Analysis of surface topography of slide journal bearings and micro - bearings

• Autorzy: Miszczak A.
• Języki publikacji: EN

Abstrakty

EN

In this paper, the author presents the results of measurements of the slide journal bearings and micro-bearings sleeves and journal surfaces. The study was performed with the atomic force microscope (AFM) NT-206. The results of measurements of surface topography are presented in the form of a 2D and 3D map of surface topography and also in the form of profiles for selected cross-sections of examined surfaces. Additionally, the height distributions of surface roughness are presented. The Atomic Force Micsroscope NT-206 allows investigating the surface of sample with maximum scanning area 32μm x 32μm and with the maximum value of roughness ±1μm. The measurements can be carried out in three modes: static (contact) mode, dynamic (non-contact) mode, dynamic intermittent mode. The author used the contact mode. The application of this mode of operation, in the case of samples with a hard surface, for example, the journal of a bearing, enables to obtain a good mapping of the measured surface. The presented in this paper results of surface topography measurements, include the calculated values of the Ra and Rq parameters and also the maximum value of the distance between the lowest and the highest surface inequality. The obtained results allow evaluating the amount and type of wear of researched elements in the micro-scale and they also are useful in the design of such surface layers of co-operating components, in order to obtain optimum tribological properties. When considering the impact of the surface roughness on the change of height of bearing gap, and consequently the change of flow and operating parameters, the information about average distribution of roughness value is required. With such measurements, it is possible to obtain these data. In the presented research the micro-bearings from personal computers hard drives, as well as classic bearings and sleeves, were investigated.

Słowa kluczowe

EN

surface topography; atomic force microscope; static contact mode; height distributions of surface roughness

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2013
• Tom: Vol. 20, No. 4
• Strony: 285--292
• Opis fizyczny: Bibliogr. 4 poz., rys.

Twórcy

autor

Miszczak A.

• Gdynia Maritime University Faculty of Marine Engineering Morska Street 83, 81-225 Gdynia, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Andharia, P. I., Deheri, G. M., Gupta, J. L., Effect of Longitudinal surface Roughness on the Behaviour of Squeeze Film in a Spherical Bearing, International Journal of Applied Mechanics and Engineering, Vol. 6, No. 4, pp. 885-897, 2001.
• [2] Chizhik, S., Khudoley, A., Kuznetsova, T., Wierzcholski, K., Miszczak, A., Micro and Nanoscale Wear Studies of HDD Slide Bearings By Atomic Force Microscopy, Proceedings of Methodological Aspects of Scanning Probe Microscopy, Heat and Mass Transfer Institute of NAS, pp. 247-252, Minsk 2010.
• [3] Gururajan, K., Prakash, J., Surface Roughness Effects in Infinitely Long Porous Journal Bearings, Transactions of the ASME, Journal of Tribology, Vol. 121, pp. 139-147, 1999.
• [4] Wierzcholski, K., Miszczak, A., Stochastic Model for Turbulent Lubrication of Slide Journal Bearing in Ship Technology, Polish Academy of Sciences, Branch in Gdańsk, Marine Technology Transactions, Vol. 15, pp. 455-466, 2004.