| 摘要 |
PURPOSE:To facilitate flow rate adjustment and output power control in such an arrangement that a shaft member is fitted in a hole in a hole member, by forming a spiral groove in either of the inner peripheral surface of the hole member and the outer peripheral surface of the shaft, and by disposing a spiral seal in the spiral groove. CONSTITUTION:A shaft member 11 in which a spiral seal 3 is fitted in a spiral groove 3 formed in the outer peripheral surface thereof, is fitted in a cylindrical hole member 4. The axial center selection of the hole member 4 has a small diameter part 4a having a diameter smaller than that of both end parts thereof, and the outer periphery of the spiral seal member 3 is made to slide on the inner peripheral surface of the small diameter part 4a. Further, it is arranged such that when fluid is allowed to flow from an inlet port 5 to an outlet port 6 which are formed in the axial both end parts of the hole member 4, the fluid is subjected to resistance in a spiral passage 7 formed by the part of the spiral seal 3, and thus obtained resistance is used to rotate the shaft member 1 by means of the spiral seal 3 so that power may be taken out. Further, in the case of the drive rotation of the shaft member 1, it functions as a pump.
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