| 摘要 |
PROBLEM TO BE SOLVED: To provide a swing-type expander reduced in sliding loss in a bearing. SOLUTION: The swing-type expander 100 includes a cylinder 15, a shaft 13, a piston 19, a vane 21, and the bearing 17. The piston 19 is attached to the shaft 13 to be rotated in the cylinder 15. The vane 21 is formed integrally with the piston 19, swingingly held in a groove 15d formed at the cylinder 15, and partitions a space between the cylinder 15 and the piston 19 into a suction space 25a and a delivery space 25b. The position of the vane 21 in the peripheral direction of the shaft 13 is defined as a reference position. The bearing surface of the bearing 17 is formed with a recessed portion 130 in a range of 90-180°in the rotating direction of the shaft 13 when viewed from the reference position. COPYRIGHT: (C)2011,JPO&INPIT
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