CN218918443U

CN218918443U - Sheet type muffler

Info

Publication number: CN218918443U
Application number: CN202222992469.0U
Authority: CN
Inventors: 汪承磊; 吴亮
Original assignee: Shanghai Beiwei New Mstar Technology Ltd
Current assignee: Shanghai Beiwei New Mstar Technology Ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-04-25
Anticipated expiration: 2032-11-10

Abstract

The utility model discloses a sheet type muffler, which relates to the technical field of noise reduction and noise elimination, and comprises a muffler shell and a plurality of muffler sheets, wherein the interior of the muffler shell is hollow, two ends of the muffler shell are open, the muffler sheets are vertically arranged in the muffler shell at intervals so as to form a plurality of channels between the two ends of the muffler shell, and the muffler sheets comprise: the sound-absorbing material muffler comprises a shell, a plurality of partition boards and a sound-absorbing block, wherein the shell is hollow, the end faces of two sides of the shell are provided with a plurality of through holes, the partition boards are arranged on the inner side of the shell in a staggered mode to form a plurality of cabins capable of being matched with the embedded sound-absorbing block in the shell, and the sound-absorbing material muffler can effectively avoid the condition that the sound-absorbing effect is reduced due to extrusion deformation caused by the dead weight of the sound-absorbing material.

Description

Sheet type muffler

Technical Field

The utility model relates to the technical field of noise reduction and noise elimination, in particular to a sheet type muffler.

Background

A muffler is a device that allows airflow but prevents or reduces sound transmission and is an important measure for eliminating aerodynamic noise. The muffler is capable of blocking the propagation of sound waves, allowing the passage of air flow, and is an effective tool for controlling noise.

The muffler can be divided into three types of resistive mufflers, resistive mufflers and impedance composite mufflers according to the noise elimination principle and structure, wherein the resistive mufflers are most widely applied, and the sheet type mufflers are most widely applied in the resistive mufflers.

The existing sheet type muffler mainly fills sound absorbing materials in the muffler sheet to achieve the purpose of resistive muffling, the sound absorbing materials can sink along with the effect of gravity of the sound absorbing materials under the long-time placement, and particularly the sound absorbing materials positioned at the lower part in the muffler sheet can be extruded and deformed, so that the sound absorbing materials in the muffler sheet are unevenly distributed, and the muffling effect is affected.

Disclosure of Invention

In order to solve the technical problems existing in the background technology, the utility model provides a sheet type muffler, which comprises a muffler shell and a plurality of muffler sheets, wherein the inside of the muffler shell is hollow, two ends of the muffler shell are open, the plurality of muffler sheets are vertically arranged in the muffler shell at intervals so as to form a plurality of channels between the two ends of the muffler shell, and the muffler sheets comprise: the shell, a plurality of baffles, amortization piece, a plurality of through-holes have been seted up to the inside cavity of shell and its both sides terminal surface, the baffle staggered arrangement is used for forming a plurality of cabins that can adapt to inlay the amortization piece in the shell inside at the shell inboard.

As a further optimization of the above solution, the cabins are closely arranged in a honeycomb structure inside the housing.

As a further optimization of the scheme, the silencing block is formed by stacking two sound insulation pads, a plurality of penetrating holes are formed in the sound insulation pads along the horizontal direction, and the two sound insulation pads are arranged in a staggered mode so that the penetrating holes in the corresponding positions are communicated with each other, and the axes of the two sound insulation pads are located on different straight lines.

As a further optimization of the above, the penetrating holes are randomly staggered on the sound insulation pad.

As a further optimization of the scheme, the penetrating holes are horn-shaped, and the ends with smaller calibers are oppositely arranged towards each other.

As a further optimization of the above solution, the sound insulation pad is a viscoelastic damping material plate.

The beneficial effects are that:

1. according to the sheet type muffler provided by the utility model, the partition plates are arranged in the muffler sheets to separate a plurality of cabins, and the cabins are filled with the sound absorption blocks for sound absorption, so that the volume of sound absorption materials in a single cabin is reduced, and the situation that the sound absorption materials are extruded and deformed due to the dead weight of the sound absorption materials is avoided.

2. The plate type muffler provided by the utility model has the advantages that the honeycomb structure enables the space in the housing of the muffler plate to be utilized more fully, and the honeycomb structure has a certain sound insulation effect.

3. According to the sheet type muffler provided by the utility model, sound is continuously reflected in the penetrating holes, and the hole diameters of the penetrating holes are gradually changed, and the penetrating holes on the two sound insulation pads are staggered to form cavities with different diameters, so that the sound with different frequency bands can be absorbed, the sound absorption effect of the muffler sheet is not only dependent on the material, and the sound absorption performance is further improved.

Drawings

Fig. 1 is a schematic diagram of the overall structure of a sheet muffler according to the present utility model;

fig. 2 is a schematic diagram of the internal structure of a sound damping sheet of a sheet-type sound damper according to the present utility model;

fig. 3 is a schematic diagram of a silencing block of a sheet muffler according to the present utility model.

