Open AccessTHEORETICAL STUDY OF THE STABILITY OF THE ELASTIC TUBING BOX
Author(s) -
E. N. Alekseev,
Evgeniy Alekseev,
Иван Максимов,
Иван Максимов,
Петр Мишин,
Петр Мишин,
A. T. Terent'ev,
A. G. Terent’ev,
Николай Александрович Кириллов,
Nikolay Kirillov,
Губейдулла Юнусов,
Gubeydulla Yunusov,
Светлана Овчукова,
Светлана Овчукова
Publication year - 2018
Publication title -
vestnik kazanskogo gosudarstvennogo agrarnogo universiteta
Language(s) - English
Resource type - Journals
ISSN - 2073-0462
DOI - 10.12737/article_5b350530ecc138.12210815
Subject(s) - mechanics , seeding , nozzle , tube (container) , airflow , mathematics , materials science , physics , thermodynamics , composite material
The use of subsoil-scattered seeding of cereal crops allows to achieve seed distribution on the packed bed along the entire width of the seeding machine. With this seeding method, the seeds are evenly distributed relative to each other, which creates the same conditions for nutrition and plant growth. In order to obtain a better distribution of seeds in the podlag space, the use of air flow is suggested when transporting seeds from the seeder to the opener and the oscillatory process of the distributor. The flow of the air-grain flow from the cantilevered suspension elastic tube causes the action of longitudinal compressive forces, the directions of which coincide with the tangent to the axis at the end of the tube, that is, the so-called “tracking” force arises. The deviations of an elastic scattering pipe under conditions of relatively small and large deviations from the axis of the pipe are considered. This approach of theoretical research allows us to judge the correctness of the selected models by agreeing on the results obtained. Based on the results of the study, analytical expressions were obtained that allow us to determine the coordinates of the location of the deflected tube as a function of the speed of the air-grain flow for a qualitative distribution of seeds in the sublobe space, the critical value of the tube deflection angle equal to θ = 1.173 rad, which corresponds to the coefficient of friction of the medium fm = 0 , 2.