Multistage centrifugal pump has at least one impeller driven by another, and at least two impellers are form-lock interconnected in drive engagement via mating spigots and slots

摘要

At least one(24,26,28) of the pump's impellers is driven by another(30), and at least two of the impellers are form-lock interconnected in drive engagement via spigots on the end face of the hub extension of one impeller, and longitudinally extending slots in the inner circumferential face of the hub section of the adjoining impeller. At least two of the impellers have an identical form.