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[Do you know about heat dissipation] The service life factor of DC brushless fan

Release time:

2019-05-22

Generally, the working life of DC brushless fans is affected by the operating environment? working pressure. If the cooling fan works in a high-temperature working environment, it will accelerate the volatilization of the smooth liquid in the oil-immersed bearing, shrink the device, increase the friction force, increase the coil resistance, and increase the heat generation.

Usually,DC brushless fanThe working life is affected by the operating environment? working pressure. If the cooling fan works in a high-temperature working environment, it will accelerate the volatilization of the smooth liquid in the oil-immersed bearing, shrink the device, increase the friction force, increase the coil resistance, and increase the heat generation.
However, dust will change the quality of the fan blades, increase friction, increase wind resistance, affect its own heat dissipation, stop thermal communication between the heat sink and the air, and cause electrostatic discharge to damage components and equipment. The harsh operating environment may make the effect of the fan greatly reduced, and the life span is greatly reduced.
直流无刷风扇
And ifDC brushless fanIf the working pressure is high, the faster the fan speed, the faster the bearing wear, the more heat the stator winding coil and electronic components, and the shorter the life span.
We are choosingDC brushless fanWhen, the first thing to consider is the life span, how long can it last, thenDC brushless fanWhat are the factors of life? The main thing is the bearing, then the ambient temperature and the balance of the fan blades.
1. Bearing: the life of double ball bearing is nominal 50000 hours, and the life of oil bearing is nominal 3 hours (under normal temperature)
2. Ambient temperature: The higher the temperature, the shorter the life span, especially the cooling fan with oil bearing type, which is particularly sensitive to high temperature
3. The balance of the fan blades: the balance of the fan blades is poor, and the shaking is severe. After a long time, the noise will appear first, and then it may get stuck.
Although the mold design has been done as much as possible to make the fan blades more balanced, if the fan blades still shake during operation, we have a high-precision dynamic balancing machine to correct and repair, so that the fan blades run more smoothly and have a longer service life, which is ignored by many cooling fan factories.

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