Working principle of turbo medium pressure blower
The working principle of the turbo medium pressure blower is similar to that of the centrifugal fan, except that the air compression process is usually carried out through several working impellers (or stages) under the action of centrifugal force. The blower has a rotor that rotates at a high speed. The blades on the rotor drive the air to move at a high speed. The centrifugal force makes the air flow to the fan outlet along the involute in the involute shaped casing. The high-speed air flow has a constant air pressure. The fresh air is replenished from the center of the casing.
The working principle of single stage turbo blower is that the prime mover drives the impeller to rotate at a high speed through the shaft. The air flow enters the high-speed rotating impeller from the inlet axial direction and then becomes radial flow, which is accelerated, and then enters the diffuser chamber to change the flow direction and decelerate. This decelerating effect converts the kinetic energy in the high-speed rotating air flow into pressure energy (potential energy), so that the fan outlet maintains a stable pressure.
Theoretically, the pressure flow characteristic curve of the turbo blower is a straight line, but due to the friction resistance and other losses inside the fan, the actual pressure and flow characteristic curve decreases with the increase of the flow: large and gentle, and the corresponding power flow curve of the centrifugal fan decreases with the increase of the flow rise. When the fan operates at a constant speed, the operating point of the fan will move along the pressure flow characteristic curve. The working point of the fan during operation depends not only on its own performance, but also on the characteristics of the system. When the resistance of the pipe network increases, the pipeline performance curve will become steeper. The basic principle of fan regulation is to obtain the required theory by changing the performance curve of the fan itself or the external pipe network characteristic curve.