METHOD FOR EFFECTIVE MONITORING OF LUBRICATING OIL OPERABILITY, AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2013 - IPC G01N33/26 

FIELD: machine building.

SUBSTANCE: optic emission beam exciting oil fluorescence is directed at the controlled oil; fluorescence intensity of fresh oil is measured simultaneously at three spectrum ranges and two operating spectrum ranges are determined, in which values of intensities are higher than in the third one; fluorescence intensity is measured during oil operation; oil ageing index is determined as ratio of intensities in working spectrum ranges, and oil operability is evaluated as per the ageing index. Optic emission exciting oil fluorescence is polarised, and in addition, fluorescence intensities are measured simultaneously with parallel and perpendicular emission polarisation relative to polarisation of optic emission exciting oil fluorescence, as per which anisotropy index of oil fluorescence is determined, as well as oil temperature is measured and oil dynamic viscosity is determined additionally as per the specified calibration dependence and oil operability is evaluated as per the ageing index, by comparing the index value to a threshold value, and as per the change of oil viscosity at its operating temperature relative to the threshold value. Besides, a device adapted for implementation of the above method is described.

EFFECT: improving reliability of effective monitoring of oil operability owing to increasing informativity by using for effective evaluation of oil state of two diagnostics indices - oil ageing degree characterising the change of oil chemical properties and oil viscosity characterising the ability of providing effective thickness of lubrication layer between surfaces of friction assemblies.

2 cl, 1 dwg, 3 tbl