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The effect of texture geometry on friction and lubricating film formation in radial journal bearing
Katrincová, Tereza ; Čermák, Jan (referee) ; Šperka, Petr (advisor)
The aim of this diploma thesis is to find out how the geometric parameters of circular textures affect the friction and lubrication in a conformal contact. The configuration of a partial, radial, hydrodynamic bearing was investigated on a modified block on-ring device, where the block was replaced by a sapphire section. The device allows simultaneous measurement of friction and optical observation of processes in contact. The light induced fluorescence method was used for the measurement of film thickness. None of the studied texture combinations had a positive effect on the transition from hydrodynamic mode to mixed lubrication mode. Textures in the narrow band of the combination of diameter and depth have a positive effect, outside of them negative effect of texture on friction and film thickness was observed.
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A proposal of production of jigsaw puzzle of gears using 3D printing technology
Katrincová, Tereza ; Sliwková, Petra (referee) ; Sedlák, Josef (advisor)
The bachelor thesis deals with the design and production of jigsaw puzzle of gears using 3D printing technology. The theory section is dedicated to characteristics of gearing with emphasis on involute gearing, the additive Rapid Prototyping technology and materials for 3D printing. The practical part describes the design and productions of the jigsaw puzzle that was made on a school 3D printer using method called Fused Deposition Modeling. Conclusion of this thesis contains technical-economic evaluation which compares the production possibilities of gears.
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The effect of texture geometry on friction and lubricating film formation in radial journal bearing
Katrincová, Tereza ; Čermák, Jan (referee) ; Šperka, Petr (advisor)
The aim of this diploma thesis is to find out how the geometric parameters of circular textures affect the friction and lubrication in a conformal contact. The configuration of a partial, radial, hydrodynamic bearing was investigated on a modified block on-ring device, where the block was replaced by a sapphire section. The device allows simultaneous measurement of friction and optical observation of processes in contact. The light induced fluorescence method was used for the measurement of film thickness. None of the studied texture combinations had a positive effect on the transition from hydrodynamic mode to mixed lubrication mode. Textures in the narrow band of the combination of diameter and depth have a positive effect, outside of them negative effect of texture on friction and film thickness was observed.
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A proposal of production of jigsaw puzzle of gears using 3D printing technology
Katrincová, Tereza ; Sliwková, Petra (referee) ; Sedlák, Josef (advisor)
The bachelor thesis deals with the design and production of jigsaw puzzle of gears using 3D printing technology. The theory section is dedicated to characteristics of gearing with emphasis on involute gearing, the additive Rapid Prototyping technology and materials for 3D printing. The practical part describes the design and productions of the jigsaw puzzle that was made on a school 3D printer using method called Fused Deposition Modeling. Conclusion of this thesis contains technical-economic evaluation which compares the production possibilities of gears.
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