CN201723508U

CN201723508U - High-voltage fan muffler

Info

Publication number: CN201723508U
Application number: CN2010202253261U
Authority: CN
Inventors: 李凡
Original assignee: Nantong Beite Environmental Protection Technology Co Ltd
Current assignee: Nantong Beite Environmental Protection Technology Co Ltd
Priority date: 2010-06-13
Filing date: 2010-06-13
Publication date: 2011-01-26
Anticipated expiration: 2020-06-13

Abstract

The utility model relates to a high-voltage fan muffler, which comprises a shell, wherein the shell has a hollow structure, a sound absorption layer is sleeved inside the shell, a surface protection layer is sleeved inside the sound absorption layer, the surface protection layer is a perforated plate, two sound absorption sheets placed up and down are transversely embedded in the surface protection layer, and the left and right ends of the shell are connected with transition bodies. The fan muffler has the advantages of simple structure, flexible use, good silencing effect and low pressure loss.

Description

The high pressure positive blower silencing apparatus

Technical field:

The utility model relates to a kind of silencing apparatus, particularly a kind of high pressure positive blower silencing apparatus.

Background technique:

Silencing apparatus is a kind of a kind of parts that stop sound transmission and allow air communication to cross, be the important measures of eliminating air power noise, silencing apparatus generally is installed on the air-flow path of aerodynamic force equipment or the device of the reduction noise in the inlet and exhaust system, and can stop the propagation of sound wave, allow passing through of air-flow, existing silencing apparatus is the effective tool of control noise.Present existing reactive muffler is that pipe and the chamber by abrupt interface combines, like an acoustic filter well, similar to electrical filter, the cell of each band pipe is a mesh of wave filter, air quality in the pipe is equivalent to inductance and the resistance on the electricity, volume of air in the cell is equivalent to the electric capacity on the electricity, similar with electrical filter, the cell of each band pipe all has the natural frequency of oneself, when the sound wave that includes various frequency contents enters first short tube, only near the sound wave of some frequency first mesh natural frequency could arrive second short tube mouth by mesh, the sound wave of other frequency then can not pass through mesh. can only in cell, come back reflective, make up by choosing suitable pipe and chamber, just can filter the noise of some frequency content, thereby reach the purpose of noise elimination, but this reactive muffler is applicable to the elimination low-frequency noise, for in, high frequency noise then effect is relatively poor, influences working environment.

Summary of the invention:

The purpose of this utility model is in order to overcome above deficiency, to provide a kind of simple in structure, selects for use flexibly, and it is effective to eliminate the noise, the high pressure positive blower silencing apparatus that the pressure loss is little.

The purpose of this utility model is achieved through the following technical solutions: a kind of high pressure positive blower silencing apparatus, comprise housing, housing is a hollow-core construction, be connected with absorbent treatment on the inwall of housing, be connected with armour layer on the inwall of absorbent treatment, the shape of armour layer and the shape of absorbent treatment are complementary, and armour layer is connected with two sound absorption plates of placing laterally and up and down, the rear and front end of each sound absorption plate is embedded in the armour layer, and the two ends, the left and right sides of housing all are connected with the transition body.

The utility model compared with prior art has the following advantages: absorbent treatment adopts super glass wool, like this when sound wave when being provided with the silencing apparatus of sound-absorbing material, sound wave will excite the vibration of the interior air molecule of countless apertures in the super glass wool, wherein a part of acoustic energy will be used to overcome surface friction drag and viscous force, be converted into heat energy, this silencing apparatus is not only simple in structure, selects for use flexibly, and it is effective to eliminate the noise, and the pressure loss is little.

Description of drawings:

Fig. 1 is the sectional view of the utility model structural representation;

Fig. 2 is that the A-A of Fig. 1 is to structural representation;

Number in the figure: 1-housing, 2-absorbent treatment, 3-armour layer, 4-sound absorption plate, 5-transition body.

Embodiment:

In order to deepen understanding of the present utility model, the utility model is described in further detail below in conjunction with embodiment and accompanying drawing, and this embodiment only is used to explain the utility model, does not constitute the qualification to the utility model protection domain.

Show the embodiment of a kind of high pressure positive blower silencing apparatus of the utility model as Fig. 1 and Fig. 2, comprise housing 1, housing 1 is a hollow-core construction, housing 1 is tetragonal body or cylindrical body, be connected with absorbent treatment 2 on the inwall of housing 1, be connected with armour layer 3 on the inwall of absorbent treatment 2, the shape of the shape of armour layer 3 and absorbent treatment 2 is complementary, armour layer 3 is connected with two sound absorption plates of placing laterally and up and down 4, the two ends of each sound absorption plate 4 are embedded in the armour layer 3, the two ends, the left and right sides of housing 1 all are connected with transition body 5, the two ends, the left and right sides of each sound absorption plate 4 are triangle, promptly when running into the triangle end face, one sound wave can be divided into the above sound wave of twice, reduced the frequency of original sound wave, make that sound wave energy is better absorbed, the two ends, the left and right sides of housing 1 all are connected with transition body 5, armour layer 3 is a perforated plate, absorbent treatment adopts super glass wool, utilize acoustic resistance to eliminate the noise, promptly when sound wave when being provided with the silencing apparatus of sound-absorbing material, sound wave will excite the vibration of the interior air molecule of countless apertures in the super glass wool, wherein a part of acoustic energy will be used to overcome surface friction drag and viscous force, be converted into heat energy, this silencing apparatus is not only simple in structure, select for use flexibly, and it is effective to eliminate the noise, and the pressure loss is little, is used to reduce centrifugal high pressure fan and advances, evacuating air power character noise, also can be used for reducing sealing machine room ventilated port and air channel, and the air power noise of boiler blower.

Claims

1. high pressure positive blower silencing apparatus, comprise housing (1), described housing (1) is a hollow-core construction, it is characterized in that: be connected with absorbent treatment (2) on the inwall of described housing (1), be connected with armour layer (3) on the inwall of described absorbent treatment (2), the shape of the shape of armour layer (3) and described absorbent treatment (2) is complementary, described armour layer (3) is connected with two sound absorption plates of placing laterally and up and down (4), the rear and front end of described each sound absorption plate (4) is embedded in the described armour layer (3), and the two ends, the left and right sides of described housing (1) all are connected with transition body (5).

2. according to the described a kind of high pressure positive blower silencing apparatus of claim 1, it is characterized in that: described armour layer (3) is a perforated plate.

3. according to the described a kind of high pressure positive blower silencing apparatus of claim 1, it is characterized in that: the two ends of each described sound absorption plate (4) are triangle.