Positive displacement pump
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I would like to ask: for a reciprocating positive displacement pump using water as the fluid, why does the pipeline vibrate significantly during fluid transfer, and why does the outlet pressure fluctuate back and forth? Sometimes it's not good to observe the situation either; why is that?
1. The pulse itself is large. 2. No buffering facilities are installed at the pump outlet. 3. The pump outlet pipeline is not securely fixed.
A damper has been installed at the pump outlet; the pipeline is indeed not secure, but is this kind of vibration normal?
The vibration is abnormal and needs to be addressed.
It is normal for reciprocating pumps to have pulsations; measures can be taken during use to minimize vibration, such as: 1. Securing the pump feet, 2. Providing proper support and fixing for the pipes. 3. The pulse damper is installed directly above the pump outlet, as close as possible. The volume of the damper is large enough. 4. Try to reduce the pump frequency to avoid resonance.
I think what you said is absolutely correct; I’ve learned it