DOI: https://doi.org/10.32515/2414-3820.2021.51.70-77

The Influence of the Parameters of a Chopping Rotor for Plant Residues on the Reliability of the Technological Process

Vasyl Salo, Serhii Leshchenko, Dmytro Bohatyrov

About the Authors

Vasyl Salo, Professor, Doctor in Technics (Doctor of Technics Sciences), Central Ukrainian National Technical University, Kropyvnytskyi, Ukraine, e-mail: salovm@ukr.net, ORCID ID: 0000-0003-2263-6002

Serhii Leshchenko, Associate Professor, PhD in Technics (Candidate of Technics Sciences), Central Ukrainian National Technical University, Kropyvnytskyi, Ukraine, e-mail: serafsgm@ukr.net, ORCID ID: 0000-0001-9339-4691

Dmytro Bohatyrov, Associate Professor, PhD in Technics (Candidate of Technics Sciences), Central Ukrainian National Technical University, Kropyvnytskyi, Ukraine, e-mail: asbdv@ukr.net, ORCID ID: 0000-0002-8997-5466

Abstract

The paper presents the assessment of the parameters of a chopping rotor for shredding plant residues for the reliability of the technological process. The general objective of the work is to substantiate the design and experimental identification of rational parameters of crimp-rollers of plant residues based on the condition of preventing clogging of the inter-knife space with plant-soil mass. The existing designs of crimp-rollers of plant residues are analyzed and the interrelation of certain constructive and technological parameters of shredders on qualitative indicators of their operation and possibility of clogging of inter-knife space is substantiated. The design of a large diameter crimp-roller provides simultaneous full contact with soil of two and sometimes three knives, which during the operation of the roller, together with cutting stems, provides them clamping with soil particles between adjacent knives. The probability of clogging between knives with plant and soil mass increases sharply with the humidity level of the material. Experimental studies have been conducted to assess the effect of the angle of inclination between adjacent knives and the operating velocity of the unit on the probability of clogging the inter-knife space. It is proved that increasing the speed of the shredders and increasing the decay angle between the knives help to reduce clogging of the inter-knife space with plant-soil mass, even at high humidity. The introduction of technological processes of effective preparation of plant residues in the production of crop products will allow starting the system of soil conservation at a farm. It is most expedient to grind plant residues with driveless roller shredders, the main operating parts of which are rollers with knives mounted on the cylinder, and depending on the purpose, quantity and type of plant residues, rollers with large and small diameters are practically used. When shredding high-stem plant residues, it is recommended to use crimp-rollers of large diameter with the following parameters: speed of the unit is 7…8 m/s, the decay angle between adjacent knives is 42… 46º. These parameters of the crimp-roller of plant residues reduce the probability of clogging the inter-knife space to 8%.

Keywords

crop residue shredders, crimp-roller, inter-knife space, rotor rolling, clogging of the inter-knife space, plant-soil mass, knife decay angle, unit operating speed

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References

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