INMATEH - Agricultural Engineering

9-16

Authors: Ivanovs, S.; Bulgakov, V.; Adamchuk, V.; Kyurchev, V.; Kuvachоv, V.;

The conducted researches on a ploughing aggregate, composed according to the "push-pull" scheme as part of the HTZ-16131 tractor with a frontal two-bottom plough and a rear-mounted four-bottom plough, show that there is a positive correlation between the input impact – the turning angle of the driven wheels of the tractor, and the output parameter – its relative bearing. The maximum value of the mutual correlation function between these parameters is quite high, reaching mark 0.88. The researched ploughing aggregate, operating according to the "push-pull" scheme, has satisfactory path indicators. The path variations of the furrow laid by this aggregate are of a low-frequency nature. Arrangement of the supporting wheel of the frontal plough outside the furrow and its movement across an undeveloped agrophone does not lead to the deterioration in the steering ability of the explored ploughing aggregate.

25-30

Authors: K.V. Vasylkovska, O.M. Vasylkovskyi, M.O. Sviren, G.A. Kulik

The construction of a new pneumatic and mechanical seeding device for precision seeding of tilled crops with peripheral location of cells on a seed disk and a passive device for removing unnecessary seeds in a centrifugal method is suggested. It is assumed that the seeding device works even without the creation of vacuum. The parameters of the seeding device have been determined analytically. It was proved that the proposed design of the pneumatic and mechanical seeding device provides qualitative dosage of seeds without creating vacuum in the system, but with a limited angular velocity of 11.25 rad/s. To remove extra seeds in the pneumatic and mechanical seeding device we used pockets in the casing of the seeding device above the filling section in which, under the influence of inertia forces, excess seeds get in and are directed back to the filling section. In order not to remove the main seed along with the extra seed when the rotation velocity of the seed disc approaches the velocity of the seeding device, additional force should be applied that would keep the main seed in the cell, that is, the force of suction.

39-48

Authors: Paziuk, V.M.; Liubin, M.V. ; Yaropud, V.M.; Tokarchuk, O.A.; Tokarchuk, D.M.

The value of the grain seeds is in the ability to germinate and ensure high yields. The main technological process for preserving the properties of seeds is drying. The proper carrying out and providing of rational modes of drying is a necessary condition to preserve the high ability to germinate. For the object of drying we have taken wheat seeds to determine the rational regimes. The research of the drying process kinetics is carried out on a convective drying stand in the following modes: coolant temperature in the drying chamber t = 50-80˚C, velocity V = 0.5-1.5 m/s. The highest intensity of drying occurs from an increase in the temperature of the coolant from 50 to 80°C in 3 times, but the main indicator is wheat maximum permissible temperature, which, at the coolant temperature of 50°C, is 48.6°С. The biochemical indicators of wheat seeds were determined in the laboratory of the Institute of Technical Thermophysics according to the method on the 7th day of germination. The results of the researches showed that the best results of wheat germination were at 50°C at the level of 96%. Coolant temperature of 80°C has the most negative influence on wheat germination as the seeds lose their properties. The analysis of the three-factors of influence, such as temperature and speed of coolant, as well as wheat initial humidity, on seed drying time and germination is done. The obtained regression equations and obtained response surfaces of seed drying time and germination enable us to evaluate the process in terms of drying parameters’ influence.

59-66

Authors: Akimov, A.P.; Konstantinov, Y.V.; Stepanov, A.V.

The objective of this study was to develop a technique for calculating the resultant force and moment of soil resistance to cutting by the blade of the earlier proposed rotary tillage tool as functions of the rotation angle on the basis of the developed mathematical model of soil-blade interaction. The dependences taking into account the constructive and functional parameters were obtained and analyzed. It was shown that the blade is subjected to repeated loads during the soil cutting, so the equivalent resultant force of soil reactions acting on the blade changes its magnitude, direction and the point of action periodically with changing the rotation angle. The obtained formulas can be used both for carrying out the long-term strength analysis of the rotary tool and for optimizing its constructive and functional parameters. The proposed technique allows to simplify experiments for determining the rotary tool force characteristics and to reduce their number significantly. Thanks to the commonality of the assumptions it can be transferred mainly to other rotary tillage tools.

