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Možnosti snižování nákladů u traktorových souprav na zpracování půdy
Fajmon, Jiří
The thesis on the theme-Possibilities of reduction costs by tractors kit for treatment of soil-is giving us in the theoretic part basic information about construction of nowadays tractors, possibilities its traction and effectiveness of use. It deals with economy of treatment of soil primarily with energy demands and effectiveness tillage. In the practical part of this thesis is processed field measurements, which was made for purpose to evaluate usage of traction hydraulic cylinder plough. It was investigated how the features of traction cylinder are influencing fuel consumption, traction of wheel and efficiency of tractors kit.
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Vnější hydraulické okruhy traktorů
Dvořák, Petr
The purpose of this bachelor thesis is to acquaint the reader with the external hydraulic cir-cuits of tractors. The bachelor thesis is divided into three parts. First part briefly summariz-es development of hydrostatic circuits in tractors. Second part is focused on functional and control elements of external hydraulic circuits. Furthermore, the electrohydraulic control system and the Load sensing system are described here. The final part of the bachelor thesis deals with possibilities of tractor hydraulic system diagnostics with the help of its external hydraulic circuit.
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Stanovení polohy těžiště zemědělského stroje
Židek, Martin
This bachelor's thesis solve the issue of center of gravity of agricultural machinery, specifically agricultural tractor. The purpose of thesis is: describe methods of research center of gravity, design new method and describe the reasons why is important to know the position of the center of gravity. In the experimental part, I measured the tractor model and then by using calculations I found the center of gravity. During the measurement of the center of gravity, I followed the Articles of Association resulting from the CSN 30 0415. All the calculations was interleaved by the method of least squares. I analyzed the results of the measurements at the end of this thesis.
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Analýza silových účinků pluhů na výstupní parametry orebních souprav
Slimařík, Dušan
The aim of this thesis is force effect analysis of ploughing rigs. MSC Adams software was used for mathematical-physical model drafting and subsequent evaluation of measured data from tensometrical load sensing. Designed model was utilized for force reactions calculations under the driving wheels of a tractor using analysis of spatial system of forces of tractors three point hitch. Field measurement data and data from MSC Adams software were tabular and graphically processed. Dependencies between plough and tractor connection setting and output performance of ploughing rigs were clarified. Results from experimental measurement with fully-mounted plough point out on the utilization of longitudinal and lateral position of ploughs CG for reducing of difference in load between furrow and land wheel with properly adjusted connection between plough and tractor. A result from experimental measurement with semi-mounted plough confirms the fact of significant difference in vertical load between rear axle wheels. This negative phenomenon could be eliminated with usage of traction cylinder localized in construction of semi-mounted ploughs over the horizontal joint. Correct adjustment of tractors three point hitch in case of fully-mounted ploughs and utilization of traction cylinder in case of semi-mounted ploughs have got positive influence on fuel consumption and field performance of ploughing rigs.
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Sledování závad na STK traktorů vybrané výkonnostní skupiny
HOFMAN, Marek
This bachelor's thesis is focused on monitoring defects in tractors that were brought to the technical inspection station for regular technical inspection. The introductory part of this work describes the most important laws, regulations and decrees that regulate the implementation of regular technical inspections of the monitored type of vehicles. In the practical part, the most common faults in the selected performance group of tractors are evaluated. Finally, the differences in the detection of defects in tractors compared to trucks are described.
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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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Vliv huštění pneumatik na výstupní parametry traktorové soupravy
Dvořáček, Vojtěch
The thesis dealswith tractortires. It shows the different types of tires used in agricultural machinery. This work also includes field laboratory measurements. Theme asurement examines the dependence of the tire pressure on the output parameters of the tractor set. The examined output parameters were operational and efficient performance and operational and efficient fuel consumption. The controlled variable in the set was the tire pressure in the tractor. Values were recorded for the different tire pressure values. The measurement results are graphically represented and commented on.
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