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[Do you know about heat dissipation] The role of blades for DC fans

Release time:

2019-05-27

The DC fan converts electrical energy into machinery through DC voltage and electromagnetic induction to drive the rotation of the fan blades. Therefore, the fan housing and blades are an essential whole. Most people know that these two parts are very important, so they What kind of role does it play? First, blade curvature: within a certain range, the greater the blade curvature, the greater the gas kinetic energy at the same speed, that is, the greater the air volume and wind pressure; at the same time, the greater the resistance of the blade, the greater the torque of the motor. Big. Second, the motor diameter: due to the existence of the motor and bearings, DC fan spindle in the central part of the inevitable no air flow

   DC FanThrough DC voltage and electromagnetic induction, electric energy is converted into machinery to drive the fan blades to rotate, so the fan shell and blades are an essential whole. Most people know that these two parts are very important, so between them What kind of role?
First, blade curvature: within a certain range, the greater the blade curvature, the greater the gas kinetic energy at the same speed, that is, the greater the air volume and wind pressure; at the same time, the greater the resistance of the blade, the greater the torque of the motor. Big.
Second, the motor diameter: due to the existence of the motor and bearings, the central part of the DC fan spindle will inevitably have no air flow through the blind area, the spindle diameter will determine the size of the blind area. The size of the spindle diameter depends mainly on the power of the fan motor-a high-power motor requires a larger stator winding coil, which will inevitably take up more space. In the case of not being able to expand vertically (increase the height), it has to expand horizontally (Increase the area).
Third, blade radian: in addition to having a certain curvature on the cross-section, the fan blade does not extend straight along the radial direction in the top view plane, but is slightly curved towards the direction of rotation, showing a certain radian. If the blades extend straight along the radial direction, the airflow driven by the rotation of the cooling fan will be scattered on the side of the air outlet, the air supply distance is short, and the "power" is not concentrated; If the current product version is slightly radian, it can ensure that the air flow is concentrated in the columnar space directly in front of the air outlet, increasing the air supply distance and air pressure.
Fourth, blade spacing: The distance between the blades is too small, it will cause airflow disturbance, increase the friction on the blade surface, and reduce the efficiency of the fan; if the distance between the blades is too large, it will increase the pressure loss and insufficient wind pressure.
Shenzhen Jiangshanlai Electronic Technology Co., Ltd. was founded in Shenzhen, China in 2005. It is a large-scale enterprise specializing in the customization, research and development, manufacturing, sales and service of DC brushless motors, DC cooling fans, DC brushless fans, DC bracket fans, supercharged cooling fans, micro cooling fans, DC cooling fans, DC blowers, and non-standard fans, DC fan wholesale manufacturers and DC fan suppliers. Products sell well in Guangdong, Shenzhen, Guangzhou, Dongguan, Fujian, Zhejiang, Jiangsu and other places.

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