Кравець, С. В. та Лук’янчук, О. П. та Хомич, А. В. та Kravets, S. V. та Lukianchuk, O. Р. та Khomych, A. V. (2020) ВПЛИВ КОНСТРУКТИВНИХ ПАРАМЕТРІВ ДВОЯРУСНОГО КРИТИЧНОГЛИБИННОГО РОЗПУШУВАЧА НА ЗУСИЛЛЯ ОПОРУ РІЗАННЯ ҐРУНТУ. Вісник Національного університету водного господарства та природокористування (1(89)). с. 177-189.

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Анотація

Викладено теоретичні дослідження зміни сил опору різання ґрунту двоярусного критичноглибинного розпушувача від зміни параметрів глибини розпушення та кута різання ґрунту. Запропоновані конструктивні параметри та структуру робочих органів для двоярусного критичноглибинного розпушувача для різної глибини розпушення ґрунту.

Title in English

INFLUENCE OF CONSTRUCTIVE PARAMETERS OF THE TWO-TIER CRITICAL DEPTH RIPPER ON THE RESISTANCE FORCES OF CUTTING THE SOIL

English abstract

Due to the increase in the capacity and weight of agricultural machinery, there is an excessive compaction of the soil, as agricultural land is subjected to repeated heavy machinery, with traces covering 40 to 80% of the area of agricultural land. Effective solution of these problems provides deep loosening of the soil, which allows to destroy the compacted base layer and the plow sole. When deep loosening it is necessary to use multilevel working bodies. Theoretical studies were based on the general principles of soil mechanics and theories of deep cutting of the soil medium. A specially developed algorithm in MS Excel environment was used to investigate the forces of cutting resistance. Theoretical researches of change of resistance forces of soil cutting of the two-tier critical-depth ripper from change of parameters of depth of loosening and angle of cutting of soil are stated. The design parameters and structure of the working bodies for the bunk critical boulder for different soil loosening depth are proposed. According to research, in order to achieve the maximum possible beneficial effect, namely reducing the forces of cutting resistance, in addition to choosing the optimal cutting angle, determine the appropriate number and location of work equipment. It is found that the optimal angle is different for different types of soil and is different for each component of the total cutting force. In the investigated angles ranges, the optimum cutting angle zone is minimized to minimize the total resistance force, but it is not visible for all components of the total force and is not explicitly expressed. The reduction in the total resistance force is only 5…8%. The studies have determined the optimal cutting angles of working elements to reduce the force of resistance to loosening: for semi-solid loam and for hard sand – αp = 20…22°, for semi-solid clay – αp=22…24°. It has also been found that with some parameters it is not possible to ensure complete loosening over the entire width of the grip. In further studies it is necessary to determine the optimal design of work equipment for different widths and to conduct research on the prevailing soil types.

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