Common bearing abnormalities and their causes

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Common bearing abnormalities and their causes

Source: China Bearing Network Time: 2013-10-08

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The main reason for the bearing oscillation is: the change piece and the stop part in the machine touch.
Method: Look carefully at each transition in the machine; prevent seizures.
There is a foreign body entering the bearing cause: the touch oil seal is severely worn; causing the smooth oil to leak.
Method: Correct the machine balance from the beginning; replace a bearing housing with a hole diameter.
The bearing oil gap is too large: the bearing clearance is too large to cause the shaft to oscillate.
Method: Select the appropriate bearing clearance. Install a spring on the outer ring of the non-locating bearing to eliminate the axial and radial lifting.
Equipment oscillation causes: equipment oscillation.
Method: Check the balance of the rotating body and correct it.
Reason for the straightness of the part is not good: the straightness of the shoulder, the hole of the box hole or the fixed nut is not good; the contact with the bearing is bad.
Method: Grinding the shaft diameter; to obtain the proper fit of the shaft and the bearing; if this is done; the bearing with larger clearance can be selected.
The cause of bearing discoloration: bearing discoloration.
Approach: Improve the slick approach.
The diameter of the shaft is too large: the diameter of the shaft is too large; the bearing inner ring is swollen and severe; the bearing clearance is reduced.
Method: Grinding the shaft diameter; to obtain the proper cooperation of the shaft and the bearing; if this is not possible, the bearing with larger clearance can be selected.
The bearing housing aperture is too small: the inner diameter of the bearing housing is too small.
Method: Check whether the bearing box can pinch the bearing; the box hole can be further trimmed to the correct size.
The bearing housing aperture is too large: the bearing housing hole is too large; the force is not balanced.
Method: Correct the machine balance from the beginning; replace a bearing housing with a hole diameter.
The bearing housing hole data is too soft: because the material of the box hole is too soft; the hole diameter becomes larger after the force is applied; causing the outer ring to slip in the box hole.
Solution: first expand the box hole and insert a bushing; then machine the bushing to the correct size.
The outside has the origin of the oscillation source: when the machine does not turn; the bearing is in an oscillating condition.
Method: Look carefully at the bearing and machine parts where there is a small distance between the friction. In this case, the ball bearing is more resistant to vibration than the roller bearing.
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