| 摘要 |
PROBLEM TO BE SOLVED: To control vibration caused by rotation of a movable member in a rotation-type fluid machine which performs eccentric rotation with swinging movement about a fixed member and autorotation. SOLUTION: A reverse moment generation mechanism 50 is provided to the rotation-type fluid machine which includes an eccentric rotor 51 which is rotatably attached to a drive shaft 33 in a state where it is eccentric with respect to the axis X of the drive shaft 33. The eccentric rotor 51 is attached to the back side of an end plate of an annular piston 22, and is driven so that it can generate a moment in the opposite direction to the moment caused by the autorotation of the annular piston 22 about the axis X. Furthermore, a pressing mechanism 60 is provided which has a sealing 29 placed between the eccentricity rotor 51 and the annular piston 22. The sealing 29 separates the clearance space between the eccentric rotor 51 and the annular piston 22 into the inner part and the outer part in the radial direction, and partitioning the clearance space into the inner peripheral side and the outer peripheral side clearance spaces S3, S4. The pressing mechanism 60 exerts a predetermined pressure in the clearance space S3 on the inner peripheral side, and presses the annular piston 22 against a cylinder 21. COPYRIGHT: (C)2009,JPO&INPIT
|
