Sound attenuator as well as elements and a method of production thereof

Patent metadata

Field	Value
Publication number	US-12305547-B2
Application number	US-202017426195-A
Country	US
Kind code	B2
Filing date	Jan 29, 2020
Priority date	Jan 29, 2019
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

In the present disclosure is proposed a novel sound attenuating element for, at least in part, providing adequate or preferably improved sound attenuating properties without excessively impeding flow while being susceptible to automated or machine assisted manufacturing or for providing the public with a useful alternative. The novel sound attenuating element is formed at least in part by an assembly of a plurality of components which are successively connected to each other, which each exhibit a curved shape, and which form at least one non-planar ruled surface when assembled.

First claim

The invention claimed is:

1. A sound attenuating element, which is formed at least in part by an assembly of a plurality of components, which:
are successively connected to each other along a first axis,
each exhibit an elongated shape such that a dimension of elongation extends perpendicularly to the first axis thereby forming an axis of elongation,
are each bent along the axis of elongation to exhibit a curved shape, and which
form at least one non-planar ruled surface when assembled, wherein every second component in the assembly extends in a non-straight angle, in respect to the successive component, wherein the components are elongated plates that are successively layered in the assembly,
wherein the components comprise interlocking shapes to form a cross-wise subassembly of two interlocking components.

2. The sound attenuating element according to claim 1 , wherein the components comprise micro-perforations.

3. The sound attenuating element according to claim 1 , wherein the plurality of components are successively connected along a first axis so as to form a helicoid.

4. The sound attenuating element according to claim 3 , wherein the components are each curved about an axis which is perpendicular to the first axis.

5. The sound attenuating element according to claim 1 , wherein each layer of components is formed of two components attached to each other cross-wise.

6. The sound attenuating element according to claim 1 , wherein the interlocking shape is a notch, wherein the notch is configured so that the cross-wise subassembly is arranged so that edges of the plates, which are perpendicular to the first axis, are coplanar.

7. The sound attenuating element according to claim 1 , wherein the sound attenuating element is configured to be installed in a duct.

8. The sound attenuating element according to claim 1 , wherein the components in the assembly exhibit a shorter dimension along the first axis than in a dimension perpendicular to the first axis.

9. An enclosure for a sound attenuator, comprising:
several spiral guides, which are configured to receive a plurality of components in a successively layered fashion so as to create at least one non-planar ruled surface for contacting a gaseous current,
a first set of mutually opposing guides comprising a first and second guide, each guide configured to receive a respective opposing end of an elongated component to extend between the guides, and
a second set of mutually opposing guides comprising a third and fourth guide, each guide configured to receive a respective opposing end of an elongated component to extend between the guides,
wherein the two sets of opposing guides are angularly offset from each other about a first axis, wherein the two sets of opposing guides are configured to receive cross-wise subassemblies of two components along a first axis as a sound attenuating element covering an inner space defined by the enclosure when viewed along the first axis.

10. The enclosure according to claim 9 , wherein the guide is a groove.

11. The enclosure according to claim 10 , wherein the groove is provided to an inner surface of the enclosure.

12. The enclosure according to claim 11 , wherein the guide is configured to bend the components.

13. The enclosure according to claim 11 , wherein the guide is configured to bend the components so as to form a helicoid.

14. The enclosure according to claim 9 , wherein the components are plates that are elongated in an elongation dimension, wherein the guide is configured to bend the components about said elongation dimension.

15. A sound attenuator, comprising:
an enclosure, which comprises:
several spiral guides, which are configured to receive a plurality of components in a successively layered fashion so as to create at least one non-planar ruled surface for contacting a gaseous current,
a first set of mutually opposing guides comprising a first and second guide, each guide configured to receive a respective opposing end of an elongated component to extend between the guides, and
a second set of mutually opposing guides comprising a third and fourth guide, each guide configured to receive a respective opposing end of an elongated component to extend between the guides,

wherein the two sets of opposing guides are angularly offset from each other about a first axis, wherein the two sets of opposing guides are configured to receive cross-wise subassemblies of two components along a first axis, and
a sound attenuating element installed into the enclosure, which sound attenuating element is formed at least in part by an assembly of a plurality of components, which:
are successively connected to each other along the first axis,
each exhibit an elongated shape such that a dimension of elongation extends perpendicularly to the first axis,
are each bent along the axis of elongation to exhibit a curved shape, and which
form at least one non-planar ruled surface when assembled,

wherein every second component in the assembly extends in a non-straight angle, e.g. a right angle, in respect to the successive component.

16. The sound attenuator according to claim 15 , wherein the sound attenuator is an in-duct attenuator.

17. The sound attenuator according to claim 15 , wherein:
the sound attenuator is elongated along the first axis, and wherein
the sound attenuating element covers an inner space defined by the enclosure when viewed along the first axis.

18. A method of producing a sound attenuator comprising:
providing an enclosure, which comprises:
several spiral guides, which are configured to receive a plurality of components in a successively layered fashion so as to create at least one non-planar ruled surface for contacting a gaseous current,
a first set of mutually opposing guides comprising a first and second guide, each guide configured to receive a respective opposing end of an elongated component to extend between the guides, and
a second set of such mutually opposing guides comprising a third and fourth guide, each guide configured to receive a respective opposing end of an elongated component to extend between the guides,

wherein the two sets of opposing guides are angularly offset from each other about a first axis, wherein the two sets of opposing guides are configured to receive cross-wise subassemblies of two components along the first axis,
providing a sound attenuating element formed at least in part by an assembly of a plurality of components, which:
are successively connected to each other along the first axis,
each exhibit an elongated shape such that a dimension of elongation extends perpendicularly to the first axis,
are each bent along the axis of elongation to exhibit a curved shape, and which form at least one non-planar ruled surface when assembled,

wherein every second component in the assembly extends in a non-straight angle, e.g. a right angle, in respect to the successive component, and
installing the sound attenuating element into the guide of the enclosure so as to form a non-planar ruled surface for contacting gaseous currents.

19. The method according to claim 18 , wherein the installment of the sound attenuating element comprises introducing individual components or individual sub-assemblies of cross-wise connected components into the guide of the enclosure in a successive fashion.

Assignees

• Teknologian Tutkimuskeskus Vtt Oy

Inventors

• Komi Erin
• Tanttari Jukka
• Hynninen Antti
• Uosukainen Seppo

Classifications

• F01N2490/16

  Chambers with particular shapes, e.g. spherical · CPC title

• F01N2450/20

  by mechanical joints, e.g. by deforming housing, tube, baffle plate or parts thereof · CPC title

• F01N1/086

  having means to impart a whirling motion to the exhaust gases (with helically or spirally shaped channels F01N1/12) · CPC title

• F01N2450/06

  Inserting sound absorbing material into a chamber · CPC title

• F01N1/12 Primary

  using spirally or helically shaped channels (cyclones B04C) · CPC title