What Is An Axial Flow Fan?

1. Introduction to the axial flow fan
Axial flow fan, as the name suggests, is a kind of ventilation equipment with the wind flow direction parallel to the fan axis. It works by converting electricity into wind energy, accelerating the gas through rotating blades, thus achieving ventilation, dust removal and cooling.
Axial flow fan has the characteristics of simple structure, small volume, large air volume, low noise and high efficiency, and is widely used in factories, mines, tunnels, cooling towers, vehicles, ships and other places.
2. Structure and working principle of the axial flow fan
1. Structural composition
Axial flow fan is mainly composed of impeller, casing, air inlet, motor and other parts.
(1) Impeller: the impeller is the core part of the axial flow fan, composed of blades and hub. The blade is usually front curved, rear curved or radial type, the materials are steel, aluminum alloy, glass reinforced plastic, etc.
(2) Case: the case is used to fix the impeller and the motor, and to protect it at the same time. Shell materials are steel, FRP, plastic and so on.
(3) Air inlet: the air inlet is located in front of the impeller and is used to guide the gas into the impeller.
(4) Motor: the motor is the power source of the axial flow fan and drives the impeller to rotate.

2. How it works
When the axial flow fan works, the motor drives the impeller to rotate, and the gas flow is accelerated under the action of the impeller. The impeller converts the kinetic energy of the gas into pressure energy, which increases the gas pressure in the casing, and then exits from the air outlet. Because the gas flow direction at the impeller is parallel to the axis, so it is called the axial flow fan.
3. Classification and characteristics of the axial flow fan
1. Classification
According to the blade form, the axial flow fan can be divided into front bending type, rear bending type and radial type.
(1) Front bending type: the blade inlet corner is greater than 90 degrees, the air volume is large, but the efficiency is low, suitable for places with high air volume requirements.
(2) Rear bending type: the blade into the mouth is less than 90 degrees, high efficiency, but the air volume is relatively small, suitable for places with high wind pressure requirements.
(3) Radial type: the blade into the mouth is equal to 90 degrees, between the front type and the rear type, suitable for general ventilation places.
2. Features
(1) Simple structure: the axial flow fan has a compact structure, convenient installation and a small area.
(2) Large air volume: the axial flow fan has a large air volume, which is suitable for ventilation in large places.
(3) Low noise: made of high-quality materials, with low noise.
(4) High efficiency: the axial flow fan impeller is consistent with the gas flow direction, which reduces the gas flow loss and improves the efficiency.

4. Application field of axial flow fan
1. Industrial field: widely used in ventilation, dust removal and cooling in factories, mines, tunnels and other places.
2. Construction field: ventilation and air conditioning system used for buildings.
3. Transportation field: Ventilation and cooling of vehicles and ships.
4. Environmental protection field: used for waste gas treatment, air purification, etc.
5. Agriculture: used for ventilation and cooling in greenhouses and breeding farms.
5. epilogue
As an efficient and energy-saving ventilation equipment, the axial flow fan plays an important role in many fields in China. With the development of science and technology, the performance and quality of the axial flow fan will continue to improve, to bring more convenience to our life and work. Hope that through the introduction of this article, you can have a deeper understanding of the axial flow fan.