Tapered roller bearings are usually separated, that is, the tapered inner ring component composed of the inner ring with roller and cage components can be installed separately from the tapered outer ring (outer ring). Tapered roller bearings are widely used in industries such as automobiles, rolling mills, mining, metallurgy, and plastic machinery.
The secondary reason for the scars of tapered roller bearings in the process of installation is: the bearing is being installed and assembled, and the inner ring and outer ring are skewed; or maybe the load is in the process of installation and assembly, and eventually the bearing scars are formed. .
When the tapered roller bearing is being installed, it must be stopped in accordance with the working specifications. If there are many achievements, such as the form of the device or the improper method, it will form the raceway surface and the bone surface of the bearing to form linear scars. The device of the deep groove ball bearing indirectly reflects the precision, life and function of the bearing in use.
Although the quality of tapered roller bearings is good in all aspects, rolling bearings are precision parts, and their use must be carried out accordingly. No matter how high-performance bearings are used, if they are used improperly, the expected high performance will not be obtained. Precautions concerning the use of bearings are as follows:
(1) Keep the tapered roller bearing and its surroundings clean. Even small dust invisible to the eyes can have a bad effect on the bearing. Therefore, keep the surroundings clean to prevent dust from entering the bearing.
(2) Use with caution. A strong impact on the tapered roller bearing during use will cause scars and indentations, which will cause accidents. In severe cases, it will crack or break, so be careful.
(3) Use appropriate operating tools. Avoid replacing with existing tools, you must use appropriate tools.
(4) Pay attention to the corrosion of tapered roller bearings.
When handling bearings, sweat on your hands can cause rust. Pay attention to the operation with clean hands, it is best to 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, an electronic stethoscope is used to detect abnormal noise of a certain part by experienced operators. If the bearing is in good running condition, it will make a low whine sound. If it makes a sharp hissing sound, tapered roller bearing, squeaking sound and other irregular sounds, it usually indicates that the bearing is in bad running condition.
Corrosion of tile surface: Spectral analysis found that the concentration of non-ferrous metal elements is abnormal; there are many sub-micron wear particles of non-ferrous metal components in the iron spectrum; the moisture of the lubricating oil exceeds the standard and the acid value exceeds the standard.
Strain on the journal surface: there are iron-based cutting abrasive particles or black oxide particles in the iron spectrum, and the metal surface has a tempered color.
Corrosion on the journal surface: Spectral analysis found that the concentration of iron is abnormal, there are many submicron particles of iron in the iron spectrum, and the moisture or acid value of the lubricant exceeds the standard.
Surface strain: cutting abrasive particles are found in the iron spectrum, and the abrasive particles are non-ferrous metals.
Fretting wear on the back of the tile: Spectral analysis found that the iron concentration is abnormal. There are many sub-micron wear particles of iron in the iron spectrum, and the lubricant moisture and acid value are abnormal.
Under liquid lubrication conditions, the sliding surface is separated by the lubricating oil without direct contact, and friction loss and surface wear can be greatly reduced. The oil film also has a certain vibration absorption capacity. The sharp squeaking noise may be caused by improper lubrication. Inappropriate bearing clearance can also cause metallic noise. The dent on the track of the outer ring of the tapered roller bearing will cause vibration and cause a smooth and crisp sound. If it is caused by the knocking scar during installation, it will also produce noise. This noise will vary with the speed of the bearing. If there is intermittent noise, it means that the rolling elements may be damaged. This sound of tapered roller bearings occurs when the damaged surface is rolled over. If there are pollutants in the bearing, it will often cause hissing noise. Serious bearing damage will Produce irregular and loud noise.
Bearing damage can be detected by hearing, but usually, the bearing must be replaced immediately when it has arrived. Therefore, it is better to use such as electronic condition monitoring equipment to break the operating condition of the tapered roller bearing in advance.
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