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Steam ejector pump
Třináctý, Jan ; Baláš, Marek (referee) ; Šnajdárek, Ladislav (advisor)
The aim of this theses is to do search about maintaining vaccum in surface condensors and subsequently propose basic dimension of one stage steam ejector. The first part deals with the issue of vacuum. The following part is dedicated to description of various types of vacuum pumps. Hence it describes the principle of operation of each pump as well as their output. The following part deals with vacuum and vacuum technology in the field of power engineering. This part is dedicated to those types of vacuum pumps that are used in power engineering, especially to steam ejectors which are most widely used. The final part is addressed to the design of single stage steam ejector. This part contains the calculation of pump dimension. The conclusion evaluates the design of one stage steam ejector.
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The application tanker for the trailer MEGA 33
Koukal, Vojtěch ; Molva, Martin (referee) ; Kašpárek, Jaroslav (advisor)
This diploma thesis deals with conceptual design of application tanker for swap carrier MEGA 33. The first part of the thesis is focused on filling and emptying process possibilities, material alternatives used for the tankers manufacturing and evaluation of tankers with similar construction solution. The main part of this thesis describes conceptual design of tanker carrier. On the basis of this concept the stress analysis using finite element method has been completed. This thesis also includes relevant drawing documentation.
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Using Cosmos FloWorks for analyse the detector.
Bordovský, Petr ; Špinka, Jiří (referee) ; Maxa, Jiří (advisor)
This work deal with the analysis of influence of pressure‘s sizes in vacuum chamber of specimen Evironmental Scanning Electron Microscope and the influence of sizes of aperture diaphragm by scintillation detector. The analysis proceeds in detector of secondary electrons. The detector is modelled by system 3D CAD SolidWorks with the help of system CAE Cosmos FloWorks.
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Comparison of mechanical properties of bolts with various surface treatment and upon consideration of their operation on the safety limit
Krško, Peter ; Skalka, Petr (referee) ; Ševeček, Oldřich (advisor)
This bachelor thesis deals with issues of critical bolt joints tightening on the safety limit. The aim of this work is to find the optimal surface treatment of the bolt for reliable application in industrial vacuum pumps and to clarify its stress-strain behaviour upon using various surface treatments and different surface lubrication. Next part consists of finding the maximum torque values causing a fracture in bolts of the vacuum pumps. For this purpose, on one hand, the analytical model of the bolt joint is used and, on the other hand, the experimental observations on the real bolt joint are utilized. The outputs of both approaches are then compared to each other and, on their basis, the most suitable surface treatment of the bolt joint for the given industrial pump is recommended in order to achieve the maximum possible safety against torque applied to the bolt when assembling the device.
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Řízení vývěvy dojicího stroje frekvenčním měničem
Šimoník, Jiří
The diploma thesis is focused on the issue of controlling the vacuum pump of the milking machine with the help of a frequency converter. The theoretical part deals with stables for dairy cows. The principles of welfare and housing of dairy cows, as well as other types of cattle, are briefly described here. Emphasis is placed on the description of individual types of milking parlours and their advantages and disadvantages are highlighted. The main part of the literary research of the diploma thesis is devoted to machine milking. The principle of machine milking, vacuum regulation and individual types of vacuum pumps are described in this section. Stress is also put on the drive of vacuum cleaners, namely asynchronous motors. In the practical part, an uncontrolled asynchronous motor is compared with a controlled asynchronous motor using a frequency converter during milking. In this part of the thesis, both laboratory measurements and measurements in the company are performed. On the basis of the obtained values, the technical and economic parameters of the individual methods of controlling the asynchronous motor are subsequently evaluated both in the laboratory and in the field.
