Bearing form refers to the shape of the air-cooled radiator fan bearing class. Type in mechanical engineering, bearing very much, but the form bearing radiator products in accordance with the classification of the basic works also then three ways: using the sliding friction sleeve bearings (Sleeve Bearing) and the use of rolling friction ball bearing (Ball Bearing), as well as the form of two bearing mixing these three. In recent years the major radiator manufacturers in the bearing aspects of the launch of the new technology, such as magnetic bearing fluid protection system bearing, hydraulic bearing, Fu bearings, nano-ceramic bearings is also made to improve these basic forms bearing The basic working principle or no change.
Oil bearing (Sleeve Bearing) is the use of sliding friction sleeve bearings, lubricating oil as a lubricant and DRA initial run, low noise, and low manufacturing costs, serious but this bearing wear life than ball bearing a big gap. And the use of such bearings over time, due to the oil seal (computer radiator products can not use the high-grade oil seals, generally is ordinary paper oil seal), lubricating oil will gradually volatile, and the dust will enter the bearing, causing the fan slower speed, the noise increases, but also a serious fan eccentric bearing wear lead to severe vibration. These phenomena, either to open oil seal refueling, or only out to purchase another new fan.
Single ball bearing (1 Ball +1 Sleeve Bearing) improvement of the traditional oil bearings, sliding friction and rolling friction mixed form, in fact, with a way to reduce the cost of double ball bearing ball bearing with an oil bearing it ball lubrication between the rotor and the stator, and with lubricating oil. It overcomes the oil bearing short life, running instability problems, and the rising cost of extremely limited. Single ball bearing absorbs the advantages of oil bearing and double ball bearings, bearing service life of up to 40,000 hours, the drawback is that after joining the ball, run the noise has increased, but still less than double ball bearings.
Double ball bearing (2 Ball Bearing) belongs to the more upscale bearing rolling friction in the form of the two ball bearings, several pieces of tiny steel ball bearing around the axis, when the fan page or axial rotation, ball that followed the rotation . Is a sphere, so less friction, and there is the problem of oil spills. Double ball bearing advantages of long life, about 50000-100000 hour; aging resistance, suitable for high speed fan. The disadvantage of the double ball bearing is the high manufacturing cost, and at the same speed level noisiest.
Double ball air bearings and hydraulic bearing closed, especially double ball bearing. Double ball bearing the entire embedded in the fan, rotating parts is not in direct contact with the outside world. In a sealed environment, the working environment of the bearing is relatively stable. 5000 rpm level large-diameter fan is almost double ball bearing.
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