Theoretical investigations of the oscillations of the cleaner of the root crop heads hanged on an integral row-crop tractor

Abstract

Abstract. There is proposed a new design of a trailed sugar beet head cleaner from the remnants of tops without extraction of beets from the soil, with a vertical cleaning shaft. However, the quality of its operation depends to a large extent on the magnitude of the vertical oscillations of the cleaner frame, which take place at a high speed of its forward movement. According to the developed equivalent scheme and the initial equations in the form of Lagrange of the 2nd kind, a mathematical model has been constructed for the root crop head cleaner, hanged from behind to an integral tractor, consisting of two nonlinear differential equations describing the oscillations of its pneumatic tracer wheels and the cleaning tool when moving along the surface irregularities. Numerical simulation on the PC has made it possible to determine the optimal design and kinematic parameters of the cleaner, allowing to reduce the magnitude of oscillations of its tracer wheels, frame and cleaning tool, which, on the whole, significantly increases the efficiency and quality of the root crop cleaning from the tops without extracting the root crops from the soil.Keywords: sugar beet, harvesting, cleaner, oscillations. IntroductionSugar beet is an important agricultural crop used for the production of sugar; and it also has great prospects for the production of bioenergy [1]. The leading producers of sugar beet in Europe are Ukraine, Germany, France and Poland. Contemporary technologies of harvesting sugar beet tops assume, at first, complete uncopied cutting of the main green mass with subsequent individual postcleaning of the heads of root crops from the remnants of the foliage [2]. The operation of additional cleaning of the root crop heads from the remnants of tops (leaves) without extracting the heads from the soil should meet high demands for the quality of removal of the green and dry residues from the surfaces of the heads, excluding damage caused by the additional cleaning tools. We have developed a new design of a trailed cleaner of sugar beet heads from the remnants of tops (leaves), with a vertical cleaning shaft. However, the quality of its operation depends to a large extent on the magnitude of the vertical oscillations of the cleaner frame, which take place at a high speed of its forwards movement. The use of pneumatic tracer wheels causes intensive oscillations of the root crop head cleaner in a vertical plane, which have the greatest effect on the quality of this technological process. In this connection, a need arises for theoretical investigation of the movement of a root crop head cleaner attached to the wheeled integral row-crop aggregating tractor and for determining the degree of influence of its structural and kinematic parameters on the vibrations in the vertical plane. The method of constructing computational mathematical models of agricultural machines is described in detail in [3]. A methodology of constructing computational mathematical models of agricultural machines is described in detail in [3], in which ...

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