Bearing (mechanical)
PRODUCT
Through the contact friction state judgment FAG spherical bearing failure
by：Waxing
2020-10-31
Outside the spherical bearing is bearing the common failures and journal of dry friction contact, severe dry friction would result in higher FAG bearing temperature and oil temperature, viscosity, carrying capacity is reduced, have sticky tile, burning shaft, such as malignant accidents, even damage the equipment and personal safety threat.
Therefore, outer spherical bearing working state real time monitoring and fault diagnosis research widely attention.
Currently used FAG bearing fault diagnosis method has the following: (1) detection of oil temperature, bearing temperature and some physical parameters, such as oil, lub oil pressure wave;
(2) measuring axis trajectory, oil film thickness, the oil film pressure;
(3) light iron spectrum analysis and vibration analysis and so on.
These methods has its characteristic each, can to a certain extent, reflect the characteristics of the fault, but there are limitations.
If the vibration signal has the advantages of rich information, sensors, convenient installation, but the signal main energy is concentrated in the 1500 hz low frequency area, and the disturbance signal frequency is more for low frequency, so that the signal separation is difficult.
Acoustic emission signal is compared with the ordinary vibration signal, with a wide range of frequencies, a greater amount of information, fault diagnosis by using high frequency signal, can effectively eliminate the other low frequency jamming signal, so the high signal-to-noise ratio.
In addition sensor installation more convenient, also can be the operation state of the equipment condition monitoring.
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