THE IMPROVEMENT OF RELIABILITY OF THE DIESEL BEARING ASSEMBLIES OF THE LARGE-LOAD AUTOMATIC DUMP-TRUCKS

The object of investigation: diesel for large-load automatic dump-trucks DM-21 (CN 21/21), with power of 800 kW (1300 hp). The purpose of the work: the improvement of reliability of the bearing assemblies of diesels, type CN 21/21 by searching the methods of elimination of fretting-corrosion damage in them. Developed have been the construction of the crank-shaft bearing, the methods of performance of the design investigations, the graphoanalytical methods of determination of the fretting formation lower boundary. The polymer, decreasing the fretting-wear by 8 times has been offered and tested, the efficiency of oil supply for the fretting decrease has been determined, the more perfect construction of the bearing assembly has been offered. The results of the experimental investigations have been used in restoration of the repair diesels CN 21/21. The application of the polymer coating, the service life of engine CN 21/21 has been increased by 2-3 thousand engine hours after the overhaulAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio