CN219143790U - Damping vibration attenuation composite steel plate and vibration attenuation noise reduction sound insulation structure - Google Patents
Damping vibration attenuation composite steel plate and vibration attenuation noise reduction sound insulation structure Download PDFInfo
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- CN219143790U CN219143790U CN202223167558.8U CN202223167558U CN219143790U CN 219143790 U CN219143790 U CN 219143790U CN 202223167558 U CN202223167558 U CN 202223167558U CN 219143790 U CN219143790 U CN 219143790U
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Abstract
The utility model provides a damping vibration attenuation composite steel plate and a vibration attenuation noise reduction sound insulation structure comprising the damping vibration attenuation composite steel plate. The damping vibration attenuation composite steel plate of the present utility model comprises: a steel plate unit including two steel plates that are attached to each other and serve as an outer steel plate and an inner steel plate, respectively, and an adhesive layer for adhering the two steel plates together; and a viscoelastic damping layer covering a side of the inner steel plate away from the outer steel plate. Damping noise reduction sound insulation structure includes: damping vibration attenuation composite steel plate; and the metal perforated sound absorbing plate is positioned on the inner side of the damping vibration attenuation composite steel plate and is arranged at intervals with the damping vibration attenuation composite steel plate, wherein a sound absorbing air cavity is formed in a space between the metal perforated sound absorbing plate and the damping vibration attenuation composite steel plate. This vibration damping noise reduction sound insulation structure still includes: and the sound absorption non-woven fabric layer is covered on the side surface of the metal perforated sound absorption plate, which faces the damping vibration attenuation composite steel plate.
Description
Technical Field
The utility model belongs to the technical field of vibration and noise reduction, and particularly relates to a damping vibration reduction composite steel plate and a vibration reduction and noise insulation structure comprising the damping vibration reduction composite steel plate.
Background
Large noise devices such as cigarette packing machines not only produce large vibrations during operation, but also radiate a large amount of noise. In order to prevent noise from leaking and spreading, a sound insulation cover is generally assembled to the apparatus to effectively prevent damage caused by noise.
In the prior art, a sound-proof cover comprises a supporting framework fixedly arranged on equipment and a sound-proof plate arranged on the supporting framework, wherein the sound-proof plate is usually made of a single-layer thick steel plate or composite steel plates formed by compounding a plurality of layers of thin steel plates. However, although the sound insulation board has a certain sound insulation effect, the vibration reduction effect is not obvious, and resonance is extremely easy to generate so as to excite secondary noise.
Disclosure of Invention
The utility model aims to solve the technical problems, and aims to provide a damping vibration reduction composite steel plate with good vibration reduction effect and a vibration reduction and noise insulation structure comprising the damping vibration reduction composite steel plate.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
< protocol one >
The utility model provides a damping vibration attenuation composite steel plate, which has the characteristics that: a steel plate unit including two steel plates that are attached to each other and serve as an outer steel plate and an inner steel plate, respectively, and an adhesive layer for adhering the two steel plates together; and a viscoelastic damping layer covering a side of the inner steel plate away from the outer steel plate.
The damping vibration attenuation clad steel plate provided by the utility model can also have the following characteristics: wherein the steel plate is any one of a stainless steel plate and a common carbon steel plate, and the thickness of the steel plate is 0.5-1.5mm.
The damping vibration attenuation clad steel plate provided by the utility model can also have the following characteristics: wherein the adhesive layer is a polymer resin layer with a thickness of 70-80 μm.
The damping vibration attenuation clad steel plate provided by the utility model can also have the following characteristics: the viscoelastic damping layer is a damping rubber sheet, and the thickness of the damping rubber sheet is 2.5-3.5mm.
< protocol two >
The utility model also provides a vibration damping, noise reducing and sound insulating structure, which has the characteristics that: damping vibration attenuation composite steel plate according to the first aspect; and the metal perforated sound absorbing plate is positioned on the inner side of the damping vibration attenuation composite steel plate and is arranged at intervals with the damping vibration attenuation composite steel plate, wherein a sound absorbing air cavity is formed in a space between the metal perforated sound absorbing plate and the damping vibration attenuation composite steel plate.
In the vibration damping, noise reducing and sound insulating structure provided by the utility model, the structure can also have the following characteristics: wherein, the distance between the metal perforated sound absorbing plate and the damping vibration attenuation composite steel plate is 45-55mm.
In the vibration damping, noise reducing and sound insulating structure provided by the utility model, the structure can also have the following characteristics: wherein the metal perforated sound absorbing plate is an aluminum alloy perforated plate with the thickness of 0.5-1.5mm.
