CN216158577U

CN216158577U - Fancy variant noise elimination core body for circular resistive muffler

Info

Publication number: CN216158577U
Application number: CN202122295580.XU
Authority: CN
Inventors: 谭志华
Original assignee: Shenzhen Zhongya Electromechanical Industrial Co ltd
Current assignee: Shenzhen Zhongya Electromechanical Industrial Co ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-04-01
Anticipated expiration: 2031-09-23

Abstract

The utility model discloses a fancy variant noise elimination core body for a circular resistive muffler, which comprises a cylinder shell and an inner cylinder body arranged at the inner side of the cylinder shell, wherein sound absorption filler is filled in an interlayer at one side opposite to the cylinder shell and the inner cylinder body, core body fixing mechanisms are fixedly welded at the upper side and the lower side of the inner cylinder body, a main core body is welded at the middle part of each core body fixing mechanism, a plurality of noise elimination sheets are arranged at the outer end of the main core body, an airflow channel is formed among the inner cylinder body, the main core body and the plurality of noise elimination sheets, an air inlet channel is arranged at the lower end of the cylinder shell, an exhaust channel is arranged at the upper end of the cylinder shell, a flow guide cover is fixedly welded at the lower end of the main core body, and a tail cone is fixedly welded at the upper end of the main core body. And meanwhile, the high-speed airflow can smoothly enter the silencer.

Description

Fancy variant noise elimination core body for circular resistive muffler

Technical Field

The utility model belongs to the technical field of muffler core body structures, and particularly relates to a fancy variant muffler core body for a circular resistive muffler.

Background

The silencer is used for the airflow pipeline with noise transmission, and can attenuate or reflect the noise in the pipeline by using noise reduction devices such as pipelines and elbows with sound absorption linings or pipelines with suddenly changed sectional areas and other discontinuous acoustic impedances. At present, a silencer with a single-core structure is most applied, and is a silencing structure formed by filling a porous sound absorption material between an inner cylinder body and an outer shell of the silencer as a silencing source material and a single sound absorption core body.

Although the noise elimination structure is simple in structure, convenient to design and manufacture and good in pneumatic performance, the acoustic performance is poor, the sound absorption circumference is short, the high-frequency phenomenon occurs, the resistance is large, the noise reduction effect under the working condition of large noise is poor, the application range is still limited, and therefore the fancy variant noise elimination core body for the circular resistive muffler is provided to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: in order to solve the above-mentioned proposed problems, a fancy variant sound attenuating core for a circular resistive muffler is provided.

The technical scheme adopted by the utility model is as follows: the utility model provides a fancy variant noise elimination core for circular resistive muffler, includes barrel casing and sets up the interior barrel in barrel casing inboard, the relative one side intermediate layer intussuseption of barrel casing and interior barrel is filled with the sound absorption filler, the upper and lower both sides welded fastening of interior barrel has core fixed establishment, core fixed establishment's middle part welded mounting has main core, the outer end of main core is provided with a plurality of noise elimination pieces, be formed with airflow channel between interior barrel and the main core and a plurality of noise elimination piece, inlet channel has been seted up to the lower extreme of barrel casing, exhaust passage has been seted up to the upper end of barrel casing, the lower extreme welded fastening of main core has the kuppe, the upper end welded fastening of main core has the tail cone.

In a preferred embodiment, the cylinder housing, the inner cylinder and the sound absorbing filler are integrally formed into a sound absorbing housing of the sound absorber, and the main core and the plurality of sound absorbing sheets are integrally formed into a fancy variant sound absorbing core.

In a preferred embodiment, the silencing sheet uniformly surrounds the outer end of the main core body, the outer diameter of the main core body is 300-2000 mm, the cross section of the silencing sheet is in a fan shape, the cross section length of a circular arc on the short side of the silencing sheet is 20-150 mm, the cross section length of a circular arc on the long side of the silencing sheet is 40-300 mm, and the gap between the silencing sheet and the inner cylinder body is 10-50 mm.

In a preferred embodiment, the distance between every two of the silencing pieces is 10-30 mm, the number of the silencing pieces is 2-8, the silencing pieces can be in an oblique angle shape, a hemispherical shape and a triangular conical shape, the air guide sleeve can be in a hemispherical shape and a conical shape, and the main core body and the silencing pieces are welded and fixed integrally or connected through a core body fixing mechanism.

In a preferred embodiment, the barrel casing is sound absorption shell or rigid shell, the barrel casing is corrosion resistant plate, aluminum plate, low carbon steel board, galvanized steel sheet, metal such as copper and titanium board, the thickness of barrel casing is 0.8 ~ 1.5mm, the sound absorption filler is high temperature resistant porous sound absorption filler, the sound absorption filler can be glass wool, slag wool, rock wool, microbore brick and granularity slay sound absorption brick etc. be equipped with high temperature non-woven fabrics on interior barrel and the sound absorption filler.

In a preferred embodiment, the inner cylinder and the silencing sheet are both made of a metal perforated plate, and the main core is composed of a sound-absorbing filler, a high-temperature non-woven fabric and a perforated protective panel.

