DE102016207411A1 - SOUND ABSORPTION DEVICE AND INSULATION COMPONENT FOR AN AIR-OR SPACE VEHICLE - Google Patents

Abstract

The present invention relates to a sound absorption device (1) for an aircraft or spacecraft, comprising a support part (2) and a plurality of vibration bodies (3) distributed over an arrangement surface (7) and connected to the support part (2), wherein the carrier part (2) has a mass related to the arrangement surface (7) which is smaller than a mass of the vibration bodies (3) relative to a projection surface occupied by the vibration bodies (3) on the arrangement surface (7).
Furthermore, an insulation component (10) for an aircraft or spacecraft is described, which has a first insulation layer (11) and the sound absorption device (1) adjoining a first surface (11a) of the first insulation layer (11).

Description

The present invention relates to a sound absorbing device and an insulating member for an aircraft or spacecraft.

To increase the comfort for passengers are on vehicles, the passenger cabins usually provided with a sound insulation. In aircraft, glass wool mats are usually used for this purpose.

The DE 10 2008 017 357 A1 discloses a sandwich element for sound-insulating lining a means of transport with two cover layers and a core layer arranged between them. The core layer has a honeycomb-like structure. At least one of the cover layers has a perforation to improve the sound absorption effect of the sandwich element.

The DE 10 2009 032 497 A1 discloses a sound insulation for the cabin of an aircraft in which a plurality of point masses for insulation in the lower frequency range are arranged directly on the cabin wall.

It is an object of the present invention, a sound absorption device with which an improved soundproofing effect is achieved against low-frequency noise and which can be mounted in a reliable and simple manner, and to provide such an insulating component.

This object is achieved in each case by a sound absorption device having the features of claim 1 and by an insulation component having the features of claim 9.

Advantageous embodiments and further developments are specified in the subclaims referring back to the independent claims.

According to a first aspect of the invention, there is provided a sound absorbing device for an aerospace vehicle having a support member and a plurality of vibrating bodies distributed over an arrangement surface and connected to the support member, the support member having a mass related to the arrangement surface is less than a mass of the vibrating bodies relative to a projection area occupied by the vibrating bodies on the locating surface.

In particular, it can be provided that the mass of the carrier part related to the arrangement surface is less than or equal to 10 percent, in particular less than or equal to 1 percent and particularly preferably less than or equal to 0.1 percent of the mass of the plurality of vibrating bodies related to the projection surface.

In particular, the arrangement surface can be defined as a surface delimited by a boundary line, wherein the boundary line runs in such a way that all vibration masses are arranged with a minimum surface area of the surface within the boundary line. The arrangement surface may be formed, for example, by a partial surface of a surface of the support member or by a surface of the support member as a whole.

The mass referred to the placement surface is a measure of mass per unit area, for example, in units of kilograms per square meter.

The projection area occupied by the vibration bodies on the arrangement surface is defined by the sum of the areas of the projection surfaces of the vibration bodies resulting from perpendicular projection of the respective vibration body in its arrangement state on the support part onto the arrangement surface.

The mass referred to the projection surface is a measure of a mass per area, for example, with one unit kilogram per square meter.

By the support member, which may be formed in particular as a separate part of the vibration bodies, a separate arrangement structure for the vibration body is created. This has the advantage that the sound absorption device can be advantageously used in a variety of installation situations. For example, this can be done directly on a fuselage structure of the aircraft or spacecraft, which is advantageous in terms of a combination with different insulation layers. Also, the vibrating bodies can be advantageously combined advantageously with a plurality of different insulating layers in a simple manner.

The vibration bodies can be excited by sound waves to vibrate. In particular, the energy of the sound waves is transmitted to the vibration bodies. Advantageously, the support member elastically deformable, in particular limp, be formed. In this way, the support member forms a spring-damper system for the vibration body, which causes an efficient sound insulation, especially in the low-frequency range.

In particular, the carrier part and the vibration bodies or masses can be made be formed of different materials, wherein the carrier part in particular made of a lightweight material, such. As a plastic, and the vibration masses in particular from a heavy material such. As a metal material or a ceramic may be formed. In particular, it can be provided that the carrier part and the vibration masses in the mutually fixed state have different densities.

The support member and the vibration masses can also be in one piece, z. B. in material unit, be formed. In this case, the vibration masses may be formed for example by local material accumulations. Preferably, the vibration masses have a very small volume, so that they can be considered approximately as point masses.

The vibration bodies may be arranged in particular in matrix form. Alternatively, the vibrating bodies may also be distributed irregularly. Furthermore, concentric arrangements of the vibration body or similar arrangements are conceivable.

