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. As 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 expelled from the exhaust port along the air passage under the action of centrifugal force.

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

Technical Specifications: Among the technical parameters of medium-pressure fans, the most important ones are gas flow rate, pressure, power transmitted, efficiency, and impeller speed, all of which must be paid attention to during the selection process. The gas flow rate parameter of medium-pressure fans represents the volume of gas that the fan can process in a unit of time, while the pressure of medium-pressure fans refers to the internal gas pressure value during the operation of the fan.

The efficiency of medium-pressure fans refers to the ratio between the shaft power of the fans 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 boilers 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 air cushion ships.