METHOD FOR DETERMINATION OF TEMPERATURE RESISTANCE OF LUBRICANT OILS Russian patent published in 2009 - IPC G01N33/30 

FIELD: physics, measurements.

SUBSTANCE: invention is related to technology for determination of temperature resistance of lubricant oils. In method for determination of lubricant oil temperature resistance, oil sample is taken, divided into equal portions, each of them is heated at atmospheric pressure without air access with condensation of vapors and condensate drain, besides for each subsequent part of oil sample, test temperature is increased by a permanent value, afterwards light flux absorption ratio K_a is determined, graphical dependences on temperature are built, and temperature resistance is detected, moreover, after testing sample is weighed, value of evaporated mass G is identified as difference of oil sample mass before and after test, evaporation ratio K_G as ratio of evaporated oil sample to remained mass, coefficient of conversion energy E_c as sum of light flux absorption coefficients K_a and evaporation K_G, then graphical dependences of energy conversion ratio E_c on test temperature are built, and temperature resistance of tested lubricant oil is determined by temperatures of destruction process beginning and completion.

EFFECT: improved accuracy of determination.

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