CN210639979U - Inhale sound insulation composite member and transformer - Google Patents
Inhale sound insulation composite member and transformer Download PDFInfo
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- CN210639979U CN210639979U CN201921252614.3U CN201921252614U CN210639979U CN 210639979 U CN210639979 U CN 210639979U CN 201921252614 U CN201921252614 U CN 201921252614U CN 210639979 U CN210639979 U CN 210639979U
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- 238000009413 insulation Methods 0.000 title claims abstract description 78
- 239000002131 composite material Substances 0.000 title claims abstract description 58
- 238000010521 absorption reaction Methods 0.000 claims abstract description 137
- 238000013016 damping Methods 0.000 claims abstract description 33
- 229910052751 metal Inorganic materials 0.000 claims description 29
- 239000002184 metal Substances 0.000 claims description 29
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 239000002657 fibrous material Substances 0.000 claims description 13
- 229920001971 elastomer Polymers 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 8
- 229920000728 polyester Polymers 0.000 claims description 8
- 239000011491 glass wool Substances 0.000 claims description 7
- 239000011490 mineral wool Substances 0.000 claims description 4
- 210000002268 wool Anatomy 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 9
- 229920000742 Cotton Polymers 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 229920005549 butyl rubber Polymers 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011545 laboratory measurement Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
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Abstract
The utility model discloses a sound absorption and insulation composite piece and a transformer, wherein the sound absorption and insulation composite piece comprises a constrained damping sound insulation component, a damping layer and a rigid constrained layer, wherein the rigid base layer, the elastic damping layer and the rigid constrained layer are sequentially stacked; and the impedance composite sound absorption assembly is stacked on the rigid base layer and comprises a porous sound absorption unit and a resonance sound absorption unit which are sequentially stacked, and the resonance sound absorption unit comprises a micro-perforated plate and a first cavity. By arranging the constrained damping sound insulation component, the elastic damping layer plays a role in adjusting the sound insulation quantity of the low-frequency band of the rigid base layer, and the rigid constrained layer plays a role in improving the noise reduction effect of the elastic damping layer; the resonance sound absorption unit is provided with a porous sound absorption unit and a resonance sound absorption unit, wherein the resonance sound absorption unit adjusts the low-frequency-band sound absorption capacity of the porous sound absorption unit so as to be matched with the noise characteristics emitted by the transformer; along with the increase of the thickness of the first cavity, the wave crest of the sound absorption coefficient curve gradually moves to the low frequency band, and low frequency sound absorption is facilitated.
Description
Technical Field
The utility model relates to a noise pollution prevention and cure technical field, concretely relates to inhale sound insulation composite member and a transformer.
Background
In recent years, with the acceleration of urbanization progress, land resources are gradually tense, more and more transformer substations go deep into a central area of a city, the distance from each transformer substation to surrounding residents is greatly reduced, and the influence on the surrounding residents is great. The noise of the transformer substation is mainly generated by a main transformer, the frequency is low, the wavelength is large, the attenuation is slow, the penetration is strong, and in order to effectively reduce the influence of the noise of the main transformer on the surrounding environment, the installation of the sound absorption and insulation composite part on the outer side of the oil tank is one of feasible methods.
The sound absorption and insulation composite piece is made by cutting a sound insulation material into a certain specification according to a required size and additionally installing a sound absorption material with a certain thickness at the inner side of the sound absorption and insulation composite piece. When the composite member is applied on site, the sound absorption and insulation composite member is assembled outside the oil tank and connected with the oil tank shell to form a noise reduction shell, so that the noise emitted by the transformer is reduced. At present, the sound absorption material used in the conventional sound absorption and insulation composite part is usually porous sound absorption material, a perforated plate is additionally arranged on the inner side of the sound absorption material, and the sound insulation material is usually a metal sound insulation plate. The porous sound absorption material has better absorption capacity for medium and high frequency noise, but is not matched with the noise characteristics emitted by the transformer due to lower low-frequency sound absorption coefficient; and the low-frequency sound insulation quantity of the metal sound insulation plate is low, and the metal sound insulation plate is not matched with the noise characteristics emitted by the transformer, so that the overall noise reduction effect of the sound absorption and insulation composite part is limited, and the popularization and the use are limited.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the noise characteristic that inhales sound insulation composite and transformer among the prior art and send and unmatched defect to provide an inhale sound insulation composite.
