Method and apparatus for real-time, on-line monitoring of wear i

Details Method and apparatus for real-time, on-line monitoring of wear i Method and apparatus for real-time, on-line monitoring of wear i

1987-02-20

1988-08-23

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Magnetic

Fluid material examination

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

Patent

active

047663731

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
Waggoner, "Problems in Bearings and Lubrication", AGARD paper from Conference Proceedings #323, 1982, pp. 2-1-2-21.
Jones, "Condition Monitoring '84", Proceedings by an International Conference on Condition Monitoring held at University College of Swansea, 4/1984, pp. 637-669.
Arneson et al., "Probe for Determining the Concentration of Ferromagnetic Particles in Water at High Temperatures", 1981, Power Industry Research, pp. 87-90.

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