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Abstrakty
The flow of a power-law lubricant in a squeeze film bearing is considered. The bearing is modelled by two curvilinear rough surfaces. The flow in the bearing clearance is considered with inertia effects. Using the Christensen stochastic model of a surface roughness a closed-form solution is obtained. A step bearing and a spherical bearing are discussed as examples. It is shown that the power-law exponent and the roughness considerably influence the bearing performance.
Rocznik
Tom
Strony
1139--1161
Opis fizyczny
Bibliogr. 23 poz., tab., wykr.
Twórcy
autor
- University of Zielona Góra, Department of Mechanics ul. Szafrana 2, P.O.Box 47, 65-516 Zielona Góra, POLAND, A.Walicka@ijame.uz.zgora.pl
Bibliografia
- Agrawal V.K. (1970): Effect of lubricant inertia on squeeze film in spherical bearing. - Jap. J. Appl. Phys., vol.9, No.7, pp.831-833.
- Andharia P.I., Gupta J.L. and Deheri G.M. (1999): Effect of transverse surface roughness on the behavior of squeeze film in a spherical bearing. - Proc. Int. Conf.: Problems of Non-Conv. Bearing Systems NCBS'99, Appl. Mech. Eng., vol.4, Spec. Issue, pp.19-24.
- 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.
- Christensen H. (1969-1970): Stochastic model for hydrodynamic lubrication of rough surfaces. - Proc. Inst. Mech. Engrs, vol.184, pt 1, 1969-1970, pp.1013-1022.
- Christensen H. and Tøonder K. (1971): The hydrodynamic lubrication of rough bearing surfaces of finite width. - ASME, J. Lubric. Technol., vol.93, No.2, pp.324-330.
- Christensen H. and Tønder K. (1973): The hydrodynamic lubrication of rough journal bearings. - ASME, J. Lubric. Technol., vol.95, No.1, pp.166-172.
- Gould F. (1975): High-pressure spherical squeeze films. - J. Lubric. Technol. Trans. ASME, ser. F, vol.97, No.1, pp.207-208.
- Gururajan K. and Prakash J. (1999): Surface roughness effects in infinitely long porous journal bearing. - Journal of Tribology, Trans. ASME, vol.121, No.1, pp.139-147.
- Jurczak P. (2004): Influence of the lubricant kind on mechanical parameters of thrust bearings with a porous pads (in Polish). - PhD Thesis, University of Zielona Gora, pp.1-140.
- 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.1671-1689.
- Lin J.-R. (2001): The effect of couple stresses in the squeeze film behavior between isotropic rough rectangular plates. - Int. J. Appl. Mech. Eng., vol.6, No.4, pp.1007-1024.
- Murti P.R.K. (1975): Squeeze film in curved circular plates. - J. Lubric. Technol. Trans. AME, ser F, vol.97, No.4, pp.650-654.
- Prakash J. and Tiwari K. (1984): An analysis of the squeeze film between rough porous rectangular plates with arbitrary porous wall thickness. - Journal of Tribology, Trans. ASME, vol.106, No.2, pp.218-222.
- Prakash J. and Tiwari K. (1985): Effects of surface roughness on the squeeze film between rectangular porous annular disc with arbitrary porous wall thickness. - Int. J. Mech. Sci., vol.27, No.3, pp.135-144.
- Vora K.H. (1980): Behaviour of squeeze film between curved circular plates with a concentric circular pocket. - Wear, vol.65, pp.35-38.
- Walicka A. (1989): Accurate and Asymptotic Solutions of Simplified Sets of Equations Describing the Motion of Viscous Fluids in a Slot Bounded by Two Coaxial Surfaces of Revolution (in Polish). - Warszawa: WNT, pp.1-130.
- Walicka A. (2009): Surface roughness effects in a curvilinear squeeze film bearing lubricated by a power-law fluid. - Int. J. Appl. Mech. Engng, vol.14, No.1, pp.277-293.
- Walicka A. (2002): Rheodynamics of Non-Newtonian Fluids Flow in Straight and Curved Channels (in Polish). - Zielona Gora: University Press, pp.1-307.
- Walicka A. and Walicki E. (2002a): Surface roughness effect on the pressure distribution in curvilinear thrust bearings. - Exploitation Problems of Machines, No.3 (131), pp.157-167.
- Walicka A. and Walicki E. (2002b): Couple stress and surface roughness effects in curvilinear thrust bearings. - Int. J. Appl. Mech. Engng, vol.7, Spec. Issue: SITC, pp.109-117.
- Walicka A. and Walicki E. (2004): Rotational inertia and surface roughness effect in curvilinear thrust bearings. - Int. J. Appl. Mech. Engng, vol.9, Spec. Issue: ITC 2004, pp.329-336.
- Walicka A. and Walicki E. (2005): Rotational inertia and surface roughness effects In curvilinear thrust bearings lubricated by a couple-stress fluid. - Int. J. Appl. Mech. Engng, vol.10, No.3, pp.527-541.
- Walicki E. (2005): Rheodynamis of Bearings Lubrication (in Polish). - Zielona Góra: University Press, pp.1-556.
Typ dokumentu
Bibliografia
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