In the vibration damping, noise reducing and sound insulating structure provided by the utility model, the structure can also have the following characteristics: wherein the aperture of the perforation on the aluminum alloy perforated plate is 2.5-3.5mm, and the perforation rate is 15-25%.
In the vibration damping, noise reducing and sound insulating structure provided by the utility model, the structure can also have the following characteristics: further comprises: and the sound absorption non-woven fabric layer is covered on the side surface of the metal perforated sound absorption plate, which faces the damping vibration attenuation composite steel plate.
In the vibration damping, noise reducing and sound insulating structure provided by the utility model, the structure can also have the following characteristics: wherein the sound absorption non-woven fabric layer consists of two layers of sound absorption non-woven fabrics, and the surface density of each layer of sound absorption non-woven fabric is 62g/m 2 The thickness was 0.22mm.
Effects and effects of the utility model
According to the damping vibration reduction composite steel plate and the vibration reduction and noise insulation structure comprising the damping vibration reduction steel plate, as the outer steel plate and the inner steel plate are mutually adhered and bonded together by the adhesive layer, the viscoelastic damping layer covers the side surface of the inner steel plate far away from the outer steel plate, and vibration energy can be effectively decomposed through the frequency variation characteristic of the damping characteristic of the viscoelastic material, so that the composite steel plate has a good vibration reduction effect.
Drawings
FIG. 1 is a schematic perspective view of a damping vibration attenuation clad steel plate in accordance with an embodiment of the present utility model;
FIG. 2 is a schematic cross-sectional view of a damping vibration-damping junction clad steel plate in accordance with an embodiment of the present utility model;
FIG. 3 is a plot of the frequency response of a damped vibration damping clad steel plate in an embodiment of the present utility model;
FIG. 4 is a plot of the frequency response of a 2mm thick single layer stainless steel plate;
fig. 5 is a schematic perspective view of a vibration damping, noise reducing and sound insulating structure in a modification of the present utility model;
FIG. 6 is a schematic cross-sectional view of a vibration damping, noise reducing and sound insulating structure in a modification of the present utility model; and
fig. 7 is a diagram showing the sound absorption effect of the vibration damping, noise reducing, and sound insulating structure according to the modification of the present utility model.
Detailed Description
The conception, specific structure, and technical effects of the present utility model will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present utility model.
< example >
FIG. 1 is a schematic perspective view of a damping vibration attenuation clad steel plate in accordance with an embodiment of the present utility model; fig. 2 is a schematic cross-sectional view of a damping vibration attenuation clad steel plate in accordance with an embodiment of the present utility model. In fig. 2, the display width of the adhesive layer is enlarged for convenience of explanation of the structural hierarchy.
As shown in fig. 1 and 2, in the present embodiment, a damping vibration attenuation composite steel plate 100 is mounted on a support skeleton, and the damping vibration attenuation composite steel plate 100 and the support skeleton together constitute a sound insulation device for insulating noise sources. The damping vibration attenuation composite steel sheet 100 includes a steel sheet unit 10 and a viscoelastic damping layer 20.
As shown in fig. 1 and 2, the steel sheet unit includes an outer steel sheet 11 and an inner steel sheet 12 bonded to each other, and an adhesive layer 13. In use, the outer steel plate 11 is remote from the noise source and the inner steel plate 12 is directed towards the noise source.
The outer steel plate 11 and the inner steel plate 12 are respectively made of any one of stainless steel plates and ordinary carbon steel plates; the thickness of the outer steel plate 11 and the inner steel plate 12 is between 0.5 and 1.5mm. In the present embodiment, the outer steel plate 11 and the inner steel plate 12 are each stainless steel plates having a thickness of 1 mm.
An adhesive layer 13 is provided between the inner side surface of the outer steel plate 11 and the outer side surface of the inner steel plate 12 for adhering the outer steel plate 11 and the inner steel plate 12 together. The adhesive layer 13 is a polymer resin layer having a thickness of 70-80 μm, and in this embodiment, the adhesive layer 13 is a phenolic resin neoprene layer having a thickness of 75 μm.
As shown in fig. 1 and 2, the viscoelastic damping layer 20 covers the inner side surface of the inner steel plate 12 (i.e., the side surface away from the outer steel plate 11). The viscoelastic damping layer 20 adopts a damping rubber sheet with the thickness of 2.5-3.5 mm; in this example, the viscoelastic damping layer 20 used a damping reinforcement sheet with a thickness of 3mm manufactured by priz aerospace precision equipment limited, which has an adhesive on one side.
