Selected problems of experimental investigation of dynamically loaded journal bearings

• Autorzy: Sikora J. , Kłopocki J. , Majewski W.
• Języki publikacji: EN

Abstrakty

EN

In the paper some problems concerning relations between external bearing loadings and critical lining stresses are described for test stand with rotating load vector. According to the standard ISO 7905/1 this type of test stand, for dynamically loaded slide bearing, is recommended as a basic research unit for material testing in a complete bearing unit. The lining stress calculation results occurred being dependent on applied calculation model. The influence of sliding surface shape and housing stiffness on bearing fatigue have been considered. The MWO-stand operational principle, standard tested half-bearing, bearing housing of rigid profile, bearing housing of edge elastic profile, distribution of radial and circumferential stress in the slide layer of the bearing bush tested in MWO stand, typical damage of the bearing tested, finite element model geometry for bush and housing are illustrated in the paper. Performed calculations revealed that neglecting the shape and dimensions of the housing in calculation model of the contemporary thin-walled multilayer bearing bushes are leading to incorrect evaluation of critical stresses leading to fatigue cracks in slide layers of the bearing tested in machines with rotary load vector. That kind of bearing alloys is not employed in highly dynamically loaded bearings of contemporary machines, especially in IC engine bearing systems.

Słowa kluczowe

EN

combustion engine; engine parts; bearings; tribology; bearing fatigue

• 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: 2007
• Tom: Vol. 14, No. 4
• Strony: 433--440
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Sikora J.

autor

Kłopocki J.

autor

Majewski W.

• Technical University of Gdańsk Mechanical Engineering Faculty Narutowicza 11/12, 80-952 Gdańsk tel. [phone], fax [phone],

Bibliografia

• [1] ISO 7905/1-4; 1995: Plain bearings – Bearing fatigue-Part I: Plain bearings is test rig and in applications under conditions of hydrodynamic lubrication.
• [2] Sikora, J., Stanowisko do badania wytrzymałości zmęczeniowej cienkościennych panwi ślizgowych, Zmęczenie i Mechanika Pekania, Materiały XIX Sympozjum Zmęczenia i Mechaniki Pękania, Bydgoszcz, ATR, s. 242-249, 2002.
• [3] Sikora J., Studia nad metodyką badania wytrzymałosci zmeczeniowej łożysk slizgowych poprzecznych, Zesz. Nauk. Polit. Gdańskiej, nr 534, Mechanika nr 74, s. 3-228, 1996.
• [4] Sikora, J., Fatigue investigation of plain journal bearings, NORTRIB”98: Proceedings of the 8th International Conference on Tribology, Ebeltoft (Dania), 8-10.06.1998, DTI Tribology Centre, 1998.
• [5] Lang, O. R., Gleitlager-Ermüdung unter dynamischer Last, VDI-Berichte, Nr 248, 1975.
• [6] Harbordt, J., Beitrag zur theoretischen Ermittlung der Spannungen in der Schalen von Gleitlagern, Diss TU Karlsruhe ,1976.
• [7] Hacifazlioglu, A., Karadeniz, S., A parametric study of stress sources in journal bearing, Journal of Mechanical, Vol. 38, No 8-9, pp. 1001-1015, 1996.