There are two main types of dust collection fans commonly in use today:
- Centrifugal Fans
- Axial-flow fans
Centrifugal Dust Collection Fans
Centrifugal fans consist of a wheel or a rotor mounted on a shaft that rotates in a scroll-shaped housing. Air enters at the eye of the rotor, makes a right-angle turn, and is forced through the blades of the rotor by centrifugal force into the scroll-shaped housing. The centrifugal force imparts static pressure to the air. The diverging shape of the scroll also converts a portion of the velocity pressure into static pressure.
Axial-Flow Dust Collection Fans
Axial-flow fans are used in systems that have low resistance levels. These fans move the air parallel to the fan’s axis of rotation. The screw-like action of the propellers moves the air in a straight-through parallel path, causing a helical flow pattern.
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