International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

The presented research results concern the amount of work and energy incurred in the grain production technology and the aspect of the quality of separating grain from the cob cores. The dynamic increase in the area of sweet corn cultivation for processing purposes (canning, freezing) affects the fact that manual harvesting is increasingly being replaced by combine harvesting. It ensures higher and energy-efficient work efficiency, as well as harvesting at the optimal stage of ripeness, which is particularly important in the case of sweet corn. Sweet corn cobs of the Candle variety were harvested with a Bourgoin combine harvester at the stage of late-milk maturity, and then subjected to processing consisting in de-shirting and cutting off the grain The quality requirements of the separated grain are, m.in: smooth surface and equal length of the cut grains, no mechanical damage and low losses of weight and nutrients. The quality of the separated (cut) grain was analyzed by measuring the length and surface condition of the cut grain. Grain with weight losses was classified as grain of inferior quality. The grains were cut off on a cutter for variables ranging from 167.5 to 301.2 rad/s angular velocity of the knife head and constant linear speed of the cob feeder 0.31 m/s. For comparison purposes, grain is divided into three classes. The workload incurred for the combine cob harvesting was the highest for post-harvest processing of cobs – 31% and soil cultivation – 27%, and energy expenditures for soil cultivation – 341 kWh/ha and for combine harvesting – 285 kWh/ha. The length of the cut grain increased by 26% in class I, and decreased by 14% in class II and by 11% in class III. On the other hand, the share of grain of inferior quality decreased in class I by 5%, in class II by 7% and in class II by 3%.

This publication presents an analysis of the operation of an active undermining assembly in the form of two symmetrical, oscillating feet, designed for machine harvesting of carrots. The use of the proposed assembly makes it possible to effectively loosen the soil layers close to the carrot roots, which significantly reduces the force required to pull the roots out of the soil.

This study attempts to address the problem of excessive soil compaction in the subsoil layer caused by the movement and operation of agricultural machinery by modifying the plough design to combine two operations with high energy requirements, ploughing and subsoiling. The aim of this study was to modify and develop the design of the share plough by adding an additional frame (heavy-duty tines) on which the mounted working elements operate below the ploughing layer immediately after the wheel travels on the bottom of the furrow and behind the first and the second plough bodies, using different tines settings (depth and type), at different speeds, to loosen the effect of the wheel travel before it is buried by the soil that cuts during the ploughing operation. The effect of the plough modification was to destroy the plow pan, leading to a decrease in the penetration resistance of the soil in the subsoil layer.

An improved methodological approach to assessing the vibration levels of passengers of a mobile car during its virtual tests on mathematical models in the design problem of choosing the parameters of the general layout and suspension of electric bus 6K2 is considered. When considering human vibrations in a machine, it is advisable to determine them taking into account the structure of the human body. Harmless vibration levels for different parts of the body are significantly different in amplitude and frequency. Vibration levels affecting a person be determined on the basis of two-mass and four-mass models of the human body, as recomended The International Organization for Standardization ISO. A computational experiment of parametric optimization of the suspension according to the proposed approach and criteria-rules allows you to find the required rational suspension parameters of the machine. The following considerations allow to carry out structural optimization of the layout of the passenger compartment of the electric bus, considering the effect of occupancy of the passenger compartment and schemes for random placement of passengers across the passenger compartment.

The article presents an analysis of the kinematics, working parameters and modes of operation of swing-type digging share with elliptical profile cutting edge, and opportunities for rational operating regime adjustment of the working body under the conditions of operation. Expressions are derived and an analysis of kinematics, working and regime parameters of the swing-type share with elliptical cutting edge is given.

The aim of the study was to evaluate the horizontal and vertical force of reversible moldboard plow at various operation depth and speed. A complete randomized block design was used with three replications, the first treatment was tillage depth with three levels 15, 20 25 cm and the second treatment was the forward speed with two levels 3.9, 6.3 km·h-1. The result showed that both forces were increased as increased of tillage depth and speed, however, the operation depth was more effective than speed, on the other hand, the horizontal force was more affected than vertical force by increasing both of depth and speed.