DC fan manufacturersI tell you, the specification for the landing test of the cooling fan is based on the specifications of the cooling fan of different sizes, and the landing height is 30-50CM. The specification for the landing test is: three boards with a thickness of 10CM are placed on each side, and the fan is not damaged. Some products do the landing test, and the request is more severe. For example, the cooling fan is installed in the product, landing is 100CM, and the cooling fan cannot be damaged.

In particular, some products are heavy in weight and fall to the ground faster. Some products are not square and conical. Therefore, the sharp end of the landing after landing has all the stress points concentrated in one point, and the heat dissipation fan is easier to destroy. For products with high landing request, the heat dissipation fan cannot use commonly used PBT materials. It is suggested to use better materials, such as PC materials or PPS materials, with better toughness.

The landing test ensures that the DC fan belongs to the motor series and is a high-speed rotating electronic product. During the operation, various abnormal changes may be found along with it, such as non-rotation, abnormal noise (that is, noise often used), slow rotation and other phenomena. The easiest and most controversial problem of the DC fan is noise. What is the reason?

When choosing a DC fan, the bearing is very important. Among them, the oil bearing type DC fan is most likely to present noise. The bearing cost is low and the bearing precision is low. It mainly depends on the smooth function of grease to maintain a quiet running sound. When high temperature, dust and other interference on grease, the DC fan gradually presents abnormal sound.

Some manufacturers choose outdated or second-hand ball bearings. With the extension of time, the life of the second-hand balls is at the edge. After running for a period of time, noise gradually comes out. It is also normal for the process consumption of DC fans, such as whether the oily fan is designed with floating blades, whether the shaft core is cleaned when assembling, whether the ball bearings are squeezed and deformed, whether sweat contacts the balls to form rust, etc, all may form DC fan presenting noise.
The above is the DC fan manufacturer's summary of the floor test specification for the fan. For more information, please consult our official website!