Збірники наукових праць ЦНТУ

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Теоретичні дослідження динаміки переміщення зерна по поверхні вертикального циліндричного решета з рифами
(КНТУ, 2014) Степаненко, С. П.; Швидя, В. О.; Stepanenko, S.; Shvidia, V.
В статті на основі рівнянь динаміки складено і розв’язано диференційні рівняння руху зерна по поверхні вертикального циліндричного решета з рифами. Development of mathematical model of moving of grain on the surface of vertical cylindrical sieve at presence of harmonic vibrations and reefs on his surface. Let a weevil move without wedging on the surface of vertical cylindrical sieve by the radius of R by з reefs, that present the semi-sphere of radius of r. Thus distance between reefs makes L. A sieve carries out a rotation about vertical axis with an angulator ω2 and simultaneously, fluctuating motion on the harmonic law of вздоль vertical line with an angulator ω1. Differential equalization is equalization of the special kind decision of that not виражается in elementary functions. Meantime, the numeral methods of integration allow to decide these types of equalizations. We will take advantage of numeral method of Рунге-Кутта, that it is realized by the function of Odesolve of package of softwares of MathCad 13. The got graphic dependences show that time of motion on a sieve increases as compared to a surface without reefs (r=0) at the radius of reefs equal 5 мм. over the Further increase of radius of reefs brings to reduction of time of motion on the vertical area of sieve with reefs, that it is related to the tails of weevil from the surface of reef and flight above some flat vertical cylindrical part of sieve. Reduction of time of motion on a sieve according to basic equalization of separation worsens technological efficiency of separation and beside the purpose. The mathematical model of motion of grain is worked out on the surface of vertical cylindrical sieve with reefs on the basis of differential equalization taking into account the construction parameters of reefs. The analysis of decisions of the got differential equalization shows that time of motion of grain on the surface of sieve, maybe, to increase at the radius of reef scope and distance from a 5-7,5 mm between reefs 20-30 mm.
Вплив травмування на міцність насіння зернових культур
(КНТУ, 2014) Дерев’янко, Д. А.; Derevyanko, D.
В статті розглядаються дослідження травмування та руйнування зернівок від впливу зовнішніх та внутрішніх факторів. The paper considers the research of the weevil damage and compression as a result of inner and outer factors. The effects of damaging on the solidity of the cereal seeds. In the process of a constant weevils damaging a plastic zone appears at the end of a crack at the end of damaging the increase in pressure results in additional efforts in the zone of a plastic deformation. These additional efforts lead to the increase in microdamages which are the basis for the creation of the future weevils cracking resulting in their damaging. The nature of weevils damaging depends on the cracks size and guantity as well as on their location. Being taker together they effect the seeds solidity, that is their damages and deformities.
Дослідження впливу механічних навантажень на травмування насіння барабанними та аксіально-роторними обмолочувальними апаратами
(КНТУ, 2014) Дерев’янко, Д. А.; Derevianko, Dmitry
В статті проводяться теоретичні розрахунки та обґрунтування впливу різних обмолочувальних апаратів на травмування насіння зернових культур. Розглядаються головні відмінності режимів роботи таких апаратів та їх вплив на пошкодження і травмування зернівок. The theoretical calculations and the substantiations of the effects of different threshing devices on the damage of the grain crops seeds are given in the paper. The principal differences in the work regimes of such devices as well as their effects on the weevils damage and compression are considered in the paper.

Збірники наукових праць ЦНТУ

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