Cause burns INA tapered roller bearing analysis and diagnosis skills

INA bearing state of burn injury refers to: the bearing raceway wheel, roller and cage in the rotation sharply fever until discoloration, softening, deposition and damaged. The main cause of INA bearings burns was due to bad lubrication of tapered roller bearing, may use the informal lubricant, or lubricant too much, too little, is not correct. 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 right bearing lubricant, and its dosage, and the choice of tapered roller bearing must be corrected. Study to cooperate, bearing clearance, and preloading, and improve the sealing device. Check the shaft and the precision of the bearing housing. Suggestions on INA bearings when using, 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 caused serious fault is often sudden catastrophic such as bearing adhere to sudden rupture, taper roller bearing inner and outer 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. As soon as possible, therefore, the actual monitoring and diagnosis, it is necessary to diagnose the INA bearing condition is good or bad, and change in time and inferior bearings, 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 INA 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 more high quality bearing at ordinary times 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 tapered roller bearing fault, prevent the equipment accident.