The centrifugal fan is a kind of mechanical energy, which is driven by the mechanical energy, which can increase the gas pressure by inputting the mechanical energy. Centrifugal fan is widely used in factories, mines, tunnels, cooling towers, vehicles, ships and buildings ventilation, row dust and cooling; industrial boilers and furnaces and ventilation fan; air conditioning equipment and household appliances in the cooling and ventilation; grain drying and sending; wind tunnel wind source and the hovercraft inflated and propulsion.
Centrifugal fan is mainly composed of: impeller, casing, shaft coupling, shaft. Impeller is the wind pressure is generated and energy transfer of main work parts; housing mainly used to introduce gas and exhaust gas, while the gas part of kinetic energy into pressure energy; coupling used to connect the motor and fan, transmission torque, shaft is installed and fixed impeller, with the motor through a coupling.
Gas between the blade of centrifugal fan impeller rotation by the centrifugal force in the obtained kinetic energy (pressure head) discharged from the perimeter of the impeller, through the volute shaped shell guide to to the fan outlet flow, so as to form a negative pressure in the position of the center of the impeller, to continuous inflow complement with the external air source, so that the function of the wind exhaust gas.
