| 摘要 |
PROBLEM TO BE SOLVED: To exercise the capability of a pulsation absorption device (silencer) by providing a location serving as a node of a standing wave in a pipe in a positive way, placing a resonance box that resonates in noise targeted for pulsation or noise reduction to be suppressed at a position of an antinode of the standing wave (position of 1/4 wavelength), a resonance float device, a pulsation absorption device (silencer) such as 1/4 wavelength pipe or the like. SOLUTION: A buffer tank (pressure buffering chamber) 13 is placed in the middle of gas pipes 11 and 12. Three side branches 14, 15 and 16 that absorb pressure fluctuations of frequencies f1, f2 and f3 respectively are branch- connected to positions of distances D1, D2 and D3 of 1/4 wavelength from the connecting portion of the gas pipe 11 and the buffer tank 13 (position of node of the standing wave) respectively. The length of pipe passage of each side branch 14, 15 and 16 in the length L1, L2, and L3, respectively, each corresponding to 1/4 wavelength. As a pulsation absorption device (silencer), a resonance box or a resonance float device may be used in addition to the side branches. COPYRIGHT: (C)2003,JPO
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