The optimization of parameters of a safety element of the finger mechanism of the header auger of a combine harvester
- Authors: Kotov A.V.1
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Affiliations:
- Seismotekhnika
- Issue: Vol 90, No 1 (2023)
- Pages: 13-24
- Section: New machines and equipment
- URL: https://journals.rcsi.science/0321-4443/article/view/132479
- DOI: https://doi.org/10.17816/0321-4443-114970
- ID: 132479
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Abstract
BACKGROUND: One of the most frequently recorded failures of structural elements of the header auger of a combine harvester is the failure of the fingers of the finger mechanism. Many manufacturers of grain harvesting equipment introduce a safety element into the design of the finger mechanism which is a groove on the finger. The optimal location of this groove with relation to the axis of rotation of the pin allows to ensure the breakage of the auger finger not along the main diameter but along the groove at a certain section of the working stroke of the mechanism.
AIMS: In the specific technical literature, no special attention is paid to the analytical calculations of the structural elements of the finger mechanism of the header auger that requires the development of appropriate mathematical models depending on the targets.
METHODS: This paper presents a mathematical model of the finger mechanism of the header auger of a combine harvester, based on the use of vector analysis, which has been successfully used by the author for a long time in the development of various lever mechanisms. The proposed vector analysis method is based on the coordinate transformation method.
RESULTS: The mathematical model of the finger mechanism of the auger presented in the article made it possible to describe the kinematics of all of its hardpoints, to determine the vectors of angular velocities and accelerations of the links, to carry out a force analysis with optimization of the position of the safety element on the finger as well as to obtain and to study various graphical dependencies. The developed mathematical model provides a comprehensive description of the kinematic and force parameters of the considered mechanism for all of its positions.
CONCLUSIONS: The presented mathematical model of the finger mechanism made it possible to successfully optimize the parameters of the location of the safety element on the finger - the groove, thereby ensuring the maximum angle of coverage of the zone of possible breakage of the finger along the groove.
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##article.viewOnOriginalSite##About the authors
Andrey V. Kotov
Seismotekhnika
Author for correspondence.
Email: androskv@mail.ru
ORCID iD: 0000-0001-7247-043X
SPIN-code: 2820-0804
Lead Design Engineer
Belarus, Gomel
References
- Kotov AV, Chuprynin YuV. Application of vector analysis in the design of lever mechanisms. In: Scientific and technical progress in agricultural production: materials of the international. scientific-practical. conf. Minsk; 2007:32–37.
- Kotov AV, Chuprynin YuV. Application of vector analysis to optimize the drive mechanism of the grain cleaning system of a combine harvester during its design. Mekhanika mashin, mekhanizmov i materialov. 2009;2(7):43–48.
- Bertyaev VD. Theoretical mechanics based on MathCAD: workshop. Saint Petersburg: BKhV-Peterburg; 2005.
- Merko MA, Kolotov AV, Mesnyankin MV. et al. Theory of mechanisms and machines. Lever mechanisms: workshop. Krasnoyarsk: Sib. feder. un-t; 2016.
- Dyuzhev AA, Kotov AV, Chuprynin YuV. Ensuring the universality of the hinged device of the power facility UES-2-250A “Polesye” in order to create modular-type agricultural units. In: Energy-saving technologies and technical means in agriculture. production: dokl. intl. scientific-practical. conf.: in 2 parts. Minsk; 2008;1:78–74.
- Bobyrenko SV, Kotov AV. Simulation of the process of operation of the mechanism for pre-pressing the feeding apparatus of a forage harvester. Vestnik BRU. 2010;1(30):18–26.
- Rekhlitsky OV, Dzhasov DV, Trukhanovich SV. Synthesis of balancing mechanisms with gas springs using vector analysis. In: Topical issues of mechanical engineering: a collection of scientific papers. Minsk;2013;2:106–110.
- Kolovsky MZ, Evgrafov AN, Semenov YuA. et al. Theory of mechanisms and machines: textbook. allowance for students. Moscow: Akademiya; 2008.
- Savchuk VP, Medvedev DG, Vyarvilskaya ON. Theoretical mechanics: textbook. Minsk: BGU; 2016.
- Chernaya LA. Kinematic and kinetostatic study of flat lever mechanisms in MathCAD and AutoCAD systems: guidelines for homework on the theory of mechanisms and mechanics of machines. Moscow: MGTU im. NE Baumana; 2017.
- Reznik NE. Forage harvesters. Moscow: Mashinostroenie; 1980.
- Turbin BG, Lurie AB, Grigoriev SM. et al. Agricultural machines: Theory and technological calculation. Leningrad: Mashinostroenie; 1967.