Part 24 - Rotor Balancing (of rotating masses)

[@RotorDynamics]

Your support means everything to us. If you find value in our videos, please consider sharing them with someone who would benefit. Thank you so much!

[@mariodominguezaguilar5968]

Many thanks!, nicely put; still have to see the rest of your videos but it would be great if you could comment on the high speed balancing procedure and some of these topics: - balancing machine bearings (sleeve bearings, not always the actual tilting pad job bearings) - pedestal stiffness vs actual turbine pedestal stiffness, (is the test HSB vibration amplitude representative of what will be later seen during machine operation? - though not an API criteria, many users actually want to see the eddy current vibrations amplitude during HSB, as that is what trips the machine later on, and ask for very low amplitude after the test… HSB is sometimes seen as a preliminary “factory acceptance test” Again thanks for the effort in putting all these videos together, they are incredibly educational!

[@RotorDynamics]

Thank you for your thoughtful comment and valuable suggestions! I'm glad to hear that you find the videos educational. Your topics on high-speed balancing procedures and specific aspects like balancing machine bearings, pedestal stiffness, and eddy current vibrations are excellent suggestions. I'll definitely consider covering these topics in future videos. It's great to know what specific areas of interest my audience has, and I appreciate your input. :)

[@Reach1e]

Hi, if the rotor is operating above second critical speed with rocking mode, is it sufficient to perform only a lower speed balancing? Thanks

[@RotorDynamics]

That's a great question! If your rotor dynamic analysis primarily shows rocking modes, low-speed balancing might be sufficient. However, if the separation margin with the flexible mode is limited (check out Part 7 and Part 9 for more details), it's generally advisable to perform high-speed balancing as well. This ensures you address the rotor's behavior throughout the entire operating range.