631.42

bar conveyor, unevenly distributed load, stress-strain state, dangerous area.

In the paper, an analytical study of the stress-strain state of the structural system of the rod conveyor of root harvesting machine with the maximum load arbitrarily distributed on the conveyor belt is performed. Rod conveyors are one of the main nodes for transporting and separating root crops through the technological channel of root harvesting machines, for loading them into a hopper and onto a vehicle. Structurally, they form an endless grid that surrounds the leading and driven sprockets or pulleys and supporting rollers. The entire structure of the conveyor is attached to the frame, which rests on the main frame of the harvesting unit. The shape and parameters of the rod conveyor are chosen depending on the layout of the unit and the required performance. Reasons for wear and failure of rod conveyors: deviation of the belt during operation, intensive wear of the holding elements in the places of their attachment to the traction elements and the traction elements themselves. It was found that the degree of wear of the left and right runs is different, as a confirmation of the unevenness of the load on the belt during operation. The uneven load of the conveyor is caused both by the transported pile of root crops and by the design features of the conveyor itself, in particular, uneven tension of runs, deviations during installation of shafts, installation of sprockets or pulleys, support rollers, etc. External loads acting on structural elements of agricultural machines are variable quantities. This should be taken into account when determining the stress-strain state of structures. It is possible to estimate the stress-strain state of complex structures of root-harvesting machines, their elements, and search for their optimal parameters, provided that the force factors in the sections of the elements are determined under full stress. In this way, it is possible to optimise the designs of such machines in terms of material consumption and work resource. The proposed method makes it possible to estimate the stress-strain state of rod conveyor elements according to operating conditions and the possible ways of their further improvement.

1. Babii A., Dovbush T., Khomuk N., Dovbush A., Tson A., Oleksyuk V. 2022. Mathematical model of a loaded supporting frame of a solid fertilizers distributor. Procedia Structural Integrity. No. 36. Р. 203–210. Science Direct. URL: https://doi.org/10.1016/j.prostr.2022.01.025.
2. Hevko R. B., Tkachenko I. G., Rohatynskyi R. M., Synii S. V., Gladyo Y. B., Gradovy V. V. Systems of post-cleaning of Korean fruits during their mechanized harvesting: monograph. Ternopil: Osadtsa Yu.V., 2020. 216 p.
3. Dovbush T. A., Dovbush A. D., Khomyk N. I., 2014. Modyfikatsiia MMPED dlia rozkryttia statychnoi nevyznachenosti kryvoliniinykh elementiv ram [Modification of MMPED to disclose static uncertainty of curvilinear frame elements] «Tekhnichnyi servis dlia mashyn dlia roslynnytstva». Visnyk KhNTUSH im. P. Vasylenka. Kh.: KhNTUSH. Р. 105–110.
4. Dovbush T., Khomyk N., Dovbush A., Dunets B., 2019. Evaluation technique of frame residual operational life. Scientific Journal of TNTU (Tern.).Vol. 93. No. 1. Р. 61–69.
5. Rybak T. I., 2003. Poshukove konstruiuvannia na bazi optymizatsii resursu mobilnykh silskohospodarskykh mashyn [The searching constructing is on the base of optimization of resource of mobile agricultural machines] VAT «TVPK ZBRUCh», 332.
6. Rybak T. I., Popovych P. V., Khomyk N. I., Dovbush T. A., Tson H. B., 2013. Imitatsiine modeliuvannia pry rozrakhunkakh na kvazistatychnu mitsnist konstruktyvnykh struktur vazhko navantazhenykh silskohospo-darskykh mashyn [Simulation calculations on quasi-static strength structural structures are heavily loaded with agricultural machinery] Problemy nadiinosti mashyn ta zasobiv mekhanizatsii silskohospodarskoho vyrobnytstva. Visnyk KhNTUSH im. P. Vasylenka. Kh.: KhNTUSH. Р. 321–326.
