Study on Circular EHD Squeeze Films under Periodic Motion

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In this paper, circular squeeze films between a rigid plane and an elastomer attached on a rigid base or a thin circular plate under periodic motion are analyzed, and the film thickness, the film pressure, the load capacity and the absorbed power are calculated. In the experiment, thrust bearings with two kinds of compliant surfaces are vibrated and the floating height and the film pressure are measured to confirm the theory. The principal conclusions reached are ; (1) A periodic circular squeeze film has load carrying capacity and cavitation is prevented by inward pumping. (2) The power absorbability of an elastomer as a damper takes maximum value with load. (3) The theoretical power absorbability of a thin circular plate increases with load, and actually it is limited by cavitation.
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