A sound absorbing and insulating composite comprising:
the constrained damping sound insulation component comprises a rigid base layer, an elastic damping layer and a rigid constrained layer which are sequentially stacked;
and the impedance composite sound absorption assembly is stacked on the rigid base layer, and comprises a porous sound absorption unit and a resonance sound absorption unit which are sequentially stacked, wherein the porous sound absorption unit comprises a porous sound absorption layer, the resonance sound absorption unit comprises a micro-perforated plate and a first cavity, and a first connecting piece is connected with the porous sound absorption layer and the micro-perforated plate so as to form the first cavity between the three.
Further, the microperforated panel is the metal sheet, the thickness of microperforated panel is more than or equal to 0.5 millimeter and less than or equal to 1 millimeter, aperture on the microperforated panel is more than or equal to 0.5 millimeter and less than or equal to 1 millimeter, the hole interval on the microperforated panel is more than or equal to 5 millimeters and less than or equal to 15 millimeters.
Further, the thickness of the first cavity is greater than or equal to 1 cm and less than or equal to 10 cm.
Further, the porous sound absorption unit further comprises a second cavity, and a second connecting piece is connected with the rigid base layer and the porous sound absorption layer to form the second cavity between the rigid base layer and the porous sound absorption layer.
Further, the porous sound absorption layer is a fiber material layer, wherein the fiber material is made of any one of glass wool, rock wool and polyester fiber wool.
Further, the thickness of the second cavity is greater than or equal to 1 cm and less than or equal to 10 cm.
Further, the rigid base layer and the rigid constraint layer are both metal plates, and the elastic damping layer is a rubber plate.
Further, the thickness of the metal plate of the rigid base layer is greater than or equal to 1 mm and less than or equal to 2 mm, and the thickness of the rubber plate is greater than or equal to 3 mm and less than or equal to 6 mm.
Further, the first connecting piece and the second connecting piece are both made of square steel.
A transformer, comprising:
a transformer body;
and the sound absorption and insulation composite piece is arranged on the outer side of the transformer main body.
The utility model discloses technical scheme has following advantage:
1. the utility model provides a sound absorption and insulation composite part, which comprises a constrained damping and sound insulation component, a damping layer and a rigid constrained layer, wherein the rigid base layer, the elastic damping layer and the rigid constrained layer are sequentially stacked; and the impedance composite sound absorption assembly is stacked on the rigid base layer, and comprises a porous sound absorption unit and a resonance sound absorption unit which are sequentially stacked, wherein the porous sound absorption unit comprises a porous sound absorption layer, the resonance sound absorption unit comprises a micro-perforated plate and a first cavity, and a first connecting piece is connected with the porous sound absorption layer and the micro-perforated plate so as to form the first cavity between the three. According to the sound absorption and insulation composite part with the structure, the constraint damping sound insulation component is arranged, wherein the elastic damping layer plays a role in adjusting the sound insulation quantity of the low-frequency band of the rigid base layer, and the rigid constraint layer plays a role in improving the noise reduction effect of the elastic damping layer; the porous sound absorption unit and the resonance sound absorption unit are arranged, wherein the resonance sound absorption unit has the function of adjusting the sound absorption quantity of the low-frequency band of the porous sound absorption unit, so that the sound absorption coefficient of the low-frequency band can be effectively improved, and the width of the absorption frequency band can be expanded to be matched with the noise characteristic sent by the transformer; along with the increase of the thickness of the first cavity, the wave crest of the sound absorption coefficient curve gradually moves to the low frequency band, and low frequency sound absorption is facilitated.
