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Evaluation of combine harvesters John Deere 670i and Claas Lexion 770
JURÁSEK, Martin
This bachelor thesis evaluates the John Deere 670i and Claas Lexion 770 combine harvesters in terms of cost, threshing quality, losses and area performance. The thesis describes the functions of the combine harvesters and their technological description and practical applications. The parameters calculated in the bachelor thesis are pre-harvest and harvest losses, area and weight performance, mass yield, travel speed, crushing quality, fuel consumption and fixed and variable costs.
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Porovnání hybridních sklízecích mlátiček Claas Lexion 8700 TT a Claas Lexion 770
BAJER, Matěj
This bachelor thesis deals with the comparison of Claas Lexion 770 and Claas Lexion 8700 TT hybrid combine harvesters. These machines are compared in the thesis in terms of losses, fuel consumption, economic parameters, performance and throughput. The result of the comparison of economic parameters is a turning point diagram, which determines which combine harvester pays off depending on the hectares harvested. The turning poing diagram also shows a comparison of whether it is worthwhile for the enterprise to own the harvester or whether it is more profitable for the enterprise to hire harvesting services. All the information and documents needed for this comparison were collected during the harvesting season at AGRO, družstvo Záhoří and were obtained through a number of experiments during the work of the harvesters. As the machines are similar in terms of performance, this work is also intended as a comparison of the improved threshing system of the Claas Lexion 8700 TT with the older system of the Claas Lexion 770.
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Model ranges analysis of threshing machine
Palík, Milan ; Pokorný, Jan (referee) ; Kašpárek, Jaroslav (advisor)
The scope of this bachelor work is to give the basic information and explain the functionality of particular harvester thresher mechanism and confront their synthesis and product mix from different producers. The agricultural engineering sale is large and that is why the first step of the usage will be the company literature and then professional magazines will be given. This work is mainly made through the use of visual documentation, which afford explanation of existing mechanics principle, their particular structural design and summary of producers. Then there will be mentioned their percent sales representation and the confrontation according to the efficiency classes. The attention will be first of all paid to the best in this field, for example to the companies, which are engaged in picking engineering production for cereals, as are for example companies Claas, Fendt. Case IH or New Holland.
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Crop flow improvements at the Power Flow header
Štelcl, Michael ; Červinka, Jan (referee) ; Kašpárek, Jaroslav (advisor)
The master's thesis is focused on a design of optimal working speed of auger and belt transporter which are parts of Power Flow header for standard type of combine harvester. In the master's thesis author suggest a new simplified theory of crop flow inside the Power Flow header. The thesis contain the factors which can affect the crop flow and comparison between the Power Flow and competitor's header. The thesis also contain geometrical characteristics of crop for four types of cereal.
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Threshing system of combines harvester
Štelcl, Michael ; Červinka, Jan (referee) ; Škopán, Miroslav (advisor)
This bachelor thesis is about evaluation of maximum throughput of straw and grain together, in various types of threshing units which are used in combine harvesters. It provides basic informations about two types of combine field-test procedures. In the end of work is shortly describe current development of combine harvesters and contain two proposals of alternative constructions of threshing units according to author of this bachelor thesis.
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Teorie a konstrukce mlátících ústrojí sklízecích mlatiček
Remeš, Jan
The thesis describes the history and the history of threshing grain combine harvesters. The paper describes the types of threshing unit. They are given energy indicators, the main technical data threshing system and their calculation. The paper gives an overview of the performance categories, sales, capital costs, operating costs and on the percentage of combine harvesters on the market today. The following describes the structure threshing device manufacturers marks Case, Claas, John Deere and New Holland, and there is shown a graphical comparison of their technical parameters. The work describes the mass flow threshing mechanism. Theoretical calculation is expressed by the dependence of flow quantity on the length of the threshing drum and then compared with the actual measured values.
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Tvorba výnosových map pomocí sklízecí mlátičky JD T660i a jejich další využití
PODHOLA, Matěj
This bachelor thesis is focused on the creation of yield maps, their use and application for variable fertilization. This work briefly describes the JDLink system and its use, summarizes the sensors of the device that transmits data to the system and the description of JD660i combine harvester. Furthermore, attention is paid to land yields, assessments, and subsequent comparison of variable and conventional agriculture.
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