Activity

Reply by DBTCMP

@EngineerZaheer? so you reckon there is more merit in doing oil analysis in these type compressors? i do monitor units in a dairy plant...

Reply by OLI

If you have a coupling you can try adding weights there just to verify and if it works good enough they may be kept or motor moved to be...
OLI

Reply by KarlG

Further I have attached the time spectrum measured at DE side in vertical and transvers direction

Reply by KarlG

Hello, balancing yes but difficult , motor must be removed, there is no access to the rotor. I did some phase measurements between NDE...

Reply by OLI

Normal in such case is that something is loose alternative is that the speed selected for unbalance is "unlucky" test another speed. You...
OLI

Reply by Reginaldo Vieira

Petros Greetings I am very interested in buying your device, please contact me through the email registz@hotmail.com to close business.

Reply by Reginaldo Vieira

Petros Greetings I am very interested in buying your device, please contact me through the email to close business. Thank you.

Reply by Ngo Dinh

Yesterday, I do balancing for this rotor but it is very unusual when the appeared value of unbalance on machine is not the same with...
Ngo Dinh

Reply by OLI

Normally the fan is a part of the motor rotor or in some cases not normally vertical it is also a part of the gbx. To cut it short, I...
OLI

Reply by OLI

Yes you can likely make it better with balancing but unbalance is a force that is the same in all radial directions and if you get many...
OLI

Reply by Ngo Dinh

How the spectrum look like?. You use sleeve bearing so which type of bearing do you use: lobe bearing, lemon bearing, offset bearing...?
Ngo Dinh

Reply by Ngo Dinh

This pump is vertical pump, small one using SKF 7311 BECBM, 6212 C3 with oil mist lubrication . The length of shaft is about 808mm (you...
Ngo Dinh

Reply by KarlG

I did not replaced the sleeve bearings, I saw pictures only. The motor was running uncoupled during the test.

Reply by Motorman1969

My guess is balance issue in the motor. Seen a few two pole machines need re-balance. What were your tolerances of the bearing to shaft...

Reply by OLI

So how old are your damper/isolator? +10years?, 10 years are the manufact exchange interval. Was it original, how was it calculated? I...
OLI

Reply by KarlG

It's not a VFD, picked up with an optical sensor and reflecting tape. Right under the DE footage is a vertical support on both side,...

Reply by John from PA

KarlG posted: ...the motor RPM should be 3600 / 3585 but measured at 3607 RPM, power is 820 KW. Karl This is not related to your...
John from PA

Reply by OLI

Seems your mount is a beam design so either you have a resonance or your beams have changed properties by cracking or loosening so you...
OLI

Reply by KarlG

Hello again and thank you, I have attached the pic of the motor as well as the measurements at the DE side in vertical and transverse...

Reply by OLI

Yes my suggestion was not to use the builtin function but as you did, do it manually. I think this password is standard in the machine...
OLI

New Member

WGE

Reply by Ngo Dinh

Thanks Oli for your sharing. This pump is small vertical pump with speed 2960rpm. I am try to get the residual unbalancing to G2.5...
Ngo Dinh

Reply by RE-Engineer

Take the phase measurement between the motor and the base in the vertical direction, if it is 180, suspect some structural looseness.
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