Analysis of the state of production and manufacturing quality of bronze-babbit bearings of the crankshaft of diesel locomotives

The article gives the study on the areas of application of bronze-babbit bearings for diesel locomotives are considered. Information is provided on the types of diesel engines and locomotives for which they are installed, where such bearings are used. The main types of damage are described: fatigue and corrosion-cavitation wear and the factors affecting them. Authors presented results of research on technological factors that affect fatigue damage, such as the technology of tinning the bronze body with solders, the quality of pig babbit. The chemistry of calcium babbit and BK2 babbit in an antifriction layer is reviewed. The violations that occur during the manufacture of bearings by various manufacturers are described. The results of analysis of the influence of the chemical composition of babbit on its structure are presented. The influence of calcium and magnesium is described, in particular, on the formation of swelling on the babbit surface. The paper provides results of studies on the adaptability of the babbit layer to changes in friction conditions with the formation of various types of secondary structures. Micro-X-ray spectral studies of babbit layers of various liners and secondary structures on friction surfaces have been carried out. As the conclusion of the article the studies carried out and suggestions were made aimed at checking the quality of bronze-babbit bearings manufactured by various manufacturers.