FAG bearings shown in the use of its strong regularities, and repeatability is very good. Good quality roller bearings when used at the beginning, vibration and noise are small, but some scattered spectrum, amplitude is small, probably due to some defects in the manufacturing process, such as 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. Very rare more than three times the frequency spectrum, roller bearing is very stable and entered a period of stability.
Continue to run access using late, FAG bearing vibration and noise starts to build, sometimes appear abnormal noise, vibration increases more slowly, however, at this time, bearing kurtosis value suddenly reaches a certain value. In our view, when the bearing is characterized by early failures.
At this point, calls for strict monitoring of the bearing, pay close attention to the changes. Thereafter, bearing steep degrees value and began fast declined, and near normal, and vibration and noise began significantly increases, its increased significantly began speed up, dang vibration over vibration standard Shi (as ISO2372 standard), its Laura bearing steep degrees value also began fast increases, dang both over vibration standard, and steep degrees value also over normal value (available steep degrees relative standard) Shi, we think FAG bearing has into late fault produced, needed timely overhaul equipment, replaced bearing.
FAG bearings demonstrate advanced features to a serious failure (usually bearing damage such as sticking, burning, Sandy spallation, Raceway, wear beads and other) most of the time not more than a week, capacity of larger, faster speed, shorter intervals. Therefore, in practical bearings fault diagnosis once advanced features, should simply judge the roller bearing failure, arrange for repair as soon as possible.