Viewing and troubleshooting in NTN bearing operations

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Viewing and troubleshooting in NTN bearing operations

Source: China Bearing Network Time: 2013-01-27
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In the NTN bearing operation, the project has the rolling sound, oscillation, temperature, and smooth condition of the bearing; the specific conditions are as follows:
1. The tumbling sound of the bearing is selected by the sounder to check the size and sound quality of the rolling sound of the bearing in the operation; even if the bearing has slight peeling and other damage, the abnormal sound and irregular sound will be announced; the sounder can be distinguished.
2. The oscillating bearing oscillation of the bearing is very sensitive to the damage of the bearing; for example, shedding, indentation, rust, crack, wear, etc. will be reflected in the bearing oscillation measurement; therefore, after selecting a special bearing oscillation measuring device (frequency analyzer, etc.) Measuring the large oscillating . 德 史 隹 隹 隹 隹 鲆 5 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭 咛迩榭. After the analysis and comparison, the discriminant specification is determined.
3. The temperature of the bearing of the bearing; usually the temperature outside the bearing can be estimated; if the oil hole can directly measure the temperature of the outer ring of the bearing; it is more suitable. Usually; the temperature of the bearing gradually rises with the beginning of the operation; 1-2 After a few hours, the stability is reached. The normal temperature of the bearing is different due to the heat capacity of the machine; the heat dissipation; the speed and load are different. If the inspection and fault handling in the NTN bearing operation is smooth and the device is suitable, the bearing temperature will rise sharply; Abnormal high temperature; it is necessary to suspend operations; take necessary precautions.
When the NTN bearing is damaged and disassembled, it can be judged according to the damage condition of the bearing.
1. The rolling surface outer metal bearing bearing rolling body and the inner and outer ring raceway surfaces all receive the effect of periodic pulsating load; then the contact stress changes during the attack cycle. When the number of stress cycles reaches a certain value; in the rolling body or inside and outside If the bearing load is too large, the fatigue will be aggravated. Others; the bearing device is not correct, the shaft is tortuous; the raceway will be off the surface. The bearing raceway will be worn off. The accuracy of the descent axis; the tissue oscillation and noise.
2. . Bearing burn burn bearings have tempering color on the raceway and roll body. The cause of burn is usually lack of smoothness, smooth oil quality does not meet the demand or transformation; and the bearing device is too tight.
3. The plastic deformation bearing has uneven pits on the touch surface of the raceway and the roller; it clarifies the plastic deformation of the bearing. The reason is that the bearing is under the effect of large static load or impact load; the partial stress of the external work exceeds the yield of the data. Limit; this condition usually occurs on bearings that rotate at low speeds.
4. The cause of the crack in the bearing ring crack bearing seat can be that the bearing cooperation is too tight; the outer ring or inner ring of the bearing is loose; the bearing part of the bearing is deformed; the outer surface of the bearing is poorly processed.
5. The reason why the cage is broken is that it is smooth and lacking; the rolling body is broken; the seat is inclined.
6. The reason why the metal of the cage adheres to the tumbling body is that the tumbling body is stuck in the cage or is lacking in smoothness.
7. Severe wear of the raceway can be caused by foreign objects falling into the race; lack of smooth oil or smooth oil trademark is not suitable.
The main factors affecting the damage of NTN bearings are: load condition, smooth condition, equipment condition, environmental conditions and raw materials or production precision.
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