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Machines 2014, 2(4), 312-324;

Contactless Mechanical Components: Gears, Torque Limiters and Bearings

Departamento de Teoría de la Señal y Comunicaciones, Universidad de Alcalá, 28871, Alcalá de Henares, Spain
Departamento de Ingeniería Mecánica, Universidad Carlos III de Madrid, 28911, Leganés, Spain
MAG SOAR SL, 28341, Valdemoro, Spain
Instituto Pedro Juan de Lastanosa, Universidad Carlos III de Madrid, 28911, Leganés, Spain
All the authors contributed equally to this work.
Author to whom correspondence should be addressed.
Received: 2 October 2014 / Revised: 20 November 2014 / Accepted: 8 December 2014 / Published: 18 December 2014
(This article belongs to the Special Issue Feature Papers)
Full-Text   |   PDF [521 KB, uploaded 23 December 2014]   |  


Contactless mechanical components are mechanical sets for conversion of torque/speed, whose gears and moving parts do not touch each other, but rather they provide movement with magnets and magnetic materials that exert force from a certain distance. Magneto-mechanical transmission devices have several advantages over conventional mechanisms: no friction between rotatory elements (no power losses or heat generation by friction so increase of efficiency), no lubrication is needed (oil-free mechanisms and no lubrication auxiliary systems), reduced maintenance (no lubricant so no need of oil replacements), wider operational temperature ranges (no lubricant evaporation or freezing), overload protection (if overload occurs magnet simply slides but no teeth brake), through-wall connection (decoupling of thermal and electrical paths and environmental isolation), larger operative speeds (more efficient operative conditions), ultralow noise and vibrations (no contact no noise generation). All these advantages permit us to foresee in the long term several common industrial applications in which including contactless technology would mean a significant breakthrough for their performance. In this work, we present three configurations of contactless mechanical passive components: magnetic gears, magnetic torque limiters and superconducting magnetic bearings. We summarize the main characteristic and range of applications for each type; we show experimental results of the most recent developments showing their performance. View Full-Text
Keywords: contactless mechanical component magnetic gear; magnetic torque limiter; superconducting magnetic bearing contactless mechanical component magnetic gear; magnetic torque limiter; superconducting magnetic bearing

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Perez-Diaz, J.L.; Diez-Jimenez, E.; Valiente-Blanco, I.; Cristache, C.; Alvarez-Valenzuela, M.-A.; Sanchez-Garcia-Casarrubios, J. Contactless Mechanical Components: Gears, Torque Limiters and Bearings. Machines 2014, 2, 312-324.

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