ОЦЕНКА ЭФФЕКТИВНОСТИ ПЕРСПЕКТИВНОЙ КОМБИНИРОВАННОЙ ТЕХНОЛОГИИ ДЛЯ ВОССТАНОВЛЕНИЯ ШЕЕК КОЛЕНЧАТЫХ ВАЛОВ ДВИГАТЕЛЕЙ ЛЕСОВОЗНЫХ АВТОПОЕЗДОВ

Abstract

The negative consequences of exploitation of logging road trains in difficult road and climatic conditions are considered. It has been established that the largest share of failures during the operation of a timber hauling train falls on its engine. Possible defects of the crankshaft, which contribute to the failure of the engine of a logging road train, are described. The expediency of the process of restoration of crankshafts of engines is substantiated. The analysis of the results of the study of foreign authors in the field of development and improvement of various methods for restoring the main and connecting rod journals of the crankshafts of engines is carried out. Among them, the most progressive method of restoration was revealed, which consists in the plasma deposition of coatings of specified properties on the main and connecting rod journals of the crankshafts. In order to increase the efficiency of the coatings obtained by plasma spraying, a combined method for the simultaneous deposition and hardening of the coating is proposed. A preliminary assessment was made on the basis of mathematical modeling of the main physical and mechanical properties of coatings obtained using this technology. The wear resistance of coatings obtained on the developed laboratory installation using compared technologies has been studied.