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Research Article
Justification of the Track Resistance of the Working Bodies of the Potato Planting Machine
Yuldashev Odiljon Tashpulatovich*
Issue:
Volume 12, Issue 4, December 2025
Pages:
75-80
Received:
3 September 2025
Accepted:
13 September 2025
Published:
10 October 2025
Abstract: In this study, the authors investigated the tractive resistance forces that arise during the operation of a potato planting machine equipped with a disc-type working body. This working organ simultaneously performs two essential functions in the planting process: it opens a furrow in the soil for placing potato seeds and forms a ridge that covers and protects the seeds after planting. The analysis was carried out by taking into account a number of interrelated factors that directly influence the magnitude of draft resistance. These include the total mass of the potato planting machine, the physical and mechanical characteristics of the soil (such as density, hardness, and moisture content), as well as the geometrical parameters of the cultivated soil cross-section. The configuration and structural design of the working part, the machine’s coverage width, the planting depth, and the forward speed of operation were also considered as significant variables. The findings demonstrate that the draft resistance of the potato planter is not determined by a single factor but results from the combined effects of machine design, soil conditions, and operational parameters. In particular, the resistance force depends heavily on the machine’s mass, the width of coverage, and the performance of its various working components, including the furrow opener, the seeding mechanism, and other auxiliary parts that contribute to the planting process. Moreover, planting depth and soil texture strongly influence the overall resistance encountered during field operation. Based on the calculations and analysis presented, it was established that when the machine operates at forward speeds ranging from 4 to 6 km/h, the tractive resistance values vary between 1.702 kN and 2.823 kN. These results provide important insights into the design optimization of potato planting machines and offer practical guidance for selecting tractors of suitable power, improving energy efficiency, and ensuring reliable field performance under varying soil and load conditions.
Abstract: In this study, the authors investigated the tractive resistance forces that arise during the operation of a potato planting machine equipped with a disc-type working body. This working organ simultaneously performs two essential functions in the planting process: it opens a furrow in the soil for placing potato seeds and forms a ridge that covers a...
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Research Article
Determination of the Axial Velocity of the Material Being Sorted in a Rotating Perforated Drum
Issue:
Volume 12, Issue 4, December 2025
Pages:
81-86
Received:
6 September 2025
Accepted:
18 September 2025
Published:
10 October 2025
Abstract: This article provides a comprehensive investigation into the motion of bulk materials inside a perforated rotating drum separator, paying particular attention to the correlation between the kinematic characteristics of particles, the structural and geometric parameters of the drum, and the combined effects of gravitational and centrifugal forces. The study develops a theoretical model that captures the dynamics of axial velocity and the residence (exit) time of bulk materials as they move under the simultaneous influence of rotational motion, centrifugal action, and the inclination of the drum relative to the horizontal plane. To establish the governing relationships, Newton’s second law of motion is employed together with energy-based analytical formulations, which makes it possible to derive mathematical expressions describing both the axial displacement of the particles and the time required for their discharge from the drum. These analytical equations are subsequently solved numerically using Microsoft Excel across a wide range of operating conditions, including variations in rotational speed, inclination angle, drum diameter, and length. The numerical results reveal that the axial velocity of the bulk material reaches a stable value after a relatively short transient phase, indicating a quasi-steady state of motion within the drum. In addition, it is shown that the discharge or exit time of the material grows almost linearly with increases in drum length and other key operating parameters, which confirms the strong dependence of throughput capacity on design variables. The outcomes of the research clearly demonstrate that angular velocity of the drum and its inclination angle play a decisive role in governing the efficiency of the screening process. These parameters not only affect the residence time of particles but also determine the quality of separation and the overall performance of the equipment. The developed model and the obtained findings thus provide a reliable theoretical and numerical foundation for the scientific optimization of perforated drum separator design, enabling engineers to enhance process efficiency, reduce energy consumption, and improve the uniformity of material separation in industrial applications.
Abstract: This article provides a comprehensive investigation into the motion of bulk materials inside a perforated rotating drum separator, paying particular attention to the correlation between the kinematic characteristics of particles, the structural and geometric parameters of the drum, and the combined effects of gravitational and centrifugal forces. T...
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Research Article
The Theoretical Foundations of the Thermal Conductivity of Housing-Type Part Assemblies Restored with WEICON-TI Metal Polymer
Issue:
Volume 12, Issue 4, December 2025
Pages:
87-92
Received:
30 September 2025
Accepted:
14 October 2025
Published:
28 October 2025
DOI:
10.11648/j.ajma.20251204.13
Downloads:
Views:
Abstract: This article explores the theoretical foundations for improving the durability of housing-type parts restored with WEICON-TI metal-polymer, focusing especially on bearing assemblies, where thermal conductivity is crucial. Modern mechanical systems rely heavily on the reliable performance of bearings, as they are constantly exposed to dynamic loads, friction, and varying operating temperatures. When the housing surfaces become worn or damaged, restoring them using polymer-metal composites like WEICON-TI provides an efficient and cost-effective alternative to traditional repair methods. One of the key factors affecting the performance of these restored assemblies is the material’s ability to conduct heat away from contact surfaces. Proper thermal conductivity not only helps stabilize operating temperatures but also reduces the risk of localized overheating, which can lead to accelerated wear, microstructural damage, or even failure of the assembly. Therefore, understanding the principles of heat transfer in metal-polymer restored surfaces is essential for predicting service life and ensuring long-term reliability. This article systematically analyzes these theoretical aspects and shows how the thermal conductivity of WEICON-TI contributes to the enhanced load-bearing capacity, stability, and operational safety of restored bearing assemblies. By efficiently transferring heat, the material prevents excessive temperature rises, minimizes wear, and helps maintain the mechanical integrity of the system. As a result, parts restored with WEICON-TI last longer, operate more safely, and provide more stable performance under demanding conditions. Understanding these principles allows engineers to optimize repair processes and ensure that mechanical systems continue to function reliably over time, even in challenging thermal and mechanical environments.
Abstract: This article explores the theoretical foundations for improving the durability of housing-type parts restored with WEICON-TI metal-polymer, focusing especially on bearing assemblies, where thermal conductivity is crucial. Modern mechanical systems rely heavily on the reliable performance of bearings, as they are constantly exposed to dynamic loads,...
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