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Analýza technických parametrů převodových ústrojí traktorů
Kosík, Tomáš
Bachelor thesis focuses on the analysis of the technical parameters of transmissions for tractors. The introductory part of this work deals generally with transmission devices as such and their related systems. It will be pointed to the importance of selecting the correct transmission device for a given application, as well as to the importance of this device properly construct and dimension. Next there is discussed the basic structural design of transmissions and will put their advantages and disadvantages, along with an explanation of the structure and principle of operation of these systems. Furthermore, this work deals with the parameters used for calculating technical parameters transmissions. And lastly, they will be compared to the selected solutions of different transmissions from different manufacturers. At the conclusion of this work are summarized findings from previous points.
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Design of wind power plant
Starý, Ondřej ; Dlugoš, Jozef (referee) ; Řehák, Kamil (advisor)
Renewable energy sources are currently a much-discussed issue. One of the possibilities of their use is the production of electricity using wind power plants. This work therefore describes in detail construction of wind turbines. At the same time, there is a brief evaluation of wind power plants, from an energy and economic point of view. Part of the work is also the calculation of the optimization of the gearbox weight and a description of the design of the wind turbine coupling.
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Modifying the Babetta engine
Poulíček, Matěj ; Píštěk, Václav (referee) ; Kaplan, Zdeněk (advisor)
This bachelor thesis is about one of the possible modifications of two-stroke single-cylinder Babetta 210 engine for increasing of power. Further about another manufactured Babetta engines with focus on their pros and cons. Attention is paid also to possible design changes for elimination of drawbacks.
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Stroke mechanism of bridge crane
Jirásek, Jiří ; Kašpárek, Jaroslav (referee) ; Škopán, Miroslav (advisor)
This bachelor thesis deals with the design of the lifting mechanism of the crane cat, for a bridge storage crane with a load capacity of 8,000 kg. The thesis contains a critical research of similar existing solutions and the selection of the appropriate concept. The design includes calculations of the basic parameters of the stroke, and based on them selects appropriate rope, pulleys, and design of the rope drum. Furthermore, there are calculated and selected suitable components of the stroke mechanism such as electric motor, clutch, brake and gearbox. The last part deals with the design of the bearing, the drum pin and the calculation of the shaft key. The output of the work is the technical drawing of the whole assembly of the mechanism and the welding subassembly of the rope drum.
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Automobile clutches
Kundýsek, Michal ; Píštěk, Václav (referee) ; Kaplan, Zdeněk (advisor)
This bachelor thesis provides an overview of the various types of clutch and starting clutch technologies, before offering a detailed analysis of the friction clutch system. It addresses the relative merits of this particular type of clutch and concludes with a discussion of its contemporary automotive applications.
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Influence of physical parameters and age of power lines on PLC/BPL performance and reliability
Benešl, Lukáš ; Sláčik, Ján (referee) ; Mlýnek, Petr (advisor)
BPL technology is quite widespread nowadays and the public is also somewhat aware of it. This technology can be used as a means of communication without the need to install additional media and thus use the existing infrastructure. In an effort to use the full potential of the technology, BPL communication began to be used to monitor the current state of cables in distribution networks online. Where the technology is already fully implemented, the distributor can use the data to evaluate the current situation. In this way, BPL technology can be used as a diagnostic tool to test the quality of a cable connection on which not only time but also humidity and other external influences could have a significant effect.
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Concessive connectives pourtant, cependant, toutefois, néanmoins, quand même, tout de même in French
Štěpánová, Veronika ; Nádvorníková, Olga (advisor) ; Mudrochová, Radka (referee)
Key words: connective, concession, concessive adverb, concessive connective, compétition Abstract: The diploma thesis "Les connecteurs concessifs pourtant, cependant, toutefois, néanmoins, quand même, tout de même" consists of three parts. The goal of the first part was to explain the notion of "concessive connective" (connecteur concessif) in a synchronic perspective. This first part consists on one hand in an attempt to explain the concessive relation (concession), on the other in a definition of the category of concessive connectives used in temporary French. The second part of this diploma thesis is dedicated to a diachronic and quantity-based study of the examined quasi-synonyms for the purpose of clarification of their frequency and competition regarding their usage down to the present day. In addition to these two parts, we reflect in the third part on the current use of concessive connectives, i.e. their use in contemporary written, spoken and pseudo-spoken language (on the Internet).
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Stroke mechanism of bridge crane
Ujčík, Miroslav ; Malášek, Jiří (referee) ; Škopán, Miroslav (advisor)
This thesis deals with the design of a stroke mechanism of the bridge crane with capacity of load 12 000 kg, which will have served as a plant crane with regular use. The first part of this thesis is devoted to the critical research of similar existing solutions, on the bases of which a suitable order of the arrangement is chosen. The other part of the thesis is devoted to the calculation of the main dimensions of the stroke, on the basis of which the individual components are selected, this are hoist elements of the rope system, such as roller, rope and rope drum, in which the fatigue calculation is performed. Another part of the thesis tackles design and parts calculation of the lifting mechanism, such as electric motor, clutch, brake and gearbox. The final part of the thesis is devoted to the calculation and control of the drum flail, bearing and tension calculation of the parallel key. Constituent part of this thesis is also drawings´ documentation, which enclosed drawing of the lifting mechanism assembly and the welding subassembly as well.
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Design of test rig for long-term testing of couplings intended for railroad applications
Machálek, Ondřej ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
The master thesis deals with design of test rig for long-term testing of coupling appointed to railway vehicles. At first, there is made a brief research which is related to railway coupling used for transmitting a torque. This is followed by an analysis of the most used power devices to derive real loads conditions of tested couplings. There is chosen the most appropriate conception based on made analysis and it is followed by the description of designed components. There is made a verification of modal properties non-purchased components which is necessary part of the thesis. Numerical modal analysis was performed in ANSYS Workbench software. In the end of the thesis there are included stress-strain analysis of the chosen designed components.
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The Process of Acquiring the Linguistic Concept of Conjunction by Primary School Pupils
Martáková Styblíková, Jana ; Hájková, Eva (advisor) ; Höflerová, Eva (referee) ; Čechová, Marie (referee)
Title: The Process of Acquiring the Linguistic Concept of Conjunction by Primary School Pupils Author: Mgr. Jana Martáková Styblíková Department: Czech Language Department Supervisor: doc. PhDr. Eva Hájková, CSc. Abstract: The dissertation deals with the issue of acquiring the linguistic concept and the term of the conjunction by primary school pupils of 1st-5th, works with children's preconceptions in the language area and introduces how the pupils of the first grade of the elementary school work with the term conjunction. It maps the cognitive processes of pupils in the context of the acquisition of the conjunction language phenomenon and the important moments in which the primary child preconception changes into the language term in the pupils mind. Introduces with the process of conceptualizing the language reality, in which he detaches from the naive child concept of conjunction to the specific linguistic term of a conjunction as a verbal type. It describes the individual parts of the research, in which the individual thought movements of pupils in the area of linguistic gripping of the term conjunction are gradually transformed. It presents the individual research methods as tools by which we monitor the development of the preconception of the conjunction in the linguistic concept. Managed interviews...
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