scholarly journals Study On Parameters and Operating Modes of the Device for Deseeding Flax in the Field

2021 ◽  
Vol 15 (2) ◽  
pp. 13-18
Author(s):  
V. G. Chernikov ◽  
R. A. Rostovtsev ◽  
S. V. Solov’ev
Keyword(s):  
Mechanical Properties ◽  
Technological Process ◽  
Physical And Mechanical Properties ◽  
Experimental Plant ◽  
Fiber Flax ◽  
Theoretical Substantiation ◽  
Operating Modes ◽  
Harvesting Process ◽  
Flax Seeds ◽  
The Cost

The authors showed that the main technological process in the combined and separate methods of fiber flax harvesting is deseeding or separating the seed part of the crop from the stems. It was confirmed that there is a direct impact of this process success on seed and straw losses, the fiber yield and quality, the heap composition, the labor intensity and energy consumption of flax drying and processing. (Research purpose) To develop a technology for stripping fiber flax with a comb deseeder during harvesting, to study the deseeder’s specifications and operating modes. (Materials and methods) The authors studied the technological process of stripping flax with a comb deseeder. An experimental plant of a comb deseeder was designed. A model of theoretical calculation was proposed based on the physical and mechanical properties of fiber flax and agrotechnical requirements for its harvesting. (Results and discussion) The authors theoretically determined the comb deseeder’s optimal height, operation kinematic mode, stripping cleanliness, the radius of the stripper drum. Laboratory studies were conducted. It was shown that threshing seeds in the field will reduce the loss of flax seeds by 10 per cent and the stem waste due to tangling during the harvesting process – by 18 per cent. It will also reduce the number of harvesting vehicles, personnel, and the cost of product. The authors identified an opportunity to increase productivity by increasing the width of the header grip: for example, the width of a grain harvester header is about 4 meters, and the width of a flax harvester header is 1.52 meters, that is, the productivity of flax harvesting will increase 2.6 times at the same speed, and 3 times at a higher speed. It was possible to eliminate one piece of equipment – a heap separating machine, since the technological operation of heap processing is carried out by a grain harvester. (Conclusions) The authors presented a theoretical substantiation of the comb deseeder’s operating parameters and modes for stripping fiber flax in the field. The authors proposed a model to determine them based on the physical and mechanical properties of flax and agrotechnical requirements for its harvesting.

scholarly journals Influence of magnesium hydrosilicate on the properties plantar rubber

2020 ◽  
Vol 61 (1) ◽  
pp. 91-95
Author(s):  
Konstantin V. Efimov ◽  
◽  
Lyudmila Yu. Tsareva ◽  
Nikolay F. Ushmarin ◽  
Nikolay I. Koltsov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Practical Interest ◽  
Physical And Mechanical Properties ◽  
Rubber Mixture ◽  
Rubber Compounds ◽  
Developed Surface ◽  
The Cost ◽  
Methyl Styrene ◽  
Styrene Butadiene

The properties of rubber products are determined by the nature and content of caoutchoucs, vulcanizing systems and other ingredients. Among them, fillers play an important role. The most common fillers are carbon black and silicas. Recently, in connection with the increasing operational requirements for rubber products, additives of special fillers began to be introduced into rubber mixtures. Among them, silicates are of practical interest, the use of which allows not only to reduce the cost, but also to give qualitatively new useful physical and mechanical properties to rubbers. Improving the physical and mechanical properties of rubbers directly depends on the particle size of the fillers. Fillers with a smaller particle size have a larger surface area and have a significant effect on the physical and mechanical properties of rubbers. The highly developed surface of powdered magnesium hydrosilicate suggests its use as a filler for rubber compounds. In this regard, it is of interest to study the effect of magnesium hydrosilicate on the properties of rubbers. This article explored the possibility of using magnesium hydrosilicate in plantar rubber based on a combination of nitrile butadiene SKN-4055, methyl styrene butadiene SKMS-30ARK and isoprene SKI-3 caoutchoucs. The rheometric properties were investigated for the rubber mixture, and the physical and mechanical properties, hardness, resistance to thermal aging and the action of aggressive media were determined for vulcanizates. As a result of the studies, it was found that the best rheometric, physico-mechanical and operational properties are possessed by the vulcanizate of the rubber compound, in which the silicon-acid filler of rossil 175 was partially replaced by magnesium hydrosilicate. This rubber can be used in the production of oil and petrol resistant soles of rubber shoes.

