The head of the vortex pump needs to be reduced, how to modify it?
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If the head of the vortex pump needs to be reduced, how to modify it? Is the only way to reduce the speed (except bypass)?
Cutting impeller, but the range is limited, check the performance curve of the pump
Increasing the gap between the impeller and the pump cover seems to reduce the head! This is the reason why the outlet pressure of one of our pumps becomes smaller, resulting in insufficient volume!
You can just make the impeller smaller.
If you want to reduce the lift of the pump you are using, increase the thickness of the pad between the pump cover and the pump body a little, and the lift will be reduced, but the power will not be reduced. The thickness of the pad should not be increased too much. It is best to try thickening it by 0.05~0.1mm each time. If it is a newly designed pump, the impeller diameter can be reduced.
Haha, the vortex pump is different from the centrifugal pump. The outer diameter of the impeller cannot be cut. To reduce the head, it can be operated at a large flow rate. If the flow rate is too high, it can be reversed. The shaft power will become smaller at a large flow rate. This is different from the centrifugal pump... Or the gap between the impeller and the side of the casing can be increased, but it is not easy to achieve.
Can you explain what the method of reducing the lift in the first paragraph means?