DOI: https://doi.org/10.32515/2414-3820.2022.52.12-24

Research and Substantiation of the Design Spring Wrapper of the Precision Seed Drill

Dmytro Artemenko, Volodymyr Onopa

About the Authors

Dmytro Artemenko, Associate Professor, PhD in Technics (Candidate of Technics Sciences), Central Ukrainian National Technical University, Kropyvnytskyi, Ukraine, e-mail: artemenkodyu@kntu.kr.ua, ORCID ID: 0000-0002-6633-0470

Volodymyr Onopa, Associate Professor, PhD in Technics (Candidate of Technics Sciences), Central Ukrainian National Technical University, Kropyvnytskyi, Ukraine, e-mail: pc_kntu@ukr.net, ORCID ID: 0000-0002-9177-5746

Abstract

The article presents the results of exploratory theoretical studies of the constructive and technological parameters spring wrapper of the precision seed drill. The analysis of the existing designs of wrappers and the technological process they perform showed that today the requirements for wrapping seeds first with wet layers of soil and then with drier, modern wrappers are not met. In most sowing sections, wrappers are placed after the rolling rollers and they perform the function of mulching and planning the surface of the furrow by mixing soil layers of different horizons. It was established that the technological process of wrapping the seeds with wrappers, which are first covered with the lower moist layers of the soil, and then with a drier mulch layer, will be more rational, while the wrappers must be installed after the coulter, which is able to cover the seeds immediately after entering the furrow. Since the main disadvantage of the existing wrappers is the mixing of soil layers during their operation, an improved design of the wrapper was developed. The wrapper, which is made of a spring and has several component parts, has a torsion spring and a rod in the upper part, in the lower part of which there is a working surface in the form of a two-level rectangular trihedral inclined prism, moreover, the upper level of the working surface is twice as long as the lower one, and the installation angle of the working surface is smaller than the angle of friction of the soil on the steel. The efficiency of the wrapper is ensured by the following factors: due to the increased length of the upper working surface of the wrapper, the dry soil of the upper layer covers the furrow, which is already covered by the lower moist layers of the soil; due to the lateral action of the wrapper on the soil layer and the operation of the spring, a mulching effect is created; when the soil is more clogged with plant remains, the design of the spring wrapper contributes to its self-cleaning. The process of interaction of the working surface wrapper with the soil and the influence of its design on the technological characteristics of the technological process are theoretically considered. The main technological characteristic of the wrapper is its tensile strength. It was established that during the operation of the developed wrapper, the greatest influence on the traction resistance is exerted by the depth of the movement wrapper and the speed of movement wrapper, and the least by the inclination of the working surface. The obtained theoretical dependence connects the design and technological parameters of the spring wrapper and their influence on the main characteristic of its operation - traction resistance.

Keywords

favorable germination conditions, wrapper design, seed wrapping, combined spring wrapper

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References

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