Time of issue:2021-04-22 20:56:29

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The overall performance of the fan blade and the structure analysis of the annular multi-stage blade

The new fan blade can make the mold processing easier, reduce the manufacturing cost, change from the original multi-slider combination demoulding to the front and back direct demoulding, the multi-slider combination has poor processing accuracy, difficult tolerance matching, and high manufacturing difficulty. New structure There is no multi-slider combination for the fan blade, the mold is composed of two parts, the mold is more stable, and the cost is reduced. The manufacturing difficulty is lowered, but the product precision is improved.

How does the shape of the fan blade affect the air volume of the fan?

There are motor power, fan blade angle, fan speed, etc. in electromechanical equipment. If it is a mine fan, the downhole factors include changes in mine resistance, whether the air path has been adjusted, increase the resistance, and the fan will return to reduce the total air volume. But the general impact is not great.

Let's analyze the reasons why the speed of the DC cooling fan slows down

With the continuous improvement of people’s living standards, the application of DC cooling fan blades has become more and more extensive, have you noticed that sometimes it becomes slower and slower when in use? Don’t worry, the following article will simply share DC for everyone The reason why the speed of the cooling fan blades slows down.

Why do you want to reduce the noise of the fan blades?

The principle of energy-saving and noise-reducing fan The fan can be separated into two types: the core type and the axial type according to the principle. When the centrifugal fan rotates, the centrifugal force generated will throw the air between the blades to the outer edge of the impeller. Therefore, at the outlet of the outer edge of the fan impeller Pressure is formed at the place where the airflow changes in the direction of movement. At the same time, a large vortex is generated between the blades. Also, due to the improper matching of the shape of the wind cover and the fan, the airflow forms a local vortex in the outer cover, so the efficiency is only 20-30 %, the general wind consumption is about the motor capacity.

The function of axial fan blades and the calculation method of angular spacing

The improved axial flow fan blade can effectively overcome the shortcomings of the prior art, is convenient for stacking, prevents collision, and achieves the purpose of convenient packaging, transportation and storage. The fan blade includes a hub, a blade and a middle plate located in the hub.

How to calculate the air volume of the cooling fan required by the product?

Standard air: humid air with a temperature of 20℃, atmospheric pressure of 760mmHg and a humidity of 65% is standard air. At this time, the weight of air per unit volume (also known as specific weight) is 1200g/M*3

Features of DC fan

When the noise problem during the operation of traditional AC fans is solved, major manufacturers have gradually changed the motors of electric fans to DC motors. DC fans are not only more energy-efficient, but also enable the fans to be continuously variable. Even in the middle of the night, the electric fan can still keep quiet. Most of the DC fans use high-efficiency permanent magnet drive shafts. After power-on, the fan blades are driven by the principle of electromagnetic effect, which greatly reduces the frictional kinetic energy consumption during the operation of the fan. This also makes the noise emitted by the DC fan very low, the power consumption is only one-third of the traditional AC fan, and the number of air volume adjustment sections is also larger.

What should be considered when choosing a DC fan?

Choose a good brand of DC fan, which is often overlooked by users when choosing. Many inferior brands of fans will produce a lot of noise due to severe bearing wear after using them for a period of time, which not only affects the service life of the fans, but also upsets you during use. Therefore, it is recommended that you choose high-quality branded products.

How to judge the cooling characteristics of the cooling fan?

When it comes to the characteristics of cooling fans, if you have a little understanding of cooling fans, you should know some. The choice of cooling fan can be selected from main parameters such as bearing, air volume, air pressure, size and so on. So, how to judge the performance of the cooling fan

What's wrong with choosing a good cooling fan?

Some people think that only imported cooling fans can meet the requirements of static removal. In fact, many domestic cooling fan manufacturers have quite mature technology and can compete with imported fans. Some have been working for many years and will not lag behind imported products in technology. They also have advantages in price, and the price/performance ratio will be much higher.
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