7. Trokhaniak O. M, Hevko R. B., Lyashuk O. L. Pohrishchuk B. V. Dobizha N. V., Dovbush T. A., 2020. Research of the of bulk material movement process in the inactive zone between screw sections, INMATEH-agricultural engineering. Vol. 60. No. 1. Р. 261–268. DOI: 10.35633/inmateh-60-29.
8. Hevko R. B., Tkachenko I. G, Khomyk N. I., Gumeniuk Y. P, Flonts I. V., Gumeniuk O. O. 2020. Determination of technical-and-economic indices of root crop conveyer-separator during their motion on curved path. IMMATEH: Agricultural engineering. Vol. 61. No. 2. P. 175–182.
9. Dovbush T. A., Khomyk N. I., Babii A. V., Tsyon G. B., Dovbush A. D. Resistance of materials: a study guide for calculation and graphic work and independent work. Ternopil: individual-entrepreneur Palyanytsia V.A., 2022. 220 p.
10. Handbook on the mechanization of sugar beet production; ed. O. O. Protsenko. K.: Harvest, 1981. 231 p.
11. Khomyk N. I., Dovbush T. A. Justification of power factors of loading of rod conveyors. Processes, machines and equipment of agro-industrial production: problems of theory and practice: coll. abstracts of international reports science and practice conf. dedicated to the 90th anniversary of the birth of Professor Tymofiy Ivanovich Rybak and the 60th anniversary of the Department of Technical Mechanics and Agricultural Machinery, (Ternopil, September 29–30, 2022.) Ministry of Education and Science of Ukraine, Ternopil. the nation technical University named after I. Pulyuya [and others]. Ternopil: individual-entrepreneur Palyanitsa V. A., 2022. P. 140–141.
12. Khomyk N. I., Tson G. B., Dovbush T. A., Antonchak N. A. Basics of agronomy: a study guide for practical classes and independent work. Ternopil: individual-entrepreneur Palyanitsa V. A., 2021. 320 p.
13. Khomyk N. I., Tson G. B., Dovbush T. A., Oleksyuk V. P. Basics of agronomy: textbook (course of lectures). Ternopil: individual-entrepreneur Palyanitsa V. A., 2021. 232 p.
14. Khomyk N. I., Rybak T. I. Development of a model for assessing the stress-strain state of elements of rod conveyors of beet-harvesting machines.Mechanical science. 2002. № 6. P. 25–27.
15. Khomyk N. I. Research of rod conveyors of root-harvesting machines taking into account the characteristics of the load: dis... Ph.D. technical Sciences: 05.05.11. Ternopil: TDTU, 2003.180 p.
16. Shabelnyk B. P. Theory and practical substantiation of the parameters of the working bodies of beet harvesters. Kharkiv, 2001. 314 p.

1. Babii A., Dovbush T., Khomuk N., Dovbush A., Tson A., Oleksyuk V. 2022. Mathematical model of a loaded supporting frame of a solid fertilizers distributor. Procedia Structural Integrity. No. 36. Р. 203–210. Science Direct. URL: https://doi.org/10.1016/j.prostr.2022.01.025.
2. Hevko R. B., Tkachenko I. G., Rohatynskyi R. M., Synii S. V., Gladyo Y. B., Gradovy V. V. Systems of post-cleaning of Korean fruits during their mechanized harvesting: monograph. Ternopil: Osadtsa Yu.V., 2020. 216 p.
3. Dovbush T. A., Dovbush A. D., Khomyk N. I., 2014. Modyfikatsiia MMPED dlia rozkryttia statychnoi nevyznachenosti kryvoliniinykh elementiv ram [Modification of MMPED to disclose static uncertainty of curvilinear frame elements] «Tekhnichnyi servis dlia mashyn dlia roslynnytstva». Visnyk KhNTUSH im. P. Vasylenka. Kh.: KhNTUSH. Р. 105–110.
