Submersible pump

A pump, comprising:

• a rotor comprising an impeller and a flow amplification body, wherein an inlet of the flow amplification body is in fluid communication with an outlet of the impeller, wherein a central passage of the flow amplification body includes at least one flow amplifying vane therein, wherein the impeller includes a sidewall at least partially defining an interior space of the impeller, wherein the sidewall includes at least one flow-inducing protrusion extending outwardly therefrom, wherein the at least one flow-inducing protrusion has a fluid flow passage extending therethrough, wherein the at least one flow-inducing protrusion has a leading edge and a trailing edge, and wherein the fluid flow passage of the at least one flow-inducing protrusion extends therethrough at the leading edge thereof.

A pump, comprising:

• a rotor comprising an impeller and a flow amplification body, wherein an inlet of the flow amplification body is in fluid communication with an outlet of the impeller, wherein a central passage of the flow amplification body includes at least one flow amplifying vane therein, wherein the impeller includes a sidewall at least partially defining an interior space of the impeller, wherein the sidewall includes at least one flow-inducing protrusion extending outwardly therefrom, wherein the at least one flow-inducing protrusion has a fluid flow passage extending therethrough, and wherein the interior space of the impeller is exposed to the central passage of the flow amplification body at the inlet of the flow amplification body.

A pump, comprising:

• a rotor comprising an impeller and a flow amplification body, wherein an inlet of the flow amplification body is in fluid communication with an outlet of the impeller, wherein a central passage of the flow amplification body includes at least one flow amplifying vane therein, wherein the impeller includes a sidewall at least partially defining an interior space of the impeller, wherein the sidewall includes at least one flow-inducing protrusion extending outwardly therefrom, wherein the at least one flow-inducing protrusion has a fluid flow passage extending therethrough, wherein a closed end portion of the interior space of the impeller opposite the downstream end portion thereof has a maximum inside diameter less than a maximum inside diameter of the interior space of the impeller at the downstream end portion thereof, and wherein the interior space of the impeller at the downstream end portion thereof has a maximum inside diameter the same as a maximum inside diameter of the central passage of the flow amplification body.

A pump, comprising:

• a rotor comprising an impeller and a flow amplification body, wherein an inlet of the flow amplification body is in fluid communication with an outlet of the impeller, wherein a central passage of the flow amplification body includes at least one flow amplifying vane therein, wherein the impeller includes a sidewall at least partially defining an interior space of the impeller, wherein the sidewall includes at least one flow-inducing protrusion extending outwardly therefrom, wherein the at least one flow-inducing protrusion has a fluid flow passage extending therethrough, wherein the at least one flow amplifying vane is a plurality of flow amplifying vanes;
• wherein each of the flow amplifying vanes has a cupped surface on a downstream facing side thereof, wherein a closed end portion of the interior space of the impeller opposite the downstream end portion thereof has a maximum inside diameter less than a maximum inside diameter of the interior space of the impeller at the downstream end portion thereof, and wherein the interior space of the impeller at the downstream end portion thereof has a maximum inside diameter the same as a maximum inside diameter of the central passage of the flow amplification body.

A pump, comprising:

• a rotor comprising an impeller and a flow amplification body, wherein an inlet of the flow amplification body is in fluid communication with an outlet of the impeller, wherein a central passage of the flow amplification body includes at least one flow amplifying vane therein, wherein the impeller includes a sidewall at least partially defining an interior space of the impeller, wherein the sidewall includes at least one flow-inducing protrusion extending outwardly therefrom, wherein the at least one flow-inducing protrusion has a fluid flow passage extending therethrough, wherein the at least one flow amplifying vane is a plurality of flow amplifying vanes, wherein the interior space of the impeller is exposed to the central passage of the flow amplification body, wherein a closed end portion of the interior space of the impeller opposite the downstream end portion thereof has a maximum inside diameter less than a maximum inside diameter of the interior space of the impeller at the downstream end portion thereof, and wherein the interior space of the impeller at the downstream end portion thereof has a maximum inside diameter the same as a maximum inside diameter of the central passage of the flow amplification body.

A pump, comprising:

• a rotor comprising an impeller and a flow amplification body, wherein an inlet of the flow amplification body is in fluid communication with an outlet of the impeller, wherein a central passage of the flow amplification body includes at least one flow amplifying vane therein, wherein the impeller includes a sidewall at least partially defining an interior space of the impeller, wherein the sidewall includes at least one flow-inducing protrusion extending outwardly therefrom, wherein the at least one flow-inducing protrusion has a fluid flow passage extending therethrough, wherein at least one of the at least one flow amplifying vane has a cupped surface on a downstream facing side thereof and the at least one flow-inducing protrusion extends outwardly away from the interior space of the impeller and extends from adjacent a first end portion of the impeller, wherein a closed end portion of the interior space of the impeller opposite the downstream end portion thereof has a maximum inside diameter less than a maximum inside diameter of the interior space of the impeller at the downstream end portion thereof and wherein the interior space of the impeller at the downstream end portion thereof has a maximum inside diameter the same as a maximum inside diameter of the central passage of the flow amplification body.