In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:

1. in the utility model, under the action of noise and airflow alternating noise generated by high-speed airflow in the flowing process, under the action of the fancy variant noise elimination core formed by the noise elimination sheet and the main core in the silencer and the sound absorption filler between the inner cylinder and the outer cylinder shell, the noise is eliminated or degraded to the noise reduction amount meeting a certain index, so that the whole device has the function of effectively preventing or reducing the influence of the noise generated at high speed on the outside, and simultaneously, the high-speed airflow can smoothly enter the silencer, thereby realizing the functions of increasing the sound absorption perimeter and avoiding high-frequency short circuit, and having practical significance of convenient application and production and manufacture.

Drawings

FIG. 1 is a schematic cross-sectional structural view of the present invention in its entirety;

FIG. 2 is a schematic top view of various arrangements of the noise damping sheet of the present invention;

FIG. 3 is a partial perspective structural view of various pod constructions and noise damping sheet combinations in accordance with the present invention;

fig. 4 is a schematic top view of the main core and the plurality of muffling sheets of the present invention.

The labels in the figure are: 1-cylinder shell, 2-sound absorption filler, 3-inner cylinder, 4-airflow channel, 5-core fixing mechanism, 6-main core, 7-silencing sheet, 8-air guide sleeve, 9-air inlet channel, 10-tail cone and 11-exhaust channel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Referring to fig. 1-4, a fancy variant noise elimination core body for a circular resistive muffler comprises a cylinder shell 1 and an inner cylinder 3 arranged at the inner side of the cylinder shell 1, sound absorption filler 2 is filled in an interlayer at one side opposite to the cylinder shell 1 and the inner cylinder 3, core body fixing mechanisms 5 are welded and fixed at the upper side and the lower side of the inner cylinder 3, a main core body 6 is welded and installed at the middle part of the core body fixing mechanism 5, a plurality of noise elimination sheets 7 are arranged at the outer end of the main core body 6, noise reduction treatment can be carried out on inflowing air flow through the noise elimination sheets 7, an air flow channel 4 is formed between the inner cylinder 3 and the main core body 6 as well as the plurality of noise elimination sheets 7, an air inlet channel 9 is arranged at the lower end of the cylinder shell 1, received high-speed air flow can be guided into the air flow channel 4 through the air inlet channel 9, an air outlet channel 11 is arranged at the upper end of the cylinder shell 1, and a flow guide cover 8 is welded and fixed at the lower end of the main core body 6, under the guidance of the guide cover 8 and the silencing sheet 7 of the main core body 4, airflow is divided to enter the airflow channel 4, the airflow moves forwards along the airflow channel 4, finally enters the exhaust channel 11 end of the silencer to form confluence, the high-speed airflow is discharged out of the silencer together, and the upper end of the main core body 6 is fixedly welded with a tail cone 10.

It should be noted that, the cylinder outer shell 1, the inner cylinder 3 and the sound absorption filler 2 integrally form a sound absorption outer shell of the sound absorber, the main core 6 and the plurality of noise reduction sheets 7 integrally form a fancy variant noise reduction core, noise and airflow alternating current noise generated in the flowing process of high-speed airflow are eliminated or degraded to noise reduction amount meeting a certain index under the action of the fancy variant noise reduction core formed by the noise reduction sheets 7 and the main core 6 in the noise absorber and the sound absorption filler 9 between the inner cylinder 3 and the cylinder outer shell 1.

It should be noted that the muffling sheets 7 surround the outer end of the main core 6 uniformly, the outer diameter of the main core 6 is 300-2000 mm, the cross section of the muffling sheet 7 is in a fan shape, the cross section of the arc on the short side of the muffling sheet 7 is 20-150 mm, the cross section of the arc on the long side of the muffling sheet 7 is 40-300 mm, the gap between the muffling sheet 7 and the inner cylinder 3 is 10-50 mm, under the condition of a certain flow area, a plurality of muffling sheets are uniformly and annularly arranged, uniform gaps are reserved, the sound absorption circumference is increased, high-frequency short circuit is avoided, the sound absorption performance is improved, gaps are reserved between the muffling sheets and the inner cylinder, resistance can be reduced, and air flow enters the central area close to the muffler.

It should be noted that, the distance between every two noise reduction sheets 7 is 10-30 mm, the number of the noise reduction sheets 7 is 2-8, the noise reduction sheets 7 can be in the shapes of an oblique angle, a hemisphere and a triangular cone, the air guide sleeve 8 can be in the shapes of a hemisphere and a cone, the main core body 6 and the noise reduction sheets 7 are welded and fixed integrally or the main core body 6 and the noise reduction sheets 7 are connected through the core body fixing mechanism 5, when the main core body 6 and the noise reduction sheets 7 are connected integrally, the air guide sleeve can be applied to the condition of high wind speed, the high-speed air flow can be resisted with enough strength, the resistance can be reduced, the air flow enters the central area closer to the silencer, the noise reduction sheets 7 and the air guide sleeve 8 can be matched with the main core body, the uniform arrangement is realized, uniform gaps are formed, the sound absorption perimeter is increased, and a certain flow guide effect is realized.

