The current of the multi-stage centrifugal pump is extremely high
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Our unit has a horizontal split-case multi-stage centrifugal pump. The designed head of this pump is 700 meters, and its rated flow rate is 55.5 cubic meters per minute. However, during actual operation, the actual flow rate is 37 cubic meters per minute, and the current drawn is close to the rated value of 324 A. What could be the reason for this? In fact, this pump has been operating at a low flow rate for a long time; previously it was operating at a flow rate of around 32 cubic meters, or even 30 cubic meters, and the current drawn by the pump was only 300A. Now that the flow rate has increased slightly, the current has become even higher. Could someone expert help analyze this? Thank you.
When such a phenomenon occurs, it should be considered from two perspectives: one is related to the process and the materials used, specifically whether there is an excessive amount of mud present； One aspect is mechanical; it should be disassembled for inspection. Oh, and the insulation of electrical appliances also needs to be checked. For reference.
What materials? The density is too high, isn’t it?
Methyldiethanolamine has a low density, 1.1
Methyldiethanolamine has a low density, 1.1
In terms of mechanics, only vibration during operation can be observed at the moment; the vibration level is very low, at just 0.6 mm/s, and there are no other abnormalities
The electrical specialists just can’t figure out what’s wrong; and even when they do identify a problem, we in the mechanical department don’t understand it either. It’s so frustrating.
The inspection of the direction is carried out in three steps; first, check the insulation on one side； Second, inspect the process medium ； Finally, it has to be disassembled for inspection.
Check his physical and chemical properties to see if changes in temperature and inhalation pressure are related to changes in viscosity.