Installation for the investigation of screw working bodies with elastic surfaces and the results of their experimental tests

2021 ◽  
Vol 103 (3) ◽  
pp. 98-109
Author(s):  
Ivan Hevko ◽  
Oleh Liashuk ◽  
Oleg Tson ◽  
Taras Dovbush ◽  
Serhii Zalutskyi ◽  
...  
Keyword(s):  
Agricultural Production ◽  
Food Industry ◽  
Rotation Speed ◽  
Experimental Tests ◽  
Screw Conveyor ◽  
Theoretical Substantiation ◽  
Minimal Damage ◽  
Speed Selection ◽  
Working Bodies ◽  
Elastic Surfaces

Screw conveyors are widely used in various sectors of the economy determining specific requirements for them. One of such requirements is the possibility of safe movement of brittle elements and products with possible increased damage (injury) in pharmaceutical industry, electronics, food industry, as well as in agricultural production during the transportation of seed grain materials. The theoretical substantiation of the increase of efficiency of bulk cargoes transportation by screw conveyors is given in this paper. The problem of their progressive structures development with the possibility of minimal damage of grain materials remains important. The paper presents Recommendations for the auger rotation speed selection in order to minimize the damage of brittle elements and products are presented in this paper. The rational angle at which productivity of the screw conveyor reaches its maximum values is deteermined.

scholarly journals Design development and study of an elastic sectional screw operating tool

2021 ◽  
Vol 61 (5) ◽  
pp. 624-632
Author(s):  
Roman Hevko ◽  
Sergii Zalutskyi ◽  
Ihor Tkachenko ◽  
Oleg Lyashuk ◽  
Oleksandra Trokhaniak
Keyword(s):  
Agricultural Production ◽  
Bulk Material ◽  
Response Surfaces ◽  
Tool Development ◽  
Design Development ◽  
Power Capacity ◽  
Technological Parameters ◽  
Peripheral Part ◽  
Damage Rate ◽  
Minimal Damage

The results of an elastic sectional screw operating tool development and its production technique are presented in the article under consideration. The operating tool has been made to fix the elastic sections, providing the transportation of bulk materials of agricultural production, in order to ensure their minimal damage and the process minimal power capacity. The article presents constructed regression dependencies and response surfaces for the effects of the design, kinematic and technological parameters of a sectional screw operating tool on power consumption and the damage rate of grain material in the process of its transportation. As the result of the conducted experimental research, authors came to a conclusion that the arrangement of an elastic auger without a gap between its peripheral part and the inner surface of the guiding tube significantly reduces vibrations in the process of conveying bulk material.

scholarly journals Blade Tip-timing Technology with Multiple Reference Phases for Online Monitoring of High-speed Blades under Variable-speed Operation

2018 ◽  
Vol 18 (6) ◽  
pp. 243-250 ◽  
Author(s):  
Zhang Ji-wang ◽  
Zhang Lai-bin ◽  
Ding Ke-Qin ◽  
Duan Li-xiang
Keyword(s):  
High Speed ◽  
Online Monitoring ◽  
Rotation Speed ◽  
Experimental Tests ◽  
Reference Points ◽  
Variable Speed ◽  
Rotating Shaft ◽  
Virtual Reference ◽  
Blade Tip ◽  
Multiple Reference

Abstract High-speed blades form core mechanical components in turbomachines. Research concerning online monitoring of operating states of such blades has drawn increased attention in recent years. To this end, various methods have been devised, of which, the blade tip-timing (BTT) technique is considered the most promising. However, the traditional BTT method is only suitable for constant-speed operations. But in practice, the rotational speed of turbomachine blades is constantly changing under the influence of external factors, which lead to unacceptable errors in measurement. To tackle this problem, a new BTT method based on multi-phases is proposed. A plurality of phases was arranged as evenly as possible on the rotating shaft to determine the rotation speed. Meanwhile, the corresponding virtual reference point was determined in accordance with the number of blades between consecutive phases. Based on these reference points, equations to measure displacement due to blade vibrations were deduced. Finally, mathematical modeling, numerical simulation and experimental tests were performed to verify the validity of the proposed method. Results demonstrate that the error in measurement induced when using the proposed method is less than 1.8 %, which is much lower compared to traditional methods utilized under variable-speed operation.

