Operating Principle:
Common medium-pressure fans are centrifugal fans, with the impeller covered by a mechanical casing and the center of the impeller serving as the intake. When 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. Under the action of centrifugal force, the gas is expelled from the exhaust port along the impeller channel.
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 they are also known as radial flow centrifugal fans.
Technical Parameters: Among the technical specifications of medium-pressure fans, the most important factors to consider during selection are gas flow rate, pressure, power transmission, efficiency, and impeller speed. The gas flow rate parameter of a medium-pressure fan represents the volume of gas the fan can handle in a unit of time, while the pressure of a medium-pressure fan refers to the internal gas pressure during its operation.
The efficiency of medium-pressure fans refers to the ratio of the shaft power to the actual effective power of the gas being processed. The full 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 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 sorting of grains; wind tunnel air supply and air cushion ship inflation and propulsion, etc.
