axial flow fan

Axial flow fan, with airflow flowing along the axis of the impeller, high flow rate, low pressure head, compact structure, and easy installation. Widely used for factory ventilation, cooling towers, air coolers, tunnels, dust removal exhaust, kiln cooling, and explosion-proof exhaust. Divided into ordinary axial flow, anti-corrosion axial flow, explosion-proof axial flow, high-temperature axial flow, and adjustable blade axial flow.

1、 Classification and Process Application

1. The ordinary fixed axial flow fan (T35-11) provides ventilation for factory buildings, workshops, and warehouses, with clean air at room temperature and the highest cost-effectiveness.

2. Adjustable blade axial flow fan (large industrial model) shutdown/online adjustment of blade angle to change air volume and pressure; Cooling towers, air-cooled islands, and large kilns have good energy-saving effects.

3. The high-temperature axial flow fan (W-T35) can transport 200-400 ℃ high-temperature flue gas, for kiln cooling, fire exhaust, and hot air in heat treatment furnaces.

4. Explosion proof axial flow fan (BT35) for paint room, lithium battery workshop, gas environment, conveying flammable and explosive gases, equipped with explosion-proof motor, anti-static.

5. Fiberglass anti-corrosion axial flow fan (FT35) is resistant to acid and alkali waste gas from pickling and electroplating workshops, and is also resistant to water vapor corrosion.

Compared to centrifugal fans: high axial airflow and low pressure; Suitable for exhaust scenarios with short pipelines and low resistance; The working conditions with many bends and high resistance in the pipeline are not suitable for axial flow, and centrifugal flow should be selected.

2、 Whole machine structure

Wind duct (body)+hub+blades+motor+bracket

Blade: cast aluminum/steel plate/fiberglass; Large industrial aircraft with wing shaped blades, high aerodynamic efficiency and low noise

Duct: Carbon steel, fiberglass, stainless steel are optional to reduce airflow backflow loss

Motor: Built in motor (conventional); The high-temperature version adopts an external motor, which is driven through a transmission shaft to avoid high-temperature smoke. The accessories include a protective net, shock-absorbing pad, muffler, and manual/electric actuator (adjustable blade version)

3、 Core Features

1. High flow and low pressure, with a much larger air supply per unit volume than centrifugal fans

2. Simple structure, small size, can be wall mounted or directly installed in pipelines, occupying little space

3. Adjustable blade model, changing the blade angle can adjust performance and adapt to changes in working conditions

4. It can be made into multiple versions for explosion-proof, anti-corrosion, and high temperature resistance, with a wide range of applicable scenarios

5. Disadvantage: When the resistance of the pipeline increases, the air volume decreases significantly; Low upper pressure limit, not suitable for long pipelines and high resistance systems

4、 Applicable scenarios

Ventilation and air exchange in the factory building, cooling towers, air cooling equipment, tunnel ventilation, fire smoke exhaust, kiln emergency cooling, sewage treatment workshop exhaust, and explosion-proof ventilation in the paint spraying room.

5、 Material selection

Room temperature ventilation: carbon steel cylinder+cast aluminum blades

Acid and alkali corrosion exhaust gas: FRP cylinder made of fiberglass reinforced plastic and blades made of fiberglass reinforced plastic

Wet and clean working conditions: 304 stainless steel cylinder body+stainless steel blades

High temperature condition: heat-resistant cast aluminum blades

6、 Key parameters for selection

1. Airflow and total pressure (emphasis: pipe network resistance should not be too high)

2. Medium temperature

3. Media: Clean air/Water vapor/Acid alkali gas/Combustible vapor

4. Do you need adjustable blades and explosion-proof features

5. Installation form: pipeline type, wall type, post air supply

7、 Installation points

1. Try to use straight pipe sections for imports and exports, and reduce bends. Bends will significantly increase resistance and reduce air volume

2. Install protective nets for imports and exports to prevent debris from getting caught in the blades

3. Install rubber shock absorbers on the base to reduce vibration and noise

4. High temperature models use an external transmission structure to prevent the motor from overheating and burning out

5. Explosion proof models are reliably grounded and have static bridging

8、 Common faults

1. The resistance of the pipeline network is too high, and the actual air volume is much lower than the nameplate air volume

2. Leaves accumulate dust and attachments, causing imbalance, increased vibration, and noise

3. Blade collision and deformation, resulting in decreased aerodynamic performance

4. The built-in motor overheats under high temperature conditions and burns out

5. Aging and cracking of fiberglass blades