The fan bearings’s life.pdf
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In accordance with the information you provide ，the Operating
temperature is 25°, so this temperature will not affect the fans service life.
The fan bearings are vulnerable parts in this system,so We focuse on the
life of the bearing.We all know that following the system rotate, the rotor
of the fan will generate a centrifugal force. When the fan working in the
rotating system , It is subject to three parts forces. The first is the fans
own unbalanced force. the second is aerodynamic force, It is caused by
the air flow state change. The last part is the centrifugal force. To simplify
the problem, we only examined the centrifugal force.The centrifugal
force F can be disintegrated into a axial component F and a vertical downward
c a
component Fr (see the picture 1).
10 6 f C ε
⎛ t ⎞
L h ⎜ ⎟ (1)
60 n ⎝ P ⎠
For ball bearing
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