Abstract

The article presents the results of studies aimed at determining the criterion for the further use of agricultural machinery that has reached the limit state: to carry out major repairs or dispose of it, as much as possible to save material resources, as required by the principles of the circular economy. Analysis and review of the works of domestic and foreign scientists, as well as the results of studies to identify the reasons for the lack of an effective mechanism for determining the limit state of a particular agricultural machine and the criterion for the onset of this condition. To solve the tasks, the technical condition and cost of the components included in the equipment supplied to the repair enterprises of the industry in 12 regions of Russia were studied. Was determined based on changes in the structure of parts with different periods of use of agricultural machinery. The results showed that the price of repair of the machine depends on the level of loss of validity of its parts, which were divided into three groups: fit without repair, fit after recovery and scrap, which cannot be restored. Was built based on the prices of capital repair machines and revenue from the sale of components utilized machine when the loss of her life, which allowed to determine the boundaries for further use of the machine, which reached a limit state. It was found that the loss of shelf life of almost all machines now entering the repair facility, is beyond the limits of the state and must be disposed of. The limit state of the machine occurs when the loss of its validity in the range of 0.45 < Г[sub]п∑i[/sub] < 0.5. In this interval, the owner of the machine can choose either of two options for its further use: repair or recycle. When Г[sub]п∑i[/sub] <0,45 preferable overhaul. When Г[sub]п∑i[/sub] > of 0.5 will require disposal, which will provides the greatest possible resource efficiency. An analysis of the research, taking into account past and foreign experience, will justify the direction of the agricultural sector in maintaining high technical readiness of agricultural machinery.

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