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xxx V. Bulgakov, I. Holovach, V. Adamchuk, S. Ivanovs, V. Melnik, Ye. Ihnatiev and J. Olt
Research into geometric parameters of digging shares used for lifting sugar beet roots from soil with assistance of vibration
Abstract |
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Research into geometric parameters of digging shares used for lifting sugar beet roots from soil with assistance of vibration

V. Bulgakov¹, I. Holovach¹, V. Adamchuk², S. Ivanovs³, V. Melnik⁴, Ye. Ihnatiev⁵ and J. Olt⁶*

¹National University of Life and Environmental Sciences of Ukraine, 15 Heroyiv Oborony Str., UA 03041 Kyiv, Ukraine
²National Scientific Centre, Institute for Agricultural Engineering and Electrification, 11 Vokzalna Str., Glevakcha 1, Vasylkiv District, UA 08631 Kyiv Region, Ukraine
³Latvia University of Life Sciences and Technologies, 2 Liela Str., LV 3001 Jelgava, Latvia
⁴Kharkiv Petro Vasylenko National Technical University of Agriculture, 44 Alchevskih Str., UA 61002 Kharkiv, Ukraine
⁵Dmytro Motornyi Tavria State Agrotechnological University, 18B, Khmelnytsky Ave, UA 72310, Melitopol, Zaporozhye Region, Ukraine
⁶Estonian University of Life Sciences, Institute of Technology, 56 Kreutzwaldi Str., EE5 1006Tartu, Estonia
*Correspondence: jyri.olt@emu.ee

Abstract:

One of the important conditions in securing the high quality, when performing the work process of vibrational root lifting, is to avoid damaging the roots. It is obvious that the greatest probability of damaging and even breaking the lifted root arises, when the tool interacts with the root body during their first contact and in the time of the root passing in the throat between the operating shares. The aim of the study is to substantiate the rational design length for the working throat of the vibrational root lifter in its interaction with the sugar beet root while lifting the latter from the soil. As a result of the completed research, the minimum permissible tool oscillation frequencies have been determined for the specific values of the lifter’s translational velocity and the working throat rear part length, at which the event of the vibrational lifting tool gripping the root will occur at least one time. For example, when the length of the lifter’s working throat rear part is equal to 0.1 m and the oscillation frequency is equal to ν = 20.3 Hz, the satisfactory quality of the vibrational root lifting process is ensured, when the velocity of the translational motion performed by the vibrational lifter stays within the range of 1.3–2.55 m s–1. In order to ensure the good quality of the vibrational root lifting process at the lifter’s translational velocity equal to V = 2.0 m s–1 and the frequency of its tool’s oscillations equal to ν = 10 Hz, it is necessary that the length of the lifter’s working throat rear part is equal to 0.2 m, at a tool oscillation frequency of 6.7 Hz – 0.3 m. As a result of the completed numerical calculations, the permissible values have been determined for the tool oscillation frequency, which can be recommended for the translational velocities within the range of 1.3–2.2 m s–1,
taking into account the limitation set for the tool oscillation frequency by the pre-condition of the guaranteed gripping of each root by the digging shares.

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