The wall fan is used
at a different incline angle. During
rotation of motor, oil flows out of
the bearing by the way of the shaft.
Shaft rings are located before the
bearing and rotate simultaneously
with the shaft. Oil which has flowed
out is shaken away by centrifugal
force and received back by the oil
stopper to be absorbed in the felt
ring, then moves again to the bearing.
But if the incline angle is at minimum
position (as shown) , oil will drip
out instead of being collected back
by the felt
2.
Atmosphere
Wall fan is used normally
at commercial and industrial places
which are exposed to high temperature,
humidity, dust and chemical atmosphere.
In this condition, oil condensation
is at maximum rate and unwanted particles
are trapped in between the shaft and
bearing.
