Multi-stage centrifugal pump
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Why can’t a multi-stage centrifugal pump start without fluid?
Centrifugal pumps need to be primed before starting; they cannot be operated without any fluid inside them. Refer to Chapter 3 of Chemical Engineering Principles, on Fluid Transport Machinery. It seems that one needs to study Chemical Engineering Principles thoroughly, haha
A vacuum must be created at the center of the impeller so that water can flow into the pump under the effect of atmospheric pressure
Reply to 3# xu*angqiao: If the pump is not fed with fluid, it will run idle; the lack of cooling medium can cause the pump’s seal to burn out, leading to leaks in the end
Multi-stage pumps are not used for pumping gas. Of course, it needs to be pumped in