Permanent magnet pump
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United States of America Patent
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Nov 10, 2020
Grant Date -
Feb 7, 2019
app pub date -
Apr 17, 2018
filing date -
Aug 1, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
A combined well pump and motor includes a housing having an axis, an upstream end and a downstream end. Diffusers are mounted for non-rotation in the housing, each of the diffusers having diffuser passages. An impeller is mounted between each of the diffusers for rotation relative to the impellers. Each of the impellers has impeller vanes defining impeller passages. The impeller has an exterior outer wall extending circumferentially around the impeller vanes, closing outer sides of each of the impeller passages. An array of magnets is mounted to each of the impellers. The magnets are spaced circumferentially apart from each other around the axis at a different radial distance from the axis than the impeller vanes. A stator is mounted in the housing. The stator has windings for interacting with the magnets to impart rotation to the impellers.
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