AXIAL-FLOW FAN Russian patent published in 2004 - IPC

FIELD: mechanical engineering; fans and ventilators. SUBSTANCE: invention can be used in main ventilation plants of mines and underground railways. Proposed axial-flow fan contains housing with rotor and impeller installed in housing on radial and radial-bearing supports and secured by bolts cantilever to flange of rotor shaft out of the limits of bearing supports from side opposite to location of electric motor. Rotor shaft has extension after flange of which slider of impeller blade turning mechanism is installed through sliding key joint. Slider axial displacement drive is located in fan fairing which is connected with manifold by means of guide vanes. EFFECT: reduced cost and improved reliability of axial-flow fans owing to increased repairability of impeller. 2 cl, 2 dwg