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Axial Fan Installation Matters

Sep 04, 2017

Axial fan, the use of a very wide range, that is, with the fan axis of the same direction of the air, such as fans, air conditioning fan is the way the fan running fan. It is called "axial flow" because the gas flows parallel to the fan shaft. Axial fans are usually used in situations where the flow rate is high and the pressure is low. The axial fan is fixed and moves the air. Axial fans are mainly composed of fan impellers and housings. The structure is simple but the data is very high.

working principle

When the impeller rotates, the gas enters the impeller from the air inlet in the axial direction, and the energy of the gas is raised by the pushing of the blade on the impeller and then flows into the guide vane. The guide vanes change the deflected airflow into axial flow and introduce the gas into the diffuser tube, further converting the kinetic energy of the gas into pressure energy, and finally introducing the working line.

Axial fan blades work in much the same way as aircraft wings. However, the latter is to lift the lift on the wing and support the weight of the aircraft, while the axial fan is fixed position and the air to move.

The cross-section of an axial fan is generally a wing profile. The blade may be fixed in position or rotatable about its longitudinal axis. The angle of the blade and the air flow or the spacing of the blades can be adjustable or adjustable. Changing the blade angle or spacing is one of the main advantages of axial fans. The small blade spacing angle produces a lower flow rate, while increasing the pitch can produce a higher flow rate.

The advanced axial fan can change the blade pitch (which is quite similar to the helicopter rotor) while the fan is running, thereby changing the flow accordingly. This is called an adjustable blade (VP) axial fan.


Axial fans, also known as local fans, is commonly used in industrial and mining enterprises a fan, but different from the general fan of its motor and fan are in a cylinder, the shape is a cylindrical, for local ventilation, easy installation, Ventilation effect is obvious, safe, you can connect the wind blower to the designated area.

Energy-saving transformation: the axial flow fan at the start, the motor current will be 5-6 times higher than the rated, not only will affect the motor life and consume more power system in the design of the motor selection will leave a certain The speed of the motor is fixed, but in the actual use of the process, sometimes to lower or higher speed operation, so the frequency conversion is very necessary. The inverter can realize the soft start of the motor, change the input voltage frequency of the equipment to achieve the purpose of energy saving and speed regulation, and can provide over-current, overvoltage and overload protection to the equipment.

Installation matters

1, the fan lying to install the damper through the coupling bolts fixed to the fan base, with the center of the high adjustment pad to adjust the level of each shock absorber, with a fixed bolt to the machine has been welded on the basis of the connection plate , Such as the fan due to earthquake and other reasons without shock absorber, then the fan seat on the screw hole and the embedded bolts can be directly connected.

2, side wall installation of the basic requirements of the installation of the same fan and lying installation, but the installation bracket made of inclined arm support, the bracket should have sufficient strength and stiffness, 10 # or more fans should not use this installation The

3, hanging installation first shock absorber and fan bolts connected into one, shock absorber symmetrical installation, arranged on both sides of the fan center of gravity, directly to the fan to insert into the suspension bracket, hanging bracket height, depending on the actual space distance Customized by the user, more than 16 # fan generally do not use this type of installation.

4, vertical installation fan vertical installation method and lying-style installation of the same, the strength of the fan base and stiffness requirements more stringent.

5, the fan and the two ends of the pipeline connection must be flexible joints to isolate the vibration and protection of the fan.