| 摘要 |
A fluid machine comprises a rotor (7, 9) meshed with each other in concave and convex portions (23, 26) and (25, 24), and a casing (3) enveloping these elements within cylindrical portions (43, 45) of a rotor chamber (5) and having a flow inlet port (31) and a flow outlet port (33). The cylindrical portions (43, 45) are moved to moved centers (47, 49) from standard centers (35, 37) at a predetermined distance L toward the flow inlet port (31), so that the rotor chambers (5) is expanded to cylindrical portions (55, 57) from the cylindrical portions (43, 45).
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