Technology of shipbuilding, ship repair and organization of shipbuilding production

The article was submitted November 9, 2023; approved after reviewing November 22, 2023; accepted for publication March 15, 2024.

Original article

https://doi.org/10.24866/2227-6858/2024-1/56-66

Leont’ev А.I., Leont’ev L.B., Shapkin N.P.

Andrey L. Leont’ev, Candidate of Engineering Sciences, Minister of Energy and Gas Supply, Government of the Primorsky Territory (Vladivostok, Russia), gfi25leontev@mail.ru 

Lev В. Leont’ev, Doctor of Engineering Sciences, Professor, Polytechnic Institute, Far Eastern Federal University (Vladivostok, Russia), leontyev.l.b@yandex.ru, https://orcid.org/0000-0002-8072-306X 

Nikolay Р. Shapkin, Doctor of Chemical Sciences, Professor, Institute of High Technology and Advanced Materials, Far Eastern Federal University (Vladivostok, Russia), npshapkin@gmail.com, http://orcid.org/0000-0002-4287-8917

The influence of the hardness of the shaft journals and the chemical composition of tribotechnical organic-inorganic materials for forming coatings on steel on the performance properties of crankshaft bearings marine medium speed diesel engines

Abstract. The paper summarizes the results of studies of the operational properties of the tribo-tension "crank-shaft – bearing liner" of a marine medium-speed diesel engine. The main cause of crankshaft failures is the wear of the necks. To increase the durability of crankshaft bearings, it is proposed to form wear-resistant thin-film metal-ceramic coatings on the shaft necks, which are obtained by tribomechanical modification of the surface with organo-inorganic ma-terials based on vermiculite.

It has been established that the following factors affect the wear rate of the parts of the tribo-tension "crankshaft – bearing liner" of a marine medium-speed diesel engine: mechanical properties: the modulus of elasticity of the surface layer has the greatest influence. To increase the wear resistance of the parts of the tribo-tension "crank-shaft – bearing liner" and, accordingly, its durability, it is necessary to form thin-film metal-ceramic coatings on the surface of the necks, providing optimal parameters of mechanical properties and surface structure.

Keywords: diesel, bearing, coating, wear, tribotechnical material, mechanical properties, surface topography

See the reference in English at the end of the article

For citation: Leont’ev А.I., Leont’ev L.B., Shapkin N.P. The influence of the hardness of the shaft journals and the chemical composition of tribotechnical organic-inorganic materials for forming coatings on steel on the performance properties of crankshaft bearings marine medium speed diesel engines. FEFU: School of En-gineering Bulletin. 2024, no. 1(58), pp. 56–66. (In Russ.).