Sustainability in the agricultural field suggests the conservation and maintenance of a natural environment of soil. Nevertheless, in the potato production chain, the mechanized harvest is carried out with the concurring removal of impurities and fertile soil. The authors have developed a new spiral potato cleaner which is able to capture and efficiently remove soil lumps of various sizes and shapes, as well as various plant residues. Theoretical and experimental studies have been performed on this soil clod cleaner to determine the structural and kinematic parameters that provide efficient capturing, motion and sifting down of the soil, through the gaps between the helices of its cleaning spirals. An analytical description of the motion of the clod of soil has been made and a system of differential equations has been compiled, whose numerical solution made it possible to determine the indicated reasonable operative parameters of the developed spiral potato cleaner. The results of the experimental research confirmed those ones obtained through the numerical solution of the mathematical model, i.e., rational angular speed ω of the rotation of the spirals from 20.0 to 30.0 rad s−1 and the radius R of spirals between 0.12 and 0.15 m.
The study guide related to the basics of conducting scientific research in the field of agro- engineering, which are carried out in higher education. Along with the presentation of basic concepts, theoretical provisions and methods of conducting experimental research, the manual contains tasks and methodical instructions for laboratory and practical work on the subject of scientific research and patent science, which are taught at the engineering faculties of agricul- tural universities. The basics of the research methodology of work processes and parameters of agricultural machines and mechanized processes are given. Intended for students, masters, postgraduates, researchers, specialists in agricultural engi- neering and industrial mechanical engineering.
The study guide covers all the topics of the curriculum in theoretical mechanics in the section of statics for the faculties of mechanical engineering, namely, it contains problems on the following topics: linkages, a system of convergent forces on a plane and in space, an arbitrary plane system of forces, equilibrium of a composite structure, calculation of forces in a truss rod, an arbitrary spatial system of forces, the equilibrium of a body taking into account frictional forces and the center of gravity. Each topic of the main material of the course contains the necessary theoretical information, the necessary recommendations for solving problems and the problems themselves and their detailed solution. The study guide is intended for students and postgraduates in the specialty 133 – Industrial mechanical engineering.
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