75-82

Authors: Ciupercă R.; Persu C.; Nedelcu A.; Popa L.; Zaica A.; Eng. Ştefan V.

Traffic parameters of the road transport means are influenced beside the loads to be transported, the travel speeds, the constructive and functional characteristics by the air pressure in the tires which has a direct impact on the tire tread wear, rolling resistance, compaction, soil compaction and rolling track wear, and finally on the transport operation costs. This paper presents the research on a transport articulated vehicle made up of an agricultural tractor and a semi-trailer, aiming at continuous monitoring of the transported load in order to determine the optimal air pressure in the tires. In order to monitor the tire pressure, which is directly influenced by the tire load, an installation was created and placed on the articulated vehicle that continuously measures and monitors, in real time, the transported load, consisting mainly of two force transducers, two force amplifiers, a micro PLC (Programmable logic controller), an operating terminal, and the connection elements between them. The records made during experiments are managed using software specifically created for these researches. The experiments were performed at different loads of the semi-trailer, the results obtained from the tests allowing us to determine the authenticity of the software created, on the one hand and the value evolution of the measured parameters, on the other hand. The determined results allow the operator to make optimal decisions on the air pressure in the tire corresponding to the measured load, also taking into account the nature of the transported load, the type and condition of the rolling track.

91-100

Authors: Heyang, Yao; Qiyue, Sun; Xiuguo, Zou; Siyu, Wang; Shixiu, Zhang; Shikai, Zhang; Shuyue, Zhang

Yellow-feather chicken is a common breeding chicken in China. In view of the uncontrollable factors of pasture-raised chickens, the team proposes a precise breeding method of small chicken chamber. In this way, two problems are solved, including heat stress and the effects of environmental factors, such as bedding, fodder, water, wind speed, ammonia and fine particulate matter (PM2.5) on chickens. This experiment studies heat stress and air quality during the 20-day experiment period using the method of a negative pressure fan controlled by an inverter. The experimental results show that under design conditions, all the environments are up to standard, and the weight gain efficiency of chickens is higher than that of free-range chickens and no death is witnessed. This experiment proposes a new breeding model which has been approved by some breeding companies and thus has a broad application prospect.

109-118

Authors: Pourvosoghi, N.; Nikbakht, A.M.; Sharifian, F.; Najafi, R.

Experimental analysis of air velocity and temperature distribution in poultry houses is laborious, especially for large scale houses. Enhanced broiler yield can be obtained when the house is suitably ventilated. Therefore, efficient prediction tools would be vital. Computational fluid dynamics (CFD) provides detailed data on indoor flow patterns, air velocity and temperature distribution in poultry houses giving promising outlooks as an efficient and cost-effective tool to establish optimum ventilation systems. This work focused on evaluation and numerical analysis of the influence of differential pressure (20, 30 and 40 Pa) and fan activation scenarios on indoor air velocity and temperature distribution in a poultry house. Results showed that air velocity tends to be maximum toward the centre of the cross-section of the house and minimum near the floor next to the side walls. Furthermore, it is elucidated that considerable thermal discomfort for chickens is likely due to temperature variation at the proximity to the exhaust fans. Based on the evaluations of pressure variation on the air velocity distribution, quick estimation of the air velocity can be obtained in the zones occupied by chickens. Generally speaking, numerical computation of the equations dominating the poultry house leads to desirable control model of the ventilation and aeration. This would be vital in decision making and economical management of the house.

