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 The influence of brushing on the surface quality of aluminium

2018 ◽  
Vol 178 ◽  
pp. 01015 ◽  
Author(s):  
Uwe Teicher ◽  
Richard Schulze ◽  
Alexander Brosius ◽  
Andreas Nestler
Keyword(s):  
Surface Quality ◽  
Force Measurement ◽  
Experimental Studies ◽  
Cutting Speed ◽  
Technological Parameters ◽  
Milling Operation ◽  
Metal Machining ◽  
Modelling Methods ◽  
Main Influence

The extension of technical capabilities of machine centres for complete machining of components can improve their performance. In the field of sheet metal machining, the objective beside the classic milling operation was a generation of functional surfaces by face brushing. The experimental studies have probed the influence of tools and technological parameters on the surface quality. In addition to an analysis of the relevant roughness parameters the formation of the surface topography was analysed by several measurement methods. By the application of force measurement, the results of the surface quality can be interpreted additionally. It could be shown that the feed rate in contrast to the cutting speed has the main influence on the surface roughness. A peculiarity is given by the parameter-based width of cut that should be known for reliable process control. The acquired data can be applied in the form of process characteristic fields for further processing with simulation and modelling methods.

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 INFLUENCE OF THE BIOMASS CARRIER TYPE ON THE OXYGEN TRANSFER RATE OF THE MODIFIED SUBMERSIBLE ROTATING BIOFILTER

2021 ◽  
Vol 10 (4) ◽  
pp. 60-68
Author(s):  
Maram Ali SAIED ◽  
Nikolay S. SERPOKRYLOV ◽  
Vladimir V. NELIDIN
Keyword(s):  
Oxygen Transfer ◽  
Transfer Rate ◽  
Rotation Speed ◽  
Mass Transfer Rate ◽  
Oxygen Transfer Rate ◽  
Immersion Depth ◽  
Treated Wastewater ◽  
Technological Parameters ◽  
Effi Ciency

The modifi ed submersible rotating biofi lter MSRB was developed and patented to improve the effi ciency and quality of treated wastewater from small sett lements in Syria by increasing the mass transfer rate and oxygen transfer rate of the drum-type rotating biofi lter without the need for additional aeration elements. The result of comparing the eff ect of two types of biomass carrier on the oxygen transfer rate OTR shows that the highest value of the OTR when using the fi rst biomass carrier (1) was 409 g/m3·h with a drum fi lling percentage of 60%, a rotation speed of 15 rpm and an immersion depth of 35% While the maximum value when using the second biomass carrier (2) was 518.95 g/m3·h with a drum fi lling percentage of 90%, a rotation speed of 15 rpm and an immersion depth of 15%. It can also be concluded that a change in the shape of the biomass carrier, as well as its density, signifi cantly aff ects the OTR of the biofi lter. In addition, changing the shape of the biomass carrier requires changing other technological parameters, such as the fi lling percentage of the drum, the depth of immersion and the rotation speed.

scholarly journals RESEARCH OF THE POSSIBILITY OF INCREASING THE QUALITY OF PREPARATION OF DRY MIXTURES IN A HORIZONTAL VANE MIXER

2021 ◽  
Vol 6 (10) ◽  
pp. 99-108
Author(s):  
S. Khanin ◽  
N. Kikin ◽  
O. Mordovskaya
Keyword(s):  
Compressive Strength ◽  
Building Materials ◽  
Experimental Studies ◽  
Ultimate Compressive Strength ◽  
Regression Equations ◽  
Technological Parameters ◽  
Sand Mixture ◽  
Paddle Mixer ◽  
Mixed Material

