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Design of gearbox for wind power plant
Zavadil, Roman ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
The main goal of this diploma thesis is the design of a gearbox for a wind power plant. The introductory part contains a set of knowledge about wind turbine gearboxes and introduces the reader to the issue in terms of the distribution of gearboxes, gears used, recommended bearings and in terms of wind turbine generators. The design itself begins with determining the input parameters of the transmission based on a simplified aerodynamic model of the wind turbine rotor. Further, using these parameters, a device arrangement consisting of two planetary gears and one permanent gear. The entire transmission is examined in terms of kinematics, and in both planetary gears, the kinematic examination is performed using the Willis method. Then, the helical gearing is designed and its normal modulus, geometry, forces are calculated and lastly the strength calculation of the gearing is performed. Then the durability of the bearings is calculated based on a force analysis and the patented flexible pin construction is checked regarding its bending and deflection. The housing of the entire device is constructed regarding the smallest possible installation space in the control room. The final part of the work is devoted to the strength control of the bolts at the first ring gear using the finite element method and modal analysis of the entire gearbox also using the FEM.
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Vibration and noise of electric vehicles
Winter, Josef ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
This bachelor thesis deals with problematics with noises and vibrations else known as Noise, Vibration and Harshness (NVH) at electric vehicles type Battery Electric Vehicle. The attention is drawn to the powertrain system because the powertrain system was electrified. The goal of this thesis is to present sources of noise and vibrations and to show examples of experiments that are done on the vehicles to improve driving comfort of driver and passangers. In the end the measurement and analysis of noises and vibrations were done at electric vehicle by Hyundai from Institute of Automotive Engineering.
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Car differentials
Čapek, Štěpán ; Ramík, Pavel (referee) ; Kaplan, Zdeněk (advisor)
Technical solutions of car differentials. Description of the vehicle transmission system and types of differentials with their evaluation. Following active systems and active differentials with explanation of their function and summary of advantages and disadvantages of their application and use by individual car manufacturers.
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Analýza výstupních parametrů traktorových souprav na zpracování půdy
Židek, Martin
The diploma thesis on the theme Analysis of the Output Parameters of Tractors Kit for Soil Preparation contains in theoretical part actual survey of most important parts of the tractors. The diploma thesis further includes description of tractors CLAAS ARION 640 with mechanical speed gearbox HEXASHIFT and continuous hydrostatic gearbox CMATIC and description of plow PÖTTINGER servo 45S NP, which were all together elements of the practical part. The field measurement took place in Jiřice at Miroslav on Znojemsko in august 2016. This measurement is processed in the practical part, which focuses on comparing tensile characteristics of both gearboxes and determining their influence on the tensile properties of the tractor. Results were tabular and graphically elaborated and the analysis of measured values was performed.
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Hodnocení technických parametrů převodových ústrojí traktorů
Pročka, Martin
The bachelor thesis is focused on the evaluation of technical parameters of transmission system of tractors. In the introductory part of the thesis the transmission systems and their division will be stated. The construction layout of particular transmission systems will be described and accompanied by figures for better idea of the issues given. Advantages and disadvantages of concrete transmissions will be pointed out together with the explanation of their construction and principle of the function. Further the thesis deals with the parameters used for the computation of technical parameters of transmissions. In the subsequent part of the thesis two mechanical transmission partially shifting gears under load will be compared. It will be highlighted how important it is to select transmission system for concrete application. In conclusion the selected transmis-sions will be evaluated and the results summarised.
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Determination of sound power level of transmission
Švanigová, Lenka ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
The field of vibrations and associated noises is a very current topic. Noise can be measured with different equipment and the gained data might be compared using different methods, which are in accordance with defined norms. This bachelor thesis deals with the CSN EN ISO 9614 norm, especially its first part which focuses on the method of measuring in points. To apply this method to measure the transmission, basic terminology and formulas used to determine the individual indicators were described in detail. The whole procedure was applied to two industrial transmission units with different parameters and transmitted power. The total sound power on these sources was determined as well as the sound power levels for the individual measured sides, even without using the A-filter, which is the most commonly used filter in transmissions. Lastly, acoustic maps were created. These maps make it possible to discover locations which dominantly contribute to the total sound power level.
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Design of gearbox for electric motorcycle
Novotný, Tomáš ; Prokop, Aleš (referee) ; Svída, David (advisor)
The aim of the thesis is a summarization of current state of knowledge of motorcycle clutches and transmissions and subsequent design of clutch and transmission for electric powered motorcycle. The main topic is design of the clutch of which components were processed by stress analysis and designed for fatigue safety. On top of that, the thesis deals with the design of primary transmission and gear ratios.
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Analysis of Zetor tractor output parameters with different gearbox design
Orság, Josef ; Škopán, Miroslav (referee) ; Bauer, František (advisor)
This thesis deals with energetical and efficiency comparison of two tractor transmission types, used by the Zetor company. The description of transmission construction types of various tractor producers is given, with focus on Zetor tractors transmission construction. The laboratory methodology and operating tractor and tractor sets measurement is described. The individual results are introduced in tables and graphs and subsequently evaluated.
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Transmission of HPV
Martinát, Antonín ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
This diploma thesis concerns the design proposal for a bicycle gearbox powered by human force. The first part summarizes the existing solutions. The second part includes the proposal of the new design, together with the calculation of the strength for selected parts. Attached are the drawings documenting the findings.
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Noise Reduction Methods in Transmissions
Benda, Matouš ; Zubík, Martin (referee) ; Prokop, Aleš (advisor)
Transmissions are basic elements of cars, which are important parts of everyday life. Expect targeted properties transmissions have a great influence for a total noise emitted by car. This thesis deals with possibilities of reducing this noise. In a first part of this thesis, reader is acquainted with the basic knowledge of acoustics, where are definitions of sound and mentioned noise. Another part analyzes transmission, as a mechanical component formed by smaller machinery units. This description is important for understanding transmission of vibrations in the structure, which further due to vibrate surroundings, which the human ear perceives as noise. These vibrations are mainly generated between meshing gears, and therefore the transmission error, which is responsible for these vibrations is analyzed in the next section. The last part discusses noise reduction methods, partitioned by the transmission components, in which are these methods applied.
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