It should be noted that, the cylinder housing 1 is a sound absorption housing or a rigid housing, the cylinder housing 1 is a stainless steel plate, an aluminum plate, a low-carbon steel plate, a galvanized steel plate, metals such as a copper plate and a titanium plate, the thickness of the cylinder housing 1 is 0.8-1.5 mm, the sound absorption filler 2 is a high-temperature resistant porous sound absorption filler, the sound absorption filler 2 can be glass wool, slag wool, rock wool, a microporous brick, a granular slag sound absorption brick and the like, so that the sound absorption effect on the air flow can be ensured, the noise reduction effect is improved, the inner cylinder 3 and the sound absorption filler 2 are provided with high-temperature non-woven fabrics, and the high-temperature non-woven fabrics can be used for preventing air flow ash from entering the porous sound absorption filler.

It should be noted that, the inner cylinder 3 and the noise reduction sheet 7 are both made of a metal perforated plate, and the main core 6 is composed of a sound absorption filler, a high-temperature non-woven fabric and a perforated protective panel, so that the fancy variant noise reduction core formed by the noise reduction sheet 7 and the main core 6 in the muffler can absorb noise generated by air flow, and the noise reduction effect can be realized.

The working principle is as follows: when the device is used, when air flow flows from bottom to top, when high-speed air flow enters an air inlet channel 9 on the silencer, the air flow is divided and enters the air flow channel 4 under the guidance of a flow guide cover 8 and a silencing sheet 7 of a main core body 4, the air flow advances along the air flow channel 4 and finally enters an exhaust channel 11 end of the silencer to form confluence, and the high-speed air flow is exhausted out of the silencer together.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A fancy variant noise elimination core body for a circular resistive muffler comprises a cylinder shell (1) and an inner cylinder (3) arranged on the inner side of the cylinder shell (1), and is characterized in that: the utility model discloses a noise absorption and noise reduction barrel, including barrel shell (1), barrel shell (3), inner tube (3) and inner tube (3), the upper and lower both sides welded fastening of inner tube has core fixed establishment (5), the middle part welded mounting of core fixed establishment (5) has main core (6), the outer end of main core (6) is provided with a plurality of noise damping piece (7), be formed with air current channel (4) between inner tube (3) and main core (6) and a plurality of noise damping piece (7), inlet channel (9) have been seted up to the lower extreme of barrel shell (1), exhaust passage (11) have been seted up to the upper end of barrel shell (1), the lower extreme welded fastening of main core (6) has kuppe (8), the upper end welded fastening of main core (6) has tail cone (10).

2. A fancy variant acoustic core for a circular resistive muffler, as defined in claim 1, wherein: the shell (1), the inner cylinder (3) and the sound absorption filler (2) integrally form a sound absorption shell of the sound absorber, and the main core body (6) and the plurality of sound absorption sheets (7) integrally form a fancy variant sound absorption core body.

3. A fancy variant acoustic core for a circular resistive muffler, as defined in claim 1, wherein: the silencer is characterized in that the silencing sheet (7) uniformly surrounds the outer end of the main core body (6), the outer diameter of the main core body (6) is 300-2000 mm, the section of the silencing sheet (7) is in a fan-shaped shape, the section length of a circular arc on the short side of the silencing sheet (7) is 20-150 mm, the section length of a circular arc on the long side of the silencing sheet (7) is 40-300 mm, and the gap between the silencing sheet (7) and the inner cylinder body (3) is 10-50 mm.

4. A fancy variant acoustic core for a circular resistive muffler, as defined in claim 1, wherein: the utility model discloses a silencer, including silencing piece (7), kuppe (8), main core (6) and silencing piece (7) be as an organic whole welded fastening or be connected through core fixed establishment (5) between main core (6) and silencing piece (7), the interval between two liang of silencing piece (7) is 10 ~ 30mm, the quantity of silencing piece (7) is 2 ~ 8, silencing piece (7) can be bevel shape, hemisphere and the conical shape of triangle, kuppe (8) can be hemisphere and conical shape, main core (6) and silencing piece (7) are welded fastening as an organic whole or are connected through core fixed establishment (5) between main core (6) and silencing piece (7).

5. A fancy variant acoustic core for a circular resistive muffler, as defined in claim 1, wherein: the utility model discloses a sound absorption filter, including barrel casing (1), barrel casing (1) is sound absorption shell or rigid housing, barrel casing (1) is corrosion resistant plate, aluminum plate, mild steel plate, galvanized steel sheet, metals such as copper and titanium plate, the thickness of barrel casing (1) is 0.8 ~ 1.5mm, sound absorption filler (2) are high temperature resistant porous sound absorption filler, sound absorption filler (2) can be glass wool, slag wool, rock wool, micro-porous brick and granular slag sound absorption brick etc. be equipped with high temperature non-woven fabrics on barrel (3) and sound absorption filler (2) in.

6. A fancy variant acoustic core for a circular resistive muffler, as defined in claim 1, wherein: the inner cylinder (3) and the silencing sheet (7) are both made of metal perforated plates, and the main core body (6) is composed of sound-absorbing fillers, high-temperature non-woven fabrics and perforated protective panels.