The working principle of centrifugal fans is essentially the same as that of turbine compressors, both due to the low gas flow velocity. For high-temperature centrifugal fans, pressure changes are minimal, and it is generally unnecessary to consider the variation in gas specific volume, treating the gas as an incompressible fluid.

Axial fans can be manufactured in two types: right-hand and left-hand. When viewed from the motor side, with the impeller rotating clockwise, it is called a right-hand fan; with the impeller rotating counterclockwise, it is called a left-hand fan.

Centrifugal fans consist of the housing, main shaft, impeller, bearing transmission mechanism, and motor, etc.

Chassis: Made of steel plate for robust reliability, available in both whole and semi-open designs. The semi-open design is convenient for maintenance.

Impeller: Composed of blades, a curved front disk, and a flat rear disk.

Rotor: Should have static and dynamic balancing to ensure smooth rotation and good performance.

Transmission section: consists of a main shaft, bearing housing, rolling bearings, and belt pulleys (or couplings).

Centrifugal fans are mechanical devices that increase gas pressure and discharge gases by relying on input mechanical energy; they are a type of driven fluid machinery. Centrifugal fans are widely used in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings for ventilation, dust removal, and cooling; for boiler and industrial furnace ventilation and exhaust; in air conditioning and household appliance cooling and ventilation systems; for drying and selection of grains; as wind tunnel air sources and for inflating and propelling air cushion vessels; and more.

Purple Sun Air Conditioning Equipment Co., Ltd. specializes in the production of centrifugal fans, oblique flow fans, fire dampers, and other equipment. For more details, please consult us, and a dedicated staff member will assist you.

Centrifugal fans operate based on the principle of converting kinetic energy into potential energy. They accelerate gases using high-speed rotating blades, then decelerate and alter the flow direction, transforming kinetic energy into potential energy (pressure). In a single-stage centrifugal fan, gases enter the impeller axially, change to radial flow as they pass through the impeller, and then enter the diffuser. In the diffuser, the gas changes direction and the cross-sectional area of the pipe increases, slowing down the airflow. This deceleration converts kinetic energy into pressure energy. The pressure increase primarily occurs in the impeller, followed by the expansion process. In multi-stage centrifugal fans, a回流器 (回流器) is used to direct the airflow into the next impeller, generating higher pressure.

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