INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

Subsynchronous vibration phenomena in Steam Turbine

Subsynchronous vibration phenomena in Steam Turbine

(OP)
We are operating a 30MW condensing Steam turbine supplied by Siemens. Machine installed in 2006. We have noticed that the presence of sub synchronous vibration phenomena in 2010. After that once machine stopped/tripped and restarted, SS vibration got vanished and the overall vibration level also came down. With continuous running the machine vibration will increase slowly, upon vibration analysis, we could notice the SS vibration contribution (88Hz). Twice we opened the turbine and inspected (Aug 2015 & Dec 2016).
Now Again the SS vibration phenomena started and Shaft vibrations are fluctuating from 30 to 60 microns in turbine front and rear bearing.

Process parameters are almost stable

Any body throw some light on the alien frequency 88Hz source.

Turbine speed - 7059 rpm, Generator - 1500 rpm

Venkatesh

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close