scholarly journals The spreading model of the material in the working chamber of the batch grinder

2019 ◽  
pp. 107-112
Author(s):  
Bratishko, V. ◽  
Rebenko, V. ◽  
Milko, D. ◽  
Khmelovska, A.
Keyword(s):  
Mathematical Model ◽  
Steady State ◽  
Bulk Material ◽  
Experimental Studies ◽  
Physical And Mechanical Properties ◽  
Raw Material ◽  
Surface Shape ◽  
Technological Parameters ◽  
Working Chamber ◽  
General Terms

Purpose. Set the nature of the distribution of bulk material in the working chamber of a batch grinder with a steady state of its operation. Methods. Theoretical principles of classical mechanics, mechanics of liquids and gases. Results. A general mathematical model of the material distribution in the chamber batch grinder is obtained. This model allows determining the height of the material layer at an each point in the working chamber of the batch grinder at a certain distance from the axis rotation of the working bodies and interconnects the physical and mechanical properties of the crushed raw material, technological parameters of the grinder and its mode of operation. The character of the obtained model indicates that it corresponds to the well-established ideas about the distribution of loose media in the working chamber of the batch grinder. Conclusions. As a result of theoretical studies, a mathematical model of the distribution of bulk material in a cylindrical working chamber of a batch grinder with a steady state of operation was obtained in general terms. Assumptions made in the course of research prove the feasibility of conducting experimental studies to verify the adequacy and refinement of the model. Keywords: grinding, bulk material, batch grinder, character of distribution, surface shape.

Modeling of Bulk Material Loading Into Sieve of the Scissor-type Separator

2020 ◽  
pp. 59-68
Author(s):  
Іgor Dudarev ◽  
◽  
Vasyl Olkhovskyi ◽  
Keyword(s):  
Mathematical Model ◽  
Raw Materials ◽  
Bulk Material ◽  
Physical And Mechanical Properties ◽  
Raw Material ◽  
Entire Surface ◽  
Feed Production ◽  
Favorable Conditions ◽  
Oscillating Motion ◽  
The Mathematical Model

In agriculture and feed production, seeds and grains of various crops that require cleaning and separation are used as sowing material and raw materials. For seed and grain cleaning and separation the separators of different type are used. During operation, these separators take into account the physical and mechanical properties of the raw material. The article proposes the design of bulk material separator of scissor type, which has small dimensions and is easy to maintain. The efficiency of separator depends on the uniformity of the bulk material loading on the sieve surface. Therefore, substantiation of rational parameters of separator is an extremely important task. So, the aim of the study is to model the loading process of bulk material from the unloading hole of the hopper on an inclined flat sieve of the scissor-type separator, which performs oscillating motion. The proposed mathematical model of the bulk material loading from the hopper to the separator sieve allows us to determine the trajectory of the particle falling and to describe the position of the sieve, which changes due to the rotation of the eccentric. Also, modeling allows us to justify the rational parameters of the separator, taking into account the kinematic mode of its operation. Under these parameters, a layer of material of the same height will be formed on the sieve, which will provide favorable conditions for the separation process. In addition, the mathematical model allows us to determine the rational parameters of the relative position of the hopper and the sieve. In this case the entire surface of the sieve is used effectively.

scholarly journals RESEARCH OF THE OF BULK MATERIAL MOVEMENT PROCESS IN THE INACTIVE ZONE BETWEEN SCREW SECTIONS

2020 ◽  
Vol 60 (1) ◽  
pp. 261-268
Author(s):  
O.M. Trokhaniak ◽  
R.B. Hevko ◽  
O.L. Lyashuk ◽  
T.A. Dovbush ◽  
B.V. Pohrishchuk ◽  
...  
Keyword(s):  
Optimal Design ◽  
Bulk Material ◽  
Experimental Studies ◽  
Screw Conveyor ◽  
Technological Parameters ◽  
Movement Process ◽  
Curved Paths ◽  
Agricultural Materials

