When the air between the blades of the centrifugal fan rotates, it is subjected to centrifugal force to obtain kinetic energy (dynamic head) and is discharged from the periphery of the impeller, and is guided by the volute-shaped casing to flow to the outlet of the fan, thus in the center of the impeller. Negative pressure is formed, so that the external airflow continuously flows in and supplements, so that the fan can discharge the gas.
The motor transmits power to the fan impeller through the shaft. The rotation of the impeller transmits energy to the air. The air generates centrifugal force under the action of rotation. The air spreads around the blades of the fan impeller. At this time, the larger the fan impeller, the energy received by the air. The larger is, the greater the pressure head (wind pressure) of the fan is. If the large impeller is cut smaller, the air volume will not be affected, but the air pressure will only be reduced.
The air extraction efficiency of a centrifugal fan directly affects the air volume of the fan. Under normal circumstances, the air extraction efficiency of the fan is directly related to the economic cost of our users. Therefore, in terms of improving the air extraction efficiency of the fan, it is often What our users care about. To improve the use effect of the fan, you must know what the key factors affecting the fan are, and making targeted adjustments is the kingly way. Now I will introduce two ways to improve the suction efficiency of centrifugal fans.
First of all, for centrifugal fans, the convexity of the partition is directly related to the air extraction efficiency of the fan. Due to the convexity of the partition, the air flow field will be irregular, making the air extraction effect poor. Changing the shape of the suction baffle and adopting the layout is helpful to improve the suction efficiency of the centrifugal fan, and this is also a widely used method.
Secondly, the air extraction efficiency of the centrifugal fan will also be affected by other factors such as the outside world. In a stable air flow field, the stability of the air extraction efficiency of the fan can be well maintained. Once the circumferential uniformity and radial uniformity are damaged It may arouse the phenomenon of stall and isotactic flow of the fan.
Although these methods can improve the air extraction efficiency of centrifugal fans, they are not suitable for all fans. Therefore, you still have to choose the way to improve the fan based on your own actual situation and location restrictions.