| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pump device in which electromagnetic noise to be generated from a pump main body, mechanical noise, and hydraulic noise are shut off on a transmission path, concerning the pump device to be used for the transportation of air, water, or the like. SOLUTION: In a pump device, a pump main body 1 is covered with an enclosure 3, and sound absorbing powder in which the peak of the sound absorption coefficient is adjusted to the vicinity of frequency for applying a maximum value of electromagnetic noise to be generated from the pump main body 1 is arranged on the front surface of the pump main body 1 or the inner surface of the enclosure 3.</p> |
