| 摘要 |
<p>The purpose of the present invention is to provide: a piston ring that can resolve both the problem of ensuring the seal performance of a piston ring for a compressor and the problem of reducing abrasion of the piston ring due to the balance of sliding section surface pressure; and a compressor using such a piston ring. In order to resolve these problems, the piston ring is provided, in an engagement opening section thereof, with a first engagement opening section that overlaps in a step shape in the height direction of the piston ring and a second engagement opening section that overlaps in a lip shape in the radial direction of the piston ring; an end section of the first engagement opening section has, on the pressure side, a first engagement opening groove via which the inner periphery and the outer periphery of the piston ring are linked; an end section of the second engagement opening section has, on the non-pressure side, a second engagement opening groove via which the inner periphery and the outer periphery of the piston ring are not linked due to the overlap of the lip shape; and the outer periphery of the piston ring is provided with a circumferential groove that is linked to the first engagement opening groove and is not linked to the second engagement opening groove. Due to this configuration, abrasion of sliding surfaces can be reduced without causing a decrease in the performance of the piston ring.</p> |
