CN211604681U - Sound-deadening element and sound-deadening device - Google Patents

Abstract

The utility model provides a noise elimination component and silencer, noise elimination component include the sound absorption basic unit that adopts porous sound absorbent to make and adopt the shaping layer that sound absorbent made, and the shaping layer sets up on the outer peripheral face of sound absorption basic unit. The silencer can reduce the processing difficulty of the silencer, saves the processing and manufacturing cost, and has wide silencing frequency band range and good silencing effect. The muffler includes a sound attenuating element.

Description

Sound-deadening element and sound-deadening device

Technical Field

The utility model relates to a noise elimination technical field particularly, relates to a noise elimination component and silencer.

Background

Mufflers are devices that allow airflow but block or reduce sound transmission, and are important measures to reduce or eliminate aerodynamic noise, and can be generally classified into resistive mufflers, reactive mufflers, and resistive composite mufflers. Resistive mufflers are mufflers commonly used in ventilation muffling systems. Common resistive mufflers include a sheet muffler, a matrix muffler, a muffling air pipe and various derivative products, and the muffling principle of the common resistive mufflers is that the muffling is achieved by utilizing the sound absorption performance of foam or fiber porous sound absorption materials. The resistive muffler usually adopts foam or fiber materials (such as glass wool) as sound absorption materials, and because the strength of the conventional glass wool is low, the conventional glass wool cannot be independently used as a noise elimination element in the muffler, and a porous plate must be externally coated, the weight of the muffler is inevitably increased, and the inconvenience is brought to production and processing; meanwhile, the porous plate can make up the defect of low strength of the conventional glass wool, but the manufacturing process takes much labor and material, and the sound absorption efficiency of the glass wool is reduced.

The research shows that the prior resistive muffler has the following defects:

the processing is inconvenient and the cost is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a noise elimination component and silencer, its processing degree of difficulty that can reduce the silencer saves processing manufacturing cost.

The embodiment of the utility model is realized like this:

in a first aspect, embodiments provide a sound attenuating element comprising:

adopt the sound absorption basic unit that porous sound absorbent made and adopt the design layer that sound absorbent made, design layer sets up on the outer peripheral face of sound absorption basic unit.

In an alternative embodiment, the sound-absorbing base layer is plate-shaped, and at least one of the two plate surfaces of the sound-absorbing base layer is provided with a convex portion.

In an alternative embodiment, the number of the convex portions is plural, each convex portion extending in the first direction; the plurality of convex parts are arranged at intervals along a second direction forming an included angle with the first direction.

In an alternative embodiment, the cross-sectional shape of the convex portion in the direction perpendicular to the first direction is an arc or a dogleg.

In an alternative embodiment, at least two of the plurality of protrusions are different in shape.

In an optional embodiment, the shaping layer is coated on the outer circumferential surface of the sound absorption base layer by adopting a spraying process.

In an alternative embodiment, the calibration layer is bonded to the sound absorbing base layer.

In a second aspect, embodiments provide a muffler comprising:

the sound attenuating element of any one of the preceding embodiments.

In an alternative embodiment, the muffler further comprises an outer shell, the sound-attenuating element being located within the lumen of the outer shell and being connected to the outer shell, the sound-attenuating element extending in the direction of extension of the outer shell.

In an alternative embodiment, the number of sound-attenuating elements is a plurality, with gaps between adjacent sound-attenuating elements.

The embodiment of the utility model provides a beneficial effect is:

in conclusion, the sound attenuation element provided by the embodiment has the advantages that the shaping layer is arranged outside the sound absorption base layer, the shaping layer can enhance the structural strength of the sound absorption base layer, the effect of shaping the sound absorption base layer is achieved, the sound absorption base layer is not prone to deformation, and the sound attenuation element can be directly used. And the shaping layer is directly coated outside the sound absorption base layer, so that the processing and manufacturing are convenient, the processing difficulty is reduced, and the processing cost is saved. Meanwhile, after the shaping layer is coated outside the silencing base layer, a three-dimensional net structure with certain strength and toughness is formed at the connecting position of the shaping layer and the silencing base layer, so that the propagation time of sound waves in the silencing element is greatly prolonged, the time for converting sound energy into mechanical energy caused by fiber vibration due to the sound waves is further increased, the sound wave energy entering the silencing element is rapidly attenuated, and the silencing element has good sound absorption performance. Compared with the existing resistive silencer, the silencing element has enhanced sound absorption effects at low frequency, medium frequency and high frequency, and can overcome the defect of insufficient sound absorption performance of the existing silencer with the micropore resonance sound absorption structure and the diffusion silencer at low frequency and high frequency.

