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Design of Passenger Car Wheel
Kapoun, Lukáš ; Porteš, Petr (referee) ; Hejtmánek, Petr (advisor)
The present master thesis deals with the design of wheel disk for passenger car. The review part of this thesis summaries the history and development of the wheel; this is followed by a description of individual construction types of wheel disk for passenger car presently used. The construction part of this thesis provides a design of disk of given parameters based on the analysis of forces acting on the car wheel. For the purposes of design, the stress and fatigue analyses are performed.
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Hydraulic and mechanical holding device of front shovel of excavator LB 115
Bělov, Pavel ; Lžičař, Roman (referee) ; Škopán, Miroslav (advisor)
This Diploma thesis solves a quick coupler design for a loader. In introduction of the Diploma thesis are mentioned two potential designes and convenient solutions. Subsequently are outlined two practicable designes of a quick coupler for a original bucket, as a data componant of the second construction design is enclosed basic strength calculation. The ending point of the thesis deals and compare with the force decrease in use of a quick coupler and appraisals achieved ascertainment.
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Hydraulic rake screen - optimization
Milostný, Aleš ; Kašpárek, Jaroslav (referee) ; Malášek, Jiří (advisor)
The introduction of this Bachelor thesis is devoted to the problematic of rake screen cleaning. The next part describes individual device construction solutions. Continuing with geometry optimizations of the hydraulic controlled screen cleaning device and a force analysis based on positioning. In the end, optimal device dimensions are defined based on the size of the water intake and the geometry of the screens.
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Influence of three-point hitch parameters on traction properties of tractors
Voburka, Tomáš ; Škopán, Miroslav (referee) ; Bauer, František (advisor)
The diploma thesis is focused on the development of a mathematical model of the tractor-tool set in the MSC Adams program enabling analysis of the influence of the position of the upper linkage of the three-point hitch on the load of the driving wheels during the system operation. The measured force effects are analysed with focus on the adhesion load of the drive wheels and the traction properties of the tractor. Based on the calculations made, it determines the optimal setting of the upper link of the hitch for the connected tool.
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Computational Modeling of Dynamic Behaviour of Tractor
Hejčl, Pavel ; Řehák, Kamil (referee) ; Prokop, Aleš (advisor)
This work deals with the assessment of the effects of a rear-mounted mower on tractor dynamics. The first part summarizes knowledge of the used tractor suspension variants and their various modifications. Furthermore, the current possibilities for simulating the dynamics of tractors and the construction of the rear three-point hitch are described. The main part of the work is devoted to the assembly of the multibody model of the tractor with the rear-mounted mower. The correctness of the assembly of the virtual tractor prototype is verified by comparison with the technical experiment on the real tractor. The validated model is further used to analyse various well-defined steady-state and transient driving conditions typical of this set.
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Influence of three-point hitch parameters on traction properties of tractors
Voburka, Tomáš ; Škopán, Miroslav (referee) ; Bauer, František (advisor)
The diploma thesis is focused on the development of a mathematical model of the tractor-tool set in the MSC Adams program enabling analysis of the influence of the position of the upper linkage of the three-point hitch on the load of the driving wheels during the system operation. The measured force effects are analysed with focus on the adhesion load of the drive wheels and the traction properties of the tractor. Based on the calculations made, it determines the optimal setting of the upper link of the hitch for the connected tool.
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Hydraulic rake screen - optimization
Milostný, Aleš ; Kašpárek, Jaroslav (referee) ; Malášek, Jiří (advisor)
The introduction of this Bachelor thesis is devoted to the problematic of rake screen cleaning. The next part describes individual device construction solutions. Continuing with geometry optimizations of the hydraulic controlled screen cleaning device and a force analysis based on positioning. In the end, optimal device dimensions are defined based on the size of the water intake and the geometry of the screens.
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Relation between forces induced by fluid flow and dissipative processes in boundary layers
Mináriková, Petra ; Maršík, František (advisor) ; Lanzendörfer, Martin (referee)
Práce se zabývá vlivem disipativních proces· v mezních vrstvách, konkrétně vlivem viskozity tekutiny a dále vlivem difúze vodní páry ve vzduchu na vznik sil p·sobících na obtékaná tělesa. Z Croccovy věty plyne, že gradient entropie má sv·j podíl na vzniku cirkulace a d·sledkem toho i na vznik vztlakové síly. Práce zkoumá vznik vztlakové síly při obtékání rotujícího válce, v soft- waru FEniCS modeluje tuto situaci, porovnává s modelem nevazké nestlačitelné tekutiny a následně i s experimentem provedeným Ing. Zdeňkem Trávníčkem a Ing. Zuzanou Broučkovou. Taktéž zkoumá vznik vztlakové síly při vypařování na horní straně válce a srovnává s případem rotujícího válce. 1
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