Operating Principle:
Common medium-pressure fans are centrifugal fans, with the impeller covered by a mechanical casing and the inlet at the center of the impeller. As the medium-pressure fan operates, the power unit drives the impeller to rotate, drawing air into the inlet. During the rotation of the centrifugal fan blades, a dynamic force is exerted on the gas, increasing its pressure and speed. The gas is then expelled from the exhaust port along the impeller channels due to 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 blowers, gases are typically treated as incompressible fluids. The gas processing of medium-pressure blowers is always completed within the same radial plane, hence the medium-pressure blowers are also known as radial flow centrifugal blowers.
Technical Parameters: Among the technical specifications of medium-pressure fans, the most important ones to consider during the selection process include gas flow rate, pressure, power output, efficiency, and impeller speed. The gas flow rate of a medium-pressure fan represents the volume of gas the fan can handle per unit time, while the pressure refers to the internal gas pressure within the fan 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 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 sources, air cushion ship inflation and propulsion, etc.