129-136

Authors: Jiaxin, Zheng; Yanyu, Gao; Hongfang, Yuan; Rong, Chen

To improve the seed spacing consistency of vertical-disc seeders and starting from the mechanical compulsory seed metering, we designed a variable-volume hole precision seeder that adopts a cam push-rod structure to realize the compulsory seed metering. We studied the overall design of this new seeder. The optimal hole parameters were determined. Response surface method (RSM) was used in trial design, and this scheme was implemented on the discrete element software EDEM. RSM regression and prediction optimization show the optimal hole parameters are hole diameter 10 mm, depth 6.5 mm, and chamfer 2 mm. Comparative tests on the bench show that the new seeder is over the vertical-disc device showing 14%-21% higher longitudinal consistency and 18%-26% higher transversal consistency. The hole-typed volume-variable precision seeder with a cam push-rod structure would significantly improve the seed spacing consistency.

147-154

Authors: Yongqiang, He; Junlin, He; Xiaobin, Du; Dawei, Fang;

We developed finger-type lifter test bench to address low fruit removal rate and high breakage rate during the lodging of Cerasus humilis branches. The bench is mainly composed of a frame, branches lifter, gripping delivery device, fruit removal device and control system. A single factor experiment was carried out, and fruit removal rate and breakage rate were used as the evaluation indexes. The elevation angle, declination angle, poking finger speed and conveying speed were selected as the experimental factors. Results showed that the influence of the declination angle was small. To determine the optimum parameter combination, we performed the three factors and three levels central composite orthogonal experiment, using the fruit removal rate and breakage rate as the evaluation indexes, while elevation angle, speed of poking fingers and conveying speed as the experimental factors. The results showed that elevation rate had the largest effect on removal rate, followed by poking fingers speed and conveying speed. Meanwhile, conveying speed had the largest effect on breakage rate, followed by poking fingers speed and elevation angle. The optimal parameter combination includes elevation angle of 56°, poking fingers speed of 1.02 m/s and conveying speed of 0.27 m/s and corresponding fruit removal rate of 96.07% and breakage rate of 4.58%. The bench verification experiment was performed according to the combination of the parameters, and the results showed that the removal rate was 97.28% and the breakage rate was 5.01%. The relative errors of the experimental value and the theoretical optimisation value were 1.24% and 8.58%, respectively.

165-174

Authors: Yu, Fan; Ping, Zhao; Lichun, Qiu; Jizhe, Zhao

Based on the viewpoint and theory of the integration between agricultural machinery and agronomy, by taking five early-maturing varieties of potato widely planted in western Liaoning Province as the research object, this paper applies the universal material testing machines and electric drum drying ovens etc. in the experiment and obtains the change law of moisture content of potatoes after harvest within 0-5 months, the compressive mechanical properties of potato with different moisture content were tested. The variation of breaking force, maximum deformation and elastic modulus of potato with different moisture content were obtained. Therefore, the experimental results can provide necessary mechanical parameters and theoretical references for the harvesting, storage, the design research on processing/transportation equipment, and the placement method of early-maturing potato in western Liaoning

185-192

Authors: Gorobets, V.G.; Trokhaniak, V.I.; Rogovskii, I.L.; Titova, L.L.;

In this paper the numerical evaluation for heat and mass transfer during the air ventilation in poultry houses’ premises was provided. The analysis of the proposed conditions for heat and mass transfer in poultry houses depends on the ventilators location in the poultry house’s altitude. The efficiency of this equipment’s location was determined. The observed climate-control supporting system for poultry-houses is based on the external air cooling by water from underground wells. The simulation was made for 2D computational fluid dynamics (CFD) analyses by ANSYS Fluent software. The CFD analysis for the air flow analysis scheme CFD and heat condition inside the poultry house was proposed. The geometrical ventilation equipment and the best ways of its location in the poultry house were found by the results of numerical simulation.

203-210

Authors: Gunasekara, K.G.; Dharmasena, D.A.N.; Silva, F.H.C.A.

