Investigation of the tribological performance of ionic liquids in non-conformal EHL contacts under electric field activation

Michal MICHALEC; Petr SVOBODA; Ivan KRUPKA; Martin HARTL; Aleksandar VENCL

doi:10.1007/s40544-019-0342-y

Friction 2020, 8(5): 982-994 https://doi.org/10.1007/s40544-019-0342-y

Research Article |

Open Access | Issue | Published: 26 February 2020

Investigation of the tribological performance of ionic liquids in non-conformal EHL contacts under electric field activation

Show Author's Information Hide Author's Information Michal MICHALEC^¹(

), Petr SVOBODA^¹, Ivan KRUPKA^{¹^,²}, Martin HARTL^¹, Aleksandar VENCL^{³^,⁴}

1 Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic

2 Central European Institute of Technology, Brno University of Technology, Brno 612 00, Czech Republic

3 Faculty of Mechanical Engineering, University of Belgrade, Belgrade 111 20, Serbia

4 South Ural State University, Chelyabinsk 454080, Russia

Keywords:

friction, lubrication, thin film lubrication, electro-rheological fluid, smart fluid

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MICHALEC M, SVOBODA P, KRUPKA I, et al. Investigation of the tribological performance of ionic liquids in non-conformal EHL contacts under electric field activation. Friction, 2020, 8(5): 982-994. https://doi.org/10.1007/s40544-019-0342-y

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Abstract

Real-time external alteration of the internal properties of lubricants is highly desirable in all mechanical systems. However, fabricating a suitable and effective smart lubricant is a long-lasting experimental process. In this study, the film thickness and frictional response of ionic liquid-lubricated non-conformal contacts to an electric field excitation under elastohydrodynamic conditions were examined. Film thickness was evaluated using a "ball-on-disc" optical tribometer with an electric circuit. Friction tests were carried on a mini traction machine (MTM) tribometer with a "ball-on-disc" rotation module and an electric circuit for contact area excitation. The results demonstrate that there is a difference in the behaviour of the ionic liquid during electric field excitation at the evaluated film thicknesses. The results of evaluated film thicknesses demonstrate that there is a difference in the behaviour of the ionic liquid during electric field excitation. Therefore, the ionic liquids could be a new basis for the smart lubrication of mechanical components. Moreover, the proposed experimental approach can be used to identify electrosensitive fluids.

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Investigation of the tribological performance of ionic liquids in non-conformal EHL contacts under electric field activation

Show Author's information Hide Author's Information Michal MICHALEC^¹(

), Petr SVOBODA^¹, Ivan KRUPKA^{¹^,²}, Martin HARTL^¹, Aleksandar VENCL^{³^,⁴}

1 Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic

2 Central European Institute of Technology, Brno University of Technology, Brno 612 00, Czech Republic

3 Faculty of Mechanical Engineering, University of Belgrade, Belgrade 111 20, Serbia

4 South Ural State University, Chelyabinsk 454080, Russia

Abstract

Keywords: friction, lubrication, thin film lubrication, electro-rheological fluid, smart fluid

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Publication history

Acknowledgements

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Publication history

Received: 21 August 2019

Revised: 30 October 2019

Accepted: 13 November 2019

Published: 26 February 2020

Issue date: October 2020

Copyright

Acknowledgements

This research was carried out under the CEITEC 2020 project (LQ1601) with financial support from the Ministry of Education, Youth and Sports of the Czech Republic under the National Sustainability Programme II and the project FSI-S-17-4415 with financial support from the Ministry of Education, Youth and Sports of the Czech Republic. Aleksandar VENCL acknowledges the projects TR 34028 and TR 35021, financially supported by the Republic of Serbia, Ministry of Education, Science and Technological Development.

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