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Axial flow fans

These fans are suitable for ventilation and air exchange in general factories, warehouses, offices, residential buildings, and can also be used in building air conditioning systems, ventilation duct systems, etc., to help regulate indoor air temperature, humidity, and air quality.

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Product Description

Axial flow fans generally come in models such as T30/T35/T40/SF/DT types. These fans are suitable for ventilation and air exchange in general factories, warehouses, offices, residential buildings, and can also be used in building air conditioning systems, ventilation duct systems, etc., to help regulate indoor air temperature, humidity, and air quality. They are also applicable for cooling and heat dissipation in equipment such as evaporative coolers, evaporators, condensers, transformer cooling, data center cooling, by directing cold air to the surface of the equipment to remove heat generated during operation, ensuring normal operation of the equipment.

By application: This includes explosion-proof axial flow fans, corrosion-resistant axial flow fans, sidewall axial flow fans, high-temperature axial flow fans, and ordinary axial flow fans.

Common materials for axial flow fans: carbon steel, stainless steel, fiberglass, aluminum alloy.

Axial flow fan structure

Axial flow fans mainly consist of: impeller, casing, motor.

The impeller: The most critical component of an axial flow fan, primarily composed of blades and hub. Blades are typically twisted wing-shaped, and the connection between blades and hub must ensure that the blade installation angle can be adjusted within a certain range. The outer diameter, hub ratio, number of blades, impeller structure, and blade shape significantly affect the performance of the fan.

Impeller of axial flow fan

Guide vanes: Depending on the relative position of the impeller and guide vanes, they are classified as pre-guide vanes, mid-guide vanes, and post-guide vanes. Their function is to determine the direction of fluid flow before or after passing through the impeller, reducing energy loss in fluid flow. Post-guide vanes can convert the dynamic pressure of the rotating speed at the impeller outlet into pressure energy. If pre-guide vanes are designed to be rotatable, it can enhance the ability of the axial flow fan to change operating conditions.

Performance characteristics

High flow rate, low head: Compared to centrifugal fans, axial flow fans can transport large volumes of gas but generate relatively lower pressure, making them suitable for places requiring high-volume ventilation and air exchange.

Higher efficiency: Under design conditions, axial flow fans can achieve higher efficiency, effectively converting mechanical energy from the motor into kinetic and pressure energy of the gas.

Special pressure performance curve: The right side of the pressure performance curve of an axial flow fan is steep, while the left side is saddle-shaped, indicating unstable working zones. Operating in these unstable zones may result in airflow pulsation and surge phenomena.

Rotation stall phenomenon: When the blade angle increases to a certain extent, vortices form near the trailing edge of the blade, causing airflow separation from the upper surface of the blade, which affects the performance and stability of the fan.

Classification methods

By arrangement form: Fixed type, position type, duct type.

By generated wind pressure: Divided into low-pressure fans (total pressure of the fan less than 500 Pa) and high-pressure fans (total pressure of the fan greater than or equal to 500 Pa).

By size: Small low-pressure axial flow fans, usually installed on walls or ceilings of buildings; large high-pressure axial flow fans, consisting of components such as impeller, casing, and drive mechanism.

Adjustment methods

Vane adjustment: By changing the angle of the fan blades, the performance curve of the fan changes, altering the operating point of the fan to adjust airflow, which is economically and safely effective.

Variable speed adjustment: The most economical method, but requires a variable frequency drive or hydraulic coupling.

Inlet guide vane adjustment: System resistance remains unchanged, airflow varies with changes in the fan's characteristic curve, but the operating point of the fan tends to enter unstable working areas.

Airflow range: 500-65000 m³/h

Total pressure range: 50-400 Pa

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Products

Products

How do fan shafts impact industrial efficiency?

How do blowers advance environmental protection?

How do high-temp gas fans improve industrial efficiency?

How are corrosive gas fans innovating sustainability?

What’s the role of induced draft fan furnaces?

What’s the role of induced draft fan furnaces?

Axial flow fans

Description

marker

Product Description

Axial flow fan structure

Performance characteristics

Classification methods

Adjustment methods

contact us

Related popular products

Anti-corrosion centrifugal fans

Anti-corrosion axial flow fans

Titanium fans

Desulfurization fans

FBCDZ coal mine main ventilator

Roof axial fans

Wear-resistant centrifugal fans

Multi-stage centrifugal blower

Jet fans

Dust removal centrifugal fans

High-temperature draft fans

High-pressure centrifugal blowers

Roots blower

Impeller of a centrifugal fan

K and DK series of mine energy-saving axial flow fans

FBD series (dⅠ) explosion-proof pressure-injection counter-rotating axial flow local ventilation fan

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