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 impart dynamic force to the gas, increasing its pressure and velocity, and the gas is expelled through the exhaust port under the action of centrifugal force.

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: Among the technical parameters of medium-pressure fans, the most important factors to consider during selection are 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 process per unit time, while the pressure of a medium-pressure fan refers to the internal gas pressure value 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 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 that researchers will further pursue.

Centrifugal fans are widely used for dust and air exhaust, cooling, ventilation 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 home appliances; for drying and sorting grains; and for inflating and propelling air cushion vessels, wind tunnels, and more.