Žilinská univerzita v Žiline
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Item Koncept vrtuľového propulzora pre široký rozsah rýchlosti letu(University of Žilina, 2024) Ivan, Jakub; Čerňan, JozefThis thesis is focused on creation of propeller concept for wide range of flight speed. The part, which is discussed in the thesis is creation of design for blade motion mechanization, that can reach variable diameters. Apart of creation of this design, the thesis offers historic overview of propeller development throughout the years. Mechanization is designed in 3D environment. The software used for design is Autodesk Inventor. Design isn´t calculated of given engine. The outcome of this thesis is to give perspective for constructers, whoever would want to construct this idea in reality, not 3D environment only. The design in 3D environment is working as it should and when motion is launched, blades are really changing the diameter. In the design study, radius difference between extended and reduced blades is more than 300 millimeters. Desing complies with the task.Item Návrh hybridnej pohonnej jednotky pre experimentálny letún Straton D7(University of Žilina, 2024) Longauer, Oliver; Čerňan, JozefThe aim of this article is designing hybrid power unit for the needs of experimental aircraft Straton D7. Article describes different options of hybridization of power units on basis of their architecture and the function of electric component in relation to the whole power unit. Compares different designs of automotive and aircraft solutions of hybridization of power units. After that, article offers solution for hybrid engine of Straton D7 on basis of gained theoretical knowledge, comparison of shown conceptions and basic calculations, with the needs and predispostion of the original aircraft in its best interest.Item Human-Centric Design: Improving Workplaces for People in Production and Logistics Systems(University of Žilina, 2024) Zuzik, Ján; Biňasová, Vladimíra; Furmannová, BeátaThis study aims to determine the position of workers in the design of production and logistics systems. This article deals mainly with the role of humans in production systems. The introduction of this article is dedicated to the development of ergonomics in production and logistics systems. Furthermore, this article deals with the literary research of the subject matter to find out the analysis of the current state of the issue of the solution in the world. The very core of the study is the position of a person from an ergonomic point of view in production and assembly systems and, in particular, methods of relaxation of employees in production sectors.Item Analýza vplyvu konštrukčného riešenia batériového packu na chladenie batérií počas prevádzky(University of Žilina, 2023) Hlbočan, Peter; Csuka, ZoltánThe contribution is focused on the analysis of some possible approaches to the design of air cooling of the battery pack. The battery pack is equipped with a separate fan. As part of the analysis, the influence of the location of the fan in the pack and the direction of the cooling air flow on the cooling effect and the temperature field during operation were assessed. The result of the analysis is a specific recommendation for the location of the fan in the battery pack and the design of the air flow direction.Item Konštrukčný návrh rámu korby pre jednonápravový príves za traktor(University of Žilina, 2023) Dižo, Ján; Blatnický, Miroslav; Ishchuk, Vadym; Molnár, Denis; Kurtulík, JakubThis article is focused on the results of the research, which is intended to design of a single-axle tipping tractor trailer. The trailer consists of two main parts, a frame and a superstructure. Both parts of the trailer must undergo strength analyses under determined loading conditions. While results of strength analyses of the frame were already presented on the previous event, this work shows an overview of the strength analysis of the tipping superstructure of the trailer. The structure has been analysed under static loads and dynamical effects have been considered by means of a dynamic coefficient. The task has been performed by application of the Finite Element Method (FEM). Some chosen load cases have been analysed and the distribution of stresses in the structure has been evaluated. Results have shown that the designed structure of the tipping superstructure is able to withstand the given loads and it can be used in practice.Item Návrh elektrického mechanizmu otáčania výložníka stĺpového žeriava pre manipuláciu s kalovými čerpadlami(Žilinská univerzita v Žiline, 2023) Blatnický, Miroslav; Dižo, Ján; Molnár, Denis; Ishchuk, VadymThe article is a continuation of the issue of the technical solution of the hinge for handling sludge pumps in the Jaslovské Bohunice nuclear power plant. The main goal is the design of the electric jib rotating mechanism. It was based on the previous proposal for placing the boom consisting of a dimensional calculation of the new support column and the proposal for placing the boom on this column. The save consisted of two bonds. The