The pump vibrates heavily
Thread Content
After using the horizontal pump, it was found that the vibration at the coupling end was greater than that at the impeller end. Why is this?
1. The main reasons for excessive vibration include: (1) rotor imbalance; (2) damaged bearings; (3) too low flow rate; (4) low inlet pressure; (5) bent coupling; (6) loose foundation or anchor bolts; (7) contact between the pump’s rotor and stator; (8) debris entering the pump. 2. Treatment methods: (1) Switch the pump and contact a fitter for repair; (2) Increase the flow rate; (3) Raise the inlet pressure.
What type of pump is the original poster using? A double-support pump? What are the specific vibration values?
Cantilever centrifugal pump, vibration at 4.5-5.5 mm/s
If the horizontal vibration is high, consider the assembly tolerances first; if the hammer vibrates greatly, check the tightness of its installation
This post was last edited by 3983596_FPPZ on 2018-10-30 at 12:58. I really didn’t expect it to be caused by misalignment of the couplings The cause of the problem has been identified: a misalignment of 0.3 mm, and the fault has been resolved. The assembler shall be fined thirty lashes
We have a unit here that is in the same situation; the vibration level reaches 12 mm/s. Initially, it was thought that the design margin was too large, but even after cutting the impeller, the vibration level remained at 5.2 mm/s. We have checked everything that could be checked, but we still don’t know what’s causing this issue.
It’s useless to finish school at the center; the situation remains the same.
The best approach is spectral analysis
At present, our company does not use much spectrum, and we also lack relevant technologies; it is undeniable that spectrum analysis is indeed useful.
If the quality of the pump is poor, it’s also difficult to identify the cause after analyzing the spectrum