Results of Theoretical Studies to Substantiate the Parameters of Multi-blade Rotary-type Working Bodies
The article presents the results of theoretical studies of the technological process of operation of multi-blade working bodies of rotary type, intended for the distribution of solid organic fertilizers. To determine the length of the blades of the last row of rotors, and accordingly the overall dimensions of the spreader, theoretical dependences of the range of fertilizer particles on the radius of the blades are obtained, which made it possible to determine the size of the blades that provide the required performance of the rotary spreader. Considering the uniform distribution of fertilizer particles over the sieving width, the dependences of the “limiting” zone of loading of the blades (the maximum thickness of the layer of fertilizers captured by one blade) on the angle of their inclination at different lengths of the blades were obtained, which showed that when applying fertilizers with medium and large doses, several rows of blades. Computational experiments were carried out, during which, the number of rows of blades and the ratio of the lengths of the blades of different rows were determined to obtain the smallest unevenness depending on different doses of fertilizer application. As a result of mathematical modeling, the dependences of the working insertion width on the angle of inclination of the blades of the rotor rows relative to the radial position are obtained for various second-time supply of material, using which rational values of the angle of inclination of the blades are found.
 Matin, M.F., Fielke, J.M., Desbiolles, J.M.A. (2014). Furrow parameters in rotary strip-tillage: Effect of blade geometry and rotary speed. Biosystems Engineering, vol. 118, pp. 7–15.
 Zhang, G., Zhang, Z., Xiao, M. et al. (2019). Soil-cutting simulation and parameter optimization of rotary blade’s three-axisresistances by response surface method. Computers and Electronics in Agriculture, vol. 164, article 104902.
 Przywara, A. (2015). The Impact of Structural and Operational Parameters of the Centrifugal Disc spreader on the Spatial Distribution of Fertilizer. Agriculture and Agricultural Science Procedia, vol. 7, pp. 215–222.
 Koko, J., Virin, T. (2009). Optimization of a fertilizer spreading process. Mathematics and Computers in Simulation, vol. 79, pp. 3099–3109.
 Aphale, A., Bolander, N., Park, J., et al. (2003). Granular Fertiliser Particle Dynamics on and off a Spinner Spreader. Biosystems Engineering, vol. 85, iss. 3, pp. 319–329.
 Hofstee, J. W. (1995). Handling and Spreading of Fertilizers: Part 5, The Spinning Disc Type Fertilizer Spreader. Journal of Agricultural Engineering Research, vol. 62, iss. 3, pp. 143–162.
 Villette, S., Cointault, F., Piron, E. et al. (2005). Centrifugal Spreading: An Analytical Model for the Motion of Fertiliser Particles on a Spinning Disc. Biosystems Engineering, vol. 92, iss. 2, pp. 157–164.
 Van Liedekerke, P., Tijskens, E., Ramon, H. (2009). Discrete element simulations of the influence of fertiliser physical properties on the spread pattern from spinning disc spreaders. Biosystems Engineering, vol. 102, iss. 4, pp. 392–405.
 Aan, A., Heinloo, M. (2014). Motion of a granule on fertilizer spreading disc. International Symposiumon Agricultural Engineering. Opatija, CROATIA, vol. 42, pp.101–112.
 Abbou-ou-cherif, E.-M., Piron, E., Chateauneuf, A. et al. (2017). On-the-field simulation of fertilizer spreading: Part 1 Modeling. Computers and Electronics in Agriculture, vol. 142, part A, pp. 235–247.
 Yang, L., Chen, L., Zhang, J. et al. (2018). Fertilizer sowing simulation of a variable-rate fertilizer applicator based on EDEM.IFAC-Papers On Line, vol. 51, iss. 17, pp. 418–423.
 Yinyan, S., Man, C., Xiaochan, W. et al. (2018). Numerical simulation of spreading performance and distribution pattern of centrifugal variable-rate fertilizer applicator based on DEM software. Computers and Electronics in Agriculture, vol. 144, pp. 249–259.
 Yinyan, S., Zhichao, H., Xiaochan, W. et al. (2018). Motion analysis and system response of fertilizer feed apparatus for paddy Variable-Rate fertilizer spreader.Computers and Electronics in Agriculture, vol. 153, pp. 239–247.
 Van Liedekerke, P., Tijskens, E., Dintwa, E. et al. (2009). DEM simulations of the particle flow on a centrifugal fertilizer spreader. Powder Technology, vol. 190, iss. 3, pp. 348–360.
 Dieudé-Fauvel, E., Héritier, P., Roux, J.C. (2016).Impact of sludge mechanical behaviour on spatial distribution parameters obtained with centrifugal spreader: Preliminary study. Engineering in Agriculture, Environment and Food, vol. 9, iss. 3, pp. 242–249.
 Brovchenko, A.D., D’achkov, A.P., Kolesnikov, N.P. et al. (2018). Mathematical simulation of rotor tool technological process. IOP Conference Series: Earth and Environmental Science: International Conference on Innovations and Prospects of Development of Mining Machinery and Electrical Engineering (Mechanical engineering), vol. 194, part 2.
 Brovchenko, A.D., Dyachkov, A.P., Kolesnikov, N.P. et al. (2018). Theoretical and Experimental Studies of Energy Consumption in Rotor Fertilizer Spreaders Operation. Engineering & Energy: Advances in Engineering Research (AER). International scientific and practical conference “AgroSMART – Smart solutions for agriculture” (AgroSMART 2018), vol. 151.