In this example, test standard GB/T19889.3-2005 Acoustic building and construction element Sound insulation measurement part 3: laboratory measurement of air sound insulation of building components the sound insulation index and the average sound insulation amount of the damping vibration attenuation composite steel plate and the 2mm thick single-layer stainless steel plate of the embodiment are tested, and the test results are as follows: sound insulation index R of damping vibration attenuation composite steel plate of embodiment W =35 dB, the average sound insulation is 32dB; sound insulation index R of 2mm thick single-layer stainless steel plate W =33 dB, the average sound insulation is 30.1dB.
In this example, the vibration properties of the damping vibration-damping composite steel sheet and the 2mm thick single-layer stainless steel sheet of this example were also tested using CSN49 0124-1980 resonance measurement of elastic coefficient and vibration log attenuation, and the test results are shown in FIGS. 3 and 4. As shown in fig. 3 and 4, it can be clearly observed that the 2mm thick single-layer stainless steel plate has no vibration damping effect, but also has vibration amplifying effect; the damping vibration attenuation composite steel plate has good vibration attenuation effect, so that secondary noise caused by vibration of the composite steel plate is reduced. Wherein, the vibration of the single-layer stainless steel plate with the thickness of 2mm is amplified by 1.49-6.13 times, and the vibration reduction efficiency of the damping vibration reduction composite steel plate of the embodiment reaches 49.2-94.9%.
Effects and effects of the examples
According to the damping vibration reduction composite steel plate and the vibration reduction and noise insulation structure comprising the damping vibration reduction steel plate, as the outer steel plate and the inner steel plate are mutually adhered and bonded together by the adhesive layer, the viscoelastic damping layer covers the side surface of the inner steel plate far away from the outer steel plate, and vibration energy can be effectively decomposed through the frequency variation characteristic of the damping characteristic of the viscoelastic material, so that the composite steel plate has a good vibration reduction effect.
In addition, because the viscoelastic damping layer adopts damping rubber sheets, the viscoelastic damping layer is easy to purchase from the market and has low processing cost.
< modification >
The present modification is a further modification of the embodiment, and the same constituent elements as those in the embodiment are given the same reference numerals, and the same description is omitted.
Fig. 5 is a schematic perspective view of a vibration damping, noise reducing and sound insulating structure in a modification of the present utility model; fig. 6 is a schematic cross-sectional view of a vibration damping, noise reducing and sound insulating structure in a modification of the present utility model. In fig. 6, the display widths of the adhesive layer and the sound absorbing nonwoven layer are enlarged for convenience of explanation of the structural hierarchy.
As shown in fig. 5 and 6, in this modification, the vibration/noise reduction and insulation structure 200 is mounted on a support frame, and the vibration/noise reduction and insulation structure 200 and the support frame together constitute an insulation device for insulating noise sources. The vibration damping noise reduction and insulation structure 200 comprises a damping vibration damping composite steel plate 100, a metal perforated sound absorption plate 230 and a sound absorption non-woven fabric layer 240.
As shown in fig. 5 and 6, the metal perforated sound absorbing plate 230 is located at the inner side of the damping vibration attenuation composite steel plate 100 (i.e., disposed corresponding to the viscoelastic damping layer 20) and is spaced apart from the damping vibration attenuation composite steel plate 100 such that the space between the metal perforated sound absorbing plate 230 and the damping vibration attenuation composite steel plate 100 forms a sound absorbing air chamber 200a. The distance between the metal perforated sound absorbing plate 230 and the damping vibration attenuation composite steel plate 100 is 45-55mm, and in this modification, the distance between the metal perforated sound absorbing plate 230 and the damping vibration attenuation composite steel plate 100 is 50mm.
The perforated metal acoustic panel 230 employs an aluminum alloy perforated panel having a thickness of between 0.5 and 1.5mm, a perforated aperture of between 2.5 and 3.5mm, and a perforation rate of between 15 and 25%. In the present modification, an aluminum alloy perforated plate having a thickness of 1mm, a perforated hole diameter of 3mm, and a perforation ratio of 12% was used as the metal perforated sound absorbing plate 230.
As shown in fig. 6, the sound absorbing nonwoven fabric layer 240 is coated on the outer side surface (i.e., the side surface facing the damping composite steel plate 100) of the metal perforated sound absorbing sheet 230. In the present modification, the sound-absorbing nonwoven fabric layer 240 is two layers of sound-absorbing nonwoven fabrics of sound-absorbing nonwoven fabric C1986SP, each of which has a thickness of 0.22mm and an areal density of 62g/m 2 . In this embodiment, the sound-absorbing nonwoven fabric is tightly adhered to the perforated plate by using an adhesive and adopting a heating and pressurizing process, and the process is the prior art and will not be described herein.
