Publication: Development of twin disc test rig for measurement of friction force in elastohydrodynamic lubrication
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Date
2023-07-13
Authors
Gautham a/l Sathu Raman
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Abstract
A number of failures in power transmission can be attributed to the pitting in gear tooth flanks. This becomes a huge problem because pitting in gears cause increase in friction and a lot of heat to be generated. As a result, ISO standard 6336 recommends performing testing on rolling pair of discs to assess the pitting durability of different materials or production techniques. In this paper, a twin disc gear rig is setup to analyse the friction force and surface wear between two contacting surfaces. The twin disc gear rig is made up of two parallel, coaxial discs that simulate gear engagement. Each disc precisely replicates gear tooth profiles, allowing for exact control of contact conditions. The rig provides for a complete evaluation of frictional properties and surface wear patterns by subjecting the gear discs to regulated weights, rotating speeds, and lubrication conditions. Using integrated load cells, the friction force acting at the gear contact interfaces may be precisely measured. Furthermore, the rig provides optical or profilometric methods for real-time surface wear monitoring. This function offers insightful information about the wear processes, contact wear, and material deterioration at gear interfaces. Researchers can construct models and predictive tools to improve gear design, lubrication tactics, and maintenance procedures by linking friction force measurements with surface wear data.