I have a couple of 500 hp vertical pumps. Wastewater application, they are series centrifugal pumps. The pumps vibrate excessively readings are above 1.0 in/sec at 3 times turn speed. They have 3 vane impellers. Bump test indicates a natural frequency of the pump bearing case at 3 times turn speed. How do I go about stiffening the pump case to change the natural frequency, or what would be the alternatives to stiffening.
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.
Engineers and analysts specializing in computational fluid dynamics (CFD) engineers need the right turbulence model for the right job. Which of the dozens of models available is best for your application? Download Now