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Valve Exploiting Principle of the Side-Channel Turbine
Jandourek, Pavel ; Janalík, Jaroslav (referee) ; Varchola, Michal (referee) ; Pochylý, František (advisor)
The presented work deals with basic characteristics of the side-channel machines. The intention is to replace the pressure reducing valve by low-specific speed side-channel turbine. Thereby creating a kind of turbine valve using energy, which would otherwise be dissipated in the valve. Pressure reducing valves are the source of large hydraulic losses and their replacement is possible, because the same resistance characteristics side-channel turbine and a pressure reducing valve.
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Valve controls and their timing
Vajčner, Patrik ; Pexa, Martin (advisor) ; Kotek, Tomáš (referee)
Abstract: Comparison of different types of valve operating mechanisms is the main aim of the Bachelor thesis. This was done from the point of view of the construction manufacturing, with regard to the engine performance, user´s comfort and fuel consumption of a vehicle. There were two types of valve operating mechanisms chosen for the purpose of the Thesis. The first one is a typical classic system whereas the second one is a modern type with a possibility of timing, which allows different timing for valves opening and closing. This process is dependent on the current requirement of engine output. Achievement of the optimal engine output for every specific type of ride is not the main purpose of the correct timing of valves and engine run adjustment in a vehicle. It also allows for a reduction of the excessive engine load and gradual wearing of each part of the system. Of course another very significant reason is to lower the fuel consumption as much as possible with regard to reduction of harmful, environmental unfriendly gases and emissions.
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Safety of automated industrial valves in operating conditions
Kryštof, Ondřej ; Trávníček, Petr (referee) ; Kotek, Luboš (advisor)
Choosing suitable and safe valve with accessories depends on general specifications for plant. Using valve for on/off, throttling, back-flow prevention, etc., pressure drop is related with Kv value or leakages from piping systems are main factors for properly valve selection. Valve have to resist chemicals and substances that may change the state, temperature and its fluctuation, pressure, corrosion and erosion. This properties determine pressure class, temperature resistance, connection into pipe and sealing material as gland packing, seats, seal between flange etc. This and other specification, listed in this thesis, can help determine suitable type of valve. This thesis deals construction design of valve and accessories as well. The last chapters are focused on calculation of safety valve and selection safe and appropriate control valve with accessories.
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Simple agrocontroller
Pelikán, Michal ; Friedl, Martin (referee) ; Steinbauer, Miloslav (advisor)
Simple agrocontroller is a realization of control computer of spray machine in agriculture technique. Introduction describes the types of individual sprayers and their main differences. Hydraulic scheme displays the layout of regulators, ventils, hosepipes etc. Chapter Requirements defines needed functions and variables. Next chapter explains the structure of the layout of agrocontroller´s individual parts. Also defines required functions and features of these parts with real circuits and components and methods of gaining required values. Practical part show how printed circuits boards look like and what are features and properities of agrocontroller.
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Software for an automatic testing of valves
Mudroch, Andrej ; Havránek, Zdeněk (referee) ; Vágner, Martin (advisor)
In this paper the software design and implementation of automated control system for test device is discussed. The device will serve for tests of drinking water valves. As regards the control and software design, the important parts are identified and their functions are discussed in details. As part of software design, the basic system structure and it`s modules` functions are described using UML diagrams. Because of implementation reasons, ways of communication – such as M-BUS are described; as well as acquiring, processing and writing data to output. User interface created in LabVIEW is created as well. All mentioned application blocks were implemented. In addition, in this paper there is overview of testing methods for drinking water valves.
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Temperature control of a multifunction hall
Petr, Vojtěch ; Šír, Michal (referee) ; Zezulka, František (advisor)
The topic of this bachelor thesis was to propose and program a control system for heating multipurpose halls. The system includes temperature sensors, circulation pumps, actuators, boiler for solid fuels, biogas plant and an electric boiler. Everything is controlled with a PLC CyBro-2, which communicates via ModBus protocol with a computer, where a graphical interface is programmed in Relaince 4. In the graphical interface customer can set the temperature value, choose a heating mode and export data of the heat consumption.
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Influence of thermal shocks on fatigue of pressure equipment components
Umlauf, Martin ; Vincour, Dušan (referee) ; Létal, Tomáš (advisor)
This thesis examines influence of thermal shock on fatigue of pressure equipment components. The paper relates to project of IMI CCI Brno, which is a leading manufacturer of valves for the energy and process industries. Analysis concerns the impact of thermal shock concentrating on high pressure part of the steam valve. And proposal for a new valve geometry that reduces machining operations and reduce financial costs of production. First part of the thesis presents a basic review of fatigue damage components concerning mechanical loading and thermal – mechanical loading. Second part of the study creates FEM model of the valve. FEM model simulate temperature field and stress during thermal shock. Influence of thermal shock to fatigue damage was computed on basis of stress tensor obtained from FEM simulation under Chapter 18 of the standard EN 13445-3. Existing valve geometry was verified and the new geometry was proposed that simplified and reduce financial costs of production.
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Cyclic Engine Visualization
Fajkus, Jan ; Granát, Jiří (referee) ; Přibyl, Jaroslav (advisor)
Objective of this thesis was acquaint oneself with theory of cyclic engines, understand their principle, describe their conjunctive and different properties. Program part consisted in creating visualization of chosen engines in C/C++ language using openGL.
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Design of stand for atmospheric resistors testing
Kerek, Milan ; Hudec, Martin (referee) ; Houška, Pavel (advisor)
This master’s thesis deals with the design and manufacture of device for testing and verification of functionality of atmospheric resistors produced by IMI CCI Czech Republic. An atmospheric resistor, also called disk stack, is a stack of disks through which the medium flows and the system of labyrinths in disk stack causing a pressure reduction of medium. This thesis describe design of the mechanical parts of stand for atmospheric resistors, choice pneumatic circuit’s components, data acquisition hardware for measuring flow, inlet and outlet pressure, and temperature. The software was created in LabVIEW programming environment. In the end of this paper was done measurement in order to test functionality of test stand and software.
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The grinding of valves
Stránský, Michal ; Bumbálek, Bohumil (referee) ; Osička, Karel (advisor)
This diploma thesis deals with grinding of parts of valves. In the first part is theoretically described valve and its manufacturing. Another part focuses on the analysis of existing grinding technology. In last part of this diploma thesis is written about choosing of suitable places for rationalization, design of rationalization and technical-economic evaluation of performed rationalization.
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