|
|
Quantification of measurement accuracy of the pressure losses at evaluation of aluminium casting porosity
Velehradský, Petr ; Jelínek, Milan (referee) ; Pernikář, Jiří (advisor)
The diploma thesis deals with a matter of a leak testingo of the Schreiner devices in the company Kovolis Hedvikov a.s. The tested components are the heat exchangers made from alloy of aluminium used for automobiles. Due to the impact of porosity texture created during the components casting there is leaking. The analysis was accomplished to find out the most problematic parts of these components. Subsequently the testing and measuring were performed in order to classify the testing and detect its accuracy. The summary and suggested solutions of how to improve the accuracy of measuring of the aluminium components leaking are presented in the conclusion.
|
|
|
Evaluation of the flange joints calculations approaches
Jeník, Ivan ; Chlud, Michal (referee) ; Hůlka, Jiří (advisor)
This bachelor´s thesis deals with the design and assessment of flange joints with gasket. The first part defines term flange joint and its load. It surveys and assesses the possible alternatives of design solution. Mentioned is the issue of bolt connections with pretension, including force relations in the joint, determination rigidity of parts and their strength. In addition, analysis of the causes of bolts failures and their removal, methods of creating pretension. It gives an overview of the most widely used types of gaskets, their properties, application and definition of characteristic values of gaskets and their determination according to ČSN EN 13 555. Another section deals with the design process of flange joints, standards for the design, desired outputs and assesses analytical and numerical approach. Computational program was created in MS Excel 2007 for design calculation of flange joints according to ČSN EN 1591-1. Verification of the results was performed with calculation of identical models using finite element method (FEM) in ANSYS Workbench 14.0. Errors in standards formulas were submitted. In conclusion, the results obtained analytically and by FEM were assessed for a specific load conditions of gate valve DN 300. Camprofile (grooved) gasket with nonlinear material model was used.
|
|
|
Optimization of ultrasonic leak detector of pneumatic system
Macků, Ondřej ; Mazal, Pavel (referee) ; Vlašic, František (advisor)
The thesis deals with design and optimization of exchangeable modules for localization of air distributable ultrasound in concept of ultrasound probe design. Several series of these modules were manufactured using the technology of rapid prototyping and tested on artificially created source of air leak. Based on these verification experiments two types covering wide use for identification of pneumatic systems leaks were selected and modified. These two types are long range module for more accurate and expended reach of the leak detection and focusing attachment for narrowing the received range of scanning module and elimination of surrounding ultrasound. Part of the thesis is also analysis of the acoustic signal processed by modern acoustic emission analysers which allow besides standard parameters recording also continuous sampling up to 10 MHz and design solution for attachment of add-on modules to the detector. The thesis is beneficial for raising awareness of leak measurements, prototype manufacturing by using the 3D printing and designing and manufacturing of modules.
|
|
|
The use of air as a measuring media for the detection of leaks in the automotive industry
Babický, Jan ; Kalivoda, Milan (referee) ; Dvořák, Jaromír (advisor)
This bachelor thesis deals with the attributes and usage of air, as a measurement medium for detection and verifying of the leakage range of the measured composition. The goal of this thesis is to generally learn about the detection methods of the leakage range, which are used in the broad technical praxis and about the effects, which can sometimes substantially influence this measurement. In detail, this thesis deals with methods, which use as a testing medium compressed air. The practical goal of this bachelor thesis is the comparison of the measurement methods, alternatively proposal of a new method for the detection of the leakage range of the shaft sealing of the common rail high-pressure pumps, manufactured by the company Bosch Diesel s.r.o. in Jihlava, specifically at product series CPN5.
|
|
|
Optimization of ultrasonic leak detector of pneumatic system
Macků, Ondřej ; Mazal, Pavel (referee) ; Vlašic, František (advisor)
The thesis deals with design and optimization of exchangeable modules for localization of air distributable ultrasound in concept of ultrasound probe design. Several series of these modules were manufactured using the technology of rapid prototyping and tested on artificially created source of air leak. Based on these verification experiments two types covering wide use for identification of pneumatic systems leaks were selected and modified. These two types are long range module for more accurate and expended reach of the leak detection and focusing attachment for narrowing the received range of scanning module and elimination of surrounding ultrasound. Part of the thesis is also analysis of the acoustic signal processed by modern acoustic emission analysers which allow besides standard parameters recording also continuous sampling up to 10 MHz and design solution for attachment of add-on modules to the detector. The thesis is beneficial for raising awareness of leak measurements, prototype manufacturing by using the 3D printing and designing and manufacturing of modules.
