what are centrifugal fans
What are centrifugal fans
- Centrifugal fan is a mechanical device that relies on mechanical energy to increase gas pressure and transport it out. It is widely used in various fields such as energy, environment, and aviation. It is one of the main energy-consuming equipment in industrial and agricultural production.
- The centrifugal fan is a type of impeller machinery. Its working principle is to form a negative pressure inside the fan through the rotation of the impeller, sucking in external air and expelling the fan through the impeller flow channel and volute. The centrifugal fan is mainly composed of casing, impeller, shaft, collector, exhaust port, bearing box, coupling, pulley and base.
what are centrifugal fans
Centrifugal fan working principle
- The core working principle of a centrifugal fan is to use a high-speed rotating impeller to accelerate the gas, and then convert the kinetic energy of the gas into pressure energy (potential energy) by decelerating and changing the flow direction. This process mainly occurs in single-stage centrifugal fans. The gas enters the impeller from the axial direction, changes to the radial direction when flowing through the impeller, and then enters the diffuser. In a diffuser, a change in the direction of gas flow causes deceleration, which converts the kinetic energy of the gas into pressure energy. The increase in pressure occurs mainly in the impeller, followed by the expansion process. In multi-stage centrifugal fans, a refluxer is used to direct the airflow into the next impeller, thereby generating higher pressure.
- The workflow of the centrifugal fan includes the following key steps:
- Gas entry: The airflow enters the blade space from the axial direction of the fan.
- Acceleration: Driven by the impeller, the gas rotates with the impeller and increases energy under the action of inertia.
- Centrifugal force action: The gas obtains centrifugal force driven by the impeller and leaves the impeller in the radial direction.
- Diffusion and deceleration: When gas enters the diffuser, the change in flow direction causes deceleration. This deceleration converts the kinetic energy of the gas into pressure energy.
- Exhaust gas: After passing through the diffuser, the gas is discharged from the fan and has a certain pressure.
- The structure of a centrifugal fan includes a casing, a main shaft, an impeller and other components. The impeller is the main component that generates wind pressure and transmits energy. The casing is used to introduce and discharge gas, and at the same time convert part of the kinetic energy of the gas into pressure energy.
what are centrifugal fans
Types of centrifugal fans
- The types of centrifugal fans mainly include the following: single-suction centrifugal fans, double-suction centrifugal fans, high-pressure centrifugal fans, static pressure box-type centrifugal fans and medium-pressure centrifugal fans. These types are suitable for a variety of different work environments and needs, depending on their structure and purpose.
- Single-suction centrifugal fan: Also known as front-suction centrifugal fan, it is suitable for transporting general gases and has a small air volume range.
- Double-suction centrifugal fan: Also known as rear-suction centrifugal fan, it can be used under conditions of high pressure, large air volume, and small starting torque.
- High-pressure centrifugal fan: Mainly used to transport high-pressure gas, such as blowers, compressors, etc.
- Static pressure box-type centrifugal fan: often used to eliminate noise and vibration during work and increase air volume and wind pressure.
- Medium pressure centrifugal fan: Suitable for transporting gases with high dust content, high flue gas temperature or condensation water, etc.
what are centrifugal fans
Centrifugal fan application
- Industrial Manufacturing: Centrifugal fans are used in many industrial environments, such as steel metallurgy, chemical industry, mining, etc. In these industries, fans are usually used to strengthen air supply, exhaust, refrigeration and hot air systems. Especially in harsh environments such as high temperature, corrosion, dust, etc., centrifugal fans play an irreplaceable role.
- Environmental protection equipment: Centrifugal fans are also widely used in environmental protection equipment, such as sewage treatment, exhaust gas purification, etc. At the same time, centrifugal fans also play an important role in dust removal equipment, incineration equipment and advanced physical noise reduction equipment.
- Construction equipment: In the construction field, centrifugal fans are used in air conditioning, ventilation, hot air and other fields. Through the air supply and exhaust system, they realize the circulation and flow of air and promote the convection and ventilation of indoor air.
- Temperature control: Centrifugal fans can change the ambient temperature by blowing air, so they have important uses in heating, ventilation, air conditioning, drying and other temperature regulation equipment.
- Air purification: In special environments such as laboratories, operating rooms and other places that have strict requirements on air quality, centrifugal fans can be used for air filtration and purification.
- Agricultural cultivation: In agricultural production, centrifugal fans are used to provide a stable air environment for greenhouse plant growth, animal feeding, etc.
- Transportation equipment: In transportation equipment such as trains and ships, centrifugal fans are also used for air circulation.
- Food Processing: In the food processing industry, centrifugal fans are also very commonly used, such as drying equipment, cooling equipment and other food processing technology equipment.
