Don state agrarian University
Author list of organization
List of articles written by the authors of the organization
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RESEARCH OF APPLICABILITY OF MATHEMATICAL METHODS FOR THE RAW MEAT QUALITY ANALYSIS
06.00.00 Agricultural sciences
DescriptionIn the present article we have building and comparison of linear regression and neural network based mathematical models of raw meat organoleptic evaluation from the main physical, chemical, functional and technological parameters performed
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Description
The aim of the work is theoretical and experimental confirmation of the possibility of improvement in tractor unit acceleration due to the variable inertia moment of the rotating masses of the engine. The use of high-speed tractors in agricultural production meets a number of difficulties associated with unsteady processes during acceleration of the tractor units. The emerging significant inertial loads during acceleration result in the loss of engine power because of what the machine and tractor unit is operating at reduced productivity and efficiency. An analysis of published works shows that the tractor unit acceleration is strongly influenced by the rotating mass of the engine. A device based on the application of additional rotating masses in a free flywheel connected or disconnected automatically to the main engine flywheel at appropriate stages is offered. As a result, the tension during acceleration is reduced. The results of experimental studies on the effect of the additional rotating masses on the engine acceleration characteristics of the machine and tractor units on the basis of Class 1.4 tractor are given. It is proved that the use of the tractor additional rotating mass connected or disconnected to the respective modes of movement of a machine and tractor unit to the flywheel of the engine, improves acceleration performance
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Description
The aim of the work is theoretical and experimental confirmation of the possibility of improving the rate of acceleration of tractor units due to installing of elastic-damping mechanism with variable stiffness in tractor transmission. Speed tractors application in agricultural production meets a number of difficulties associated with the unsteady processes during acceleration of machine and tractor units. The resulting large inertial loads when accelerating result in loss of engine power, due to which the machinetractor unit is operating at reduced performance and efficiency. An analysis of published studies shows that the acceleration performance of tractor units is greatly influenced by the stiffness and damping properties of the transmission of energy resources. To provide smooth acceleration of the unit it is proposed to install elastic-damping mechanism with variable stiffness in tractor transmission. As a result, the tension of the acceleration process decreases. The results of analytical and experimental studies on the effect of elastic-damping mechanism installed in the class 5 tractor transmission, on acceleration capabilities of tractor units are given. The optimum parameters of elements of elastic-damping mechanism with variable stiffness for class 5 tractors are determined. It is proved that the use of elastic-damping mechanism with a variable stiffness in the tractor transmission improves acceleration indicators
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THE STUDY OF THE PROPERTIES OF BEDDING MATERIAL FOR ANIMALS OF THE NORTH CAUCASUS REGION
DescriptionThis article presents the results of moisture-absorbing properties of the bedding material depending on the type, size and time of moisture absorption
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TO THE PROOF OF THE NONDEMOUNTABLE METHOD OF REPAIR OF THE HIGH PRESSURE FUEL PUMP
DescriptionThis article discusses the application of the method of selective transfer to restore the plunger pairs of high pressure fuel pumps of diesel engines. To restore plunger pairs the authors of the article propose to use an anti-friction repair-and-renewal composition on the basis of the mineral serpentinite
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TO THE THEORY OF STRENGTH OF DIESEL ENGINE EXHAUST GAS PURIFICATION OF SOOT PARTICLES
DescriptionThe problem of environmental protection from the contamination by toxic products, contained in the exhaust gases, is one of the most topical in the modern world. Nitrogen oxides and soot particles are the most toxic. Getting into the environment and the human body, they cause heavy chronic disease and significantly impair the quality of animal and plant products. The developed gas purification system SCR, the technology of plasma purification of exhaust gases have not found wide practical applications because of their high value. The study of papers dedicated to reducing exhaust gas toxicity shows that the use of combined means of purification, which usually include mechanical, thermal and catalytic methods of purification, is the most effective. Our work deals with the issue of purifying the diesel engine exhaust from fine particulate matter resulting in the combustion of fuel and oil motor partly. The article notes that the carbon is not magnetic, so the use of a magnetic field acting as an agent for the purification of exhaust gas from the carbon soot particles is impossible. The purification in a centrifugal field requires the creation of structurally complex centrifuges, so it is ineffective. We consider the possibility of purifying the exhaust gases from the soot particles in the electrostatic field. The device presents the collecting electrode, which is shaped as a cylinder, and an axial central electrode, which is mounted on an insulated spacer within the cylindrical body. The study deals with the physical and mathematical simulation of processes occurring in the proposed device of the purification of exhaust gases. The equality of the Coulomb force and the Stoks force determines the magnitude of the electrostatic field strength that is necessary for the purification of exhaust gas from the soot particles. We have identified the desired length of the collecting electrode
