AXIAL-FLOW FAN Russian patent published in 2003 - IPC

FIELD: aeronautical engineering and rocketry. SUBSTANCE: invention can be used in temperature control systems. Proposed axial-flow fan has cylindrical housing, inner diameter D, bushing, outer diameter d, installed in housing and accommodating electric motor, and impeller installed on shaft. It has also n (n=3, 4, etc) bosses of length L installed between housing. Axes of bosses are square to axis of fan, and outer surface of bosses is made with cylindrical diameter D. On bushing, in places of its contact with bosses, n sections with spherical surfaces, radius r, are made, and inner surface of each boss is made in form of section of spherical surface, radius r, in contact with corresponding section of spherical surface of bushing. Special members to adjust axial position of bosses are introduced into fan. Each section of spherical surface is made with convex surface pointed to bushing, and their centers are located on circumference, diameter . EFFECT: improved manufacturability. 3 cl, 2 dwg