Rice is the staple food of Sri Lankans and both parboiled and raw rice forms of medium and slender grain types are popular in Sri Lanka. These two shaped grain varieties were selected and the optimum presoaking duration was calculated using the Peleg’s model. The optimum rice to water ratios were determined for different rice types. A three factor factorial experiment was used to analyse the cooking energy and cooking time, considering the grain shape, rice grain process condition and pre-cooking condition. Soaking durations for 86% rice grain saturation was 10 minutes for both shapes in raw form and the optimum rice: water ratio was 1:2. Parboiled forms, slender grains and un-soaked rice consumed considerably higher amounts of cooking energy and time than raw rice forms, medium type grains and pre-soaked rice. When considering pre-cooking condition and process condition, highest cooking energy and time is consumed by un-soaked parboiled form of rice. Pre-soaked raw rice requires the least and saved about 40% of energy and time compared to the unsoaked parboiled rice. With respect to process condition and grain type, Parboiled slender grains consume the highest cooking energy and cooking time while cooking Raw medium type grains saves about 40% of those requirements.

9-18

Authors: Golub G.A., Kukharets S.M., Tsyvenkova N.M., Golubenko A.A., Kalenichenko P.S.

A method of defining an optimal blowing mode for the boiler when burning agricultural plant residues with varying moisture content, by measuring flue gases temperature was proposed. A multifactor experiment was planned to interconnect the above-mentioned parameters. A tuning chart for the boiler was built based on the results. It was defined that maximum flue gases temperature is an indicator of optimal air supply, i.e. flue gases temperature is an estimate indicator of combustion completeness. As a result of researching regime parameters when burning different plant residue mixtures and analysing received response surfaces, the parameters for maximized heat productivity were obtained.

27-34

Authors: Vlăduţ D.I., Biriş S., Vlăduţ V., Cujbescu D., Ungureanu N., Găgeanu I.

The paper presents the results obtained from experimental researches carried out under exploitation conditions in order to determinate the qualitative working indices of an equipment used for preparing the seedbed for heavy soils: the vegetal debris coverage degree and the soil crushing degree, as well as the energy indices: slipping, traction and fuel consumption, depending on the depth, soil moisture and working speed.

45-52

Authors: Bandura, V.; Bulgakov, V.; Adamchuk, V.; Ivanovs, S.;

Intensification of the technological processes in the production of vegetable oils is a topical scientific and practical task. It is assumed that extracts from the plant raw materials obtained by exposure to the electromagnetic microwave field possess qualitatively new biochemical and biological properties in comparison with similar extracts obtained by means of the conventional extraction methods. The article deals with possibilities to reduce the duration of the extraction process of the soybean and canola seeds, to achieve great output of the target component, to increase the number of valuable components (tocopherols) in the finished product. It has been established that in the microwave intensifier, in contrast to the classic method of extraction, the extraction time of the soybean and canola seeds is reduced to 70%, but the output of the target component increases within the limits of 30%.

63-70

Authors: Aksenov, A.G.; Izmaylov, A.Iu.; Dorokhov, A.S.; Sibirev, A.V.;

The existing seed-onion planting machines provide that the sowing machines select bulbs from the total mass by group rather than by piece. As a result, the bulbs are not planted with their stems down and at a preset spacing. Therefore, new solutions are needed to maintain bulb stems downward position in the furrow. The article discusses various designs of planting devices for planting machines and highlights their main advantages and disadvantages. It also provides an overview of an engineering sample design of the planting machine equipped with vibration-pneumatic planting device for oriented seed-onion planting in the furrow.

77-86

Authors: Boja, N.; Boja, F.; Vidrean, D.; Teusdea, A.; Bungescu, S.; Borz, SA.;

Seedbed preparation for crop establishment (sowing) is one of the most important agricultural works, as it is done with high energy consumption and high costs. The quality of this work influences to a large extent crop germination and the productivity that can be obtained per hectare. Therefore, at present, there is different equipment from the one found in classical cultivation technologies, which by single pass can achieve tillage with minimum energy consumption, thus creating optimal conditions for sowing and for obtaining higher yield without soil degradation. These devices are called combinators. Of all the existing combinators, the most performant are the vibro-combinators. In order to carry out the research, we settled in six parcels in the plains of the West of Romania so that we could have three different types of soils which are representative for that specific area. From each profile soil samples were collected in three steps of 6, 12 and 18 cm. For each sample six repetitions were performed (N = 6). We started by measuring the particle size distribution (granulometric composition) and the main physical properties of the soil (moisture, bulk density, total porosity and soil compression degree).

