A Study on EHD Squeeze Films between Spherical Planes under Periodic Motion

概要

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Squeeze films between spherical elastic surfaces lubricated by incompressible lubricant under sinusoidal normal motion are numerically analyzed and the effects of the curvature and the squeeze number on the floating height of the thruster, the minimum film thickness and the energy dissipation are investigated. A squeeze film bearing of silicon rubber lubricated by mineral oil is vibrated, and the film pressure and the displacement of the thruster are measured to confirm the theory. It is found that the floating height of the thruster and the minimum film thickness decrease more remarkably with an increase in load in a convex thruster whose lubricating faces are wider than the pressure generating region, the change of the film pressure in one period is very large only at a particular radial position, and this position moves outward with an increase of the load.
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