Steam turbine test
Steam turbine test
(OP)
I would like to know, the importance of asking a vaccum dynamic balance whem specifying a steam turbine
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RE: Steam turbine test
Another reason is to take out any windage caused from not the wheels not being enclosed in a housing.
Different types of wheels or coupled wheels produce strange dynamics in air.
RE: Steam turbine test
Here is a link to a good article on why one would balance at operating speed versus low speed balance:
http://www.regencoservices.com/WhyHighSpeedBalance.htm
I would recommend dealing with TurboCare in Houston:
http://www.turbocare.com/docpdf/Compressor_Tech_Article...
Regards,
Dave G.
www.reliabilitydirect.com
P.S. A note to SPLIT - it is against forum policy to ask the same question in multiple forums.
RE: Steam turbine test
Will you please give me the area in this web-site that sets the policy that you refer to? I have seen comments like this before. Honestly I have tried several times to find the forum policy section --- I spent significant time doing so and found nothing.
I just went to the site policies area again and it only deals with vendors/regulators, disclaimers, and responsibilities of some types of members.
I have no doubt that these policies exist but it is hard to follow the rules if you don't know what they are.
I have confidence that you can provide this info as you have ststed that it is a policy.
Please give guidance---
ietech
RE: Steam turbine test
Don't click on it but slide your cursor over the
Inappropriate post?
If so, Red Flag it!
at the bottom of your reply.
This keeps people from posting the question in every Forum or as one might say "Spamming" the Forums. Most member's time, including yours, is quite valuable so one question at a time on one Forum is the way for more people to get assistance.
RE: Steam turbine test
Thanks, never noticed it before. I searched FAQs, site policies etc to find the rules. It's good to know where they are.
ietech
RE: Steam turbine test
The experts who can answer such questions tend to subscribe to a variety of different forums, so they'll tend to such these questions, even if there is only a single posting.
TTFN
RE: Steam turbine test
The thing that is specified is the balance speed. Always go for full speed unless unusual circumstances, or cost make it impractical.
A full speed air test would be impractical on many turbines as it could wreck the final stages, or the shaft, or both due to excessive power/torque requirement. So the vendor either has to have a boiler of sufficient capacity/condition to run the turbine, or he is required to request a vacuum balance run.
The vacuum balance also ensures that a vacuum can be held while the shaft spins; provides an informal (i.e. you wont get any results) test on the shaft gland capability.
Cheers
Steve