|
|
Vliv změny tlaku v trakčním válci pluhů na zatížení hnacích kol traktorů
Opluštil, Jakub
The first part of the bachelor thesis is focused on the description of the construction of the plows and their current state. The second part of this bachelor thesis was to analyze the influence of the traction roller on the output parameters of the plowing unit based on field measurements. In the practical part of this work, a field measurement is processed, it was carried out in order to evaluate the use of the traction hydraulic cylinder on the plow. For a measurement it was used a tractor Zetor Forterra 150 HD in a set with a Pöttinger SERVO 45 M PLUS plow. The tractor was weighed in combination with the plow before the actual field measurement started. The weighing took place on walk-in scales. The axles were weighed as follows: front axle, rear right and left wheels separately, plow support wheel. It was measured in two variants, with a plow width of 1,6 m and 2 m. Furthermore, the measurement depended on the position of the set, which was in one case on a plane and in the other on an inclined plane. The tilting of the tractor was simulated on the scales, which was supposed to represent the driving of the tractor during the plowing to the right, the left wheel of the tractor and support wheel of plow were lifted by 20 cm. When the distributor of the external hydraulic circuit is in the floating position, there is zero pressure in the traction cylinder. There is no load transfer from the plow to the tractor. The weighing was based on three groups of measurements. In the first stage it was 0 bar, in the second 100 bar and the last 150 bar in the traction cylinder. As the pressure gradually increased, the tractor axles were loaded and the load on the support wheel was relieved. For a simpler representation, the obtained values were rewritten into images and drawn into graphs for comparison. The results obtained during weighing were compared with the results of individual wheel loads during actual plowing. By increasing the pressure in that the traction cylinder equalizes the load on the rear wheels moving in the furrow and on the bed. This fact was reflected in the output parameters of plowing.
|
|
|
Analysis of energy and performance parameters of tractor sets for tillage
Masnica, Daniel ; Porteš, Petr (referee) ; Bauer, František (advisor)
This diploma thesis analyzes the influences of individual components and settings on the performance and energy parameters of tractor sets. The theoretical part of the thesis focuses on tractor construction and describes some electronic systems used in modern tractors. It also describes the methodology of field measurements, measuring techniques, and machinery used for the measurements. The practical part of the thesis deals with field measurements of a tractor set with a combined cultivator, a plow, and traction tests of the tractor. From the measured data, various performance and energy parameters are calculated. The results are analyzed, and a discussion is provided.
|
|
|
Hodnocení technických a energetických parametrů traktorových souprav pro zpracování půdy
Janů, Radek
The bachelor thesis presents the current state of the construction of tractors. The attention is focused on tractor engines, especially tractor gearboxes - mechanical, hydrodynamic and hydromechanical. Last but not least, on electrohydraulic control systems of tractors. The method of field measurement of the kit Fendt Vario 924 tractor and plough Pöttinger Servo Plus 6.50 has been established in the next section. The measured results are presented in tabular and graphical form. It was found that correct use of traction roller plough can increase the effective performance of the kit Fendt Vario 924 and Pöttinger Servo Plus 6.50 by 0,33 ha.hod-1 and subsequently reduce the cost of ploughing of 1 ha by 138,6 CZK.
|
guest ::