Paddle mixers with horizontal shafts are common at building materials enterprises for the preparation of concretes, mortars, dry mortars. A new design of a horizontal paddle mixer with rod elements located in front of the working surfaces of the blades, changing the trajectories of material particles, increasing their mobility, which leads to an increase in the degree of homogeneity of the mixed material, is considered. The aim of the study was to assess the influence of rod elements on the quality of preparation of a cement-sand mixture, to establish patterns of influence on it by the design and technological parameters of a two-shaft paddle mixer and to determine the areas of their rational values. The following tasks have been solved. A bench installation of a two-shaft horizontal paddle mixer with rod elements has been developed, on which experimental studies have been carried out on the preparation of dry cement-sand mixtures. For the criterion characterizing the quality of the mixture, the ultimate compressive strength of the prism specimens made from it is adopted. Regression equations are obtained that adequately describe the compressive strength of prism samples from the design and technological parameters of the mixer: the angle of the blades, the distance from the working surfaces of the blades to the rod elements, the rotational speed of the blade shafts, and their analysis is performed. The analysis of the change in the ultimate compressive strength of the prism specimens from the parameters under study is carried out, the rational ranges of their values are determined. It was found that a mixer with rod elements allows to obtain a dry cement-sand mixture, products from which have a higher compressive strength. During the work, the method of mathematical planning of experiments was used. As a result of the study, an assessment of the influence of rod elements on the quality of preparation of a cement-sand mixture was carried out, the regularities of the influence on it of the design and technological parameters of a two-shaft paddle mixer and the area of their rational values were established.

EXPANSION OF TECHNOLOGICAL CHARACTERISTICS OF THE HARROWING UNIT

2021 ◽  
Vol 1 (142) ◽  
pp. 83-88
Author(s):  
Aleksandr Slepenkov ◽  
◽  
Sergey Kulinchenko ◽  
Sergey Shchitov ◽  
Evgeniy Kuznetsov
Keyword(s):  
Experimental Studies ◽  
Research Purpose ◽  
Design Parameters ◽  
Necessary Condition ◽  
Technological Parameters ◽  
Depth Of Processing ◽  
Technological Characteristics ◽  
Low Load ◽  
Priority Direction

Improving the quality of pre-sowing tillage is a priority direction. Harrowing with the use of heavy disc harrows is one of the operations of pre-sowing tillage. An important task when using heavy disc harrows is to ensure sufficient load on the working body. (Research purpose) The research purpose is in increasing the efficiency of the harrowing process by adjusting the coupling weight in the tractor-harrow link using special devices. (Materials and methods) It is important to match the necessary condition of balance between the load on the working body and the traction qualities of the tractor with a low load-bearing capacity of the soil. The article describes a regulator of the coupling weight of the harrowing unit, for which was applied a patent. The article presents the general types of connection of the device with the disk harrow frame. (Results and discussion) The proposed device allows you to redistribute the weight of the unit, thereby automatically changing the load on the working body. Authors performed experimental studies on the influence of the main design parameters of the devices on the operation of the machine and tractor unit. (Conclusions) The proposed device allows, by expanding the design and technological parameters, to regulate the depth of processing, traction characteristics and speed of the harrowing unit.

Simulation of the process stripping harvester for the collection of oilseed flax seeds

2021 ◽  
pp. 127-135
Keyword(s):  
Numerical Modeling ◽  
Mass Fraction ◽  
Rational Design ◽  
Agricultural Sector ◽  
Rotation Frequency ◽  
Technological Parameters ◽  
Seed Loss ◽  
Loss Index ◽  
Flax Seeds

