Couple stress and surface roughness effects in curvilinear thrust bearings

• Autorzy: Walicka A. , Walicki E.
• Konferencja: Second International Tribology Conference
• Języki publikacji: EN

Abstrakty

EN

On the basis of Christensen's stochastic model of rough surfaces, different forms of Reynolds equation with rotational inertia effect are obtained for various types of surface roughness pattern and for couple stress lubricant. As results one obtained the formulae expressing the mean film pressure distribution for externally pressurized bearings and for bearings with a squeeze film. A spherical squeeze film bearing is discussed as an example.

Słowa kluczowe

EN

Christensen stochastic model; couple stress; surface roughness; curvilinear surfaces; thrust bearings

PL

materiałoznawstwo; łożysko oporowe; chropowatość powierzchni

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2002
• Tom: Vol. 7, Spec. is
• Strony: 109--117
• Opis fizyczny: Bibliogr. 14 poz., rys., wykr.

Twórcy

autor

Walicka A.

• University of Zielona Góra, Department of Mechanics ul. Szafrana 2. P.O. Box 47, 65-016 Zielona Góra, POLAND

autor

Walicki E.

• University of Zielona Góra, Department of Mechanics ul. Szafrana 2. P.O. Box 47, 65-016 Zielona Góra, POLAND

Bibliografia

• [1] Andharia P.I., Gupta J.L. and Deheri G.M. (1999): Effect of transverse surface roughness on the behaviour of squeeze film in a spherical bearing. - Proc. Int. Conf.: Problems of Non-Conv. Hearing Systems NCBS’99, Appl. Mech. Eng., vol.4, Spec. Issue, pp. 19-24.
• [2] Andharia P.I., Deheri G.M. and Gupta J.L. (2001): Effect of longitudinal surface roughness on the behaviour of squeeze film in a spherical bearing. - Int. J. Appl. Mech. Eng., vol.6, No.4, pp.885-897.
• [3] Christensen H. (1969-1970): Stochastic model for hydrodynamic lubrication of rough surfaces. - Proc. Inst. Mech. Engrs, vol.184, pt.l, pp.1013-1022.
• [4] Christensen H. and Tonder K. (1971): The hydrodynamic lubrication of rough bearing surfaces of finite width. - ASME, J. Lubric. Technol., vol.93, No.2, pp.324-330.
• [5] Christensen H. and Tonder K. (1973): The hydrodynamic lubrication of rough journal bearings. - ASME, J. Lubric. Technol., vol.95, No.l, pp.166-172.
• [6] Gururajan K. and Prakash J. (1999): Surfaces roughness effects in infinitely long porous journal bearings. - ASME, J. Tribol., vol.121, No.l, pp.139-147.
• [7] Lin J.-R. (2000): Surfaces roughness effect on the dynamic stiffness and damping characteristics of compensated hydrostatic thrust bearings. - Int. J. Machine Tools Manufact., vol.40, pp.1671.
• [8] Lin J.-R. (2001): The effects of couple stresses in the squeeze film behaviour between isotropic rough rectangular plates. - Int. J. Appl. Mech. Eng., vol.6, No.4, pp.1007-1024
• [9] Prakash J. and Tiwari K. (1982): Lubrication of a porous bearing with surface corrugations. - ASME, J. Lubric. Technol., Vol.104, No.l, pp.127-134.
• [10] Stokes V.K. (1966): Couple-stress fluids. - Phys. Fluids, vol.9, No.9, pp.1709-1715.
• [11] Walicka A. (2002): Rheodynamics of Non-Newtonian Fluids Flow in Straight and Curved Channels (in Polish). - Zielona Góra, University Press.
• [12] Walicka A., Walicki E. and Raganowicz B. (1997): Mechanical parameters of a curvilinear thrust bearing lubricated by couple stress fluids. - Proc. 3rd Nat. Conf.: Problems of Unconventional Bearing Systems, May 15-16, Łódź, pp.95-101.
• [13] Walicki E. and Walicka A. (2000): Mathematical modelling of some biological bearing. - J. Smart. Mat. Struct., vol.9, No.l, pp.280-283.
• [14] Walicki E. and Walicka A. (2002): Surface roughness effects in curvilinear thrust bearings. - Proc. 6th Int. Symp. INSYCONT 2002, Sept.19-21, Cracow (in press).