97-104

Authors: Hevko, R.B.; Liubin, M.V.; Tokarchuk, O.A.; Lyashuk, O.L.; Pohrishchuk, B.V.; Klendii, O.M.;

The results of theoretical and experimental studies of simultaneous transporting and mixing the components of feed mixtures along the curvilinear paths of tubular conveyors are presented in this article. A mathematical model of the dependence of the change of elementary work performed while transporting the bulk material elementary mass along the curvilinear section is developed. Based on experimental researches, the technique of determining the technological parameters, which ensure the reduction of energy consumption while mixing bulk materials with the given quality of feed mixtures, is proposed. When considering the range of changes in the inner holes of the washers dh = 14…25 mm and the angles of their position to the horizon  = 30°…75°, the intensity of the material components passing-through and their consequent mixing increases with the increase of the value of the parameter dh and the reduction of the angle .

113-120

Authors: Kupchuk, I.M.; Solona, O.V.; Derevenko, I.A.; Tverdokhlib, I.V.;

One of the most energy-intensive operations used in feed technology for livestock is grinding. Therefore, scientific research aimed at minimizing the consumption of energy resources by technological machines – crushers and increasing the energy efficiency of the process in general is an important task. When grinding grain with a moisture content index above the basic condition, there is a low efficiency of the method of crushing by impact due to the increased plasticity of the material and an increase in the value of the marginal deformation that the grain can perceive before fracture. Partial solution of this problem is possible by combining the method of cutting and impact, which formed the basis of a technical solution implemented in the scientific laboratory of the Vinnytsia National Agrarian University. In previous scientific research, the authors developed and analyzed a mathematical model of energy consumption by a crusher drive. As a result of theoretical studies, the analytical and graphical dependence of the energy consumption by the drive from the angular velocity of the crusher rotor shaft was obtained. The aim of this article is to verify the reliability of a mathematical model by conducting experimental tests and comparing the results of experimental researches with theoretical researches. The experimental part of the work was performed in the laboratories of the department of processes and processing equipment and food industries of the Vinnytsia National Agrarian University and the specialized laboratory of «Ovchatsky» MPD, SE «Ukrspirt», using the experimental-industrial model of the vibration disc-type crusher. The EMF-1:1 electronic wattmeter recorded energy consumption, as well as wireless tachometer UNI-T UT372 the rotation frequency of the drive shaft (rotor). Verification of the mathematical model has shown a high level of its adequacy, and it can be used in the designing of a vibrating disc crusher of this type.

131-140

Authors: Darwin, Muhammad Ilham, Afrizal Fazil

Biogas is a clean and cheap renewable energy that can be used for generating electricity. One of the current methods applied to enhance biogas production was through anaerobic co-digestion. The current study revealed that anaerobic digestion of cow manure co-digested with cocoa husk produced higher biogas production (348.3 mL/day) than anaerobic digestion of cow manure alone (26.5 mL/day). Even if a high organic loading rate (OLR) (4.173 kg VS/m3.day) was applied to the reactor of anaerobic co-digestion, no inhibition was found at which pH was stable at 7.08. The results suggested that high OLR and short HRT (10 days) did not inhibit biogas production.

