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Concept of the mulcher for aggregation with a tractor 55 kW
Anders, Horst ; Fajkus, Pavel (referee) ; Kašpárek, Jaroslav (advisor)
This bachelor thesis is focused on the conceptual design of a universal horizontally adjustable mulcher. The mulching process, its advantages and the mulchers supplied to our market are described in the thesis. The mulcher is designed according to the assigned power parameters and characteristic working range. The thesis contains partial functional and force calculations of the nodes selected by the contract owner and separately designed units, including components supplied by other manufacturers.
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Electric Drive Diagnostics and Utilization in Agricultural Machinery
Čedík, Jakub ; Pexa, Martin (advisor) ; Kumhála, František (referee)
This doctoral dissertation thesis deals with rotary mowers, specifically with the issue of mulching.
In the theoretical part the reader is being familiar with the technology of mulching and its importance. Further, the individual types of mulchers and its advantages and disadvantages are described. The literary analysis of energy demands of rotary mowers is stated. Further, the parameters influencing energy demands of the mulcher are also analyzed.
The results of measurement of the energy demands of the mulcher with vertical axis of rotation are presented. The dependency of input power, specific energy consumption and fuel consumption on mass performance of the machine are created. Furthermore, the energy demands was determined, while mulcher was working continuously at the permanent grassland. The energy losses of the mulcher were also analyzed.
The effect of modification of operational and constructional parameters on the energy demands and quality of work of the mulcher wit vertical axis of rotation is studied. From the constructional parameters the shape of working tool, especially cloth angle and rake angle of the tool, and shape of the cover of the mulcher workspace is modified. From the operational parameters the cutting speed and mass performance according to conditions is modified.
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Optimizing the shape of the mower´s cover in terms of airflow at different arrangement of blades
Mihula, Lukáš ; Novák, Petr (advisor) ; Chyba, Jan (referee)
The aim of this thesis is to create a contemporary overview on the issue mulching using contemporary Czech and foreign literature. In the chapter Mulching is described in this technology and distribution mulchers and theoretical principle of their function and possible uses. The section Methodology already contains the actual description of the construction of the model shredder Vertical axis and a theoretical description of the pressure measurement using pressure strips on the mower housing. The actual results of the measurements and their interpretation, see chapter "Measurement Results". Subsequent comparison of measured values is described in Comparison of results. In the last chapter, Economic assessment is a calculation of unit costs set mower with energy means.
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