METHOD OF EVALUATING ANTIWEAR AND ANTIFRICTION PROPERTIES OF LUBRICANTS Russian patent published in 2025 - IPC G01N3/56 G01N33/30 

FIELD: measuring.

SUBSTANCE: invention relates to investigation of physical and chemical and operational properties of lubricants for transmission units. Filling the reservoir with the metal plate installed with the help of the retainer with the tested lubricating material, installing the metal ball, heating the reservoir with the lubricating material and the plate to the specified temperature, further temperature control for 120 minutes until the lubricant temperature sensors drift stops, bringing the surface of the ball and the plate into contact, impact of pressure on contacting friction surfaces, creation of a certain oscillation frequency of the plate and subsequent evaluation of the information index of anti-wear and antifriction properties of the tested lubricating materials based on the result of mismatch with the identical information index of the reference lubricating material. Factors of conditions of the process of intensification of antiwear and antifriction properties of the tested lubricant are set: temperature of the tested lubricant in range of 70-100 °C, oscillation frequency of plate is 32-64 Hz, pressure in the Hertz contact is 62-366 MPa. 15 tests are carried out as minimum required number of stages within one cycle of lubricant tests. After completion of each stage of the test cycle, the friction coefficient is fixed and the volume of the wear path of the plate W_w is calculated. At the end of the test cycle, generalized indicators are determined both by the volume of the wear path of the plate W_w, and by the friction coefficient ƒ for the tested lubricant, which are compared with the generalized index for the reference lubricant.

EFFECT: improving information value of evaluation of antiwear and antifriction properties of lubricating materials, approximation of test conditions to real operating conditions of equipment and improving reliability of obtained results.

1 cl, 4 tbl