Four warning stages before bearing failure, when is the best time to replace the bearing?

The first stage, that is, the initial stage of bearing failure.

At this time, the temperature is normal, the noise is normal, the total vibration speed and frequency spectrum are normal, but the peak energy and frequency spectrum have a sign, reflecting the initial stage of bearing failure. In this case, the real bearing failure frequency occurs in the ultrasonic section in the range of about 20-60khz.

In the second stage, the temperature is normal, the noise increases slightly, and the total vibration velocity increases slightly

In the third stage, the temperature increases slightly, the noise can be heard, the total vibration velocity increases greatly, and the frequency spectrum of vibration velocity clearly shows the bearing fault frequency, its harmonic and sideband

In the fourth stage, the temperature increased significantly, the noise intensity changed significantly, the total vibration velocity and the total vibration displacement increased significantly, and the bearing failure frequency started to disappear on the vibration velocity spectrum, which was replaced by a larger random broadband high-frequency noise level. The amount of peak energy increases rapidly

Therefore, in the practical work is faced with the problem of bearing, considering the development of the bearing fault in the fourth phase is harmful to the unpredictable sudden, suggest that late in the third stage to replace bearings, both to avoid failure of expansion and more serious accidents, and to try to ensure the service life of rolling bearing, and according to the bearing on has also appear to the naked eye can see the wear and tear, damage to the parts, such as rolling bearing fault characteristics, more persuasive.

Note:This article is reproduced from Official account on Wechat.