Method Of Preloading “Pretightening” To Improve The Rigidity Of Deep Groove Ball Bearings

1.Surface strain of single row deep groove ball bearing: cutting abrasive grains are found in the ferrogram, and the abrasive grains are composed of non-ferrous metals.

2.Surface corrosion of single row deep groove ball bearing journal: Spectral analysis found that the concentration of iron elements was abnormal. There were many submicron particles of iron components in the ferrogram, and the moisture or acid value of the lubricating oil exceeded the standard.

3.Corrosion of the bearing pad surface: Spectral analysis found that the concentration of non-ferrous metal elements was abnormal; many sub-micron wear particles of non-ferrous metal components appeared in the ferrogram; the moisture content and acid value of the lubricating oil exceeded the standard.

4.Fretting wear of the back of the bearing pad: Spectral analysis found that the iron concentration was abnormal. In the ferrogram, there were many submicron wear particles of iron components, and the moisture and acid value of the lubricating oil were abnormal. Under the condition of liquid lubrication, the sliding surface is separated by the lubricating oil without direct contact, which can also greatly reduce friction loss and surface wear, and the oil film also has a certain ability to absorb vibration.

5.Surface strain of single row deep groove ball bearing journal: there are iron-based cutting abrasive particles or black oxide particles in the ferrogram, and there is tempering color on the metal surface.