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Check valve
Nehybová, Petra ; Závorka, Dalibor (referee) ; Klas, Roman (advisor)
In this Master thesis are mentioned the most used constructions of non-return valves. Further consist of operation principles, fields of application, properties and diffi-culties connected to non-return valves. Motion plug of check valve in liquid is described based on CFD Software simulation.
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Monitoring of hydraulic machines using acoustic emissions
Závorka, Dalibor ; Pochylý, František (referee) ; Habán, Vladimír (advisor)
The goal of this diploma thesis is to clarify possibilities of usage of acoustic emission as a hydraulic machinery diagnostics tool. Especially for exposing presence of ruptures or cracks in the parts of machine, assuming changes in acoustic exposure of the part during operation. This clarification is based on series of simple measured experiments, which consist of monitoring the bolt placed in fluid stream inside of a pipe. This bolt was preloaded against inner wall of pipe by appropriate tightening torque. This preload is supposed to simulate effects of the size of rupture. High preload simulates small rupture or none in object and respectively small preload is supposed to simulate big rupture. A group of pressure sensors and accelerometers measures experiments and their evaluations are processed by script created in software MATLAB. Outputs of this script are charts with effective values of respective sensors from the entire record split into individual frequency spectrums. These charts compare spectrums of each configuration to judge effects of parameters changes.
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Acoustic diagnostics of combustion engines operating conditions
Závorka, Dalibor ; Prokop, Aleš (referee) ; Zubík, Martin (advisor)
The goal of this bachelor thesis is to hand over a compact overview of methods and today’s available equipment for the acoustic diagnostics of combustion engines. There are described the basic principles of diagnostics and acoustic diagnostics including definition of their basic terms. Work further deals with the description of methods and accessories of acoustic diagnostics and explains principles of their usage. Final chapter is dedicated to detailed description of the most common sound expressions of engine, signalling occurred or oncoming failure. Explaining the origins of particular sound, what can be its consequences and how to prevent these problems.
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Hydraulic braking systems
Požár, Vladimír ; Závorka, Dalibor (referee) ; Klas, Roman (advisor)
This bachelor’s thesis is focused on processing information about the hydraulic braking system. It describes the basic parts and diferrent types of brakes contained in the hydraulic braking system. It explains the principle of brakes. Most attention is paid to the hydraulic retarder part from the point of view of principle and basic equations for calculating the filling ratio. The final chapter includes a comparison of brakes and use of a hydraulic braking systém.
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Cavitation heater
Rovder, Juraj ; Závorka, Dalibor (referee) ; Rudolf, Pavel (advisor)
This report is considering an equipment that is using cavitation to heat water. The theoretical part explains basic principles of its function and different types of such device. Following chapters describe a construction of used heater and an experiment carried out on this device. The results of the experiment are collected and evaluated. The final part of the thesis contains suggested adjustments of the given cavitation heater.
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Dynamic properties of thermometers
Tomšej, Radek ; Závorka, Dalibor (referee) ; Himr, Daniel (advisor)
This bachelor thesis deals with temperature measurement. The introduction describes the individual methods including the principles on which the methods are based. Furthermore, it presents the suitability of these individual methods, including the properties of thermometers based on the given methods. The experimental part of the thesis evaluates the practical measurement of temperature and proposes the design methods of determining the temperature in a time much faster than the response time of the thermometer.
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Hydraulic braking systems
Požár, Vladimír ; Závorka, Dalibor (referee) ; Klas, Roman (advisor)
This bachelor’s thesis is focused on processing information about the hydraulic braking system. It describes the basic parts and diferrent types of brakes contained in the hydraulic braking system. It explains the principle of brakes. Most attention is paid to the hydraulic retarder part from the point of view of principle and basic equations for calculating the filling ratio. The final chapter includes a comparison of brakes and use of a hydraulic braking systém.
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Check valve
Nehybová, Petra ; Závorka, Dalibor (referee) ; Klas, Roman (advisor)
In this Master thesis are mentioned the most used constructions of non-return valves. Further consist of operation principles, fields of application, properties and diffi-culties connected to non-return valves. Motion plug of check valve in liquid is described based on CFD Software simulation.
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|
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Cavitation heater
Rovder, Juraj ; Závorka, Dalibor (referee) ; Rudolf, Pavel (advisor)
This report is considering an equipment that is using cavitation to heat water. The theoretical part explains basic principles of its function and different types of such device. Following chapters describe a construction of used heater and an experiment carried out on this device. The results of the experiment are collected and evaluated. The final part of the thesis contains suggested adjustments of the given cavitation heater.
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Dynamic properties of thermometers
Tomšej, Radek ; Závorka, Dalibor (referee) ; Himr, Daniel (advisor)
This bachelor thesis deals with temperature measurement. The introduction describes the individual methods including the principles on which the methods are based. Furthermore, it presents the suitability of these individual methods, including the properties of thermometers based on the given methods. The experimental part of the thesis evaluates the practical measurement of temperature and proposes the design methods of determining the temperature in a time much faster than the response time of the thermometer.
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