How to choosing a centrifugal fan?

The centrifugal fan is a device that relies on the input mechanical energy to increase the gas pressure and discharge the gas, which is a driven fluid machine. Centrifugal fans are widely used in the ventilation, dust removal and cooling process of various buildings such as factories, mines, tunnels, cooling towers, etc. Among them, the ventilation and drafting of boilers and industrial furnaces, air conditioning equipment, and household appliances. It is especially widely used in various operations such as cooling and ventilation.

1. Has good adjustability:

For the ventilation and dust removal network, the fan performance curve is required to be flat, but for the pneumatic conveying network, it is required to be steeper. Because the pneumatic conveying system is in the process of conveying materials, when the conveying volume changes, the network resistance will also change greatly. Only a centrifugal fan with a steep performance curve can achieve that when the resistance changes, the change in the air volume will not be large.

2. The work point should be in the high-efficiency area:

When choosing a centrifugal fan, first of all, it is necessary to choose whether the air volume and air pressure of the fan can meet the requirements of the wind network, and the working point should be set at the best efficiency or economical range, that is, the working point efficiency should not be less than 90% of the higher limit.

3. The centrifugal fan should be consistent with environmental protection, and the noise should be low:

In the same situation, choose low-noise machinery first. Generally speaking, the peak frequency of noise is proportional to the fan speed. Therefore, in the case of meeting the network pressure and flow requirements, try to use a low-speed centrifugal fan, and the general fan speed should not exceed 3000r/min.

4. The motor equipped with the centrifugal fan must not be overloaded:

Fans with backward-facing blades will not be overloaded due to the presence of larger roads at rated air volumes. For forward and radial blade fans, the power will increase with the increase of air volume, and it will rise in a straight line, and the increase rate will gradually accelerate. When the feed pipe is empty, otherwise the motor will be in danger of overloading.

5. Centrifugal fans can be adapted to convey gas:

When transporting gases of different properties, choose different types of fans. If the dust concentration in the air is very high, it is necessary to choose a dust exhaust fan with anti-wear blades and not easy to accumulate dust. If the fan is matched with the dryer, it is necessary to choose a centrifugal fan with high temperature resistance.

Dongguan Sanyue Precision Electromechanical Co., Ltd. is a technology-based enterprise focusing on the research and development, manufacturing, sales and after-sales service of various specifications of centrifugal fans, centrifugal fans, duct fans, high-pressure blowers and other series of pneumatic products. Passed CE\FCC\ROHS and other certifications, contact number: 0769-88811878.