Rolling bearing noise is more complex, one of the bearing inner and outer mating surface wear. This kind of wear and tear, with the relationship of the destruction of the bearings and housings, bearings and shaft axis deviation from the correct position to produce abnormal noise in high-speed movement in the shaft. When bearing fatigue, surface metal flaking, also cause bearing radial clearance increased abnormal sound. In addition, insufficient bearing lubrication, a dry friction bearings broken will produce an unusual sound. The retainer loose damage, bearing wear Songkuang, will produce abnormal noise bearing damage.
Rolling bearings demolition inspection, bearing damage to determine the reasons for bearing failure and damage.
1 surface metal raceway spalling
Bearing rolling elements and the inner and outer ring raceway surface are exposed to periodic pulsating action of the load, thereby generating a periodic variation
Contact stress. When after stress cycles reaches a certain value, the rolling element or the outer ring raceway work surface to produce fatigue spalling. If the bearing load is too large, will this fatigue exacerbated. In addition, the bearing installation errors, shaft bending, will produce the raceway flaking. Bearing raceway fatigue spalling will reduce the running accuracy of the shaft, the institutions vibration and noise.
2. Bearing burns
Burn bearing its raceway, rolling element tempering color. Burn is generally insufficient lubrication, the quality of lubricating oil does not meet the requirements or deterioration, and tight bearing assembly.
3 plastic deformation
Raceway and roller contact surface uneven pits bearing plastically deformed. The reason is bearing a lot of static load or impact loads, the working surface of the local stress exceeds the yield limit of the material, which
The species generally occurs in low-speed rotation of the bearing.
4 bearing circle crack
Bearing race cracks may be due to the bearing with tight, loose bearing foreign or inner ring, bearing inclusive deformation, poor installation of the bearing surface processing.
5. Cage fragmentation
The reason is the lack of lubrication, rolling body crushing, such as seat skew.
6. Holder metal adhesion on the rolling body
The possible reason is that the rolling body is locked within the holder or insufficient lubrication.
7 seat raceway severe wear
Might fall into foreign body, lack of lubricating oil or lubricating oil grades inappropriate Block circle.


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