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Bearing is the most important part of cooling fan
There are many factors that determine the quality of the cooling fan, including the fan air volume, noise, speed, size, dynamic balance of the fan, and the operating environment, among which the most important is the bearing of the fan.
When you know the effect of bearings on fans, you will know that some fans will be very cheap for a few yuan, while some fans are hundreds. There are many types of bearings. Only those used in cooling fans are only those. Sleeve bearings with sliding friction, ball bearings with rolling friction and hybrid bearings of two bearing forms are used, In recent years, various heat dissipation fan manufacturers have introduced new technology in bearing. Let's see what effect bearing has on the silence and life of the wind.
The types of bearings are:
Oil bearing: cheaper, the higher the noise is, the service life is about 20000 hours
The advantages are that the price is relatively low, the disadvantage 1. The bearing is easy to wear and the service life is shorter. 2. The lubricating oil in the bearing sleeve leaks out, and the noise is getting bigger and higher.
Hydraulic bearing: cheaper, the higher the noise is, the service life is about 30000 hours
The advantages are low noise, cheaper price and longer oil life. The disadvantage is that there is a problem of oil leakage.
Single ball bearing: medium price, low noise, service life of 40000 hours
The advantage is that the temperature is lower than the oil temperature and the cost is low. The disadvantage is that noise is higher than oil
Double ball bearing: high price, low noise, service life more than 60000 hours
The advantages are good sealing and long service life. The disadvantage is that it is expensive.
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