2. The utility model provides a pair of inhale sound insulation composite, the microperforated panel is the metal sheet, microperforated panel thickness more than or equal to 0.5 millimeter and less than or equal to 1 millimeter, aperture on the microperforated panel is more than or equal to 0.5 millimeter and less than or equal to 1 millimeter, the hole interval on the microperforated panel is more than or equal to 5 millimeters and less than or equal to 15 millimeters. The thickness of the first cavity is larger than or equal to 1 cm and smaller than or equal to 10 cm. The porous sound absorption layer is a fiber material layer, wherein the fiber material is any one of glass wool, rock wool and polyester fiber wool. The thickness of the second cavity is larger than or equal to 1 cm and smaller than or equal to 10 cm. The rigid base layer and the rigid restraint layer are both metal plates, and the elastic damping layer is a rubber plate. The thickness of the metal plate of the rigid base layer is greater than or equal to 1 mm and less than or equal to 2 mm, and the thickness of the rubber plate is greater than or equal to 3 mm and less than or equal to 6 mm. The sound absorption and insulation composite part with the structure realizes the suppression of different noise frequency ranges of the transformer by adjusting the material parameters and the process parameters of the cavity, thereby realizing that the average sound absorption coefficient of 100-plus-500 Hz is not lower than 0.65, the noise reduction coefficient NRC is not lower than 0.75, the average sound insulation quantity of 100-plus-500 Hz is not lower than 25dB, and the weighted sound insulation quantity is not lower than 40dB, and meeting the noise reduction requirement of the transformer.
3. The utility model provides a pair of transformer, porous sound absorption unit still includes the second cavity, and the second connecting piece is connected the rigidity basic unit with porous sound absorption layer is in order to form between the three the second cavity. The sound absorption and insulation composite part with the structure has the advantages that the second cavity is arranged, the wave crest of the sound absorption coefficient curve gradually moves towards the low-frequency section along with the increase of the thickness of the second cavity, namely the increase of the thickness of the second cavity is beneficial to low-frequency sound absorption, and the speed of the second cavity moving towards the low-frequency section is slightly higher than the speed of the first cavity moving towards the low-frequency section.
4. The utility model provides a pair of transformer, include: a transformer body; and the sound absorption and insulation composite piece is arranged on the outer side of the transformer main body. The transformer with the structure has all the advantages brought by the sound absorption and insulation composite piece.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a sound absorption and insulation composite provided in an embodiment of the present invention;
FIG. 2 is a schematic structural view of the assembly of FIG. 1 showing the constrained damping sound insulation, porous sound absorbing layer and microperforated panel;
description of reference numerals:
1-rigid restraint layer, 2-elastic damping layer, 3-rigid base layer, 4-second cavity, 5-porous sound absorption layer, 6-first cavity, 7-micro perforated plate and 8-sound absorption and insulation composite piece.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
The utility model provides a transformer, it includes transformer main part and inhales the compound 8 of sound insulation as shown in figure 1, inhales the outside of compound 8 fixed connection of sound insulation in transformer main part host computer. Specifically, angle iron is welded on the outer side of the outer wall surface of the transformer main body, and the sound absorption and insulation composite piece 8 is fixedly arranged on the angle iron. The sound absorption and insulation composite part 8 comprises a constraint damping sound insulation component and an impedance composite sound absorption component, and the impedance composite sound absorption component is arranged close to the outer side of the transformer main body. Specifically, the impedance composite sound absorption assembly can be connected by adopting square steel, and the constraint damping sound insulation assembly can be connected by adopting a bonding mode. Of course, the sound absorption and insulation composite part 8 can also be used for reducing the noise of other devices and the like besides the transformer.
The constrained damping sound insulation component comprises a rigid base layer 3, an elastic damping layer 2 and a rigid constrained layer 1 which are sequentially stacked, and can be integrally formed through vulcanization.
Wherein it can be set: the rigid base layer 3 and the rigid restraint layer 1 are both metal plates, and the elastic damping layer 2 is a rubber plate. Wherein the metal plate of the rigid base layer 3 is hereinafter referred to as a first metal plate and the metal plate of the rigid constraining layer 1 is referred to as a second metal plate. The thickness of the first metal plate and the thickness of the second metal plate are both larger than or equal to 1 mm and smaller than or equal to 2 mm, and the thickness of the rubber plate is larger than or equal to 3 mm and smaller than or equal to 6 mm. Specifically, the rubber plate can be damping rubber such as butyl rubber or nitrile rubber; the first metal plate may be a metal plate such as a steel plate or an aluminum plate, and the second metal plate may be a metal plate such as a steel plate or an aluminum plate.
As shown in fig. 1, the impedance composite sound absorption assembly is stacked on the rigid base layer 3, and specifically includes a porous sound absorption unit and a resonant sound absorption unit which are stacked in sequence. Wherein the porous sound absorbing unit comprises a porous sound absorbing layer 5 and a second cavity 4 as shown in fig. 2, and the resonant sound absorbing unit comprises a micro perforated plate 7 and a first cavity 6 as shown in fig. 2. As a further alternative, the second cavity 4 may not be provided.
