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dc.contributor.authorIhnatiev, Yevhen
dc.contributor.authorBulgakov, Volodymyr
dc.contributor.authorBonchik, Vitaliy
dc.contributor.authorRuzhylo, Zinoviy
dc.contributor.authorZaryshnyak, Anatoliy
dc.contributor.authorVolskiy, Volodymyr
dc.contributor.authorMelnik, Viktor
dc.contributor.authorOlt, Jüri
dc.identifier.publicationAgraarteadus : Journal of Agricultural Science, 2021, vol. 32, no. 1, pp. 41–48est
dc.descriptionSaabunud / Received 04.05.2021 ; Aktsepteeritud / Accepted 07.06.2021 ; Avaldatud veebis / Published online 07.06.2021 ; Vastutav autor / Corresponding author: Jüri Olt jyri.olt@emu.eeest
dc.description.abstractThe experimental research was carried out on a specially designed laboratory-and-field test unit with the use of a hydraulic vertical rotor drive and strain-gauge equipment mounted on a tractor as well as the set of interchangeable coupling pieces for setting the machine's operating duty. Research into the process of breaking two adjacent potato row beds with the vanes of a vertical rotor has been undertaken. A design and process schematic model has been proposed for the operation of the potato harvester. Experimental research into the geometrical parameters of the potato row has been carried out to select the design parameters of potato harvesters. Based on the results obtained during the experimental investigations, the rational ranges have been established for the work process of the rotary potato harvester, the methods of engineering clod breaking tools have been developed. Following the completion of the full factorial experiment, regression functions have been generated. Their analysis has proved that the following factors have the greatest impact on the optimisation parameters: the rotor diameter and the clearance between the rotor and the spherical discs. The following parameters have been optimised based on the response surface analysis: soil separation ratio S = 93.5%, tuber damage rate Pb = 0.97%, total power consumption by unit operation Nа = 18.27 kW, at the following pre-set values of the factors: nр = 77 min–1, Vm = 2.2 m∙s–1, dр = 0.825 m, l2 = 0.3 m. The maximum discrepancy between the results of the theoretical and experimental investigations for determining the design and process parameters of the potato harvester does not exceed 15%. The completed economic testing has proved the advantages of the experimental potato harvester as compared to the existing ones. That said, the separation ratio of the pilot machine is equal to S = 91.4%, which is 23% higher than in the reference case, while its tuber damage rate is equal to 1.14%, which is 5.0% better than in the reference case. The recommendations for the selection of the rational operation duty of the rotary potato harvester as well as the methods for the engineering analysis of the design and process parameters of clod breaking tools have been developed.eng
dc.publisherEstonian Academic Agricultural Societyeng
dc.rightsCreative Commons Attribution 4.0 International (CC BY 4.0) ; openAccesseng
dc.subjectpotato harvestereng
dc.subjectsoil separationeng
dc.titleExperimental research into operation of potato harvester with rotary tooleng
dc.rights.holderAuthors of accepted articles retain all rights to use, reuse, and distribute the published research as long as the author credits the original publication in this journal. The authors submitting to the journal are expected to follow the general ethical guidelines regarding plagiarism. If in doubt consult the ICMJ guidelines on overlapping publications. Once accepted the journal retain the right to print and distribute the manuscript submitted by the author.eng
dc.contributor.departmentEstonian University of Life Sciences. Institute of Technologyeng

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Creative Commons Attribution 4.0 International (CC BY 4.0) ; openAccess
Except where otherwise noted, this item's license is described as Creative Commons Attribution 4.0 International (CC BY 4.0) ; openAccess