How do you feel about the noise from the bearing pedestal

The noise caused by problems in bearing application can be divided into two types: scratch sound and dust sound, which are as follows:

(1) Scar sound and its control method.

If cracks, indentations, or corrosion occur on the rolling surface of rolling bearings, periodic vibration and noise such as riveting rivets can occur. Its cycle may be fixed, but most correspond to speed. Scars will occur continuously on the channel, and the scars will hide on the steel ball. This noise will vary depending on installation and lubrication conditions.

The method for controlling this noise is as follows: Do not knock on the bearing during installation. When the bearing is assembled with the shaft and installed on the bearing seat, prevent the bearing from tilting; Use high viscosity grease.

(2) Dust noise and its control methods.

If there is dust and other foreign matter in the rolling bearing, non periodic vibration and so-called dust noise can occur. The magnitude of vibration and noise is uncertain, with or without. Methods for controlling dust sound include improving the shaft. Cleaning method for bearings. Before installation, strictly clean the bearings, shafts, seat holes, and related accessories; Remove foreign matters from the lubricant; Improve bearing sealing; Avoid using plastic brackets with impure materials or embedded foreign objects.

(3) Countermeasures caused by noise and lubrication factors.

The choice of lubricant is incorrect. Insufficient lubricant or aging and hardening can lead to bearing vibration and noise, and there is no fixed noise pattern. In this case, only by selecting the appropriate lubricant, adjusting the amount of lubricant, extending the service life of the lubricant, and reasonably determining the replacement cycle.

Noise related to the main engine and its countermeasures.

This noise is not only caused by bearings, so it is futile to find the cause solely from the perspective of bearings. If necessary, pay full attention to the host to improve its performance. This article mainly describes the common beeps and frame resonance sounds in electric machines.

(1) The buzzer of the motor and its countermeasures.

The axial vibration of a motor shaft can cause a large amount of high-frequency noise, and its frequency is the same as the axial vibration frequency, which can be either constant or constant. The method for preventing buzzing is the same as for preventing axial vibration.

(2) Resonant sound of bearing frame and its countermeasures.

When the axial natural vibration of the aforementioned outer ring mass system causes axial bending and natural vibration of the bearing frame, a noise called resonant sound will be generated. Adding a preload method can increase the axial natural frequency of the outer ring mass system, destroy resonance conditions, and reduce noise.