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Modification of a multi-recess hydrostatic bearing pad geometry
Šimara, Vít ; Robenek, Dětřich (referee) ; Svoboda, Petr (advisor)
In the design of a hydrostatic bearing, basic analytical expressions assuming parallelism of sliding surfaces and simple geometry can be employed. In this study, the properties of a specific pocket shape were investigated even under conditions of tilt, which can arise from assembly errors or asymmetric loading. Based on experimental data, a Computational Fluid Dynamics (CFD) model of hydrostatic lubrication has been developed and validated. A constant flow through all recesses was considered and conditions of no movement of the sliding surface were assumed. The model was subsequently modified to a variant with discharge grooves separating individual recesses and a variant with variable recess position relative to the centre of the pocket. The results demonstrated that the pocket's ability to carry asymmetric loading increases mainly with increasing distance of the recess from the centre, followed by their size. However, this ability comes at the cost of higher performance losses in hydrostatic lubrication. The results of this work can be used for the design of pockets with different methods of pocket support or alignment.
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Design of a belt grinder for robotic grinding
Šimara, Vít ; Vetiška, Jan (referee) ; Pavlík, Jan (advisor)
This bachelor thesis focuses on stationary robotic belt grinder. The grinder is designed to be tiltable in multiple axes, to guarantee its versatility. The theoretical part describes the belt grinder’s working principle and the fundamentals of robotic grinding. In addition, current trends in this branch are described. At the beginning of the practical part, the concept of the grinder is configured, part by part. This configuration is based on the theoretical research and the choice of the best option. The mechanical design follows, supported by calculations, indispensable to ensure the right functionality of the machine. This thesis’s outlet is a 3D model of the mechanical construction of the grinder with a partial drawing and technical documentation.
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Design of a belt grinder for robotic grinding
Šimara, Vít ; Vetiška, Jan (referee) ; Pavlík, Jan (advisor)
This bachelor thesis focuses on stationary robotic belt grinder. The grinder is designed to be tiltable in multiple axes, to guarantee its versatility. The theoretical part describes the belt grinder’s working principle and the fundamentals of robotic grinding. In addition, current trends in this branch are described. At the beginning of the practical part, the concept of the grinder is configured, part by part. This configuration is based on the theoretical research and the choice of the best option. The mechanical design follows, supported by calculations, indispensable to ensure the right functionality of the machine. This thesis’s outlet is a 3D model of the mechanical construction of the grinder with a partial drawing and technical documentation.
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