Imported bearing breakdown maintenance - bearing knowledge

Is simple and easy diagnosis, in the vibration detection by testing is usually something the size of the vibration parameters, and the standard values ( Threshold) Comparison to determine the state imported bearing, in the simple diagnosis on locomotive bearing imports, mainly choose the time domain wave kurtosis coefficient parameters of KV acceleration RMS Xrms two indicators as fault diagnosis parameters, including kurtosis index KV is a dimensionless parameter, sensitivity to the early failure of imported bearings, and is not sensitive to operating conditions, when the imported bearing failure of tooth surface work surface, turn every week will have the impact of face defect pulse, the greater the failure, the shock response amplitude, the greater the KV value rise faster, but with the imported bearing fault serious deterioration in the late while the KV value declined, and has a value, on the other hand, it is sensitive to early failure is not enough, but as the imported bearing fault degradation increased continuously, has good stability. In short, to achieve a simple diagnostic confidence a fruit, at the same time using kurtosis coefficient and has a value is appropriate, it both the diagnosis parameter sensitivity and stability. Traction motor imported bearing ground detection threshold of dongfeng 4 locomotive axle box bearing import crown chakra simple diagnostic detection threshold method has a good side, but there are also many shortcomings, when simple diagnosis import bearings, of the following would happen; ( 1) Imported bearing parameter value has a fault, the fault positions but not sure. ( 2) Imported bearing trouble-free itself but due to the fault resulted from the assembly, ( Of the dynamic imbalance, such as rotor shaft to touch the ground, etc. ) 。 ( 3) On the base, the measured fault signal is strong with the weak ( Minimum inner ring, roller is stronger, the outer ring is larger) , so according to the parameter error is produced. Through the above three kinds of situation analysis, simple diagnosis is imported bearing component fault method without judgement, can not solve the problem of 'as' maintenance, so the import bearing diagnosis through the simple diagnosis only judge for XXX is not enough, must be precise diagnosis. When the imported bearing problems, the first idea should be check the maintenance, and not to replace. Today, we will put the world's top imported bearing is introduced the commonly used maintenance types. Usually imported bearing maintenance type has the following three kinds: 1. Imported bearing breakdown maintenance: in imported bearing failure occurs, inspection and maintenance downtime. 2. Regular maintenance: imported bearing in order to guarantee the normal work of the host, according to the requirements of the host and the use of imported bearing design theory and experience, set up a maintenance cycle and maintenance on a regular basis. 3. Imported bearing maintenance warning: using advanced imported bearing fault diagnosis technology, the use of imported bearing state real-time monitoring, put forward in front of the imported bearing failure forecast, for repair. Imported bearing in the process of operation, there must be sound, such as temperature and vibration phenomenon. Therefore, for the imported bearing in operation maintenance, can hear, touch, and imported bearing fault diagnosis instrument method is used to find anomaly change of imported bearings, according to the change of state to determine whether imported bearing in the normal working state.