Patent ID: 7214043
Filing Date: 2007-05-08
Classification: F01C,F04C,F05C,F16C

Abstract:
1. A scroll type hydraulic machine comprising: a housing; a scroll unit received in said housing, said scroll unit including a stationary scroll, a movable scroll executing a revolving motion in a state in which the movable scroll is inhibited from rotating around on an axis thereof and pressure chambers defined between the stationary scroll and the movable scroll, and reducing or increasing volumetric capacity of the respective pressure chambers while the movable scroll is revolved; a plurality of self-rotating stoppers formed in a support surface of said housing and arranged at intervals in a peripheral direction of the movable scroll to prevent the movable scroll from rotating on its own axis; and a thrust bearing provided between the support surface of said housing and the movable scroll, and receiving a thrust load of the movable scroll, wherein said thrust bearing includes a plurality of retention holes formed in the support surface and open toward the movable scroll and arranged at intervals in a peripheral direction of the movable scroll, a plurality of sliding discs rotatably located within the retention holes and allowing sliding motion with respect to both of inner surfaces of the retention holes and the movable scroll, and a plurality of clearances disposed between each sliding disc and an inner peripheral surface of the corresponding retention hole.