05.00.00 Technical science
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VIBRATING TOOL FOR SOIL TREATMENT
DescriptionOn the basis of the analysis of existing technical means for tillage in this article we propose a new technical means of vibration action including rectangular welded rack with hinge systems, adjusting the depth of tillage. Fixing of the working bodies and working bodies are made in the form of racks with chisels and arrow-shaped claws differ in that there is a shaped hole is made in the upper side of rack where a mounted solenoid is. It is mounted on a rack by means of casing and screws, and the solenoid is made in the form of a coil with a head and spring and communicated with the electrical system of the tractor via the relay-breaker and a regulator are located on the rack. This vibrating tool presumably will lessen the resistance of the soil affecting on the working bodies, will eliminate the sticking effect of elements of working bodies and thereby the quality of the soil tillage will be improved, it will allow to reduce energy consumptions of working process up to 30%, it reduces the emission of harmful substances from combustion of diesel fuel into the atmosphere. The invention relates to agricultural engineering and can be used for tillage on various agricultural backgrounds and with different densities
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METHODS OF CHOOSING DIAGNOSED VEHICLE PARAMETERS IN AGRICULTURE
DescriptionThe article presents an analysis of the existing approach to automobiles technical maintenance in agriculture. We have pointed out that in modern conditions it is impossible to forecast the automobiles maintenance operation frequency and as a result its improvement as well. It is obvious that one cannot achieve the considerable increase of maintenance operation efficiency by separate means and there exist the necessity to treat it as a system and use the up-to-date methods to investigate and improve complicated systems. We have made a conclusion that the increase of maintenance operation efficiency is not possible without some rational strategy of maintenance operation and repair. We have shown that the program of maintenance operation and repair being an integral part of automobiles technical maintenance has considerable effect on maintenance and repair quality. As a result, there is some necessity of the developed system of parameters diagnosing and control in technical maintenance and repair. We have shown that to get sufficient diagnose information one needs selection of the controlled parameters which give maximum information about the object technical status taking into account possible characteristics of its operational faults. We have discovered that in order to solve the task it is necessary to have the object’s information pattern, calculation of possible characteristics of the controlled object being in good or bad order due to some parts fault, evaluation of information brought by every parameter and determining parameters to be diagnosed. We have proposed to evaluate the parameters’ information value with the help of information entropy as uncertainty measure that is one of the main concepts of the information theory. Because of solving the task, we have got the aggregate of the controlled automobile parameters orderable according to the amount of information
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THE BASICS OF CALCULATING THE PROBABILITY OF FAILURE-FREE OPERATION OF SUPPLY BUSES AND BUS SECTIONS
DescriptionIn agriculture, the high reliability of electricity supply is necessary because of its main feature production is associated with biological objects. The change in the state parameters can lead to a sharp decrease in the productivity of the biological system or, in general, to the death of it. The following enterprises are particularly critical to the reliability of power supply: dairy farms, hothouse complexes, incubators, grain storage sites, finished products and much more. The article presents: models of failure of switchable busbar, models of failure of supply buses; formulas for the calculation of reliability indicators, the calculated values of the probabilities of failure-free operation of individual elements, analysis of the values obtained, conclusions were made on the models presented and suggestions were made for introduction into production, energy conservation was associated with reliability of electrical installations
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APPROBATION OF THE SUBSTANTIATION METHODS OF THE INTERNATIONAL TIMBER TRANSPORTATION PROCESS
DescriptionModern small logging enterprises exporting timber primarily by lorry transport do not have resources for implementing research that contributes to reducing the cost of this type of transport. Besides, there is no universal and accessible planning methodology and operative decision-making in the organization of timber export by lorry transport. Because of this, the author of the article has proposed a methodology for improving international timber transportation by timber trucks. This methodology contains logging modeling simulation, as well as analysis and contain of different options of logging. Within the framework of this methodology, a unique model based on the discrete event simulation has been developed. This model simulates a full cycle of timber transportation from the terminal to several foreign consumers. The working capacity of the model was verified by simulating several export scenarios based on data obtained during field study at one of the logging enterprises, the annual logging volume of which is 400 thousand cubic meters. The analysis and comparison of the modeling results have confirmed the possibility of using this methodology in planning and organizing international timber transportation for small logging enterprises
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OPTIMIZATION OF THE PARAMETERS OF WORKING PARTS FOR THE PREPARATION OF TOBACCO LEAVES TO DRYING
DescriptionIn the article there are results of theoretical and experimental researches on creating a working part for leafsplitting and orientation of tobacco leaves when preparing for their drying
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IMPROVEMENT OF A MULTILEVEL SYSTEM OF TRANSPORT LINKS OF FOREST ENTERPRISES AT THE REGIONAL LEVEL