Furthermore, it can be provided that all vibration bodies have the same or approximately the same mass. For example, it may be provided that the mass of a single vibration body of the plurality of vibration bodies deviates by a maximum of 10 percent, in particular by a maximum of 5 percent, and particularly preferably by a maximum of 1 percent, from an average value of the masses of the old vibration bodies. This is particularly advantageous if sound waves are to be absorbed in a narrowly restricted frequency range.

Alternatively, it can be provided that the vibration bodies each have different masses. In particular, a plurality of groups of vibration bodies may be provided, wherein the vibration bodies of a group each have approximately equal masses, for. B. above mentioned proviso, and the vibrating body of different groups have different masses. In particular, it can be provided that the masses of the vibration bodies of a group differ from the masses of the vibration bodies of a further group by at least 10 percent. In this way, by forming a plurality of different groups a plurality of individual spring-damper systems are formed, which are each designed for sound absorption in a certain frequency range. Thus, noise over a wide frequency range can be mitigated.

The carrier part may in particular be formed by a carrier foil. This has the advantage that the carrier part can be used simultaneously as a protective film or cover layer for an insulating layer, as will be described in more detail later. The carrier film may have a plurality of recesses. These are suitable for breaking and / or reflecting sound waves. Thus, the sound insulation effect of the sound absorption device is further improved.

Furthermore, it can be provided that the oscillating bodies are arranged between a first surface of the carrier part and a fixing layer, which is connected to a first surface with the first surface of the carrier part. For a reliable fixation of the vibration masses is achieved on the support member. The fixation layer may alternatively or in addition to a direct fixation of the vibration body or vibration masses carried on the support member. In particular, the vibrating bodies can also be bonded, welded or the like to the carrier part, in particular to the carrier foil.

The fixation layer may in particular be formed by a plurality of fixation layer parts, for example in the form of fixation layer strips, wherein at least one vibration element is arranged between in each case one fixation layer part and the support part. Instead of fixation layer strips, differently shaped fixation layer parts, such as, for example, circular, triangular, polygonal, rectangular spots, may also be provided.

Alternatively, it can be provided that the fixing layer is formed by a fixing film. In contrast to the fixation layer parts, the fixation foil can in particular have a planar extension which is approximately equal to a flat extent of the carrier part or the carrier foil. Similar to the carrier film, the fixing film may have a plurality of recesses for improving the soundproofing properties.

The fixing film or the fixing strips can each be formed from the same material as the carrier film. For this purpose, a plastic material is preferably provided in each case.

The carrier part and the fixing layer can in particular be welded, glued, sewn, riveted or connected to each other in a similar manner.

As an alternative to a carrier film, the carrier part can be connected to one another by a plurality of the oscillating bodies Connecting elements, in particular in the form of threads, tapes, wires or the like may be formed. The connecting elements can in particular form a network, at the junctions of which vibrating bodies are arranged. This has the advantage that the material cost for the formation of the support member is very low, whereby a low weight of the support member can be achieved. It is also possible by adjusting the elasticity-determining properties of the individual connecting elements to set a different over the extension of the support member vibration behavior of the vibration body.

The vibration bodies may generally be designed in particular as annular, disc-shaped, spherical, cuboid, rod-shaped, tubular or shell-shaped components.

According to a further aspect of the invention, an insulation component for an aircraft or spacecraft is provided, having a first insulation layer and a sound absorption device arranged on a first surface of the first insulation layer according to one of the above. As a result of the arrangement of the carrier part applied to the first insulating layer, vibrations excited by sound waves are efficiently transmitted to the insulating layer and thus coupled into it. In particular, the insulating layer can thus act as an additional spring and / or damping element to the carrier part. This achieves a very good sound absorption effect in the low frequency range. Because the vibration bodies are fixed to the carrier part, no attachment of the same to the insulating layer must take place.

Furthermore, the insulation component may additionally have a first cover layer, which bears against the second surface of the first insulation layer opposite to the first surface, and which is connected to the support part of the sound absorption device. By the connection a particularly effective transmission and thus damping of the vibrations of the vibration body of the sound absorption device is achieved.

In particular, an edge region of the first cover layer may be connected to the carrier part, in particular to an edge region of the carrier part. The cover layer and the carrier part, if this is formed as a carrier film, can advantageously be made of the same material. Thus, the insulating layer between the support film and the cover layer can be wrapped.

