Friction Torque Measurement in Partial Hybrid S-C Angular Contact Ball Bearings

Abstract:

To monitor the friction torque evolution in tandems of angular contact ball bearings, a new testing device is developed. New partial hybrid bearings from 7206C series are obtained by combining 8 steel balls with 4 silicon nitride balls of the same diameter equally spaced in the cage, these bearings being denoted hereafter as 8S-4C type. For comparison, tests are carried-out also on conventional all-steel bearings and hybrid bearings with all the steel balls replaced by silicon nitride balls. The equilibrium temperature of the all-steel, hybrid and 8S-4C ball bearings is determined by tests. At high speed and light axial load, the 8S-4C ball bearings withstand to an oil shut-off test of one minute, while the similar all-steel bearings seized. The 8S-4C partial hybrid ball bearings can be an advantageous solution comparative to more expensive all hybrid bearings, avoiding the scuffing due to the self-healing effect induced by the higher hardness of the silicon nitride balls.

• Periodical: Applied Mechanics and Materials (Volume 658)
• Pages: 339-344
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.658.339
• Online since: October 2014
• Authors: Viorel Paleu*, Ioan Damian, Cristel Stirbu
• Keywords: Friction Moment, Hybrid Ball Bearings, Oil Mist Lubrication, Silicon Nitride, Test Rig

References

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