In the embodiment, the porous sound absorption layer 5 is a fiber material layer, and the fiber material layer is made of any one of glass wool, rock wool and polyester fiber wool; wherein the fiber material has an areal density of 500g/m or more2And is not more than 2500g/m2And the thickness of the fiber material layer is more than or equal to 1 cm and less than or equal to 15 cm.
And can be provided with: the micro-perforated plate 7 is a metal plate, the thickness of the micro-perforated plate 7 is greater than or equal to 0.5 mm and less than or equal to 1 mm, the aperture on the micro-perforated plate 7 is greater than or equal to 0.5 mm and less than or equal to 1 mm, and the hole pitch on the micro-perforated plate 7 is greater than or equal to 5 mm and less than or equal to 15 mm.
Wherein a first connecting member connects the porous sound-absorbing layer 5 and the microperforated panel 7 to form a first cavity 6 therebetween. Specifically, the first cavity 6 is formed between the porous sound absorption layer 5 and the micro-perforated plate 7 through square steel arranged between the porous sound absorption layer and the micro-perforated plate, and the square steel is arranged between the circumferential edges of the porous sound absorption layer 5 and the micro-perforated plate 7 and is fixedly connected with the porous sound absorption layer 5 and the micro-perforated plate 7 respectively. Wherein the thickness of the first cavity 6 is greater than or equal to 1 cm and less than or equal to 10 cm.
Wherein the second connector connects the rigid base layer 3 and the porous sound absorbing layer 5 to form a second cavity 4 therebetween. Specifically, a second cavity 4 is formed between the rigid base layer 3 and the porous sound absorption layer 5 by arranging square steel between the rigid base layer and the porous sound absorption layer, and the square steel is arranged between the circumferential edges of the base layer 3 and the porous sound absorption layer 5 and is fixedly connected with the base layer 3 and the porous sound absorption layer 5 respectively. Wherein the thickness of the second cavity 4 is greater than or equal to 1 cm and less than or equal to 10 cm. Note that fig. 1 shows only the positional relationship between the first cavity 6 and the second cavity 4.
In this embodiment, the rigid base layer 3 and the rigid constraint layer 1 are both steel plates with a thickness of 1 mm, and the elastic damping layer 2 is a butyl rubber plate with a thickness of 3 mm; the micro-perforated plate 7 is a steel micro-perforated plate with the thickness of 0.8 mm, the aperture of 1 mm and the hole spacing of 5 mm; the fiber material layer is a polyester fiber cotton layer, and the surface density of the polyester fiber cotton layer is 2000g/m2And the thickness is 5 cm; the first cavity 6 has a thickness of 10 cm and the second cavity 4 has a thickness of 10 cm.
Example 2
This embodiment provides a transformer, which includes a transformer main body and a sound absorption and insulation composite 8 as shown in fig. 1, wherein the sound absorption and insulation composite 8 is disposed on the outer side of the transformer main body, and the structure of the sound absorption and insulation composite 8 is the same as that of the sound absorption and insulation composite 8 provided in embodiment 1, but there is a difference between the material and the size of the sound absorption and insulation composite 8 in embodiment 1.
In this embodiment, the rigid base layer 3 and the rigid constraint layer 1 are both steel plates with a thickness of 1 mm, and the elastic damping layer 2 is a butyl rubber plate with a thickness of 4 mm; the micro-perforated plate 7 is an aluminum micro-perforated plate with the thickness of 0.5 mm, the aperture of 1 mm and the hole spacing of 15 mm; the fiber material layer is a polyester fiber cotton layer, and the surface density of the polyester fiber cotton layer is500g/m2And the thickness is 5 cm; the first cavity 6 has a thickness of 5 cm and the second cavity 4 has a thickness of 5 cm.
Example 3
This embodiment provides a transformer, which includes a transformer main body and a sound absorption and insulation composite 8 as shown in fig. 1, wherein the sound absorption and insulation composite 8 is disposed on the outer side of the transformer main body, and the structure of the sound absorption and insulation composite 8 is the same as that of the sound absorption and insulation composite 8 provided in embodiment 1, but there is a difference between the material and the size of the sound absorption and insulation composite 8 in embodiment 1.
