‍‍‍‍‍‍The explosion-proof centrifugal fan is based on the principle of converting kinetic energy into potential energy. It uses a high-speed rotating impeller to accelerate the gas, then slows down, changes the flow direction, and converts kinetic energy into potential energy. In a single-stage centrifugal fan, the gas enters the impeller from the axial direction. When the gas flows through the impeller, it changes to a radial direction, and then enters the diffuser. The gas changes the direction of movement and increases the cross-sectional area of ​​the pipe to decelerate the airflow. This deceleration effect will kinetic energy. Converted into pressure energy. The increase in pressure occurs first in the impeller, and secondly in the expansion process. In a multi-stage centrifugal fan, a refluxer is used to make the air flow into the next impeller, which produces a higher pressure effect.

‍‍The working principle of the explosion-proof centrifugal fan is basically the same as that of the turbo compressor, because the gas flow rate is low and the pressure changes little. Generally, there is no need to consider the change of the gas specific volume, that is, the gas is treated as a non-compressible fluid.

‍‍Explosion-proof centrifugal fans can be made into two types, right-handed and left-handed. Viewed from the side of the motor: the impeller rotates clockwise, which is called a right-rotating fan; the impeller rotates counterclockwise, which is called a left-rotating fan.‍‍

‍‍structure‍‍

‍‍The centrifugal fan is composed of a casing, a main shaft, an impeller, a bearing transmission mechanism and a motor.‍‍

‍‍Chassis: It is made of steel plate and is strong and reliable. It can be divided into integral type and semi-open type. The semi-open type is convenient for maintenance.‍‍

‍‍Impeller: It is composed of blades, curved front disc and flat back disc.‍‍

‍‍Rotor: static and dynamic balance should be done to ensure smooth rolling and outstanding functions.‍‍

‍‍Transmission part: It consists of main shaft, bearing box, rolling bearing and belt pulley.

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