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 unit drives the impeller to rotate, drawing air in through the intake. During the rotation of the centrifugal fan blades, a dynamic force is exerted on the gas, increasing its pressure and velocity. Under the action of centrifugal force, the gas is discharged along the blade channel through the exhaust outlet.

During operation, although the impeller's rotation increases the pressure and velocity of the gas, the various changes in the gas are relatively small. Therefore, in the design and use of centrifugal blowers, the gas is typically treated as an incompressible fluid. The gas treatment process of medium-pressure blowers is always completed within the same radial plane, hence the medium-pressure blowers are also known as radial flow centrifugal blowers.

Technical Parameters: Among the technical specifications of medium-pressure fans, the most important ones to consider during the selection process include gas flow rate, pressure, power transmitted, efficiency, and impeller speed. 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 of a medium-pressure fan refers to the internal gas pressure during its operation.

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 researchers will further pursue.

Centrifugal fans are widely used for dust removal 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 home appliances; drying and selection of grains; air source for wind tunnels and inflation and propulsion for hovercrafts.