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Study of fatigue life of roller bearings type 6204 -2Z
Poláček, Vojtěch ; Svoboda, Petr (referee) ; Klapka, Milan (advisor)
This bachelor thesis deals with the basic description of produced by fatigue failure of ball bearings. In the paper there is a description of basic diagnostic methods of machine parts. Following there is a study of vibration, their recording and the evaluation concerning bearing lifetime. The aim of the experimental part of the paper is to check the functionality and suitability od the VDT2000 analyzer and VDT Control Center software, both made by company VidiTech, s.r.o. together with the SA67 laboratory experimental stations owned by the Department of Design at Faculty of Mechanical Engineering, which were used for examining the 6204-2Z bearings. The aim of the lifespan exam is to confirm the reliability of the bearing failure warning by the analyzer and to assess the ability to record the first stages of bearing damage.
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Study of bearing noise regarding accuracy of machining
Studýnka, Pavel ; Sabo, Karol (referee) ; Klapka, Milan (advisor)
This bachalor thesis deals with connection between the quality of surface of raceways of a bearing and vibrations in operation. This thesis describes basic geometrical parameters of a bearing that have main influence on its resulting quality and vibrations. It presents methods to evaluate the quality of the raceways surfaces and their connection between them. As a part of the thesis is an experiment, which should prove, what is the connection between the measuring of quality of the surface of raceways and measuring the vibrations of bearings during the process, by the way used in the company KOYO Olomouc. The quality of raceways is evaluated on a measuring device MUK-F 300 and vibrations on IL 100R/2000.
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Vibration diagnostics of bearings
Navrátil, Pavel ; Mazal, Pavel (referee) ; Klapka, Milan (advisor)
This bachelor’s thesis introduces the basic principles of vibrodiagnostic methods and their importance for individual fase of bearing’s damage. The selected methods studied are: acoustic emission, SPM (shock pulse method), SEE (spectral emission energy), envelope method, High frequency emission, Crest factor, Kurtosis factor and special method for slow-motion machines Adash Compressed Time.
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Assessment of technical condition of the Hradek water supply network
Tranová, Kateřina ; Tauš, Miloslav (referee) ; Ručka, Jan (advisor)
This bachelor´s thesis aims to assesment of technical condition of the water supply network and hydrants in Hrádek. The semi-quantitave evaluation method called the Failure Modes and Effects Analysis (FMEA) was used for assessing and evaluation of the technical condition. The outcome of this work is a number of tables and maps of water pipes with the evaluation of the technical condition of the water network and hydrants. A part of the appendix are also drawing, there was assesment of technical condition of the water supply represented and there was a assesment of technical condition of the underground hydrants represented.
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Technical audit of water tanks
Šlesinger, Jan ; Kučera, Tomáš (referee) ; Tuhovčák, Ladislav (advisor)
The bachelor thesis is aimed at modificating and improving the computer application TAWAT, used for technical audit of water tanks, followed by evaluating chosen water tanks using this application. The first part of the thesis provides a brief introduction into the issue of water tanks design and a description of the current state of the matters in the Czech Republic and Slovakia. Further, a draft of a computer application for evaluating water tanks according to the methodology prescribed by regulation of the ministry of the environment of the Slovak Republic n. 262/2010 is developed. In the practical part dealing with evaluation of water tanks, results from the particular applications are compared for chosen objects. In the final part, a sketch of basic structure of TAWAT web application is worked out.
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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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Analysis of the machinery as a component of the accident system in the area of traffic operations of self-propelled motor vehicles
SLUKA, Jiří
The theme of this student thesis is {\clq}qAnalysis of the machinery as a component of the accident system in the area of traffic operations of self-propelled motor vehicles``. It deals with problems of traffic and main causes of deaths and injuries in road accidents, and proposes a possibility of their elimination. The solution is based on the fact that most of the road accidents are caused by drivers themselves who don´t pay enough attention by driving or their behaviour behind the wheel isn´t sufficient. The proposed solution is supposed to monitor the traffic in real time and in co-operation with specially-designed program installed in the electronic control unit of the vehicle it´s able to notify the driver of dangers around him. The system is also able to dynamically control the traffic in order to prevent traffic-jams, accidents on pedestrian crossings, etc. As a result of system implementation the author estimates rapid decrease in fatal road accidents, serious injuries and physical damages.
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