Mechano-Erosion: a Novel Test Methodology to Accelerate Erosion in Rolling Contact Fatigue Experiments
Abstract
Rolling contact fatigue testing of rolling elements with low saturation temperature lubricants result, in several difficulties. Mainly, uncontrolled phase changes due to flow dynamics often cause difficulties in assessing the lubricant effect on fatigue life. This work simulates these conditions for testing in a controlled environment to understand the mechanism of material wear. A rotary tribometer was modified to allow an ultrasonic transducer. This modification made it possible to bring the two different phenomena Rolling contact fatigue and Erosion together. With this novel testing method, erosion was created on the contact track within a short period of time. Moreover, Erosion characteristics and its effects on rolling contact fatigue testing were monitored and these preliminary results are presented in this paper.
References
[2]. Bhusan, B., 2002, Introduction to tribology, Columbus: John Willey & Sons Inc.
[3]. Bhusan B and Sibley L.B., 1981, Silicon nitride rolling bearings for extreme operating conditions, ASLE Transactions, Vol.25(4), p. 417-428.
[4]. Cinatar, C., 2001, Sustainable development of mechanical systems using replacement environmentally acceptable refrigerants, PhD thesis, Bournemouth University, UK.
[5]. Hadfield M., 1998, Failure of silicon nitride rolling elements with ring crack defects. Ceram Int, Vol 24 (5), pp. 379-386.
[6]. Hadfield M, Stolarski TA, et al., 1993, Failure modes of ceramics in rolling contact, Proceedings: Mathematical and Physical Sciences, R Soc, Lond, Vol 443 (1919), pp. 607-621.
[7]. Hadfield M, Stolarski TA, et al., 1993, Failure modes of ceramic elements with ring-crack defects. Tribol Int, Vol 26:157–64.
[8]. Hamburg G, C.P.a.V.R., 1981, Operation of an all-ceramic mainshaft roller bearing in J-402 gas turbine engine. J ASME, Lubrication Engineering, Vol 37(7), pp. 407-415.
[9]. Hans H Wallin, G.M.E., 2002., Hybrid bearings in oil-free air conditioning and refrigeration compressors, in SKF Evolution magazine, pp. 28-30.
[10]. Khan, Z.A., 2006, Rolling contact wear of hybrid ceramic bearings with refrigerant lubrication, PhD thesis, Bournemouth University, UK.
[11]. SKF, USA., 2003, New Hybrid bearings enable maximum pump performance with minimum lubrication, in Worldpumps, issue 441, pp. 37-39.
[12]. Scott D, Blackwell J., 1973, Hot pressed silicon nitride as a rolling bearing material – a preliminary assessment. Wear, Vol 24 (1), pp.61-67.
[13]. Scott D, Blackwell J, et al., 1971, Silicon nitride as a rolling bearing material – a preliminary assessment, Wear, Vol 17(1) 73–82.
[14]. Standard method of vibratory cavitation erosion test. ASTM G32–85, p. 116-121.