The article presents the results of theoretical and experimental studies of the process of moving bulk material in the inactive zone between hinged screw sections of a flexible screw conveyor. The influence of the gap between the edges of adjacent screw sections and the magnitude of their circular displacement on the process of continuous transportation of bulk material is presented. The results of theoretical and experimental studies are compared. This will allow choosing the optimal design, kinematic and technological parameters of the developed sectional screw working body when transporting bulk agricultural materials along curved paths, both in horizontal and inclined directions, as well as along curved paths.

scholarly journals RESEARCH OF PHYSICAL AND MECHANICAL PROPERTIES OF WOOD-FIBER MATERIALS

2020 ◽  
pp. 451-457
Author(s):  
Aleksandr Yur'yevich Vititnev ◽  
Yuriy Davydovich Alashkevich ◽  
Natal'ya Geral'dovna Chistova ◽  
Roman Aleksandrovich Marchenko ◽  
Venera Nurullovna Matygullina
Keyword(s):  
Mechanical Properties ◽  
Wood Fiber ◽  
Experimental Studies ◽  
Physical And Mechanical Properties ◽  
Production Method ◽  
Strength Properties ◽  
Grinding Process ◽  
Technological Parameters ◽  
Fiber Materials ◽  
Traditional Construction

This paper presents the results of experimental studies of the physical and mechanical properties of wood-fiber boards of the wet production method when regulating the design and technological parameters of the grinding process. This allowed us to determine the influence of the working clearance between the grinding discs and the concentration of fibre mass with the subject to of quality change wood fiber after defibrator using the developed construction of the disc fibrillation action on the physico-mechanical properties of boards. As a result of the experiment, regression models were obtained that adequately describe the studied grinding process and allow predicting the values of physical and mechanical properties of the finished product depending on the established  parameters process. A comparative analysis of the size and quality characteristics of the fiber semi-finished product and its fractional composition when using a developed construction the disc of refiner fibrillation action and a traditional design used in industry is carried out. The preferential efficiency of the grinding process under the fibrillating effect the disc of refiner in comparison with the traditional construction disc of refiner is established. As a result, there is a significant improvement in the quality indicators of the fiber semi-finished product and its composition due to the formation and predominance in the total mass of long and thin, respectively, flexible fibrillated fibers with high tile-forming properties, which allows to increase the strength properties of the product (by 20–25%), without using binding resins.

scholarly journals Physical and mathematical modeling of the moving the raw cotton between directing wall and area ginning seeds

2021 ◽  
Vol 2131 (3) ◽  
pp. 032056
Author(s):  
M Ahmedov ◽  
M Shoraxmedova ◽  
T Tuychiev ◽  
D Tashpulatov ◽  
I Cherunova
Keyword(s):  
Mathematical Modeling ◽  
Cotton Fiber ◽  
Quantitative Estimation ◽  
Experimental Studies ◽  
Raw Material ◽  
Direct Impact ◽  
Actual Problem ◽  
Working Chamber ◽  
Qualitative And Quantitative ◽  
Physical And Mathematical Modeling

Abstract In article are brought algorithm and results brought numerically-experimental studies on qualitative and quantitative estimation of the law of the moving the raw cotton from directing walls outgoing between spiked-drum and netlike surface feeder aside worker of the camera ginning machines. It is known that the uniform supply of raw cotton to the ginning process has a direct impact on the efficiency of the ginning process. In the process of ginning, the cotton is cleaned on the surface of the pile drum and net of the supplier, and the crushed gin comes to the working chamber through the gin. As a result of the rotation of the saw cylinder in the working chamber, the cotton fiber is suspended and the rotation is started. As a result of the circular motion of the raw cotton, a raw material roller is formed. In this process, the actual problem is to ensure that the raw cotton consists of small pieces and is uniform in time and width of the equipment. The Comparison got given on calculation shows that increase the corner will bring about increase the growing forming displacement. Increase of this corner will bring the leaflet of the raw cotton about increase of length free moving.

scholarly journals THE STUDY OF THE METHOD OF FIGHT AGAINST FORMATION OF POLARIZING LAYER AT THE PROCESS OF ULTRAFILTRATION CONCENTRATION OF THE SKIM MILK

