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

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

1984-03-26

1987-03-17

Karlsen, Ernest F.

Electricity: measuring and testing

Magnetic

Fluid material examination

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

Patent

active

046510915

ABSTRACT:
The specification describes a method and an apparatus for detecting and quantitatively assessing wear of a machine having ferromagnetic components subjected to wear during operation resulting in the production of ferromagnetic particulate wear debris, and a lubrication system utilizing a lubricating fluid, in which the wear debris becomes entrained, for lubricating the components. The method comprises the steps of passing a sample stream of the lubricating fluid at a predetermined rate of flow axially through the core of an inductance coil of a sample oscillator for producing a time varying signal which deviates from a predetermined value in proportion to the mass of ferromagnetic material contained in the fluid passing through the core, monitoring the rate of change of signal and activating an indicator when the rate of change of the signal exceeds a predetermined level.

REFERENCES:
patent: 3748576 (1973-07-01), Sigournay
"Probe for Determining the Concentration of Ferromagnetic Particulates in Water at High Temperature and Pressure" by M. C. Arneson, K. W. Chambers, I. M. Smith & J. E. Swiddle (1981) Power Industry Research, 1, 87-90.

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