National Repository of Grey Literature 139 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Proposal of a vertical wood splitting device
Ptáček, Josef ; Baláž, Adam (referee) ; Zeizinger, Lukáš (advisor)
This bachelor thesis deals with the research of components, types of structures and the functioning of the whole system in order to design a vertical hydraulic splitting device that uses the hydraulic circuit of a tractor. The theoretical part focuses on the types of structures and drive methods in the introduction. Then the focus is on the design elements and safety in the operation of the vertical hydraulic splitting device. The last chapter of this part is a detailed investigation of the components that are found in the hydraulic circuit of the given structure. The practical part deals with the design of the hydraulic circuit together with its elements. Subsequently, it deals with the design of the structure according to the specified parameters. Finally, a drawing documentation was created, which includes a drawing of the vertical hydraulic splitting assembly, a drawing of the welding sub-assembly of the frame structure and a profile drawing.
Topology optimization of crane hook
Kabelka, Jaroslav ; Pokorný, Přemysl (referee) ; Zeizinger, Lukáš (advisor)
This final bachelor's thesis discusses the importance of topological optimization in solutions with regard to crane hooks. The thesis deals covers the theoretical part and the computational practical part of a specific crane hook. In the theoretical part, in addition to optimization methods, models, boundary conditions and the softwares, various types of hooks, their construction and properties are examined. In the computational part, the thesis then deals with a specific case of topological optimization of a crane hook, followed by validation and comparison of the obtained results.
Modern trends in tunnel excavation using TBM (Tunnel Boring Machine)
Hlaváček, Josef ; Kašpárek, Jaroslav (referee) ; Zeizinger, Lukáš (advisor)
This bachelor’s thesis deals with the current technology of Tunnel Boring Machines (TBM) and with the modern trends emerging in this focus area. The first part is devoted to a general description of TBM and the history of their development. The next part of the thesis deals with the different types of TBM and describes the way how they work and where and under what conditions they can be applied. The focus is also given to the comparison of these machines, distributed based on the environment they are designed for. These machines are as well compared with other tunnel boring methods. Subsequently, the application of TBM technology is analysed both on a global scale and within the Czech Republic. The thesis also discusses the frequency of TBM use in the mining industry and its possible potential in this branch. The last part is focused on the recent and possible future development of TBM.
Hydrogen pressure reduction before injection into the power unit
Švestka, Jiří ; Zeizinger, Lukáš (referee) ; Štětina, Josef (advisor)
This bachelor thesis's central argument revolves around the depressurisation of hydrogen and the pressure regulator required to do so. It explores the journey of hydrogen from its production through distribution to the ways of multiple applications. Specific emphasis is placed on the characteristic properties of hydrogen that need to be taken into account during the design of the reduction valve itself. In this thesis, the design of a high-pressure pressure regulator optimized for piece production is presented, together with an analysis of the dynamics of hydrogen as it passes through the valve.
Mini dumper for transporting bulk material
Sedláček, Tomáš ; Škopán, Miroslav (referee) ; Zeizinger, Lukáš (advisor)
The bachelor's thesis deals with the conceptual design of a minidumper. These machines are primarily used for transporting bulk material in small-scale earthworks. The introductory research describes selected similar devices. The research section serves as a basis for selecting a suitable conceptual solution. In the thesis, the solution of a tracked minidumper with a hydrostatic drive system and a hydraulic tipping of the dump body is selected. Part of the conceptual solution design is the design of the hydraulic circuit. Furthermore, the construction of the tracked chassis and other selected components is specified. The calculation section focuses on machine's drive system and the tipping of the dump body. This section covers the selection of the power unit, hydraulic pump, hydraulic motors and the linear hydraulic actuator. The end of the thesis is dedicated to the strength analysis of the machine's frame. The frame is subjected to strength analyses using the finite element method. Throughout the strength analyses, the frame is modified to enhance its load-bearing capacity. Drawing documentation for the final version of the frame is created. The thesis also includes drawing documentation of the minidumper assembly.
Strength analysis of hydraulic equipment construction
Burian, Martin ; Klezla, Vojtěch (referee) ; Zeizinger, Lukáš (advisor)
This thesis deals with the strength analysis of two tanks of hydraulic power units using finite element method. Introduction consists of a brief description of these units and description of a current solution. An analysis of force effects and load conditions follows. The next part describes the calculation model and then the calculation results. Based on these results to improve mechanical properties, a proposal is made. The attachment of this thesis is drawing documentation. The thesis was created in cooperation with Bosch Rexroth, spol. s r. o.
Conceptual design of a lifting platform for immobile people
Blažek, Jan ; Zeizinger, Lukáš (referee) ; Škopán, Miroslav (advisor)
This bachelor's thesis focuses on the issue of vertical lifting platforms for immobile persons. It describes the applicable legislative regulations for the construction, installation, and operation of these platforms, and analyzes current construction solutions and commercially available devices. The conclusion of the thesis presents an original conceptual design of a vertical lifting platform that meets all legislative and technical requirements.
Belt conveyor for a sorted recyclate
Březina, Ondřej ; Zeizinger, Lukáš (referee) ; Kašpárek, Jaroslav (advisor)
This bachelor thesis deals with the design of a positionable belt conveyor which is part of a mobile recycling machine. The conveyor transports the material at an angle of 30° with a height difference of 1.5 m. The research part focuses on the study of belt conveyors with a higher inclination angle and then characterizes their basic parts. This is followed by a conceptual design of the structure in which the basic components are selected and then subjected to design calculations. Furthermore, a strength check of the structure and a detailed description of the principle of positioning to the working and transport position are carried out. The work includes 3D images of the conceptual model and drawings of selected components.
Belt conveyor for glass shards
Vašut, Jan ; Škopán, Miroslav (referee) ; Zeizinger, Lukáš (advisor)
This work deals with an issue of a belt conveyor intended for the transport of glass shards over a short distance in a perpendicular direction. The goal of this work is to find a design solution for the belt conveyor for specific constructional parameters. In addition to the structural solution, this work also contains a research part that deals with the description of the belt conveyor, the basic structural element and their choice. In addition, this work includes the functional calculation of the belt conveyor according to the ISO ČSN 5048 regulation, the determination of basic sizes, the type of propulsion, the construction of tensioning device and the strength calculation for selected parts. Finally, the work is supplemented by drawing documentation.
Synthetic and alternative fuels for internal combustion engines
Kromp, Miloš ; Zeizinger, Lukáš (referee) ; Böhm, Michael (advisor)
The bachelor’s thesis focuses on synthetic and alternative fuels for combustion engines. Types of fuels, production and distribution processes, and their impact on combustion and engine performance are examined. The work also analyzes the impacts of these fuels on CO2 emissions. An innovative part is the usage of a simulation model of the engine, which allows comparison of performance parameters and emissions when using different types of fuels. This method brings new possibilities for optimizing the use of alternative fuels.

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