Processes and machines of Agroengineering systems EXPERT METHOD OF FACTOR ANALYSIS OF OPERATIONAL RELIABILITY OF COMBINE HARVESTERS Чеботарев Михаил Иванович д.т.н., профессор РИНЦ SPIN-код=9399-4280 Тарасенко Борис Федорович д.т.н., профессор РИНЦ SPIN-код=7415-7870 Шапиро Евгений Александрович к.т.н., доцент РИНЦ SPIN-код=5975-4917 ФГБОУ ВПО «Кубанский государственный аграрный университет», Краснодар, Россия

This article describes the engineering task of wear research, when a part is turned off after a known overhaul service life and its wear is determined. It is examined how the asymmetry coefficient is determined, the modal wear value corresponding to the largest ordinate of the normal wear distribution, etc. The figures presented in the paper illustrate the right-hand and left-hand asymmetry observed during accelerated wear, as well as the typical curve of the wear distribution of machine parts. Scientific-based judgments are presented on whether machine parts have been subjected to accelerated wear. This scientific article is prepared for agricultural specialists, researchers, teachers, postgraduates, undergraduates and students of agricultural universities in the field of training “Agroengineering”.

In the science of car repair, the problem of restoring worn-out crankshafts is very relevant. The engineering solutions proposed in the article will provide an increase in the technical and economic indicators of repair: an increase in the quality of coating by a gas-flame method with a finishing non-abrasive antifriction treatment. At the same time, the engineering solution consisting in the formation of one groove on each journal of the crankshaft, brazing of a copper wire, followed by flame spraying of a coating, sealed by a disk, and grinding of the journals (the bearing supports), provides a non-wear effect. So, thanks to the coil of copper wire, the resource of the crankshaft increases and the cost of repaired crankshafts are reduced in comparison with new ones.

This article substantiates the guaranteeing number of rice harvesters in the main technological link of the harvesting and transport complex, sets out the methodology and presents the calculated dependences of determining the rational number of rice harvesters, taking into account the accepted guarantee probability, which reduces the need for agricultural machinery and the cost of mechanized work. The article is recommended for agricultural specialists, scientists, teachers, graduate students, undergraduates and students of agricultural universities in the field of “Agricultural Engineering”.

The present paper describes the method of frequency optimization for oil service operations regarding technical maintenance of combine harvesters RSM “TORUM-740”. Theoretical background for the estimation of optimal period for oil service that would minimize total losses is considered. When improving oil service, the failures belonging to the following groups are taken into account: strength breaks and predictive failures. The present paper is recommended for experts in agriculture, scientists, academicians, masters and students of agricultural engineering department of agricultural universities.