Search of Noise Source of Spiral Vacuum Pump

Kunihiko Ishihara, Tomoya Hamada, Toshinobu Iwamoto, Akari Goto, Masanobu Tsurumoto

Noise source search, Spiral vacuum pump, Acoustic intensity, Suction truck

A Spiral vacuum pump is widely used in a low noise type suction truck. When the pump is operated, a large gear noise generates and some countermeasures are required. Then it is necessary to search the noise source position for countermeasure. Several studies are conducted to search the noise source position. As a result, it was clarified that the noise source position was not from the gear casing which is immediately think up but from an elbow near the spiral vacuum pump. In order to clarify the result, the noise source search was performed by using the current searching technique (Sound Brush made by LMS) which is 3D intensity meter and we confirmed it.

https://dx.doi.org/10.31873/IJEAS.7.12.04