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Centrifugal Fan How To Adjust The Air Volume

Wuxi JN Fan Co.,Ltd | Updated: Nov 02, 2017

Fan in the centrifugal fan of this kind, because it is one of the important products and key keywords, so in the attitude of learning, we must pay attention to, and in the degree of learning, it is necessary to do a comprehensive and specific, This is the case.

1. Centrifugal fan and blower, are these two comparable?

Centrifugal fans and blowers, these two are not comparable, because it is for two different categories of categories, so it is impossible to compare. Centrifugal fans, which are classified according to the principle of operation of the fan, thus obtaining a specific type, and the blower, which is a fan according to the use of characteristics to be classified, to get a specific species

2. Centrifugal fan suction, how to measure? In addition, 4-72-14c centrifugal fan with 45kw motor, the speed can reach how much?

Centrifugal fan suction, in general, is through the fan full pressure, to be measured. And 4-72-14c centrifugal fan with 45kw motor, its speed, it can reach 830r / min, if the normal operation and use, there is no problem. So, on the centrifugal fan, regulate the operation and use, it is possible to achieve a good state.

3. Centrifugal fan can not be exposed without resistance to run, come to the conclusion of this reason, what is it?

Centrifugal fans can not be exposed without resistance to run, come to this conclusion the specific reason is because:

Centrifugal fan, its outlet or inlet is closed when its load is very small, so its current is not very large. So, will require the closure of the throttle to the air, so that you can have a small starting current, on the contrary, the starting current will be great, so there will be a certain risk. And, prone to load tripping and other issues, so, will have the above conclusion.

How to adjust the air flow and rectifier action

1. Centrifugal fan, how is it to distinguish between right and wrong direction?

Centrifugal fan This kind of fan, the distinction between its left and right, in fact, very simple, as long as the fan from the back of the motor to see if it is clockwise rotation, if it is, then right, and vice versa is left. As for the angle of its judgment, such as 45 degrees or 90 degrees, it is to see the wind direction of the wind toward the angle, is the angle with the scale, is the same.

2. Stand-alone centrifugal fan is used to change the amount of air or the amount of air to adjust, rather than through the frequency adjustment?

This is because, in the centrifugal fan, the outlet pressure and the square of the speed, is the inverse relationship. So, when its speed is 75%, its outlet pressure is about half of the rated, so for some occasions, is not suitable, can not be sent to the air. The use of imported air valve or outlet valve, you will not have this problem, but also have the role of energy conservation.

3. Centrifugal fan, the inlet on the rectifier, what role?

Centrifugal fan, the inlet on the rectifier cylinder, mainly to play the role of guidance and rectification of these two. If there is no such part on the fan, then it will affect the actual flow of air flow area, and the actual flow of the fan. Therefore, it is necessary to have this part, in order to enhance the fan pressure and ensure the flow. However, this centrifugal fan of the annex, in a small fan, there may be no.


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