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Impeller of a centrifugal fan

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Product Description

The impeller of a centrifugal fan is its core component, responsible for generating air pressure and transmitting energy. The structure consists of the hub, blades, front disc, and rear disc. The hub fixes the impeller to the main shaft, rotating with it. The blades, typically numbering between 6 and 24, are crucial for energy conversion, with their shape, angle, and exit direction directly affecting the gas pressure increase and efficiency. The front disc, located on the air intake side of the impeller, is arc-shaped or conical, guiding the gas smoothly into the blade channel. The rear disc connects the blades to the hub, securing the blades and sealing the airflow.

Types and characteristics include forward-curved blades with an exit angle β2 greater than 90 degrees, providing high outlet air pressure but lower efficiency, prone to accumulating impurities and fouling, commonly used in areas requiring moderate airflow and high air pressure, such as 9-19 series and 9-26 series centrifugal fans. Radial blades have an exit angle β2 of 90 degrees, featuring simple structure and low production costs, with efficiency between forward and backward types, rarely used due to their tendency to foul, except in specific environments like mines. Backward-curved blades have an exit angle β2 less than 90 degrees, exhibiting excellent aerodynamic performance, high airflow, low pressure, and high efficiency up to 80-90%, widely used in industries, chemical plants, and power stations.

The working principle involves the impeller's high-speed rotation, where the blades push the gas to rotate, and under the effect of centrifugal force, the gas is thrown to the edge of the impeller, gaining kinetic and pressure energy, then entering the volute. Simultaneously, a negative pressure forms at the center of the impeller, drawing external air continuously to replenish it, thus achieving continuous gas conveyance.

Material selection for the impeller includes aluminum alloy, stainless steel, or cast iron, depending on the fan's application and gas characteristics. In corrosive gas environments, stainless steel is often chosen. For small low to medium-pressure fans, aluminum alloy casting is used to reduce weight.

Zibo Hongcheng Fan Co., Ltd. specializes in producing over 50 series of fans and more than 600 specifications and models, offering a complete range of specifications and models. Custom production and processing according to drawings are available. Welcome to contact us for cooperation.

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Products

Products

Which wind turbine manufacturer leads in innovation?

How are Chinese wind turbine manufacturers innovating?

How does a titanium fan benefit sustainability?

How do power plant fans drive sustainability?

How do centrifugal steel mill fans boost efficiency?

How is a fan drive shaft crucial for sustainability?

Impeller of a centrifugal fan

Description

marker

Product Description

contact us

Related popular products

Desulfurization fans

Dust removal centrifugal fans

High-temperature draft fans

An auxiliary combustion fan

Dual Inlet Centrifugal Fan

Roots blower

Stainless steel centrifugal fan

Boiler centrifugal induced draft fans

Roof axial fans

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

Titanium fans

Fan motor

Boiler centrifugal blowers

JK series of mine local exhaust fans

Coal gas booster fan

Mixed-flow fans

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