Working Principle:

Common medium-pressure fans are centrifugal fans, with the impeller covered by a mechanical casing and the inlet at the center of the impeller. As the medium-pressure fan operates, the power unit drives the impeller to rotate, drawing air in through the inlet. During the rotation of the centrifugal fan blades, they exert a dynamic force on the gas, increasing its pressure and speed, and the gas is discharged from the exhaust port along the blade channel 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 are relatively small. Therefore, in the design and use of centrifugal fans, the gas is typically treated as an incompressible fluid. The gas processing of medium-pressure fans is all completed within the same radial plane, hence the medium-pressure fans are also known as radial flow centrifugal fans.

Technical Parameters: In the technical specifications of medium-pressure fans, the most important factors include gas flow rate, pressure, power transmission, efficiency, and impeller speed, all of which are crucial to consider during the selection process. The gas flow rate parameter of a medium-pressure fan represents the volume of gas that the fan can process per 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 continue to pursue.

Medium-pressure fans are widely used for dust extraction 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; and for inflating and propelling air cushion boats, etc.