Kyrychenko A. Substantiation of parameters of milling working member of cultivator for mulching of soil with coarse stalk plant residues

The thesis deals with the development of a milling working member for shredding coarse stalk plant residues with simultaneous soil loosening, and substantiation of its parameters and operating modes. Offered is an ecologically friendly and energy-saving tilling technology with using the new all-purpose milling working member. Substantiated is the external configuration and parameters of this knife, which allows shredding coarse stalk plant residues and soil loosening simultaneously that is realized by reducing the cutting angle of soil and plant residues for account of this the resisting force diminishes and correspondingly expenditure of energy under sufficiently qualitative indices of tillage. Equations are obtained on parameters of the milling working member on conditions that plant residues cutting is provided by the method of pressing stalks to soil surface for account of declination of the cutting edge of the milling working member to the opposite side from the driving direction. Obtained is also the equation describing dependence of the cutting angle of various materials on the edge angle of the knife and the angle of its declination to the opposite side from the driving direction. Laboratory and field investigations were carried out aimed at the determination of qualitative, technological and energy indices on the process of the experimental working member. Results of experimental investigations corroborate the results of theoretical investigations, and also obtained experimental data confirm economical and ecological efficiency of the milling working member.