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Modification of the test rig for the testing the bearings for the space applications
Okál, Michal ; Křupka, Jiří (referee) ; Košťál, David (advisor)
This bachelor thesis deals with the design of a device, which allows exploration of rolling bearings properties in space conditions. The adjustment is necessary for testing of a new rolling bearing with different dimensions. Preload of the bearing must be centered and adapted for rapid heat exchange with the surroundings. The effort is made to use maximum number of existing components and torsion stiffness of the device. The thesis outputs are the accompanying report and the technical documentation allowing the production of new components.
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Identification of Leadership Competencies in a Global Organization
Kuric, Matej ; Okál, Michal (referee) ; Konečný, Štěpán (advisor)
The aim of this diploma thesis is to identify a key competencies for a leader in global corporation respecting the regional differencies. In the theoretical part we define leader, point out the differences between leader and manager and analyze the required competencies of a modern leader. In the practical part, he analyzes the leadership settings in the selected company and compares the acquired knowledge with the theoretical definitions. On the basis of the results obtained, it suggests specific ways of developing selected personality traits while accepting regional differences.
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Design of the test rig for the observations of the lubricant distribution in the rolling bearing
Okál, Michal ; Hartl, Martin (referee) ; Košťál, David (advisor)
Given diploma thesis deals with the design and realization of a device whose purpose is to simulate real condition in the contact area of deep groove ball bearings. Direct observation of such area was then carried out. Initial part of the thesis addresses principles occurring in ball bearings, such as friction and lubrication and wear mechanisms. Several devices which are commonly used for bearing lubrication studies are then described at the work. Subsequently, author’s solution was introduced with the output of Ball-on-ring device. Ball-on-ring configuration is key feature due to its geometry since it enables to create identical conditions as those which occur in ball bearings such as contact pressure and velocities. Lubricant distribution by the contact area is analysed with fluorescent microscopy. Part of this thesis is a validation experiment and drawing documentation of the device.
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Experimental observation of grease migration in a rolling bearing simulator
Palán, Miroslav ; Okál, Michal (referee) ; Košťál, David (advisor)
This thesis is using fluorescence microscopy to separately observe components of grease lubricate in simulator of ball rolling bearing. Simulator is in the configuration ball-on-disk when the disk was replaced by the outside ring made by tempered glass. This ring allows light passing to normally unseeable places of steel bearing. By the separate study of greases particles, coloured with special fluorescent dye, was found that method of fluorescence microscopy can be used to gain information about grease lubricated process in bearing.
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Modification of the rig for testing the bearings for space applications
Škubna, Michal ; Okál, Michal (referee) ; Košťál, David (advisor)
This bachelor’s thesis deals with design modification of current device, intended for function verification of rolling bearings under space conditions. Due to the larger dimensions of the newly tested bearing, the existing device cannot be used and therefore it is necessary to modify it. One of the main priorities is to use the most of existing components and maintain the torsional rigidity of the original device. The output of the work is an accompanying report and drawing documentation for production of newly designed components and drawing of full assembly of the device.
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Modelling and visualization of chain drives in Autodesk Inventor
Kučera, Dalibor ; Okál, Michal (referee) ; Košťál, David (advisor)
This thesis provides a basis for teaching the creation of a chain gear model. The creation of the model is done in the 3D modelling software Inventor from Autodesk. Although Inventor has a function to create a model of chain gear, the output of this function is not a full-fledged model of the chain gear. As part of this thesis, two educational presentations were created, which contain detailed instructions for working with the functions of the Inventor software. The first of them describes the creation of the chain gear model itself and the second provides animation instruction of the chain gear created using the previous presentation. Furthermore, as a part of the work, models were prepared on which the procedures in the presentations were shown. As a part of the thesis, a content center library for the Inventor software was also created, which contains chain links according to ČSN standards. This library is intended to facilitate the creation of a chain transfer model so that there is no need to create models of individual links.
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Elaboration of examples for teaching dynamic simulations in Inventor
Skoupil, Tomáš ; Valena, Martin (referee) ; Okál, Michal (advisor)
This bachelor's thesis focuses on creating educational materials for dynamic simulations in the Inventor software. Its aim is to demonstrate how to work effectively in the environment of dynamic simulations and introduce students to the basic principles and procedures for their utilization. The main components of the thesis are two instructional presentations that serve as teaching materials for students. These presentations focus on assembling the trigger mechanism and reloading of a Glock pistol, which are suitable for demonstrating dynamic simulations in Inventor. By studying these presentations, students will acquire new knowledge and skills in the field of dynamic simulations. They will be able to understand the individual functions of dynamic simulations and gain the necessary skills for creating various mechanisms in the virtual environment of dynamic simulations. Overall, this thesis represents a useful tool for teaching dynamic simulations in the Inventor software and provides students with a practical foundation for working with this software.
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Experimental observation of grease migration in a rolling bearing simulator
Palán, Miroslav ; Okál, Michal (referee) ; Košťál, David (advisor)
This thesis is using fluorescence microscopy to separately observe components of grease lubricate in simulator of ball rolling bearing. Simulator is in the configuration ball-on-disk when the disk was replaced by the outside ring made by tempered glass. This ring allows light passing to normally unseeable places of steel bearing. By the separate study of greases particles, coloured with special fluorescent dye, was found that method of fluorescence microscopy can be used to gain information about grease lubricated process in bearing.
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Modification of the rig for testing the bearings for space applications
Škubna, Michal ; Okál, Michal (referee) ; Košťál, David (advisor)
This bachelor’s thesis deals with design modification of current device, intended for function verification of rolling bearings under space conditions. Due to the larger dimensions of the newly tested bearing, the existing device cannot be used and therefore it is necessary to modify it. One of the main priorities is to use the most of existing components and maintain the torsional rigidity of the original device. The output of the work is an accompanying report and drawing documentation for production of newly designed components and drawing of full assembly of the device.
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Design of the test rig for the observations of the lubricant distribution in the rolling bearing
Okál, Michal ; Hartl, Martin (referee) ; Košťál, David (advisor)
Given diploma thesis deals with the design and realization of a device whose purpose is to simulate real condition in the contact area of deep groove ball bearings. Direct observation of such area was then carried out. Initial part of the thesis addresses principles occurring in ball bearings, such as friction and lubrication and wear mechanisms. Several devices which are commonly used for bearing lubrication studies are then described at the work. Subsequently, author’s solution was introduced with the output of Ball-on-ring device. Ball-on-ring configuration is key feature due to its geometry since it enables to create identical conditions as those which occur in ball bearings such as contact pressure and velocities. Lubricant distribution by the contact area is analysed with fluorescent microscopy. Part of this thesis is a validation experiment and drawing documentation of the device.
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