Центральноукраїнський науковий вісник. Технічні науки. Випуск 7. Частина 1. - 2023
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Item type:Item, Вибір параметрів ущільнення макета конструкції з листовим склом(ЦНТУ, 2023) Портнов, Г. Д.; Дарієнко, В. В.; Пукалов, В. В.; Portnov, Н.; Dariienko, V.; Pukalov, V.В роботі представлена методика обґрунтування вибору параметрів світлопрозорої конструкції, що включає прямокутну скляну пластину, пружне ущільнення та жорсткі рамки на основі дослідження моделі в середовищі ПК SOLIDWORKS. Показано, що параметри закріплення листового скла, включаючи характеристики ущільнення суттєво впливають на механічні властивості конструкції. Розроблена модель дозволяє оцінити напружено-деформований стан листового скла та динамічні властивості конструкції залежно від параметрів пружного ущільнення. Sheet glass is used in the creation of transparent constructions of building structures, for glazing of airplanes, helicopters, boats, as a structural material for instrument and aggregate construction, production of technical products in mechanical engineering. Structures made of sheet glass include fastening devices with sealing elements. Calculations of such structures cause difficulties, which are associated with the imperfection of their mathematical models. For the preliminary selection of the main parameters of the newly developed structures, it is advisable to use calculation software complexes with the preliminary development of the method of choosing the structure of fixing the glass sheet, taking into account the main sealing parameters according to the results of the study of the structure model. The nature of the stress state of the plate depends mainly on the type of load and the nature of its distribution, the ratio of the long and short sides to the thickness of the sheet glass, as well as the clamping parameters. The assessment of the stress-strain state of the structure is carried out according to the criteria of strength, rigidity and based on the study of dynamic characteristics. The calculations are reduced to justifying the choice of structural parameters of sheet glass, caliper and rubber sealing material, taking into account the stressdeformed state of the structure, operational, structural requirements and economic indicators. The paper presents a methodology for substantiating the selection of the parameters of a transparent structure, which includes a rectangular glass plate, elastic sealing and rigid frames based on model research in the SOLIDWORKS PC environment. It is shown that the parameters of fixing the sheet glass, including the sealing characteristics, significantly affect the mechanical properties of the structure. The developed model makes it possible to estimate the stress-deformed state of sheet glass and the dynamic properties of the structure depending on the parameters of the elastic seal.Item type:Item, Удосконалення технології розбирання металоконструкцій механізованого шахтного кріплення(ЦНТУ, 2023) Боков, В. М.; Сіса, О. Ф.; Мірзак, В. Я.; Телюта, Р. В.; Пукалов, В. В.; Bokov, V.; Sisa, О.; Mirzak, V.; Teliuta, R.; Pukalov, V.Запропоновано технологію для розбирання металоконструкцій шахтного кріплення, що дозволяє замінити фізично важку та небезпечну працю оператора на більш легкий, механізований процес з використанням потужного гідравлічного біпреса. During operation, the hinge connections of mine supports practically stop rotating. This is due to the fact that, as a result of the aggressive mine water and strong dustiness, the diametrical clearance of 1-2 mm between the axis and the bushing is tightly filled with oxides and coal dust, especially in the connections of the base. This circumstance leads to the fact that the axes (pins) in the hinges lose their mobility and require significant effort for their dismantling. To repair the mechanized mine support, it is necessary to dismantle the hinge connections, which are formed by axes and holes in levers (traverses), base ears, and overlaps. Currently, the dismantling of hinge connections of mine supports is carried out using manual impact tools. This operation is extremely labor-intensive, physically heavy, and belongs to hazardous work. The goal of the study is to improve the working conditions of the operator during the dismantling process of axes in hinge connections of mine supports by using a mechanized specialized hydraulic press. To achieve the set goal, the following tasks must be solved: to determine the maximum permissible disassembly force of the axes, taking into account the strength of the load-bearing structure elements; to develop a concept of a mechanized hydraulic press, including the composition of the installation, the general technical description, the principle of operation, the kinematic scheme, and the tool. Studies have been carried out on the deformation modeling of mine support elements under load using the SOLIDWORKS Simulation calculation module to determine the maximum permissible disassembly force of the axes. It has been shown that the disassembly load of the shaft support axis with a force of more than 1000 kN leads to the loss of the structural strength reserve, which is unacceptable. An effective technology for dismantling the axes of a mechanized mine support has been proposed. A concept of an original specialized hydraulic press "Kit-100" for dismantling axes has been developed, which allows replacing the physically heavy and dangerous work of the operator with a lighter, mechanized process.