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US 4,358,695 AGranted
Eddy current coupling having bearing flux shunt
AssigneeLitton Industrial Products, Inc.
InventorsDaniel J. MacDonald, Thomas H. Jones
Life of this patent
Estimating the term…
Abstract
An eddy current coupling has telescoping input (12) and output (18) shafts to form a shunt (72, 74, 76) for the magnetic flux (78a) of the coupling around a bearing (66) between the shafts. This avoids the increased friction and heating effects and the magnetization of the bearing occurring when the bearing is exposed to the flux.
Claims6
An eddy current coupling comprising:
- coaxial rotatable input and output shaft means positioned in tandem along the axis of said shafts;
- a generally tubular inductor member operatively associated with one of said input and output shaft means for rotation therewith;
- a magnetic rotor member operatively associated with the other of said input and output shafts for rotation therewith and for being electromagnetically coupled to said inductor member;
- a field coil mounted in said coupling for generating a magnetic flux causing electromagnetic coupling and torque transmission between said inductor and rotor members and said input and output shaft means;
- and
- bearing means interposed between said input and output shaft means,
- one of said input and output shaft means having an axially extending recess for receiving the end of the other of said shaft means for forming a low reluctance flux path between said shaft means in parallel with said bearing means.
4 more elements
Dependencies are inferred from the claim text.