The embodiment also provides a silencer, which comprises the silencing element, and is convenient to process and manufacture, low in cost and strong in silencing performance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a muffler element according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a deformation of the muffler element according to the embodiment of the present invention;

fig. 3 is a cross-sectional view of a modified structure of a muffler element according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of a sound absorbing base layer of an embodiment of the present invention;

fig. 5 is a cross-sectional view of a muffler in accordance with an embodiment of the present invention;

fig. 6 is a side view of a muffler according to an embodiment of the present invention.

Icon:

001-a muffler; 100-a sound-damping element; 110-a sound absorbing base layer; 111-a first board surface; 112-second board surface; 113-a first side; 114-a second side; 115-convex part; 120-shaping layer; 200-a housing; 210-a tube; 220-a connector; 230-ventilation channel.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

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 the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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.

Referring to fig. 1, the present embodiment provides a silencing element 100, which is applied to a ventilation duct, a fresh air system of an office or a factory, an air intake and exhaust system of a workshop or an air intake and exhaust system of equipment, and the like, and is used for reducing noise.

Referring to fig. 1, the muffling element 100 of the present embodiment includes a sound-absorbing base layer 110 made of a porous sound-absorbing material and a shaping layer 120 made of a sound-absorbing material, wherein the shaping layer 120 is disposed on an outer circumferential surface of the sound-absorbing base layer 110.

The sound attenuation element 100 provided by the embodiment has the advantages that the shaping layer 120 is arranged outside the sound absorption base layer 110, the shaping layer 120 can enhance the structural strength of the sound absorption base layer 110, the sound absorption base layer is shaped, the sound attenuation base layer is not prone to deformation, and the sound attenuation element can be directly used. And the shaping layer 120 is directly arranged outside the sound absorption base layer 110, so that the processing and the manufacturing are convenient, the processing difficulty is reduced, and the processing cost is saved. Meanwhile, after the shaping layer 120 is arranged outside the silencing base layer, a three-dimensional net structure with certain strength and toughness is formed at the connecting position of the shaping layer 120 and the silencing base layer, so that the propagation time of sound waves in the silencing element 100 is greatly prolonged, the time for converting sound energy into mechanical energy caused by fiber vibration due to the sound waves is further increased, the sound wave energy entering the silencing element 100 is rapidly attenuated, and the silencing element 100 has good sound absorption performance. Compared with the existing resistive muffler 001, the sound absorption effect of the noise elimination element 100 at low frequency, medium frequency and high frequency is enhanced, and the defect of insufficient sound absorption performance of the existing muffler 001 with the micropore resonance sound absorption structure and the existing diffusion muffler 001 at low frequency and high frequency can be overcome.

In addition, the shaping layer 120 made of the sound-absorbing material is arranged outside the sound-absorbing base layer 110 made of the porous sound-absorbing material, so that the sound-absorbing base layer 110 is shaped, the structure of the sound-absorbing base layer 110 is stable, the noise elimination element 100 with higher strength is formed, a porous plate is not required to be arranged, the light weight is realized, and the noise diffusion effect is realized; the interior of the silencing element 100 does not need to be provided with any skeleton and a fiber protective layer, so that the whole structure is simple in structure and light in weight, processing and production are facilitated, manufacturing cost is saved, and the silencing element is convenient to mount, dismount and transport.

The porous sound absorbing material may be one or more of melamine wool, aluminum silicate wool, mineral wool, rock wool, centrifugal glass wool, and glass fiber needle felt. In addition, the sound absorbing material may be one or more of bio-fiber (such as biomass raw fiber, biomass regenerated fiber, or biomass synthetic fiber), mineral fiber (the main component is various oxides, such as silica, alumina, or magnesia), adhesive, fire retardant, moisture proof agent, enzyme proof agent, and preservative.

