The cause of the cooling fan lifespan
the bearing cooling fan of lifespan and use, use running environment temperature cooling fan, related to the balance of blades.
1, a cooling fan used bearings:
use double ball bearing, ball bearing is a high-end bearing, long service life, in the 50000 - 100000h。
use the oil-retaining bearing, oil bearing service life around 10000 h.
use hydraulic bearing, have greater than oil bearing oil storage space, the service life of around 40000 h. （ Under the situation of the runtime life) , so the selection of bearing the length of the life of the cooling fan accounts for a significant proportion.
2, cooling fan running environment temperature: in the operation of the cooling fan, environmental temperature around the work the more likely it is to reduce its life.
3, poor cooling fan blades balance, will that a cooling fan vibration, vibration over time will make noise increases, weightlessness, then death may be directly card fan.
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