Superlubricity in EHL contacts with water-containing gear fluids

Mustafa Yilmaz; Michael Mirza; Thomas Lohner; Karsten Stahl

doi:10.3390/lubricants7050046

Superlubricity in EHL contacts with water-containing gear fluids

Mustafa Yilmaz, Michael Mirza, Thomas Lohner, Karsten Stahl

Chair of Machine Elements

Technical University of Munich

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

Fluid friction in elastohydrodynamically lubricated (EHL) contacts depends strongly on the lubricant considered. Synthetic oils can have significantly lower fluid friction than mineral oils. Water-containing fluids have the potential to significantly reduce fluid friction further. The aim of this study is to investigate the film formation and frictional behavior of highly-loaded EHL contacts with water-containing fluids. Comparisons are made with mineral and polyalphaolefin oils. Measurements at an optical EHL tribometer show good lubricant film formation of the considered water-containing gear fluids. Measurements at a twin-disk test rig show coefficients of friction smaller than 0.01, which is referred to as superlubricity, for all considered operating conditions.

Original language	English
Article number	46
Journal	Lubricants
Volume	7
Issue number	5
DOIs	https://doi.org/10.3390/lubricants7050046
State	Published - 1 May 2019

Keywords

EHL
Friction
Gear
Superlubricity
Water-containing fluids

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10.3390/lubricants7050046

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abstract = "Fluid friction in elastohydrodynamically lubricated (EHL) contacts depends strongly on the lubricant considered. Synthetic oils can have significantly lower fluid friction than mineral oils. Water-containing fluids have the potential to significantly reduce fluid friction further. The aim of this study is to investigate the film formation and frictional behavior of highly-loaded EHL contacts with water-containing fluids. Comparisons are made with mineral and polyalphaolefin oils. Measurements at an optical EHL tribometer show good lubricant film formation of the considered water-containing gear fluids. Measurements at a twin-disk test rig show coefficients of friction smaller than 0.01, which is referred to as superlubricity, for all considered operating conditions.",

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AU - Yilmaz, Mustafa

AU - Mirza, Michael

AU - Lohner, Thomas

AU - Stahl, Karsten

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Y1 - 2019/5/1

N2 - Fluid friction in elastohydrodynamically lubricated (EHL) contacts depends strongly on the lubricant considered. Synthetic oils can have significantly lower fluid friction than mineral oils. Water-containing fluids have the potential to significantly reduce fluid friction further. The aim of this study is to investigate the film formation and frictional behavior of highly-loaded EHL contacts with water-containing fluids. Comparisons are made with mineral and polyalphaolefin oils. Measurements at an optical EHL tribometer show good lubricant film formation of the considered water-containing gear fluids. Measurements at a twin-disk test rig show coefficients of friction smaller than 0.01, which is referred to as superlubricity, for all considered operating conditions.

AB - Fluid friction in elastohydrodynamically lubricated (EHL) contacts depends strongly on the lubricant considered. Synthetic oils can have significantly lower fluid friction than mineral oils. Water-containing fluids have the potential to significantly reduce fluid friction further. The aim of this study is to investigate the film formation and frictional behavior of highly-loaded EHL contacts with water-containing fluids. Comparisons are made with mineral and polyalphaolefin oils. Measurements at an optical EHL tribometer show good lubricant film formation of the considered water-containing gear fluids. Measurements at a twin-disk test rig show coefficients of friction smaller than 0.01, which is referred to as superlubricity, for all considered operating conditions.

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KW - Gear

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KW - Water-containing fluids

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Superlubricity in EHL contacts with water-containing gear fluids

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