upper support of the boom was solved using a rolling bearing fixed in the upper part of the column. The bottom bearing contains an axial plain bearing and a fixed gear as part of the rotating mechanism. In the next step, it is necessary to design the attachment of the selected electric motor with a planetary gearbox and a pinion for this construction. The priority in the design will be mainly to observe the axial distance of the gears, but also to consider the mounting method given by the manufacturer and the torque generated by the engine. A holder in which the motor is attached and then attached to the structure will be designed. Thanks to this, the axial distance will be fulfilled. In addition to supporting the motor, the holder also serves as a radial bearing lock, preventing the bearing from being accidentally pulled out. The result of calculations and designs will be 2D diagrams and 3D visualization of the new construction.Item Konštrukčný návrh mechanizmu skrutkového manipulátora turniketu sypkých materiálov(Žilinská univerzita v Žiline, 2023) Molnár, Denis; Blatnický, Miroslav; Dižo, Ján; Ishchuk, VadymThe article is the next step in the ongoing research regarding the incorporation of the proposed bulk material turnstile assembly into an existing production line serving the food industry for bagging powdered milk. The main goal of this contribution is the presentation of the structural design and related technical calculations of the screw manipulator as part of the turnstile for loose materials. The proposed mechanism will enable precise manipulation of the turnstile, especially when it is necessary to clean the pipe connected to the turnstile. Such handling is relevant nowadays due to increasing the safety of maintenance of machines and equipment and due to reducing the physical load of maintenance workers. The results prove the appropriateness of the use of the given structural design and are the basis for further research in the given area. The results will be implemented in the form of boundary conditions for the numerical analyses of the connecting elements of the frame carrying the entire carriage with the turnstile (the frame forms a path for the carriage) and also for numerical calculations of the frame itself. The goal is to achieve a state where the entire structure is safe for the operator during maintenance and also for its surroundings during normal operation.Item Конструктивные особенности современных горных велосипедов, часть 3.(Žilinská univerzita v Žiline, 2023) Дижо, Ян; Блатницкий, Мирослав; Васильевич Ищук, Вадим; Молнар, Денис; Солчанский, Себастьян; Плайдичко, БорисMBT bikes (or mountain bikes) are widely used bikes, which serve the most often for sport purposes. These bikes are produced in more variants and they differ by several signs. There are dimensions, weight categories, used accessories and others. Together with this, there are different technical solutions, which make them different to each other. Usually, it refers to technical solutions of suspension system of a rear wheel of also a front wheel. A rear wheel can be suspended by different systems, which lead to different characteristics are provide different riding properties. This contribution presents an overview current technical solutions of these systems.Item Conceptual design of the training aerobatic airplane(University of Zilina, 2021) Klein, Vladimír; Škultéty, FilipPaper deals with the issue of conceptual design of a training aerobatic aircraft with a tandem arrangement of seats. The first part of the paper is devoted to the historical context of the construction and characteristics of training aerobatic aircraft. The work analyses the current state of training aerobatic aircraft together with the situation of aerobatic aviation in Slovakia. The practical part of the paper discusses the design of a training aerobatic aircraft in the software Rhinocerostogether with the determination of technical and operational parameters and analysis of aerodynamic and stress characteristicsItem Design optimization of a compressor stage with counter-rotating rotors(University of Zilina, 2021) Šajbanová, Kristína; Čerňan, JozefThe paper deals with the design optimization of the compressor stage with counter-rotating rotors, especially in order to create a model which, due to its parameters in real operation, would achieve the maximum possible values of efficiency. The primary goal of this work is to create a design of a compressor stage with counter-rotating rotors from a theoretical point of view. The compressor stage model is created using Inventor modelling software and the subsequent design evaluation and optimization is based on airflow analysis of the compressor stage using Ansys Discovery Live software. The secondary goal is to point out the existence and application of innovative and progressive technology of rapid prototyping in the world of aircraft component production and at the same time to emphasize its benefits in comparison with conventional production techniques applied in the initial stages of aircraft component production.