The article presents the main results of research on the development of a physical and mathematical model of the technological process of collecting flax seeds with a combing header and the justification of the range of its operating parameters based on software simulation and numerical modeling. The process of harvesting agricultural crops, including oil flax, is an important technological operation of their production in the agricultural sector of Ukraine. The positive dynamics of the growth of oil flax production, which is due to the growing demand for seeds in the domestic and foreign markets, requires the intensification of harvesting equipment technological processes. The main reasons for restraining the production of oil flax are the imperfection of the equipment for harvesting and the inconsistency of the quality indicators of work with the established requirements. One of the directions for solving this problem is the technology of harvesting by stripping plants on the standing. Timely harvesting of oil flax seeds in optimal agrotechnical terms (plant condition, weather conditions, weediness, etc.) with minimal losses and contamination of the heap is one of the important scientific tasks of improving harvesting technology. Improving the efficiency of collecting oil flax seeds and, as a result, improving the quality of products requires new approaches to the development and implementation of technical means in progressive technologies. As a result of numerical modeling of the separation process of a heap in a combing header with a curvilinear casing shape, taking into account the physical and mechanical properties of its components, the dependences of the mass fraction of husk and stem particles leaving its area (an indicator of the quality of cleaning the heap from impurities) δh and the fraction of seeds and capsules leaving with seeds (seed loss index) δs from the rotation frequency of the beater-reflector n1 and the stripping drum n2, the position of the transparent zone of the boundary L and its width B. Solving the compromise problem, namely, maximizing the mass fraction of husk and stalk particles leaving the header area (quality indicator cleaning the heap from impurities) δh and minimizing the proportion of seeds and seed boxes leaving the header area (seed loss index) δs Obtained rational design and technological parameters of the combing type header with a curved casing: rotation frequency of the beater-reflector n1 = 782 rpm, combing drum rotation speed n2 = 671 rpm, transparent position zone of the boundaries L = 0.82 m and its width B = 0.45 m. In this case, the mass fraction of husk and stem particles leaving is δh = 42.4%, and the fraction of losses of seeds and capsules with seeds from the header area is in accordance with δs = 2.5%.

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 INVESTIGATION OF SUBSTRATE MIXING PROCESS IN ROTATING DRUM REACTOR

2021 ◽  
pp. 51-60
Author(s):  
Gennadii Golub ◽  
Nataliya Tsyvenkova ◽  
Anna Holubenko ◽  
Vyacheslav Chuba ◽  
Marina Tereshchuk
Keyword(s):  
Rotation Speed ◽  
Design Parameters ◽  
Rotating Drum ◽  
Chemical Parameters ◽  
Technological Parameters ◽  
Type Reactor ◽  
Multifactor Experiment ◽  
Operational Modes ◽  
Surface Angle

The results of the research on the influence of the drum type reactor design-technological parameters and the substrate`s physical-chemical parameters on the substrate`s components mixing evenness, that influence the quality of the received compost, are presented in this paper. By the method of the multifactor experiment rational values of the drum rotation speed, the blades (mounted on the inner drum surface) angle and the substrate`s moisture content are defined at which the components distribution homogeneity in the substrate reaches maximal value. The abovementioned, in turn, provides high compost quality by the agrichemical indices. The recommendations are given to pick the design parameters and operational modes of the drum type reactor.

scholarly journals REDUCING SEED DAMAGE IN THE RAW COTTON SEPARATOR

2021 ◽  
Vol 53 (3) ◽  
pp. 48-51
Author(s):  
Orif Zh. Murodov
Keyword(s):  
Air Flow ◽  
Experimental Studies ◽  
Mechanical Damage ◽  
Air Flow Rate ◽  
Technological Parameters ◽  
Main Design ◽  
Seed Damage ◽  
Separation Chamber ◽  
Quality Of Products

The article discusses the design features of the CX cotton separator. As a result of the analysis, the main reasons are established that lead to increased mechanical damage to seeds, and, as a consequence, to a decrease in the quality of products of the cotton ginning industry. The modernisation of the existing design of the separator is proposed by installing a visor at the outlet of the air flow into the separating chamber. On the basis of experimental studies, a regression mathematical model was obtained, which made it possible to assess the influence of the main design and technological parameters on the mechanical damage of seeds. It was found that this parameter, in addition to the position of the visor, is significantly influenced by the air flow rate at the entrance to the separation chamber and the separator performance. Recommendations on the choice of the position of the visor are obtained.

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