Mathematical modelling of traction resistance of the improved opener of grain seeder

Abstract

The object of the study is a double disc coulter with a pressure plate. The aim of the research was to simulate the operation of the double disc coulter using a grain seed drill as an example. Analytical dependencies for determining the traction resistance of the improved coulter are presented. The method of calculating the drag resistance of a double disc coulter with an original pressure plate installed on it is given. The components of the traction resistance balance have been determined and the dependence on the sowing depth has been established. 3D graphical dependences of the traction resistance of serial and advanced coulters on the speed and depth of its movement have been constructed based on the results of calculations. The main influence is the placement depth. Speed of movement of the seeder in the considered interval of its values does not render essential influence on traction resistance. Installation of an additional pressure plate increases traction resistance to 5 %.

Theoretical Substantiation of the Dependence of Spring Deformation of an Improved Opener

“…The width of the furrow b, m, formed by a double-disc coulter with a disc angle γ, in its lower part-point A (see Figure 2) is equal to [11,[23][24][25][26][27]:…”

“…where ψд-angle between the planes of the disks, degrees; for the SZ-3.6 seeder ψd = 10 [4, [23][24][25][26][27][28][29][30][31]; γп-angle, degrees, determined from the expression:…”

“…The forces of soil friction on the deformer ( тд F ), soil friction on the shank ( тх F ), and normal soil reactions on the deformer ( Nд F ) and on the shank ( Nх F ) are constant, independent of the seeding depth and the speed of movement of the sowing unit, and are determined by calculating the traction resistance of the serial and improved openers (Rс), which consists of the following forces resistance: cu ing of the disk (Rр), crushing by the chamfer (Rф), soil deformation by the side surface of the disk (Fдб), friction of the chamfer on the soil (Fтф), friction of the side surface of the disk on the soil (Fтб), normal reaction of the soil to the deformer of the pressure plate (FNд), friction of the deformer of the pressure plate on the soil (Fтд), normal reaction of the soil to the shank (resistance force to indentation of seeds and soil mass by the shank of the pressure plate) (FNх), and friction force of the shank of the pressure plate on the soil (Fтх) (Figure 7) [6,[23][24][25][26][27][28][29][30][31]. The traction resistance of the improved opener is determined by the dependence:…”

Double Disc Colter for a Zero-Till Seeder Simultaneously Applying Granular Fertilizers and Wheat Seeds

“…During the operation, first of all, the double-disc colter cut the soil. Left and right discs cut the soil layer to a certain depth and spread the soil in a transverse direction, forming a groove that causes rolling resistance [39,40]. Therefore, the disc's horizontal force (F h ) opposes the direction of travel, and the disc's vertical force (F v ) directs upward.…”

Experimental Field Tests of the Suitability of a New Seeder for the Soils of Northern Kazakhstan

“…Although significant research has been conducted on the development of cultivation machines [25][26][27], unfortunately, there is a large gap in terms of the research into the development of versatile seed drills with automatically variable designs and the adjustment of their technological parameters. These can be used in different climatic zones with different soil characteristics [28][29][30]. An analysis of the scientific literature shows an urgent need for the development of new devices designed for seed sowing [31][32][33].…”