After the centrifugal pump impeller is cut, the flow rate increases and the outlet pressure decreases?
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After the centrifugal pump impeller is cut, the flow rate increases and the outlet pressure decreases?
It is estimated that this paper has not been strictly reviewed. I once encountered someone who posted the picture of my paper upside down, and it was in a relatively well-known domestic journal. I was so angry at the time that I even paid the review fee...
For this comparison parameter, a parameter must be set first. For example, when the pressure is the highest, can it reach the pressure before cutting, and then under this pressure, the flow rate can be increased to the maximum flow rate, and the comparison is under the same current state. Go back and compare the current at the maximum flow rate that can be achieved. Highlighting this list is power saving. Some people pay attention to the power saving at that time, but ignore the factors related to seasonal temperature changes. For example, if the high temperature in summer requires a large flow rate, what should you do if you cut off the impeller and it cannot meet the usage requirements? For reference.
Is his transformation a modified version of the import?
The current decreases, the flow rate and the pressure decrease.
After the impeller is cut, the lift of the pump moves downwards as the outer diameter of the impeller decreases. When the pipeline characteristic curve remains unchanged, the working point of the pump will move downward and to the left. This means that both pressure and flow rate decrease.
With this transformation, the flow rate increases and the outlet pressure decreases, which is consistent with the principle
After the impeller is cut, when the pipeline resistance curve remains unchanged (to be specific, the valve opening of the entire pipeline system remains unchanged), the outlet pressure and flow rate of the pump decrease. However, after the impeller is cut, if the valve opening is increased after the outlet is opened, the flow rate will increase and the pressure will decrease.