SKF maintenance technology commonly used three kinds of rolling mill bearing fatigue invalidation

SKF bearing fatigue failure is a failure surface form, main performance for fatigue crack initiation, expansion and fracture process, under the alternating load generated by the fault of the long-term effects of the metal. Seal of the rolling mill bearing using the special test of high quality lithium grease lubrication. This grease can withstand the high temperature of 120 degrees for a short period of time. If a stable working temperature of 70 degrees or higher, the standard of lithium grease will shorten the service life. Always work under high temperature, special grease must be used, but also pay attention to whether need to use heat resistant materials as sealing device. The use of standard contact seal temperature cannot exceed 110 degrees. The ability of bearing the load is much less than the same volume of rolling mill bearing, therefore, of the rolling bearing radial size large. So, under heavy load situations and demands radial size, structure compact occasion <> such as internal combustion engine crankshaft bearing, with SKF bearing. Bearing particularly sensitive to scrap metal and other foreign body, once with foreign body, can produce bigger vibration and noise in an intermittent, easy to cause damage. So the service life of rolling bearing has a certain limit. In short, some similar bearings is the shorter of the SKF bearing life. In high temperature often is in abnormal situation. High temperature also harmful to the bearing lubricant. Sometimes overheated bearings can be classified to the bearing lubricant. If the bearing temperature for a long time even the transfer of more than 125 ℃ lower rolling mill bearing life. The causes of high temperature bearing include: lubrication inadequate or excessive lubrication, the lubricant. Contains impurities, heavy load, bearing damage, clearance, high friction and oil seal and so on. Types of SKF bearing maintenance usually has the following three kinds: 1. Breakdown maintenance: in bearing failure occurs, stop the inspection and maintenance. 2. Regular maintenance: in order to guarantee the normal work of the host, according to the requirements of the host and the design of the bearing theory and experience, set up a maintenance cycle and preventive maintenance. 3. Warning: maintenance using advanced bearing fault diagnosis technology, the use of rolling mill bearing state real-time monitoring, forecasting is put forward, in front of the bearing failure for repair. SKF bearing in the process of operation, there must be sound, such as temperature and vibration phenomenon. Maintenance for the operation of the bearing, therefore, can hear, touch, and using the methods of bearing fault diagnosis instrument found bearing changes, whether judged by change the state of the rolling mill bearings are in normal working condition.