Vorecon

Do you have the operating & maintenance manuals, and have you contacted Voith (the OEM) already for documentation and guidance/training? Do you use the OnCare.Health Vorecon monitoring system?

It may be useful to state exactly what the problem/s are, what you have done so far and what the point is where you're getting stuck. These seem to be "hydrodynamic variable speed planetary gear for transmission of up to 50 MW and output speed up to 20 000 rpm" in the multi-MW range - specialist knowledge is crucial. (I am not that person - the above is just straight from the Voith website.)

Thank you so much for you’re reply , well , I am a development mechanical engineer which means I am still a graduate under training, as part of the training is to start troubling shooting myself. The problem statement is ( the working oil keeps burning ) maybe there is an issue with the compressor attached to this system. The learning journey is still going.

Your machine is connected between a power source and a power user.

The fluid coupling likely uses shear forces to transmit varying amounts of torque.

The shear forces create heat, more slip is more heat, generally.

So now, you need to figure out if you are:

Transmitting more power than it was designed to handle

Not cooling the fluid adequately for the amount of torque at speed

Is the actual slip higher than design for the torque required by the load, excessive input speed

Is the excess heat being coupled through either input or output shaft? The purchase specifications should confirm initial design.

Is the actual application using measured parameters within the original design parameters as shown on the install documentation, including duty cycle, average ambient temperature, speed range input or output, atmospheric pressure, humidity, anything that might affect heat transfer

Actual temperature rise of the fluid under documented production conditions

Compare actual fluid specifications to OEM specifications, it is common for people to make uninformed substitutions for fluids based on visual comparisons, especially if an emergency situation.

These are just a few of the general areas of investigation open to you, keep us informed!

We all like a good mystery….

I'm not a mechanical engineer but my steps would be.
Check what oil is specified by the manufacturer.

Go to the Purchasing Dept. and check they have ordered the correct oil.

When they have ordered a cheaper oil, then that is probably your answer.
Assuming the Purchasing dept. ordered the correct oil, next step is the wahehouse.
Do they have similar oils stored there and it maybe possible that somebody used the wrong oil by mistake?

Again, assuming they have different but similar oils in stock, find the maintenance guy and ask him what oil he put in by the last service, or if the storeman gave him the oil?
I know my answers are not based on mechanical factors but if you ask the questions you at least eliminate the non-mechanical aspects.
Further steps would be checking the correct amount of oil is being used and record how long it takes for fresh oil to burn and record the temperature and see if there are peaks and troughts or constant temps.
Are there "friction discs" in the Coupling ? These could be worn and require replacement... is a common occurance in limited slip differentials where the plates wear and it causes the oil to burn due to extremely slippage.

So far the compressor is running on a lower output power which mean ( the angle of the vanes is almost in close position ), the position of our guide vanes is almost 34%. We are killing out working oil ( it is burnt already ), what we are suspecting a process integrity issue ,is that the processed fluid inside the compressor is having a high molecular weight ( less power required, hence low power output) still this is a theory, under investigation.

So it appears you are operating in a high slip condition, if I understand your words. This is an operating area where there is the most heat developed in the fluid. The need for cooling of the fluid is highest.

Is this a new install, existing gone bad, or what has changed since install? This is often a useful differential analysis that can limit the scope of your search for the truth and facts.

The root cause of which you are hinting is not surviving your translation, at it sounds like a ridiculous cause in our language, and nothing that someone with your training would ever consider.

Voith component terminology would be useful to use, as that would provide a bridge between our languages.