According to the principle of converting kinetic energy into potential energy, the high speed rotating impeller is used to accelerate the gas, then decelerate and change the flow direction, so that the kinetic energy can be converted into potential energy (pressure). In a single-stage centrifugal fan, the gas enters the impeller from the axial direction, and then changes into a radial direction when the gas flows through the impeller, and then enters the diffuser. In the diffuser, the gas changes the flow direction and the cross section area of the pipeline increases and slows down the airflow, which converts kinetic energy into pressure energy. The pressure increase mainly occurs in the impeller, followed by the pressure expansion process. In the multistage centrifugal fan, the air flow is used to enter the next impeller, resulting in higher pressure.
Structure of centrifugal fan for power station
The centrifugal fan is composed of a casing, a main shaft, an impeller, a bearing transmission mechanism and a motor.
The shell: made of steel plate is firm and reliable, can be divided into integral and semi-open type, and the semi-open type is convenient for maintenance.
Impeller: composed of blade, curved front disk and plate rear disk.
Rotor: should do static balance and dynamic balance to ensure smooth rotation and good performance.
The transmission part is composed of main shaft, bearing box, rolling bearing and pulley (or coupling).www.jnblower.com