what is a centrifugal fan
Centrifugal fan is a ventilation, ventilation or air supply equipment designed and manufactured based on Euler's theorem (Euler's equation) and the law of conservation of mass. It is a fan that uses the kinetic energy of the rotor to increase the gas pressure, or uses the kinetic energy of the inlet speed to correspondingly reduce the static pressure to reach a certain air volume.
Centrifugal fans are not only widely used in industrial and civil buildings in air conditioning, environmental protection, refrigeration, heating, drying and other fields, but also have important applications in transportation, mining, metallurgy, energy and other fields. Its main functions are: increasing air pressure, flow, forming airflow, etc.
The centrifugal fan is mainly composed of a motor, volute, impeller, air inlet and outlet, pipe opening, centrifuge oil plug, inlet air chamber and other components. Among them, the motor is powered by a power supply to drive the impeller to rotate; the impeller is the core part of the centrifugal fan. Its speed, impeller outer diameter, blade angle and other factors will affect the gas flow and wind pressure of the centrifugal fan. At the same time, the material of the impeller also affects the use of the centrifugal fan. Lifespan and reliability are greatly affected.
The function of the volute is to convert the kinetic energy of rotation into static heat energy, thereby increasing the air pressure; the air inlet and outlet are used to introduce and discharge gas; the pipe opening is used for pipe connection to facilitate gas transportation; the centrifuge oil plug is used to lubricate the centrifuge bearings to reduce wear; the inlet air chamber is used to increase the inlet kinetic energy and eliminate the difference in upper and lower wind speeds.
Working principle
The working principle of the centrifugal fan is to drive the impeller to rotate at high speed with the drive motor, causing the inlet gas to generate kinetic energy and pressure, thereby causing the outlet gas to have wind pressure and air flow. During the rotation of the fan, the state of the fluid under centrifugal force changes. Since the pressure at the inlet end is lower than the outlet end, the fluid will be introduced into the fan from the inlet end, flow along the axis of the impeller, and then be pushed around the impeller by centrifugal force. flow, the air pressure also increases, and is finally discharged through the outlet to achieve ventilation, smoke exhaust, air exchange and other purposes.
Features
1.Generate greater air volume and pressure: Because the centrifugal fan adopts centrifugal force in physical principles, it can produce greater air volume and pressure, thereby achieving more effective ventilation and exhaust.
2.Simple structure: Compared with other ventilation equipment, the centrifugal fan has a very simple structure and is very convenient to use and maintain.
3.Various models: There are many models of centrifugal fans to meet the needs of different occasions, such as: single suction centrifugal fan, double suction centrifugal fan.