| 摘要 |
PROBLEM TO BE SOLVED: To reduce the pressure difference between an outer space and an inner space between a cylinder and a blade. SOLUTION: A rotary fluid machine comprises the cylinder 35, an annular piston 40 which defines cylinder chambers 60, 65 into an outer cylinder chamber 60 and an inner cylinder chamber 65, respectively, and the blade 45 which defines the cylinder chambers 60, 65 into high-pressure chambers 61, 66 and low-pressure chambers 62, 67, respectively. A blade groove 7 to which the blade 45 is slidably fitted is formed in the cylinder 35. A recess 74 to which the linear part 46 of a piston 40 is slidably fitted is formed in the blade 45 between the outer blade part 72 and the inner blade part 73. The rotary fluid machine further comprises a differential pressure suppressing means 78 for suppressing the pressure difference caused between the outer space 76 between the outer blade part 72 and the blade groove 7 and between the inner blade part 73 and the blade groove 7. COPYRIGHT: (C)2009,JPO&INPIT
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