Centrifugal fan, four vibration probes, one is on the high side
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Yes, there are no problems: the bearing clearance is normal, the thrust is normal, the oil temperature is normal, and the probes are functioning properly. Please, experts, help diagnose this and advise on how to deal with it
Has the operational load changed, has the oil temperature changed, what is the quality of the gas, and could dust be the cause of an imbalance in the rotor’s dynamic balance? There is also the levelness of the rotor installation. If it remains within the scope of current processes, it can continue to be used; meanwhile, pay attention to identifying the cause and keep a close eye on the situation.
This post was last edited by sdwfsgyykai on 2018-6-13 at 16:46. 54 isn’t that high either; usually, shutdown occurs at 110, right?
What are the two points measured on this single bearing, and why isn’t the difference that large?
Check whether the vibration amplifier is damaged and whether the wires are loose
Not calling the police isn’t that serious! ! ! !
Did it appear after a recent major repair? Is it still the same old problem?
This can be diagnosed by swapping the vibration probes; loose connections are usually the cause of this phenomenon. After swapping the probes, observe according to the situation; generally, there will not be a single abnormality. Current equipment diagnosis technologies can determine whether the vibration is caused by an imbalance in a certain part of the bearing or the impeller!
Check the instrument to see what the distance from the measurement point is, and determine whether readjustment is needed
It’s best not to replace the instruments. Once, the axis of the centrifuge shifted significantly, and it was recommended to replace the instrument; this replacement was carried out without notifying the supervisor. Afterwards, a bypass system was used. Upon further consideration, it became clear that with a two-out-of-two redundancy setup, if one instrument fails, at least the other should still function properly. If both instruments could be inaccurate, things would get more complicated, so it’s better to let the supervisor make the decision