Tapered roller bearings use hearing to identify irregular operation

When operating the bearing, the sweat on the hand will become the cause of rust. Pay attention to operate with clean hands and wear gloves as much as possible. It is a very common method for tapered roller bearings to use hearing to identify irregular operation. For example, it is used by experienced operators to detect the abnormal noise of a part with the help of electronic stethoscope. If the bearing is in good operation condition, it will make a low whine. If it makes a sharp hiss, tapered roller bearing, squeak and other irregular sounds, it usually indicates that the bearing is in poor operation condition.
1. Tile surface corrosion: abnormal concentration of non-ferrous metal elements is found by spectral analysis; Submicron wear particles with many nonferrous metal components appear in ferrography; The water content and acid value of lubricating oil exceed the standard.
2. Journal surface strain: there are ferrous cutting abrasive particles or black oxide particles in the ferrogram, and there is tempering color on the metal surface.
3. Journal surface corrosion: abnormal iron concentration is found by spectral analysis. There are many submicron particles of iron in the ferrogram, and the moisture or acid value of lubricating oil exceeds the standard.
4. Surface strain: cutting abrasive particles are found in ferrography, and the abrasive particles are composed of non-ferrous metals.
5. Fretting wear of pad back: abnormal iron concentration is found by spectral analysis. There are many iron components, submicron wear particles, abnormal moisture and acid value of lubricating oil in the ferrogram.
Under the condition of liquid lubrication, the sliding surface is separated by the lubricating oil without direct contact, which can also greatly reduce the friction loss and surface wear, and the oil film also has a certain vibration absorption ability.
Sharp squeaking noises may be caused by improper lubrication. Improper bearing clearance can also cause metal sound. The dent on the outer race track of tapered roller bearing will cause vibration and cause smooth and crisp sound. If it is due to the knocking scar caused during installation, it will also produce noise, which will vary with the bearing speed. If there is intermittent noise, it means that the rolling parts may be damaged. The sound of tapered roller bearing occurs when the damaged surface is rolled out. If there are pollutants in the bearing, it will often cause hiss, and serious bearing damage will produce irregular and huge noise.