How to choose a DC axial fan？

DC axial fans are very versatile, that is, the airflow in the same direction as the axis of the blades, such as electric fans, air conditioners, and external fans are fans that operate in axial flow. A DC axial fan refers to a fan that rotates the DC motor to drive the fan wheel to rotate by inputting DC power, thereby realizing the conversion process of DC power to mechanical energy.

●Working principle of axial fan

●Application of axial fan

●Selection method of axial fan

Working principle of axial fan

When the impeller rotates, the gas enters the impeller axially from the air inlet, and is pushed by the blades on the impeller to increase the energy of the gas, and then flows into the guide vanes. The guide vane changes the deflected airflow into an axial flow, and at the same time introduces the gas into the diffuser tube, further converts the kinetic energy of the gas into pressure energy, and finally introduces it into the working pipeline.

The blades of DC axial fans work similarly to the wings of an airplane. However, the latter applies to lift upwards on the wings and supports the weight of the aircraft, while the DC axial fans fixe  the position and move the air.

The cross-section of a DC axial fan is generally a wing section. The blade can be fixed in position, or it can rotate around its longitudinal axis. The angle between the blades and the airflow or the distance between the blades may not be adjustable or adjustable. Changing the blade angle or pitch is one of the main advantages of DC axial fans. A small blade pitch angle produces a lower flow rate while increasing the pitch can produce a higher flow rate.

Application of axial fan

It can be used for ventilation or heat dissipation in places such as metallurgy, chemical industry, light industry, food, medical equipment, mechanical equipment, and civil buildings. If the casing is removed, it can also be used as a free DC axial fan, or in a longer exhaust, the interval in the pipeline is installed in series to increase the wind pressure in the pipeline.

Selection method of axial fan

When selecting a DC axial fan, first, according to the two basic parameters of the required DC axial fan's air volume and total pressure, the DC axial fans model and machine number can be determined through the DC axial fan's dimensional performance table. At this time, more than one product may meet the requirements; then Combining fan purpose, process requirements, use occasions, etc., select the type, model, and structural materials of the DC axial fans to meet the required working conditions, and strive to make the rated flow and pressure of the DC axial fans as close as possible to the flow and pressure required by the process. When the DC axial fan is running, the operating point is close to the high-efficiency area of the DC axial fans characteristics. When selecting, it is necessary to consider the structure of the system pipeline and the system resistance to match the internal characteristics of the DC axial fans; if the system resistance is large and the structure size is small, the centrifugal DC axial fans should be selected; on the contrary, if the system resistance is small, the structure size is large, It is necessary to choose an DC axial fans; because the low pressure generated by the DC axial fans is enough to overcome the resistance of the system, it can discharge a large amount of air.

Dongguan Xingdong Electronics Co., Ltd has developed a variety of different DC axial fans and conducted a lot of tests before leaving the factory to ensure the quality. If you are in the wind turbine business, you can consider using our cost-effective products.