Title:
SOUND DEADENING DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/125505
Kind Code:
A1
Abstract:
A sound deadening device 2 has an introduction and damping section 10. The introduction and damping section 10 is provided with: an introduction section 24 for introducing fluid; an expansion chamber 26; and a delivery section 16. The expansion chamber 26 is in communication with the introduction section 24, has a flow passage cross-section greater than that of the introduction section 24, and has a protrusion 32 on a surface extending in the direction of travel of a sound wave, the resonance of which is to be suppressed. The delivery section 16 is in communication with the expansion chamber 26, has a flow passage cross-section smaller than that of the expansion chamber 26, and delivers fluid in a direction different from the direction in which the fluid is introduced. As a result, the resonance of a sound wave is weakened to prevent an increase in sound pressure within the sound deadening device 2, thereby preventing the sound deadening effect from decreasing.
Inventors:
KIKUCHI MASAHIRO
TSUGIHASHI KAZUKI
FUKUSHIMA YOSUKE
HIRATA KAZUYA
KIUCHI SUGURU
TSUGIHASHI KAZUKI
FUKUSHIMA YOSUKE
HIRATA KAZUYA
KIUCHI SUGURU
Application Number:
PCT/JP2016/050044
Publication Date:
August 11, 2016
Filing Date:
January 04, 2016
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
F01N1/02; F01N1/08
Foreign References:
| JP2001289167A | 2001-10-19 | |||
| JPH11336526A | 1999-12-07 | |||
| JPS55146215A | 1980-11-14 | |||
| JPS5142839A | 1976-04-12 | |||
| JPH08200038A | 1996-08-06 | |||
| JPH08200039A | 1996-08-06 |
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (JP)
Mutsumi Sameshima (JP)
Mutsumi Sameshima (JP)
Download PDF: