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Axial fans are very versatile, that is, the airflow in the same direction as the axis of the blades, such as electric fans, air conditioner fans are fans that operate in axial flow mode. It is called "axial flow" because the gas flows parallel to the fan axis. Axial fans are usually used on occasions with higher flow requirements and lower pressure requirements. The axial fan fixes the position and moves the air. The axial flow fan is mainly composed of the fan impeller and the casing. The structure is simple but the data requirements are very high.
Ordinary axial flow fans can be used for ventilation in general factories, warehouses, offices, houses, etc., and can also be used for air coolers (air coolers), evaporators, condensers, spray droplets, etc., and there are also mine shafts. Flow fan, anti-corrosion, explosion-proof axial flow fan adopts anti-corrosion materials and explosion-proof measures and is matched with explosion-proof motors, which can be used to transport explosive, volatile, and corrosive gases.
It is required that the gas conveyed by the axial flow fan should be free of significant dust, viscous and fibrous materials; the temperature of the direct-connected motor should not exceed 40 ℃, and the temperature of the belt drive type should not exceed 60 ℃. The amount of dust in the conveying gas shall not exceed 150mg/m3. The axial flow fan is mainly composed of impeller, casing, motor and other parts, and the bracket is connected with the casing air duct by means of steel. The impeller and casing of the anti-corrosion axial flow fan are made of glass fiber reinforced plastic, and other axial flow fans are generally made of steel plates.
When the impeller rotates, the gas enters the impeller axially from the air inlet, is pushed by the blades on the impeller to increase the energy of the gas, and then flows into the guide vane. 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 an axial flow fan 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 axial flow fan fixes the position and moves the air.
The cross-section of an 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 axial fans. A small blade pitch angle produces a lower flow rate while increasing the pitch can produce a higher flow rate.
Advanced axial flow fans can change the blade pitch while the fan is running (this is quite similar to a helicopter rotor), thereby changing the flow accordingly. This is called an adjustable moving blade (VP) axial flow fan.
Hangzhou Jinjiu Electric Co., Ltd. is an Axial Fan Manufacturer and also has External Rotor Axial Fans and other products. Welcome to visit our official website.