The bearing type refers to the type of bearing used by the air-cooled radiator fan. In mechanical engineering, there are many types of bearings, but there are only three types of bearings used in radiator products according to their basic working principles: Sleeve Bearings using sliding friction and Sleeve Bearings using rolling friction. Ball Bearing (Ball Bearing) and a mixture of these three types of bearings. In recent years, new technologies introduced by major radiator manufacturers in bearings, such as magnetic bearings, fluid protection system bearings, hydraulic bearings, Rifle bearings, nano-ceramic bearings, etc., are all improvements to the above basic bearing forms. , the basic working principle remains unchanged.
Sleeve Bearing is a sleeve bearing that uses sliding friction. It uses lubricating oil as a lubricant and drag reducer. It has low operating noise and low manufacturing cost during initial use, but this kind of bearing wears out. Seriously, there is a big gap in service life compared with ball bearings. Moreover, when this kind of bearing is used for a long time, due to the oil seal (radiator products cannot use high-end oil seals, which are generally ordinary paper oil seals), the lubricating oil will gradually evaporate, and dust will also enter the bearing, causing the fan speed Slowing down, increased noise and other problems. In serious cases, the fan may be eccentric and cause severe vibration due to bearing wear. If these phenomena occur, you must either open the oil seal and refuel, or you must eliminate and purchase a new fan.
Single ball bearing (1 Ball 1 Sleeve Bearing) is an improvement on traditional oil-impregnated bearings. It uses a mixture of sliding friction and rolling friction. In fact, it uses a ball bearing with an oil-impregnated bearing to reduce the friction between the two bearings. The cost of ball bearings is that the rotor and stator are lubricated with balls and lubricating oil. It overcomes the problems of short service life and unstable operation of oil-containing bearings, while the cost increase is extremely limited. The single ball bearing absorbs the advantages of the oil-impregnated bearing and the double ball bearing, extending the service life of the bearing to 40,000 hours. The disadvantage is that after adding the balls, the operating noise increases, but it is still less than the double ball bearing.
Double ball bearings (2 Ball Bearing) are relatively high-end bearings. They adopt the form of rolling friction and use two ball bearings. There are several tiny steel balls in the bearing surrounding the axis. When the fan leaf or axis When rotating, the steel ball will rotate accordingly. Because they are all spheres, the friction is small and there is no problem of oil leakage. The advantage of double ball bearings is that they have a long service life, about 50,000-100,000 hours; they have good anti-aging properties and are suitable for fans with higher speeds. The disadvantages of double ball bearings are their high manufacturing cost and the loudest noise at the same speed level. Double ball air bearings and hydraulic bearings have better sealing properties, especially double ball bearings. The double ball bearings are 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 with a speed of 5,000 rpm use double ball bearings. The hydraulic bearing has a unique return oil circuit, so the possibility of lubricating oil leakage is smaller.
The representative manufacturer of Rifle Bearing technology is CoolerMaster. Currently, CoolerMaster has upgraded most of its traditional oil bearing fans to Rifle bearings. As an improvement on traditional oil-containing bearings, Laifu bearings are made of high-oil-containing hollow bearings made of wear-resistant materials, which reduce the friction between the bearings and the shaft core. Laifu bearings also have a shaft core with reverse spiral grooves and oil retaining grooves. When the fan is running, the oil will form a reverse flow, thereby avoiding the loss of oil and thus extending the bearing life. By adopting the above structure and parts, Laifu bearing fans have greatly improved their oil-containing and oil-retaining capabilities and reduced noise.
Hypro Bearing, whose name comes from HY (Hydrodynamic wave) PRO (Oil protection system, oil protection system), is a product of ADDA, a well-known radiator and fan design and manufacturing manufacturer. The patented product is also made from many improvements based on traditional oil-impregnated bearings. Fluid protection system bearings and hydraulic bearings have the same goal. The two designs each adopt some unique improvement measures, but the essence is the same circulating oil system, and their performance in all aspects is basically the same. Usually the product life can reach more than 50,000 hours.
Hydraulic Bearing is a technology pioneered by AVC and is improved on the basis of oil-impregnated bearings. Hydraulic bearings have a larger oil storage space than oil bearings and have a unique loop-back oil supply circuit. The working noise of the hydraulic bearing fan is significantly reduced, and the service life is also very long, which can reach 40,000 hours. Hydraulic bearings are still essentially oil-impregnated bearings. However, this type of bearing has been improved, and its service life is much longer than that of ordinary oil-sealed bearings, and it inherits the advantages of oil-containing bearings - low operating noise. Currently, hydraulic bearings have been used in AVC radiators, but not all AVC radiators use hydraulic bearing fans.