It can preferably be provided that the insulation component has a second insulation layer, wherein the sound absorption device is arranged between the first insulation layer and a first surface of the second insulation layer. By the second insulating layer, an additional attenuation of the vibrations excited by sound waves of the vibration body of the sound absorption device is achieved. As a result, the sound-damping effect, in particular in the low-frequency range, is further improved.

The second insulation layer may in particular be constructed identically to the first insulation layer. In general, all features which are described for one of the insulation layers may also be present on the respective other insulation layer. For example, the insulating layers can each be designed as flat, in particular mat-shaped, components. A thickness of the insulating layers may be constant or different over the areal extent of the same. Also, the first insulating layer may have a thickness different from the thickness of the second insulating layer. By adjusting the thickness of the insulating layers whose spring or damping effect can be adjusted to the vibrations of the vibrating body. Thus, an adaptation of the insulation component to the frequency range of the noise to be damped can be done advantageously and with little effort.

The first and second insulating layers may generally have approximately the same thickness or a different thickness.

In this context, an approximately equal thickness of the insulation components can generally be understood in particular to mean that the thicknesses of the first insulation component and of the second insulation component in each cross section through the respective insulation component deviate from each other by a maximum of 15 percent.

In this context, a different thickness of the insulating components can generally be understood in particular to mean that the thicknesses of the first insulating component and of the second insulating component in each cross section through the respective insulating component deviate by more than 15 percent from one another.

For sound attenuation in a predetermined narrow frequency range of sound waves may preferably be provided an insulating member having a sound absorbing device with a plurality of vibrating bodies approximately the same mass and a first and a second insulating layer with approximately the same thickness. Advantageously, the first and the second insulating layer are formed here from the same material. To improve the soundproofing properties of the insulating component in a large Frequency range, the first and the second insulating layer may be formed of different materials, in particular of materials with different deformation properties.

Alternatively, it is also conceivable that the insulation component has a sound absorption device with a plurality of vibration bodies approximately the same mass and the first and the second insulation layer have different thicknesses. The materials of the first and second insulating layers may be identical or different from each other. By adapting the thicknesses of the insulation layers, the deformation and thus the sound damping properties of the respective insulation layer can be changed. In this way, a sound attenuation of sound waves in a large frequency range can be done advantageously by choosing different thicknesses of the insulation layers.

It can also be provided that the insulation component has a sound absorption device with a plurality of vibration bodies approximately the same mass and a first and a second insulating layer approximately the same thickness. Due to the different masses of the vibration body, a plurality of spring-damper systems is formed, which is particularly advantageous for sound absorption of sound waves in a large frequency range. In this case, it can furthermore be provided that the first insulation layer is formed from a material which is different from the material of the second insulation layer. In particular, the materials of the first and second insulating layers may have different deformation properties. Thus, the vibration behavior and thus the sound damping effect of the vibration masses can be further varied. If the first and the second insulating layer are formed from an identical material, a particularly simple construction of the insulating component results. Furthermore, in this case, the first and the second insulating layer may also have different thicknesses from each other.

Furthermore, it can be provided, in particular, that the insulation component has a second cover layer which bears against a second surface of the second insulation layer located opposite to the first surface. This can in particular be constructed identically to the first cover layer. Preferably, the second cover layer can be connected in an edge region to the edge region of the carrier part of the sound absorption device and / or to the edge region of the first cover layer.

Furthermore, it can be provided that the sound absorption device, in particular an edge region of the carrier part of the sound absorption device, projects beyond an edge of the first insulation layer. Thus, an edge region of the sound absorption device with the first cover layer and possibly the second cover layer, in particular with its edge region, form a projection section of the insulation component. The edge region of the sound absorption device can be formed by the edge region of the carrier part and / or optionally by the edge region of the fixing layer. The projection section projects beyond an edge of the first insulation layer and optionally also over an edge of the second insulation layer. Thus, the supernatant portion can be used for mounting the insulation component to a mounting structure. Thus, the insulation component is mounted in a very simple manner. For example, the insulation components can be prepared in a prefabricated manner and then attached to the attachment structure by means of a fastening device such as a bolt, a screw, a rivet or the like. In particular, the sound absorbing device may already be included in the insulating member and need not be separately attached to the fuselage structure of the or the mounting structure of the aircraft or spacecraft.

The first cover layer and the carrier part of the sound absorption device can be welded, glued, sewn or riveted, in particular in their respective edge regions. Alternatively or additionally, it can be provided that the respective edge regions are provided by a fastening device extending through the edge region of the carrier part of the sound absorption device and through the edge region of the first cover layer, which is provided for fastening the insulation component to a fastening structure, in particular a fuselage structure of an aircraft , are interconnected.

