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KOYO bearing work common problems and disposal methods
Source: China Bearing Network Time: 2014-10-31
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Bearing temperature; usually can be estimated according to the external temperature of the bearing housing. But the oil hole directly measures the temperature of the outer ring of the bearing is more accurate. The bearing temperature; gradually rises from the beginning of the work; usually the temperature is stable after 1~2 hours. If it is KOYO bearing Poor equipment; temperature will rise sharply; abnormal temperature is present. The reason is due to excessive smoothing agent, too small bearing clearance, poor equipment, excessive conflict of sealing equipment, etc. High-speed rotation; bearing layout, smooth selection of faults, etc. It is also the reason.
The transition sound of the bearing is viewed with a stethoscope, etc.; there are strong metal noise, abnormal sounds, irregular sounds, etc. to clarify the abnormality. The reason is that the smoothness is poor, the accuracy of the shaft or the bearing housing is poor, the bearing is damaged, and the foreign matter is invaded.
1. Corrugated surface corrosion: Spectral analysis found that the concentration of non-ferrous metal elements is abnormal. The sub-micron-scale wear particles of many non-ferrous metal components are present in the iron spectrum, and the smooth oil moisture overruns and acid value overruns.
2, the external appearance of the journal: There are iron-based cutting abrasive black oxide particles in the iron spectrum, and there is tempering color on the metal surface.
3, the outer surface of the journal corrosion: spectral analysis found that the concentration of iron is abnormal, the iron spectrum has many iron submicron particles, smooth oil moisture overrun or acid value overrun.
4, external strain: found in the iron spectrum cutting abrasive particles, abrasive particles are non-ferrous metals.
5, fretting wear behind the tile: spectral analysis found that the iron concentration is abnormal, there are many iron components in the iron spectrum sub-micron wear particles, smooth oil moisture and acid value is abnormal.
Under the condition of smooth liquid, the sliding surface is separated by smooth oil without direct contact, and the collision loss and appearance wear can be greatly reduced. The oil film also has a certain vibration absorption to add some chemical additives to the smoothing agent of KOYO bearing; Can reduce the bearing noise; can reduce the bearing noise from the original basis by 3. 9 ~ 9.2dB; suitable for use in miniature or small bearings.
Usually; if the bearing is used correctly; can be used until the end of the fatigue life is stopped. But there will be accidental premature injury; the condition that is not used. This early damage; relative to the fatigue life; the pair is called fault or incident The use of the limit of quality. Due to the inconvenience of equipment, operation, smoothness; foreign matter invading from the outside; the research on the thermal effects of the shaft and the outer casing is not sufficient.
Regarding the damage condition of the bearing; for example: the jam of the ferrule of the roller bearing; the reason can be considered; the lack of smoothing agent, the unsuitability, the disadvantage of the oil supply structure, the invasion of foreign matter, the error of the bearing equipment, the deflection of the shaft Too big; there will be coincidences.
If it is not broken, it will be more troublesome! Use a damaged method. Use a fine screwdriver to reach the seam of the side cover; forcefully lift the side cover; don't doubt it; that's it; but the side cover can't be loaded back! Um; discard it! Remember; just remove one side and it will be ruined!
Therefore; only the bearing damage is inquired; it is difficult to know the true cause of the damage. However, if the bearing is used, the operating conditions, the structure around the bearing, and the situation before and after the attack; the damage status of KOYO bearing and several reasons Can avoid similar attacks.
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