| 摘要 |
PROBLEM TO BE SOLVED: To provide a positive-displacement expansion machine that has solved the problem that are attributable to vibrations and noises of the positive-displacement expansion machine, and to failures of suction pipes, resulting from the production of very large pressure pulsation in suction pipes due to pressure rise in a working fluid caused by change in kinetic momentum associated with fluctuation in flow speeds, since a conventional positive-displacement expansion machine sucks working fluid with a large bulk modulus and lack of compressibility as a working fluid. SOLUTION: There is provided a dynamic vibration damper 200 composed of a suction pipe 117, a vibrator 201, a coil spring 202, and a pedestal 203. The vibrator 201 is of a cylindrical form concentrical with the suction pipe 117, and is reciprocatably fit in axial direction of the suction pipe 117. The inner diameter of the coil spring 202 is formed larger than the suction pipe 117, and the coil spring 202 is fit into the suction pipe 117 to fix the vibrator 201 at both sides. One end face of the coil spring 202 is in contact with the vibrator 201, and the other end face is in contact with the pedestal 203 which is fixed to the suction pipe 117. COPYRIGHT: (C)2007,JPO&INPIT
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