Capacity forces in slide journal plane bearing by laminar unsteady lubrication

• Autorzy: Krasowski P.
• Języki publikacji: EN

Abstrakty

EN

This paper shows results of numerical solutions an modified Reynolds equations for laminar unsteady oil flow in slide journal bearing with planar linear gap. Discussed case of the solution to the Reynolds equation for the unsteady laminar Newtonian flow of lubricating factor allows initial estimation of hydrodynamic pressure distribution and its capacity as a basic operational parameter of the slide bearing. Unsteady axial velocity perturbation on the race surface and slide has influence on the hydrodynamic pressure distribution of the capacity of the lubricated gap. Pressure changes in the bearing are seasonal and equal to the lasting period of velocity perturbation. The level of changes and its nature depends on the kind of perturbation. This solution example applies to isothermal bearing model with infinity length. Lubricating oil used in this model has Newtonian properties and dynamic viscosity in dependence on pressure. It shows a preliminary analysis change of capacity forces in the bearing by laminar, unsteady lubrication caused by velocity perturbations of oil flow in the longitudinal direction of a bearing. Described effect can be used as an example of modeling the bearing friction node operations in reciprocating movement during exploitation of engines and machines. Plane crossbar journal bearing occur in ship combustion engine as a crosshead bearing. Results are presented in the dimensionless hydrodynamic pressure and capacity force diagrams.

Słowa kluczowe

EN

journal plane bearing; lubrication; unsteady laminar oil flow; pressure distribution; capacity forces

• 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: 2008
• Tom: Vol. 15, No. 3
• Strony: 245--252
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Krasowski P.

• Gdynia Maritime University Faculty of Marine Engineering Morska Street 83-87, 81-225 Gdynia, Poland tel.:[phone], fax: [phone],

Bibliografia

• [1]Krasowski P.: Laminar, unsteady lubrication of slide journal bearing in magnetic field with dynamic viscosity depended on pressure, (in Polish), Tribologia 4/2002 (184), pp. 1189-1200.
• [2] Krasowski P.: Hydrodynamic pressure and capacity force in slide journal bearing with linear contracting gap. (in Polish) Technical University Press, ZN Budownictwo Okrtowe Nr 65, Gdańsk 2004, pp.105-112.
• [3] Krasowski P.: Modelling of laminar unsteady and unsymmetrical flow in slide journal bearing with linear contracting gap. (in Polish) Maritime University of Gdynia, Faculty of Marine Engeeniering, (non publish).
• [4] Wierzcholski K.: Mathematical methods in hydrodynamic theory of lubrication, Technical University Press, Szczecin 1993.
• [5] Wierzcholski K.: Theory unconventional lubricant slide journal bearing, Technical University Press, Szczecin 1995.