|
|
Realization of educational problem based on torsional vibration apparatus
Bartošek, Daniel ; Hartl, Martin (referee) ; Vaverka, Michal (advisor)
The presented master´s thesis deals with realization educational tasks on torsional vibration apparatus. It was designed and tested six educational experiments, to extend student´s knowledge of the static and dynamic properties of rotary systems. On the experimental apparatus it is possible to use inertial discs, adjustable semi-rotary damper with forced vibration crank drive unit. New set of shafts extends the variability of experimental apparatus. Students can realize the measurement of dynamic characteristics and torsional vibration using oscilloscope. New frame for the apparatus which meet all operation requirements was also designed. The solved problematics and all educational tasks are described in new prepared materials for teaching.
|
|
| |
|
|
Experimental study of lubricant films in contact of machine parts
Kučera, Ondřej ; Křupka, Ivan (referee) ; Vaverka, Michal (advisor)
This bachelor thesis is focused on the description of methods for experimantal study of lubrication films in contact of machine parts, particularly for non-conformal surfaces, for which elastohydrodynamic and mixed of lubrication is typical. The methods are devided according to measured quantity into the methods for film thickness measurement, contact pressure measurement and temperature measurement. It was described the principle of these methods, the equipment, application and characteristics. Finally, evaluation of current status and further development are included.
|
|
|
Design of vending machine for energy bars
Černošek, Martin ; Koutný, Daniel (referee) ; Vaverka, Michal (advisor)
This bachelor thesis is focused on the construction of vending machine for energy bars. Vending machine can sell two types of bars. It is constructed according to the client requirements. It is assumed that construction of vending machine will make the sell more effective. Thesis contains the description of main parts of vending machines, and also variants of design solutions and the final construction itself. The conclusion includes construction, technological, and economical review.
|
|
|
High-bay warehouse for lacquered bodywork
Bachorík, Patrik ; Vaverka, Michal (referee) ; Vašek, Lubomír (advisor)
The aim of this diploma work was a design of a high-bay warehouse for lacquered car bodywork with focus on the issue of a conveyer line and its incorporation into the existing material flow in company Skoda Auto a.s.. Three variants of the warehouse for the lacquered car bodywork were proposed and described. For each one of them, a time analysis of car bodywork removal from the storage was carried out. The thesis was ended with a complex evaluation of the three variants according to chosen criteria, based on which the best variant was selected. That one was further depicted in layout documentation.
|
|
|
Elastohydrodynamic lubrication of elliptical contacts
Hodás, Ladislav ; Vaverka, Michal (referee) ; Hartl, Martin (advisor)
Principal intention of this thesis is comparation of given equations for minimal and central thickness of elastohydrodynamical lubricant film at elliptical contact between smooth rubbing faces in regular isothermal conditions. Thereinafter, possible approaches to assessment of thickness of lubricant film and verification of their validity via experiment are trashed out.
|
|
|
Study of behaviour of EHD lubricated contact of machine parts within non-smooth surfaces
Zapletal, Lukáš ; Maňas, Pavel (referee) ; Vaverka, Michal (advisor)
Master’s thesis deals with development of software application to calculate contact pressure in eleastohydrodynamic lubricated contact in order to use previously obtained data of the lubricating film thickness. The introduction contains a short overview of methods used for the study of film thickness and contact pressure. Custom work includes a contact pressure solution derived from a film thickness, a description of the developed software and analysis of algorithms used for its compilation. The last part deals with the verification of algorithm, application of software for calculating the contact pressure on the rough surface and analysis of the results. The conclusion includes a summary and possible application of software in practice.
|
|
|
Calculation of contact pressure from experimentally evaluated lubricant film thickness
Kozel, Lubomír ; Hartl, Martin (referee) ; Vaverka, Michal (advisor)
This diploma thesis is engaged in calculation of contact pressure from thickness of lubricating film using Finite Element Method (FEM). Within my diploma thesis were performed the calculations concerning to non-conformal surfaces with a view to elastohydrodynamic lubrication. The simulations were done for disk and ball contact, respectively with burnished finish and also with surface which contains small dent. Flow diagram was designed so that the creation of geometry, boundary conditions and results saving is controlled parametrically. With using parameters it is possible to repeat the calculation when the resolution, geometry, etc. will be changed.
|
|
|
Lubrication of gasoline and diesel engines
Krejčí, Tomáš ; Vaverka, Michal (referee) ; Křupka, Ivan (advisor)
The main subject of this bachelor’s thesis is describing the present state of knowledge in the sphere of compression-ignition and spark-ignition engines lubrication, lubricants and future trends. First part is about internal combustion principle, engine construction. Next parts are about engine lubrication system, lubricating modes, and its locating in the engine. Last part is about oils, and insights into the future.
|
|
|
High-bay warehouse for lacquered bodywork
Bachorík, Patrik ; Vaverka, Michal (referee) ; Vašek, Lubomír (advisor)
The aim of this diploma work was a design of a high-bay warehouse for lacquered car bodywork with focus on the issue of a conveyer line and its incorporation into the existing material flow in company Skoda Auto a.s.. Three variants of the warehouse for the lacquered car bodywork were proposed and described. For each one of them, a time analysis of car bodywork removal from the storage was carried out. The thesis was ended with a complex evaluation of the three variants according to chosen criteria, based on which the best variant was selected. That one was further depicted in layout documentation.
|
guest ::
