Cooling arrangement for magnetic couplings in pumps
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United States of America Patent
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Jun 21, 1994
Grant Date -
N/A
app pub date -
Feb 2, 1993
filing date -
Feb 3, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A gear pump which is fitted with a magnetic coupling (6) to ensure against leaks uses circulation of the pump fluid to cool the magnetic coupling. The circulation is established by supplying the pump rotor (4) with radial channels (24) which terminate in recesses on the periphery of the rotor and which are connected to an axial channel (26) in the rotor shaft leading to the end of the shaft which is nearest the magnetic coupling. The fluid which is drawn through the channels (24) is mixed with the main stream of fluid in a section which is cut out of the wall of the pump chamber (16), and fresh cooling fluid is drawn via the chamber (40) to the radial gap in the magnetic coupling.
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