The common noise of slewing ring is dust and scars. The methods to deal with slewing ring noise are as follows:
1. Noise caused by lubricating elements: Lack of lubricant, wrong selection of lubricant or aging and hardening can cause vibration and noise of the slewing ring, and there are no certain rules for this noise. Regarding this situation, only need to select a suitable lubricant, adjust the amount of lubricant, extend the life of the lubricant and reasonably recognize the replacement cycle.
2. Control method of scar sound: If there are cracks, indentations or rust on the rolling surface of the slewing ring, periodic vibration and noise like riveting rivets will occur. The period may be fixed, but most of them have a certain connection with the speed. , The scars will occur continuously on the channel, and the scars will appear on the steel ball from time to time, and this kind of noise will vary with the equipment and lubrication conditions. Don't knock the bearing when the equipment is in the equipment, avoid the bearing installation when assembling the bearing and the shaft and then put it into the bearing seat; avoid bearing corrosion when stocking and avoid shock and vibration when transporting; use high viscosity grease.
3. The control method of dust sound: there are foreign objects such as dust in the slewing bearing, and non-periodic vibration will occur. The vibration and noise of dust sound are variable, and may or may not. Improve the cleaning method of the slewing ring. Before the equipment, clean the bearings, shafts, seat holes and matching parts strictly; remove foreign objects in the lubricant; improve the sealing of the bearings; avoid using plastic cages with impure materials or embedded foreign objects.
4. Noise related to the main engine and its countermeasures: This kind of noise is not simply caused by the bearing, so it is invalid to find the cause from the bearing alone. The main engine should be fully paid attention to, and the function of the main engine should be improved if necessary.
Now we will first describe the common buzzing sound and frame resonance sound in motors. Motor buzzer: The axial vibration of the motor shaft will cause a lot of high-frequency noise-the buzzer, the frequency of which is the same as the axial vibration frequency, but the same can be changed. The method of avoiding buzzing is the same as that of avoiding axial vibration. Bearing frame resonance sound: When the axial natural vibration of the outer ring mass system causes the axial tortuous natural vibration of the bearing frame, a kind of noise called resonance sound occurs. The method of increasing the preload can improve the axial natural frequency of the outer ring mass system, damage the resonance condition, and reduce the noise.
