Automobile AC fan) high cost and high quality.
u003cbru003eThe disadvantages of automotive bearings are the high manufacturing cost and the maximum noise at the same speed level. Automotive bearings and hydraulic bearings have better sealing properties, especially automotive bearings. The automobile bearing is completely embedded in the fan, and the rotating part is not in 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 5000 rpm use automotive bearings. However, hydraulic bearings have a unique return type oil circuit, so the possibility of lubricating oil leakage is small, so there is no need to worry too much.
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