UDC 631.313.5
DOI 10.36461/NP.2023.66.2.011
LABORATORY STUDIES OF THE CULTIVATOR RIPPER ROLLER FOR SECONDARY TILLAGE
K.Z. Kukhmazov, Doctor of Engineering Sciences; A.V. Yashin, Candidate of Engineering Sciences; R.R. Khabibullin, postgraduate student
Federal State-Funded Educational Institution of higher education «Penza State Agrarian University», Penza, Russia, tel. 89379127279, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
The paper is devoted to an urgent problem of improving the quality of secondary tillage. It is noted in the article that the quality performance of combined preparations for secondary tillage of loamy chernozems does not comply with the agrotechnical requirements fully. There is a description of the design of proposed cultivator ripper roller for secondary tillage and of an experimental installation for laboratory studies to substantiate its optimal structural and operational parameters. There is a methodology for conducting research according to the theory of planning a three-factor experiment. The optimization criterion is the degree of crumbling of the soil, which is characterized by the percentage of lumps less than 50 mm in size in the sample. There were selected the most significant factors (tooth length l, roller diameter d, operation speed𝜗 ), their levels and variation intervals. The matrix of the orthogonal compositional plan of the second order was compiled. Having processed the experimental data on a PC using Microsoft Excel and Statistika, an adequate second-order model that describes the dependence of the optimization criterion on the studied factors was obtained. Calculations were given and response surfaces of the degree of crumbling of the soil and their two-dimensional sections were constructed. The analysis of two-dimensional values shows that the optimal ones are: tooth length 𝑙 = 0.041 m, diameter of the loosening roller d = 0.293 m and operation speed 𝜗 = 1.95 m/s, while the degree of soil crumbling is more than 97.0%.
Keywords: combined aggregate, cultivator, secondary tillage, loosening roller, loosening roller share, soil channel, optimization criteria, degree of crumbling.
