|
|
Types of rolling bearings wear
Kapusta, Juraj ; Košťál, David (referee) ; Zapletal, Tomáš (advisor)
The aim of this bachelor thesis is to classify the rolling bearing wear from the very origin, the course in the operating state and the resulting quality of the component until the complete elimination. The design and subsequent production guarantee the life of the part, when the required working hours work safely. The designer's role in designing a bearing selection for a given bearing, lubrication and load transfer is to take into account all factors that could lead to damage. In practice, the customer's choice of bearing is recommended according to various computational methods that ensure optimal selection of a standardized bearing from the catalog. The individual parts contain values specifying the strength and dynamic properties that the customer can handle. The result will be a survey of several real companies, analysis of their implementation and accessibility of modules to facilitate the selection of the correct bearing. To do this, I try to make the issue of wear and tear accessible, which is related to the prevention of these undesirable effects.
|
|
|
Deisgn of Reconstruction of the Rapotice - Náměšť nad Oslavou Railway Track
Zapletal, Tomáš ; Andratschke, Jan (referee) ; Hruzíková, Miroslava (advisor)
The aim of this bachelor thesis was to propose a change of track geometrical parametres lining and levelling and a reconstruction of railway superstructure and substructure in the track section Rapotice – Náměšť nad Oslavou. The track section starts at the 19,2 km point of turnout number 5 to the railway station Rapotice and ends at the 22,2 km mark after crossing a steel bridge with a continuous rail bed over the Chvojnice river. The thesis deals with railway drainage, reconstruction of railway crossings and provides a work technology proposal. Study of speed increasing in the track section was solved in the thesis too.
|
|
|
Wear regimes of aluminium alloys
Slivka, Václav ; Zapletal, Tomáš (referee) ; Šperka, Petr (advisor)
This thesis deals with the research of the wear regimes of the selected aluminium alloy in the conditions of dry friction. The aim of this work is the evaluation of the measure of an abrasive and adhesive wear of this alloy. This evaluation is made from the experiments which are made on the base of the knowledge of the research study. The dependence of the wear on the sliding speed and load, the friction on the sliding speed and load and the dependence of the normalised pressure on the normalised speed, so called the map of wear, are given on the base of the results of the measure.
|
|
|
Comparison of 3D objects in JAVA language
Zapletal, Tomáš ; Smékal, Zdeněk (referee) ; Šmirg, Ondřej (advisor)
The main aim of the thesis is loading of 3D models in different file formats and its displaying, creating of slices from 3D models and vice versa making 3D models from slices, quantify inaccuracy of anti-aliasing and other formatting and investigate similarity of original and edited models. Everything in Java programming language and its extensions for 3D object tasks. Thesis builds on earlier project „3D shape from MRI“.
|
|
|
Influence of the surface roughness features on the next rolling bearing element
Saksa, Vladimír ; Zapletal, Tomáš (referee) ; Košťál, David (advisor)
This bachelor thesis deals with investigation of influence of the surface roughness features on the next rolling bearing elements. It researches changes in the film profile entering into the contact. This thesis describes also elastohydrodynamic lubrication regime by witch each rolling bearing works as well as the difference between fully flooded and starvation contact of rolling ring with rolling bearing element. The part of the thesis is the experiment using different kinds of lubricats from which is visible really influence of these contacts. This experiment is realized on the contact simulator and the film thickness is measured using method of optical interferometry.
|
|
|
Tool for simulation visualization
Zapletal, Tomáš ; Karásek, Jan (referee) ; Burget, Radim (advisor)
This bachelor's thesis is engaged in concept and implementation of tool that is able to visualize output of simulation of production processes. For this purpose multiplatform application was created to play back objects movement on the game field based on data, saved in text files. It is possible to watch simulation progress carefully in real time or faster. Tool is suitable for validation of designed simulating model and for revealing possible fault.
|
|
|
Design of the supporting frame of lift cage
Zapletal, Tomáš ; Komenda, Lukáš (referee) ; Dvořáček, Jiří (advisor)
This thesis is focusted in design of supporting frame of lift cage. Working load of frame is 1000 kg (13 people). Nominal speed is 2,5 m/s. First part is focusted in design of car frame. Car frame is made from steel bent profiles, connected each other with bolts. This work also contains final elemnt analysis of frame. Structure is analyzed by software Autodesk Inventor.
|
|
|
The effect of surface grooves on transition to mixed lubrication
Zapletal, Tomáš ; Hartl, Martin (referee) ; Šperka, Petr (advisor)
The purpose of this diploma thesis is to describe the influence of artificially produced surface grooves on transition from full EHL regime to mixed lubrication in point contact using optical interferometry. This article focuses on influences of grooves orientation, length in contact area, elastic properties of contact surfaces and different types of oil defined by pressure-viscosity coefficient. Empirical prediction model of groove influence on film thickness was established based on experimental data. The groove influence was incorporated into lubrication parameter. This modified definition was compared to classic one. It showed that avoiding groove influence in classic definition lead to significant underestimation. Influence of groove on friction coefficient is also studied.
|
|
|
Concept of Information System for Primary School
Zapletal, Tomáš ; Šustr, Vilém (referee) ; Dydowicz, Petr (advisor)
This term paper deals with the proposal of an information system for a private elementary school. There are listed theoretical background needed for understanding the issue, further analysis of the current situation at the school, description of the current state of information resources and facilities and the very proposal of information system.
|
|
|
Web Pages Design
Zapletal, Tomáš ; Šustr, Vilém (referee) ; Koch, Miloš (advisor)
This bachelor thesis deals with design websites for private watchmaker's. In a brief theoretical background followed by a practical implementation of specific design solutions. Contains not only the proper execution site, but also the distribution of content or sample design. The resulting site is suitable for real applications, at the end of the work includes suggestions for possible improvements and extensions.
|
guest ::
RSS feed.