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Stroje pro sklizeň píce: příprava výukových materiálů
ZUKAL, Martin
This bacalar thesis provides an overview of forage harvesting machines. The thesis is divided into chapters according to individual types of machines and provides a view of their agrotechnical requirements, partition, description of basic carried out operations and description of their basic work. The bacalar thesis should serve as supplementary teaching text for students of the Department of Agricultural, transport and handling Technology of the Faculty of agriculture of South Bohemian University. Information and parameters are found in the technical literature on agricultural machinery, promotional materials and websites of manufacturers and vendors of this technique.
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Ověření výkonnosti harvestorové technologie rozdílných pracovních činností při těžbě lesních dřevin
LIEBL, Karel
This Master's thesis deals with harvester technology used for forest harvesting, mainly with its efficiency (performance). The thesis describes various types of harvesting in which harvesters are used the most and compares their usage for forest harvesting with the usage of chainsaws. Efficiency is very closely related to the series of inner and outer factors, which influence it both positively and negatively. The impact of these factors is evaluated based on the individual cycles during the harvest and field observations during the variety of harvesting operations. Amongst the most prominent factors are for example operator's experience, type of harvested wood and its characteristics, engine power, performance of hydraulic systems, type of chassis, terrain quality or the influence of meteorological conditions. The aim of this Master's thesis is to perform all necessary measurements and, while using corrected coefficients, alter the calculation of theoretical efficiency to correlate with the actual efficiency.
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Hodnocení sklízecí mlátičky JOHN DEERE S 680 s pásovým podvozkem při sklizni obilovin, řepky olejné a kukuřice
PILÁT, Jiří
The content of this thesis is evaluation of the JOHN DEERE S 680 combine harvester with tracked chassis, during harvesting grains, rape and maize. The theoretical part of my thesis is at first focused on the basic structural design of the combine harvester. In the second part it describes harvesting of maize using a combine harvester, mainly from the technological point of view. The practical part first describes the methodology, where are listed procedures and calculations required for the evaluation of a combine harvester. Furthermore, it contains the final evaluation of the quality of work of the combine harvester in terms of loss, throughput, the quality of crushing and dispersion of crop residues, fuel consumption, performance analysis, as well as the influence of tracked chassis on the performance of the combine harvester.
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Hodnocení sklízecích mlátiček CLAAS LEXION 780 při sklizni obilovin a řepky ozimé v podniku zemědělské prvovýroby
ROUČKA, František
This Bachelor thesis, with main topic of global reviewing exact harvesters Class Lexion 780 during harvesting cereals and winter rape in primary agricultural company, deals with actual and present summary about harvesting a separating apparatus used in those harvesters. It also mentions individually designed units used inside of harvester Claas Lexion 780. Theoretical part of this thesis ends with chapter focusing on mowing adapters for harvesting cereals and it is complemented with simple description of belt using harvesting adapter produced by MacDon company. Practical part of this thesis deals with methodics and measuring results related to harvesting quality in terms of losses, grinding quality and spreading afterharvesting leftovers, efficiency a consumption. Thesis is also complemented with agricultural operation characteristics and simple investment and running analysis.
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Hydrostatic travel drive for harvester
Dano, Matej ; Juřík, Josef (referee) ; Škopán, Miroslav (advisor)
The object of this master’s thesis is design of a suitable hydrostatic travel drive for harvester. The first part dedicates of constructions of harvesters and actual different conceptions of travel drive. Next, there are design of hydrostatic circuit, calculation of general hydraulic parameters and design of hydraulic components in the second part. The last part deals with issue of combustion engine and cooler.
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Design of micro drive for harvester
Jonák, Vojtěch ; Pokorný, Jan (referee) ; Škopán, Miroslav (advisor)
This master thesis deals with design of hydrostatic drive for harvester. It contains calculations of parameters from current drive like speed, hydraulic losses and tractive effort. Because now these parameters are insufficient in next part of work is proposed few options how to achieve required parameters. In selected cases are made calculations and based on the results are recommended two options for realization.
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Design of Harvester
Cimbál, Martin ; Chorý, Tomáš (referee) ; Křenek, Ladislav (advisor)
This thesis focuses on design solutions for the Harvester. It is a machine designed for the extraction of timber in large quantities. Its major place of employment is in coniferous forests. The machine is able to cut down the tree, remove branches from the tree and cut it into requested segments suitable for the removal and all in one step. The main aim of the thesis is to create an original shape solution for the Harvester, a machine for the wood harvesting, with a view to future development. The total concept is based on the present progressive, constructional technology solutions. Machine design is based on the the fundamental ergonomic requirements that make it easier for drivers to work. In the proposal I use a combination of a wheeled harvester with a walking robot design.
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The engine unit of forestry harvestor
Petr, Tomáš ; Škopán, Miroslav (referee) ; Kašpárek, Jaroslav (advisor)
At the beginning of bachelor´s thesis is description of harvester and its main parts. Then research of four six – wheeled forestry harvesters was developed. Features of compared harvesters are similar to the task. The next point was theoretical part with equations needed for calculation of rolling and inertial resistances. Based on the theory an enumeration of powers of particular driving modes was done. Then performances for work devices of harvester were calculated. From the single values were determined total powers of machine, which were transparently organized into table and graph. Based on the maximal total power were chosen three appropriate engines. From the three was selected the most suitable one.
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Crawler chassis for a forwarder
Plichta, Zbyněk ; Kašpárek, Jaroslav (referee) ; Škopán, Miroslav (advisor)
The first part of the bachelor´s thesis introduces crawler chassis used in forwarders and harvesters, its second part includes a concept design of a crawler chassis for a forwarder based on the given parameters. The design concentrates on the arrangement of the undercarriage and the choice of suitable track and idlers. Another intention of the design is to find an appropriate solution for suspension of bottom rollers with a sufficient travel, while observing small dimensions of the undercarriage. The outcome of the thesis is a drawing of the designed crawler chassis.
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