scholarly journals Modelling the effect of continuous mixer operating parameters on mixture quality

2020 ◽  
Vol 164 ◽  
pp. 08009
Author(s):  
Alexey Kaliganov ◽  
Vladimir Konovalov ◽  
Alexey Chupshev ◽  
Vyacheslav Teryushkov
Keyword(s):  
Regression Model ◽  
Research Methodology ◽  
Coefficient Of Variation ◽  
Experimental Studies ◽  
Rotation Frequency ◽  
Operating Parameters ◽  
Kinematic Parameters ◽  
Continuous Mixing ◽  
Working Element

The aim of the research was to obtain a regression model of the influence of some structural and kinematic parameters of a continuous mixer working element on the quality of the prepared mixture. The research methodology included the analysis of the design of the mixing unit and the identification of factors that could significantly affect the quality of the mixture. Later, on the basis of the experimental studies, the quality of the mixture at given values of factors was determined and a regression model was established. The developed functional diagram of a continuous mixing unit made it possible to establish factors that most intensively affected the quality of the prepared mixture. The obtained adequate regression model of the coefficient of variation of the content of the control component in the samples of the mixture indicated an improvement in the quality of the mixture with an increase in the frequency of rotation of the mixers and the number of the arms levels. In terms of quality indicators, a rotation frequency of about 1500 rpm was most preferable with a number of mixer levels of at least 5.

scholarly journals VIBRATION MODULATION CAUSES AT ROTATION FREQUENCY IN ROTARY MACHINES

Akustika ◽  
2019 ◽  
Vol 32 ◽  
pp. 151-157
Author(s):  
Sergey Alekseevich Rykov ◽  
Irina Kudryavtseva ◽  
Sergey Vladimirovich Rykov
Keyword(s):  
Mathematical Model ◽  
Experimental Studies ◽  
Rotation Frequency ◽  
Diagnostic Methods ◽  
Bearing Unit ◽  
Rotary Machines ◽  
The Mathematical Model

The results of theoretical and experimental studies of the modulation of vibrations of rotary machines have been presented at rotation frequency. It has been shown that at the rotation frequency, the possible causes of the origin of the “side” spectral discrete components are the presence of a clearance and friction in bearing units. On the basis of the data obtained in the mathematical model, the diagnostic methods of the quality of functioning the bearing unit of rotary mechanisms are proposed.

scholarly journals Troweling of Concrete Surfaces – Contemporary Methods

2019 ◽  
Author(s):  
Izabela Major ◽  
Jarosław Kalinowski
Keyword(s):  
Rotational Velocity ◽  
Simulation Method ◽  
Kinematic Parameters ◽  
Quantitative Parameter ◽  
Surface Machining ◽  
Working Element ◽  
Solid Disc ◽  
Analytical Formulas ◽  
Optimization Of Geometry

The paper presents an analysis of the process of troweling concrete surfaces using the disc power trowel machines. The quantitative parameter of the disc effect of the disc is its geometric efficiency Sg . The algorithm for calculation of geometric efficiency Sg by simulation method is presented. The analytical formulas for calculation of geometric efficiency Sg for the solid disc and the ring for uniform linear motion at constant rotational velocity are presented.The possibility of converting geometry of the working element to approximate geometry (in terms of geometric efficiency) with the form of concentric rings with center in the middle of the rotation of the disc is presented. The size of the ring was determined by a parameter called the filling factor w. This record allows to calculate the value of the geometric efficiency of the disc's effect by the analytical method as the sum of the geometric efficiency of all. The methodology of numerical calculation of the widths of overlapping of machining areas for neighboring disc tracks has been presented to ensure the highest homogeneity of machining. The adopted objective function to optimize the uniformity of machining is to minimize the index of standard deviation of the geometric efficiency εSg . The geometry of the real working elements most often used for troweling in the aspect of uniformity of machining was analyzed. The method of the optimization of geometry with the assumed kinematic parameters was indicated in order to obtain the best quality of surface machining.

