Decouple or not?

[corcodel]

We have to repair a thermo power unit with four coupled rotors. I must manage with a suggestion from my superior which I cannot deny it (do you imagine!).

Could you tell if I intend to change one of these rotors, it is absolutely necessary to decouple all that rotors for alignment and we should be confident in the existing one?

Thank you,
Garkonme

 

[Khan912]

Hi Garkonme,

For your equipment safety and reliability+availability, it depends. I would suggest you to decouple. If you think the alignment of others is ok. So you take them as a detum (subjected to your left one is moveable). Other than this you have to discouple and realign all the shafts.
Khan912