CENTRIFUGAL FAN IMPELLER Russian patent published in 2009 - IPC F04D29/28 

FIELD: heating systems, ventilation systems.

SUBSTANCE: invention refers to fan engineering and can be used when cooling grain material. Centrifugal fan impeller is installed in a casing made in the form of a perforated connection. Impeller is a tore with guides (5) arranged thereon. Longitudinal and cross sections of the guides are made in the form of circular arc. On guides' ends there installed are blades tilted in rotation direction, which are located in turn as to length: short one - long one. When impeller rotates, blades take with their edges an air flow entering through holes of connection. Then the air flows via the guides to the impeller's centre and to the outlet in axial direction to be further processed.

EFFECT: increasing capacity and reducing energy consumption when cooling grain material.

2 dwg