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Design proposal of thermo-vacuum chamber for space segment testing
Udatný, Martin ; Mašek, Jakub (referee) ; Lazar, Václav (advisor)
Diplomová práce se zabývá termo-vakuovým testováním kosmických zařízení a návrhem termo-vakuové komory ve které jsou testy prováděny. V teoretické části jsou popsány testy a požadavky na ně, zejména požadavky vycházející z ECSS standardů. Dále jsou popsány prvky komor a podsystémy běžně používané v praxi. V praktické části je vytvořen koncepční návrhy termo-vakuové komory obsahující tři alternativní varianty řečení, které jsou následně porovnány a na vzhledem ke stanoveným parametrům je vybráno nejoptimálnější řešení. Zvolené řešení je dále rozvinuta o MKP strukturální analýzu a výběr hlavních komponent zajišťující splnění stanovených požadavků. Hlavními výstupy práce je CAD model termo-vakuové komory a schéma infrastruktury subsystémů. Tyto výstupy mohou sloužit jako základ pro kompletní návrh termo-vakuové komory.
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Comparison of mechanical properties of bolts with various surface treatment and upon consideration of their operation on the safety limit
Krško, Peter ; Skalka, Petr (referee) ; Ševeček, Oldřich (advisor)
This bachelor thesis deals with issues of critical bolt joints tightening on the safety limit. The aim of this work is to find the optimal surface treatment of the bolt for reliable application in industrial vacuum pumps and to clarify its stress-strain behaviour upon using various surface treatments and different surface lubrication. Next part consists of finding the maximum torque values causing a fracture in bolts of the vacuum pumps. For this purpose, on one hand, the analytical model of the bolt joint is used and, on the other hand, the experimental observations on the real bolt joint are utilized. The outputs of both approaches are then compared to each other and, on their basis, the most suitable surface treatment of the bolt joint for the given industrial pump is recommended in order to achieve the maximum possible safety against torque applied to the bolt when assembling the device.
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The application tanker for the trailer MEGA 33
Koukal, Vojtěch ; Molva, Martin (referee) ; Kašpárek, Jaroslav (advisor)
This diploma thesis deals with conceptual design of application tanker for swap carrier MEGA 33. The first part of the thesis is focused on filling and emptying process possibilities, material alternatives used for the tankers manufacturing and evaluation of tankers with similar construction solution. The main part of this thesis describes conceptual design of tanker carrier. On the basis of this concept the stress analysis using finite element method has been completed. This thesis also includes relevant drawing documentation.
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Special technical solutions in vacuum technology
SZABÓ, Robin
This thesis is focussed on the realisation of various technical solutions for microwave plasma apparatus. The theoretical part focuses on vacuum and general terms that are related. Attention was paid for example to definition of pressure, to pressure and central free track, units of measurement of pressure and their conversions. This part includes the classification of vacuum according to pressure. The next section of the dissertation is concerned with achieving vacuum including a description of rotary oil and turbo molecular pump. Part of the thesis includesa description of plasma microwave apparatus CX22 which was used during realisation of this dissertation. There is also a description of vacuum chamber, gas pump system, system of gas lead, microwave source, evaporator of liquid precursor and mixing apparatus. In the practical section a measurement of physical and technological quantity included. This part covers the inflow of apparatus measurement and temperatures of substrate during plasma process. In the next part there is a description of specific technical solutions suggested by the dissertation author. Amongst suggested technical solutions in this paper there is vacuum isolator, heating system of evaporator pipe, box of an evaporator of liquid precursor, ''gas ring'' and tablet equipment. Vacuum isolator was designed by 3D simulation and serves as a connection to detection technology. Heating of pipes of an evaporator were constructed to improve quality of the plasma process. The box of an evaporator was suggested for maintaining fresh air in a lab. A Gas ring was also designed by 3D simulation and serves as a specially adjusted pipe for bringing vapour of precursor near the substrate. The tablet equipment was constructed for unified preparation of compressed powder cellulosic tablets. Also from the available vacuum pumps, multilevel pumping was constructed that helped achievement of reduced lowest pressure.
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