Sound-damping air conduction part

Patent metadata

Field	Value
Publication number	US-10458675-B2
Application number	US-201715445345-A
Country	US
Kind code	B2
Filing date	Feb 28, 2017
Priority date	Feb 29, 2016
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

An air conduction part for conducting a compressible medium, which part has a cross section through which the medium passes in a flow direction of the medium when the air conduction part is used, which flow direction approximately corresponds to a longitudinal axis of the air conduction part, the air conduction part including at least one wall arrangement that laterally defines the cross section of the air conduction part and conducts the medium. The wall arrangement are provided with at least one shell and with at least one damping device that removes sound energy from the medium, and the shell and the damping device are integrally interconnected so that, with a justifiable amount of outlay, the resulting air conduction parts effectively damp sound and the transport direction of the medium and/or the cross section of the air conduction part may change.

First claim

What is claimed is:

1. An air conduction part for conducting a compressible medium therethrough, the air conduction part comprising:
At least one wall arrangement that laterally defines a cross section of the air conduction part, through which the medium passes in a flow direction of the compressible medium when the air conduction part is in use, the flow direction approximately corresponding to a longitudinal axis of the air conduction part, the wall arrangement comprising:
at least one shell; and
at least one damping device configured to remove sound energy from the medium,
wherein the shell and the at least one damping device are integrally interconnected by support members, and
wherein the at least one damping device comprises at least one sound absorption element having at least one sound-dissipating medium,
wherein the wall arrangement is disposed at least in a region of the air conduction part comprising a bend in the flow direction, and the support member extends radially inwards toward a center of the bend.

2. The air conduction part of claim 1 , wherein the at least one shell and the at least one damping device of the at least one wall arrangement are formed in one piece.

3. The air conduction part of claim 1 , wherein the at least one wall arrangement extends around the longitudinal axis of the air conduction part and forms a closed face.

4. The air conduction part of claim 1 , wherein the at least one shell is an outer shell, the air conduction part comprising at least two perforated inner shells, the at least one damping device being arranged radially between the perforated inner shells.

5. The air conduction part of claim 1 , wherein the at least one shell is an outer shell, which is formed such that the at least one wall arrangement comprises a variable cross section to bypass a disruptive extraneous shape, the air conduction part comprising at least one perforated inner shell.

6. The air conduction part of claim 5 , wherein the at least one damping device is arranged radially between the outer shell and the inner shell so that the at least one damping device has a variable thickness.

7. The air conduction part of claim 1 , wherein the at least one wall arrangement comprises a plurality of shells, and wherein the at least one damping device is arranged between at least two shells of the plurality of shells.

8. The air conduction part of claim 1 , wherein at least one shell of the plurality of shells of the at least one wall arrangement has a perforated structure.

9. The air conduction part of claim 1 , further comprising a further wall arrangement on the air conduction part including a plurality of shells, between which at least one sound absorption element is arranged, the plurality of shells and the at least one sound absorption element together forming a Helmholtz resonator.

10. The air conduction part of claim 1 , wherein the cross section of the air conduction part comprising the at least one wall arrangement has a uniform curvature.

11. The air conduction part of claim 1 , wherein the air conduction part comprising the at least one wall arrangement forms a pipe portion having a round cross section.

12. The air conduction part of claim 1 , wherein an outer shell of the wall arrangement has curved shape while an inner shell has a constant shape, such that a wall thickness of the air conduction part has a uniformly changing cross section at least for a portion of the longitudinal extension thereof.

13. The air conduction part of claim 1 , wherein the cross section of the air conduction part has a geometric shape.

14. The air conduction part of claim 1 , wherein the at least one sound-dissipating medium includes a porous absorption material.

15. The air conduction part of claim 11 , wherein the air conduction part comprising the at least one wall arrangement forms a channel having a circular or elliptical cross section.

16. The air conduction part of claim 12 , wherein the geometric shape of the cross section of the air conduction part is point-symmetric with respect to the longitudinal axis thereof or mirror-symmetric with respect to a plane containing the longitudinal axis.

17. A method for producing an air conduction part for conducting a compressible medium therethrough, the method comprising:
providing at least one wall arrangement that laterally defines a cross section of the air conduction part, through which the medium passes in a flow direction of the compressible medium when the air conduction part is in use, the flow direction approximately corresponding to a longitudinal axis of the air conduction part and the wall arrangement of the air conduction part comprises at least one shell and at least one damping device that removes sound energy from the medium,
wherein the at least one shell member and the at least one damping device are integrally interconnected by support members,
wherein the at least one damping device comprises at least one sound absorption element having at least one sound-dissipating medium, and
wherein the wall arrangement is disposed at least in a region of the air conduction part comprising a bend in the flow direction, and the support members extend radially inwards toward a center of the bend.

18. The method of claim 17 , wherein the at least one shell and the at least one damping device of the wall arrangement are produced in a generative manufacturing process.

19. The method of claim 18 , wherein the wall arrangement is manufactured by a stereolithography process.

20. The method of claim 17 , wherein the at least one sound-dissipating medium includes a porous absorption material.

Assignees

• Airbus Operations Gmbh

Inventors

• Siercke Matthias
• Holmgren Joakim
• Kerber Markus
• Naumann Sergej
• Wurr Uwe
• Robrecht Volker
• Pachale Urs

Classifications

• F24F13/0245

  Manufacturing or assembly of air ducts; Methods therefor · CPC title

• F24F2013/242

  Sound-absorbing material · CPC title

• F24F13/24 Primary

  Means for preventing or suppressing noise · CPC title

• F24F13/0281

  Multilayer duct · CPC title

• G10K11/161

  in systems with fluid flow (G10K11/162 takes precedence; gas flow silencers or exhaust apparatus for machines or engines in general or for internal combustion engine F01N, noise absorbers in pipes or pipe systems F16L55/02; noise absorption in air conditioning and ventilation F24F13/24; silencing exhaust or propulsion jets in aircraft B64D33/06) · CPC title