CN216388741U - Noise elimination subassembly, noise elimination piece and silencer - Google Patents

Abstract

The utility model discloses a silencing assembly which comprises at least one layer of silencing film, wherein the silencing film comprises a base layer and piles arranged on the surfaces of two sides of the base layer. The utility model also discloses a silencing sheet which comprises a shell with meshes and a flow guide cover, wherein the silencing assembly is arranged in the shell. The utility model also discloses a silencer which comprises a plurality of silencing pieces, wherein the silencing pieces are arranged in an array mode. Compared with the prior art, the noise elimination assembly formed by at least one layer of noise elimination film is arranged, the noise elimination film comprises the base layer and the fluff, the fluff realizes the absorption of middle and high frequency noise, after the noise elimination film is tensioned, the base layer can cause the vibration of the base layer to eliminate the low frequency noise when the base layer is penetrated by the low frequency noise, and the film structure is adopted, so that the complete filling of the interior of the noise elimination sheet is not needed, the weight of the noise elimination sheet is reduced, and the whole weight of the noise eliminator is reduced.

Description

Noise elimination subassembly, noise elimination piece and silencer

Technical Field

The utility model relates to a silencer, in particular to a silencing assembly, a silencing sheet and a silencer.

Background

At present, a silencing sheet is a main component of a silencer and has the main function of silencing and reducing noise. The noise-resistant and noise-resistant composite material is used for preventing noise generated when equipment such as an air conditioning unit, a fan, a cooling tower, a boiler, an industrial generator set, a marine diesel engine and a gas turbine runs from radiating and spreading outwards. According to the prior art, the method is generally divided into a resistive type and a non-resistive type, and the resistive type is commonly used. Most of the traditional resistive muffling sheets are metal perforated plates as facing materials, and glass wool, rock wool and the like are filled in the traditional resistive muffling sheets as sound absorbing materials, so that high-frequency and medium-frequency noise can be effectively reduced, and low-frequency noise is eliminated; but the sound absorption material has higher density and heavier weight, and the weight of the silencer is easy to exceed the standard; the method can not be applied to special occasions and still has an optimized space.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a silencing component, a silencing sheet and a silencer, and aims to solve the technical problems of ensuring that the medium-frequency and high-frequency noises are effectively reduced, eliminating the low-frequency noises and reducing the weight of the silencer.

In order to solve the problems, the utility model adopts the following technical scheme: a sound-deadening assembly includes at least one sound-deadening membrane including a base layer and naps provided on both side surfaces of the base layer.

Further, the fluff is made of animal fiber, plant fiber, chemical fiber, glass fiber or mineral fiber.

The utility model also discloses a silencing sheet, which comprises a shell with meshes and a flow guide cover, wherein the silencing assembly is arranged in the shell, the two opposite ends of the silencing assembly are respectively provided with a fixing assembly, and the silencing assembly is straightened and fixed in the shell through the fixing assemblies.

Further, a gap between the sound attenuation component and the shell is filled with sound absorption materials.

Furthermore, the fixed component comprises an embedded fixed seat, a plurality of bolts, nuts, clamping blocks and pressing sheets, the clamping blocks are arranged between two adjacent layers of sound eliminating films, the pressing sheets are arranged outside the two layers of sound eliminating films on the outermost side, the pressing sheets and the clamping blocks are arranged oppositely and are arranged at two opposite ends of the sound eliminating films, the bolts penetrate through the pressing sheets, the clamping blocks and the sound eliminating films, the two ends of the bolt penetrate through the nuts and are connected and fixed in the embedded fixed seat, the embedded fixed seats are fixed at two opposite ends of the shell respectively, and the sound eliminating component is tensioned and fixed in the shell.

Furthermore, a tensioning adjusting mechanism is arranged on one embedded fixing seat and comprises at least one adjusting screw, a screw hole is formed in the embedded fixing seat, and the adjusting screw penetrates through the side face of the shell and then is in threaded connection with the screw hole.

