Pump drill: A superb device for converting translational motion into high-speed rotation

Zhao, Z, Zhou, S, Feng, X and Xie, Y 2017, 'Pump drill: A superb device for converting translational motion into high-speed rotation', Extreme Mechanics Letters, vol. 16, pp. 56-63.


Document type: Journal Article
Collection: Journal Articles

Title Pump drill: A superb device for converting translational motion into high-speed rotation
Author(s) Zhao, Z
Zhou, S
Feng, X
Xie, Y
Year 2017
Journal name Extreme Mechanics Letters
Volume number 16
Start page 56
End page 63
Total pages 8
Publisher Elsevier BV
Abstract Pump drill is an easily constructed ancient device that has been used for centuries to start fires and bore holes. It can effectively transfer rhythmic translational motions into vibratory, bi-directional rotary insertions. Here we explore, both experimentally and theoretically, the kinematics, dynamics, and potential applications of pump drills. The theoretical model, validated by experimental measurements, enables us to obtain the optimal structural geometries (e.g., the thread length and the crossbar span) of pump drills that maximize the mechanical responses such as the winding angle of the threads. Furthermore, the dependence of its rotational speed and piercing force on the loading conditions is investigated. Finally, manually powered devices, including an electric generator and a centrifugal separator, are developed based on the pump drill. This study paves a way towards promising applications of the pump drill in, for instance, energy harvesting and centrifugation.
Subject Structural Engineering
Keyword(s) Bi-directional rotary insertion
Biomedical needle
Centrifugation
Energy harvesting
Pump drill
DOI - identifier 10.1016/j.eml.2017.09.001
Copyright notice © 2017 Elsevier Ltd. All rights reserved.
ISSN 2352-4316
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