scholarly journals Formaldehyde Use and Alternative Biobased Binders for Particleboard Formulation: A Review

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Stephen Warui Kariuki ◽  
Jackson Wachira ◽  
Millien Kawira ◽  
Genson Murithi
Keyword(s):  
Mechanical Properties ◽  
Modulus Of Elasticity ◽  
Health Hazard ◽  
Physical And Mechanical Properties ◽  
Epidemiologic Studies ◽  
Modulus Of Rupture ◽  
Modified Starch ◽  
Internal Bonding ◽  
The Cost ◽  
Over Time

Formaldehyde-based resins are conventionally used as a binder in formulation of particleboard. Epidemiologic studies have shown that formaldehyde is carcinogenic. Efforts to reduce the health hazard effects of the fomaldehyde-based resin in the particleboard formulation have included use of scavengers for formaldehydes and use of an alternative binder. Use of scavengers for the formaldehyde increases the cost and maintenance of particleboard formulation. There is no proof that scavengers eliminate the emission of formaldehyde from particleboard. Use of biobased binders in particleboard formulation provides an alternative for eliminating use of the formaldehyde-based resin. However, the alternative is hindered by challenges, which include limitations of physical and mechanical properties. The challenge has continuously been acted upon through research. The paper presents an overview of the use of starch as an alternative binder. Improvement over time of the starch and limitations thereof requires to be addressed. Use of the modified starch has shown increased particleboard performance. Mechanical strength, such as modulus of rupture, modulus of elasticity, and internal bonding in particleboards, however, remains to be a challenge.

scholarly journals Theoretical Substantiation of the Angle of Mounting a Flat Ridge-Forming Disc of a Row Crop Cultivator

2021 ◽  
Vol 346 ◽  
pp. 03102
Author(s):  
Evgeny Zykin ◽  
Vladimir Kurdyumov ◽  
Svetlana Lazutkina
Keyword(s):  
Mechanical Properties ◽  
Angle Of Attack ◽  
Soil Layer ◽  
Physical And Mechanical Properties ◽  
Acute Angle ◽  
High Quality ◽  
Crop Cultivation ◽  
Theoretical Substantiation ◽  
Lower Base ◽  
Row Crop

The authors have developed a row-crop cultivator equipped with a ridge former, which allows performing high-quality operations of row crop cultivation in one pass. The inter row cultivation is carried out with a row-crop cultivator, on each section of which two ridge formers are mounted so that their flat discs are directed towards the row of plants at an acute angle, and the extreme edges of the wings of the V-shaped sweeps are located at the lower base of the soil ridge. When the row-crop cultivator moves, the V-shaped sweeps loosen the soil to the required depth and cut the weeds, and the flat discs move the soil layer coming off the wings of the V-shaped sweeps towards the rows of plants, hilling them and burying the weeds. In the presented article, the authors theoretically substantiate the angle of attack of a flat disc for burying weeds with a layer of soil of the required thickness. It was found that the angle of attack depends on the radius of the flat disc and the depth of its movement in the soil, the initial dimensions of the ridge and the physical and mechanical properties of the soil.

scholarly journals Mutual spectral densities calculation of the moments of resistance on the peat milling unit working bodies

2021 ◽  
Vol 251 ◽  
pp. 745-756
Author(s):  
Konstantin Fomin
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Structural Heterogeneity ◽  
Movement Speed ◽  
Spectral Densities ◽  
Engine Operation ◽  
Operating Modes ◽  
Random Forces ◽  
Variable Nature ◽  
Working Bodies

When performing technological operations in the peat industry, various units with milling-type working bodies are used. They differ in design, layout, number and type of cutting elements, operating modes, and may have one or more working bodies. During operation, random forces and moments act on the cutters, which have a dramatically variable nature, which is associated with the periodic interaction of the knives with the peat deposit, its structural heterogeneity, variations in the milling depth, physical and mechanical properties of peat, the rotational speed of the cutter and the movement speed of the machine. In this case, significant dynamic loads arise in the structural elements, which leads to a decrease in their reliability, deterioration of the energy characteristics of the engine operation and technical and economic indicators of use. In the dynamic analysis of drive elements, when using machines with several working bodies, it is necessary to know both spectral and mutual spectral load densities.  For their calculation, expressions were obtained that take into account the physical and mechanical properties of peat, the operating modes of the unit and their probabilistic characteristics, as well as the design features of the working body. The expressions are obtained for the case when there are several working bodies with the same diameters and the number of knives in the cutting plane. In this case, the number of planes, width, type of cutting element and type of cutting (locked, semi-locked, etc.) may differ. As an example of using the developed approaches, the calculation of spectral and mutual spectral densities of moments on cutters and loads in the drive elements of the machine for surface-layer milling MTF-14 is presented.

