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Structural difference between centrifugal fan and axial fan

Update:18-07-2019
Summary:

Centrifugal fans are generally composed of an impeller, […]

Centrifugal fans are generally composed of an impeller, a casing, a coupling, and a shaft. The impeller mainly generates wind pressure and transmits energy; the casing is responsible for introducing and discharging gas; the coupling is used to connect the motor and the fan; the shaft is responsible for fixing the impeller.

The axial flow fan is mainly composed of a hub, a blade, a shaft, a casing, a wind collector, a streamline body, a rectifier, and a diffuser. The wind collector and the streamline body constitute an air inlet, the impeller is composed of a hub and a blade, and the impeller and the shaft form a rotor supported on the bearing.

Difference between centrifugal fan and axial fan

1. The direction of exhausting the two is different.

The air inlet and the air outlet of the axial flow fan are on a parallel line, so the exhaust direction of the axial flow fan is straight in the direction of the axis. The exhaust direction of the centrifugal fan is perpendicular to the air inlet, so the exhaust direction of the centrifugal fan is 360°.

2. Energy consumption and effect are different.

The axial flow fan cools slowly, the cooling effect is outstanding, the unit energy consumption is low, the ventilation opportunity is easy to grasp, and it is not easy to show fogging. Centrifugal fans have significant cooling and precipitation effects, short ventilation time, high unit energy consumption, and poor fogging opportunities.

3. The difficulty of the device is different.

The axial flow fan is usually directly connected to the wall or may be connected to the air duct, so the device is relatively simple. The device of the centrifugal fan is relatively complicated.

4. The motor connection method is different.

The motor of the axial flow fan is generally installed in the body of the fan, and the motor of the centrifugal fan is connected by the shaft, and is generally externally disposed outside the fan shaft.

5, the appearance is different.

The axial flow fan is generally cylindrical, and the centrifugal fan is generally snail-shaped.

6, the wind pressure is different.

The air flow pressure of the axial flow fan is relatively small, basically no wind pressure; the air volume of the centrifugal fan is relatively large. If the pipeline resistance is large and the pumping wind is far apart, it is recommended to use a centrifugal fan.

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