What do we need to know about the basics of cooling fan motors.clip fan Factory

　　Cooling fans are now widely used in our lives. Many of the machinery we use will install cooling fans to ensure that the machinery can discharge the heat generated during operation in time and ensure the normal operation of the machinery. The most important structure in the cooling fan is the cooling fan motor, so what do we need to know about the cooling fan motor? Let's introduce it to you.

　　(1), the number of leaves

　　CPU fans usually have between 6 and 12 blades. Generally speaking, a smaller number of blades is likely to generate larger wind pressure, but the operating noise is also larger; while a larger number of blades is just the opposite.

　　(2) Blade shape

　　There are sickle type, trapezoid and AVC patented flange type, etc. Relatively speaking, the sickle-shaped fan blade is relatively stable and quiet during operation, but the wind pressure that can be generated is also small; the trapezoidal fan blade is easy to generate a large wind pressure, but the noise is also larger. The flanged type is the best design and can generate high wind pressure while maintaining low noise, but it is currently only used in AVC's own products. At present, the design of the sickle type is more seen.

　　The excellent design of the fan page can generate a large output air volume and air pressure at a low fan speed, and at the same time, it will not produce too much wind noise. In addition to the shape, the angle of the blade inclination is also very important, and it should be designed according to the characteristics of the motor and the needs of the heat sink. Otherwise, simply pursuing a large blade inclination angle may lead to the situation of high wind noise and small wind force.

　　(3) Fan motor bearing

　　At present, the bearings used in fan motors mainly include oil seal bearings (Sleeve), single ball bearings (1Ball+1Sleeve), double ball bearings (2 Ball Bearing), hydraulic bearings (Hydraulic), magnetic suspension (Magnetic Bearing), vaporized bearings (VAPO Bearing) and fluid protection system bearings (Hypro Bearing).

　　They all have their own advantages and disadvantages, and of course the price is also quite different. Compared with the oil-sealed bearings, single-ball bearings and double-ball bearings that we come into contact with every day, in terms of noise: double-ball bearings>single-ball bearings>oil-sealed bearings, but the service life is just the opposite. When the fan of the oil-sealed bearing is relatively new, the noise is very small, but after a long time of use, the lubricating oil dries up, fails or is lost, the bearing lubricity decreases, the rotational resistance increases, the noise of the motor will gradually increase, and the speed will also decrease. will decrease. Fans with double ball bearings remain virtually unchanged. The latter types of bearings are all newly adopted technologies. Although the advantages are quite obvious, manufacturing difficulties and higher prices have become the main factors restricting their popularity.

　　In summary, through the introduction, we can understand some basic knowledge of cooling fan motors. The cooling fan motor is very important for the cooling fan. The research on the cooling fan motor is of great significance to the performance improvement of the cooling fan. We need to know more about the cooling fan motor.

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