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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Design of a ball screw for space applications
 Volf, Tadeáš ; Pouzar, Josef (referee) ; Košťál, David (advisor)
This work deals with the construction of a ball screw acting as part of the table feed mechanism within a vacuum tribometer of the "pin on plate" type. The working environment inside the tribometer simulates real conditions of the space environment such as vacuum and high temperature differences. Therefore, the construction of the ball screw must primarily respect the parameters of the operating environment and further dimensional compatibility with the tribometer assembly. The resulting construction of this mechanism will be based on critical research of existing solutions and procedures, conceptual designs of specific solutions, as well as calculations and selection of standardized construction parameters and parameters affecting the impacts of the operating environment. Based on these calculations, resulting contact pressures and deformations between rolling elements and their tracks caused by thermal expansion were determined. These calculations are primarily based on Hertz's theory of contact pressures. Subsequently, their verification against their permissible values was carried out. The output of this work is a satisfactory design solution of the ball screw and corresponding drawing documentation.
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