The insulating layer, in particular the first and / or the second insulating layer, may in particular be formed from an open-pore or a closed-pored material. In particular, open-pore materials have very good sound insulation properties. In particular, mineral wool may be provided as an open-pored material. Here, preferably glass wool can be used. Also, a foam material as an open-pore material is conceivable. By virtue of the sound absorption device applied to the first insulation layer and optionally to the second insulation layer, it is also possible to use closed-pore materials, in particular closed-cell foams, advantageously as the material for the insulation layers. This is particularly advantageous in applications in which open-cell materials can not be used.

The first insulating layer and the second insulating layer may be generally formed of an identical material. Also, the first insulating layer may be formed of a material different from the material of the second insulating layer.

The term "limp" is generally understood herein to mean the property of a component or structure, after which the component or structure undergoes deflection due to its own weight at a point-shaped bearing in its center of gravity.

By "low-frequency", "low-frequency", "low-frequency range", "low-frequency range" or "low-frequency range" is meant herein frequencies, in particular of sound waves, of less than or equal to 600 hertz and preferably of less than or equal to 500 hertz.

In the following the invention will be explained with reference to the figures of the drawings. From the figures show:

1 a sectional view of an insulating member according to a preferred embodiment of the present invention;

2 a schematic representation of a sound absorption device according to an embodiment of the present invention in a perspective view;

3 a schematic representation of a sound absorption device according to another embodiment of the present invention in a perspective view;

4 a sectional view of the in the 2 and 3 shown embodiments, each in a section along in the 2 and 3 each drawn line AA results;

5 a schematic representation of a sound absorption device according to another embodiment of the present invention in a perspective view;

6 a schematic representation of an insulating component according to an embodiment of the present invention in a sectional view;

7 a schematic representation of an insulating member according to another embodiment of the present invention in a sectional view;

8th a schematic representation of an insulating component according to another embodiment of the present invention in a sectional view;

9 a schematic representation of an embodiment of a vibration mass of the sound insulation device in a perspective view;

10 a schematic representation of another embodiment of the vibration mass of the sound insulation device in a perspective view;

11 a schematic representation of another embodiment of the vibration mass of the sound insulation device in a perspective view;

12 a schematic representation of another embodiment of the vibration mass of the sound insulation device in a perspective view;

13 a schematic representation of another embodiment of the vibration mass of the sound insulation device in a perspective view;

14 a schematic representation of another embodiment of the vibration mass of the sound insulation device in a perspective view; and

15 a schematic representation of another embodiment of the vibration mass of the sound insulation device in a perspective view.

In the figures, the same reference numerals designate the same or functionally identical components, unless indicated otherwise.

1 shows a sectional view of an insulating component 10 according to a preferred embodiment of the present invention. The insulation component 10 is particularly intended for use in an air or spacecraft and may be advantageous to a fuselage structure 100 the aircraft or spacecraft arranged in particular be attached to this. For example, the hull structure 100 a fastening structure 101 , z. B. in the form of so-called frames, or these form, to which the insulation component 10 is fastened.

The insulation component 10 has at least a first insulation layer 11 and optionally, in addition to this, a second insulation layer 12 exhibit. The insulation component 10 in particular has a sound absorption device 1 on which as in 1 is shown, for example between the first and the second insulating layer 11 . 12 can be arranged.

The 2 to 5 show a sound absorption device 1 for an aircraft or spacecraft, in particular a sound absorption device 1 for the insulation component 10 ,

The sound absorption device 1 has a support part 2 and a variety of with the carrier part 2 connected vibration masses or vibration bodies 3 on. The vibration bodies 3 are over an arrangement area 7 arranged distributed.

The arrangement area 7 can, as in the 2 . 3 and 7 shown as one of an outline line 7A limited area to be defined, with the outline line 7A so runs that all vibration masses 3 with a minimum surface area of the area within the boundary line 7A arranged are the carrier part 2 has one on the placement surface 7 related mass, which is less than one on the vibrating bodies 3 on the arrangement surface 7 assumed projection surface related mass of the vibration body 3 is.

In this way, the vibrating body 3 be excited by sound waves to vibrate. In particular, the energy of the sound waves is applied to the vibrating bodies 3 transfer. Preferably, the carrier part 2 be designed elastically deformable. In this way, forms the support part 2 a spring-damper system for the vibration body 3 from, which causes an efficient sound insulation in particular in the low-frequency range. In particular, by the carrier part 2 a separate arrangement structure for the vibration body 3 created. This has the advantage that the sound absorption device 3 can be used advantageously in a variety of installation situations. For example, this can be done directly on a fuselage structure, which is advantageous in terms of a combination with different insulation layers. Also, the vibration body 3 thereby advantageously combined with a plurality of different insulating layers in a simple manner.

