Operating Principle:

Common medium-pressure fans are centrifugal fans, with the impeller covered by a mechanical casing and the intake port located 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 intake port. During rotation, the blades of the centrifugal fan exert dynamic force on the gas, increasing its pressure and velocity, and the gas is discharged along the air passage from the exhaust port 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 fans, the gas is typically treated as an incompressible fluid. The gas processing of medium-pressure fans is always completed within the same radial plane, hence the medium-pressure fans are also known as radial flow centrifugal fans.

Technical Parameters: Among the technical parameters of medium-pressure fans, the most important ones are gas flow rate, pressure, power transmission, 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 per 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 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.

Medium-pressure fans are widely used for dust extraction and cooling in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings; ventilation and exhaust in boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selection of grains; wind tunnel air sources and air cushion ships for inflation and propulsion, etc.