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Impeller action of centrifugal fan

1. Overview
Centrifugal Fan is a kind of ventilation, ventilation or air supply equipment designed and manufactured according to 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 velocity to correspondingly reduce the static pressure to reach a certain amount of air.
Centrifugal fans are not only widely used in industrial and civil buildings in the fields of air conditioning, environmental protection, refrigeration, heating, drying, etc., but also have important applications in transportation, mining, metallurgy, energy and other fields. Its main function is: increase the air pressure, flow, formation of air flow and so on.
Step 2: Structure
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 the power supply to drive the impeller to rotate; The impeller is the core part of the centrifugal fan, its speed, impeller outside diameter and blade Angle and other factors will affect the centrifugal fan gas flow and wind pressure, while the impeller material also has a great impact on the service life and reliability of the centrifugal fan.
The function of the volute is to convert the kinetic energy of rotation into static energy and heat energy, thereby increasing the air pressure; Air inlet and outlet for the introduction and discharge of gas; The pipe distribution port is used for pipeline connection to facilitate gas transmission; Centrifuge oil plug is used to lubricate the bearing of the centrifuge and reduce wear; The inlet air chamber is used to increase the inlet kinetic energy and eliminate the difference in wind speed.
The most common types of centrifugal fans are single suction centrifugal fans, double suction centrifugal fans, centrifugal fans with guide vane, centrifugal fans without guide vane, oblique flow centrifugal fans, centrifugal fans and centrifugal fans.
3. How it works
The working principle of the centrifugal fan is to drive the motor to drive the impeller to rotate at high speed, so that the imported gas generates kinetic energy and pressure, resulting in the export gas has wind pressure and airflow. In the rotation of the fan, the state of the fluid under the centrifugal force changes, because the pressure at the inlet end is lower than the outlet end, the flow will be introduced into the fan from the inlet end, and flow along the axis line of the impeller, and then pushed by the centrifugal force to flow around the impeller, while the air pressure also increases, and finally discharged through the outlet to achieve ventilation, smoke exhaust, air exchange and other purposes.
Step 4: Features
1. Produce greater air volume and pressure: Because the centrifugal fan adopts the centrifugal force in the physical principle, it can produce greater air volume and pressure, so as to achieve more effective ventilation and exhaust.
2. Simple structure: Compared with other ventilation equipment, the structure of the centrifugal fan is very simple, and the use and maintenance are very convenient.
3. Various models: There are various models of centrifugal fans, which can meet the needs of different occasions, such as: single suction centrifugal fan, double suction centrifugal fan

Post time: Sep-14-2023