Analysis of the reasons for vibration in the centrifugal pump outlet pipeline
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Recently, the outlet pipeline of the reboiler oil pump in my unit has been shaking significantly, and the handwheel of the outlet valve of the standby pump also vibrates. What are everyone’s opinions on the causes of this shaking in the pump outlet pipelines and possible solutions? Any additional insights would be appreciated. 1. The pump itself vibrates heavily (due to abnormalities such as cavitation or gas entrapment)； Caused by poor installation quality; the anchor bolts are not secure..... 2. Abnormal flow conditions within the pipelines (fluid pressure fluctuations) 3. The pump selected is not suitable for the operating conditions 4. ......
Bro, this is clearly resonance…
The flow velocity in the pipes is high, the pipeline layout is unreasonable, and there are many bends.
Since this fault has only appeared recently, it might be worth checking the suspension of the pump outlet pipeline; perhaps the support fittings have become loose. Also, check whether the operating conditions of the pump itself have changed; knowing which parameters have changed can help with the analysis.
Vibrations in export pipelines are often caused by low back pressure of the oil, improper piping design, and the formation of a gas-liquid two-phase flow due to oil vaporization. On the one hand, support and reinforcement are provided in areas where the vibration of the export pipeline is significantly high ； It is also recommended to increase the amount of reboiling oil.
There is a blockage in the pump inlet pipe, causing cavitation.
There is a blockage in the pump inlet pipe, causing cavitation.
It is estimated that oil and gas are escaping; there is air remaining in the pump, and within the pipes gas and liquid form a two-phase flow.