Views: 53 Author: Site Editor Publish Time: 2022-12-13 Origin: Site
① Control method of dust noise
There are dust and other foreign matters in the slewing branch, which will cause non periodic vibration. The so-called dust noise, whose vibration and noise are variable in size, may or may not exist.
Control method of dust noise: improve the cleaning method of slewing ring/rotary table bearing, and strictly clean the bearing, shaft, seat hole and matching parts before installation; Remove the foreign matters in the lubricant; Improve the sealing of bearings; Avoid using plastic cages with impure materials or embedded foreign matters.
③ Noise caused by lubrication factors and its countermeasures
Incorrect selection of lubricant, insufficient lubricant or aging hardening can cause vibration and noise of slewing ring/rotary table bearing, and such noise has no certain rule. In this case, only the proper lubricant is selected, the lubricant quantity is adjusted, the service life of the lubricant is extended and the replacement cycle is reasonably determined.
④ Noise related to main engine and its countermeasures
This noise is not only caused by the bearing, so it is invalid to find the cause only from the bearing. The main engine should be paid full attention to, and the performance of the main engine should be improved if necessary. This paper mainly describes the common buzzer and frame resonance sound in the motor.
Buzz of A motor and its countermeasures
The axial vibration of the motor shaft will cause a large high-frequency noise - buzzer. Its frequency is the same as the axial vibration frequency, which can be either constant or variable. The method to prevent buzzer is the same as that to prevent axial vibration.
B Bearing frame resonance sound and its countermeasures When the said outer ring mass causes the axial bending natural vibration of the bearing frame due to the axial natural vibration, a noise called resonance sound will be generated accordingly. The method of increasing preload can improve the axial natural frequency of the outer ring mass system, destroy the resonance condition and reduce the noise.