Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
(OP)
Bonjour
In the new gas treatment plant located in Algeria (JV), the first gaz was exported in the mid of December 2017) , two weeks ago from now , during the operation of the Solar turbine Generator it was happened a serious problem for two machines (09 MW by machine), that was the shearing bolts of the fixation of the coupling between the turbine and the generator
The investigation is ongoing to find the real causes of this failure by the Client /Contractor
May be someone met the same problem in the past that could give me his feedback about an idea about the failure , causes and the solution implemented to solve this problem definitely
Thank you in advance for your feed back
Best Regards
Djamel





RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
Do you have photos?
--
JHG
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
For a coupling failure within two months of startup, you should not be tearing apart the unit without their representative present, or they will resist assuming the warranty cost.
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
What led you to believe it was shear failure? Why not failure in tension?
Any chance it is fatigue related?
Any chance temperature played a part?
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
I wouldn't touch it without a rep on site.
This could be serious (alignment, balance, and so on).
= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
another day in paradise, or is paradise one day closer ?
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
Obtenir le représentant fabrique des turbines Solar la sur le site avant de vous toucher a rein sans eux il vous annulera cette garantie.
B.E.
You are judged not by what you know, but by what you can do.
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
Thank you for all
The plant is under the epccs contractor and the vendor is coming after tomorrow in aim to do the investigation.
The contractor team replaced the broken all bolts of those GTG and both are in operation.
My intention of the post of this problem is someone met a similar problem and could give us his feedback
Best regards
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
thread404-435953: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
EDMS Australia
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
With out photos it is pretty hard to diagnose the problem. However, a sheared bolt is 99% of the time due to over torque. The question is did you actually have a shear failure, with out pictures that will be tough to diagnose.
One thing I would definitely look into though is thermal growth, That can be incredibly destructive to couplings not properly selected. Again this is just speculation at this point, we really need some photos of the failed parts prior to disassembly. It is like a crime scene, don't disturb it until it is properly documented.
When it comes to couplings we are always here to help.
WWW.PSCCOUPLINGS.COM
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
Johnny Pellin
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
"Something" stopped one or the other high-speed machines so suddenly that the bolts sheared. That sudden force, or massive but slow counter-torque, almost certainly damaged one or both of the compressor and gas turbine attached to the couplings that failed.
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
If so, the reason for the overload would need to be identified
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
See the attached the sheared bolt photos
Regards
DG
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
When it comes to couplings we are always here to help.
WWW.PSCCOUPLINGS.COM
RE: Shearing bolts of the fixation of the coupling between the turbine and the generator (09 MW)
Perhaps I should have said SOME OF YOUR BUDDIES ON ENG-TIPS WOULD APPRECIATE a general arrangement drawing and nicely detailed pictures of the failed bolts' fracture surfaces and the couplings would be useful to mull over until the sheriff arrives.
thanks
Dan T