Analytical, Numerical, and Experimental Investigation of the Flow Structure in a Flooded Ball Bearing

[+] Author and Article Information
Daniel H. Fruman, Ibtissem Benmansour, Chérif Nouar

Groups Phénomènes d’Interface, ENSTA, 91120 Palaiseau, France

Thierry Bidot, Jean-Marc Vanel

SIMULOG, 1, rue James Joule, 78280 Guyancourt, France

J. Tribol 118(4), 865-871 (Oct 01, 1996) (7 pages) doi:10.1115/1.2831620 History: Received January 05, 1995; Revised October 05, 1995; Online January 24, 2008


Using an order of magnitude estimate of the leading terms in the equations of motion, the three-dimensional flow in a flooded ball bearing is reduced to the investigation of two-dimensional flow problems in a series of bearing cross sections. Combining, through appropriate compatibility conditions, the individual analytical solutions for the spaces confined between the cage and the inner wall of the rings, the halls and the rings and the balls and the cage’s holes, a very simple analytical model is derived. It allows the computation, in the laminar regime, of the flow rate, the pressure drop, and the velocity profile in different cross sections of the confined spaces. The results of the analytical model are confirmed by those obtained using a CFD code and extended to the turbulent regime. The analytical and numerical results are compared to those obtained from flow visualizations and velocity measurements conducted in a specially designed large scale model of a ball bearing. The agreement is very satisfactory.

Copyright © 1996 by The American Society of Mechanical Engineers
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