Centrifugal fans are widely used in factories, mines, tunnels, ships and buildings to ventilate. They rely on the input of mechanical energy to increase the gas pressure and discharge the gas. It is a driven fluid machine. The centrifugal fan is divided into forward tilting centrifugal fan and backward tilting centrifugal fan. What is the difference between these two fans?

The difference between the so-called forward centrifugal fan and the backward tilt centrifugal fan is the size of the outlet angle of the fan blade. When the exit angle is greater than 90 degrees, it is called a forward tilt centrifugal fan, and when it is less than 90 degrees, it is called a backward tilt centrifugal fan. . When the size and speed of the centrifugal fan are the same, the larger the exit angle, the higher the pressure generated, so the forward pressure centrifugal fan has a greater total pressure than the backward tilt centrifugal fan. However, the forward pressure centrifugal fan's dynamic pressure accounted for a greater proportion of the total pressure, the airflow velocity is higher, and the loss is greater when converted to static pressure, so the efficiency is not as high as the backward tilt type.

The more common domestic forward-leaf multi-page centrifugal fan, because its impeller processing can be riveted in mass production, so it is cheap and therefore widely used, pay attention to some conditions that are not suitable for forward-tilt impeller, do not misuse this type of fan . Generally, most fan selections are recommended by manufacturers and distributors. The original fan selection has the biggest difference from the domestic fan selection. It is designed for customers to select the most suitable and most cost-effective imported fan. However, there are still many people who are not sure how to distinguish between good and bad centrifugal fans, so how should we usually distinguish?

The distinction between the quality of centrifugal fans is mainly based on whether the performance of the centrifugal fans conforms to the nominal air pressure and air volume. Only the nominal air volume and air pressure can achieve the pumping air volume required by the actual system. Whether the noise of the centrifugal fan is too large during operation, the noise is also environmental pollution, which not only affects work and life, but also brings other impacts to other people around, and also consumes energy. The efficiency of the centrifugal fan is high and power saving, while the low efficiency consumes power. Therefore, it is particularly important that the efficiency of the centrifugal fan is not high. Also, the higher the vibration value of the bearing part of the centrifugal fan, the more easily the fan bearing is damaged. The lower the vibration value, the longer the bearing life. Therefore, the vibration value of the centrifugal fan should also be paid attention to when selecting the model.

In addition to referring to the above selection requirements, attention should also be paid to the material quality of the fans. In addition to the quality assurance of imported fans, they can also provide customers with high-quality pre-sales and after-sales services. High-quality fan manufacturer, please choose XingChang Fan: https://www.chinaxcfan.com/