scholarly journals Substantiation of the presence and parameters of seed guides in the openers, which increase the quality of sowing and yield

2021 ◽  
Vol 4 (1(112)) ◽  
pp. 61-75
Author(s):  
Alexander Nanka ◽  
Ivan Morozov ◽  
Vladimir Morozov ◽  
Mykola Krekot ◽  
Anatolii Poliakov ◽  
...  
Keyword(s):  
Coefficient Of Variation ◽  
Experimental Studies ◽  
Arithmetic Mean ◽  
Reference Plane ◽  
Grain Flow ◽  
Seed Distribution ◽  
Favorable Conditions ◽  
Inclined Surface ◽  
Analytical Expressions

One of the promising methods for improving the uniformity of seed distribution in the soil is the control of the grain flow by guiding elements in the openers. This creates favorable conditions for the flight of seeds in the openers and when leaving them backwards, which equalizes the speed, in modulus, of seeds and the unit, improves the uniformity of their distribution in the soil. The presence and parameters of the guiding elements of the openers was theoretically substantiated, which gave the development of the process of controlling the grain flow in the openers and at the exit from them by using the guiding elements. Analytical expressions have been obtained to determine the characteristics of the movement of particles on various surfaces, which are recommended to be used for guides in the openers. Experimental studies have shown that openers with guides reduce the coefficient of variation along the row by 20 ... 45% and have it 88 ... 98%, and in depth - 24 ... 27%. On the basis of experiments, it is recommended that 3 ... 4 guides are recommended for front openers (arithmetic mean interval along the row 18.5 ... 23.5 mm, coefficient of variation 88 ... 98%). The advantage of the experimental opener in the distribution of seeds by depth is due to the use of guide elements in combination with an improved soil shedding process. This eliminated the technological drawback - the formation of a sub-opener inclined surface (arithmetic mean interval 42 ... 37 mm, coefficient of variation 24 ... 27%). For a double disc opener, an improved guide is recommended, the bottom edge of which protrudes 2 cm in front of the vertical diameter of the discs and is located at a distance of 9 cm from the reference plane. The arithmetic mean spacing along the row of this opener is 15 mm, the coefficient of variation is 106%.

scholarly journals THE INFLUENCE OF MIXER ROTATION FREQUENCY AND ITS BLADES LENGTH ON THE QUALITY OF THE MIXTURE

2019 ◽  
pp. 63-69
Author(s):  
Мария Фомина ◽  
Mariya Fomina ◽  
Алексей Чупшев ◽  
Aleksey Chupshev ◽  
Вячеслав Терюшков ◽  
...  
Keyword(s):  
Rotation Speed ◽  
Functional Dependence ◽  
Experimental Studies ◽  
Rotation Frequency ◽  
Technological Parameters ◽  
Blade Length ◽  
Blade Mixer ◽  
Mixer Rotation ◽  
Distribution Of Components

The aim of the study is the quality improvement of the feed mixture prepared and substantiation of the design and technological parameters of blade mixer batch- operated. The task is to set the functional dependence between the prepared mixtures quality and the empirical ratio of the intensity of mixing, taking into account the blades length in regard to values of the rotation frequency and the length of the blade of the batch-operated mixer, as well as the definition of rational length of the mixer blades. Improving the quality of mixture requires both the adding of all nec-essary nutrients and feed components into the volume of prepared portion of the mixture as stipulated by the recipe for mixture, and smooth distribution of components throughout the volume of ready feed. Smooth distribution of the mixture components is related to the design and operation of the mixer. Blade mixer batch- operated is one of the effective types of existing mixers, mixing the ingredients of feed with good quality. The article presents the result oriented design scheme of the blade mixer. Positive functions of the mixture quality and the empirical coefficient of mixing intensity included in their composition are assessed taking into account the length of the blades, depending on the rotation speed and frequency of the mixer. The graphic results of experimental studies taking into account the influence of the blade length and the speed of the mixer on the quality of the prepared mixture are given. The increase of blade length and rotation speed improves the quality of the mixture. Recommended blade length is 75...80 mm. With frequency of rotation increase and the length of the blades the total value of the empirical coeffi-cient of the intensity of mixing, depending on the effect of the length of the blades decreases at a slower pace. This is typical of the obtained hyperbolic dependence.

