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Mechanical-hydraulic model of vehical energy regeneration
Pisklák, Jan ; Vrbka, Martin (referee) ; Nevrlý, Josef (advisor)
This bachelor thesis is a research about mathematic-physical model of vehicle’s kinetic energy regeneration. Mr. Pourmovahed A. et al. were dealing with this problem. He used the method of the determinated thermal time constants. Pourmovahed continued in study reports written by Green W. L. and Otis D.. His scientific work covers the analytical treatment which is compared with an experimental tests.
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Theory of pneumatic car design
Stodolák, Martin ; Robenek, Dětřich (referee) ; Nevrlý, Josef (advisor)
This thesis covers the theoretical solution of the compressed air powered vehicle. The first section describes the competition of the compressed air powered vehicles, that is annually held in Hungary, where the idea for such a car design was created. There are also additional descriptions of the construction of the machines from the hungarian competition. In the second section there is a calculation of the chosen vehicle construction, where the main emphases is based on the calculation of the drive of the vehicle. The description of the manufacturing, tests and vehicle presentation follows.
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Experimental apparatuses for studying rolling contact fatigue life
Popelka, Ondřej ; Nevrlý, Josef (referee) ; Šamánek, Otakar (advisor)
The bachelor thesis consist the overview of experimental fatigue apparatuses that are designated for the lifecycle fatigue study of machine parts. It describes two basic devices, discs machines and rolling element machines. The specific of these devices is their use for study of fatigue damage resistance of machinery materials. Their disadvantage is non-complexity and limited possibility of usage. They are designed for basic tribological research (e.g. point contact, line contact, etc.). Complex experimental fatigue apparatuses are often expensive so they can’t be used in regular study.
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Design of valve block for hydrostatic recuperative module of vehicle
Ranuša, Matúš ; Robenek, Dětřich (referee) ; Nevrlý, Josef (advisor)
The Master`s Thesis deals with design and construction of a valve block for a hydrostatic recuperative module of a vehicle with a direct application on pneu tyred roller AP 240H produced by the AMMANN company. The thesis aims to analyze recovery functions of the valve block in several operating modes of the roller, followed by a selection of the right hydraulic components from the perspective of predefined parameters and pressure differences. Design specifications are based on measurements and mathematical simulations on the experimental stand. The experimental stand for this application has been developed at 1:4 scale as compared to a real vehicle. The thesis includes also design of the supporting console for the module on the frame of the vehicle. The Master`s Thesis is a part of project EUREKA with cooperation Bosch Rexroth.
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Hydromobil - design of mechanical-hydraulic recovery of car kinetic energy
Stodolák, Michal ; Robenek, Dětřich (referee) ; Nevrlý, Josef (advisor)
This diploma thesis deals with the structural design of a vehicle powered by pressure fluid that is stored in a hydraulic-pneumatic accumulator. The first part described the types of energy recovery, especially hydraulic recovery. Furthermore there are outlined basic parameters of the design of the vehicle driving mechanism. The second part describes the design of hydromobile with emphasis on the chassis, especially the driving and braking system. Additional information on the individual parts of the chassis, that are put through the stress analysis. The final part deals with the actual manufacturing of the hydromobile and is followed by the resume of the thesis.
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Methods of Reliability Analyses of Operation and Testing Data of Airplanes
Novák, Josef ; Nevrlý, Josef (referee) ; Nejedlý, Ludvík (referee) ; Třetina, Karel (advisor)
The doctoral thesis deals with reliability (dependability) analyses of operation and testing data of the Airplanes. Requirements of airworthiness regulations on aircraft hydraulic systems (with a focus on US FAR-23 and European CS-23 regulations) are taken into account. Mentioned regulations include requirements for the structural design, design of systems, etc. They cover wide range of airplanes from small sport airplanes to 19-seats transport aircraft. Also options for predictive reliability analyses (resources) and reliability tests are discussed in the doctoral thesis. Practical application is done on small transport airplane (currently in the development). The failure report is designed. Expected major contribution of the work is selection and practical application of the most suitable procedures for safety assessment on the field of aircraft hydraulic systems, with a focus on the small transport aircraft. Also the comparison to different data source is shown.
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Optimization of hydraulic system for milling machining center
Smíšek, Tomáš ; Ranuša, Matúš (referee) ; Nevrlý, Josef (advisor)
The bachelor thesis is focused on the design of optimized solution of the hydraulic system for milling machining centre. The main points of this work are to assess the current condition, design optimization solutions, construction calculations, final optimized solution and summary of the optimization. The contracting company is HYTEK Ltd. dealing with construction of hydraulic equipments.
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Design and manufacturing of patented bowling ball equipped by submerging grasp
Plachý, Ladislav ; Nohál, Libor (referee) ; Nevrlý, Josef (advisor)
The purpose of this bachelor thesis is design of mechanical elaboration and manufacturing of patented bowling ball equipped by submerging grasp. The introduction is about given task and it shows a possible solution. In the next part of thesis are described different mechanisms which can be used inside of the ball. Third part is about design of every single component, choice of its material and about other properties which are necessary for the correct function of suitable system.
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Contemporary design of rotary compressors, prevention of their surge
Kopáček, Petr ; Roupec, Jakub (referee) ; Nevrlý, Josef (advisor)
The bachelor’s thesis deals with design of rotary compressors with analyse prevention of their surge. The first part is concerned with description of basic terms, which are important to understanding studied problem. Then, attention is given to literature, from which are gathered needed data. A description of design of rotary compressors aimed at prevention of surge follows. After that, the thesis is focused at antisurge control of rotary compressors, with consideration to Greitzers model.
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