Correct judgment SKF rolling mill bearing operating law matters

Rolling mill bearing showed a strong regularity in the process of its use, and the repeatability is very good. Normal high quality bearing, at the beginning of the use of vibration and noise are relatively small, but there are some scattered of spectrum amplitude is small, may be due to some defects in the process of manufacturing, such as surface caused by burrs, etc. Movement after a period of time, maintain a certain level of vibration and noise, frequency spectrum is very single, only one or two times the frequency. More than three times the power frequency spectrum, seldom appears bearing condition is very stable, steady working period. Continue to run after the late into use, SKF bearing vibration and noise began to increase, sometimes a different sound, but the change of vibration increase is relatively slow, at this point, the rolling mill bearing kurtosis value began suddenly reaches a certain value. We believe that the bearing is characterized by the early failure. At this time, requires that the bearing is closely monitoring, pay close attention to the change. Since then, bearing kurtosis value began falling fast, and is close to normal, and significant increase in vibration and noise, it began to accelerate the increase, when the vibration more than standard ( Such as ISO2372 standard) , its bearing kurtosis value also began to increase rapidly, when more than vibration standard, and kurtosis value is more than normal ( Available kurtosis relative standard) When we think of bearing fault has entered the late production, should be timely maintenance equipment, replace the bearing. Late show bearing fault feature to severe fault ( For bearing damage, such as holding shaft commonly, burns, sand spallation, raceway, wear beads, etc. ) Most of time not more than a week, the bigger the equipment capacity, the faster the speed, the shorter the time interval. Therefore, in actual SKF bearing fault diagnosis, once found late fault characteristics, should be decisive judgment faulty rolling mill bearing, arrange inspection as soon as possible. Bearing the chamfer does not determine the quality of the bearing, but it reflects the bearing processing method. Chamfering is black, the heat treatment such as quenching, so increase the hardness of bearing, and some people think the chamfering is black not good-looking is not process completely, this is a myth. According to the sales experience found many clients as long as the quality of bearing surface brightness is good, this is wrong. Light should be on the surface of the rolling mill bearing is a kind of raven, of the cause of the raven is whether used in bearing steel standard and its cutting fluid used in the grinding process and etc, produced by the two before. Even the smiling face of dust into the bearing, invisible to the naked eye can also add bearing wear, vibration and noise. Directly with the hand take SKF bearing, and wash hands sweat, and then coated with high quality mineral oils suspended again after the operation, in the rainy season and summer to pay more attention to special protection. Under the premise that some kind of special operation, SKF bearing can be achieved with good at traditional battle debate, the life of a special is under the condition of light load. These special operation premise is, when the rolling surface ( Track and rolling piece) Can be separated by a lubricating oil film effectively and limiting pollutants can cause surface damage. In fact, on the premise of fantasy, the so-called permanent mill bearing life is possible.