Wherein:

1. a muffler housing; 2. a sound damping sheet; 21. a housing; 211. a through hole; 22. a partition plate; 23. a sound attenuation block; 231. a sound insulation pad; 232. a penetrating hole; 3. a cabin.

Detailed Description

Example 1

The sheet type muffler according to this embodiment includes a muffler housing 1 and a plurality of muffler sheets 2 as shown in fig. 1 and 2, the muffler housing 1 has a hollow interior and two ends open, the muffler sheets 2 are vertically spaced inside the muffler housing 1 so that a plurality of channels through which air flows can flow are formed between the openings at the two ends of the muffler housing 1, and the muffler sheets 2 include: the sound-absorbing muffler comprises a shell 21, a plurality of partition plates 22 and a sound-absorbing block 23, wherein the shell 21 is hollow, the end faces of two sides of the shell are provided with a plurality of through holes 211, the partition plates 22 are arranged on the inner side of the shell 21 in a staggered mode to form a plurality of cabins 3 capable of being matched with the embedded sound-absorbing block 23, the partition plates 22 are arranged in the sound-absorbing sheets 2 to separate the cabins 3, and the cabins 3 are filled with the sound-absorbing block 23 for sound absorption, so that the volume of sound-absorbing materials in the single cabins 3 is reduced, and the situation that the sound-absorbing materials are extruded and deformed due to the dead weight of the sound-absorbing materials is avoided.

Example 2

As shown in fig. 1 to 3, the sheet type muffler provided in this embodiment includes a muffler shell 1 and a plurality of muffler sheets 2, wherein the interior of the muffler shell 1 is hollow and two ends of the muffler shell are open, and the plurality of muffler sheets 2 are vertically arranged in the muffler shell 1 at intervals so as to form a plurality of channels capable of flowing air flow between the two ends of the muffler shell 1;

the sound damping sheet 2 includes: the sound-absorbing device comprises a shell 21, a plurality of partition plates 22 and a sound-absorbing block 23, wherein the shell 21 is hollow, a plurality of through holes 211 are formed in the end faces of two sides of the shell 21, sound can easily enter the sound-absorbing sheet 2 to be absorbed, the partition plates 22 are arranged on the inner side of the shell 21 in a staggered mode to form a plurality of cabins 3 capable of being matched with the embedded sound-absorbing block 23 in the shell 21, furthermore, the cabins 3 are closely arranged in a honeycomb structure on the inner side of the shell 21, the honeycomb structure enables the space in the shell 21 to be fully utilized, and the honeycomb structure has a certain sound-absorbing effect;

the sound attenuation block 23 is formed by stacking two sound attenuation pads 231, the sound attenuation pads 231 are preferably viscoelastic damping material plates, the viscoelastic damping material has good attraction effect, a plurality of penetrating holes 232 which are randomly staggered are formed in the sound attenuation pads 231 along the horizontal direction, the penetrating holes 232 are horn-shaped, one ends with smaller calibers are oppositely arranged, the two sound attenuation pads 231 are arranged in a staggered mode so that the penetrating holes 232 at corresponding positions are communicated with each other and the axes are located on different straight lines, sound is continuously reflected in the penetrating holes 232, the aperture of the penetrating holes 232 is gradually changed, and the penetrating holes 232 on the two sound attenuation pads 231 are staggered with each other to form cavities with different diameters, so that sound in different frequency bands can be absorbed, the sound absorption effect of the sound attenuation pad 2 is not only dependent on the material, and the sound absorption performance is further improved.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a piece formula silencer, includes silencer casing (1) and a plurality of sound-damping piece (2), the inside cavity and the both ends opening of silencer casing (1), a plurality of sound-damping piece (2) vertical interval sets up in silencer casing (1) inside so that form a plurality of passageways between silencer casing (1) both ends opening, its characterized in that, sound-damping piece (2) include: the novel silencer comprises a shell (21), a plurality of partition boards (22) and silencing blocks (23), wherein the shell (21) is hollow, a plurality of through holes (211) are formed in the end faces of two sides of the shell, the partition boards (22) are arranged on the inner side of the shell (21) in a staggered mode, and a plurality of cabins (3) capable of being matched with the embedded silencing blocks (23) are formed in the shell (21).

2. A chip muffler according to claim 1, characterized in that the cabins (3) are closely arranged in a honeycomb structure inside the housing (21).

3. The sheet type muffler according to claim 1, wherein the muffler block (23) is formed by stacking two sound insulation pads (231), a plurality of penetrating holes (232) are formed in the sound insulation pads (231) along the horizontal direction, and the two sound insulation pads (231) are arranged in a staggered manner so that the penetrating holes (232) at corresponding positions are communicated with each other and the axes are located on different straight lines.

4. A sheet muffler as claimed in claim 3, characterized in that the penetrating holes (232) are randomly staggered on the sound insulating pad (231).

5. A sheet muffler as defined in claim 3, wherein the through hole (232) is horn-shaped and the smaller diameter end is disposed opposite to the smaller diameter end.

6. A sheet muffler as claimed in claim 3, characterized in that the sound insulating pad (231) is a sheet of viscoelastic damping material.