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Strength analysis of a chisel cultivator
Nejman, Jan ; Binar, Luboš (referee) ; Kašpárek, Jaroslav (advisor)
Introduction of final thesis deals with description of difficulties which face agricultural machines for soil processing in public traffic. It is followed by control calculations of tractor hitch and Failure Mode and Effect Analysis. Second part contains brief description of exact machine type and its main components. Following part is concerned about security and legislative requirements for transportation of carried cultivators on roads. For more this part describes, experimental measurement and calculation of dynamic loads, which are further used as input for strength analysis. Fifth part describes preparation of numeric model, strengths analysis of original frame and following sixth part brings frame editing and results of strength analysis with additional minor changes.
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Vyhodnocení vlivu orby a hloubkového kypření na strukturu porostu a výnos zrna pšenice
Pokorný, Vít
This thesis deals with the effect of plowing and subsoiling on the structure of the spring wheat crop and the quality of spring wheat grain, as well as the effect of these two technologies on soil compaction. The literature review briefly describes basic information about soil and soil compaction, as well as necessary information about the plow and subsoiler and necessary information about spring wheat. In the practical part of this thesis, undisturbed soil samples were taken and evaluated, and the penetrometric resistance of the soil was measured, before and after tillage using the monitored technologies. Compaction has not been found. However, it was confirmed that subsoiling has a positive effect on the soil physical properties, despite the fact that there was no improvement in pentrometric resistance and soil moisture. Furthermore, the condition and structure of the spring wheat crop were evaluated, the results showed that at first plowing was better but before harvest subsoiling showed better plant density, and finally the yield and quality of the wheat grain were evaluated and compared. Plowing also came out better from this, despite the fact that subsoilling achieved a better number of plants and ears per m2. The field experiment took place in Jaroměřice nad Rokytnou in the local part of Vacenovice.
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Technicko ekonomické hodnocení traktorových souprav na zpracování půdy
Staněk, Jindřich
The diploma thesis Technical-economic evaluation of the tractor set is focused on the construction of tractors and machines for tillage used in agriculture. The first part presents the current state of construction of tractors and machines used in agriculture for tillage, which are supplemented by pictorial illustration. The second part of the thesis is focused on the methodology of field measurement by the tractor set New Holland T7.315 HD AutoCommand and chisel cultivator Maschio Gaspardo Artiglio S 300/7. For the tractor set, the output values were monitored at different parameter settings.
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Strength analysis of a chisel cultivator
Nejman, Jan ; Binar, Luboš (referee) ; Kašpárek, Jaroslav (advisor)
Introduction of final thesis deals with description of difficulties which face agricultural machines for soil processing in public traffic. It is followed by control calculations of tractor hitch and Failure Mode and Effect Analysis. Second part contains brief description of exact machine type and its main components. Following part is concerned about security and legislative requirements for transportation of carried cultivators on roads. For more this part describes, experimental measurement and calculation of dynamic loads, which are further used as input for strength analysis. Fifth part describes preparation of numeric model, strengths analysis of original frame and following sixth part brings frame editing and results of strength analysis with additional minor changes.
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Functional properties of tillers working tools
Hamouz, Karel ; Hůla, Josef (advisor) ; Novák, Petr (referee)
This theses provides an overview of tillers´ working tools used in current tillage technologies for soil loosening to varying depths. A more detailed overview was made to describe current solutions for the design of tillers for shallow and medium depths. Literary insights into the quality of work and energy requirements of tillers´ working tools are presented. The work also includes the results of field measurement of draught force and quality evaluation of the work of three selected prototypes of chisel tines. This results were used to find out the relationship between specific draught and soil-aggregate size distribution on different widths of chisels and their working depth. For all widths of tines, a significant growth in specific draught was found with increasing working depth. The specific draught significantly correlated with the cross-section area of the loosened soil (correlation coefficient 0,808).
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