The variety of vibrational bodies 3 may have a total mass that is greater than a mass of the support member 2 is.

The carrier part 2 and the vibrating bodies 3 are preferred as separate components 2 executed. In particular, the carrier part 2 and the vibrational masses 3 be formed of different materials, wherein the carrier part 2 in particular of a lightweight material, such. As a plastic, and the vibration masses in particular from a heavy material such. As a metal material or a ceramic may be formed. In particular, it can be provided that the carrier part 2 and the vibrational masses 3 have different densities in the mutually fixed state. The carrier part 2 and the vibrational masses 3 However, also one-piece, z. B. in material unit, be formed. In this case, the vibration masses 3 be formed for example by local material accumulations.

As in 2 is shown schematically, the carrier part 2 through a carrier foil 21 be educated. The carrier foil 21 may be formed in particular from an elastically deformable and preferably limp material. Furthermore, the carrier film 21 in particular have a planar extension, as in the 2 and 3 is shown. The use of a flat extending carrier film 21 as a carrier part 2 has the advantage that this at the same time as a cover layer for the insulation layer of the later described in detail insulation component 10 can be used. The carrier foil 21 can optionally have a variety of recesses 8th exhibit. This has the advantage that the sound waves through the recesses 8th be broken and partially reflected, whereby the sound-absorbing effect of the sound absorption device 1 is further improved. The carrier foil 21 may in particular also have a strip-like shape (not shown).

The vibration bodies 3 can, as exemplified in the 2 to 4 is shown between a first surface 2a the carrier part 2 and a fixation layer 4 be arranged. In particular, the vibration bodies 3 with respect to a device thickness direction T1 of the sound absorption device 1 between the carrier part 2 and the fixation layer 4 arranged, in particular in 4 is shown. This is the fixation layer 4 with a first surface 4a at the first surface 2a the carrier part 2 and is in particular associated with this. This will cause the vibrating bodies 3 on the carrier film 3 fixed or optionally additionally fixed. For example, it can also be provided that the vibration bodies 3 on the carrier film 21 glued, molded or molded or poured or injected into these. Also, the vibration body 3 already at the fixation layer 4 attached, for example, glued to this, molded or molded or poured or injected into this, and this together with the carrier film 21 get connected. This results in a particularly simple production process.

The fixation layer 4 can, as exemplified in 2 is shown by several Fixing layer parts 41 , in particular in the form of fixation layer strips, be formed, wherein between each one fixation layer part 41 and the carrier part 2 at least one vibrating body 3 is arranged. Instead of fixation strips, as in 2 shown, the fixation layer parts 41 also present as rectangular, triangular, circular or similar shaped parts. The design of the fixation layer 4 as several separate fixation layer parts 41 has the advantage that only in areas of the support part 2 in which also actually vibration body 3 arranged are a fixing layer 2 is arranged. Thus, the material cost for the formation of the fixing layer is reduced, resulting in cost and weight savings.

Alternatively to the training by different fixation layer parts 41 , the fixation layer can 4 also by a fixing film 42 be formed as exemplified in 3 is shown. The fixation foil 42 may for example be formed of the same material as the carrier film 21 , Furthermore, the fixing film 42 , as in 3 is shown, on the carrier film 21 be arranged that an edge 43 the fixing film 42 spaced to the edge 23 the carrier film 21 is arranged. However, it can also be provided that the edge 23 the carrier film 21 and the edge 43 the fixing film 42 in a plan view of the first surface 2a the carrier part 2 which is a first surface 21a support film 21 forms, at least partially approximately congruent.

As in 3 Furthermore, it can be provided that the fixing film 42 a variety of recesses 9 can have. At the recesses 9 Sound waves can be broken and partially reflected, reducing the sound absorption of the sound absorption device 1 is further improved.

The carrier part 2 and the fixation layer 4 can in particular be welded, glued, sewn or riveted. Especially with a carrier film 21 trained carrier part 2 can fixation film 2 with the carrier foil 21 for example, by an adhesive, in particular a thermally activatable adhesive, which acts as an activatable layer on the first surface 2a the carrier part 2 and the first surface 4a the fixation layer 4 is applied, be connected.

As in 5 is shown as an example, the support member 2 also by a variety of the vibration bodies 3 interconnecting fasteners 22 be formed. For example, the fasteners 22 be formed by threads, tapes, wires or the like. The connecting elements 22 are at opposite end portions 22A . 22B each with a vibrating body 3 or another connecting element 22 connected, for example, knotted with this, sewn, welded, glued, riveted or the like. In this way, a particularly material-saving and thus easy configuration of the support member 2 achieved.

