CN210371082U

CN210371082U - Gradual change formula wide band exhaust muffler

Info

Publication number: CN210371082U
Application number: CN201920787721.XU
Authority: CN
Inventors: 刘伟锋; 杨文博; 苏万银
Original assignee: Shaanxi Gongda Fushan Science And Technology Engineering Co Ltd
Current assignee: Shaanxi Gongda Fushan Science And Technology Engineering Co Ltd
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-04-21
Anticipated expiration: 2029-05-29

Abstract

The utility model discloses a gradual change formula wide band exhaust muffler, including the muffler body, the inside of muffler body is equipped with the noise elimination passageway, be connected with sound absorbing material on the inner wall of noise elimination passageway, the one end of muffler body is connected with flange, the inside noise elimination cavity that is equipped with of one end of muffler body, the utility model discloses through converting sound energy into heat energy and other form energy, thereby reach the noise reduction effect, low to the coefficient of resistance of air current, gas pressure loss is little, the noise elimination frequency band is wide, can withstand temperature height, the wide application is managed in noise control such as boiler exhaust, air compressor machine exhaust and the exhaust noise control of each type large-scale power equipment, the application is wide, the gradual change formula wide band exhaust muffler that the market demand is big, the gradual change formula wide band exhaust noise elimination is applicable to the large-bore pipeline exhaust of exhaust bore 200mm-800mm, the muffling amount reaches 15-20dB (A), the pressure loss is less than 8 percent, and the muffling effect is obvious.

Description

Gradual change formula wide band exhaust muffler

Technical Field

The utility model relates to an exhaust silencer technical field specifically is a gradual change formula wide band exhaust silencer.

Background

The silencer is used for the airflow pipeline with noise transmission, and can attenuate or reflect the noise in the pipeline by using the pipeline and elbow with sound absorption lining or the noise reduction devices such as the pipeline with abrupt cross section and other discontinuous acoustic impedance. For example, air compressors inevitably generate more or less noise during operation. And the control of the noise of the air compressor is directly related to the noise of the whole machine product. Generally, a silencer is installed at an air inlet of an air compressor, but the existing silencer of the air compressor has a poor silencing effect, and therefore a gradual-change type broadband exhaust silencer is proposed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gradual change formula wide band exhaust silencer to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the gradual change type broadband exhaust muffler comprises a muffler body, wherein a muffling channel is arranged inside the muffler body, a sound absorbing material is connected to the inner wall of the muffling channel, one end of the muffler body is connected with a connecting flange, and a muffling cavity is arranged inside one end of the muffler body.

As a further optimization of the technical scheme, the silencing channel and the connecting flange are connected to the silencer body through riveting.

As a further optimization of the technical scheme, the outer wall and the frame of the silencer body are made of cold-pressed metal profiles.

As a further optimization of the technical scheme, the silencing channels are arranged in a plurality of groups, the outer circle of silencing channels are a plurality of cone silencing channels arranged in an array manner, the central silencing channel is arranged in a cylinder, through holes penetrate through the inner wall of the silencing channel, and the through holes are uniformly distributed on the inner wall.

As a further optimization of the technical scheme, the connecting flange and the silencing cavity are positioned at the same end of the silencer body.

As a further optimization of the technical scheme, the silencing channel is formed by rolling a metal plate with the thickness not less than 1 mm.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a turn into heat energy and other form energy with sound energy, thereby reach noise reduction effect, resistance coefficient to the air current is low, gas pressure loss is little, the noise elimination frequency band is wide, can be temperature resistant high, wide application in boiler exhaust, noise control such as air compressor machine exhaust and the exhaust noise control of each type large-scale power equipment, application area is wide, gradual change formula wide band exhaust silencer that the market demand is big, gradual change formula wide band exhaust noise elimination is applicable to the exhaust bore and exhausts at 200mm-800 mm's heavy-calibre pipeline, the noise elimination volume reaches 15-20dB (A), pressure loss is less than 8%, noise reduction effect is obvious.

Drawings

FIG. 1 is a schematic sectional view of the present invention;

fig. 2 is a schematic view of the end structure of the present invention.

