Operating Principle:

Common medium-pressure fans are centrifugal fans, with the impeller covered by a mechanical casing, and the center of the impeller serving as the intake. When the medium-pressure fan operates, the power equipment drives the impeller to rotate, drawing air in through the intake. As the blades of the centrifugal fan rotate, they impart dynamic force to the gas, increasing its pressure and velocity. Under the action of centrifugal force, the gas is expelled along the blade channels through the exhaust outlet.

During operation, although the rotation of the impeller in a medium-pressure fan enhances the pressure and velocity of the gas, the various change amounts of the gas are relatively small. Therefore, in the design and use of centrifugal fans, the gas is typically treated as an incompressible fluid. The gas treatment process of medium-pressure fans is always completed within the same radial plane, hence they are also known as radial flow centrifugal fans.

Technical Parameters: Among the technical parameters of medium-pressure fans, the most important factors to consider during selection are gas flow rate, pressure, power transmission, efficiency, and impeller speed. These are all critical aspects to pay attention to. The gas flow rate parameter of a medium-pressure fan represents the volume of gas the fan can handle within a unit of time, while the pressure refers to the internal gas pressure value during the operation of the medium-pressure fan.

The efficiency of a medium-pressure fan refers to the ratio between the shaft power of the fan and the effective power of the actual gas being processed. The total pressure efficiency of centrifugal fans is approximately 90%, and in the future development of centrifugal fans, efficiency values will be one of the goals that researchers continue to pursue.

Centrifugal fans are widely used for dust removal and cooling in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings; for ventilation and exhaust in boiler and industrial furnaces; for cooling and ventilation in air conditioning equipment and household appliances; for drying and conveying grains; and for inflation and propulsion of wind tunnels and hovercrafts.