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Design of coaxial high-speed gear reducer
Neklapil, Libor ; Ing. Tomáš Hubáček, Ph.D (referee) ; Bradáč, František (advisor)
The thesis deal with design of coaxial high-speed gear box for small-scale turboshaft engines. At the beginning a study of problems was performed and for design concept was elected version of single-shaft turbo-engine with electric generator. Kinematic diagram, type of gear design, material and lubrication method was designed. Further was solved proposal of basic gearing parameters, choice of the number of tooth and basic proposal calculations were performed. Was performed check calculation of gearing, calculation of bearings durability and was processed design documentation in required range. Designed gear reducer has two stage with three coutershafts, that are deployed evenly about main axis of reducer. First stage is gear with external gearing, second stage with internal gearing. The thesis may be used as a template for next similar gear reducers design.
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The footbridge for pedestrians and cyclists
Pupík, Antonín ; Sýkora, Karel (referee) ; Puchner, Josef (advisor)
This thesis deals with the design and assessment of footbridge for pedestrians and cyclists in the city of Hranice, Rybare district. The footbridge will serve as a crossing point over the river Bečva and will conect cycling trail with the street Rybarska. The content of this paper is to propose two different variants of structures. One of these options is selected based on their economic evaluation and further processed. Length of the bridge is 50m.
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Survey and Assessment of highway D2 Bridge
Výpustek, Libor ; Suza, Igor (referee) ; Cikrle, Petr (advisor)
This thesis deals with the exploration and evaluation of the existing bridge carried him on the highway D2. The work is divided into theoretical and practical parts. The theoretical part focuses on the technical surveys, diagnosis of building structures and some methods of investigation and testing of building structures. In the practical part the visual inspection and diagnosis of disorders of the highway bridge substructures ev. No. D2-058, to determine material characteristics substructure and evaluate the state of the bridge. In conclusion, the practical part of the recommendations for the design and method of repairing the bridge.
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Diagnosis of mechanical vibrations in asynchronous motor origin
Dostál, Martin ; Dostál, Lukáš (referee) ; Janda, Marcel (advisor)
Every machine needs to be maintained and controlled, if may work reliably during they service life. Big part of service life of expensive machines are those machines in operation. Vibration diagnostics is type of analysis, that doesn’t need removal of rotation machinery. The vibration, that are created by running machinery, are used as source of information about mode of operation. This master’s thesis contains theoretical analysis of vibration diagnostics and vibration measurements of a particular machine. This thesis contains 3D models of bearings and rotor asynchronous machine, which are created by software Autodesk Inventor 2014. Bearings vibration analysis of this models is performed by software Ansys Workbench.
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Worm conveyor
Sedláček, Martin ; Jonák, Martin (referee) ; Malášek, Jiří (advisor)
This bachelor thesis deals with calculation and construction of worm conveyor for slightly sloping transport. The whole work is divided into two main sections, which include structural and textual parts. The text contains analysis of option for single parts of conveyor, functional and strength calculations, which are necessary for proposal of worm conveyor. The structural part includes mechanical drawings, which consists of drawing of configuration and drawings of details for worm shaft.
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Optimalization of Temperature for Semi-hot Forming of Roll Bearings
Hrouzková, Andrea ; Klakurková, Lenka (referee) ; Doležal, Pavel (advisor)
This bachelor's thesis solve the problems about optimalization of temperature for semi-hot forming of roll bearings steels. The purpose of this thesis is finding the optimal interval of temperatures, in which 100CrMnSi6-4 bearing steel shows good strain and deformation characteristics after forming. Methods for data evaluation of mechanical properties are the tensile and upsetting tests which were performed on higher temperatures. It was microscoped microstructure changes of the bearing steel 100CrMnSi6-4 during temperature influence and classification with the light microscope.
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Mounting frame structures of production and warehouse complex in Paskov
Gaďurek, Robin ; Nečasová, Barbora (referee) ; Vlčková, Jitka Laura (advisor)
The content of the submitted thesis is the implementation of a reinforced concrete skeleton assembled in Paskov. This is a manufacturing and warehouse facility Italinox. The work contains a comprehensive technical report, technical report transport relations, bills of quantities, two technological regulations, two control and test plans, design of mechanical assemblies, and health and safety. The appendix contains drawings framed construction and piloting, budget, schedule, drawing of the site.
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Kontrola technického stavu mechanizačních prostředků pomocí termokamery
HALÍŘ, Vladimír
Main topic of this research is possibility of use the infra-red radiation of materials for purpose of machine diagnosis in agricultur machinery. Non-contact method of temperature monitoring is possible with special camera called infravision camera. With this device is possible to scan surface temperature of monitored object. Output of this scan is called thermogram. For users are values of scan then shown in false colors that are corresponding with a surface temperature of an object. In agricultur machinery the use is where the prerequisite for high increasing friction is converted into heat. Abnormal increase in the operating temperature can then be attributed to different severity of value and used as an indicator of the degree of wear for a possible future state of failures. The result of this research is a summary description of the factors that influence its impact on technical parameters of machine parts. The principles for the proper capture of thermal images, so-called thermograms, and procedures appropriate for their evaluation are described to. Theoretical assumptions are practically tested for the use at normal operating diagnostics of machines and their components.
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Modal and spectral properties of the rotor on permanent magnet bearings
Kozánek, Jan ; Scopel, D. ; Svoboda, R. ; Šafr, M.
In this article the spectral and modal properties of the rotor on contactless bearings are investigated. The dynamic behaviour, especially the eigenfrequencies and corresponding modes have been calculated in two different ways, by the FEM ANSYS software in the Institute of Thermomechanics and by the program DYNROT in TECHLAB company. The importance of this analysis is supported by the fact that the first non-rigid body resonance is not far from the working rotation speed 40 000 rpm .
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