Vibration problem of the pump driven by the motor
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When the motor that drives the pump operates, the vibration frequency is not a straight line, but rather a regular hump-shaped curve, with waves appearing one after another. What is the reason for this? Please help to figure it out. Thank you.
It’s necessary to rule out resonance, a weak foundation, loose connections, and imbalance. It’s probably like two people playing their instruments separately, without coordination – like \"instruments that don’t play in harmony\" :lol
The situation you described is likely due to a weak foundation or an issue with the motor rotor.
First, check the current fluctuations under load； Remove the motor and check it by running it without load ； Measure the vibration frequency distribution to determine where the characteristic vibration points are ； If there are characteristic sounds, record them and use GoldWave to analyze the frequencies. --- Unstable without proper support, inadequate fastening of the foundation, improper flow patterns inside the pump... Data is the basis for analysis
Is it a new type of energy-saving motor? This issue has occurred with large motors of 6000V and over 150KW; it is mainly due to problems in the motor design – the motor’s own weight together with the insufficient strength of its base leads to vibration. The problem was resolved by reinforcing the base using channel steel and steel plates.
I’ll take a photo and show it to you when I go to work someday.
A motor running at 3000 rpm; the 2nd harmonic component and 100 Hz beat frequency can cause this phenomenon. Check whether the motor has loose feet or loose stator windings.
Check whether the rotation speed is 3000; what you described sounds like a waveform formed by the interaction of two frequencies that are very close to each other.