Analysis of the cause of the failure of the fan bearings

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Vane on both sides with adapter sleeve bearings and bearing fixed tie. Re-commissioning took place the free end of the bearing high temperature, high vibration value of failure, apart above the bearing turns, the manual slow rotation fan, found in a particular position of the shaft bearing roller scroll, also in non-load situation. This high determine the changes in the bearing running clearance and installation gap may be insufficient. Learned by measuring bearing internal clearance of only 0.04mm to turn uranium eccentricity up to 0.08mm; around a large bearing span, shaft the deflection or bearing mounting angle error is more difficult to avoid, therefore, a large fan automatically Heart the adjusted spherical roller bearings. When lack of space inside the bearing inside the bearing rolling elements due to the restriction of the movement of the space, the automatic function of the heart affected, the vibration value but will rise.special bearing Bearing internal clearance with decreases with increased tightness, unable to form a lubricating song film bearing running clearance is reduced to zero due to the temperature rise and, if the heat generated by the bearings run is still greater than the heat escaping, bearing temperature that will quickly climb At this time, if not immediate shutdown, the bearings will eventually burning the bearing inner ring with the shaft with tight bearing operation in this case is unusually high temperatures cause. bearing manufacturer