EXPERIMENTAL ESTIMATION OF THE INFLUENCE OF REGULAR MICROGEOMETRY ON TRIBOLOGICAL CHARACTERISTICS OF A RADIAL SLIDING BEARING
One of the current trends in increasing the bearing capacity of plain bearings is the use of texturing of friction surfaces. To determine the influence of the parameters of the regular microgeometry of the friction surfaces on the hydromechanical characteristics of the "shaft-bearing" tribo interface, experimental studies were carried out on an II 5018 friction machine II 5018. A model friction unit was developed that allows reproducing test conditions comparable to the real operating mode of sliding bearing of internal combustion engine. To assess the effect of texturing on the operation of plain bearings, three types of regular microgeometry were investigated. The study was based on the analysis of the Gersi-Striebeck diagrams for journal bearing, corresponding in its geometric characteristics to the connecting rod bearing of the crankshaft of the VAZ 21083 engine. The results indicate that the texturing of the liners affects the operation of journal bearings. Of the three texturing samples under study, the option has been chosen that has the highest bearing capacity, and therefore makes it possible to achieve a change in the friction mode from liquid to boundary at higher loads than in other considered texturing samples. The work was carried out in the laboratory "Tribotechnics" named after V.N. Prokopyev, Department of Automobile Transport, South Ural State University (Chelyabinsk).