Smart Search 


4_2021_sen_5

Title of the article SIMULATION OF ACCELERATED TESTING OF KNIVES OF CUTTING-REDUCING DEVICES OF FORAGE HARVESTERS
Authors

TYURIN Sergey A., Ph. D. in Eng., Associate Professor of the Department “Agricultural Machines”, Sukhoi State Technical University of Gomel, Gomel, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

POPOV Victor B., Ph. D. in Eng., Assoc. Prof., Head of the Department “Agricultural Machines”, Sukhoi State Technical University of Gomel, Gomel, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

DROBYSHEVSKIY Pavel S., Head of the Laboratory of Complex Testing and Welding, OJSC “Gomselmash”, Gomel, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICAL ENGINEERING COMPONENTS
Year 2021
Issue 4(57)
Pages 41–47
Type of article RAR
Index UDK 631.352.022
DOI https://doi.org/10.46864/1995-0470-2021-4-57-41-47
Abstract A method is proposed and a technique is developed for accelerated bench tests in laboratory conditions of knives of cutting-reducing devices of forage harvesters. One of the main purposes of the developed method is an experimental comparative assessment of the long-term performance (according to the wear resistance criterion) of various knife options (according to the materials for their manufacture and structural and geometric parameters). The proposed test method solves the problem of assessing the wear resistance of agricultural harvester knives by two parameters: physical depreciation and dulling of their cutting edge. A flexible belt with an abrasive fixed on one of its surfaces is used as counter-specimens during testing, which allows for wear with sliding impact and thereby significantly accelerates the process of knives damage. The technique makes it possible to test simultaneously two knives made using different technologies, under comparable conditions. In addition, to speed up testing, not one, but several counter-specimens are mounted on the test equipment. As a result of such tests, the process of impact-fatigue loading with slipping is simulated and the damage to the knife is reproduced, which is close to the operational one: wear and an increase in the cutting edge radius. Using the developed technique, comparative accelerated tests of imported steel and domestic cast iron (produced by OJSC “Gomselmash”) knives made using various technologies were carried out. The tests conducted made it possible to quantify the difference in the service characteristics of the cutting drum knives made using various technologies, which confirms its usefulness and efficiency. The developed technique was approved in accordance with the established procedure and is used for bench testing of knives at OJSC “Gomselmash”.
Keywords forage harvester, cutting-reducing device, knife, testing, technique
  You can access full text version of the article.
Bibliography
  1. Kombayn kormouborochnyy vysokoproizvoditelnyy KVK-8060 v komplektatsii s zhatkoy dlya grubostebelnykh kultur [High-performance forage harvester KVK-8060 with a platform for rough-stemmed crops]. Selskiy mechanizator, 2017, no. 10, p. 15 (in Russ.).
  2. Rekhlitskiy O.V., Lipskaya V.K. Kormouborochnyy kombayn KVK-8060 — novyy etap v otechestvennom kombaynostroenii [Forage harvester KVK-8060 — a new stage in the domestic combine industry]. Materialy mezhdunarodnoy nauchno-prakticheskoy konferentsii “Nauchno-tekhnicheskiy progress v sel47 skokhozyaystvennom proizvodstve” [Proc. International Scientific and Practical Conference “Scientific and technological progress in agricultural production”]. Minsk, 2010, vol. 2, pp. 3–8 (in Russ.).
  3. Rekhlitskiy O.V., Popov V.B. Razvitie kormouborochnoy tekhniki proizvodstva PO “Gomselmash” [Development of forage harvesting equipment manufactured by PO “Gomselmash”]. Materialy 13 mezhdunarodnoy nauchno-tekhnicheskoy konferentsii studentov, magistrantov i molodykh uchenykh “Issledovaniya i razrabotki v oblasti mashinostroeniya, energetiki i upravleniya” [Proc. 13th International Scientific and Technical Conference of students, undergraduates and young scientists “Research and development in the field of mechanical engineering, energy and management”]. Gomel, 2013, pp. 11–19 (in Russ.).
  4. Sherbakov S.S. Napryazhenno-deformirovannoe sostoyanie i povrezhdaemost tribofaticheskoy sistemy “prizhim — nozh — opora” rezhushchego instrumenta kombayna [Stress-strain state and damage of tribo-fatigue system “clamp — knife — base” of harvester cutting instrument]. Mechanics of machines, mechanisms and materials, 2012, no. 2(19), pp. 75–80 (in Russ.).
  5. Sherbakov S.S., Nasan O.A. Obemnaya povrezhdaemost i iznos nozha v tribofaticheskoy sisteme rezhushchego instrumenta kormouborochnogo kombayna [Volume damageability and wear of knife in the tribo-fatigue system of cutting unit of agricultural harvester]. Bulletin of BSUT: science and transport, 2016, no. 1(32), pp. 209–217 (in Russ.).
  6. Sosnovskiy L.A., Zhmaylik V.A., Psyrkov N.V. Chugun s sharovidnym grafitom i vysokim soprotivleniem ustalosti [Cast iron with spherical graphite and high fatigue resistance]. Patent BY, no. 15617, 2012 (in Russ.).
  7. Standard of Belarus STB 2544–2019. Vysokoprochnyy chugun s sharovidnym grafitom i vysokim soprotivleniem ustalosti. Marki i mekhanicheskie svoystva [High-strength cast iron with spherical graphite and high fatigue resistance. Brands and mechanical properties]. Minsk, Gosstadart Publ., 2019. 7 p. (in Russ.).
  8. Zhmaylik V.A., Psyrkov N.V., Komissarov V.V., Zamyatnin V.O., Sosnovskiy L.A. Spetsialnyy vysokoprochnyy chugun s sharovidnym grafitom kak konkurent uprochnennoy stali [Special high-strength cast iron with spherical graphite as a competitor to hardened steel]. Trudy 6 Mezhdunarodnogo simpoziuma po tribofatike (ISTF 2010) [Proc. 6th International symposium on tribo-fatigue (ISTF 2010)]. Minsk, 2010, vol. 2, pp. 73–77 (in Russ.).
  9. Novikov A.A., Drobyshevskiy P.S., Tyurin S.A., Chumak D.S. Mekhanicheskie i ekspluatatsionnye svoystva chuguna marki VChTG [Mechanical and operational properties of cast iron of the ВЧТГ (VChTG) brand]. Vestnik GGTU im. P.O. Sukhogo, 2018, no. 1(72), pp. 61–69 (in Russ.).
  10. Nozhi kormouborochnykh kombaynov KVK-800. Metodika sravnitelnykh stendovykh uskorennykh ispytaniy [Knives of KVK-800 forage harvesters. Methodology of comparative bench accelerated tests]. Gomel, Gomselmash Publ., 2014. 11 p. (in Russ.).