Does anyone have any successful examples of passing an electrical signal from a rotating shaft to an outer housing?
In my application the compnents are in abrasive fluid flowing up to
Dear Jim:
A lot of patents on this, but perhaps not through slurry.
Wireless transmission comes to mind. Presumably the slurry would make short work of ultrasonics, otherwise it would seem that one could broadcast the signal through the slurry.
David A. Smith
go to
Find a common axis of rotation. Use a moving to fixed loop transformer. You need to modulate the signal appropriately. This never leaks. Ever.
Brian W
Good suggestion Brian. Jim, a video head from an old VCR is a good example to look at - without the slurry, temp, pressure etc. rob
look at how a generator or any electrical motor works. There is a rotor and a stator, the rotor is charged (or charging), and so needs to pass current to the body of the motor, which does not roll obviously! You will notice small "broom" on the rotor shaft. You can also look at an alternator from any car engine.
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