Print Email Facebook Twitter The Ring Screw Title The Ring Screw: Modelling, Development and Evaluation of a Novel Screw Transmission Author Heijmink, Elco (TU Delft Mechanical, Maritime and Materials Engineering) Contributor Featherstone, Roy (mentor) van de Sande, Werner (mentor) Driessen, J.J.M. (mentor) Wisse, Martijn (mentor) Degree granting institution Delft University of Technology Date 2018-08-10 Abstract Rotational electric actuators are the most popular choice for actuation in modern day automation. These actuators are commonly used in combination with a transmission system. In this paper, the development of a new rotational to linear transmission technology, called the ring screw, is described, and its real-world performance is evaluated experimentally. The ring screw consists of freely rotating rings that constrain a rod to a screwing motion. The line contact between those rings and the rod allows for perfect rolling, resulting in a highly efficient screw transmission. The theoretical performance of the ring screw for the metrics maximal velocity, maximal thrust force and mechanical efficiency are explored analytically. Based on these performance metrics, this paper presents a method to find the optimal design parameters when the desired properties are provided. A prototype was evaluated in a custom developed test rig. In these experiments the ring screw is proven to be able to operate at 15,000RPM and deliver 750N with an efficiency of 90%. The ring screw operates at more than double the speed possible with other screw transmissions such as a ball screw, with the same high efficiency. Subject Ring screwTransmissionScrewDevelopmentLinear motion To reference this document use: http://resolver.tudelft.nl/uuid:e7e28551-0410-4303-a10a-92ec88aa91a4 Embargo date 2019-04-15 Part of collection Student theses Document type master thesis Rights © 2018 Elco Heijmink Files PDF MScThesis_ElcoHeijmink_re ... sitory.pdf 18.3 MB Close viewer /islandora/object/uuid:e7e28551-0410-4303-a10a-92ec88aa91a4/datastream/OBJ/view