|
|
Travelling and lifting mechanism
Folprecht, Michal ; Malach, František (referee) ; Malášek, Jiří (advisor)
The main goal this thesis is presenting solution for manipulation with chopper BELL between of hangar and landing zone. The main task is design useful construction solution by required task, also perform a strenght calculations each part of mechanism and drawing documentation. Also included is a 3D visualization of the entire mechanism.
|
|
| |
|
|
Construction of workout machines, their mechanisms and use in practice
SVINTEK, Lukáš
In the introduction of the diploma thesis, a current view of the issue of strengthening and strength machines is given. In the theoretical part, a general overview of the solved problem is made from available information sources. In the practical part, machines are divided according to various criteria with a focus on the most used machines. Then the work focuses on the construction of selected types of strength machines, safety features and sources of load forces. The next part consists of research in the form of a questionnaire intended for fitness centers. Based on the answers, a proposal to improve the problematic parts. This is followed by testing of the proposed design variants on a test device. The conclusion of the work is a summary of the facts found and their interpretation.
|
|
|
Design of the Parking Brake Mechanism
Hagara, Adam ; Řehák, Kamil (referee) ; Prokop, Aleš (advisor)
The main goal of the presented diploma thesis is the design and solution of the design of the parking brake mechanism. The theoretical part is devoted to a more detailed description and analysis of the current parking brake mechanisms, specifically the ratchet parking brake mechanism located in the automatic vehicle transmission. The starting point for the practical design part of the thesis is the preparation of conceptual designs together with determination of the most suitable and optimal concept of the mechanism. The next step is the detailed development of the chosen concept, which is accompanied by a series of calculations of individual components while complying with the given requirements. Subsequently, the functionality of the mechanism itself is verified using dynamic analysis, while individual verification states are verified and evaluated. At the end, the FEM analysis of the relevant components of the parking brake mechanism is also performed in order to confirm functionality, while based on the results, the optimization of the geometry of the relevant components is subsequently performed. The thesis also includes a drawing documentation attached in the annex of the thesis.
|
|
|
Study of molecular weight and configurational stability of substituted polyacetylenes
Trhlíková, Olga ; Sedláček, Jan (advisor) ; Netopilík, Miloš (referee) ; Žigon, Majda (referee)
3 ABSTRACT Complexes [Rh(cycloolefin)(acac)] (cycloolefin = norborna-2,5-diene, cycloocta- 1,5-diene and cyclooctatetraene) were investigated as catalysts of polymerization of monosubstituted acetylenes into stereoregular cis-transoid polyacetylenes. All complexes were highly active in arylacetylenes polymerizations in both coordinating and non-coordinating solvents. Selection of solvent and cycloolefin ligand of the catalyst allowed the control over polymer MW. The onset of initiation in the [Rh(cycloolefin)(acac)]/monomer systems proceeded as the proton transfer from the monomer molecule to the acac ligand under the release of acetylacetone and coordination of -C≡CR ligand to Rh(cycloolefin) moiety. Cis-transoid poly(phenylacetylene) and poly[(2,4-difluorophenyl)acetylene]s with required initial MW were prepared with these catalysts and submitted to the long-term ageing in which the polymers were exposed to the atmosphere and diffuse daylight either dissolved in tetrahydrofuran or in the solid state. Tightly connected processes of cis-to-trans isomerization of the polymer main-chains double bonds and oxidative degradation were found to proceed during polymers ageing in the solution. Besides, the formation of corresponding cyclotrimers accompanied the polymers ageing. However, the cyclotrimers amount was...
|
|
|
Study of molecular weight and configurational stability of substituted polyacetylenes
Trhlíková, Olga
Complexes [Rh(cycloolefin)(acac)] (cycloolefin = norborna-2,5-diene, cycloocta- 1,5-diene and cyclooctatetraene) were investigated as catalysts of polymerization of monosubstituted acetylenes into stereoregular cis-transoid polyacetylenes. All complexes were highly active in arylacetylenes polymerizations in both coordinating and non-coordinating solvents. Selection of solvent and cycloolefin ligand of the catalyst allowed the control over polymer MW. The onset of initiation in the [Rh(cycloolefin)(acac)]/monomer systems proceeded as the proton transfer from the monomer molecule to the acac ligand under the release of acetylacetone and coordination of -C≡CR ligand to Rh(cycloolefin) moiety. Cis-transoid poly(phenylacetylene) and poly[(2,4-difluorophenyl)acetylene]s with required initial MW were prepared with these catalysts and submitted to the long-term ageing in which the polymers were exposed to the atmosphere and diffuse daylight either dissolved in tetrahydrofuran or in the solid state. Tightly connected processes of cis-to-trans isomerization of the polymer main-chains double bonds and oxidative degradation were found to proceed during polymers ageing in the solution. Besides, the formation of corresponding cyclotrimers accompanied the polymers ageing. However, the cyclotrimers amount was too...