4. Dovbush T., Khomyk N., Dovbush A., Dunets B., 2019. Evaluation technique of frame residual operational life. Scientific Journal of TNTU (Tern.).Vol. 93. No. 1. Р. 61–69.
5. Rybak T. I., 2003. Poshukove konstruiuvannia na bazi optymizatsii resursu mobilnykh silskohospodarskykh mashyn [The searching constructing is on the base of optimization of resource of mobile agricultural machines] VAT «TVPK ZBRUCh», 332.
6. Rybak T. I., Popovych P. V., Khomyk N. I., Dovbush T. A., Tson H. B., 2013. Imitatsiine modeliuvannia pry rozrakhunkakh na kvazistatychnu mitsnist konstruktyvnykh struktur vazhko navantazhenykh silskohospo-darskykh mashyn [Simulation calculations on quasi-static strength structural structures are heavily loaded with agricultural machinery] Problemy nadiinosti mashyn ta zasobiv mekhanizatsii silskohospodarskoho vyrobnytstva. Visnyk KhNTUSH im. P. Vasylenka. Kh.: KhNTUSH. Р. 321–326.
7. Trokhaniak O. M, Hevko R. B., Lyashuk O. L. Pohrishchuk B. V. Dobizha N. V., Dovbush T. A., 2020. Research of the of bulk material movement process in the inactive zone between screw sections, INMATEH-agricultural engineering. Vol. 60. No. 1. Р. 261–268. DOI: 10.35633/inmateh-60-29.
8. Hevko R. B., Tkachenko I. G, Khomyk N. I., Gumeniuk Y. P, Flonts I. V., Gumeniuk O. O. 2020. Determination of technical-and-economic indices of root crop conveyer-separator during their motion on curved path. IMMATEH: Agricultural engineering. Vol. 61. No. 2. P. 175–182.
9. Dovbush T. A., Khomyk N. I., Babii A. V., Tsyon G. B., Dovbush A. D. Resistance of materials: a study guide for calculation and graphic work and independent work. Ternopil: individual-entrepreneur Palyanytsia V.A., 2022. 220 p.
10. Handbook on the mechanization of sugar beet production; ed. O. O. Protsenko. K.: Harvest, 1981. 231 p.
11. Khomyk N. I., Dovbush T. A. Justification of power factors of loading of rod conveyors. Processes, machines and equipment of agro-industrial production: problems of theory and practice: coll. abstracts of international reports science and practice conf. dedicated to the 90th anniversary of the birth of Professor Tymofiy Ivanovich Rybak and the 60th anniversary of the Department of Technical Mechanics and Agricultural Machinery, (Ternopil, September 29–30, 2022.) Ministry of Education and Science of Ukraine, Ternopil. the nation technical University named after I. Pulyuya [and others]. Ternopil: individual-entrepreneur Palyanitsa V. A., 2022. P. 140–141.
12. Khomyk N. I., Tson G. B., Dovbush T. A., Antonchak N. A. Basics of agronomy: a study guide for practical classes and independent work. Ternopil: individual-entrepreneur Palyanitsa V. A., 2021. 320 p.
13. Khomyk N. I., Tson G. B., Dovbush T. A., Oleksyuk V. P. Basics of agronomy: textbook (course of lectures). Ternopil: individual-entrepreneur Palyanitsa V. A., 2021. 232 p.
14. Khomyk N. I., Rybak T. I. Development of a model for assessing the stress-strain state of elements of rod conveyors of beet-harvesting machines.Mechanical science. 2002. № 6. P. 25–27.
15. Khomyk N. I. Research of rod conveyors of root-harvesting machines taking into account the characteristics of the load: dis... Ph.D. technical Sciences: 05.05.11. Ternopil: TDTU, 2003.180 p.
16. Shabelnyk B. P. Theory and practical substantiation of the parameters of the working bodies of beet harvesters. Kharkiv, 2001. 314 p.