Fault Rule of Rolling Bearings
Rolling bearings play an important role in the operation of various mechanical equipments and machines, and they are an important part of machine tools. Therefore, the quality of rolling bearing operation has a direct impact on the continuous operation of the machine tool, and the failure of the rolling bearing has a direct impact on the normal operation of the machine tool. The following describes the faults and causes of rolling bearings.
1. Early Wear. Proper bearing installation, proper lubrication, and bearing clearance will reduce early wear of rolling bearings. The main factors that contribute to early wear are improper bearing installation, improper lubrication, bearing overloading, pollution of rolling surfaces, shock load, etc.
2. Noise. Bearing noise not only affects the life of the bearing itself, but also can cause damage to other parts of the machine. Rolling bearing noise is caused by uneven wear, poor lubrication and improper clearance during installation.
3. Runout. Runout is a kind of mechanical fault, which usually occurs when the bearing rotates. In addition to causing vibration and noise, runout also reduces the wear resistance of the bearing. The main cause of runout is the interference fit of the bearing, improper bearing installation and the deformation of other parts of the bearing.
4. Overheating. When the temperature of rolling bearing rises, the lubricating oil breaks down, resulting in the decrease of lubrication effect, and the wear of the rolling bearing increases, resulting in the shortening of the life of rolling bearing. The main reasons for the overheating of rolling bearings are as follows: too much bearing clearance, too low bearing clearance, improper bearing lubrication, too much bearing load, etc.
5. Seizure. Seizure phenomenon is generally between the rolling elements and the raceway surface of the bearing, that is, the sliding contact between them is no longer free, caused by the formation of a portion of solid matter in the lubricating oil, so that the bearing does not have enough lubrication.
In summary, the common faults of rolling bearings include early wear, noise, runout, overheating, seizure and so on. To ensure the normal operation of the machine and improve the service life of the rolling bearing, we must pay attention to the installation, lubrication and other factors of the bearing.
