First  rolling bearing early evaluation

Our factory 6#  to pump motor maintenance in the new import bearings, after commissioning motor heat (around 78), suspected bearing quality, ready to repair. According to the test and analysis of spectrum , for vibration velocity is very small, ascertainable bearing no quality problem, just bearing clearance small, fever for temporary phenomenon, exactly can use. By long-term operation, confirmed that running bearings is good, have no heat phenomenon.

2 boiler ball mill motor diagnosis

5#  boiler replacement motor repair ball mill bearing,excessive vibtation, and a different sound, by test analysis  can see, bearing fault frequency and noise caused by the vibration of the harmonic speed has more than standard, belongs to the bearing quality is poor. INA bearing replacement qualified after normal equipment operation.

Second, degradation period check

When the vibration velocity, more than 3 MMS, if the frequency spectrum analysis with rolling bearing is confirmed KOYO need to strengthen monitoring bearing, for timely treatment to avoid the failure to upgrade.

From the spectrum charts (figure 3) see, TIMKEN bearing born of harmonic obvious noise, the bearing degradation, need to strengthen the monitoring, the timing of treatment.

As the vibration velocity more than 7 MMS (15 ~ 300 kW of rotating equipment) to change in time bearing, so as to avoid the equipment accidents.

 
If need to accurately diagnosed NTN bearing a, can use such as vibration of the 904 expert analysis software, put forward specific diagnosis report.
 



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