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Vehicle Hydropneumatic Unit
Koudelka, Roman ; Hejtmánek, Petr (referee) ; Blaťák, Ondřej (advisor)
This diploma thesis, following the bachelor's thesis, is devoted to the gas-liquid unit of a vehicle, as the central element of hydropneumatic suspension. The aim is to dimension and construct this component and integrate it together with other elements into a complex suspension system. Based on possible forms listed in the research section, regarding to current development trends, the form of the unit is chosen. The practical part begins with simulations comparing a hydropneumatic with a conventional suspension system. After solving this issue, it is possible to proceed to the dimensioning of the basic parameters of the unit and then to its construction, respecting the relevant strength calculations. The last step is to build a conceptual design of the whole hydropneumatic suspension system.
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Design of mobile horizontal wood-splitting machine
Dressler, Jan ; Škopán, Miroslav (referee) ; Knoflíček, Radek (advisor)
This thesis shows making of documentation for production powerfull wood-splitting machine for hardest forestal work. There are researched and soluted all phases of pre-production machine's lifecycle, also means analysis of conception, potentional risks and failures analysis and also definition of required properties. Based on those properties and results of analyses is possible to setting up condition which should be satisfied. At following part are descripted and shown features of machine-design . Main feature (component) of machine is its frame, also there are strenght analysis of frame. Machine movement features are mainly hydraulics pistons which are powered by asynchronous engine, whith alternative possibility movement by wheel tractor power-take off shaft or hydraulics output. There are performed all important properties. Working safety questions and high endurability of machine shold be also performed. At the end of work is realised conception and design study of forestal production system for wood processing with one universal source of energy – wheeled tractor.
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Simulation of the energy recovery circuit function
Kubíček, Ondřej ; Ficza, Ildikó (referee) ; Nevrlý, Josef (advisor)
This bachelor thesis describes the design and optimization of a mathematical model for simulating the hydrostatic energy recovery systems. The mathematical model together with the experimental stand should be used to simulate the operating conditions of vehicles using the hydrostatic energy transmission. These include vehicles for collection of municipal waste, public transport vehicles, or for heavy construction machinery. The paper summarizes the current efforts in the design of analytical models, describes the program developed in MATLAB, and is devoted to analyzing the influence of individual input parameters on the output calculation.
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Aircraft Hydraulic Systems
Puller, Tomáš ; Vaněk, František (referee) ; Třetina, Karel (advisor)
Work "Hydraulic system of aircraft" is focused on the issue of hydraulic transmission of forces to control the airplane. The first and second part summarizes the main characteristics of hydraulic systems and the basic physical properties of liquids.The third section describes various components of hydraulic systems and their characteristics. The fourth part contains a description and diagrams of different types of hydraulic circuits and the fifth part describes types of servocontrol systém of aircraft. In chapters 6 and 7 are descriptions of hydraulic systems of two Czech airplanes, L - 159 and L – 410. The next part contains statistical summary of power installations in small and medium-sized airplanes, and comparison of properties of different forms of transmission power. Finally, the evaluation of the statistical summary is carried out.
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Analysis of structures of compact hydraulic equipment
Sordyl, Martin ; Pokorný, Jan (referee) ; Pokorný, Přemysl (advisor)
The subject of this thesis is realization of short research of current compact hydraulic power unit, realization of FEM analysis with aim to find inappropriately dimensioned parts of structures. Based on this data design optimized solution of structures and create drawings of weldments. This thesis is carried out in cooperation with company Bosch Rexroth, spol.s.r.o.
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Hydraulics solar systems
Podjuklová, Lucie ; Topič, Jan (referee) ; Počinková, Marcela (advisor)
The project addresses in the theoretical part of the hydraulics of solar systems and her components, which are used to design a solar system on apartment house. Solar systém addresses praparation hot water in two variants of the solution. In the first alternative solution is used low flow and 15 l/hod.m2 support stratification. In the second variant is used higher flow 20 l/hod.m2 without support stratification. In the experimental part is solved by the data analysis of the same apartment building, where the solar system are already installed and operated. Some data from the measurement was taken into account and used in the design and calculation of both options.
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Design mechanism for raising the roof of a trailer
Štefek, Ondřej ; Zeizinger, Lukáš (referee) ; Foltýnová, Dana (advisor)
This bachelor's thesis deals with the design of a mechanism for lifting the roof of a flatbed trailer. Commercially available mechanical and hydraulic lifts are described in the introduction. In the next chapters, the design of mechanical and hydraulic lifts is discussed. For selected structural elements of mechanical lifting, a safety analysis is then performed with respect to the limit state of elasticity and ergonomic control. For hydraulic lifting, the safety of the cylinder rod for buckling is checked. The proposals are then financially calculated and compared with commercially available lifts. Drawing documentation is prepared for mechanical lifting.
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Design of mini backhoe
Vorlíček, Vít ; Kašpárek, Jaroslav (referee) ; Škopán, Miroslav (advisor)
The aim of the bachelor thesis is to design a small tractor backhoe and aggregate it into a three-point suspension system with a maximum tearing force of at least 20 KN. This thesis is divided into six chapters and it deals with the division of excavator equipment, parts of excavation and analysis of competition, alternatives of design solution, design of own concept, functional calculations and strength calculations.
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Piping systems for district heating
Malach, Tomáš ; Horák, Petr (referee) ; Hirš, Jiří (advisor)
In the first part of master thesis is presented general introduction to district heating system (DHS) and hydraulic calculation for DHS. The next part deals with analysis operation of DHS and the pressure diagram for certain time interval. Subsequently, the thermohydraulic characteristics for the hydraulic main branch (comparing manual calculation with software calculation) and also the selected thermal and hydraulic characteristics for the whole DHS are shown. The last part is focused on the determination of the amount of heat supplied based on the ultrasonic flowmeter and the temperature probes. Subsequently, the computer simulation is also carried out, aiming at approximating the real heat supply from heat source to solved thermal network in winter.
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Design of a hydraulic tester for determining the axle play of vehicles
Tůma, Vladimír ; Sliwková, Petra (referee) ; Sedlák, Josef (advisor)
The goal of this thesis is a design of a hydraulic tester for detection of the clearance of the truck front axle at the lines of technical inspection stations. The beginning of the thesis is dedicated to an introduction of the company, which is the first manufacturer of such device in the Czech Republic. The main content of the paper is the analysis of the current technological process of production from purchasing the material to the final assembly at the customer. In the last part of the thesis the technological innovation, which makes the current procedure more efficient as well as its financial assessment, is described.
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