Working Principle:

Common medium-pressure fans are centrifugal fans, with the impeller covered by a mechanical casing, and the center of the impeller being the intake. As the medium-pressure fan operates, the power unit drives the impeller to rotate, drawing air into the intake. During the rotation of the centrifugal fan blades, a dynamic force is exerted on the gas, increasing its pressure and speed, and the gas is discharged from the exhaust port 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 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 handling process of medium-pressure blowers is always completed within the same radial plane, hence they 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 transmission, efficiency, and impeller speed. The gas flow rate parameter of a medium-pressure fan represents the volume of gas the fan can process per unit time, while the pressure of a medium-pressure fan refers to the internal gas pressure during 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 handled. The total pressure efficiency of centrifugal fans is approximately 90%, and in the future development of centrifugal fans, the efficiency value will be one of the targets that researchers further pursue.

Medium-pressure 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 sorting grains; for wind tunnel air sources and air cushion ship inflation and propulsion, etc.