Method and apparatus for on-sine monitoring of wear in machinery

Details Method and apparatus for on-sine monitoring of wear in machinery Method and apparatus for on-sine monitoring of wear in machinery

1986-09-18

1989-06-20

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Fluid material examination

324227, 7386105, G01N 2774, G01R 3312, G01F 1708, G01P 518

Patent

active

048412449

ABSTRACT:
A detector for producing an electrical signal proportional to the concentration of ferromagnetic particulate material in a fluid stream includes a sensing coil arranged to form the inductance coil of a radio frequency oscillator arranged to produce an electrical signal at a base frequency, a magnetic trap for producing a magnetic field and a support for supporting the sensing coil and the magnetic trap in juxtaposition to one another such that, when the coil is disposed within or proximate the fluid stream and electrically connected to the oscillator, energization of the magnetic trap causes ferromagnetic particulate material proximate the coil to be attracted toward the coil resulting in a deviation of the frequency of the signal from the base frequency proportional to the concentration of ferromagnetic particulate material in the fluid stream. The detector has particular utility in monitoring wear in machines employing a lubricating fluid for lubricating ferromagnetic components which produce ferromagnetic particulate wear debris during operation.

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M. C. Arneson, K. W. Chambers, I. M. Smith and J. E. Swiddle, "Probe for Determining the Concentration of Ferromagnetic Particles in Water at High Temperature and Pressure", Power Industry Research, (1981):87-90.

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