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 into the intake. During the rotation of the centrifugal fan blades, they exert dynamic force on the gas, increasing its pressure and velocity, and the gas is discharged from the exhaust outlet along the impeller channels under the action of centrifugal force.

During operation, although the rotation of the impeller increases 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 usually treated as an incompressible fluid. The gas treatment process of medium-pressure fans is completed within the same radial plane, hence the medium-pressure fans are also known as radial flow centrifugal fans.

Technical Specifications: In the technical parameters of medium-pressure fans, the most important factors to consider are gas flow rate, pressure, power transmission, efficiency, and impeller speed, all of which are crucial during the selection process. The gas flow rate parameter of medium-pressure fans represents the volume of gas that the fan can process per unit time, while the pressure of medium-pressure fans refers to the internal gas pressure value during the operation of the 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 it processes. The full pressure efficiency of centrifugal fans is approximately 90%, and in the future development of centrifugal fans, efficiency values will be one of the goals researchers continue to pursue.

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