Centrifugal Fan Rotor Group For High Pressure Centrifugal Blower Impeller Wheel

Centrifugal Fan Rotor Group For High Pressure Centrifugal Blower Impeller Wheel

The centrifugal fan rotor group is the core rotating component of a centrifugal fan for gas transportation and energy conversion. It converts mechanical energy into the kinetic and pressure energy of gas through high - speed rotation. Its performance directly determines the efficiency, stability, and service life of the fan. The following is a detailed analysis from multiple dimensions:

- Core components and material characteristics
- Impeller: As the core working part, the shape and layout of its blades directly affect the aerodynamic performance. Forward - curved blades are suitable for low - pressure and large - flow conditions. Backward - curved blades are known for high efficiency and energy - saving. Radial blades have a simple structure and strong wear resistance, and are often used in dusty environments. The impeller materials vary significantly according to application scenarios. Common carbon steel (such as Q235) has a low cost and is suitable for normal - temperature clean air. Stainless steel (such as 304, 316) is corrosion - resistant and is often used in the chemical and food industries. High - temperature alloys (such as nickel - based alloys) can withstand temperatures above 800°C, meeting the requirements of industrial furnaces and boiler induced - draft fans. Fiberglass impellers are preferred in the waste gas treatment field due to their light weight and acid - alkali resistance.
- Main shaft: As a key shaft part for transmitting torque, it is usually forged from 45# high - quality carbon steel or 40Cr alloy steel. After quenching and tempering treatment, its comprehensive mechanical properties are improved. The surface can also be chrome - plated or nitrided to enhance wear resistance and fatigue strength. The accuracy requirements of the main shaft are extremely high. The errors of cylindricity and coaxiality need to be controlled at the micron level to avoid vibration during operation.
- Hub: It is a hub part connecting the blades and the main shaft. It is generally made of cast steel or ductile iron. It is fixed to the blades through precisely machined bolt holes and needs to have good structural rigidity and dynamic balance performance to prevent deformation during high - speed rotation.
- Classification and application scenarios
- Classified by structural form: It can be divided into open, semi - open, and closed rotor groups. The open rotor group consists only of blades and a hub and is suitable for working conditions with a large dust content, such as mine ventilation. The semi - open rotor group has a wheel disc on one side, with both certain efficiency and wear - resistance, and is often used in industrial dust removal. The closed rotor group consists of blades, a front disc, and a rear disc, with the highest efficiency, and is widely used in clean gas transportation scenarios such as air - conditioning systems and industrial air supply.
- Classified by application field: In the industrial field, high - temperature rotor groups are used in boiler induced - draft fans in the metallurgy and power industries and need to withstand the scouring of high - temperature flue gas. Explosion - proof rotor groups use special explosion - proof materials and structural designs and are suitable for flammable and explosive environments such as petrochemical and coal mine gas emissions. In the civil field, low - noise rotor groups meet the silent requirements of commercial building ventilation and household air purification through optimized blade curves and dynamic balance processes.
- Technical parameters and maintenance points
- The performance parameters of the rotor group include rated speed, critical speed, dynamic balance grade, etc. High - speed rotor groups (such as high - speed turbo fans) have strict requirements for bearing accuracy and lubrication systems. The dynamic balance grade directly affects the operation stability and usually needs to reach above G2.5 to ensure that the vibration value is controlled within a safe range.
- In terms of maintenance, it is necessary to regularly check the wear of the impeller, the run - out of the main shaft, and the tightening of the hub bolts. For dusty working conditions, anti - wear treatment (such as surfacing a wear - resistant layer) is also required for the impeller, and parameters such as vibration and temperature need to be monitored in real - time through an online monitoring system to prevent equipment failures caused by rotor imbalance.

Through precise structural design, diverse material selection, and targeted technical optimization, the centrifugal fan rotor group undertakes an indispensable gas power transmission task in industrial production, environmental governance, and people's livelihood security fields."

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Key Features 

• Product as drawing.
• Customized
• Diameter :400-3500mm. 
• Material:Carton steel Q345, Staliness steel, Aluminium.Cast iron, bronze, stainless steel, manganese bronze, Monel, INCONEL, and non-metallic materials.Non-metallic material composition: PPS plastic, phenolic resin and so on
• Special Treatment: Wear-resisting processing, Surfacing welding processing.