Referring to fig. 2 to 4, in this embodiment, optionally, the sound absorption base layer 110 is configured as a plate-shaped structure, the sound absorption base layer 110 has a first plate surface 111, a first side surface 113, a second plate surface 112, and a second side surface 114, which are sequentially connected, the first plate surface 111 is opposite to the second plate surface 112, and the first side surface 113 is opposite to the second side surface 114. The fixing layer 120 is disposed on the first board surface 111, the second board surface 112, the first side surface 113, and the second side surface 114 at the same time, in other words, the fixing layer 120 covers the first board surface 111, the second board surface 112, the first side surface 113, and the second side surface 114. Further, the first board surface 111 is parallel to the second board surface 112, the first side surface 113 is parallel to the second side surface 114, and the sound absorption base layer 110 has a regular structure and is convenient to process and manufacture.

Optionally, at least one of the first panel surface 111 and the second panel surface 112 of the sound absorption base layer 110 is provided with a convex portion 115, and in this embodiment, optionally, the first panel surface 111 and the second panel surface 112 are both provided with a convex portion 115. Further, the protruding portion 115 is elongated, and the protruding portion 115 extends along a first direction, wherein the first direction is a direction parallel to an intersection line of the first plate surface 111 and the first side surface 113. Further, both ends of the convex portion 115 in the length direction thereof extend to the opposite sides of the absorbent base layer, respectively.

Alternatively, the outer contour of the cross-sectional shape of the convex portion 115 is an arc shape or a fold line shape. For example, the cross-sectional shape of the convex portion 115 is semicircular, wavy, triangular, quadrangular, or the like, which is not illustrated here. Here, the cross section of the convex portion 115 means a plane perpendicular to the longitudinal direction of the convex portion 115.

It is apparent that in other embodiments, the outer contour of the cross-sectional shape of the projections 115 may include both arcs and straight lines.

It should be noted that, the number of the convex portions 115 is selected as needed, the number of the convex portions 115 may be set to be one, the number of the convex portions 115 may also be set to be multiple, when the number of the convex portions 115 is multiple, the multiple convex portions 115 are arranged at intervals along a second direction, the second direction has an included angle with the first direction, and optionally, the second direction is perpendicular to the first side surface 113 or the second side surface 114. Each of the convex portions 115 has a long bar shape, and the plurality of convex portions 115 are arranged in parallel at intervals. The convex portions 115 on the first plate surface 111 and the second plate surface 112 are covered by the sizing layer 120.

It should be noted that, when the number of the convex portions 115 is plural, the cross-sectional shapes of the plural convex portions 115 may be set to be the same, for example, the cross-sectional shapes of the plural convex portions 115 are all arc-shaped. Obviously, in other embodiments, the cross-sectional shapes of at least two convex portions 115 of the plurality of convex portions 115 may be set to be different.

In other embodiments, the sound absorption base layer 110 may not be provided with the projections 115, and the sound absorption base layer 110 may have a rectangular plate shape, a square plate shape, or a plate shape of other shapes.

In this embodiment, optionally, the sizing layer 120 may be directly sprayed on the first board surface 111, the second board surface 112, the first side surface 113, and the second side surface 114 of the sound absorption base layer 110.

In other embodiments, the sizing layer 120 may be adhered to the first panel 111, the second panel 112, the first side 113, and the second side 114 of the sound absorbing base layer 110.

Further, the thickness of the setting layer 120 is set to be 0.1mm-30.0mm, for example, the thickness of the setting layer 120 is set to be 0.1mm, 15.0mm or 30.0mm, which is not listed in this embodiment.

It should be noted that the number of the sizing layers 120 may be set as one or more layers as needed, and when the number of the sizing layers 120 is set as multiple layers, the sizing layer 120 located at the inner side of the adjacent sizing layers 120 is covered by the sizing layer 120 located at the outer side.

In this embodiment, optionally, the thickness of the silencing element 100 is set to be 0.1mm-300.0mm, wherein the thickness direction of the silencing element 100 is a direction perpendicular to the first plate surface 111 or the second plate surface 112. Alternatively, the thickness of the silencing element 100 is set to 0.1mm, 150.0mm or 300.0mm, which is not listed in this embodiment.

