Correct use of rolling bearings and common problems (2)

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Correct use of rolling bearings and common problems (2)

Source: China Bearing Network Time: 2014-10-17

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1. If the bearing temperature is too high during the organization operation; the part of the bearing of the device promises a certain temperature; when the tissue is touched by the hand; the handle should not be felt as normal; otherwise, the bearing temperature is too high.
The reason why the bearing temperature is too high is that the smooth oil quality does not meet the demand or the enthalpy change; the smooth oil viscosity is too high, the tissue device is too tight (the gap is lacking), the bearing device is too tight, the bearing race is changed on the shaft or the shell, and the load is over Large, bearing cage or rollover fragmentation.
2. Bearing noise Rolling bearings promise a subtle work noise during operation; if the sound is too loud or there is abnormal noise or impact sound, it indicates that the bearing is faulty.
The cause of the noise of the rolling bearing is more complicated; the first is the wear of the inner and outer rings of the bearing. Because of this wear; the cooperation between the bearing and the shell, the bearing and the shaft is destroyed; the axis is deviated from the correct orientation; In the high-speed movement, abnormal noise occurs. When the bearing is exhausted; its appearance metal falls off; it will also increase the radial gap of the bearing and cause abnormal noise. In addition, the bearing is smooth and lacking; the dry conflict is formed; and the bearing is broken and the abnormal movement will occur. After the bearing wears loosely; the cage is loose and damaged; abnormal noise will also occur.
Third, the damage of the rolling bearing when the rolling bearing is disassembled and viewed; the bearing fault and the cause of the damage 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 On the raceway of the raceway, there will be fatigue and shedding. If the bearing is too heavy, it will make the fatigue worse. Others; the bearing device is not correct, the shaft is tortuous; it will also appear on the raceway.
The fatigue of the bearing raceway will reduce the accuracy of the shaft; the tissue will oscillate 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 bearing foreign or inner ring is loose; the bearing housing is deformed; the bearing bearing surface 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.

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