| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve airtightness in a cylinder without increasing a number of components, in a rotary type fluid machine.SOLUTION: A cylindrical member 1 is a so-called cylinder. A rotor 4 has a drive shaft 40, and a cylindrical rolling piston 41. The drive shaft 40 is provided with a columnar eccentric portion having an axis different from the drive shaft 40 as a center, and the eccentric portion is fitted in on an inner peripheral side of the rolling piston 41. Therefore, if the drive shaft 40 is rotated, the rolling piston 41 is eccentrically rotated with the rotation, and rotated along an inner peripheral side of the cylindrical member 1. The rolling piston 41 has a cylindrical base material 411, and a resin layer 410 formed on an outer peripheral surface of the base material 411. The resin layer 410 is formed with a plurality of grooves, and crest parts are formed between the adjacent grooves.</p> |
