Submersible pump unit
AssigneeGrundfos Management A/S
InventorsKjeld Appel, Eigil D. Andersen, Jan Harding Gliemann, Christian Rasmussen
Life of this patent
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Abstract
A submersible pump unit having a wet-running electric motor and only a single impeller can be driven by the electric motor with a rotation speed greater than 20,000 rpm. The rotor of the electric motor has a diameter of less than 25 mm.
Claims19
A submersible pump assembly having a wet-running electric motor (11), only a single impeller (8), wherein the impeller is drivable by the electric motor (11) at a rotational speed of greater than 20,000 rpm, wherein a permanent magnet rotor (12) of the electric motor has a diameter smaller than 25 mm and wherein at least one axial end side (40) of the impeller (8) on a side of the impeller facing away from the electric motor forms a thrust bearing surface comprising axial end sides (44) of impeller blades (42).
Dependencies are inferred from the claim text.