In the 2 to 5 are exemplary matrix-like arrangements of the vibrating body 3 on the support part 2 shown. Alternatively, the vibrating body 3 also irregular over the carrier part 2 be distributed. Furthermore, concentric arrangements of the vibrating body 3 or similar arrangements conceivable.

The 9 to 15 show exemplarily different possible designs of the vibrating body 3 , 9 shows one as an annular, 10 one as a spherical, 11 one as a cuboid, the 12 and 13 one as disc-shaped, 14 one as a rod-shaped and 15 a trained as a tubular component vibration body 3 , In addition to other possible embodiments of the vibration body, not shown 3 In particular, a cup-shaped design is conceivable.

6 shows an example and schematically another embodiment of the insulating component 10 for an aircraft or spacecraft with a first insulation layer 11 and the one described above on a first surface 11a the first insulation layer 11 adjacent arranged sound absorption device 1 , At the in 6 The embodiment shown is the carrier part 2 by way of example as a carrier film 21 executed. As in 6 is shown, it can be provided that the carrier part 2 with one opposite to the first surface 2a oriented second surface 2 B at the first surface 11a the first insulation layer 11 is applied. However, it is also conceivable that the carrier part 2 with the vibrating bodies 3 and optionally in addition to the first surface 2a or with one opposite the first surface 4a oriented second surface 4b the fixation layer 4 at the first surface 11a the first insulation layer 11 is applied.

The at the first surface 11a the first insulation layer 11 adjacent arrangement of the support member 2 has the advantage that the vibrations excited by sound waves efficiently to the insulation layer 11 be transferred and thus coupled into this. In particular, the insulation layer 11 so as to the carrier part 2 additional spring and / or damper element act. This achieves a very good sound absorption effect in the low frequency range. Because of the vibration body 3 on the support part 2 are fixed, must no attachment of the same to the insulation layer 11 respectively. This has the advantage that the insulation layer 3 does not have to be changed.

As in the 6 and 7 is shown as an example, the insulating component 10 additionally a first cover layer 13 exhibit. The first cover layer 13 is located opposite to the first surface 11a located second surface 11b the first insulation layer 11 at. In particular, the first cover layer 13 , preferably in a border area 15 same, with the carrier part 2 the sound absorption device 1 be connected. In this way, the first insulation layer 11 between the first cover layer 13 and the carrier part 2 be packed. For example, this can be tight concerns the sound absorption device 1 at the first insulation layer 11 be achieved, whereby a particularly efficient damping of the vibration of the vibration body 3 through the first insulation layer 11 he follows. This is particularly advantageous realized when the carrier part 2 as a carrier film 21 is trained. The first cover layer 13 may in particular be formed as a plastic film and is preferably formed from the same material as the carrier film 21 , This can be achieved by the cover layer 13 and the carrier film 21 a particular moisture-proof packaging of the first insulating layer 11 respectively.

As in particular in 6 Shown is the first cover layer 15 especially in its edge area 15 with a border area 25 the carrier part 2 be connected. This is in particular for the formation of a supernatant section which will be described later 19 of the insulation component 1 advantageous.

As in the 1 . 7 and 8th is shown, may be provided in particular that the insulation component 10 in addition to the first insulation layer 11 a second insulation layer 12 having. The advantage here is the sound absorption device 1 between the first insulation layer 11 and a first surface 12a the second insulation layer 12 arranged. In particular, the sound absorption device 1 with respect to a thickness direction T11 of the first insulating layer 11 and with respect to a thickness direction T12 of the second insulating layer 12 arranged between these. Particularly preferred is the sound absorption device 1 at the first surface 12a the second insulation layer 12 on, for. B. with one of the first or the second surface 2a . 2 B the carrier part and / or with the vibration bodies 3 or with the second surface 4b the fixation layer 4 at the first surface 12a the second insulation layer 12 at.

By the arrangement between two insulation layers 11 . 12 can be excited by sound waves oscillations of the vibrating body 3 in a very efficient way both in the first and the second insulation layer 11 . 12 coupled and thus very well muted.

As in particular in 7 is shown, it can be provided that the insulation component 10 one at one opposite the first surface 12a located or oriented second surface 12b the second insulation layer 12 fitting second cover layer 14 having. The second cover layer 14 may in particular be identical to the first cover layer 13 be constructed. Particularly advantageous may be provided that the second cover layer 14 in a border area 16 same with the border area 25 the carrier part 2 the sound absorption device 1 or alternatively or in addition to this with the edge region 15 the first cover layer 13 connected is.

