ROTARY FLUID MACHINE

摘要

A rotary fluid machine having a stationary member and a movable member forming a fluid chamber along with the stationary member. In the rotary fluid machine in which the movable member eccentrically rotates about the stationary member while swinging, vibration caused by the rotation of the movable member is suppressed. The rotary fluid machine has an annular piston (22), a drive shaft (33) rotated and driven about a rotation axis (X), and a cylinder (21) eccentrically and rotatably installed on the drive shaft (33) and forming cylinder chambers (C1, C2) along with the annular piston (22). When the cylinder (21) rotates eccentrically, the volumes of the cylinder chambers (C1, C2) vary. The cylinder (21) is adapted to swing while rotating. The rotary fluid machine further has a reverse moment generation mechanism (50) for generating moment directed opposite to moment about the rotation axis (X) caused by the rotation of the cylinder (21).