Muffler and muffling device including the same

Patent metadata

Field	Value
Publication number	US-2016376930-A1
Application number	US-201415038921-A
Country	US
Kind code	A1
Filing date	Jun 16, 2014
Priority date	Dec 26, 2013
Publication date	Dec 29, 2016
Grant date	—

Abstract

Provided are: a muffler that can suitably obtain an attenuation effect of a sound wave; and a muffling device including the same. The muffler is installed on a wall surface of a pipe conduit where a gas flows. The muffler includes: a front surface exposed to an inner surface of the pipe conduit; a bottom surface facing the front surface; and a side surface disposed between the front surface and the bottom surface and covering a space between the front surface and the bottom surface. The front surface is formed with a plurality of through-holes, and the number of through-holes arrayed in a gas flow direction is one or two, and the number thereof arrayed in a direction orthogonal to the gas flow direction is 10 or more.

First claim

1 . A muffling device comprising:
a plurality of mufflers installed on a wall surface of a pipe conduit in which a gas flows; and a holding section housing the plurality of mufflers and fixed to the wall surface, wherein the plurality of mufflers respectively include:
a front surface exposed to an inner surface of the pipe conduit;
a bottom surface facing the front surface;
a side surface disposed between the front surface and the bottom surface, and configured to cover a space between the front surface and the bottom surface; and
a plurality of through-holes formed on the front surface, the number of through-holes arrayed in a flow direction of the gas being one or two, and the number of the through-holes arrayed in a direction orthogonal to the flow direction of the gas being 10 or more.

2 . The muffling device according to claim 1 , wherein the number of the through-holes arrayed in the direction orthogonal to the flow direction of the gas is 20 or less on the front surface.

3 . The muffling device according to claim 1 , wherein the side surface is a member integrally formed with the front surface.

4 . The muffling device according to claim 1 , further comprising an adjustment mechanism configured to move the bottom surface relative to the front surface and adjust volume of a space between the front surface and the bottom surface.

5 . (canceled)

6 . The muffling device according to claim 1 , wherein the holding section is formed with a plurality of recessed portions to house the mufflers in a direction parallel to flow of the gas.

7 . The muffling device according to claim 2 , wherein the side surface is a member integrally formed with the front surface.

8 . The muffling device according to claim 2 , further comprising an adjustment mechanism configured to move the bottom surface relative to the front surface and adjust volume of a space between the front surface and the bottom surface.

9 . The muffling device according to claim 3 , further comprising an adjustment mechanism configured to move the bottom surface relative to the front surface and adjust volume of a space between the front surface and the bottom surface.

10 . The muffling device according to claim 2 , wherein the holding section is formed with a plurality of recessed portions to house the mufflers in a direction parallel to flow of the gas.

11 . The muffling device according to claim 3 , wherein the holding section is formed with a plurality of recessed portions to house the mufflers in a direction parallel to flow of the gas.

12 . The muffling device according to claim 4 , wherein the holding section is formed with a plurality of recessed portions to house the mufflers in a direction parallel to flow of the gas.

13 . The muffling device according to claim 2 , further comprising an adjustment mechanism configured to move the bottom surface relative to the front surface and adjust volume of a space between the front surface and the bottom surface.

14 . The muffling device according to claim 3 , further comprising an adjustment mechanism configured to move the bottom surface relative to the front surface and adjust volume of a space between the front surface and the bottom surface.

Assignees

• Mitsubishi Heavy Ind Ltd
• Mitsubishi Heavy Ind Compressor Corp

Inventors

• Hosoya Hiroyuki
• Kudo Toshifumi
• Koda Takuro

Classifications

• F02C7/045

  having provisions for noise suppression · CPC title

• F04D17/122

  the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors · CPC title

• F04D29/4213

  suction ports · CPC title

• F05D2260/963

  by Helmholtz resonators · CPC title

• F01D25/30 Primary

  Exhaust heads, chambers, or the like · CPC title