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A Microfluidic Rotational Motor Driven by Circular Vibrations

Constructing micro-sized machines always involves the problem of how to bring the energy (electric, magnetic, light, electro wetting, vibrational, etc.) source to the device to produce mechanical movements. The paper presents a rotational micro-sized motor (the diameter of the rotor is 350 µm) drive...

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Detalles Bibliográficos
Autores principales: Uran, Suzana, Bratina, Božidar, Šafarič, Riko
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6953025/
https://www.ncbi.nlm.nih.gov/pubmed/31771192
http://dx.doi.org/10.3390/mi10120809
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author Uran, Suzana
Bratina, Božidar
Šafarič, Riko
author_facet Uran, Suzana
Bratina, Božidar
Šafarič, Riko
author_sort Uran, Suzana
collection PubMed
description Constructing micro-sized machines always involves the problem of how to bring the energy (electric, magnetic, light, electro wetting, vibrational, etc.) source to the device to produce mechanical movements. The paper presents a rotational micro-sized motor (the diameter of the rotor is 350 µm) driven by low frequency (200–700 Hz) circular vibrations, made by two piezoelectric actuators, through the medium of a water droplet with diameter of 1 mm (volume 3.6 µL). The theoretical model presents how to produce the circular streaming (rotation) of the liquid around an infinitely long pillar with micro-sized diameter. The practical application has been focused to make a time-stable circular stream of the medium around the finite long vibrated pillar with diameter of 80 µm in the presence of disturbances produced by the vibrated plate where the pillar is placed. Only the time-stable circular stream in the water droplet around the pillar produces enough energy to rotate the micro-sized rotor. The rotational speed of the rotor is controlled in both directions from −20 rad/s to +26 rad/s. 3D printed mechanical amplifiers of vibrations, driven by piezoelectric actuators, amplify the amplitude of the piezoelectric actuator up to 20 µm in the frequency region of 200 to 700 Hz.
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spelling pubmed-69530252020-01-23 A Microfluidic Rotational Motor Driven by Circular Vibrations Uran, Suzana Bratina, Božidar Šafarič, Riko Micromachines (Basel) Article Constructing micro-sized machines always involves the problem of how to bring the energy (electric, magnetic, light, electro wetting, vibrational, etc.) source to the device to produce mechanical movements. The paper presents a rotational micro-sized motor (the diameter of the rotor is 350 µm) driven by low frequency (200–700 Hz) circular vibrations, made by two piezoelectric actuators, through the medium of a water droplet with diameter of 1 mm (volume 3.6 µL). The theoretical model presents how to produce the circular streaming (rotation) of the liquid around an infinitely long pillar with micro-sized diameter. The practical application has been focused to make a time-stable circular stream of the medium around the finite long vibrated pillar with diameter of 80 µm in the presence of disturbances produced by the vibrated plate where the pillar is placed. Only the time-stable circular stream in the water droplet around the pillar produces enough energy to rotate the micro-sized rotor. The rotational speed of the rotor is controlled in both directions from −20 rad/s to +26 rad/s. 3D printed mechanical amplifiers of vibrations, driven by piezoelectric actuators, amplify the amplitude of the piezoelectric actuator up to 20 µm in the frequency region of 200 to 700 Hz. MDPI 2019-11-23 /pmc/articles/PMC6953025/ /pubmed/31771192 http://dx.doi.org/10.3390/mi10120809 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Uran, Suzana
Bratina, Božidar
Šafarič, Riko
A Microfluidic Rotational Motor Driven by Circular Vibrations
title A Microfluidic Rotational Motor Driven by Circular Vibrations
title_full A Microfluidic Rotational Motor Driven by Circular Vibrations
title_fullStr A Microfluidic Rotational Motor Driven by Circular Vibrations
title_full_unstemmed A Microfluidic Rotational Motor Driven by Circular Vibrations
title_short A Microfluidic Rotational Motor Driven by Circular Vibrations
title_sort microfluidic rotational motor driven by circular vibrations
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6953025/
https://www.ncbi.nlm.nih.gov/pubmed/31771192
http://dx.doi.org/10.3390/mi10120809
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