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The design of a mobile wheeled chassis
Král, Filip ; Škopán, Miroslav (referee) ; Kašpárek, Jaroslav (advisor)
This thesis is concerned with designing the construction of a mobile wheeled chassis for transport machinery to specifically forwarder. The proposed construction is modeled in Autodesk Inventor . The proposed solution is checked by analytically functional computation and control by strength calculation too . On the basis of the proposed construction design is created drawing documentation , which include selected parts of the chassis .
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Handling equipment for forestry
Martinec, Patrik ; Pokorný, Přemysl (referee) ; Hloušek, David (advisor)
This bachelor thesis is focused on a research treatise on a forest fleet. The beginning of the work outlines the historical development of machines in the woodworking industry, it also deals with harvesters and their individual division according to specifications. The work also focuses on important parts of the harvester such as the hydraulic crane and harvester head. In the same spirit of comparison and division, export tractors are developed in the work. The chapter of the last work summarizes wheel loaders and their use in the woodworking industry. At the end of the thesis, the individual goals and outputs of the bachelor's thesis are evaluated.
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Handling equipment for forestry
Martinec, Patrik ; Pokorný, Přemysl (referee) ; Hloušek, David (advisor)
This bachelor thesis is focused on a research treatise on a forest fleet. The beginning of the work outlines the historical development of machines in the woodworking industry, it also deals with harvesters and their individual division according to specifications. The work also focuses on important parts of the harvester such as the hydraulic crane and harvester head. In the same spirit of comparison and division, export tractors are developed in the work. The chapter of the last work summarizes wheel loaders and their use in the woodworking industry. At the end of the thesis, the individual goals and outputs of the bachelor's thesis are evaluated.
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Posouzení provedení prvních probírek dle velikosti použitého harvestoru s dopadem na budoucí růst a potenciální výnos z porostů
Suda, Ondřej
The thesis deals with the appropriateness of using two different combinations of harvester´s system for stand tending. The aim was to quantify differences using harvester´s system and found out which is more appropriate for intervention. The difference in the number of felling trees is using as key parameter. According to results is better for future development of stand using harvester´s which will create closer segmenting lines. The rest of trees in stand mean greater possibility of selection for subsequent thinning and higher possibility of yield in other interventions due to greater volume.
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Technicko-ekonomické parametry harvestorového uzlu s mobilním trakčním navijákem
Černý, Lukáš
The dissertation explores the work with harvester technology with a mobile traction winch in sloping terrains. It deals with the efficiency of these machines in their technological varieties. A time measurement study was undertaken in the dissertation which studied the work of a harvester with a mobile traction winch and without a mobile traction winch during the toll logging of a centennial spruce stand. The time study was performed in eastern Slovakia to establish the differences in time consumption during the work cycles. Some minor differences had been detected during work tasks, however, these did not exhibit any effect on the mobile traction winch in the work cycles of logging one tree. Furthermore, the time study measured the effect on any changes in work productivity, which is required during the operation of the mobile traction winch. Besides the harvester, a time study of a forwarder with a mobile traction winch has been compiled. To establish the effect on the forrest environment of the harvester technology and the mobile traction winch, an evalution of damage to the soil in two technological varieties was performed in Slovakia and the Czech republic. The technological variety with a mobile traction winch was less damaging to the soil surface due to the prevention of wheel slipping destpite the fact that the overall results of soil damage were negative. An operating cost analysis has been worked out to complete the study, which has shown the technological variety with the mobile traction winch to be more costly due to the purchase price of the winch and the higher fuel consumption. The main advantage, however, is safety, not cost savings.
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Rozbor harvestorových technologií lesní těžby na LS Telč LČR s.p.
Jelínek, Vladimír
Tato bakalářská práce má za cíl seznámit s hlavními znaky harvestorových technologií lesní těžby, s faktory a kritérii nasazení těchto technologií. Na základě zvolených kritérií posoudit jejich dosavadní a perspektivní využití s vlivem na lesní prostředí na zájmovém území. Dalším úkolem této práce je orientačně posoudit konvenční technologie lesní těžby z pohledu uplatnění na zájmovém území.
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Identifikace a posouzení faktorů ovlivňujících okamžité tlaky v půdním profilu vyvolané přejezdy vyvážecího traktoru
Mutina, Michal
In forestry are used heavy wheeled machines which create noticeable pressure on the soil by landing gear. Traversing machines cause damaging roots, root swellings and especially soil compaction. This thesis deals with the assessment and comparison of factors affecting the immediate pressures in the soil profile caused by crossing forwarders. Two machines are considered, the first one with load capacity 5t and the second one with load capacity 12t. The technical features of the machine, tire width, tire inflation rate and technological influences, putting brushwood on the path of crossing forwarder were assessed. The results indicate that the use of logging residues on the path of forwarder effectively reduces the immediate pressures in the soil.
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The design of a mobile wheeled chassis
Král, Filip ; Škopán, Miroslav (referee) ; Kašpárek, Jaroslav (advisor)
This thesis is concerned with designing the construction of a mobile wheeled chassis for transport machinery to specifically forwarder. The proposed construction is modeled in Autodesk Inventor . The proposed solution is checked by analytically functional computation and control by strength calculation too . On the basis of the proposed construction design is created drawing documentation , which include selected parts of the chassis .
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Posouzení vlivu mechanizovaného soustřeďování dříví na půdní povrch
Černý, Lukáš
This Bachelor thesis deals with the measurement and evaluation of the immediate pressure in the soil after heavy machinery for the gatheriing of logs travels over it. It further looks into the method of measuring damage to the soil and trees in the forest cover after the logging operation. Measurement of immediate pressures was carried out at the Training Forest Enterprise of Masaryk Forest Křtiny. The prototype machine forwarder Novotný LVS 720 and the universal wheeled tractor Zetor Proxima Plus 8541 were assessed on the same type of soil with similar natural conditions. The results of the measurements proved that the protopype forwarders produced less immediate pressures during the transport of heavier loads than the universal wheeled tractor. The classical technology and CTL technology were evaluated for the measuring of damage to trees and soil in the forest cover at the areas of Telč and Plumlov. It was again confirmed that the CTL technology is more gentle to the environment of forest cover.
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