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Description
Plowing is the main and most energy-intensive way of primary tillage. The development and the introduction of the energy-saving ways of the primary tillage are of great scientific and practical interest. In the Azov-Black Engineering Institute, we have developed a combined method of the tillage and a tool using left-hand blades designed to handle the lower layers of the soil. The tool is designed for a layered tillage providing moldboard shallow and mouldboardless shallow (12 ... 18 cm) subsurface tillage using the cropping and the offset of the lower layer of soil in the direction of the daylight surface. The installation of the left-hand blades is designed to decrease the energy intensity of the technological process by reducing the weight of soil treated by the plow body. The aim of this study is to compare the energy assessment of the three ways of the tillage: - Plowing without skimmers; - Plowing with coulters being at the wall of the furrow; - Plowing with a left-hand blades tool. The study has been carried out using a graphical simulation of the shifting of the center of gravity of the soil layer. The assessment of the energy intensity of the technological process has been carried out by the capacity value consumed to shift the center of gravity of the treated layer of soil at the different depths of the tillage. The results of the study have showed that the change of the total quantity of the shifting of the center of gravity of the treated soil layer ranges from 0.43 ... to 0.67 m in respect of the two first-mentioned ways of plowing, while the same index in respect of the combined tool ranges from 0.37 ...to 0.55 m. The maximum power consumption of the process is also higher in respect of the two first-mentioned ways of the tillage. The power required to shift the center of gravity of the treated layer in respect of both ways ranges from 0.6 ... to 2.0 kW. , while the same index in respect of the combined method of tillage ranges from 0.3 ... to 0.9 kW
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LANDSCAPING RECREATIONAL AREAS FOR WALKING IN A MOUNTAIN FOREST
06.00.00 Agricultural sciences
DescriptionThe aim of this study is the substantiation of recreational zones in the mountain forests for walking tourists. The article contains a functional zoning, design and spatial solution of landscapes of these zones. The aesthetic and recreational value of forests recreational areas increases the implementation of thinning. Implementation of thinning in the territory of the forest zone allocates places for relaxing and walking. This is the basis of functional separation of recreational areas. Coordinates of the objects of recreational areas (inputs and outputs, the center of the composition, toilets, natural monuments, gazebos, crossing trails and wooden sculptures) are determined using GPS satnav. We can determine the spatial composition of landscapes with forest vegetation, relief and water space. This allows you to allocate places for sight-seeing platforms. Small architectural forms must be in harmony with the surrounding landscape. Walking paths form the basis recreation areas. Turns and bends of routes for walking must comply with the elements of the landscape. Areas for recreation are usually located along the trail in of water bodies and in places of disclosure prospects. The recreation area is limited to with an enclosure which fits into the forest landscapes. In this case, the fence should not interfere with of migration of small animals (herpetofauna, insectivores, and others). The harmony of landscape elements serves as a criterion of completion of design. In the recreation area fire prevention measures have to be carried out by tenants. Permissible load of tourists to recreation areas is determined by a special technique. Conclusions: there was proposed a new kind of recreation facilities in the mountain forests - the zone for walking tourists. When carrying out forestry works, there will be a minimum of expenses on arrangement of the zone. Negative consequences to the forest environment would also be minimized
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MATHEMATICAL MODEL OF A MACHINE AND TRACTOR UNIT WITH EDM IN TRANSMISSION OF A TRACTOR
DescriptionThe developed mathematical model of the machine and tractor unit with the elastically damping mechanism in transmission of a tractor is given in the article. The analysis of mathematical model of the arable unit on the basis of a tractor with EDM in transmission showed that the MTU mathematical model can be considered as working