I’m facing a difficult problem: the vibration issue of the rotary jet pump
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As mentioned by RT, I recently encountered a rotary jet pump. It’s relatively fine when it’s placed directly on the test bench, but when mounted on a welding base, the horizontal vibration in the area of the drum – especially at a rotation speed of 4300 – can reach 10 mm/s. Does anyone who has worked with rotary jet pumps have any analysis to share? Study*Study*
This post was last edited by 3983596_FPPZ on 2019-5-17 08:48. To determine the cause of the vibration, please check: 1. The base is not securely fixed, or there are loose components； 2. The piping is not securely fixed, causing vibrations from the piping to be transmitted to the pump ； 3. Poor balance of the pump’s rotating components ； 4. Uneven stress on hydraulic components ； Vibration occurs during rotation ； 5. The bearings do not provide accurate positioning and limiting of the rotating components ； 6. Poor coupling alignment ； 7. Resonance occurs when the natural vibration frequency of the housing or bracket is close to that of the rotor ；
It is recommended that, if possible, a spectral analysis of the vibration components be performed.
Are there specialized units for spectral analysis?
1 2 3 4 5 6 – we’ve ruled those out all; I’m not very familiar with resonance···
Could you measure the spectrum? Also, please provide pictures from the site so I can analyze it for you.
There may be interference between the rotating components and the fixed components, which also needs to be ruled out.