scholarly journals RESEARCH OF TECHNOLOGICAL PARAMETERS OF THE GRATED INSTALLATION

2020 ◽  
Vol 8 (1) ◽  
pp. 95-100
Author(s):  
Sergey Malyukov ◽  
A. Knyazev ◽  
Aleksey Aksenov
Keyword(s):  
Russian Federation ◽  
Experimental Studies ◽  
Rotation Frequency ◽  
Metal Consumption ◽  
Technological Parameters ◽  
Coniferous Trees ◽  
Seed Placement ◽  
The Russian Federation ◽  
Forest Seeds

Annual harvesting of a large number of forest seeds allows for reforestation on the territory of the Russian Federation. Moreover, more than 70% falls on the seeds of coniferous trees. In order to increase their sowing quality and reduce losses, the seeds are dehumidified, cleaned, sorted by density and size, stratification, as well as other technological operations. The use of refined seeds during reforestation allows increasing the productivity of sowing units, improving the quality of seed placement, reducing the volume of seed bins, which leads to a decrease in the metal consumption of sewing machines as a whole. For experimental studies, special sieves were made: plastic with chamfered, plastic with standard holes and plastic with rounded edges. The dependences of the completeness of separation of the procode fraction ε were determined for various combinations of the angle of inclination α and the rotation frequency of the working body ω for various seed thicknesses. The angle of inclination of the working body α was changed from 4 ° to 12 °, in increments of 2 °, rotation frequency ω from 400 min--to 1200 min-¹, in increments of 200 min-¹. The size gap was set taking into account the dimensional characteristics of existing sieves with rectangular holes and was 0.2 mm. Studies were conducted on the seeds of common pine.

scholarly journals СТАТИЧНІ ТА ДИНАМІЧНІ ВЛАСТИВОСТІ ДИЗЕЛЯ З ТУРБОНАДДУВОМ ПРИ ЗМІНОМУ КУТІ ВИПЕРЕДЖЕННЯ ВПОРСКУВАННЯ ПАЛИВА

2012 ◽  
pp. 140-144
Author(s):  
В. І. Левчук ◽  
В. М. Арендаренко ◽  
О. М. Іванов
Keyword(s):  
Diesel Engine ◽  
Fuel Injection ◽  
Dynamic Properties ◽  
Experimental Studies ◽  
Operating Parameters ◽  
Fuel Supply ◽  
Close Relationship

Наведені результати експериментального дослі-дження впливу кута випередження впорскуванняпалива на статичні та динамічні властивості ди-зеля з турбонаддувом. На основі знятих швидкіс-них характеристик робочих параметрів дизеля зарізних установочних кутів випередження впорску-вання палива була дана оцінка ступеня впливу до-сліджуваного регульованого параметра на стати-чні властивості двигуна. З аналізу динамічнихрежимів вільного прискорення дизеля, отриманихпри різних характерах зміни кута випередженнявпорскування палива, зроблені висновки про тіснийвзаємозв’язок між моментом початку подачіпалива та якістю заданого перехідного процесу. The results of experimental studies of the effect of advanceangle of fuel injection on the static and dynamic properties of adiesel engine with a turbocharger have been produced. Thedegree of influence of the controlled parameter on the staticproperties of a diesel engine was assessed on the basis of velocity characteristics of operating parameters of diesel at different advance angles of fuel injection. From the analysis of dynamicmodes of the free acceleration of a diesel engine, produced byvarious characters of changing of the advance angle of fuelinjection, conclusions about the close relationship between theonset of the fuel supply and the quality of a given transitionhave been made.

