What Is a Fan Shaft?

The bearing type refers to the bearing type used in the air-cooled radiator fan. In mechanical engineering, there are many types of bearings, but there are only a few of them used in radiator products: sleeve bearings using sliding friction and ball bearings using rolling friction, and a mixture of two bearing types. In recent years, major new radiator technology introduced by major radiator manufacturers, such as magnetic bearings, water wave bearings, magnetic core bearings, Raffle bearings, etc. have also been modified from the above basic form of bearings, the operating principle remains unchanged. . Oil-containing bearings and ball bearings are mainly used on ordinary air-cooled radiators.

Fan bearing

The bearing type refers to the bearing type used in the air-cooled radiator fan. In mechanical engineering, there are many types of bearings, but there are only a few of them used in radiator products: sleeve bearings using sliding friction and ball bearings using rolling friction, and a mixture of two bearing types. In recent years, major new radiator technology introduced by major radiator manufacturers, such as magnetic bearings, water wave bearings, magnetic core bearings, Raffle bearings, etc. have also been modified from the above basic form of bearings, the operating principle remains unchanged. . Oil-containing bearings and ball bearings are mainly used on ordinary air-cooled radiators.

Chinese name

Use of bearings

The bearing type refers to the bearing type used in the air-cooled radiator fan. In mechanical engineering, there are many types of bearings, but there are only a few of them used in radiator products: sleeve bearings using sliding friction and ball bearings using rolling friction.

The bearing type refers to the bearing type used in the air-cooled radiator fan. In mechanical engineering, there are many types of bearings, but the types of bearings used in radiator products are classified according to their basic working principles. There are only three types of bearings: sleeve bearings that use sliding friction and those that use rolling friction. Ball bearing (Ball Bearing) and two types of bearing mix these three. In recent years, new technologies introduced by major radiator manufacturers in bearings, such as magnetic bearings, fluid protection system bearings, hydraulic bearings, Raffle bearings, nano-ceramic bearings, etc., have also been improved from these basic bearing forms. The basic working principle remains unchanged.

Oil-bearing bearings (Sleeve Bearing) are sleeve bearings that use sliding friction, using lubricating oil as a lubricant and drag reducing agent. In the initial use, the running noise is low, and the manufacturing cost is also low. Great gap. And this kind of bearing has been used for a long time. Because of the oil seal (it is impossible for computer radiator products to use high-grade oil seals, which is usually ordinary paper oil seals), the lubricating oil will gradually evaporate, and dust will enter the bearings, causing the fan Problems such as slower speed and increased noise can also cause severe vibration due to eccentricity of the fan due to bearing wear. When these phenomena occur, either the oil seal is opened for refueling, or only the purchase of a new fan is eliminated.

Single Ball Bearing (1 Ball + 1 Sleeve Bearing) is an improvement on traditional oil-bearing bearings. It adopts a combination of sliding friction and rolling friction. In fact, it is to use a ball bearing and an oil-containing bearing to reduce the cost of double ball bearings. The rotor and the stator are lubricated with balls, and are equipped with lubricating oil. It overcomes the problems of short life and unstable operation of oil-containing bearings, and the cost increase is extremely limited. The single ball bearing absorbs the advantages of the oil bearing and the double ball bearing, and the service life of the bearing is increased to 40,000 hours. The disadvantage is that after the ball is added, the operating noise is increased, but it is still smaller than the double ball bearing.

2 ball bearings (2 Ball Bearings) are relatively high-end bearings. They adopt rolling friction. Two ball bearings are used. There are several tiny steel balls around the axis in the bearing. When the fan leaf or the axis rotates, the steel balls will rotate. . Because they are all spheres, the friction is small and there is no problem of oil leakage. The advantages of double ball bearings are long life, about 50000-100000 hours; good anti-aging performance, suitable for fans with higher speeds. Disadvantages of double ball bearings are high manufacturing costs and maximum noise at the same speed level. Double ball bearings and hydraulic bearings have better sealing performance, especially double ball bearings. The double ball bearing is completely embedded in the fan, and the rotating part has no direct contact with the outside world. In a sealed environment, the working environment of the bearing is relatively stable. Therefore, almost all large-diameter fans at the 5,000-rpm level use double ball bearings.

The representative manufacturer of Rifle Bearing technology is CoolerMaster. At present, CoolerMaster has upgraded most of its traditional oil-bearing fans to Raffle Bearings. As an improvement of traditional oil-containing bearings, Raffles bearings are made of wear-resistant materials and made of high-oil hollow bearings, which reduces the friction between the bearing and the shaft core. Raffles bearings also have shaft cores with reverse spiral grooves and oil retaining grooves. When the fan is running, the oil will form a backflow, so as to avoid oil loss, thus increasing the bearing life. Raffle bearing fans adopt the above structure and parts, which greatly improves the oil and oil retention capacity and reduces noise.

Fluid protection system bearing (Hypro Bearing) Its name comes from HY (Hydrodynamic wave, flow

Hydraulic Bearing (Hydraulic Bearing) is a technology pioneered by AVC, which is an improvement on the basis of oil-containing bearings. Hydraulic bearings have a larger oil storage space than oil-containing bearings and have a unique loop-type oil supply circuit. The working noise of the hydraulic bearing fan is significantly reduced, and the service life is very long, which can reach 40,000 hours. The hydraulic bearing is still essentially an oil bearing. However, after this improvement, the service life is greatly extended than ordinary oil-sealed bearings, and the advantages of oil-containing bearings are inherited-low operating noise. At present, hydraulic bearings have been used in AVC radiators, but not all AVC radiators use hydraulic bearing fans.

VAPO Bearing is an improvement of magnetic suspension technology by Sunon. It is to strengthen the hardness of oil-bearing bearing bushings and use special materials. The inner surface is also specially processed. This overcomes the problem of oil-bearing bearings. The disadvantage of high temperature resistance, combined with magnetic levitation technology, greatly extends the service life.

The magnetic bearing motor has a magnetic levitation (Magnetic System, MS) design. Its magnetic induction line is perpendicular to the magnetic levitation line, so the shaft core and magnetic levitation line are parallel, so the weight of the rotor is fixed on the running track. The almost unloaded shaft core is propped up in the direction of the anti-magnetic levitation line, forming the entire rotor suspended, on a fixed running track. Therefore, magnetic levitation is actually only an auxiliary function, not an independent bearing form. Specific applications must be matched with other bearing forms, such as magnetic levitation + ball bearings, magnetic levitation + oil-containing bearings, magnetic levitation + vaporized bearings, and so on. This technology has not been recognized by European and American countries.

Nano Ceramic Bearing (NCB) is still essentially an oil bearing, which was first introduced by Foxconn in its products. The traditional oil-bearing fan is severely worn during use, and its reliability is low when used for a long time. Nano-bearings effectively overcome this problem: ceramic bearing technology uses a special polymer material and special additives to fully integrate, the bearing core is fully made of special dioxide materials, using die and sintering process, crystal particles from the past 60um Down to 0.3um, it has strong, smooth and wear-resistant characteristics. Nano ceramic bearings have strong high temperature resistance and are not easy to volatilize, which greatly prolongs the service life of the fan. The properties of nano bearings are similar to that of ceramics, and the more they wear, the smoother they become. According to tests, the average service life of fans using nano-ceramic bearings is more than 150,000 hours. This technology is actually not real nanotechnology, and the materials used are not real nano-scale materials, just using words such as nano to attract attention.