Apparatus and method for monitoring and controlling a disc refiner gap
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United States of America Patent
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-
Jun 19, 1984
Grant Date -
N/A
app pub date -
Feb 22, 1982
filing date -
Feb 22, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method for dynamically monitoring the gap between the refining surfaces of first and second relatively rotating metallic refining members. At least one of the refining members is mounted to a first rotatable shaft which is supported in a housing by lubricated bearing means. When the refining members are in rotating relation, an electrical impedance exists across the gap. The value of the impedance is dependent on the size of the gap. An alternating electrical current is passed through the gap and the voltage across the gap is monitored to provide an indication of the size of the gap. The voltage across the gap can also be used as one input to a circuit which controls the size of the gap by driving an electro/hydraulic system.
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