Furthermore, the embedded fixing seat is n-shaped and comprises two opposite side arms, connecting holes are formed in the side arms, and two ends of the bolt are inserted into the connecting holes.

Furthermore, a notch is arranged on the side arm of at least one embedded fixing seat and communicated with the connecting hole.

The utility model also discloses a silencer which comprises a plurality of silencing pieces, wherein the silencing pieces are arranged in an array mode.

Compared with the prior art, the utility model is provided with the silencing component consisting of at least one layer of silencing film, the silencing film comprises the base layer and the fluff, the fluff realizes the absorption of middle and high frequency noises, the base layer can vibrate when the low frequency noise penetrates after the silencing film is tensioned, so as to eliminate the low frequency noise, and the film structure is adopted, so that the inner part of the silencing sheet is not required to be completely filled, thereby reducing the weight of the silencing sheet and further reducing the whole weight of the silencer.

Drawings

Fig. 1 is a schematic view of the internal structure of the noise-canceling sheet of the present invention.

Fig. 2 is a partially enlarged view of the reference mark a in fig. 1.

Fig. 3 is a partially enlarged view of the reference B in fig. 1.

Figure 4 is a schematic view of a first arrangement of the inventive sound-damping membrane.

Figure 5 is a schematic view of a second arrangement of the inventive sound-damping membrane.

Fig. 6 is a schematic view of a first structure of the embedded fixing base according to the present invention.

Fig. 7 is a schematic view of a second structure of the embedded fixing base of the present invention.

Figure 8 is a top view of a first form of applying the muffler to a pipe.

Fig. 9 is a front view of a first form of applying the muffler to a pipe.

Figure 10 is a top view of a second form of applying the muffler to a pipe.

Fig. 11 is a front view of a second form of applying the muffler to a pipe.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in figure 1, the utility model discloses a silencing assembly, which comprises at least one layer of silencing film 2, wherein the silencing film 2 comprises a base layer 21 and villi 22 arranged on at least one side surface of the base layer 21, a villi surface is formed, and the side without the villi 22 forms a back surface.

The length of the pile 22 may be 5-40 mm.

In the present invention, the fluff 22 is made of one or more of animal fibers, plant fibers, chemical fibers, glass fibers, or mineral fibers.

The base layer 21 may be made of leather, artificial leather, canvas, or cotton, and the piles 22 may be formed on the base layer 21 by means of pasting or weaving.

As shown in fig. 4, the base layer 21 is provided with piles 22 on both side surfaces thereof. It is of course also possible to use a base layer 21 provided with piles 22 on one of its side surfaces, as shown in figure 5.

When the silencing films 2 of the silencing assembly adopt a single-sided fluff structure as shown in fig. 4, the silencing films 2 may be arranged in a manner that the back surfaces of two layers of silencing films 2 close to the middle position are opposite and leave a gap L, and the fluff surfaces of the rest silencing films 2 are sequentially arranged in the same direction. The clearance L is 2-10 mm.

As shown in fig. 1 and 8, the present invention also discloses a silencing sheet, which comprises a housing 1 with meshes, a flow guide cover 13, and the silencing assembly, wherein the silencing assembly is arranged in the housing 1, fixing assemblies are respectively arranged on two opposite ends of the silencing assembly, and the silencing assembly is fixed in the housing 1 by being straightened through the fixing assemblies.

As shown in fig. 5, when the single-sided nap structure is adopted, the nap surfaces face the inner wall of the casing 1.

The housing 1 adopts a perforated plate with meshes to prevent dust from entering the interior thereof; the fluff is suitable for absorbing middle and high frequency noise, and a tight base layer can cause vibration and eliminate acoustic energy when low frequency noise penetrates through the base layer; when the multilayer silencing film with fluff on both sides is adopted, a relatively closed air layer can be formed between every two silencing films, and after sound energy passes through the air layer, resonance is caused and additional gain is generated for centering and low-frequency noise reduction.

As shown in fig. 1, a gap between the muffler assembly and the housing 1 is filled with a sound absorbing material 8 to ensure a sound absorbing effect, and the sound absorbing material 8 may be porous sound absorbing cotton, rock wool, mineral wool, or the like.

