What is Fan Manufacturing?

What is Fan Manufacturing?
Fans are mechanical units designed for air transport in ducts, direct air supply or air evacuation from facilities. The air is moved due to the pressure drop between the fan inlet and outlet port.
An axial fan is in the form of an impeller with a cylindrical case, in which the impeller is fixed on a bushing at an angle to the plane of rotation. As the propeller blades rotate, the air is trapped and moved more axially. The air moves hardly in the radial direction. Axial fan blades are often located directly on the motor shaft.
Application: Air supply and air outlet through openings or max. 3 m air ducts with low air dynamic resistance in the system.
A mixed flow fan can move air along the motor shaft. Such fans are widely used in ventilation systems with round air ducts.
Things to Know About Fan Manufacturing
In-round fans are available in standard sizes ranging from 250 to 5200 m with air capacity range from 450 mm to 100 3 / h. Backward curved impellers are powered by asynchronous external rotor motors. Ball bearings are rated for long service life. The fan casing can be made of plastic, polymer coated or galvanized steel and has good corrosion resistant properties and a nice appearance.
Application: Air outlet and supply in long ventilation systems with high air dynamic resistance.
It consists of a centrifugal fan, an impeller and a scroll case. The propeller is a hollow cylinder with blades mounted inside, fixed circumferentially by disc plates. The hub used to mount the propeller to the shaft is located in the center of the reinforcement ring.

During propeller operation, air is trapped between the blades, compressed and moved from the center. Under the centrifugal force, the air is transported to the scroll housing and then to the exhaust pipe. Centrifugal fans are equipped with forward or backward curved blades. Back curved blades save up to 20% energy. Another important advantage of backward curved blades is their high air load capacity. Centrifugal fans with forward curved blades provide the same air capacity and pressure characteristics as backward curved blades, but require smaller impeller diameter and lower speed. Thus, they can achieve the desired result by demanding less space and producing less noise.