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High Speed Shaft Balancing without 4-Run Balance Method

thread384-475860

High Speed Shaft Balancing without 4-Run Balance Method

High Speed Shaft Balancing without 4-Run Balance Method

(OP)
Hello everyone,

I have a high speed shaft which turns around 30.000 rpm. Normally I am using 4-run method but this method is time-consuming me pretty much. I know it is quite useful but It is quite time wasting, I mean one reference run + 3 times with changed position of trial mass is hard to do in my application. Do you have any suggestion to accomplish this process with additional sensor or application? I am just using vibration data from the shaft but I can use any sensor or application in my system.
Thanks in advance.

RE: High Speed Shaft Balancing without 4-Run Balance Method

What do you have for electronics in "in my system." ?

What electronics do you have available? Oscilloscopes, etc?

What is the nature of the "vibration data from the shaft" ? Overall, filtered 1X rotation , something else?

RE: High Speed Shaft Balancing without 4-Run Balance Method

Put a mark on the shaft and use an optical sensor to pick it up. This gives you a phase reference to the out of balance. You'll still have to do one run with a known trial mass as well as in the original state. I have no recommendation for software i just do it in whatever is handy.

Cheers

Greg Locock


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RE: High Speed Shaft Balancing without 4-Run Balance Method

(OP)
@GregLocock many thanks man, I read the same thing that recommends Helitune keyphasor sensor with reflective band.

@Tmoose Thank you for the answer. It has been solved!

RE: High Speed Shaft Balancing without 4-Run Balance Method

I assume you are using a Flexible Rotor and not Rigid Rotor balancing method!

Walt

RE: High Speed Shaft Balancing without 4-Run Balance Method

(OP)
@strong Yes both of sides are moving respectively.

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