INA regularity in the operation of the miniature bearing fault handling technology

INA bearings exhibit strong regularity in the process of its use, and the repeatability is very good. Normal quality miniature bearing, at the beginning of the use of vibration and noise are relatively small, but there are some notorious of spectrum amplitude is small, may be because of 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 on the frequency. Little more than three times the power frequency spectrum, on the miniature bearing status is not random, enter not disorderly working period. Inheriting run late into use, the bearing vibration and noise began to increase, sometimes on the different sound, but the change of vibration increase is relatively slow, at this point, the bearing kurtosis value began with reaches a certain value. We thought, this time the bearing that is characterized by the early failure. The second is probably too big load ( Preloading is too big) 。 Speed is too large. Clearance is too small. With water or other foreign matter invasion. If the above two cases are not the shaft, the accuracy of bearing box, shaft deflection. See here, I think everyone wants to know the solution, first of all, to study lubricants and lubrication method, choose the miniature bearing lubricant, and its dosage, and the selection of the bearing must be corrected. Study to cooperate, INA bearing clearance and preloading, and improve the sealing device. Check the shaft and the precision of the bearing housing. Advice when used in bearing, pay attention to the installation, lubrication, to achieve accurate as far as possible clearance and so on each link, in place. And these flows bearing serious fault is often caused by sudden catastrophic such as bearing frame suddenly rupture, INA bearing inside and outside the circle deflagration fracture, etc. , now because of counterfeit bearings will inevitably enter the enterprises and equipment. These failures will cause the rotor shaft, the person that weigh cause rotor or scrapping. I practice in recent years, often encounter such a situation. , therefore, the actual monitoring and diagnosis, it is necessary to diagnose the bearing as soon as possible state of good or bad, and change in time and inferior miniature bearing, to prevent big accidents. A lot of this kind of accident, also accumulated some practical skills, is this kind of bearing in the early part of the device after operation, monitoring the status of vibration, spectrum analysis was carried on. Found bearing at the beginning of the run, and its frequency spectrum has its unique characteristics, namely the equipment power frequency is generally not of ingredient. But the vibration value is not big, with the vibration standard ( Such as ISO2372 specification) Determine vibration is qualified to cause me alert, at this time. This state indicates that the defects in bearing components, etc. , its failure is often very fast and very suddenly. In case that in two hours after measuring the figure rotor shaft. Must pay attention to the accumulation of at ordinary times more quality INA bearings in the normal running of the equipment on time domain, frequency spectrum and vibration diagnosis of these fake bearing failure. Facilitate timely diagnose appear such abnormal spectrum in the miniature bearing fault, prevent the equipment accident. Show the advanced bearing fault characteristics to the serious fault on the ( For bearing damage, such as holding shaft commonly, burns, sand spallation, raceway, wear beads, etc. ) Most of time not more than a week, equipment capacity is larger, the faster the speed, the shorter distance of time. Therefore, in actual INA bearings fault diagnosis, once found late fault characteristics, should firmly determine bearing fault, inspection arrangement as soon as possible.