This pipe vibrates very heavily; I hope someone experienced can give me some advice
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This pipeline runs from the outlet of the centrifugal pump to the inlet of the plunger pump, with a pressure of 0.6 Mpa and a temperature of 150 degrees Celsius. The centrifugal pump is the first-stage pump, while the plunger pump is the second-stage pump (with a variable-frequency motor). The current situation is that the greater the motor frequency of the plunger pump, the more severe the vibration. There’s definitely no issue with the flexibility of the pipes, which are coiled up; so where else could the problem lie?
Is the centrifugal pump not delivering enough flow? The pipe vibrates only when there is gas inside it, right?
After all this back and forth, I guess I need to calculate the frequency
Level 3 is supported; it seems that as the frequency of the plunger pump increases, the flow rate provided by the centrifugal pump becomes insufficient, resulting in a phenomenon similar to cavitation in the plunger pump.
Upstairs, that situation should be considered as finding some free time, right?;P
The sealing performance of the check valve in the plunger pump, and whether the flow rates of the centrifugal pump and the plunger pump are matched. Is there a buffer tank in the pipeline between the two devices?
The flow rate does not match; by appropriately adjusting the frequency conversion of the plunger pump while ensuring that the process requirements are met, it should be possible to find a balance point
The flow rate of centrifugal pumps is one order of magnitude higher than that of piston pumps. Does variable frequency operation of a plunger pump exceed the power frequency?
Upload site photos? Check if it’s a piping issue. . . .
It is recommended to add a buffer tank before the plunger pump