Solution for slewing bearing noise

Noise is commonly caused by dust and breakage:

• Method to dust sounding

There are dust and other foreign matter in the slewing bearing, The so-called dust sounding with non-periodic vibration occurs, the magnitude of vibration and noise is uncertain, and it may have or not have.

Control method of dust sound: Improve the cleaning method of slewing bearing, strictly clean the bearing, shaft, seat hole and matching parts before re-assembling; remove foreign matter in lubricant; replace bearing seal; avoid impurity material or a plastic cage with foreign objects embedded in it.

• Control method of breakage sound

If the rolling surface of the slewing bearing has cracks, indentations or rust, periodic vibrations and noises such as riveted rivets will occur, and the period may be fixed but most of them have a certain correspondence with the rotational speed. The scars will continue on the channel. Occurs, the scratches appear on the steel ball, and the noise varies with installation and lubrication conditions. This kind of noise control method: the bearing cannot be struck during installation, the bearing is assembled with the shaft and then installed into the bearing seat to prevent the bearing from tilting; the bearing is prevented from rusting and the shock vibration is prevented during transportation; avoid to use high viscosity grease.

• Noise caused by lubrication factors and countermeasures

The wrong selection of lubricants, insufficient lubricant or aging grease can cause vibration and noise of the slewing ring, and there is no regularity in this kind of noise. In this case, only use a suitable lubricant, adjust the volume of lubricant, extend the life through lubricant and take attention to updated period.

• Noise related to the host and its countermeasures

This kind of noise is not caused by the bearing, so it is ineffective to look for the cause from the bearing alone. The host should be fully paid attention to, and the performance of the host should be improved if necessary. Now, we mainly described buzzing sound and the frame resonance sound in the motor. A Motor beep and its countermeasures The axial vibration of the motor shaft causes a lot of high-frequency noise – the buzzer sound, whose frequency is the same as the axial vibration frequency, which can be constant or variable. The method of preventing the buzzer is the same as the method of preventing the axial vibration. B-bearing frame resonance sound and its countermeasures When the axial natural vibration of the outer ring quality causes the axial bending natural vibration of the bearing frame, a noise called resonance sound is generated. Increasing the pre-tightening method can improve the axial natural frequency of the outer ring quality system, destroy the resonance condition, and reduce noise.