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 equipment drives the impeller to rotate, drawing air into the intake. During the rotation of the fan blades, a dynamic force is applied to the gas, increasing its pressure and velocity. Under the action of centrifugal force, the gas is discharged along the exhaust port through the blade channel.

During operation, although the impeller's rotation 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 medium-pressure fans is completed within the same radial plane, hence they are also known as radial flow centrifugal fans.

Technical Parameters: In the technical specifications of medium-pressure fans, the most important factors to consider are gas flow rate, pressure, power transmitted, efficiency, and impeller speed, all of which are crucial during the selection process. The gas flow rate parameter of a medium-pressure fan represents the volume of gas the fan can process per unit of time, while the pressure of a medium-pressure fan refers to the internal gas pressure value 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 handled. 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 targets further pursued by researchers.

Centrifugal fans are widely used for dust extraction and cooling in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings; for ventilation and exhaust in boiler and industrial furnaces; cooling and ventilation in air conditioning and household appliances; grain drying and selection; wind tunnel air sources, air cushion ships' inflation, and propulsion, etc.