|
|
|
An analysis of safety measures Tipsport arena for dealing with emergencies
Benko, Michal ; Fiala, Miloš (advisor) ; Vilášek, Josef (referee)
Title: An analysis of safety measures in Tipsport arena for dealing with emergencies Objectives: The aim of this thesis is to describe and analyze technology in Tipsport Arena ice stadium in Holešovice in terms of safety and security measures and to evaluate the internal measures of HC Sparta Praha. Identify emergency situations that may arise at the ice rink and bring preventive measures generated against these situations. Methods: In this thesis compilation methods were used for the analysis of the key points about technology and hazardous substances used at the ice rink, security plans arising from legislation and an analysis of the integrated rescue system. In the practical part, a technology and safety measures selected ice rink, the used of methods of analysis, observation and interviews. Results: Safety measures Tipsport arena is evaluated as positive and its analysis is given in the safety measures servicing of refrigeration devices, security controls before organizing events, breakdown of activities performed by fire hazard and are accompanied by the documentation of fire protection in Tipsport arena. Keywords: leak, ammonia, system, stadium, failure
|
|
|
Quantification of measurement accuracy of the pressure losses at evaluation of aluminium casting porosity
Velehradský, Petr ; Jelínek, Milan (referee) ; Pernikář, Jiří (advisor)
The diploma thesis deals with a matter of a leak testingo of the Schreiner devices in the company Kovolis Hedvikov a.s. The tested components are the heat exchangers made from alloy of aluminium used for automobiles. Due to the impact of porosity texture created during the components casting there is leaking. The analysis was accomplished to find out the most problematic parts of these components. Subsequently the testing and measuring were performed in order to classify the testing and detect its accuracy. The summary and suggested solutions of how to improve the accuracy of measuring of the aluminium components leaking are presented in the conclusion.
|
|
|
The use of air as a measuring media for the detection of leaks in the automotive industry
Babický, Jan ; Kalivoda, Milan (referee) ; Dvořák, Jaromír (advisor)
This bachelor thesis deals with the attributes and usage of air, as a measurement medium for detection and verifying of the leakage range of the measured composition. The goal of this thesis is to generally learn about the detection methods of the leakage range, which are used in the broad technical praxis and about the effects, which can sometimes substantially influence this measurement. In detail, this thesis deals with methods, which use as a testing medium compressed air. The practical goal of this bachelor thesis is the comparison of the measurement methods, alternatively proposal of a new method for the detection of the leakage range of the shaft sealing of the common rail high-pressure pumps, manufactured by the company Bosch Diesel s.r.o. in Jihlava, specifically at product series CPN5.
|
|
|
Evaluation of the flange joints calculations approaches
Jeník, Ivan ; Chlud, Michal (referee) ; Hůlka, Jiří (advisor)
This bachelor´s thesis deals with the design and assessment of flange joints with gasket. The first part defines term flange joint and its load. It surveys and assesses the possible alternatives of design solution. Mentioned is the issue of bolt connections with pretension, including force relations in the joint, determination rigidity of parts and their strength. In addition, analysis of the causes of bolts failures and their removal, methods of creating pretension. It gives an overview of the most widely used types of gaskets, their properties, application and definition of characteristic values of gaskets and their determination according to ČSN EN 13 555. Another section deals with the design process of flange joints, standards for the design, desired outputs and assesses analytical and numerical approach. Computational program was created in MS Excel 2007 for design calculation of flange joints according to ČSN EN 1591-1. Verification of the results was performed with calculation of identical models using finite element method (FEM) in ANSYS Workbench 14.0. Errors in standards formulas were submitted. In conclusion, the results obtained analytically and by FEM were assessed for a specific load conditions of gate valve DN 300. Camprofile (grooved) gasket with nonlinear material model was used.
|
|
|
A simulated road accident of a tank truck in Ústí nad Labem resulting in chlorine leakage
LANGOVÁ, Regina
The main theme of the diploma thesis is simulated accident of a truck transporting pressure barrels with chlorine.The study is focused on evaluating the effects of the accident on the lives and health of the local population and assessing the risks (and the level of hazards) with the use of selected methods.In this study, the truck accident is described in detail and the risks are evaluated through using the IAEA-TECDOC-727 method, which is based on quantitative risk assessment of sources according to the level of hazard to lives.
|
guest ::