In the figure: 1. a muffler body; 2. a sound-deadening channel; 3. a sound absorbing material; 4. a connecting flange; 5. the noise elimination cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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, unless otherwise specified, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", and the like, indicate orientations or state relationships based on the orientations or state relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that a designated mechanism or component must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a gradual change formula wide band exhaust silencer, includes silencer body 1, the inside of silencer body 1 is equipped with noise elimination passageway 2, be connected with sound absorbing material 3 on the inner wall of noise elimination passageway 2, the one end of silencer body 1 is connected with flange 4, the inside noise elimination cavity 5 that is equipped with of one end of silencer body 1, silencer urceolus and flange size are confirmed according to customer's requirement and on-the-spot actual conditions.

Specifically, the silencing channel 2 and the connecting flange 4 are connected to the silencer body 1 through riveting.

Specifically, the outer wall and the frame of the silencer body 1 are made of cold-pressed metal sections with the thickness not less than 2 mm.

Specifically, the noise elimination channels 2 are arranged in a plurality of groups, the noise elimination channels 2 in the outer circle are a plurality of cone noise elimination channels arranged in an array mode, the noise elimination channels 2 in the center are arranged in a cylinder mode, through holes penetrate through the inner wall of each noise elimination channel 2, the distribution rate of the through holes on the noise elimination channels 2 is greater than 20%, the through holes are uniformly distributed on the inner wall, and the noise elimination channels 2 on the outer side and the noise elimination channels 2 in the center form an included angle not greater than 15 degrees.

Specifically, the connecting flange 4 and the silencing cavity 5 are located at the same end of the silencer body 1.

Specifically, the silencing channel 2 is formed by rolling a metal plate with the thickness not less than 1 mm.

Specifically, when the silencer is used, the silencing cavity 5 is matched with the silencing channels 2 to be connected in series, the central silencing channel 2 is arranged in a cylinder, the outer circle of silencing channels 2 are a plurality of cone silencing channels arranged in an array mode, and the inner walls of the silencing channels 2 are arranged in an array mode. The inner walls of the silencing channel 2 and the silencing cavity 5 are perforated plates, the front section of the silencing channel 1 is provided with a flange which is used for connecting the silencing channel 1 with an equipment exhaust pipe, when gas passes through the silencing channel 2, the exhaust pressure is reduced due to the change of the cross section, when sound waves are transmitted to the silencing cavity 5 at the starting end of the silencing channel along the cone silencing channel 2, part of the sound waves are reflected into the cone silencing channel 2 due to the influence of resistance, most of the sound waves are transmitted along the center silencing channel 2 and around a plurality of cone silencing channels 2 which are arrayed around the center, the silencing channel 2 is a silencing device which utilizes the sound absorption effect of sound absorption materials, the sound waves are transmitted along the silencing channel 2 with the changed cross section area to cause the change of sound impedance, the reflection and the consumption of sound energy are generated, thereby the silencing purpose is achieved, because, therefore, the noise-absorbing device achieves the effects of converting and absorbing noise under various frequencies, and is suitable for eliminating exhaust noise with wider peak frequency.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a gradual change formula wide band exhaust muffler, includes muffler body (1), its characterized in that: the silencer is characterized in that a silencing channel (2) is arranged inside the silencer body (1), a sound absorbing material (3) is connected to the inner wall of the silencing channel (2), a connecting flange (4) is connected to one end of the silencer body (1), and a silencing cavity (5) is arranged inside one end of the silencer body (1).

2. The broadband gradual change exhaust muffler of claim 1, wherein: the silencing channel (2) and the connecting flange (4) are connected to the silencer body (1) through riveting.

3. The broadband gradual change exhaust muffler of claim 1, wherein: the outer wall and the frame of the silencer body (1) are made of cold-pressed metal sections with the thickness not less than 2 mm.

4. The broadband gradual change exhaust muffler of claim 1, wherein: the noise elimination channel (2) is arranged in a plurality of groups, the noise elimination channel (2) in the outer circle is a plurality of cone noise elimination channels arranged in an array mode, the noise elimination channel (2) in the center is arranged in a cylinder mode, through holes penetrate through the inner wall of the noise elimination channel (2), the distribution rate of the through holes on the noise elimination channel (2) is larger than 20%, the through holes are uniformly distributed on the inner wall, and the noise elimination channel (2) on the outer side and the noise elimination channel (2) in the center form an included angle not larger than 15 degrees.

5. The broadband gradual change exhaust muffler of claim 1, wherein: the connecting flange (4) and the silencing cavity (5) are positioned at the same end of the silencer body (1).

6. The broadband gradual change exhaust muffler of claim 1, wherein: the silencing channel (2) is formed by rolling a metal plate with the thickness not less than 1 mm.