The silencing element 100 provided by the embodiment has the advantages of simple structure, light weight, convenience in processing and manufacturing and low cost.

Referring to fig. 5 to 6, the present embodiment further provides a muffler 001, which includes a housing 200 and the muffler element 100 provided in the above embodiment, the muffler element 100 is connected to the housing 200, and the housing 200 is configured to be mounted on an airflow path of an exhaust system.

Optionally, the housing 200 is a cylindrical structure with two open ends, the cross-sectional shape of the housing 200 may be circular, oval, square, etc., the two openings of the housing 200 communicate with each other and form a ventilation channel 230, the silencing element 100 is disposed in the ventilation channel 230, and an airflow entering from one port of the housing 200 may flow through the silencing element 100 and then flow out from the other port of the housing 200, so as to reduce noise.

Further, shell 200 includes body 210 and connecting piece 220, and connecting piece 220 installs the both ends at body 210 extending direction, and connecting piece 220 and body 210 can adopt modes such as riveting, welding, screw connection fixed connection. The connector 220 can be connected with the device to which the muffler 001 is to be mounted, or a plurality of the housings 200 are integrally connected by adjacent connectors 220.

In this embodiment, optionally, the cross-sectional shape of the pipe body 210 is rectangular, the silencing element 100 is installed in the pipe body 210, and the first side 113 and the second side 114 of the sound absorption base layer 110 correspond to two ports of the pipe body 210, respectively. Optionally, the sound absorption base layer 110 further includes a third side and a fourth side opposite to each other, and the third side and the fourth side are simultaneously connected to the first panel 111, the second panel 112, the first side 113 and the second side 114. The third side and the fourth side are connected to two inner walls of tube 210 opposite to each other, so as to realize the fixed connection of silencing element 100 to tube 210. The sound absorption base layer 110 and the pipe body 210 may be fixedly connected by means of bonding, screwing, bolting, etc.

In this embodiment, optionally, the number of the silencing elements 100 is set to be a plurality, the plurality of silencing elements 100 are arranged at intervals along the second direction, the plurality of silencing elements 100 are arranged at intervals in parallel, and the plurality of silencing elements 100 and the pipe body 210 form a plurality of ventilation air channels. After the airflow passes through the ventilation channel 230, noise elimination and noise reduction are realized.

The silencer 001 provided by the embodiment has the advantages of simple structure, wide silencing frequency band range and wide application range; and the cost is low, and the processing and the manufacturing are convenient.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A sound attenuating element, characterized in that it comprises:

adopt the sound absorption basic unit that porous sound absorbing material made and adopt the design layer that sound absorbing material made, the design layer sets up on the outer peripheral face of sound absorption basic unit.

2. The sound attenuating element defined in claim 1, wherein:

the sound absorption basic unit is platy, and at least one of two faces of the sound absorption basic unit is provided with a convex part.

3. The sound attenuating element defined in claim 2, wherein:

the number of the convex parts is multiple, and each convex part extends along a first direction; and the plurality of convex parts are arranged at intervals along a second direction which forms an included angle with the first direction.

4. The sound attenuating element defined in claim 3, wherein:

the cross section of the convex part along the direction perpendicular to the first direction is arc-shaped or fold-line-shaped.

5. The sound attenuating element defined in claim 3, wherein:

at least two of the plurality of projections have different shapes.

6. The sound attenuating element defined in claim 1, wherein:

the shaping layer is coated on the outer peripheral surface of the sound absorption base layer by adopting a spraying process.

7. The sound attenuating element defined in claim 1, wherein:

the shaping layer is bonded with the sound absorption base layer.

8. A muffler, characterized in that the muffler comprises:

the sound attenuating element defined in any one of claims 1-7.

9. The muffler of claim 8, wherein:

the muffler further comprises an outer shell, wherein the sound attenuation element is positioned in the cavity of the outer shell and is connected with the outer shell, and the sound attenuation element extends along the extension direction of the outer shell.

10. The muffler of claim 9 wherein:

the number of the silencing elements is multiple, and gaps are reserved between the adjacent silencing elements.

Images