Fan vibration removal process- Diagnosis of looseness and unbalance

Bearing Vibration Condition Monitoring - پایش وضعیت ارتعاش بیرینگ ها- پایش صنعت کویر- نماینده رسمی موسسه موبیوس- Payesh Sanat Kavir Institute-Authorized Mobius Institute Partner — Bearing Vibration Condition Monitoring – پایش وضعیت ارتعاش بیرینگ ها- عیب یابی توسط تکنیک های مختلف- Diagnosis by Different Parameters – BC- Skew- BCU -HDM- dBM- SFx-Spike Energy- Peak value-Crest Factor- Envelope Parameter

Looseness is one of common defects that can be caused by excess design force.
Unbalance is one of the defects that the centrifugal force can cause many secondary defects, including looseness.
To fix the unbalance be sure to first remove all the secondary defects.
In the attached image, you can see that the unbalance has caused a loose between the bearing inner race and the shaft.
After fix the shaft loosening problem, the imbalance clearly showed itself.
After removing the imbalance, the vibration became normal.

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