2016 ◽  
Vol 5 ◽  
pp. 53-60
Author(s):  
Grygoriy Deynychenko ◽  
Vasyl Guzenko ◽  
Oleg Udovenko ◽  
Aleksandr Omelchenko ◽  
Olga Melnik
Keyword(s):  
Mathematical Models ◽  
Membrane Surface ◽  
Experimental Studies ◽  
Skim Milk ◽  
Factorial Experiment ◽  
Raw Material ◽  
Technological Parameters ◽  
Membrane Processing ◽  
Working Parameters ◽  
Selection Of

The description of experimental set and the method of processing of the results of the study of the method of fight against formation of polarizing layer in the process of ultrafiltration concentration of skim milk raw material were presented. The results of experimental studies relative to the sparging method application for the prevention of polarizing layer in the process of membrane processing of the skim milk and its influence on the capacity of ultrafiltration membranes were offered. The mathematical models were constructed on the base of regressive equations of factorial experiment using the method of the raw material sparging above the membrane surface for selection of technological parameters of the process of ultrafiltration concentration of the skim milk. The rational working parameters of the process of ultrafiltration concentration of the skim milk using the sparging of the skim milk by the gas bubbles in the direct closeness to the membrane surface were determined. Such working parameters are: pressure– 0,4...0,5 MPa, temperature of skim milk– 40...50 ºС, frequency of sparging of skim milk– 0,10...0,15 min-1, pressure of sparging must be 0,56...0,58 MPa.

scholarly journals INVESTIGATION OF THE NEUTRALIZATION PROCESS OF SULFATION PRODUCTS IN THE SURFACTANTS PRODUCTION

2021 ◽  
pp. 3-8
Author(s):  
Oleksandr Dzevochko ◽  
Mykhaylo Podustov ◽  
Ihor Lysachenko ◽  
Alona Dzevochko ◽  
Roman Vorozhbiian
Keyword(s):  
Mathematical Model ◽  
Heat Exchanger ◽  
Exothermic Reaction ◽  
Experimental Studies ◽  
High Heat ◽  
Technological Parameters ◽  
Continuous Action ◽  
Positive Effects ◽  
Neutralization Process ◽  
Turbine Mixer

The process of sulfation products neutralization in the production of surfactants is not basic, but at this stage the positive effects obtained at the stage of sulfation of organic matter with sulfur trioxide gas are fixed. To preserve the degree of sulfation obtained, it is necessary to carry out the neutralization process under conditions precluding the occurrence of hydrolysis in an acidic medium. The neutralization reaction takes place with a high heat release of about 40 kJ / mol. Analysis of the literature data showed that the neutralization process is not well covered. Little data and hardware and technological design of the process. The process of neutralization in industrial conditions is carried out in apparatus with mechanical turbine mixers, to remove the heat of the exothermic reaction, the paste from the neutralizer is fed into a water-borne heat exchanger and returns to the neutralizer again. The purpose of this study is to determine the optimal technological parameters of the process of neutralization of sulfate products and the development of a mathematical model of this process. The results of experimental studies of the process of sulfation products neutralization with an aqueous solution of sodium hydroxide are presented. During the research, the influence of technological parameters on the quality indicators of neutralization products was determined, the main of which is the degree of sulfation. The optimal technological parameters for carrying out this process in a reactor with a stirrer under laboratory conditions were found. Based on the data obtained in the basis of this process, the use of a continuous-action reactor with a turbine mixer and with a combined heat exchanger. For the transition to an industrial reactor-neutralizer, a mathematical model has been developed, which makes it possible, by means of mathematical modeling, to correct technological parameters in industrial conditions.

scholarly journals Optimal parameters of physical and mechanical properties of sawdust concrete

2021 ◽  
Vol 244 ◽  
pp. 04007
Author(s):  
Nikolay Plotnikov ◽  
Olga Burova
Keyword(s):  
Mechanical Properties ◽  
Mathematical Model ◽  
Mechanical Characteristics ◽  
Experimental Studies ◽  
Physical And Mechanical Properties ◽  
Optimal Parameters ◽  
Coniferous Species ◽  
Variable Factor ◽  
Object Of Study ◽  
The Impact

