpendicular to fan axis and then electric motor and impeller are mounted. EFFECT: enhanced vibration strength and adaptability to manufacture. 3 cl, 5 dwg