In this embodiment, the rigid base layer 3 and the rigid constraint layer 1 are both steel plates with a thickness of 1.5 mm, and the elastic damping layer 2 is a butyl rubber plate with a thickness of 5 mm; the micro-perforated plate 7 is a steel micro-perforated plate with the thickness of 1 mm, the aperture of 0.83 mm and the hole spacing of 12.5 mm; the fiber material layer is a glass wool layer with the surface density of 1500g/m2And the thickness is 5 cm; the first cavity 6 has a thickness of 7.5 cm and the second cavity 4 has a thickness of 7.5 cm.
Comparative example
Test environment for sound absorption: according to the national standard GB/T18696.2-2002 section 2 of the measurement of sound absorption coefficient and sound impedance in an acoustic impedance tube: transfer function method;
test environment for sound insulation: part 3 of acoustic building and building component sound insulation measurement according to national standard GB/T19889.3-2005: laboratory measurements of building component air sound insulation ";
reference object: the sound absorption unit is taken as a single porous sound absorption unit, wherein the porous sound absorption unit is specifically arranged to be a 10 cm glass wool layer as a first reference object; the sound insulation unit is taken as a single metal plate, wherein the metal plate is specifically set to be a metal plate with the thickness of 1 mm, a metal plate with the thickness of 2 mm and a metal plate with the thickness of 3 mm in sequence as a second reference object;
comparison object: the absorbing and separating composite pieces in the embodiments 1 to 3 are used as comparison objects;
table 1 shows sound absorption coefficients of the comparison object and the first reference object at different frequencies; table 2 shows the amount of sound insulation and the weighted amount of sound insulation at different frequencies for the comparison object and the second reference object.
TABLE 1
TABLE 2
Table 1 was analyzed and the conclusion was drawn: in the embodiments 1-3, the average sound absorption coefficient and the noise reduction coefficient NRC at 100-500Hz are both obviously higher than 10 cm of glass wool, so the utility model is beneficial to the noise reduction of medium and low frequencies from 100Hz to below 500 Hz; and because the noise of transformer is mainly with the low and medium frequency noise below 500Hz of 100Hz as the fundamental frequency, from this it can be seen that the utility model discloses be favorable to falling of transformer making an uproar.
Table 2 was analyzed and the conclusion was drawn: in the embodiments 1-3, the average sound insulation and the weighted sound insulation at 100-500Hz are obviously higher than the steel plate with the thickness of 1 mm, the steel plate with the thickness of 2 mm and the steel plate with the thickness of 3 mm, therefore, the utility model is beneficial to the noise reduction at the medium and low frequencies from 100Hz to below 500 Hz; and because the noise of transformer is mainly with the low and medium frequency noise below 500Hz of 100Hz as the fundamental frequency, from this it can be seen that the utility model discloses be favorable to falling of transformer making an uproar.
The utility model discloses a sound absorption and insulation composite part, through being provided with the constrained damping sound insulation component, wherein the elastic damping layer 2 plays a role in adjusting the low-frequency band sound insulation quantity of the rigid base layer 3, and the rigid constrained layer 1 plays a role in improving the noise reduction effect of the elastic damping layer 2; the porous sound absorption unit and the resonance sound absorption unit are arranged, wherein the resonance sound absorption unit has the function of adjusting the sound absorption quantity of the low-frequency band of the porous sound absorption unit, so that the sound absorption coefficient of the low-frequency band can be effectively improved, and the width of the absorption frequency band can be expanded to be matched with the noise characteristic sent by the transformer; along with the increase of the thickness of the first cavity 6, the wave crest of the sound absorption coefficient curve gradually moves to a low-frequency section, so that low-frequency sound absorption is facilitated; by arranging the second cavity 4, along with the increase of the thickness of the second cavity 4, the wave crest of the sound absorption coefficient curve gradually moves to a low-frequency band, namely the increase of the thickness of the second cavity 4 is beneficial to low-frequency sound absorption, wherein the speed of the second cavity 4 moving to the low-frequency band is slightly higher than the speed of the first cavity 6 moving to the low-frequency band; the suppression of different noise frequency ranges of the transformer is realized by adjusting the material parameters and the process parameters of the cavity, so that the average sound absorption coefficient of 100 plus 500Hz is not lower than 0.65, the noise reduction coefficient NRC is not lower than 0.75, the average sound insulation quantity of 100 plus 500Hz is not lower than 25dB, the weighted sound insulation quantity is not lower than 40dB, and the noise reduction requirement of the transformer can be met.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (10)
1. A sound absorbing and insulating composite, comprising:
the constrained damping sound insulation component comprises a rigid base layer, an elastic damping layer and a rigid constrained layer which are sequentially stacked;
and the impedance composite sound absorption assembly is stacked on the rigid base layer, and comprises a porous sound absorption unit and a resonance sound absorption unit which are sequentially stacked, wherein the porous sound absorption unit comprises a porous sound absorption layer, the resonance sound absorption unit comprises a micro-perforated plate and a first cavity, and a first connecting piece is connected with the porous sound absorption layer and the micro-perforated plate so as to form the first cavity between the three.
