Why does the pump experience severe vibration after being converted from a power-frequency type to an inverter-driven type?
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This post was last edited by 156026692 on 2018-10-26 09:35. Why does a power-frequency pump experience significant vibration after being converted to an inverter-driven type?
What is the frequency at which you operate it after switching to variable frequency? Is it because the rotation speed drops to a certain value, resulting in resonance with the foundation?
Vibrations often occur when it is between 75-80%, with an operating range of 70-90
Resonance is one factor; when the frequency is reduced, the speed drops. If the valve remains in its original position, it’s likely that the pump will operate at a high flow rate, which leads to vibration. It is recommended to adjust the valve simultaneously in order to change the pump’s flow rate, and see if the vibration improves. If there is an improvement, it is caused by this reason; please find the balance among the output frequency, valve control, and pump demand parameters.
Are you overclocking it? The normal operating frequency is 50HZ, and now it’s been overclocked to 70–90HZ?
No, I meant a percentage system; it was originally 70-90%
When the frequency is adjusted to 50Hz for use at the power frequency, does it still vibrate, or does it only vibrate at speeds of 70-90%? If that’s the case, it’s resonance
Only 75-80 represents vibration, but this range covers a relatively long period of time; it seems that the resonant frequency of the pump still cannot be changed arbitrarily: L
I’ve never heard before that when a water pump operates at variable frequency, it’s also necessary to adjust the valves! ! That’s so unprofessional!
This is a situation where one change can have far-reaching consequences; relying solely on reducing the speed is not sufficient. Reducing the speed means changing the pump’s parameters, and it is necessary to verify and adjust whether the pump can still function well under the actual operating conditions