Structural Conformation of Polytetrafluoroethylene Composite Matrix

2016 ◽  
Vol 10 (2) ◽  
pp. 241-246 ◽  
Author(s):  
Oleg Budnik ◽  
◽  
Anatoliy Budnik ◽  
Valentin Sviderskiy ◽  
Kristina Berladir ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Activation ◽  
Supramolecular Structure ◽  
Physical And Mechanical Properties ◽  
Composite Matrix ◽  
Service Properties ◽  
Operating Modes ◽  
Structural Conformation ◽  
First Time

Enhancement of physical and mechanical properties and structuring activity of polytetrafluoroethylene as matrix of composites by means of mechanical activation is shown. Operating modes of mechanical activation equipment are defined, in which the service properties of PTFE are maximized. The effect of mechanical activation technology on restructuring and change of morphology and supramolecular structure of PTFE is detected for the first time.

Features of Formation of Structure and Physical and Mechanical Properties of Permanent Welded Joints of Low-Alloy Steels by Methods of Adaptive Pulse Control of Energy Parameters of Welding Mode

2018 ◽  
Vol 938 ◽  
pp. 124-131
Author(s):  
Y.N. Saraev ◽  
S.V. Gladkovsky ◽  
A.G. Lunev ◽  
M.V. Perovskaya ◽  
V.M. Semenchuk
Keyword(s):  
Mechanical Properties ◽  
Technological Process ◽  
Welded Joints ◽  
Physical And Mechanical Properties ◽  
Dynamic Strength ◽  
Strength Properties ◽  
Low Alloy Steels ◽  
Dominant Effect ◽  
Energy Parameters ◽  
Alloy Steels

The features of the formation of the structure and physical and mechanical properties of all-in-one compounds of low-alloy steels are studied. It is shown that the quality and strength properties of permanent joints depend on the energy parameters of the technological process of their manufacture. The technological process is accompanied by melting, transfer and crystallization of the weld metal from the melt, which has a dominant effect on the structure, indicators of static and dynamic strength of welded joints. The ranges of welding modes that have the greatest impact on the structural and mechanical properties of the zone of permanent joints in the temperature range from +20 degrees to minus 60 degrees Celsius. The results of the research can be widely used in the practice of repair and installation works of structures of the Northern design, working in conditions of naturally low climatic temperatures.

scholarly journals РОЗРОБЛЕННЯ МОДИФІКОВАНОГО НАМЕТУ УСБ-56

2019 ◽  
Vol 134 (3) ◽  
pp. 73-78
Author(s):  
З. С. Сірко ◽  
Б. Й. Запталов ◽  
Є. А. Стариш ◽  
Д. П. Торчилевський ◽  
І. І. Котлярова
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Production Method ◽  
Water Repellent ◽  
Normative Documents ◽  
Linear Dimensions ◽  
The Cost ◽  
Selection Of

The  purpose  of  the  tent  modification  type  USB-56  is  improvements  its  exploitative characteristics and reduction the cost of its production. Method. During the study of the physical and mechanical properties of the fabric, techniques were used to determine linear dimensions, linear and surface densities, to determine the breaking characteristics during stretching of the fabric, to determine the hygroscopic and water repellent properties of the tissue. All of  the  previously  used  methods  are  from  the  normative  and  technical  documentations.  The  selection  of samples of tissue was carried out in accordance with the requirements of normative documents.

scholarly journals Semidirect Restorations in Multidisciplinary Treatment: Viable Option for Children and Teenagers

