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Development of an Oil Free Water-Based Lubricant for Gear Applications

1
Gear Research Centre (FZG), Technical University of Munich, 85748 Garching, Germany
2
Carl Bechem GmbH, 58089 Hagen, Germany
*
Author to whom correspondence should be addressed.
Lubricants 2019, 7(4), 33; https://doi.org/10.3390/lubricants7040033
Received: 8 February 2019 / Revised: 22 March 2019 / Accepted: 2 April 2019 / Published: 10 April 2019
(This article belongs to the Special Issue Gear Tribology)
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Abstract

The aim of the current research is to develop a gear transmission fluid based on water and plant extract. Up to now, mineral or synthetic oils are used as lubricants in most gear drive applications. These oils are made of fossil raw materials and are non-biodegradable. Lately, there have been some efforts made to develop lubricants as an alternative to conventional lubrication systems such as triglycerides from native oils or synthetic esters. These lubricants are more biodegradable than mineral oils but also show some difficulties during performance like saponification. Within a former research project, the company Carl Bechem GmbH and the Fraunhofer Institute for Process Engineering and Packaging IVV developed a cutting fluid based on water and plant extract. With a model sample of this fluid, which also contained gear typical additives, preliminary experimental investigations for a current research study were conducted. The results confirmed the general suitability of this water-based lubricant for gear drives under certain operating conditions. Using water as lubricants can lead to some improved characteristics due to the very high thermal conductivity and the reduced friction. This paper aims to point out the benefits of using water-based lubricants, share the results of some preliminary experimental investigations on a fluid sample based on water and plant extract, and discuss the challenges, which one has to overcome during the development of such new lubricants. View Full-Text
Keywords: water-based lubricant; plant extract; gear transmission fluid; biodegradable lubricant; fire protection; reduced friction; high thermal conductivity water-based lubricant; plant extract; gear transmission fluid; biodegradable lubricant; fire protection; reduced friction; high thermal conductivity
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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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Sagraloff, N.; Dobler, A.; Tobie, T.; Stahl, K.; Ostrowski, J. Development of an Oil Free Water-Based Lubricant for Gear Applications. Lubricants 2019, 7, 33.

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