As shown in fig. 2 and 3, the fixing component comprises an embedded fixing seat 3, a plurality of bolts 7, nuts 6, clamping blocks 5 and pressing sheets 4, wherein the clamping blocks 5 are arranged between two adjacent layers of sound-absorbing films 2, the two adjacent silencing films are arranged at equal intervals, the pressing sheet 4 is arranged outside the two outermost silencing films 2, the pressing sheet 4 and the clamping block 5 are oppositely arranged and are respectively arranged at two opposite ends of the silencing films 2, through holes are respectively arranged at two opposite ends of the pressing sheet 4, the clamping block 5 and the silencing films 2, a bolt 7 passes through the through holes on the pressing sheet 4, the clamping block 5 and the silencing films 2, then two ends are connected through a nut 6 by screw threads, the multilayer silencing films 2 are clamped and fixed, and the straightening in the horizontal direction is realized, and fixed in embedded fixing base 3 through bolt 7, embedded fixing base 3 is fixed respectively at the relative both ends of shell 1, is taut to be fixed in shell 1 with the noise elimination subassembly.

As shown in fig. 3, a tensioning adjusting mechanism is arranged on one of the embedded fixing seats 3, the tensioning adjusting mechanism includes at least one adjusting screw 11, a screw hole 12 is arranged on the embedded fixing seat 3, and the adjusting screw 11 passes through the side surface of the housing 1 and then is in threaded connection with the screw hole 12.

As shown in fig. 6, the embedded fixing base 3 is n-shaped, and includes two opposite side arms 31 and a connecting arm 34, the side arm 31 has four sides, which are a first side, a second side, a third side and a fourth side, respectively, wherein the first side is opposite to the third side, the second side is opposite to the fourth side, the first side is connected to the connecting arm 34, the side arm 31 is provided with a connecting hole 32, two ends of the bolt 7 are inserted into the connecting hole 32, and the embedded fixing base 3 can be fixed in the housing 1 by welding or screw connection.

For the convenience of installation, embedded fixing base 3 can be formed by welding two L-shaped pieces with the same structure with each other.

As shown in fig. 1, in the present invention, the housing 1 is composed of two perforated plates 9 having meshes and two fixing plates 10, the fluff surface of the sound absorption member is opposed to the perforated plates 9, and the embedded holders 3 are fixed to the fixing plates 10.

As shown in fig. 7, a notch 33 is provided on the side arm 31 of at least one of the two embedded holders 3, the notch 33 is communicated with the connecting hole 32, as can be seen from the figure, the width of the notch 33 is smaller than the aperture of the connecting hole 32, and one edge of the notch 33 is aligned with the edge of the connecting hole 32.

In the present invention, the embedded fixing seats 3 may adopt two structures as shown in fig. 6 and 7, that is, the embedded fixing seat 3 shown in fig. 7 is adopted as the one embedded fixing seat 3 having the tension adjusting mechanism, and the embedded fixing seat 3 shown in fig. 6 is adopted as the other embedded fixing seat 3, but the present invention is not limited thereto, and the embedded fixing seats shown in fig. 7 may be adopted as both the embedded fixing seats 3.

In the present invention, the notch 33 is disposed on the second side or the fourth side, so that the bolt 7 will not be released from the connecting hole 32 after the embedded fixing base 3 is fixed on the fixing plate 10.

In the utility model, four embedded fixing seats 3 in the silencing sheet can be arranged, two embedded fixing seats are correspondingly arranged on the front end and the rear end of the upper side and the lower side of the silencing component in pairs and are connected with bolts 7 positioned at opposite positions, and the tensioning adjusting mechanism is arranged on the two embedded fixing seats 3 positioned at the lower side.

