Whether the bearing is available is mainly determined by considering the degree of bearing damage, mechanical properties, importance, operating conditions, and the period to the next maintenance. If the following defects can not be used, must be replaced with a new thrust ball bearing. There are cracks or notches on the inner ring, outer ring, rolling body and cage.

Wear failure is one of the common failure modes of bearings, which can be divided into abrasive wear and adhesive wear.

1. Oil film resistance diagnostic technology

Features: The same evaluation standard can be used for different working conditions. The diagnosis effect of surface spalling, indentation and crack is poor.

Application: suitable for the rotary shaft exposed occasions.

2. Vibration diagnosis technology

Features: Vibration diagnosis technology is widely used; Online monitoring can be realized; Diagnosis is fast and the theory of diagnosis is mature.

Application: especially suitable for bearing fault monitoring in rotating machinery.

3. Ferrographic diagnostic techniques

Features: Machine without disintegration; Low investment, good effect; Early fatigue failure of oil-free bearings can be found. Can do wear mechanism research.

Application: It is suitable for fault diagnosis of bearings lubricated with lubricating oil. It is more difficult for bearings lubricated with grease.

4. Temperature diagnosis technology

Features: Simple diagnosis; It is better to judge the bearing burn.

Application: It is suitable for simple and routine diagnosis of bearings in machines.

5. Optical fiber monitoring and diagnosis technology

Features: high sensitivity of optical fiber displacement sensor; The signal is extracted directly from the surface of oil-free bearing to improve the signal-to-noise ratio. It can directly reflect the manufacturing quality, surface wear, load, lubrication and clearance of bearings.

Application: It is suitable for the machine which can install the sensor in the bearing seat.

6. Acoustic emission diagnostic technology

Features: Rapid and simple diagnosis; It can be monitored online.

Application: The new technology developed in recent years is seldom used in bearing condition monitoring.

When taking oil-free bearings directly by hand, the sweat on hands should be fully washed and coated with high-quality mineral oil before operation. In rainy season and summer, rust prevention should be paid special attention to. Under some special operating conditions, bearings can obtain longer life than the traditional calculation, especially under light load. These special operating conditions are when the rolling surface (rails and rolling parts) is effectively separated by a lubricating film to limit the surface damage that may be caused by contaminants. In fact, under ideal conditions, so-called permanent bearing life is possible

Strong stamping is not allowed, direct hammering of bearings with hammers is not allowed, and pressure transmission through rolling bodies is not allowed.

When the bearing rotates, the raceway surface of the inner ring and outer ring is in rolling contact with the rolling body, so the running track is dark. The running track attached to the raceway surface is not abnormal, so the load conditions can be known. Therefore, when removing the oil-free bearing, please pay close attention to and observe the running track of the raceway surface.

If you have anyquestions,pls feel free to contact us

e-mail:bearing6@hyzcgroup.com