As in particular in the 1 . 6 and 7 is shown can be advantageously provided that the edge region 25 the carrier part 2 the sound absorption device 1 or the sound absorption device 1 in total, including the optional fixation layer 4 over a border 17 the first insulation layer 11 survives. This will, as in the 1 . 6 and 7 is shown schematically, a supernatant section 19 formed of the insulating component, for easy and efficient attachment of the insulation component 1 at the attachment structure 101 can be used. Advantageous is the sound absorption device 1 also over a border 18 the second insulation layer 12 above.

As example and schematically in the 1 and 7 is shown, the supernatant section 19 by means of a fastening device 50 which extends through the supernatant section 19 through, in particular through the first cover layer 13 , optionally also by the carrier part 2 and / or the fixation layer 4 the sound absorption device 1 and optionally also optionally by the second cover layer 14 through, extends to the attachment structure 101 be attached. In particular, the sound absorption device 1 in this way directly or via the cover sheet 13 indirectly to the attachment structure 101 be coupled. This can, for. B. by setting a corresponding bias of the support member 2 between the individual vibrating bodies 3 , the vibration behavior of the vibration body 3 on the support part 2 and thus the sound absorption properties are adjusted. Furthermore, an easily mountable mounting solution for the sound absorption device 1 at the insulation layers 11 . 12 as well as on the attachment structure 101 created.

The the edge area 15 the first cover layer 13 and the border area 25 the carrier part 2 the sound absorption device 1 and optionally the border area 16 the second cover layer 14 may in particular be welded, glued, sewn, riveted or the like. In an insulation component 1 with a first and a second insulation layer 11 . 12 and a first and a second cover layer 13 . 14 It may be advantageous if the carrier part 2 the sound absorption device 1 as a carrier film 21 is formed, which at the first surface 21a and at an opposite to this oriented second surface 21b , at least in the edge regions thereof, is coated with an adhesive layer. This ensures easy manufacturability of the insulation component.

Alternatively to the aforementioned connection possibilities of the first cover layer 13 and the border area 25 the carrier part 2 and optionally the edge area 16 the second cover layer 14 These can be accessed through the edge area 25 the carrier part 2 and through the edge area 15 the first cover layer 13 and possibly by edge area 16 the second cover layer 14 extending through fastener 50 be connected. The fastening device 50 can in particular for fastening the insulation component 10 on a mounting structure 101 , in particular a fuselage structure of an aircraft or spacecraft, provided and, for example, by a screw, a rivet, a bolt or the like may be formed.

As in 8th is shown schematically, it can also be provided that the first insulating layer 11 , the optional second insulation layer 12 and the sound absorbing device disposed between them 1 by fasteners 50 passing through the insulation layer 11 , the optional second insulation layer 12 and the sound absorption device 1 extend therethrough fixed relative to each other or are connected by these. At the same time, the fastening device 50 for fastening the insulation component to the fastening structure 101 be provided.

The first insulation layer 11 as well as the optional second insulation layer 12 may generally be formed from an open-pore material. The insulating layers are preferred 11 . 12 from a mineral wool, particularly preferably from glass wool, or formed from a foam material.

Although the present invention has been exemplified above by means of embodiments, it is not limited thereto, but modifiable in many ways. In particular, combinations of the preceding embodiments are conceivable.

LIST OF REFERENCE NUMBERS

1

Sound absorption device

2

support part

2a

first surface of the carrier part

2 B

second surface of the carrier part

3

vibrating body

4

fixing layer

4a

first surface of the fixation layer

4b

second surface of the fixation layer

7

disposing area

7A

Umrandungslnie

8th

recesses

9

recesses

10

insulating member

11

first insulation layer

11a

first surface of the first insulation layer

11b

second surface of the first insulation layer

12

second insulation layer

12a

first surface of the second insulation layer

12b

second surface of the second insulation layer

13

first cover layer

14

second cover layer

15

Edge region of the first cover layer

16

Edge region of the second cover layer

17

Edge of the first insulation layer

18

Edge of the second insulation layer

19

Projection section of the insulating component

21

support film

21a

first surface carrier film 21

22

fasteners

22A, 22B

End portions of the connecting elements

23

Edge of the carrier film

25

Edge region of the carrier part

41

Fixing layer parts

42

fixation film

43

Edge of the fixing foil

50

fastening device

101

attachment structure

T1

Component thickness direction of the sound absorption device

T11

Thickness direction of the first insulation layer

T12

Thickness direction of the second insulation layer

QUOTES INCLUDE IN THE DESCRIPTION

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Cited patent literature

• DE 102008017357 A1 [0003]
• DE 102009032497 A1 [0004]

