| 摘要 |
<p>A gas lubrication structure 1A includes: a high-temperature side cylinder 22; an expansion piston 21A, a gas lubrication being performed between the expansion piston 21 A and the high-temperature side cylinder 22, and a layer 60 arranged on an outer peripheral surface of the expansion piston 2 1 A, and made of a flexible material with a linear expansion coefficient larger than that of a base material of the piston. The thickness of the layer 60 under an ordinary temperature is equal to or more than the clearance between the layer 60 and the high-temperature side cylinder 22. Further, the thickness of the layer 60 under an ordinary temperature is set such that the clearance between the layer and the cylinder is generated, even when the layer is subject to heat expansion under a use condition.</p> |
