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Chain Drive Computional Model as Virtual Engine Module
Vlastník, Jan ; Štětina, Josef (referee) ; Dundálek, Radim (referee) ; Píštěk, Václav (advisor)
his work deals with the methods of creating computational models for the analysis of the chain drive of camshafts in combustion engines. Methods are compared of the simulation of the drive mechanism; a new method is also presented for the simulation of the tensioning and guide bar by means of a modal reduction of an elastic body in the Multibody system. The work describes individual parts of the chain gear and the mathematical formulation of differential equations of motion. Algorithms are also indicated describing the mutual interaction of bodies in contact. Computations are here described for the determination of individual parameters necessary for setting up a chain drive model. The tensile characteristics of the chain is determined by the FEM programme. The chain model is analyzed in several alternatives of arrangement. FEM calculations are described here of the rigidity of contacts between the chain and the chain wheels and between the chain and the guide bars. The computational model has been created in the MSC ADAMS programme. The computation is carried out for a stabilized speed of the crankshaft of 3,000, 4,500 and 6,000 rpm and for a continuous start from the idle state up to the speed of 6,000 rpm with a constant load of the crankshafts by the torsion moment. Computation is also carried out for loading the crankshafts with a torsion moment deduced from the cam shape. The courses of the quantity obtained are processed by means of FFT; Campbell diagrams have been constructed for their evaluation. The results have been compared with the modal analyses of the individual parts of the chain gear for the determination of their mutual interaction.
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Transfer table electromechanical
Přecechtílek, Pavel ; Malach, František (referee) ; Malášek, Jiří (advisor)
The aim of this thesis is to design a proposal of Transfer table electromechanical earmarked for transporting packs of sheets of tin with balance-sheet of electromechanical and electrohydraulic construction and to make important technical calculations. The introduction contains a description of the used constructional solution with the description of the individual parts of the transfer table and survey used components from different producer. The work includes functional calculations, which mainly includes the design and control of power running and lifting gear, calculate speeds and lift loads, the chain drives and other assemblies Transverse. Conclusion of this work deals with the assessment of the frame strength of the Transfer table using the finite element method. Further the work deals with the assessment of the maximum capacity of the machine and with any design modifications. The work also contains a design documentation, especially the plan of the Transfer table and detailed drawings of the frame and eccentric casters.
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The changeable strut devices for cranes in hall
Dvořáček, Jan ; Pokorný, Jan (referee) ; Kašpárek, Jaroslav (advisor)
This thesis was created for Bosch Rexroth in order to simplify the lifting work in the manufacturing hall. There was made the construction project of changeable strut devices for lifting loads. The project is comprised of two parts. The first deals with the analytical calculation and the second part consists of a numerical calculation using the finite element method.
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Design of conveyor of couplers
Klár, Pavel ; Ripel, Tomáš (referee) ; Krejsa, Jiří (advisor)
This thesis is focused on the design of conveyor of couplers with regard to the requirements for the resolution, and consisting of several parts. The first part outlines the given issue, short research study and an idea of solution. The next part concentrates on the structural design of the whole conveyor. Then the description of the first part of the conveyor including the structural design and the required calculations follow. Finally, other conveyor parts, the budget and the instruction manual are explained. The thesis includes the related drawings and all necessary calculations for other conveyors parts as well.
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Tackles
Stanec, Stanislav ; Pokorný, Přemysl (referee) ; Malášek, Jiří (advisor)
The first part of the bachelor‘s thesis contains background research of constructions and the basic calculations of the tackles. In the second part there is worked out a design and calculation the tackle of Archimedes on the basis of the suitably chosen parameters. Drawing documentation is attached to this thesis.
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Design of Electric Hoist, Capacity 250 kg
Soška, Michal ; Malášek, Jiří (referee) ; Škopán, Miroslav (advisor)
Bachelor's thesis deals with design of overhead electric driven hoist with hand-driven trolley. The objective was to design original and effective solution. Lifting mechanism is implemented as a chain drive, with own designed chain guide. Work contains a description of the individual components, corresponding calculations and drawings.
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Analysis of chain gears production.
Březina, Stanislav ; Zemčík, Oskar (referee) ; Zemčík, Oskar (advisor)
Analysis of chain gears production including comparison and evaluation. Description of particular kinds of chain gears and wheels. Descripton of particular technologies and methods of production of chain gears and comparison of suitability of usage of particular methods, instruments and parameters.
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