Vibration analysis , measurement , for fans in cement industry
I will divide this post to three essential parts
1- what are the fans that should be analyzed on daily basis ( 24h/day )
2- the importance of the Vibration analysis for fans in cement industry
3- what are the recommended equipment that should be used for the vibration analysis
the fundamental fans that should be analyzed on daily basis are
1- the cement mill fan ( the cement mill fan is induction fan , its location is behind the cement mill main big filter.it’s main task to withdraw the cement from the cement mills and be collected in the bag filter to be shocked by air pulse to make the cement particles fall in screw conveyors to be transferred to the cement silos.
so this fan cannot stop we must take good care of it and spoil it and keep it clean and happy. 🙂
first you should check the fan Motor. and check if there is looseness problem or not. and check the main bearings.then you should measure the axial vibration. usually the problem will be in
- Motor outboard bearing looseness.
• Both fan bearings looseness.
what is the solution ?
• Check the motor outboard (free) bearing for excessive clearance.
• Check the impeller periodically for any accumulated material.
• It’s highly recommended to change both fan bearings and housing.
• Check the fitting between the bearing and shaft and the bearing with the housing and
realign the coupling.
• Check the coupling from any defects or wear.
• Check the locking nut from any looseness.
• Check the run out of the fan shaft may cause excessive axial vibration.
the below image show real life example for the points that should be tested. and if you want to send to me your test results to Judge it for you , I will be more than happy. just send an email to firstname.lastname@example.org
the other fans that must be checked daily are
cooler small fans ( air canons ) , ID fan , bypass fan.
ok now I will talk about the vibration analysis for fans for cement industry
if you didn’t maintain your fan in the optimum vibration range. you put your life and all the workers life in danger because accumulation of cement on the fan rotor or any thing cause misalignment will lead to catastrophic incidents.kindly be informed that it’s you responsibility to save workers life .
in my honest opinion preventive maintenance engineer is responsible about planet safety more than the main safety Engineer.
the last part.
which equipment you should use to do Vibration analysis ?
1- there are manual devices
2- there are automatic devices
3- there are robots that measure and deliver results to your CCR ( centeral control room )
for more reference about the equipment please refer to the below links
Vibration diagnostics of cement plant machinery
if you have any questions or want the range of vibration reading please don’t hesitate to contact me
I work every day 12 hour per day even in the week end
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