Supporting > Engine Ancillaries
Centrifugal pump test
petertha:
Sorry for poor descriptions. When I mention 1" hydrostatic head, I meant that the inlet is only 1" above water surface in bucket & it failed to draw any water even though the pump & inlet tube was relatively primed.
Some better annotations.
petertha:
a section midway between throat plane & outlet plane transitioning from rectangular to circular
petertha:
I see my bearings are choking the shaft, maybe that's the problem Haha. I seem to be in between configurations but the pump / volute / rotor is the same as shown
Dave Otto:
I have never seen a self priming centrifugal pump, not saying they don't exist I just don't recall ever seeing one.
Dave
petertha:
I tend to agree Dave & that might be part of the issue. I tried to get the pump cavity relatively full before spinning the shaft, but its an ungainly affair. I hold the drill with one hand & hold the pump body with the other hand & hold the intake hose into the bucket with the third hand.... But I will try & ensure its fully flooded before rotating with split plane up so the inlet hose can dip into the water bucket. If I just pour water from the tap into the inlet with tube bent up, it free flows through the pump so I'm not really testing anything. I was hoping it would suck a moderate head, even 1"
I now have the motor mount & pump mount printed & ready to go on a board, but need to make a shaft coupler. And need to keep the liquid off the electrons.
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