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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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Mobile Wood Splitter
Baroň, Lukáš ; Kašpárek, Jaroslav (referee) ; Škopán, Miroslav (advisor)
The aim of this bachelor thesis is the design a few variants of wood splitter and substantiate for the selection of the most suitable design to the requirements. Further then suggestion the cutting edge drive to the splitter was able to draw the specified strenght. Functional and strenght calculations of the individual parts. And finally drawings of the proposed mobile wood splitter.
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Design of the hydraulic circuit of the ASC 110 vibratory roller drive
Novák, Martin ; Rada, Zdeněk (referee) ; Rada, Zdeněk (referee) ; Klas, Roman (advisor)
This thesis presents a proposal of newly designed concept for travel hydraulic circuit of vibratory single drum roller ASC 110. The maximum machine gradeability was chosen as the main parameter for hydraulic circuit proposal. After selecting the new hydraulic travel concept, suitable hydraulic components have been selected. Length and local losses for two different machine speeds were calculated for sufficient hydraulic circuit design. Hydraulic losses have also been calculated for use in different climatic conditions. A new machine cooling concept has also been proposed. Heating and cooling curves of hydraulic circuit were calculated. For the purpose of comparing gradeability and energy balance of the newly designed travel concept compared to the existing one currently in mass production, both machines were fitted with measuring points. On both machines were measured for example, pressure, flow and temperature in each hydraulic circuit branch and others. From the time dependencies of the above-mentioned parameters it was possible to determine the energy efficiency of the newly designed concept. To assess the maximum gradeability, the slope of the hill was measured. Comparing the two machines, it has been found that the two hydraulic circuit solution has significantly improved traction properties in demanding machine applications, especially when driving uphill and downhill. This concept also affects less fuel consumption and places less demand on the hydraulic oil cooler due to its energy efficiency.
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Structure Optimization of Electro-Hydrostatic Actuator for General Aviation Aircraft
Kraus, Jan ; Němec, Zdeněk (referee) ; Rousek, Miroslav (referee) ; Třetina, Karel (advisor)
The use of only one primary sort of energy is the present trend of aircraft design and its force systens. There are designed electromagnetical force systems for control of ther moving parts of aircraft structure. Great demands are laid on energy and dynamic characteristics at some force systems, especially at aircraft control system, and therefore there are developed electro-hydrostatic actuators, suitable for aircraft for aircraft control system, which could graduallly replace commonly used hydraulic servo-controol system. Not only electric signals but also required electric outputs are led into these electro-hydraulic actuators. Using a hydrostatic converter it is changed into mechanical output controlling the aircraft control system. The goal of work is to set requirements for characteristic and conception of electro – hydrostatic actuators for aircraft control systems. Further, on the basis of theoretical analysis , computer modeling and experiment, the design optimisation of electro-ghydrostatic actuator should be done for small business aircraft from the point of view of dimmensions and dynamic characteristics.
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Double drum synchronized control of hydraulic vibratory roller ARP95
Novák, Martin ; Rada, Zdeněk (referee) ; Klas, Roman (advisor)
This thesis presents solution of synchronized two smooth drum steering of tandem vibratory roller ARP 95. During the development of this machine was found insufficient synchronization of two drums. The above-described problem was solved by modifying the steering block. The correct evaluation of data measurement and understanding of the machine behaviour led to elimination of the problem. The main result of this thesis is elimination of unsynchronized behavior of two drums. Thanks to this was achieved maximum deviation between two drums 0,2°. Synchronized steering is very important for modifying the surface of the asphalt roads around the sidewalks and currently the machine ARP 95 produced by AMMANN is the top of the market when it comes to the synchronized steering.
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Actions on bridges caused by the water flow and floating items
Řezník, Jindřich ; Duchan, David (referee) ; Špano, Miroslav (advisor)
The subject of this thesis is the enumeration and analysis methods applicable to the calculation of loads on bridges from water and water-borne objects. It involves a hydrodynamics loads, loads from captured debris and from impacts of the individual water-borne objects and their clusters. It includes an assessment of the current situation, the teoretical analysis and model calculations on the concrete bridge with the evaluation of usable methods.
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