What is the basic principle of an axial fan?
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.
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.
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 an axial fan. The small blade spacing angle produces a lower flow rate, while increasing the pitch produces a higher flow rate.
The flow fan blades work in much the same way as the wings of an airplane. However, the latter is the lifting force on the wing and support the weight of the aircraft, while the axial fan is fixed position and the air to move.
When the impeller rotates, the gas enters the impeller from the inlet of the air inlet and is pushed by the blade on the impeller to raise the energy of the gas and then into the guide vane
