| 摘要 |
PURPOSE:To obtain the fluid stream having a certain flow rate and the superior controllability by installing a driving power source which possesses the adjusting function for allowing the driving frequency of a vibrating plate installed onto the bottom surface of a wall body to accord with the resonance frequency determined according to the dimension condition of a driving tube. CONSTITUTION:A vibrating plate 13 is installed in parallel to the bottom surface of a circular truncated cone shaped wall body 18 at the wall surface part of the space 11 in front of a coil 15, and a driving tube 12 is connected vertically to the surface of the top part. When electric power is supplied into the coil 15 by the sine-wave voltage having a frequency of f0 determined by a specific equation by an electric power source apparatus (not shown in the figure), a vibrating plate 14 and a coil 13 supported by a spring 14 are vibrated right and left by the mutual action between a permanent magnet 16. Since the space 11 and the driving tube 12 satisfy the equal frequency condition of f0, the column-shaped fluid 23 in the driving tube 12 vibrates as if the fluid is formed in integral form. When the column-shaped fluid 23 moves rightward, the fluid in the vicinity of the inlet of the driving tube 12 is driven rightward, and when the fluid moves leftward, the fluid on the periphery is inhaled, and the fluid stream having the superior controllability can be obtained with several cycles after the start of operation.
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