Claims (15)

Sound absorption device ( 1 ) for an aircraft or spacecraft, with a support ( 2 ); and a plurality of vibrating bodies ( 3 ), which have an arrangement surface ( 7 ) and arranged with the carrier part ( 2 ) are connected; the support part ( 2 ) one on the arrangement surface ( 7 ), which is less than one on the vibrating bodies ( 3 ) on the placement surface ( 7 ) assumed assumed mass of the vibration body ( 3 ). Sound absorption device ( 1 ) according to claim 1, characterized in that the carrier part ( 2 ) by a carrier foil ( 21 ), which preferably has a multiplicity of recesses ( 8th ) having. Sound absorption device ( 1 ) according to claim 1 or 2, characterized in that the vibration bodies ( 3 ) between a first surface ( 2a ) of the carrier part ( 2 ) and a fixation layer ( 4 ), which with a first surface ( 4a ) with the first surface ( 2a ) of the carrier part ( 2 ) is arranged. Sound absorption device ( 1 ) according to claim 3, characterized in that the fixing layer ( 4 ) by a plurality of fixation layer parts ( 41 ), in particular in the form of fixation layer strips, wherein between each one fixation layer part ( 41 ) and the carrier part ( 2 ) at least one vibrating body ( 3 ) is arranged. Sound absorption device ( 1 ) according to claim 3, characterized in that the fixing layer ( 4 ) by a fixing film ( 42 ) is formed, which preferably a plurality of recesses ( 9 ) having. Sound absorption device ( 1 ) according to one of claims 3 to 5, characterized in that the carrier part ( 2 ) and the fixation layer ( 4 ) are welded, glued, sewn or riveted. Sound absorption device ( 1 ) according to claim 1, characterized in that the carrier part ( 2 ) by a plurality of the vibrating bodies ( 3 ) interconnecting fasteners ( 22 ), in particular in the form of threads, tapes, wires or the like, is formed. Sound absorption device ( 1 ) according to one of the preceding claims, characterized in that the vibration bodies ( 3 ) are formed as annular, disc-shaped, spherical, cuboid, rod-shaped, tubular or shell-shaped components. Insulation component ( 10 ) for an aircraft or spacecraft, having a first insulation layer ( 11 ); and one at a first surface ( 11a ) of the first insulation layer ( 11 ) adjoining sound absorption device ( 1 ) according to any one of the preceding claims. Insulation component ( 10 ) according to claim 9, characterized in that the insulating component ( 10 ) additionally at one opposite to the first surface ( 11a ) located second surface ( 11b ) of the first insulation layer ( 11 ) adjacent first cover layer ( 13 ), which with the carrier part ( 2 ) of the sound absorption device ( 1 ) connected is. Insulation component ( 10 ) according to claim 9 or 10, characterized in that the insulating component ( 10 ) a second insulation layer ( 12 ), wherein the sound absorption device ( 1 ) between the first insulation layer ( 11 ) and a first surface ( 12a ) of the second insulation layer ( 12 ) is arranged. Insulating component according to claim 11, characterized in that the insulating component ( 10 ) one at one opposite the first surface ( 12a ) located second surface ( 12b ) of the second insulation layer ( 12 ) adjacent second cover layer ( 14 ) having. Insulation component ( 10 ) according to one of claims 9 to 12, characterized in that the sound absorption device ( 1 ), in particular a border area ( 25 ) of the carrier part ( 2 ) of the sound absorption device ( 1 ), over a border ( 17 ) of the first insulation layer ( 11 ) survives. Insulating component according to one of Claims 9 to 13, characterized in that the first covering layer ( 13 ) and the carrier part ( 2 ) of the sound absorption device ( 1 ) in their respective peripheral areas ( 15 ; 25 ) are welded together, glued, sewn or riveted or by a through the edge region ( 25 ) of the carrier part ( 2 ) of the sound absorption device ( 1 ) and the edge area ( 15 ) of the first cover layer ( 13 ) extending fastening device ( 50 ), which for attachment of the insulating component ( 10 ) on a fastening structure ( 101 ), in particular a fuselage structure of an aircraft, is connected to each other. Insulating component according to one of Claims 9 to 14, characterized in that the insulating layer ( 11 ; 12 ) from an open-pored Material, preferably from a mineral wool, particularly preferably from glass wool, or from an open-cell foam material, or from a closed-cell material, in particular from a closed-cell foam material is formed.

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