Theoretical foundations for intensifying onion set harvesting

The paper shows that upgrading the design of onion harvesting machines through the integration of diverse separation intensifiers demonstrates limited efficacy in improving the quality of cleaning commercial produce. They noted the need to comply with strict technological parameters for setting up separating systems (feeding bulbs to a straight section of the pin web surface in the absence of losses, reducing the maximum speed of collision of the bulbs with the working elements of the cleaning unit to reduce damage, as well as improving the completeness of cleaning). The study reveals that one of the options for intensifying the process of onion set cleaning from soil and soil clods can be ultrasonic-assisted heap moistening during separation. (Research purpose) The research aims to determine theoretical principles driving the intensification of onion set cleaning from mechanical impurities. (Materials and methods) The research employed system analysis and synthesis methods, physical modeling based on probability theory and  mathematical statistics, numerical techniques for solving analytical dependencies, classical mechanics methods - fundamental principles of fracture theory, soil mechanics. (Results and discussion) The paper justifies the necessary optimum regime for intensifying onion set harvesting and cleansing them from mechanical impurities. It substantiates the functional diagram of a digging-type onion harvester featuring an ultrasonic cleaning module, taking into account the functions of the state, external and control actions, as well as performance indicators. (Conclusions) The research resulted in developing a design concept for an ultrasonic-equipped separating module of a harvester to improve the onion set cleaning process. This design conforms to the agrotechnical requirements, ensuring maximum soil and impurity sieving (at least 98 percent), minimizing losses (not exceeding 2 percent) and bulb damage (not exceeding 2 percent).

1. Lobachevskiy Ya.P., Emel'yanov P.A., Aksenov A.G., et al. Mashinnaya tekhnologiya proizvodstva luka [Machine technology for onion production]. Moscow: VIM. 2016. 168 (In Russian).

2. Kalinin A.B., Teplinskiy I.Z., Kudryavtsev P.P. Pochvennoe sostoyanie v intensivnoy tekhnologii [Soil condition in the intensive technology]. Kartofel' i ovoshchi. 2016. N2. 35-36 (In Russian).

3. Izmaylov A.Yu., Kolchin N.N., Lobachevskiy Ya.P., et al. Sovremennye tekhnologii i spetsial'naya tekhnika dlya kartofelevodstva [Modern technologies and special equipment for potato production]. Sel'skokhozyaystvennye mashiny i tekhnologii. 2015. N3. 43-47 (In Russian).

4. Protasov A.A. Funktsional'nyy podkhod k sozdaniyu lukouborochnoy mashiny [Functional approach to onion harvester designing]. Vestnik Moskovskogo gosudarstvennogo agroinzhenernogo universiteta imeni V.P. Goryachkina. 2011. N2(47). 37-43 (In Russian).

5. Dorokhov A.S., Sibirev A.V., Aksenov A.G., et al. Innovatsionnye tekhnologii i kompleks mashin dlya uborki luka-sevka [Innovative technologies and machinery ensemble for onion set harvesting]. Moscow: Tsifrovichok, 2021. 442 (In Russian).

6. Dorokhov A.S., Sibirev A.V., Aksenov A.G., Mosyakov M.A. Metod kompleksnoy otsenki kachestva vypolneniya tekhnologicheskikh operatsiy energoresursosberegayushchey tekhnologii uborki korneplodov i kartofelya [Comprehensive assessment of the technological performance quality of energy-and-resource-saving technology of root and potato harvesting]. Agroinzheneriya. 2022. Vol. 24. N1. 12-16 (In Russian).

7. Gefke I.V., Zharkova S.V. Osobennosti agrofizicheskikh svoystv pochvy pri vozdelyvanii luka repchatogo [The features of soil agrophysical properties under bulb onion]. Vestnik Altayskogo gosudarstvennogo agrarnogo universiteta. 2018. N8(166). 78-82 (In Russian).

8. Lu J.Q., Sun H., Dui H., et al. Design and experiment on conveyor separation device of potato digger under heavy soil condition. Transactions of the CSAM. 2017. N48(11). 146-155 (In English).

9. Lü J.Q., Shang Q.Q., Yang Y., et al. Design optimization and experiment on potato haulm cutter. Transactions of the CSAM. 2016. Vol. 47. N5. 106-114 (In English).

10. Laryushin N.P., Kukharev O.N., Kiryukhina T.A. Iskhodnye polozheniya pri proektirovanii mashin dlya uborki luka [Original position when designing onion harvesting machines]. Nauka v tsentral'noy Rossii. 2015. N6(18). 48-58 (In Russian).

11. Kalinin A.B., Smelik V.A., Teplinskiy I.Z., et al. Vybor i obosnovanie parametrov ekologicheskogo sostoyaniya agroekosistemy dlya monitoringa tekhnologicheskikh protsessov vozdelyvaniya sel'skokhozyaystvennykh kul'tur [Choice and justification parameters of ecological state in the agroecosystem for monitoring technology process growing agricultural crops]. Izvestiya Sankt-Peterburgskogo gosudarstvennogo agrarnogo universiteta. 2015. N39. 315-319 (In Russian).

12. Dorokhov A.S., Aksenov A.G., Sibirev A.V. Rezul'taty sravnitel'nykh laboratornykh issledovaniy ochistki korneplodov morkovi i klubney kartofelya ul'trazvukovym vozdeystviem [The results of comparative laboratory investigations on the ultrasonic cleaning of carrot roots and potato tubers]. Vestnik Ul'yanovskoy GSKHA. 2020. N2. 6-15 (In Russian).

13. Dandekar I., Joshi A., Patil V. A review paper based on design and development of an onion harvesting machine. Journal of Information and Computational Science. 2020. N9. 333-337 (In English).

14. Byshov N.V., Yakutin N.N., Koveshnikov R.Yu., et al. Modernizatsiya kopatelya KST-1,4 [Modernization of digging machine KST-1.4]. Vestnik Ryazanskogo GAU im. P.A.Kostycheva. 2016. N2(30). 75-78 (In Russian).

15. Korshunov A.V., Simakov E.A., Lysenko YU.N., et al. Aktual'nye problemy i prioritetnye napravleniya razvitiya kartofelevodstva [Actual problems and priority directions of innovative development of potato breeding]. Dostizheniya nauki i tekhniki APK. 2018. Vol. 32. N3. 12-20 (In Russian).