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Výškově nastavitelná oj postřikovače
JECH, Radek
This master thesis deals with the issue of connectivity of motor and non-motor vehi-cles with a deeper focus on the tractor, and the connectivity of non-motor vehicles using a fixed drawbar. In the practical part, the thesis deals with the design of a height adjustable drawbar of a sprayer using 3D design software. Using analytical calculations, the total force effects on the sprayer frame are determined and then the connecting elements are checked. The overall strength is checked using FEA analy-sis in Ansys Student 2024 software.
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Vliv seřízení palivové soustavy na spotřebu paliva a kouřivost motoru sledovaného traktoru po generální opravě.
HOFMAN, Marek
This thesis is focused on monitoring the parameters of a diesel combustion engine with different settings of the fuel system. In the introductory part of the work, the basic principle of work and a description of individual parts of fuel systems with an in-line injection pump are presented. The next part of the work describes the changes made in the fuel system settings, monitored engine parameters, and also presents the vehicles that were used during the measurements. In the last part of the work, the measured values are presented and evaluated.
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Alternativní paliva v zemědělství
HANEK, Martin
This work mentions the current alternative fuels that are used. It also contains the current state of agricultural technology that is powered by alternative fuels. Possibilities of fuel systems, their method and functions. At the end of the work, there is a consideration of which fuel would be possible and best to develop in the future.
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Computational Modeling of Dynamic Behaviour of Tractor
Hejčl, Pavel ; Řehák, Kamil (referee) ; Prokop, Aleš (advisor)
This work deals with the assessment of the effects of a rear-mounted mower on tractor dynamics. The first part summarizes knowledge of the used tractor suspension variants and their various modifications. Furthermore, the current possibilities for simulating the dynamics of tractors and the construction of the rear three-point hitch are described. The main part of the work is devoted to the assembly of the multibody model of the tractor with the rear-mounted mower. The correctness of the assembly of the virtual tractor prototype is verified by comparison with the technical experiment on the real tractor. The validated model is further used to analyse various well-defined steady-state and transient driving conditions typical of this set.
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Hybrid Drives in the Tractor Construction
Líčeník, Adam ; Řehák, Kamil (referee) ; Prokop, Aleš (advisor)
This bachelor’s thesis utilizes survey of types hybrid propulsion systems in the tractor construction. It evaluates its operational advantages and disadvantages and presents examples of some tractors and its elements. The thesis focuses on components which are used in hybrid propulsion systems. In the conclusion there is a review of individual variations in terms of emission and economy of operation.
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On the production of an agricultural machinery part and its optimization
Tenora, Tomáš ; Osička, Karel (referee) ; Píška, Miroslav (advisor)
This master's thesis deals with the process of machining a forged connecting rod in cooperation with the company Zetor Tractors a.s. The first chapter of the thesis is focused on a detailed introduction of the company. The second chapter includes an elaborate analysis of the technical documentation and requirements concerning the making process of the subject of study, specifically the construction of the connecting rod. In the third chapter, the current production technology is discussed and described in detail. The aim of the fourth chapter is to propose an innovative technology which can be used for the production of connecting rods in the required quality. The fifth chapter is aimed at testing the newly designed technology. In the final, sixth, chapter, a technical and economical evaluation of the proposed procedure is performed.
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Specifics of accidents Agricultural Technology
Tamáši, Adam ; Polcar, Adam (referee) ; Vémola, Aleš (advisor)
Master’s thesis focuses on the specifics of agricultural machinery accidents. The introductory part defines agricultural machines and its basic characteristics. It also analyzes specific technical regulations that govern the use of these machines in traffic. The experimental part then describes the methodology and interprets the results of conducted experimental measurements on driving dynamics of a tractor with carried accessory. These measurements consist of a break test in straight line, evasion manoeuvre and acceleration while turning left. The focus was given to not just the acceleration values, but also to the influence of the carried accessory, the load on the front axle or the tire pressure. The analysis of the findings made compares the results with the driving dynamics of ordinary passenger cars and provides a detail dissection of the most frequent causes of agricultural machinery accidents.
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Driving dynamics of a tractor
Renza, Jaroslav ; Bradáč, Albert (referee) ; Panáček, Vladimír (advisor)
This thesis analyses driving dynamics of tractors and its dependence on their weight and age. In the beginning, brief history of tractor development and definition of basic concept of the tractor analysis is described. The thesis states procedures for obtaining magnitudes necessary for determining of driving dynamics. Experimental part describes the realized measurement on chosen sample of tractors and interprets measured values. Last part of the thesis contains evaluation of the measurement results.
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Design of an Agricultural Tractor
Horáček, Radim ; Zdařil, Zdeněk (referee) ; Křenek, Ladislav (advisor)
The main subject of this master‘s thesis is an innovative approach to design of an ag- ricultural tractor with technical, esthetic, ergonomic and economic demands. The aim is to create a distinctive design and shape of tractor unbound from conventional solutions. The concept takes account of the farm–machine relationship, the alterna- tive powertrain, and friendliness to the environment.
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Tractor Shift Mechanism Analysis
Netopil, Jan ; Řehák, Kamil (referee) ; Prokop, Aleš (advisor)
The thesis focuses on the shifting mechanisms of manually shifted tractor transmissions. It provides a comprehensive overview of all significant structural nodes of the shift mechanism with an analysis of the influence of the structure on the resulting intensity of a force required for shifting. The main aim of this thesis is the design and validation of experimental equipment for measuring the force effects of the shift mechanism of a mass-produced tractor in actual operation. The design of the experimental equipment is based on a study of the used measuring technique and similar experimental equipment. The final structure is selected based on selection by the method of weighted values, taking into consideration the requirements of the structure. A functional measuring chain is designed and formed for the realization of the measurement. To evaluate the data from the technical experiment, a multibody model of the designed experimental device is created in the MSC Adams View software, through which the real parameters of the shift mechanism are obtained from the measured values. The designed experimental equipment brings the possibility of complete analysis and subsequent optimization of the tractor's shift mechanism
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