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Operation flow and Protection function of Axial Fan

Jul 10, 2018

After the axial flow fan has been assembled, it will be effectively debugged by its technical personnel before it leaves the factory. Well, in addition to the key points of debugging such as the motor, the fan blade is also one of the key points that must be debugged and checked. Is the angle of the fan blade and the rotation stable or not? Whether there is a collision with the fan's inner wall is also something we must pay attention to. So the quality of every accessory in a good fan is very important.

In the process of using the axial flow fan, it is necessary to adopt as economic and good adjustment methods as possible. It is necessary to introduce advanced technology to open a large, efficient and energy-saving axial flow fan. When the axial flow fan starts, the current of the motor will be 5-6 times higher than the rated rating. It will not only affect the service life of the motor, but also consume more electricity.

In the design of axial fan system, some allowance will be left in the selection of motor, and the speed of motor is fixed, but in the process of practical use, sometimes it has to run at a lower or higher speed. Therefore, it is very necessary to transform the frequency conversion. The inverter can realize the soft start of the motor, achieve the purpose of energy saving and speed regulation by changing the input voltage frequency of the equipment, and can provide protection functions for the equipment such as overcurrent, overvoltage, overload and so on.


Axial fan operation flow

1. When the impeller rotates, the gas enters the impeller from the inlet axial direction, which is pushed by the blade on the impeller to increase the energy of the gas, and then flows into the guide vane.

2. The guide vane transforms the deflected air flow into axial flow and introduces the gas into the diffuser tube to convert the kinetic energy of the gas into the pressure energy. Finally, the blade can be fixed in position or rotated around its longitudinal axis.

3. One of the main advantages of axial fan is to change the angle or spacing of the blade.

4. Low flow rate is produced by small blade spacing angle, but higher flow rate can be obtained by increasing blade spacing.