Axial fans are simple in design, cheap and easy to maintain; they are favoured in many industries for these reasons.
This 3D model shows all major components associated with a typical axial fan, these include:
- Fan Blades
- Electric Motor
This is a 3D model of an Axial Fan.
3D Model Annotations
An electric motor is used to rotate the impeller. Three phase variable frequency drive motors are typical for this type of application.
The fan casing surrounds the blades. The clearance between the fan blades and casing should be minimal in order to reduce air leakage past the blade tips; this helps the fan maintain high efficiency.
Fan Blades and Hub
The fan blades are attached to the fan hub, and the hub is connected via a key to the shaft. The geometry and number of fan blades defines the operating characteristics of the fan. Generally, axial fans are suitable for high flow, low resistance applications.
Modern axial fans can control their speed and reverse direction using a variable speed frequency drive. This gives operators much greater control over how much air is delivered, and if the fan should act as a forced or induced draft fan.