Effects of cleaning detergent/water-in-oil emulsions on elastohydrodynamic lubrication
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 6 September 2021
Issue publication date: 13 October 2021
Abstract
Purpose
The cleaning of food production equipment using cleaning detergents may contaminate the lubricant of the bearings, thereby reducing the bearing service life. The purpose of this paper is to investigate the cause and mechanism of such damage of bearings lubricated by cleaning detergent/water-in-oil emulsions.
Design/methodology/approach
The emulsion was prepared by adding a mixture of cleaning detergent and water in one base oil. A self-designed ball-on-disc optical interference test rig was applied to examine the effect of emulsion on lubrication and wear of bearing contacts under pure sliding conditions.
Findings
The emulsion reduced lubricating film thickness at a relatively low-sliding speed but only when the water concentration (20%) in emulsion was high. Water droplets were trapped around the ball-on-disc contact area under static conditions because of a high capillary force. The emulsion can induce damages on the soft surface in the startup mainly due to the presence of water around the contact.
Originality/value
The basic lubrication behaviour of water/oil emulsions containing cleaning detergent under pure sliding was experimental studied and the mechanism of bearing damage in food production equipment was investigated. Based on the study, the solution to avoid such damage was proposed.
Keywords
Citation
Chen, L., Xu, C., Ma, M., Wang, W., Guo, L. and Wong, P. (2021), "Effects of cleaning detergent/water-in-oil emulsions on elastohydrodynamic lubrication", Industrial Lubrication and Tribology, Vol. 73 No. 7, pp. 1045-1051. https://doi.org/10.1108/ILT-12-2020-0470
Publisher
:Emerald Publishing Limited
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