Industrial centrifugal fans are common industrial equipment that accelerate gas through high-speed rotating impellers, then decelerate and change the flow direction to convert kinetic energy into potential energy, thereby achieving gas transportation and pressurization.


The following is a detailed introduction to industrial centrifugal fans:

Working Principle

Industrial centrifugal fans operate on the principle of converting kinetic energy into potential energy. They use high-speed rotating impellers to accelerate gas, then decelerate and change the flow direction to convert kinetic energy into potential energy (pressure). In a single-stage centrifugal fan, gas enters the impeller axially, changes to a radial direction as it flows through the impeller, and then enters the diffuser. In the diffuser, the change in flow direction causes deceleration, converting kinetic energy into pressure energy. Pressure increase primarily occurs in the impeller, followed by the diffusion process. In multi-stage centrifugal fans, a return guide vane directs the airflow into the next stage impeller to generate higher pressure.

Structural Components

- Impeller: The core component of the centrifugal fan, consisting of blades, front disc, rear disc, etc. The shape and angle of the blades significantly impact the fan's performance.

- Casing: Typically made of steel plate, it houses the impeller and other components and guides the airflow.

- Inlet: Used to draw gas into the fan.

- Outlet: Used to discharge the pressurized gas from the fan.

- Transmission Device: Includes motor, coupling, pulley, etc., used to transfer power from the motor to the impeller.

- Bearings and Sealing Devices: Used to support the impeller and prevent gas leakage.

Performance Parameters

- Airflow: Refers to the volume of gas transported by the fan per unit of time, usually measured in cubic meters per hour (m3/h).

- Pressure: Refers to the pressure generated by the fan during gas transportation, usually measured in Pascals (Pa).

- Power: Refers to the electrical power consumed by the fan during operation, usually measured in kilowatts (kW).

- Speed: Refers to the number of revolutions per minute of the fan impeller, usually measured in revolutions per minute (r/min).

- Efficiency: Refers to the ratio of the electrical power consumed by the fan during operation to the effective power produced, usually expressed as a percentage (%).

Application Areas

Industrial centrifugal fans are widely used in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings for ventilation, dust removal, and cooling; ventilation and induced draft for boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and conveying of grains; wind tunnel wind sources and inflation and propulsion of air cushion vehicles.