Steam Turbines - Shaft Manufacturing Process

We manufacture them as OEM- and sorry, none of the OEMs are going to detail the trade secrets.

If you buy from the OEM, you have to depend on their technology and processes.

And if you want to buy a steam turbine- we call it rotor- from other suppliers, then - I know what has happened in these cases.

And it is not the material of the shaft that is the main portion (of course it is critical)- but you have all other portions that have much more damage potential.

I have to agree with guest. I can't imagine ordering a steam turbine shaft from someone other than the manufacturer. He will know what the requirements are, since you obviously have no knowledge of the equipment. Having some knowledge of the materials of construction without understanding how it all works will only get you in trouble.

If you explain to the supplier that you are new to the field he will probably help you understand how things work. You are a potential sale and that's the name of the game.

Just explain that you have this assignment and need his help and chances are he will expand your knowledge of the systems involved.

Good luck.

While I agree with the above, most turbine rotors are some version of 4140

All our turbine rotors- except the low cost turbines (and they constitute single digit percentage) are alloy steels with Chrome, Ni, Mo and V

For obvious purpose- operating condition - temperature, fluid.

Also i checked up- our standard clearly mentions - "there is no national or International standard equivalent to it" in the reference section.

If you are looking to repair the shaft surface to install a new seal and have the proper surface for the seal, you could use an SKF SPEEDI-SLEEVE if your shaft is less than 8 inches. If your shaft is greater than 8 inches, you can use a large diameter waer sleeve.

I have to agree with everyone's comments so far. You Never ever try to dictate to a manufacturer what design changes you want him to make in HIS design. That gets into Product Liability. You can ask him what options they offer, what upgrades are available but any reputable manufacturer will walk away from a sale that you want to partially design.

To learn more about the elements, ask your salesman to arrange for a tour through the factory and ask your questions during the tour. It would appear that from your question that several tours might be in order and most vendors are happy to give them if they are proud of their work.

In some cases, i had made in aisi 4140 the shaft