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Modelling of Dynamic Properties of Gearboxes Using Virtual Prototypes
Otipka, Václav ; Trochta,, Miroslav (referee) ; Žlábek,, Pavel (referee) ; Píštěk, Václav (advisor)
Transmissions are very widespread across all categories of technical products. Their role is irreplaceable, however, their operation is always associated with the generation of significant vibration and noise, which is also considered one of the main disadvantages, which manifests itself especially in heavily loaded transmissions and represents a disadvantage mainly in terms of product competitiveness and possible legislation problems. This problem can be solved in part through sophisticated transmission optimization, which, however, requires considerable effort, time, and money. This is the main reason why there is constant pressure to find efficient solutions for optimization and why the scientific community is still paying considerable attention to this area. At present, a combination of computational and experimental approaches is used for overall optimization in this area. This dissertation is focused on the prediction and understanding of the transmission dynamic behaviour, which requires the construction of an advanced, complex computational model. Computational modelling is supported by a number of partial technical experiments, which are used to validate the results.
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Design of the connection of the friction pad and the outer ring of the clutch bearing
Kopytko, Alexandr ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
This thesis focuses on the design of the connection between the friction pad and the outer ring of the clutch release bearing. During the assembly of the friction pad, occasional damage occurs, leading to material degradation and production delays. Given the wide range of polyamides used in this application, the research includes an overview of these materials, their modifications, and methods for joining plastic with metal. The friction pad represents a further step in the improvement of the clutch mechanism; thus, the research also covers the single-plate friction clutch and its development. The connection between the friction pad and the bearing is implemented using clips that ensure a firm mechanical bond. The analysis employs the finite element method (FEM) in Ansys Workbench, utilizing 3D geometry from Creo Parametric. Based on the stress-strain analysis, design modifications of the clip connection were proposed. The outcome of the thesis includes two new models of the friction pad and their modifications, with clip dimensions approaching the manufacturability limits. The conclusion of the thesis compares the newly developed models with the commercially available design, proposing manufacturability and assembly procedures. This comprehensive approach ensures that the new design solution is not only technically feasible but also can be economically viable and practically applicable in industrial production.
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Use of modern manufacturing technologies for transmission components
Drapač, Jiří ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
The aim of this bachelor thesis is to evaluate the possibilities of application of alternative production technologies in the company Wikov MGI a. s. for the production of gearbox components. The review part of the thesis deals with additive technologies, which are Selective Laser Melting (SLM), Binder Jetting (BJ), Cold Spray (CS) and Wire Arc Additive Manufacturing (WAAM). For each method, the pre-production preparation, process with printing parameters and post-processing are described. In the next section, each technology is critically evaluated for applicability to gear components. From the results, the most appropriate application of the technology to one selected component is detected. In the practical part, optimization of dimensions and weight is performed by design modification of the selected component. On the basis of economic and technical calculations, a comparison between the current and the proposed manufacturing process is made.
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Developments of Car Drive Train
Mičola, Ivo ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
This bachelor thesis deals with research themed developements of car drive train with a view to transmissions of race vehicles. The begining of the thesis is focused on clutch systems, final drive housings, differentials and universal shafts followed by discussion of transmissions, their basic categorization and describtion of individual types. The main part of thesis deals with sequentional transmissions.
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Car gearboxes
Charvát, Adam ; Ramík, Pavel (referee) ; Kaplan, Zdeněk (advisor)
This bachelor's thesis is focused on the most common transmission types of passenger cars and their components with a focus on manual transmissions, automatic transmissions, dualclutch transmissions, continuously variable transmissions, and transmissions for electric and hybrid vehicles. The work deals with the construction, principle of operation and comparison of the properties of these devices. Thesis also contains a look at development trends of these transmissions.
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Modern Tractor Transmissions
Bartošová, Daniela ; Řehák, Kamil (referee) ; Prokop, Aleš (advisor)
This Bachelor thesis concerns an overview of the modern trends in the area of tractors transmissions. It explains the reason why both the power shifts and the continuously variable transmissions. Further on, this thesis emphasizes the innovative elements of transmission concept at selected tractor manufacturers.
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Car gearboxes
Charvát, Adam ; Ramík, Pavel (referee) ; Kaplan, Zdeněk (advisor)
This bachelor's thesis is focused on the most common transmission types of passenger cars and their components with a focus on manual transmissions, automatic transmissions, dualclutch transmissions, continuously variable transmissions, and transmissions for electric and hybrid vehicles. The work deals with the construction, principle of operation and comparison of the properties of these devices. Thesis also contains a look at development trends of these transmissions.
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Analýza technických parametrů převodových ústrojí traktorů
Kosík, Tomáš
Bachelor thesis focuses on the analysis of the technical parameters of transmissions for tractors. The introductory part of this work deals generally with transmission devices as such and their related systems. It will be pointed to the importance of selecting the correct transmission device for a given application, as well as to the importance of this device properly construct and dimension. Next there is discussed the basic structural design of transmissions and will put their advantages and disadvantages, along with an explanation of the structure and principle of operation of these systems. Furthermore, this work deals with the parameters used for calculating technical parameters transmissions. And lastly, they will be compared to the selected solutions of different transmissions from different manufacturers. At the conclusion of this work are summarized findings from previous points.
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Převodovky u moderních traktorů
ŠTĚPKA, Jakub
The thesis deals with the current state of tractor gearboxes. The first part introduces the history of tractors. Furthermore, the concept of powertrain and the distribution of tractor transmissions are explained, followed by a structure description of each of them. Beyond that, the principle of the gearbox function is described as well as its use and for better understanding most of the explanations are complemented with images. The next part deals with comparing the different power classes of tractors in terms of transmissions, speeds and specific fuel consumption. All aspects and results are summarized in conclusion.
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