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The development of the lubricants applied in the porous bearings

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In the article the development process of lubricants applied to the porous sliding bearings is described and characterised. Porous bearings are widely used in mechanical vehicles, household appliances and manufacturing equipment. However their application to tribological pairs is believed to be limited because of their properties and features such as small resistance to edge and dynamic loads, ability to work only at small sliding velocity. For the last twenty years intensive research under the development of the porous bearings has been observed and newly designed porous bearings have occurred. In that process also lubricants were developed. As the result the range of used lubricants is wider and also their chemical constitution was changed from the mineral oils to the synthetic bases giving better resistance on aging process and better rheological characteristics. Each group of lubricants was characterised and the problems of lubricant selection and application were described. In the article it was also noticed that especially the Polish manufacturers of porous materials do not regard the problem of lubricant selection seriously. Finally, it was summarised that wider selection of new lubricants for the porous bearings enables proper design of the tribological pair for the future work conditions.
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  • Military University of Technology Faculty of Mechanical Engineering Gen. Sylwestra Kaliskiego 2, 00-908 Warsaw, Poland tel.: +48 22 6839410, fax: +48 22 6837366, a.krol@wme.wat.edu.pl
Bibliografia
  • [1] Hebda, M., Wachal, A., Tribology, WNT Publisher, Warsaw 1980 (in Polish).
  • [2] Lawrowski, Z., Tribology. Friction, wear and lubrication, PWN Publisher, Warsaw 1993 (in Polish).
  • [3] Multi-author work, Klüber special lubricants for plain bearings. The right choice made easy, Klüber Lubrication www.klueber.com, 2001.
  • [4] Miller, H., Tetzlaff, C., Well oiled. Special and additional lubricants for sintered metal plain bearings, Tribojournal, No. 1, Klüber Lubrication www.klueber.com, 2002.
  • [5] Nakagawa, et al., Lubricating oil composition for use with sintered porous bearings, U. S. Patent No. 5,631,211, 1997 May 20.
  • [6] Polish standard, Petroleum products. Protective oil Anytkol TS-120, PN-C-96080:1977 (in Polish).
  • [7] Korytkowski, B., Self-lubricating bearings – outflow of oil from porous sinter in result of temperature change, Problems of Friction, Wear and Lubrication, No. 9, pp. 25-41, Warsaw 1971 (in Polish).
  • [8] Raman, R., Vinod Babu, L., Tests on sintered bearings with reduced oil contents, Wear, No. 95, pp. 263-269, London 1984.
  • [9] Król, A., Research and analysis of the oil properties in the aspect of their selection to porous sliding bearings, Doctor’s thesis, Military University of Technology, Warsaw 2006 (in Polish).
  • [10] ASTM D5800 Standard Test Method for Evaporation Loss of Lubricating Oils by the Noack Method.
  • [11] Olexa, J., Investigation of the relations between the permeability and the service life of porous self–lubricated bearings, Wear, No. 58, pp. 1–14, London 1980.
  • [12] Kałdoński, T., Król, A., Permeability of porous sliding bearings, Proceedings of the Second International Tribology Conference: SITC 2002", Zielona Góra, August 25-28, International Journal of Applied Mechanics and Engineering, Special issue: “SITC 2002”, Vol. 7, pp. 255-262, Zielona Góra 2002.
  • [13] Zozulia, W. D., Lubricants for self-lubricating bearings, Published by Technics, Kiev, 1976 (in Russian).
  • [14] Giemza, B., Kałdoński, T., Impregnation of porous sleeves by greases, Research Works of The Vroclav University of Technology, Series Conferences, No. 27, pp.88–93, Vroclav 2002 (in Polish).
  • [15] Giemza, B., Kałdoński T., Greases as lubricant for porous bearings, Proceedings of 14th International Colloquium Tribology: Tribology and Lubrication Engineering, Vol. 2, pp. 683-689, Technische Akademie Esslingen, 2004.
  • [16] Krzemiński, K., Sliding bearings with the sleeve properties gradient. Assistant proffesors dissertation, Mechanics, No. 193, Published by The Warsaw Univeristy of Technology, Warsaw 2002 (in Polish).
  • [17] Kałdoński, T., Influence of the boron nitride on the operational properties of greases applied to sliding bearings, Tribology, No. 5-6, pp. 640–646, Radom 1997 (in Polish).
  • [18] Kałdoński, T., Influence of the boron nitride and kind of grease on the lubrication process of porous bearing, Tribology, No. 5-6, pp. 647–652, Radom 1997 (in Polish).
  • [19] Hidekazu, T., Motohiro, M., Development of magnetic fluid-impregnated sintered bearing with excellent high-speed rotational accuracy, Hitachi Powder Metals Technical Report, No. 3, 2004.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ8-0005-0006
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