Activity

Reply by Rotating Guy

Dear Ali, With regards to your given plot and in the absence of other plot like polar, orientation and etc of probe, i assume that the...
Rotating Guy

Reply by William_C._Foiles

A couple of points (leave out the o and that would be a couple of pints), there is more than one type of frame 9; this will make a...
William_C._Foiles

Reply by John from PA

Quoting from the book Rotordynamics by Agnes Muszynska "Virtual Probe Rotation - A mathematical transform of vector data from an...
John from PA

Reply by aziz58

Dear john Can you please explain more about virtual probe and split critical.may i face this state at frame 5 and 6 Thanks

Reply by John from PA

As best I recall, the frame 9 generator probes are 45° left and 45° right. It is entirely possible you have a split critical. You might...
John from PA

Reply by ALI HAIDERR

Thanks all It is Generator rotor directly coupled with frame 9 Gas turbine. It is coast down data taken by proximity probe of system 1.

Reply by Walt Strong

John, I read OP fast and assumed it was a motor rotor. I will wait for the details of the actual machine and measurement details. Walt

Reply by John from PA

Walt, point well taken on motors but the OP does not refer to a motor, he refers simply to a rotor. I have frequently worked on large...
John from PA

Reply by aziz58

For determine critical frequency recommended to get coast down bode plot becouse to eliminate effect of transient force or internal...

Reply by Walt Strong

The OP states "Critical Speed" which is sometimes referred to rotor critical speed or balance resonance when the rotor has distinctive...

Reply by Shurafa

I agree with John. To answer your question with confidence, I would look for information, other locations and plot types such as polar.
Shurafa

Reply by John from PA

I'm guessing this is a multiple choice question off some examination so it probably is best to share the possible answers. This isn't...
John from PA

Reply by Harald

It appears to me that your production planners have it backwards. Maintenance based on condition monitoring needs to be the lead for...

Reply by aziz58

Thanks . I try to find them. But you mean that is maybe related to design problem of motor?can you explain more about certain...

Reply by Shurafa

I agree with the others as they are asking to specify what signal caused the motor to activate the shutdown. Did the motor trip on high...
Shurafa

Reply by Bijoy pradhan

Dear Rotating guy and Mateso Lugodisha , Motor capacity : 55 kw Tripping Point and high Current : 70 amps High Vibration : 4.5 mm/sec...

Reply by Mateso Lugodisha Sahan

Hi Bijoy, What is motor capacity? What driven by gearbox ? and also what tripping point ? high vibration or high current? What power...

Reply by Rotating Guy

Hi Bijoy, What is the tripping point? high current? vibration? try check the OL setting, also what is the driven by the gearbox?
Rotating Guy
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