What causes triple-frequency vibration?
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https://bbs.hcbbs.com/forum.php?mod=image&aid=1307380&size=300x300&key=50951cd1823da0ad&nocache=yes&type=fixnone As shown in the image, the vibration level is high after the modification of the pump impeller; the horizontal vibration reaches 6.8 mm/s, with a measured frequency of 149 Hz (rotation speed of 2950, single-stage cantilever centrifugal pump used as a reflux pump at the top of the distillation tower). The vertical vibration is lower, around 1.2 mm/s. What could be the possible reasons for this? After the modification, both the current and the outlet pressure increased
Inspect the water pump and motor bearings~~
The person on the 2nd floor is an industry professional who asked very professionally~~~ I was about to ask the same question~~~ I also want to inquire further about the technical modifications made to the impeller by the original poster
Has it been handled? This is the frequency of rotation of the impeller; what are the details of the technical modifications to the impeller? If both pressure and flow rate are high, it may be due to a deviation from the pump’s normal operating curve; trying adjusting the speed or valve opening could help.
The motor drives the water pump, and vibration at the 1st, 2nd, and 3rd harmonics is detected at the motor side – how to address this?