Keywords: Screw Amplitude Resonance ConveyorIntroduction. The aim of the article is a mathematical model of vibrations of working part of screw conveyer for transporting friable loads taking into account the changes of closeness of the processed environment, speed of circulation of screw, weight while appearing of the phenomenon of resonance. Materials and methods. It is recesrced the turning vibrations of spiral working part of screw multifunctional conveyer, which appeare as a result of action of processing environment. The recerch was carried out by mathematical modelling method.Results and discussions. The limiting factors which complicate a design are the unevenness of the division of environment along the length of screw; a body makes flexible vibrations; the motion of the processed environment along the working screw causes the small vibrations of bend, causes appearance of "additional forces". For providing the authenticity of mathematical model ti has been introduced the next suppositions: the working part of screw is turned with the permanent angle speed around its longitudinal which in the undeformed position coincides coincides with an axis OX; the transversal transferring of neutral axis of working screw at the arbitrary moment in perpendicular direction of its undeformed position is determined by the vector (in relation to the fixed frame of reference of OXYZ); the continuous stream of processed environment,while its weight changes on unit length slowly along a screw and moves with permanent relative (in relation to working screw) speed.A mathematical model takes into account the limitation and supposition for the existent screw conveyer with the length of 2,5 and 3 m, which is used for moving the friable loads with the consistence of 10, 20, 40 kg/m. The alternative parameters are the length of the screw,the consistence of the processed environment, the speed of circulation ofthe screw , weightOn the basis of model the dependences of amplitude of vibrations on the lengthof screw , cosistence of the processed environment, the speed of circulation of the screw, weight are built.Conclusions. A mathematical model allows to improve the process of development and designing of the screw conveyers of the friable loads providing the reliability of process of transportion and system "the processed environment -the screw working part".
In this article, the problem of the need to improve existing and development of essentially new beet-harvesting machines is investigated since the existing ones do not fully satisfy the agronomic requirements for the process of harvesting roots. The results of experimental studies of the improved beet-harvesting machine are presented. The technological efficiency of application of the improved design of the cutter of the remnants of the wedge was determined by conducting field comparative studies of the two types of denominators, which distinguished themselves from the constructive execution of the comb copier and knife. The surface of the reviews and their two-dimensional sections of the damage to the root crops and the number of cut root crops from the soil were constructed, depending on the speed of the root-crop modulus and the height of the root crops.
The article deals with the analytical and applied model of feeding of cut vegetable components from root crops to the screw conveyor, the analysis of the theoretical level and possible limits of the change of technological feed of the cutter knives built in the screw conveyor. The advantage of the offered mathematical model in comparison with the traditional one is to take into account such factors as the influence of the hips yield in the row, the specific mass of weeds in the row, the density of the root crops planting, the rate of movement of the root crop harvesting machine.Statement of the problem. The difficult and changing conditions of technological operation of the top gathering machines and the lack of adaptation of existing structures of cutting tools to these changes do not allow to obtain constant agrotechnical indices, especially at high yields, uneven arrangement of root crops in the row, unsatisfactory state of tops, fould fields, therefore, the development of the new and improved existing designs of the top gathering machines is needed [1].Analysis of the available researches and publications. Analysis of recent research and publications. The advantage of the offered mathematical model in comparison with the traditional one is to take into account such factors as the influence of the yield of the hips in a row, the specific mass of weeds in the row, the density of the root crops planting, the rate of movement of the root crop harvesting machine. The experimental and theoretical investigations requiring more detailed description and improvement by means of mathematical modeling are presented in papers [2, 3, 4].The objective of the paper is to develop the analytical and applied model of feeding of the cut plant components from root crop heads by the top remover module to the screw conveyor, to analyze and determine at the theoretical level the possible limits of the change in technological feed of the plant components cut by rotary top cutter knives the to the screw conveyor aimed to obtain the analytical functional regularities of the change in technological top feed from the root crop plantating parameters and module operation technological parameters.Statement of the task. To calculate and substantiate the main structural and kinematic parameters and operating modes of the screw conveyor of the top gathering module, to Analytical and applied model of the process of the cut vegetable components feeding to the screw conveyor of the top gathering module 106 …………………………………………………….
Nowadays, the available haulm removing machines and mechanisms do not fully meet the agronomic requirements for the process of harvesting roots. In this paper, the need to design new haulm removers and improve the available ones is substantiated. The results of experimental and theoretical studies require a more detailed description and analysis on the basis of the obtained data during field tests of an advanced haulm removing machine. The technological process of the module operation for harvesting the tops of root crops is primarily regulated; it depends to a large extent on the technological feeding of the plant components cut off with knives of rotary haulm removers. Therefore, the results of experimental studies of the auger conveyor performance are given in this paper. Based on the obtained results, the efficiency of the developed analytical and applied model of the feed process of cut vegetable components to the auger conveyor of the haulm removing module is proved. The discrepancy in the experimental values of the auger conveyor performance (obtained in accordance with the regression equation) and the theoretical values of its performance (obtained at the analytical level according to the mathematical model) ranges from 5 to 10%. The rational parameters of the auger conveyor of the haulm removing module are defined: auger diameter -0,35 m; auger rotational frequency -350 rpm.
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