151-160

Authors: Kai, Zhao; Jingwei, Chang; Xinming, Ma; Feng, Zhao;

As a progressively accumulating and dynamically changing process, agricultural drought stress is influenced by various factors, such as atmospheric environment, hydrogeology and vegetation. To master the change laws of soil drought, we proposed a novel soil drought monitoring forecasting method based on Google cloud computing service platform. The Google cloud computing platform Google App Engine was analysed. This computing platform was utilized for drought monitoring. A three-layer back-propagation neural network was used for the forecasting analysis of corresponding soil drought. The accuracy of the method was verified through an experiment. Results demonstrate that all the relative errors of the method were lower than 10% and thus it has a high monitoring precision. These findings can be used as a theoretical basis for formulating strategies for drought resistance. The proposed method provides a good prospect to drought monitoring and forecasting strategies using other cloud computing platforms.

171-180

Authors: Nalobina, О.O.; Gerasymchuk, O.P.; Puts, V.S.; Martyniuk, V.L.; Shovkomyd, O.V.; Vasylchuk, N.V.; Bundza, О.Z.; Holotiuk, M.V.; Serilko, D.L.;

The design of a reaper that provides grinding of stems, which eliminates the need for mulcher application, offers the conditions for introducing a new technology of growing No-Till crops in agrarian enterprises. The substantiation method of the analytical model is proposed, which allows to determine the nature of the stem movement on the side surface of the sunflower header elevator in the process of their interaction.

6

Authors: Kabas O., Kabaş A., Ünal İ.

Effect of maturity time as colour on mechanical properties is important for long way transportation. In this research, some physical and mechanical properties of beef tomato (Tybeef) grown in the Antalya region were determined based on the puncture tests. The tests were carried out at four maturity stages namely green, light pink, pink and red colour. Size and sphericity were measured using the standard methods. Surface colour of tomatoes were determined using a colorimeter and the mechanical properties such as puncture force and stress, puncture energy, deformation, strength and elastic modulus by texture analyser. The puncture force and energy values were found different at 5% probability level for all the maturity stages. Deformation, failure stress and toughness values were found different at 1% probability level for all the maturity stages. Statistically, there is no difference in the modulus of elasticity values for all the maturity stages. In conclusion, it was found that L*/a*/b* and C*/h colour parameter can be a good index for evaluating mechanical properties of beef tomato.

8

Authors: Voicu Gh., Toma M.L., Tudor P., Ipate G., Ştefan V.

Choosing the physical characteristics of geosynthetics used in the construction of municipal waste landfills must be carried out according to the functions they must fulfil - sealing, filtration, protection. Since the geomembranes are subjected to significant compressive stress, and tearing by sticking against hard objects, experimental determinations are necessary to be made both in laboratory and in-situ for the determination of its resistance over time. The protection of the geomembranes shall be carried out, usually with geotextile, and its characteristics must also be established by experimental determinations. The results of measurements of the laboratory tests carried out both on a membrane of HDPE and a nonwoven PP geotextile, and the values of their deformation according to the pressing force led to the identification of the best correlate experimental data by regression curve analysis are presented in this paper.

8

Authors: Vlăduţ V., Maican E., Apostol L., Ungureanu N., Dumitru I., Oprescu R.

The coupling devices must be checked for the resistance they provide during the movement of a mobile aggregate (tractor + trailer or agricultural machine), which can be done by a finite element analysis (SOLIDWORKS Simulation, CATIA, ANSYS, etc.) or by testing in service or, the fastest, in simulated and accelerated mode on special installations. The paper presents the results obtained by finite element analysis of a 55 HP tractor draught bar (after meshing the model), determining the most stressed points and the maximum risk areas where breaks will occur, respectively after performing the tests in static and dynamic mode (in case of fatigue) on the simulated and accelerated test installation to determine if deformations or breaking result from stresses.

8

Authors: Chao Wang, GuoLiang Zhang, Liu Yang , ChuanYang Zhang

In order to solve the problems of natural drying peanut with long drying cycle, huge resource and vulnerable to pollution, a solar drying peanut device taking solar energy as the main energy source and electric energy as the auxiliary energy source is designed. The working principle, device structure, drying chamber and heat collector are also studied. The heat collector performance of solar collector system is simulated by utilizing TRNSYS. The simulation results show that the total solar heat collector inclined surface radiation, temperature of solar collector, and electric auxiliary heating rate and water layer changes with time.

