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Rotary pump

  • US 9,835,158 B2
  • Filed: 09/01/2010
  • Issued: 12/05/2017
  • Est. Priority Date: 09/01/2010
  • Status: Active Grant
First Claim
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1. A rotary pump, including a magnetic rotor arranged in a pump housing and having a magnetic rotor plane, wherein the magnetic rotor plane coincides with a center plane of the magnetic rotor, wherein the rotor is operatively connected to a drive for conveying a fluid, wherein an inlet opening is provided at the pump housing for the inlet of the fluid into the pump housing and a radial outlet passage is provided for conveying the fluid out of the pump housing and wherein the drive is a bearingless motor having a stator configured as a bearing stator and drive stator and having a magnetic stator plane, which stator bears a drive coil and a bearing coil lying in the stator plane and/or a drive bearing coil, wherein the rotor is magnetically contactlessly journaled within the stator and an axial height of the rotor is smaller than or equal to half a diameter of the rotor so that the rotor is passively magnetically stabilized by reluctance forces with respect to the magnetic stator plane both against an axial displacement and against a tilting from an equilibrium position, characterized in that the outlet passage is radially outwardly conducted away from the pump housing in the region of the stator such that a center axis of the radial outlet passage coincides with the magnetic rotor plane or with the magnetic stator plane, wherein the stator has a gap in the peripheral direction in which the radial outlet passage is arranged, the rotary pump further comprising a ring-shaped bridge element made from light plastic to connect opposite ends of the stator forming the gap.

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