Methodological Approaches to the Formation of the Soil Abrasive Characteristics and Wear of Tillage Machine

2021 ◽  
Vol 2 (43) ◽  
pp. 78-83
Author(s):  
Anatoliy T. Lebedev ◽  
◽  
Viktor V. Ochinskiy ◽  
Yuriy I. Zhevora ◽  
Ramil’ R. Iskenderov ◽  
...  
Keyword(s):  
Dynamic Characteristics ◽  
Crop Production ◽  
Research Purpose ◽  
Numerical Characteristic ◽  
Theoretical Substantiation ◽  
Methodological Approaches ◽  
Working Bodies ◽  
The Cost ◽  
Abrasive Ability ◽  
Moving Speed

When performing various technological operations in crop production, the working bodies of tillage equipment in contact with the soil wear out under the influence of an abrasive environment. (Research purpose) The research purpose is in theoretical substantiation for a method for quantifying the wear capacity of soils with different abrasive characteristics. (Materials and methods) The article presents the evaluation of the abrasive ability of the soil by the wear of a steel rod vertically immersed in the soil and moving translationally. Authors used the standard rod of steel St0; geometric parameters of the worn rod are diameter d = 25-30 millimeters, height h = 250 millimeters; dynamic characteristics during the test are moving speed V = 3 kilometers per hour, distance of movement L = 100 meters. The worn rod sinks to a certain depth, moves in the soil at a constant speed. A device was used to determine the abrasive characteristics of the soil. (Results and discussion) The numerical characteristic of the wear capacity of the soil was determined as the physical value of the wear of the standard worn rod when moving in the soil as A=Q/L, grams per meter. The lower the value of this ratio, the less abrasive components are in the soil; based on the wear data of a standard rod, it is possible to obtain a characteristic of the wear capacity of various soils. (Conclusions) The proposed method allows us to determine the abrasive and wear characteristics of various types of soils. The results of the study make it possible to install working bodies on tillage machines in accordance with the type and wear capacity of the soil in which they will work, which will reduce the cost of their manufacture and increase the efficiency of the use of equipment.

scholarly journals Modern problems of the product market of Russia

2020 ◽  
Vol 164 ◽  
pp. 09034 ◽  
Author(s):  
Tat’ayna Gorokhova ◽  
Lyudmila Pushkareva ◽  
Mikhail Pushkarev
Keyword(s):  
Agricultural Production ◽  
Food Industry ◽  
Product Market ◽  
Transnational Corporations ◽  
Economic Security ◽  
Economic Life ◽  
Significant Part ◽  
Development Trends ◽  
Economic Trends ◽  
Food Market

Modern transformations in the economic life of society impose requirements on the reassessment of existing economic trends from the standpoint of the country’s economic security. In many regions of the country, the situation on the food market is far from ideal. A significant part of the food industry is controlled by transnational corporations, and modern own agricultural production does not cover the needs of the population for significant food products. This article reveals the development trends of the domestic food market. Particular attention is paid to the development of grain farming and the formation of the bread market.

scholarly journals Soil tillage energy efficiency increase

2020 ◽  
Vol 17 ◽  
pp. 00177
Author(s):  
Alexander Petrov ◽  
Yuri Saveliev ◽  
Pavel Ishkin ◽  
Mikhail Petrov
Keyword(s):  
Energy Efficiency ◽  
Agricultural Production ◽  
Soil Tillage ◽  
Traction Drive ◽  
Soil Cultivation ◽  
Efficiency Increase ◽  
Working Bodies

Tillage energy efficiency increase is one of the important tasks in improving the profitability and sustainability of agricultural production. The paper proposes to increase cultivation energy efficiency due to the use of traction-drive tilling implement with active working bodies, not creating a high traction resistance and not requiring a large towing weight of aggregated tractor. The analysis of the energy efficiency of soil cultivation using traction-driven tilling implements with active working bodies has been carried out, and theoretical dependences of the coefficient of efficiency of a traction-driven machine-tractor unit has been obtained. The possibility of increasing the efficiency of the unit by reducing slipping of the tractor wheels and losses on rolling of the unit has been determined, which has been achieved by transferring part of the power through the power take-off shaft (PTO) of tractor to the drive working bodies of tilling implement, which compensate for traction resistance of the implement and create a pushing force, reducing the resistance to rolling.

