Analysis of Common Damage Causes of Harmonic Reducer Bearings

update:2022-06-23

abstract:The bearing of the harmonic reducer will inevitably have various problems during use. In addition to...

The bearing of the harmonic reducer will inevitably have various problems during use. In addition to its own quality problems, some unreasonable operations during use will also cause damage to it, thereby affecting its service life and causing harmonics. The wear and tear of the reducer fails, resulting in other serious consequences.
1. The cavity is not cleaned or the grease added is not clean, which increases the wear, vibration and noise of the bearing, damages the bearing raceway, causes the temperature rise to be too high, and burns the bearing.

2. Because the operating temperature of the motor body is too high, and the bearing is not replenished with grease in time, the bearing is short of oil or even burned. Mixing of different greases can also cause bearing damage.

3. Improper assembly of the bearing, uneven tapping on the inner ring of the bearing during cold loading will cause the shaft to be worn, resulting in the loss of the interference between the inner ring of the bearing and the bearing or the reduction of the interference, and the phenomenon of running the inner ring occurs, and the motor end cover is not installed. Even knocking leads to the loose fit between the end cover bearing chamber and the bearing outer ring and the phenomenon of running out of the outer ring.

4. The harmonic reducer does not operate for a long time, resulting in the deterioration of the grease and the rust of the bearing, and the maintenance is not carried out in time.

5. Due to the axial misalignment of the stator and rotor cores or the insufficient precision after re-machining the rotating shaft, the bearing operation caused by the fact that the inner and outer rings of the bearing are not on the same tangent plane causes the temperature to rise and burn the bearing.

6. Due to the problem of the manufacturer, the clearance of the harmonic reducer bearing is too small or too large, the clearance of the bearing is too small, it will be too tight when rotating, and the clearance of the bearing is too large, which will cause abnormal noise and accelerate its damage. .

7. The bearing of the harmonic reducer is affected by the extra load.

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