What are the main solutions to bearing noise?

The noise caused by the problems in the use of bearings is generally divided into two types: scar sound and dust sound, which are described as follows:

(1) Scars sound and control measures

If there are cracks, embossing or rust on the flipped surface of the flipped bearing, it will produce regular vibration and noise like riveted bolts. With a certain corresponding relationship, scars continue to appear on the section, and scars are looming on the bearing steel ball, and this kind of noise changes with the installation and lubrication standards.

The control measures for this kind of noise are: do not knock the bearing during installation, avoid bearing installation tilt when assembling the bearing and the shaft and then install it into the bearing seat; avoid bearing rust when stocking and avoid shock vibration during transportation; high application viscosity of lubricating grease.

(2) Dust noise and control measures

If there is dust and other dirty things in the flip bearing, it will produce aperiodic vibration and dust sound.

The control measures for dust and noise include: improving the cleaning method of the bearing, strictly cleaning the bearing, shaft, seat hole and its matching parts before installation; eliminating the dirt in the lubricant; improving the sealing performance of the bearing; preventing the use of raw materials Defective or dirty plastic ball bearings.

(3) Noise caused by moisturizing elements and preventive measures

Incorrect use of lubricant, insufficient lubricant or brittle hard lumps can cause vibration and noise in the bearing, and this kind of noise has no certain regularity. In response to such conditions, only suitable lubricants are used, the amount of lubricant is adjusted, the service life of the lubricant is increased, and the replacement cycle time is effectively defined.

Server-related noise and precautions

This kind of noise is not caused by the bearing alone. Therefore, it is futile to find the cause from the bearing level. It is necessary to pay attention to all aspects of the server, and improve the characteristics of the server when necessary. Now key to describe the common hum in the motor and the series resonance of the sound card rack.

(1) The hum of the motor and preventive measures

Axial vibration of the motor shaft can cause a very loud high frequency noise - hum, the frequency of which is the same as the axial vibration frequency and can either be constant or transition. Humming can be avoided in the same way as axial vibration.

(2) series resonance sound of bearing frame and preventive measures

In the above-mentioned situation, when the original vibration of the outer mass in the axial direction causes the original vibration of the axial bending of the bearing frame, a kind of noise called series resonance sound is caused along with it. The way of increasing the torque can increase the axial resonance frequency of the outer mass system, destroy the series resonance standard, and reduce the noise.