2015 ◽  
Vol 16 (4) ◽  
pp. 280-283 ◽  
Author(s):  
Mateus Rodrigues Tonetto ◽  
Milton Carlos Kuga ◽  
Fausto Frizzera ◽  
Matheus Coelho Bandeca ◽  
Shilpa H Bhandi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Social Interactions ◽  
Multidisciplinary Treatment ◽  
Physical And Mechanical Properties ◽  
Integrated Treatment ◽  
Limiting Factor ◽  
Viable Option ◽  
Fundamental Step ◽  
Restoration Success ◽  
The Cost

ABSTRACT Due to the esthetic necessity required nowadays, the multidisciplinar treatment became a fundamental step in the restoration success. When the patient exhibits dental agenesis of one or more elements, he can show difficulty in social interactions. The age of the patient is a limiting factor to esthetic procedures, however, it should be evaluated as a real indicative with each case. The utilization of semi-direct restorations is a viable option due the cost, esthetic and improvement of physical and mechanical properties. The purpose of this paper is to present a case detailing the confection and cementation of anterior semi-direct restorations aimed at an anatomic reestablishment associated with integrated treatment with periodontics and orthodontics. How to cite this article Tonetto MR, Frizzera F, da Silva MB, Bhandi SH, Kuga MC, Pereira KF, Pinzan-Vercelino CRM, Bandéca MC. Semidirect Restorations in Multidisciplinary Treatment: Viable Option for Children and Teenagers. J Contemp Dent Pract 2015;16(4):280-283.

scholarly journals ЕКОНОМІЧНА ЕФЕКТИВНІСТЬ ВИРОБНИЧОГО ВПРОВАДЖЕННЯ ТОРСІОННО-УДАРНОГО РОЗПУШУВАЧА ҐРУНТУ

2012 ◽  
pp. 168-171
Author(s):  
Л. Ф. Бабицький ◽  
В. В. Падалка ◽  
С. В. Ляшенко
Keyword(s):  
Mechanical Properties ◽  
Technological Process ◽  
Physical And Mechanical Properties

Обґрунтована необхідність застосування актив-них розпушувачів для покращання фізико-механічних властивостей ґрунту сільськогоспо-дарських угідь. Наведено результати розрахунківекономічної ефективності використання торсіон-но-ударного розпушувача ґрунту. Підтвердженоекономічну ефективність його виробничого впро-вадження. Експериментально доведено економіюпалива при виконанні технологічного процесубезвідвального обробітку ґрунту машинно-тракторним аґреґатом у складі МТЗ-80 + торсі-онно-ударний розпушувач ґрунту в порівнянні звідомим прототипом. The necessity of use of active soil cultivators forimprovement of physical and mechanical properties offarm lands has been proved. Results of calculation ofeconomic efficiency of use of a torsion and percussivesoil cultivator have been presented. Economic efficiencyof use of torsion and percussive soil cultivator has beenconfirmed. The economy of fuel has been experimentallyconfirmed in the technological process of non-turnaroundsoil tilling by the unit in structure MTZ-80 + a torsionand percussive soil cultivator in comparison with aknown prototype.

scholarly journals Determination of economically viable option of liquidation the consequences of external dump deformation

2021 ◽  
Vol 280 ◽  
pp. 08014
Author(s):  
Yevheniy Babets ◽  
Oleh Anisimov ◽  
Oleksandr Shustov ◽  
Vitalina Komirna ◽  
Iryna Melnikova
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Safety Factors ◽  
Viable Option ◽  
The Third ◽  
The Stability ◽  
The Cost ◽  
Technical And Economic Indicators ◽  
Processing Enterprise

The safety factors for different variants of operation development were obtained, on the basis of which the technical and economic indicators were established and the most expedient way of restoration of dump operations in conditions of the formed landslide was chosen. The solutions were proposed for the external dump No 2 of the Central Ore Mining and Processing Enterprise (COMPE), that allow to continue its future operation. When working in the conditions of the formed landslide, three variants of the further dump operation are modeled: the first one - with landslide removal and unloading of the upper dump horizons, the second one - without landslide removal and involvement of disturbed lands in land allotment, the third one - with the landslide loading. Based on the built sections of the dump and defined physical and mechanical properties, the stability factors were obtained for different options of the operation development, which made it possible to determine the appropriate option to eliminate the effects of the dump slide deformations. As a result of the calculations, the cost flows for each of the proposed options of the formation of the end contour of the dump No 2 are determined.

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