CN211449209U

CN211449209U - Novel impedance combined type silencer

Info

Publication number: CN211449209U
Application number: CN201922099277.5U
Authority: CN
Inventors: 李敏佳; 李宇森
Original assignee: Hunan Zero Acoustics Technology Co ltd
Current assignee: Hunan Zero Acoustics Technology Co ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-09-08
Anticipated expiration: 2029-11-29

Abstract

The utility model discloses a novel impedance combined type silencer, including the shell, the equal fixed mounting in both ends of shell has the flange, and fixed mounting has the first board of making an uproar and the second board of making an uproar on the inner wall of flange, and the first board of making an uproar is provided with first through-hole, and the second is made an uproar of making an uproar and is provided with the second through-hole on the board, and. The amortization is cotton better to well high frequency sound absorption effect, but is not obvious to the low frequency effect, and the board of making an uproar that falls that has the through-hole then the sound absorption frequency band is very wide, can make sound absorption peak value move to the low frequency through rational design, and both are compound can be so that whole silencer realization is full to be eliminated the noise, simple structure, and is practical reliable.

Description

Novel impedance combined type silencer

Technical Field

The utility model relates to a composite muffler technical field specifically is a novel impedance combined type silencer.

Background

The fan is a driven fluid machine which increases the gas pressure and discharges the gas by means of the input mechanical energy, and blows air into the system, so that great noise is generated, the health of surrounding residents and workers is adversely affected, and the noise generated by the fan becomes one of the main objects for controlling noise pollution.

The silencer for the industrial fan in the market at present has the advantages of unreasonable structure, serious blockage, high wind speed, high regenerative noise and high flow resistance, increases system resistance, increases fan energy consumption, and is not ideal in silencing effect due to the fact that the working condition and the noise source frequency characteristic of the site are unknown, and development is not matched with the working condition and the noise source frequency characteristic of the site.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel impedance combined type silencer to the solution is not enough to prior art, provides a reasonable in design, falls effectual impedance combined type fan silencer.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel impedance combined type silencer, includes the shell, the equal fixed mounting in both ends of shell has the flange, fixed mounting has the first board of making an uproar and the second board of making an uproar on the inner wall of flange, be provided with first through-hole on the first board of making an uproar, be provided with the second through-hole on the board of making an uproar of second, fixed mounting has the baffle in the shell, the baffle intussuseption is.

Preferably, the thickness of the first noise reduction plate and the thickness of the second noise reduction plate 14 are both 0.75 mm.

Preferably, the aperture of the first through hole and the aperture of the second through hole 15 are both 0.8 mm.

Preferably, the first through-hole has a penetration rate of 1%.

Preferably, the second through-hole has a penetration rate of 2%.

Preferably, the density of the sound attenuation cotton is 48kg/m_3。

Preferably, the third through-hole has a penetration rate of 20% to 30%.

Compared with the prior art, the beneficial effects of the utility model are that: the amortization is cotton better to well high frequency sound absorption effect, but is not obvious to the low frequency effect, and the board of making an uproar that falls that has the through-hole then the sound absorption frequency band is very wide, can make sound absorption peak value move to the low frequency through rational design, and both are compound can be so that whole silencer realization is full to be eliminated the noise, simple structure, and is practical reliable.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic diagram of a first noise reduction plate;

fig. 3 is a schematic diagram of a second noise reduction plate panel of the present invention;

fig. 4 is a schematic view of the partition board surface of the present invention.

In the figure: 1. a housing; 11. a flange; 12. a first noise reduction plate; 13. a first through hole; 14. a second noise reduction plate; 15. a second through hole; 16. a partition plate; 17. silencing cotton; 18. a third via.

Detailed Description

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, the present invention provides a technical solution: the utility model provides a novel impedance combined type silencer, which comprises an outer shell 1, shell 1 is galvanized iron, the equal fixed mounting in both ends of shell 1 has flange 11, fixed mounting has first board 12 and the second of making an uproar to fall on the inner wall of flange 11 and falls board 14, it is provided with first through-hole 13 on the board 12 to fall first, it is provided with second through-hole 15 on the board 14 to fall the second of making an uproar, fixed mounting has baffle 16 in the shell 1, baffle 16 is the galvanized steel sheet, the quantity of baffle 16 is three, and the interval equals between adjacent, 16 intussuseptions of baffle are filled with amortization cotton 17, all pass third through.

Referring to fig. 1, the thickness of the first noise reduction plate 12 and the thickness of the second noise reduction plate 14 are both 0.75mm, the sound absorption band is wide, and the distance between the first noise reduction plate 12 and the second noise reduction plate 14 is 80 mm.

Referring to fig. 1, the aperture of the first through hole 13 and the aperture of the second through hole 15 are both 0.8 mm.

Referring to fig. 1, the first through hole 13 has a punching rate of 1%.

Referring to fig. 1, the second through hole 15 has a punching rate of 2%.

Referring to FIG. 1, the density of the sound-deadening cotton 17 is 48kg/m₃For inThe high-frequency sound absorption effect is better.

Referring to fig. 1, the third through hole 18 has a perforation rate of 20% to 30% and a hole diameter of 4mm to 6 mm.

The utility model discloses when concrete implementation: the amortization is cotton 17 better to being in medium and high frequency sound absorption effect, but is not obvious to the low frequency effect, and the first board 12 of making an uproar and the second board 14 cooperation second through-hole 15 of making an uproar fall of cooperation for to noise sound absorption frequency band widen, can make sound absorption peak value move to the low frequency through rational design, both are compound can make whole silencer realize full frequency noise elimination, the baffle 16 through three equidistance distribution can improve the sound absorption and fall the effect of making an uproar.

Claims

1. A novel impedance combined type silencer comprises a shell (1), and is characterized in that: the utility model discloses a noise reduction device, including shell (1), the equal fixed mounting in both ends of shell (1) has flange (11), fixed mounting has on the inner wall of flange (11) first fall board (12) of making an uproar and the second fall board (14) of making an uproar, be provided with first through-hole (13) on the first board (12) of making an uproar of making an.

2. The novel impedance compound muffler of claim 1, wherein: the thickness of the first noise reduction plate (12) and the thickness of the second noise reduction plate (14) are both 0.75 mm.

3. The novel impedance compound muffler of claim 1, wherein: the aperture of the first through hole (13) and the aperture of the second through hole (15) are both 0.8 mm.

4. The novel impedance compound muffler of claim 1, wherein: the first through hole (13) has a piercing rate of 1%.

5. The novel impedance compound muffler of claim 1, wherein: the second through hole (15) has a piercing rate of 2%.

6. The novel impedance compound muffler of claim 1, wherein: the density of the sound attenuation cotton (17) is 48kg/m³。

7. The novel impedance compound muffler of claim 1, wherein: the third through-hole (18) has a penetration rate of 20% to 30%.