Motor rotor cooling with rotation heat pipes
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United States of America Patent
Stats
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Oct 28, 2008
Grant Date -
Mar 30, 2006
app pub date -
Sep 30, 2004
filing date -
Sep 30, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A heat pipe is partially-filled with a liquid, such as water, and is used to transfer heat from a rotating element, such as a rotor, via phase change and internal recycle of the liquid. Several heat pipes may be disposed radially around the rotating axis of the rotating element. The heat pipes may have a curved inner surface with a curvature not corresponding to the central axis of the heat pipe and positioned opposite the rotating axis so to experience greater centrifugal forces, to advance formation of a liquid film to improve heat transfer. For a rotor, the heat pipes, though individually placed as revolving heat pipes, in total exhibit behavior that approximates the favorable heat-transfer behavior of a single larger rotating heat pipe, but with heat-transfer surface area dispersed throughout the rotor, and without compromising structural integrity of the rotor shaft.
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Cited Art Landscape
Patent Citation Ranking
- 17 Citation Count
- H02K Class
- 57.68 % this patent is cited more than
- 17 Age