|
|
|
Návrh konstrukčního řešení štěpkovače
Felcman, Martin
The goal of this bachelor thesis is design a structural solution of woodchipper, that is used for processing branches and other wood waste. The woodchipper is designed to be powered by tractor's power shaft. At the beginning of the thesis is described the functionality of woodchippers, which is followed by differentiation and description of individual types of woodchippers. In the next part of the thesis, the cutting theory and the geometry of the blade are described. Also the demands for the chipping are determined. The last part of the thesis is dedicated to the necessary calculations and also the 3D model of the woodchipper is available. The work is accompanied by drawing documentation.
|
|
|
Study of molecular weight and configurational stability of substituted polyacetylenes
Trhlíková, Olga ; Sedláček, Jan (advisor) ; Netopilík, Miloš (referee) ; Žigon, Majda (referee)
3 ABSTRACT Complexes [Rh(cycloolefin)(acac)] (cycloolefin = norborna-2,5-diene, cycloocta- 1,5-diene and cyclooctatetraene) were investigated as catalysts of polymerization of monosubstituted acetylenes into stereoregular cis-transoid polyacetylenes. All complexes were highly active in arylacetylenes polymerizations in both coordinating and non-coordinating solvents. Selection of solvent and cycloolefin ligand of the catalyst allowed the control over polymer MW. The onset of initiation in the [Rh(cycloolefin)(acac)]/monomer systems proceeded as the proton transfer from the monomer molecule to the acac ligand under the release of acetylacetone and coordination of -C≡CR ligand to Rh(cycloolefin) moiety. Cis-transoid poly(phenylacetylene) and poly[(2,4-difluorophenyl)acetylene]s with required initial MW were prepared with these catalysts and submitted to the long-term ageing in which the polymers were exposed to the atmosphere and diffuse daylight either dissolved in tetrahydrofuran or in the solid state. Tightly connected processes of cis-to-trans isomerization of the polymer main-chains double bonds and oxidative degradation were found to proceed during polymers ageing in the solution. Besides, the formation of corresponding cyclotrimers accompanied the polymers ageing. However, the cyclotrimers amount was...
|
|
|
Study of molecular weight and configurational stability of substituted polyacetylenes
Trhlíková, Olga
Complexes [Rh(cycloolefin)(acac)] (cycloolefin = norborna-2,5-diene, cycloocta- 1,5-diene and cyclooctatetraene) were investigated as catalysts of polymerization of monosubstituted acetylenes into stereoregular cis-transoid polyacetylenes. All complexes were highly active in arylacetylenes polymerizations in both coordinating and non-coordinating solvents. Selection of solvent and cycloolefin ligand of the catalyst allowed the control over polymer MW. The onset of initiation in the [Rh(cycloolefin)(acac)]/monomer systems proceeded as the proton transfer from the monomer molecule to the acac ligand under the release of acetylacetone and coordination of -C≡CR ligand to Rh(cycloolefin) moiety. Cis-transoid poly(phenylacetylene) and poly[(2,4-difluorophenyl)acetylene]s with required initial MW were prepared with these catalysts and submitted to the long-term ageing in which the polymers were exposed to the atmosphere and diffuse daylight either dissolved in tetrahydrofuran or in the solid state. Tightly connected processes of cis-to-trans isomerization of the polymer main-chains double bonds and oxidative degradation were found to proceed during polymers ageing in the solution. Besides, the formation of corresponding cyclotrimers accompanied the polymers ageing. However, the cyclotrimers amount was too...
|
|
|
Travelling and lifting mechanism
Folprecht, Michal ; Malach, František (referee) ; Malášek, Jiří (advisor)
The main goal this thesis is presenting solution for manipulation with chopper BELL between of hangar and landing zone. The main task is design useful construction solution by required task, also perform a strenght calculations each part of mechanism and drawing documentation. Also included is a 3D visualization of the entire mechanism.
|
guest ::
