Design and development of a ball impact apparatus for the direct measurement of lubricant friction under high pressures and shear rates

Author:

Workel M. F.1,Dowson D1,Ehret P1,Taylor C. M.1

Affiliation:

1. The University of Leeds Institute of Tribology, School of Mechanical Engineering UK

Abstract

The development of a new ball impact apparatus for the measurement of the traction behaviour of solidified lubricants is described. The normal and tangential forces between an oily plate and an obliquely impacting ball were measured directly on two different forms of apparatus by means of piezoelectric transducers. From the measured forces the coefficient of friction during impact could be calculated. For one particular oil, Santotrac 50, a full set of results is given and these are shown to be in good agreement with values reported previously by others using different forms of experimental equipment.

Publisher

SAGE Publications

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering

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1. Duncan Dowson and elastohydrodynamic lubrication at Leeds University;Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology;2021-10-26

2. Bouncing ball lubrication;Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology;2021-10-22

3. Duncan Dowson’s impact on industrial tribology;Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology;2021-06-18

4. The Mechanochemistry of Synthetic Phosphate Oil under High Pressure;Key Engineering Materials;2010-11

5. An approach for determination of lubricant properties at elliptical elastohydrodynamic contacts using a twin-disc test device and a numerical traction model;Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology;2008-07-01

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