The balance of the fan impeller of graphics card is very important to the vibration and noise of electric pump. In order to improve the product quality, the impeller adopts more active dynamic balance. The tolerance of one-sided unbalanced weight must be controlled below 2g, which not only ensures the balanced rotation of the impeller, but also reduces the vibration caused by the imbalance of the impeller, reduces the noise and radial force, and prolongs the service life of the bearing.
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The bearing of the fan is very important to the fan. At present, many graphics card fans use ball bearings, and spherical alloy steel balls are installed between the inner steel ring and the outer steel ring to reduce friction and improve the transmission efficiency of mechanical power by rolling.
In the past, oil-sealed bearings were commonly used, which were sleeve bearings with sliding friction. Lubricating oil was used as lubrication and drag reducer. Although the noise is low and the manufacturing cost is low, it is seriously worn and its service life is far from that of ball bearings. Moreover, after a long period of use, due to the oil seal, the lubricating oil will gradually evaporate, and dust will also enter the bearing, causing problems such as slower fan speed and increased noise.
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