In the modification, the sound absorption coefficient of the vibration damping, noise reducing and sound insulating structure of the modification is tested by adopting a test standard GBJ47-83 Specification for measuring sound absorption coefficient of reverberation room method, and the test result is shown in FIG. 7. Test results show that the vibration damping, noise reducing and sound insulating structure of the modification has good sound absorbing effect, and particularly the attraction coefficient in the range of 1250-3150Hz frequency range is maintained above 0.86.
In this modification, in addition to the effects and actions of the embodiments, the metal perforated sound absorbing plate is disposed at intervals with the damping vibration attenuation composite steel plate, and the space between the metal perforated sound absorbing plate and the damping vibration attenuation composite steel plate forms a sound absorbing air cavity, so that the sound absorption coefficient of the sound insulation structure can be effectively improved, and the sound absorption performance can be improved.
Further, the sound-absorbing non-woven fabric layer covered on the side surface of the metal perforated sound-absorbing plate facing the damping vibration attenuation composite steel plate is further arranged, so that the sound-insulating quantity of the sound-insulating structure is further improved. In addition, the weight of the sound absorption non-woven fabric is reduced by 97% compared with the weight of the glass wool sound absorption material in the prior art under the same noise reduction coefficient.
The above embodiments are preferred examples of the present utility model, and are not intended to limit the scope of the present utility model.
Claims (10)
1. A damping vibration attenuation clad steel plate, comprising:
a steel plate unit including two steel plates that are attached to each other and serve as an outer steel plate and an inner steel plate, respectively, and an adhesive layer for adhering the two steel plates together; and
and the viscoelastic damping layer is covered on the side surface of the inner steel plate, which is far away from the outer steel plate.
2. The damping vibration attenuation clad steel plate according to claim 1, wherein:
wherein the steel plate is any one of a stainless steel plate and a common carbon steel plate,
the thickness of the steel plate is 0.5-1.5mm.
3. The damping vibration attenuation clad steel plate according to claim 1, wherein:
wherein the bonding layer is a polymer resin layer, and the thickness of the polymer resin layer is 70-80 mu m.
4. The damping vibration attenuation clad steel plate according to claim 1, wherein:
wherein the viscoelastic damping layer is a damping rubber sheet, and the thickness of the damping rubber sheet is 2.5-3.5mm.
5. The utility model provides a damping noise reduction sound insulation structure which characterized in that includes:
a damped vibration damping clad steel plate according to any one of claims 1 to 4; and
the metal perforated sound absorbing plate is positioned on the inner side of the damping vibration attenuation composite steel plate and is arranged at intervals with the damping vibration attenuation composite steel plate,
and the space between the metal perforated sound absorbing plate and the damping vibration attenuation composite steel plate forms a sound absorbing air cavity.
6. The vibration and noise reducing and insulating structure according to claim 5, wherein:
wherein, the distance between the metal perforated sound absorbing plate and the damping vibration attenuation composite steel plate is 45-55mm.
7. The vibration and noise reducing and insulating structure according to claim 5, wherein:
wherein the metal perforated sound absorbing plate is an aluminum alloy perforated plate with the thickness of 0.5-1.5mm.
8. The vibration and noise reducing and insulating structure according to claim 7, wherein:
wherein the aperture of the perforation on the aluminum alloy perforated plate is 2.5-3.5mm, and the perforation rate is 15-25%.
9. The vibration and noise reducing and insulating structure according to claim 5, further comprising:
and the sound absorption non-woven fabric layer is covered on the side surface of the metal perforated sound absorption plate, which faces the damping vibration attenuation composite steel plate.
10. The vibration and noise reducing and insulating structure according to claim 9, wherein:
wherein the sound absorption non-woven fabric layer consists of two layers of sound absorption non-woven fabrics, and the surface density of each layer of sound absorption non-woven fabric is 62g/m 2 The thickness was 0.22mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223167558.8U CN219143790U (en) | 2022-11-29 | 2022-11-29 | Damping vibration attenuation composite steel plate and vibration attenuation noise reduction sound insulation structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223167558.8U CN219143790U (en) | 2022-11-29 | 2022-11-29 | Damping vibration attenuation composite steel plate and vibration attenuation noise reduction sound insulation structure |
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| Publication Number | Publication Date |
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| CN219143790U true CN219143790U (en) | 2023-06-06 |
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| CN202223167558.8U Active CN219143790U (en) | 2022-11-29 | 2022-11-29 | Damping vibration attenuation composite steel plate and vibration attenuation noise reduction sound insulation structure |
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| CN (1) | CN219143790U (en) |
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