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. The gas is then discharged through the exhaust outlet along the impeller channels under the action of centrifugal force.

During operation, although the rotation of the impeller in a medium-pressure blower increases the pressure and velocity of the gas, the various changes in the gas are relatively small. Therefore, in the design and operation of centrifugal blowers, the gas is typically treated as an incompressible fluid. The gas handling process of a medium-pressure blower is always completed within the same radial plane, hence the medium-pressure blower is also known as an axial-flow centrifugal blower.

Technical Parameters: In the technical specifications of medium-pressure fans, the most important factors to consider during selection include 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 process in a unit of time, while the pressure refers to the internal gas pressure value during the operation of the medium-pressure 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 that 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; air tunnel air sources, and inflation and propulsion for air cushion vessels.