scholarly journals Dél-Dunántúl agrárgazdaságának helyzetképe, lehetőségei

2012 ◽  
Vol 7 (1-2) ◽  
pp. 146-152
Author(s):  
Erika Weber
Keyword(s):  
Statistical Analysis ◽  
Sugar Beet ◽  
Agricultural Production ◽  
Food Industry ◽  
Agricultural Sector ◽  
Red Wine ◽  
Is Integration

Basis of my research is the Southern Transdanubian Region. The statistical analysis showed that output, commensurable to the region's territory, can be performed only by the agricultural production. The Southern Transdanubia is the most important producer of corn and cereals, as well as in growth of sugar beet and soya in the country, and it has prominent role in growth of sunflower and rape, as well as in producing qualitative red wine. The significance of the agricultural sector is shown by the fact that despite the decrease of the food sector's importance, the food industry is the largest sector beside the energetics industry in the region. However, the competitiveness of the sector is not adequate, increase of which is essential from the aspect of the industry. One of the instruments is integration of the small growers.

scholarly journals Bio Discarded from Waste to Resource

Foods ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2652
Author(s):  
Irene Dini
Keyword(s):  
Agricultural Production ◽  
Food Industry ◽  
Agricultural Waste ◽  
Food Additives ◽  
Value Added ◽  
Waste Reduction ◽  
Bioactive Molecules ◽  
Social Benefits ◽  
Production Chain ◽  
Value Added Products

The modern linear agricultural production system allows the production of large quantities of food for an ever-growing population. However, it leads to large quantities of agricultural waste either being disposed of or treated for the purpose of reintroduction into the production chain with a new use. Various approaches in food waste management were explored to achieve social benefits and applications. The extraction of natural bioactive molecules (such as fibers and antioxidants) through innovative technologies represents a means of obtaining value-added products and an excellent measure to reduce the environmental impact. Cosmetic, pharmaceutical, and nutraceutical industries can use natural bioactive molecules as supplements and the food industry as feed and food additives. The bioactivities of phytochemicals contained in biowaste, their potential economic impact, and analytical procedures that allow their recovery are summarized in this study. Our results showed that although the recovery of bioactive molecules represents a sustainable means of achieving both waste reduction and resource utilization, further research is needed to optimize the valuable process for industrial-scale recovery.

Indicators of Agri-Food Sectors of Serbia

2017 ◽  
pp. 37-58
Keyword(s):  
Agricultural Production ◽  
Food Industry ◽  
Production Capacity ◽  
Foreign Market ◽  
Practical Significance ◽  
Food Sector ◽  
Productivity Level ◽  
The Status ◽  
Agricultural Areas ◽  
Agriculture And Food

The second chapter represents an analysis of agri-food sector indicator of Serbia. The authors were aiming to show how the analysed indicators have an effect on the export of agri-food products. After reading this chapter, readers will be familiar with the structure of agricultural production and the status of natural resources in Serbia. They will understand that the results of overall analysis have a practical significance, as well as that by the rational use of comparative and competitive advantage dynamizes the export of agriculture and food industry of Serbia on foreign market. They will be able to notice the connection between the unfavourable structure of agricultural production and the structure of agricultural areas. Readers will comprehend the impact of number and size of agricultural holdings on the productivity level and the price competitiveness of products. They will perceive types of land in Serbia according to land capability classification and will know about the quality of soil, water, air and forest potential. They will be able to understand a limiting role of age and educational level of human resources in agriculture. Readers will be familiar with the degree of utilization of production capacity in food industry. They will be familiar with suggestions for the improvement of agri-food sector from different points of view, and also will perceive room for deepening research as scientists, as well as educators, creators, politicians and strategists.

Development chiseling of soil-cultivating tools and their theoretical substantiation

2021 ◽  
pp. 12-19
Author(s):  
I. B. Borisenko ◽  
V. I. Pyndak ◽  
A. E. Novikov
Keyword(s):  
Theoretical Substantiation ◽  
Working Bodies

In work modern lines in development of system of agriculture and soil-cultivating tools on base chiseling working bodies, possibility of their application and advantage are resulted. The theoretical substantiation chiseling tools is given.

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