Operating 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 centrifugal fan blades, they impart dynamic force to the gas, increasing its pressure and velocity. The gas is then 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 of the gas are relatively small. Therefore, in the design and use of centrifugal fans, the gas is usually treated as an incompressible fluid. The gas treatment process of medium-pressure fans is 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 to consider are gas flow rate, pressure, power transmission, 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 handle within a 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 it processes. The full pressure efficiency of centrifugal fans is roughly around 90%, and in the future development of centrifugal fans, efficiency values will be one of the targets that 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; ventilation and exhaust for boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; grain drying and sorting; wind tunnel air supply and air cushion ship inflation and propulsion, etc.
