Numerical modeling and design of a wavy thrust bearing

• Autorzy: Choy F. K. , Braun M. J. , Zhao H.
• Języki publikacji: EN

Abstrakty

EN

The objective of this paper is to present the analytical and numerical development leading to the simulation of a wavy thrust bearings. The analytical formulation is based on the application of the Reynolds equation to the geometry of two parallel circular plates with prescribed boundary conditions at their inner and outer circumferential edges. The upper plate is assumed to be rotating while the lower plate, which is wavy in geometry, is stationary. A numerical procedure based on the discretisation of the Reynolds equation yields a finite difference formulation that reduces the second order partial differential equation to a set of simultaneous algebraic equations. For a given loading condition, the equilibrium position of the rotating plate is evaluated using the Newton-Raphson search, by balancing the applied load with the force generated by the hydrodynamic fluid film resisting pressure. The stiffness of the bearing is then calculated using a numerical small perturbation procedure at the equilibrium position of the upper plate. Finally the transient motion of the journal is evaluated using a numerical integration scheme on the translational and angular acceleration parameters. General and specific conclusions are drawn based on these numerical results.

Słowa kluczowe

EN

wavy thrust bearing; thrust bearing; wavy bearing; hydrodynamic bearing; air bearing

PL

hydrodynamika; łożysko oporowe; łożysko hydrodynamiczne

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2002
• Tom: Vol. 7, no 3
• Strony: 757--769
• Opis fizyczny: Bibliogr. 7 poz., rys., wykr.

Twórcy

autor

Choy F. K.

• Department of Mechanical Engineering University of Akron, Akron, Ohio 44325-3903, U.S.A

autor

Braun M. J.

• Department of Mechanical Engineering University of Akron, Akron, Ohio 44325-3903, U.S.A

autor

Zhao H.

• Department of Mechanical Engineering University of Akron, Akron, Ohio 44325-3903, U.S.A

Bibliografia

• [1] Braun M.J., Choy F.K. and Zhou M. (1993): The effects of a hydrostatic pocket aspect ratio, and its supply orifice position and attack angle on steady-state flow pattern, pressure and shear characteristics. - ASME, Journal of Tribology, vol.115, No.4, October 1993, pp.678-685.
• [2] Braun M.J., Choy F.K., Dimofte F. and Sorab J. (1997): A novel automotive bearing designed for increase durability and dynamic stability. - Paper presented and abstract published in the Abstract Proceedings of the World Tribology Congress, London, U.K., September 8-12, 1997, pp.198.
• [3] Choy F.K., Braun M. J. and Hu Y. (1993): Nonlinear study of a misaligned hydrodynamic journal bearing. - STLE, Tribology Transactions, vol.36, No.3, pp.421-431.
• [4] Dimofte F. (1995): Wave journal bearing with compressible lubricant: Part 1. The wave bearing concept and a comparison to the plain circular bearing. - STLE, Tribology Transactions, vol.38, pp.153-160.
• [5] Lubrecht A.A., Graille D., Venner C.H. and Greenwood J.A. (1998): Waviness amplitude reduction in EHL line contacts under rolling-sliding. - ASME, J. of Tribology, vol.120, No.4, October 1998, pp.705-709.
• [6] Raimondi A. A. (1960): The influence of longitudinal and transverse profile on the load capacity of pivoted pad bearings. - ASLE Trans., vol.12, No.3, pp.206-215.
• [7] Zhao H., Choy F.K. and Braun M.J. (2001): Modeling and analysis of a wavy thrust bearing. - STLE, Tribology Transactions, January 2001, vol.45, No.l, pp.85-93.