DescriptionThis article considers the structure of the regional transport system of the forest complex, in which each mode of transport is characterized by a certain structure, technology of functioning and means. To describe the relationship between the parameters that determine the activity of a particular mode of transport, the production function method is used. Analytical dependence expressing the formal relationship between the parameters of various modes of transport is presented, the objective function of the organizational structure of the regional transport system management is presented, reflecting the efficiency of the entire transport system as a whole. The formulation of the problem is considered from the standpoint of game theory, in which there are four players with disparate interests: the organizational structure of the regional transport system and the three transport subsystems, each of the participants has its own control vector that belongs to the given set. We consider the case of full awareness, in which the hierarchical structure and all the objective functions of the system are known to the participants. The resulting statement of the problem is modeled by the game of four persons with conflicting interests. The game is viewed from the perspective of transport subsystems. To describe the relationship between the parameters that determine the activity of a particular mode of transport, the production function method is used. An algorithm for solving the problem is given
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Description
Today, the Russian agriculture is facing food market saturation task by domestic quality products in sufficient quantities for the needs of the population. At the same time healthy nutriment is provided, according to doctors and scientists, by vegetables, which must be present in the diet of a healthy person. In this regard, a big role is assigned to the covered ground crop production, normal functioning of which allows to supply shops and markets with vegetables throughout the year. For the formation of the necessary environment inside the greenhouse promoting normal plants growth, the main role is played by the solar radiation penetrating into the greenhouse through the transparent enclosure and creating necessary light and temperature and humidity regime. Comparison and analysis of the main cover and light-transmitting materials (film, glass, polycarbonate) characteristics revealed polycarbonate to be the basic material today, light transmitting characteristics study of which this article deals with. As a research method, molecular optical spectroscopy was applied. In order to study there has been selected waveband with their length value from the 610 to 700 nm, which spans exactly the shortwave part of the solar radiation spectrum, which is necessary for the proper implementation of the plants photosynthesis in artificial rearing conditions. After analyzing the measurements results it can be said that studied "KARBOGLASS AGRO" polycarbonate samples, despite the substantially greater thickness in comparison with for example plastic film that is widely used in the old fashioned way, are characterized by higher value of light-transmitting ability for light wavelength values passing through the material - respectively of 79-80,4% and 75,4-77%. Light transmission of "KARBOGLASS AGRO" cellular polycarbonate is at 5 ± 1% higher than of other traditional materials. Among the studied coating materials for covered ground facilities and due to the research results of their light-transmitting capacity, today cellular polycarbonate is of undoubted advantage
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DEVELOPMENT AND CALCULATION OF STRUCTURES OF A HEAT EXCHANGER
DescriptionThere are the results of the research on creating a heat exchanger. It is based on the experience of creating equipment for swirling of liquid and gas flows and changing of their directions, their whirling, leading to destruction of the boundary layer on heat-transfer surfaces and intensification of heat-exchange processes. Screw rotors are suggested as working bodies of the heat exchanger. Each flow-cross section in them differs from the previous not only by its form but also by its location relative to each other. With that, the cross-section area changes, the medium motion stationary breaks, the intensity of heatexchange processes increases, technological capabilities enhance. Screw rotors are supplied with laps created on exterior surfaces of rotors during their assembling and allowing intensification of heatexchange processes. Dependencies for calculating of screw rotors basic characteristics are presented in the work. Screw rotors provided with helical grooves on the inner surface with a spiral lines on the outer surface of different pitch and number of visits. The work is done on the basis of research carried out at the Kuban state agrarian University on the use of helical rotors in industry, construction and agriculture [1-23]
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MATHEMATICAL MODELING OF SPECIAL ELECTRIC DRIVES FOR THE EQUIPMENT OF OIL AND GAS BRANCH
DescriptionCreation of new types of special electric actuators for the oil and gas industry implies development of new approaches to simulation, design of the considered types of electric actuators. In addition, it requires development of new algorithms for creation of a complex of application programs of computer-aided design of special electric actuators. As process of simulation is quite labor consuming, it is offered to realize it gradually. In this article, the question of mathematical simulation of special electric actuators for the equipment of oil and gas branch using methods of electromagnetic conversion of energy is considered. Results of mathematical simulation were realized in the form of the program products, which are a part of system of computer-aided design
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Description
The influence of auto-displacement in a resonancetunnel diode (RTD) on the dynamic range of amplifiers on these diodes is considered in the article. The amplification at resonance frequency is considered and the influence of higher harmonics is not taken into account, since they do not create a significant voltage drop at the nonlinear resistance of the diode. It is assumed that the gain will be sufficiently large, and then the nature of the dependence of the gain factors on the degree of regeneration will be the same for amplifiers "per pass" and "reflection". This allows us to consider the problem for both types of amplifiers on the RTD. The types of amplitude characteristics , which are possible for the RTD amplifier, are considered. The dependences of the parameter determining the dynamic range of the amplifier on the position of the operating point for several values of the product of the resistance on the direct current of the supply circuit are calculated for the value of the modulus of the maximum negative conductivity of the tunnel gap RG max. For each value of RG max for given parameters, you can determine the position of the operating point, which provides the specified amplifier mode. Dependences of the value of the dynamic range are constructed with allowance for auto-displacement and in the absence of auto-displacement for two values of the degree of regeneration. Taking into account autosplacement, two possible types of amplitude characteristics and boundaries of their existence were revealed. For these two types of amplitude characteristics, expressions were obtained that determine the dynamic range of the amplifier