The working principle of the cooling fan is realized by energy conversion, namely, electric energy → electromagnetic energy → mechanical energy → kinetic energy. The cooling fan is also divided into various forms.The performance of the cooling fan will vary depending on the bearings used.Every time the fan is talked to the customer, they will be asked whether they choose the ball bearing or the oil bearing.As a result, they will always be asked what is the difference between the oil bearing and the ball bearing? Here let's make up a small script to answer your questions.

        First of all, the working principle of ball bearings is that there are several tiny steel balls around the axis in the bearings, and when the fan or axis rotates, the steel balls will rotate with it. Because they are all spheres, the friction force is small and there is no problem of oil leakage. The main advantages of ball bearings are long service life and high precision.Ball bearings are divided into single ball bearings and double ball bearings.

        1 ) single ball bearing

          Accuracy comes second;

          The service life is about 30000 hours, total:1250 days, 3.4 years;

          Line and point contacts are available.

          The running friction comes second.

        The use method has the characteristics of oil-bearing bearing/double ball bearing.The running load mainly falls on the ball at the front end, while the copper compound at the rear end serves as a fulcrum and is adjusted according to the action center after ball positioning.

          The fan is preferably fixed in the vertical direction.

2 ) double ball bearings

The highest precision;

The service life is about 50000 hours, total:2084 days, 5.7 years;

The relative motion of bearing and shaft is point contact.

The motion friction is small.

The ball in the bearing will rotate with lubricating grease under the positioning of the retainer.

The fan can be fixed in any direction.

3 ) oil bearing

Low precision;

The service life is about 20000 hours, total:834 days, 2.3 years;

the bear is in contact with that relative motion line of the shaft;

The running friction force is larger.

Vacuum immersion method is adopted to store oil in the oil hole on the inner diameter surface of the bearing, and oil film lubrication is formed by running friction to generate heat.

It is better to use the fan vertically to fix it.

In short, if you need a long life and don't care too much about noise, use ball bearings.If you care about noise and change fans frequently, use oil-bearing fans.Choose them flexibly according to your needs, and the best one is for you.