Steam turbine bearing housing repair
Steam turbine bearing housing repair
(OP)
Hello,
I am looking for some advise about how to repair some craks on a cast iron NDE bearing housing next to ball bearing working area.
See attached file.
Regards.
M.D
I am looking for some advise about how to repair some craks on a cast iron NDE bearing housing next to ball bearing working area.
See attached file.
Regards.
M.D





RE: Steam turbine bearing housing repair
What you posted was a cross-section view of a turbine, complete with customer information. While it shows the general location of the bearing housing, it doesn't give any information about the types of cracks you're experiencing.
Patricia Lougheed
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RE: Steam turbine bearing housing repair
The document has 3 pages, see pages 2 and 3. Thank you very much for your help and interest
Regards,
M.D
RE: Steam turbine bearing housing repair
Patricia Lougheed
******
Please see FAQ731-376: Eng-Tips.com Forum Policies: Eng-Tips.com Forum Policies for tips on how to make the best use of the Eng-Tips Forums.
RE: Steam turbine bearing housing repair
You could try to weld repair by gouging out the crack, welding with a nickel based rod and then remachining. My concern would be that this is a high stress area which contains the thrust bearing (and probably the reason why it cracked in the first place).
Weld repairs of cast iron are not viewed (at least in my experience) as being structural. Thus I'd be concerned about future failure.
If it were up to me I'd simply buy a new bearing housing. You will spend a lot of money trying to repair it and still have a repair of unknown longevity.
RE: Steam turbine bearing housing repair
RE: Steam turbine bearing housing repair
RE: Steam turbine bearing housing repair
If you have urgent need and cannot afford the downtime to wait for the new housing, you have a few options. As already noted, you can metal stitch. I would prefer a fabricated solution. I would have our machinist cut out the affected area. He would make a bolt-in insert which could be machined in place back to the original dimensions. This would restore the critical fit of the thrust bearing within the housing and would probably be stronger than the original cast iron pocket. Depending on the final design, I might consider this a permanent repair. But, I would most likely order a new housing anyway.
Johnny Pellin