NSK bearings used its strong regularity in the process, and very good repeatability. Normal high quality bearings (bearings) when used at the start, vibration and noise are small, but some scattered spectrum, amplitude is small, it may be due to some defect in the manufacturing process, such as caused by Burr on the surface.
Movement after a period of time, to maintain a certain level of vibration and noise, spectrum is single, only Yi、erbei frequency. Rare three times more than double the frequency spectrum, NSK bearings are very stable, entered a period of stability.
Continue to run into use later, NSK bearing vibration and noise began to increase, sometimes abnormal noise, but changes in the vibration increases more slowly, at this time, bearing kurtosis value suddenly reaches a certain value. We believe that the performance for the early failure of the bearing.
In this case, requires that the bearing can be closely monitored, pay close attention to the changes. Thereafter, bearing towering degrees value also began fast declined, and close to normal, and vibration and noise began significantly increases, its increased significantly began accelerated, dang vibration over vibration standard Shi (as ISO2372 standard), its bearing towering degrees value also began fast increases, dang both over vibration standard, and towering degrees value also over normal value (available towering degrees relative standard) Shi, we believes that bearing has entered advanced fault etc, needed timely overhaul device, replaced bearing.
NSK bearing fault feature to demonstrate advanced serious failure occurs (usually bearing damage such as axle, Burns, Sha spallation, Raceway, beads to wear) most of the time not exceeding one week, device capacity larger, faster speeds, shorter intervals. Therefore, practical in bearing fault diagnosis, once advanced fault feature, there should be decisive judgment bearing failure, as soon as arrangements for inspection.
Use factors mainly refer to installation and adjustment, maintenance, maintenance, repairs and other compliance with technical requirements. Depending on the bearing of the installation, use, maintenance, maintenance technical requirements, NSK bearings in the running to take the load, speed, temperature, vibration, noise monitoring and checks and lubrication conditions, abnormal findings immediately find the cause to adjust, bring it back to normal. Installation conditions is one of the leading factors in the use factor, bearing package is often caused by installing is not the right state of change between the various parts of the bearing, NSK bearings under abnormal operation and early life
NSK bearing service life analysis of tasks, is based on the large amount of background material, analysis of data and failure mode, identify the main factors causing bearing failure, so targeted for improvement measures, extend the period of service of NSK bearings, avoid unexpected early bearing failure.
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