2. The sound absorption and insulation composite piece according to claim 1, wherein the micro-perforated plate is a metal plate, the thickness of the micro-perforated plate is greater than or equal to 0.5 mm and less than or equal to 1 mm, the hole diameter of the micro-perforated plate is greater than or equal to 0.5 mm and less than or equal to 1 mm, and the hole pitch of the micro-perforated plate is greater than or equal to 5 mm and less than or equal to 15 mm.
3. The sound absorption and insulation composite of claim 2, wherein the thickness of the first cavity is greater than or equal to 1 cm and less than or equal to 10 cm.
4. The sound absorption and insulation composite as claimed in any one of claims 1 to 3, wherein the porous sound absorption unit further comprises a second cavity, and a second connecting member connects the rigid base layer and the porous sound absorption layer to form the second cavity therebetween.
5. The sound absorption and insulation composite as claimed in claim 4, wherein the porous sound absorption layer is a fiber material layer, wherein the fiber material is made of any one of glass wool, rock wool and polyester fiber wool.
6. The sound absorption and insulation composite piece according to claim 4, wherein the thickness of the second cavity is greater than or equal to 1 cm and less than or equal to 10 cm.
7. The sound absorption and insulation composite piece according to claim 4, wherein the rigid base layer and the rigid constraint layer are both metal plates, and the elastic damping layer is a rubber plate.
8. The sound absorption and insulation composite piece according to claim 7, wherein the metal plate of the rigid substrate has a thickness of 1 mm or more and 2 mm or less, and the rubber plate has a thickness of 3 mm or more and 6 mm or less.
9. The sound absorption and insulation composite piece according to claim 4, wherein the first connecting piece and the second connecting piece are both made of square steel.
10. A transformer, comprising:
a transformer body;
and the sound absorption and insulation composite as claimed in any one of claims 1 to 9, which is disposed outside the transformer body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921252614.3U CN210639979U (en) | 2019-08-02 | 2019-08-02 | Inhale sound insulation composite member and transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921252614.3U CN210639979U (en) | 2019-08-02 | 2019-08-02 | Inhale sound insulation composite member and transformer |
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| CN210639979U true CN210639979U (en) | 2020-05-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110459393A (en) * | 2019-08-02 | 2019-11-15 | 全球能源互联网研究院有限公司 | A kind of sound absorption composite members and a kind of transformer |
| CN112537263A (en) * | 2020-10-29 | 2021-03-23 | 安徽江淮汽车集团股份有限公司 | Automobile with noise reduction and sound collection device |
| CN114030247A (en) * | 2021-11-09 | 2022-02-11 | 江苏科技大学 | Sound absorption and insulation light composite board based on acoustic black hole |
-
2019
- 2019-08-02 CN CN201921252614.3U patent/CN210639979U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110459393A (en) * | 2019-08-02 | 2019-11-15 | 全球能源互联网研究院有限公司 | A kind of sound absorption composite members and a kind of transformer |
| CN112537263A (en) * | 2020-10-29 | 2021-03-23 | 安徽江淮汽车集团股份有限公司 | Automobile with noise reduction and sound collection device |
| CN114030247A (en) * | 2021-11-09 | 2022-02-11 | 江苏科技大学 | Sound absorption and insulation light composite board based on acoustic black hole |
| CN114030247B (en) * | 2021-11-09 | 2023-09-29 | 江苏科技大学 | Sound absorption and insulation light composite board based on acoustic black hole |
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