Linear Squeeze Film with Constant Rotational Speed

Abstract

Squeeze-film action in lubrication is present in many mechanical components, such as bearings, squeeze-film dampers, piston pins, and piston rings, as well as in natural and artificial joints. These mechanical components experience both rotation and squeeze action. In this paper, an experimental and theoretical model is developed that takes into account the combination of rotational speed as well as squeeze-film action in journal bearings. The vertical bearings, such as those in vertical pumps, are considered as well as the horizontal bearings. The governing equation and boundary conditions are derived for this purpose. Both the classical hydrodynamic lubrication theory and the mass conservation cavitation algorithm are considered. A comparison of the results of a series of experimental measurements and theoretical prediction show that they are in reasonable agreement. Examples are provided to illustrate how the results can be used in practice.

KEY WORDS:

• Squeeze Film
• Vertical Bearing
• Reynolds Equation
• Cavitation Algorithm

ACKNOWLEDGEMENTS

The authors would like to gratefully acknowledge the assistance of Michael Ciolino and Sean Odom during the experimental phase of this project.