In the utility model, the clamping block 5 can be a columnar structure, the section of the clamping block is rectangular, and the pressing sheet 4 is a strip-shaped structure, and the thickness of the pressing sheet is smaller than that of the clamping block 5. The clamping blocks 5 and the pressing sheets 4 can be made of non-metal materials, the embedded fixing seats 3 can be made of sheet metal parts, casting parts or mold opening parts, the materials are metal or non-metal materials, and when the materials are metal materials, the materials can be stainless steel plates, aluminum plates, low-carbon steel plates, galvanized steel plates, copper plates, titanium plates and the like; when the material is a non-metal material, the material can be acrylic, graphite, polytetrafluoroethylene plastic and the like.

As shown in fig. 8, 9, 10 and 11, the present invention further discloses a muffler, which includes a plurality of the above-mentioned muffling sheets 100, wherein the muffling sheets 100 are arranged in an array, the structure of the muffling sheets 100 has been described in detail in the foregoing, and is not described herein again, and the muffling sheets 100 are fixed in the housing 200 through a bracket.

As shown in fig. 8 and 9, the sound-absorbing sheets 100 are vertically arranged and are horizontally arranged at equal intervals in a conventional manner.

As shown in fig. 10 and 11, on the basis of the above arrangement, grooves 201 are further provided on the left and right sides of the housing 200, and the sound attenuation modules of the present invention may be provided in the grooves 201.

The utility model can effectively reduce or eliminate the noise caused by industrial equipment, and can lighten the silencer, thereby improving the acoustic performance and the service performance of the silencer and being suitable for more practical occasions and different types of silencers.

Claims (9)

1. A muffler assembly, characterized by: comprises at least one layer of sound attenuation film (2), wherein the sound attenuation film (2) comprises a base layer (21) and piles (22) arranged on the surfaces of two sides of the base layer (21).

2. The muffling assembly of claim 1, wherein: the fluff (22) is made of animal fibers, vegetable fibers, chemical fibers, glass fibers or mineral fibers.

3. An anechoic sheet comprising a case (1) having a mesh, a wind deflector (13), characterized in that: the housing (1) is provided with a sound-damping assembly according to any one of claims 1-2, and fixing assemblies are respectively arranged at two opposite ends of the sound-damping assembly, and the sound-damping assembly is fixed in the housing (1) by being straightened through the fixing assemblies.

4. The anechoic sheet according to claim 3, wherein: and a gap between the sound attenuation component and the shell (1) is filled with a sound absorption material (8).

5. The anechoic sheet according to claim 4, wherein: the fixed component comprises an embedded fixing seat (3), a plurality of bolts (7), nuts (6), clamping blocks (5) and pressing sheets (4), wherein the clamping blocks (5) are arranged between two adjacent layers of silencing films (2), the pressing sheets (4) are arranged outside the two layers of silencing films (2) on the outermost sides, the pressing sheets (4) are arranged opposite to the clamping blocks (5) and are arranged at the two opposite ends of the silencing films (2), the bolts (7) penetrate through the pressing sheets (4), the clamping blocks (5) and the two rear ends of the silencing films (2) are connected through the nuts (6) in a threaded mode and are fixed in the embedded fixing seat (3), the embedded fixing seats (3) are fixed at the two opposite ends of the shell (1) respectively, and the silencing component is tensioned and fixed in the shell (1).

6. The anechoic sheet according to claim 5, wherein: be equipped with taut adjustment mechanism on one of them embedded fixing base (3), taut adjustment mechanism includes at least one adjusting screw (11), is equipped with screw (12) on embedded fixing base (3), and adjusting screw (11) pass behind this side of shell (1) and screw (12) threaded connection.

7. The anechoic sheet according to claim 6, wherein: the embedded fixing seat (3) is n-shaped and comprises two opposite side arms (31), connecting holes (32) are formed in the side arms (31), and two ends of the bolt (7) are inserted into the connecting holes (32).

8. The anechoic sheet according to claim 7, wherein: a gap (33) is arranged on a side arm (31) of at least one embedded fixed seat (3), and the gap (33) is communicated with the connecting hole (32).

9. A muffler characterized by: comprising a plurality of the muffling sheets according to any one of claims 3 to 8, the muffling sheets being arranged in an array.

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