scholarly journals Functional dependences of the performance of a mixer with helical blades

2020 ◽  
Vol 17 ◽  
pp. 00033 ◽  
Author(s):  
Vladimir B. Novikov ◽  
Vladimir V. Konovalov ◽  
Alexander L. Mishanin ◽  
Marina V. Borisova ◽  
Alexey S. Gretsov
Keyword(s):  
Power Consumption ◽  
Technological Process ◽  
Agricultural Sector ◽  
Rotation Frequency ◽  
The State ◽  
Operating Parameters ◽  
Functional Dependencies ◽  
Shaft Speed ◽  
Livestock Development

The level of livestock development is one of the indicators characterizing the state of economy not only of individual farms, but regions and state as a whole. Therefore, the solution to the problem of the improvement of the quality of feed and modernization of process of its production is relevant and significant for agricultural sector. In order to improve and study the technological process of mixing the grain mixture, a design of a continuous paddle mixing unit was developed. The purpose of the research is to establish functional dependencies on the design and operating parameters of a mixer with helical blades and determine their rational values. The influence of the shaft rotation frequency, the number of its blades and the state of tank fullness on the unevenness of the mixture, productivity and power consumption is determined. The increase in the degree of fullness and shaft speed intensifies the performance of the mixer. The highest mixer performance is provided by 6 blades. The increase in the shaft speed intensifies the power consumption of the mixer. The degree of fullness of the tank and the number of blades also increase power consumption, but to a lesser extent. The best quality of the mixture is provided by 8 blades with a degree of fullness of 2 5 % and a rotation frequency of 40 min-1 with a mixer capacity of about 180 kg/h and a power consumption of 270 watts.

Physico-Chemical Analysis of Groundwater and Effect of Climatic Change in Angul-Talcher Area

2018 ◽  
Vol 6 (12) ◽  
pp. 26
Author(s):  
Aliva Bera ◽  
D.P. Satapathy
Keyword(s):  
Water Resources ◽  
Linear Regression ◽  
Regression Model ◽  
Climatic Change ◽  
Linear Regression Model ◽  
Ann Model ◽  
Quality Of Water ◽  
Physico Chemical ◽  
Simulation Based

In this paper, the linear regression model using ANN and the linear regression model using MS Excel were developed to estimate the physico-chemical concentrations in groundwater using pH, EC, TDS, TH, HCO3 as input parameters and Ca, Mg and K as output parameters. A comparison was made which indicated that ANN model had the better ability to estimate the physic-chemical concentrations in groundwater. An analytical survey along with simulation based tests for finding the climatic change and its effect on agriculture and water bodies in Angul-Talcher area is done. The various seasonal parameters such as pH, BOD, COD, TDS,TSS along with heavy elements like Pb, Cd, Zn, Cu, Fe, Mn concentration in water resources has been analyzed. For past 30 years rainfall data has been analyzed and water quality index values has been studied to find normal and abnormal quality of water resources and matlab based simulation has been done for performance analysis. All results has been analyzed and it is found that the condition is stable. 

The system of indicators of the quality of the carbon-carbon composite materials and technologies of their production

2018 ◽  
pp. 127-132
Author(s):  
T. N. Antipova ◽  
D. S. Shiroyan
Keyword(s):  
Composite Material ◽  
Low Cost ◽  
Experimental Studies ◽  
Carbon Matrix ◽  
Carbon Composite ◽  
Optimal Number ◽  
Laboratory Equipment ◽  
Carbon Composite Material ◽  
Carbon Composite Materials

The system of indicators of quality of carbon-carbon composite material and technological operations of its production is proved in the work. As a result of the experimental studies, with respect to the existing laboratory equipment, the optimal number of cycles of saturation of the reinforcing frame with a carbon matrix is determined. It was found that to obtain a carbon-carbon composite material with a low cost and the required quality indicators, it is necessary to introduce additional parameters of the pitch melt at the impregnation stage.

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