The purpose of the conducted experimental studies is to examine the effect of various influences on the object of study. These effects are called factors. Some of them vary while examining of the object and then they are called variable factors. Each factor takes one or more values in the experiment and then they are called factor levels. The set of values of this factor is called range of factor values – the smallest interval, where are all the values accepted by this factor in the experiment. According to GOST 19222-84, the dependence of the physical-mechanical characteristics of sawdust slag concrete (grade M10) on the specific gravity (share) of wet sawdust of coniferous species and ash-slag mixture in the composition was studied. Regression analysis was used to build a mathematical model of the process with quantitative factors, to verify its adequacy, and to assess the impact of each variable factor on the process. To obtain regression dependencies, a composite second-order B-plan was implemented.

scholarly journals ДОСЛІДЖЕННЯ ЕНЕРГОВИТРАТ ТАРІЛЧАСТИХ ЖИВИЛЬНИКІВ ДЛЯ СИПКИХ МАТЕРІАЛІВ

2021 ◽  
Vol 148 (4) ◽  
pp. 67-76
Author(s):  
О. П. Бурмістенков ◽  
Т. Я. Біла ◽  
В. В. Стаценко
Keyword(s):  
Mechanical Properties ◽  
Mathematical Models ◽  
Rotation Speed ◽  
Bulk Material ◽  
Physical And Mechanical Properties ◽  
Technological Parameters ◽  
Plate Rotation ◽  
Plate Feeder ◽  
The Relationship ◽  
Continuous Plate

Creation  of  mathematical  models  that  allow  determining  the  relationship  between  the design and technological parameters of the plate feeders and the energy consumption arising during their operation. Methodology.  The  work  uses  the  classical  mechanics  principles,  the  contact  interaction  of  solids theory and the mathematical modeling method. Findings.  The  paper  considers  the  design  and  operation  principle  of  a  continuous  plate  feeder, defines its main design and technological parameters. The factors that create mechanical loads on the drive of  the  feeder  plate  are  investigated.  Mathematical  models  have  been  developed  that  make  it  possible  to determine the moments of resistance and the power consumed by an electric motor during the equipment operation. The proposed models make it possible to determine the load on the drive in static and dynamic operation modes and take into account the design, technological parameters of the equipment and the bulk material physical and mechanical properties. The study results of the friction coefficients influence, the knife position and the force of its pressing on the plate surface, the plate rotation speed on the loads acting on the electric drive are presented. It has been found that the drive calculation is expedient for the mode in which the distance between the knife edge and the rotation axis of the plate is maximum, which corresponds to the operation at maximum load. It has been determined that a change in the feeder technological parameters (plate rotation speed, knife position) can lead to a change in the load on the electric drive by 86%, which must be taken into account when choosing a drive. Originality.  Mathematical  models  of  the  continuous  plate  feeder  operation  have  been  developed, which make it possible to determine the relationship between the design and technological parameters of the plate feeders and energy consumption. Practical value. The results obtained make it possible to determine the load on the plate drive by the known design, technological parameters and bulk material physical and mechanical properties.

Reduced dust generation when loading hoppers with powdered material. Part 2. Results of numerical-experimental studies

2021 ◽  
pp. 64-71
Author(s):  
A. S. Seminenko ◽  
K. I. Logachev ◽  
A. V. Goltsov ◽  
O. A. Averkova
Keyword(s):  
Rational Design ◽  
Bulk Material ◽  
Experimental Studies ◽  
Powdered Material ◽  
Coanda Effect ◽  
Dust Formation ◽  
Technological Parameters ◽  
Dust Generation ◽  
Material Part ◽  
Coandǎ Effect

On the basis of the obtained analytical dependencies, the expediency of fan loading of bunkers with powdery bulk material has been proved. The design of an annular charging device, which reduces dust formation, using the Coanda effect is proposed. The rational design and technological parameters of the developed device are numerically and experimentally determined.

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