8

Authors: Kotov B.I., Spirin А.В., Tverdokhlib I.V. , Polyevoda Y.A., Hryshchenko V.O., Kalinichenko R.A.

The mathematical description of the cooling process dynamics of seed material in a layer, as a method of temporary preservation of grain with cold, before further processing is given.

8

Authors: Hu Z.C., LV X.L., Peng B.L., Wu F., Yu Z.Y.

The paper researches the effect of structure and operation parameters of the self-developed half-feeding peanut picking device on the picking performance by response surface methodology. Through the response surface optimization test and design principle of Box-Behnken, the cylinder length, roller diameter, the overlap distance of outlet end, the roller speed and the clamping conveying speed are taken as factors; the synthetic weighted mark method is used to obtain the response value that taking the comprehensive index determined by the picking rate of the peanut pods as the test. The paper also makes response surface analysis to the effect of different factor level on the comprehensive index. The quadratic polynomial regression model of each factor to the effect of the comprehensive index is established. The factors are optimized and the optimization results are tested through the picking experiment. The experiment results show that when the picking roller length is 875mm, the roller diameter is 158mm, the overlap distance of roller outlet is 5.6mm, the rotational speed of picking is 302rpm and the clamping conveying speed is 1.1m/s, which is the optimal parameter combination. The quadratic polynomial regression model established can reflect the effect of each index on the working performance optimally. The optimization results based on the quadratic polynomial regression model are consistent with the actual operation. The research provides a technical basis for the improvement of peanut harvesting machinery

8

Authors: Hevko R.B., Strishenets O.M., Lyashuk O.L., Tkachenko I.G., Klendii O.M., Dzyura V.O.

The paper presents the developed design of a research prototype of a pneumatic screw conveyor and the research methodology aimed at determining power characteristics for moving various types of loose materials depending on the influence of pressure and air volume. The dependences of pneumatic screw conveyor efficiency on the change in the area of a hopper hole, the rotation frequency of a screw feeder and the value of an operating air pressure in a technological line have been determined. The influence of the form and the geometrical parameters of a central replaceable nozzle on the distance of loose materials transportation has been determined.

10

Authors: Baranovsky V.M., Hevko R.B., Dzyura V.O. , Klendii O.M., Klendii M.B. , Romanovsky R.M.

The article presents the justification of rational parameters of the operating parts of a pneumoconveyor screw. The dependences of pressure screw efficiency on the change in design and kinematic parameters and process variables of a screw and on loose material characteristics have been considered. In addition, general analysis of the choice substantiation of a feeder pressure screw diameter and the cross-sectional area of a hopper loading opening, which provides the required efficiency of a pneumoconveyor screw, has been conducted.

10

Authors: Kuznetsov Y.A., Volzhentsev А.V., Kolomeichenko А.V., Kalashnikova L.V.

We suggest the construction of pseudofluidized layer grain dryer, which allows carrying out grain recirculation inside the dryer with interchange of heating-cooling cycles and providing the possibility to supply drying agent with high temperature into the drying chamber without risking degradation of grain material quality. The dependence of grain heating temperature on drying duration, drying agent temperature and airflow rate are determined. Experimental investigations allowed establishing the rational values of the factors restricting grain overheating beyond maximum permissible temperature.

10

Authors: Shevchenko I.A, Aliev E.B.

The results of numerical simulation and experimental research on the seed transfer process under the influence of the working part of the photoelectronic separator seed supply unit are presented. There has been developed physics and mathematical model, which links the productivity of the seed supply unit of the photoelectronic separator, its power consumption and the average time interval between falling seeds from the seeds supply, the frequency of vibroplate oscillations and the rotational speed of the barrel. During research, there has been solved a compromise problem of maximization of the average time interval between falling seeds and the minimization of the power consumed by the seed supply unit, with the maximum value of its productivity, which is comparable to the value of the seed supply.