CN201574802U - Silencer - Google Patents
Silencer Download PDFInfo
- Publication number
- CN201574802U CN201574802U CN2009202984118U CN200920298411U CN201574802U CN 201574802 U CN201574802 U CN 201574802U CN 2009202984118 U CN2009202984118 U CN 2009202984118U CN 200920298411 U CN200920298411 U CN 200920298411U CN 201574802 U CN201574802 U CN 201574802U
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- silencer
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- silencing
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Abstract
The utility model discloses a silencer, which comprises a silencer casing and a plurality of silencing units. The silencer casing is sleeved on an air pipe of a fan, and the plurality of silencing units are evenly arranged inside the casing and respectively formed by a metal cover and acoustic absorbing material filled inside the metal cover. Each of the metal covers of the plurality of silencing units are formed by combining two sections with different cross section widths, and wide sections and narrow sections of two adjacent metal covers are in stagger arrangement. A metal cover end portion of the silencing unit, close to the air pipe of the fan, is in a conical structure. The silencer has the advantages that a zigzag air flow passage inside the silencer realizes variable section diffusion of sound energy, and when air flow passes through the passage, partial dynamic pressure is converted into static pressure, thereby reducing resistance loss, lowering noise and realizing purposes of noise reduction and energy conservation. Compared with normal sound flow resistant type silencers, the silencer further has functions of heat concentration, sound insulation, heat dissipation and the like, and increases sound reduction by about 15%.
Description
Technical field
The utility model relates to the silencing apparatus of the elimination fan noise of industries uses such as electric power, mine, machinery, metallurgy, chemical industry.
Background technique
Silencing apparatus is to stop sound transmission and a kind of device of allowing air communication to cross, is the important measures of eliminating air power noise.Silencing apparatus mainly is to utilize sound-absorbing material to come mute, sound-absorbing material is fixed in the pipeline of airflow, and when sound wave entered, most of acoustic energy was absorbed, and played the noise elimination effect, and special centering low-frequency sound wave has outstanding noise elimination effect.Because the production of industries such as electric power, mine, machinery, metallurgy, chemical industry all be unable to do without blower fan, the noise of the on-stream generation of blower fan usually becomes influences the misfortune of workers ' health and interference environment source, be that Industry Branch is administered one of main object of noise pollution in recent years, so silencing apparatus is the indispensable accessory in blower fan air outlet tube place.Common silencing apparatus is because front and rear part, the noise elimination unit sectional shape that internal arrangement is provided with is identical, and the air-flow path between the two noise elimination unit is straight, so the noise elimination effect is short of to some extent.
The model utility content
The purpose of this utility model is to provide a kind of enhancing noise elimination effect, thermal-arrest, sound insulation, the silencing apparatus that heat rejection function is stronger.
For achieving the above object, the utility model can be taked following technical proposals:
Silencing apparatus described in the utility model, comprise the suppressor case that is socketed on the blower fan airduct and uniform arrangement be arranged in the described housing by metal covering and fill a plurality of noise eliminations unit that the sound absorbing material in it is formed, the metal covering of described noise elimination unit is combined by different two sections of cross-sectional width, and the width section of adjacent two metal coverings is staggered.
Described metal covering end near noise elimination unit, blower fan airduct place is a conical structure.
The metal covering that advantage of the present utility model is to be arranged on noise elimination unit in the suppressor case is combined by different two sections of cross-sectional width, and the width section of adjacent two metal coverings is staggered; Air-flow path in the silencing apparatus forms tortuous shape like this, has realized the variable cross section diffusion of acoustic energy, when air communication is crossed passage, converts the part dynamic pressure to static pressure, has reduced drag losses, has reduced noise, has realized noise reduction and purpose of energy saving.Have more functions such as thermal-arrest, sound insulation, heat extraction than general impedance acoustic streaming type silencing apparatus.Through comparing, variable cross section dispersion type noise deadener described in the utility model can improve about 15% than the sound deadening capacity of general impedance acoustic streaming type silencing apparatus.
Selecting for use of silencing apparatus should be according to fire prevention, moistureproof, anticorrosion and cleanliness requirement, the spatial position of installing, noise source spectral characteristic, system's natural phonation decay, system airflow regenerated noise, variant factors such as authorized pressure loss are considered and are laid particular stress on to some extent according to actual conditions.General situation is: the sound deadening capacity of silencing apparatus is big more, and the pressure loss is big more; When sound deadening capacity was identical, if the pressure loss is more little, silencing apparatus took up space just big more.
The suitable wind speed of silencing apparatus is generally 6-8m/s, the highlyest should not surpass 12m/s, notes the pressure loss of silencing apparatus simultaneously.
Description of drawings
Fig. 1 is the structural representation of common silencing apparatus.
Fig. 2 is a structural representation of the present utility model.
Embodiment
As shown in Figure 1, the metal covering 2a front and rear part sectional shape of the noise elimination unit of general impedance acoustic streaming type silencing apparatus inside is identical, and the air-flow path between the two noise elimination unit is straight, so the noise elimination effect is short of to some extent.
As shown in Figure 2, silencing apparatus described in the utility model, comprise the suppressor case 1 that is socketed on the blower fan airduct and uniform arrangement be arranged in the described housing 1 by metal covering 2 and fill a plurality of noise eliminations unit that the sound absorbing material in it is formed, the metal covering 2 of described noise elimination unit is combined by different two sections of cross-sectional width, the width section of adjacent two metal coverings 2 is staggered, make air-flow path form tortuous shape, when air communication is crossed passage, can convert the part dynamic pressure to static pressure, reduced drag losses, reduce noise, realized noise reduction and purpose of energy saving; Middle part, noise elimination unit uses special technique to make it produce changes of section, reaches the medium and low frequency noise that sound absorption blower air inlet produces by increasing the sound absorption area.The end of the metal covering 2 of noise elimination unit, close blower fan airduct place is a conical structure, avoids the generation of eddy current, has reduced drag losses.
Claims (2)
1. silencing apparatus, comprise the suppressor case (1) that is socketed on the blower fan airduct and uniform arrangement be arranged in the described housing (1) by metal covering (2) and fill a plurality of noise eliminations unit that its interior sound absorbing material is formed, it is characterized in that: the metal covering (2) of described noise elimination unit is combined by different two sections of cross-sectional width, and the width section of adjacent two metal coverings (2) is staggered.
2. silencing apparatus according to claim 1 is characterized in that: described metal covering (2) end near noise elimination unit, blower fan airduct place is a conical structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202984118U CN201574802U (en) | 2009-12-31 | 2009-12-31 | Silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202984118U CN201574802U (en) | 2009-12-31 | 2009-12-31 | Silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201574802U true CN201574802U (en) | 2010-09-08 |
Family
ID=42694678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202984118U Expired - Fee Related CN201574802U (en) | 2009-12-31 | 2009-12-31 | Silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201574802U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455900A (en) * | 2014-11-28 | 2015-03-25 | 连云港正航电力节能技术有限公司 | Multifunctional composite pipe silencer |
| CN108831431A (en) * | 2018-08-29 | 2018-11-16 | 正升环境科技股份有限公司 | Full range spreads silencing apparatus and vent passages sound-attenuating system |
| CN109036366A (en) * | 2018-09-20 | 2018-12-18 | 郑州静邦噪声振动控制工程技术有限公司 | Array type silencer and its special-shaped muffling unit |
| CN111238021A (en) * | 2020-03-27 | 2020-06-05 | 河南静邦绿色声学板业有限公司 | Noise elimination structure and silencer |
| CN111561370A (en) * | 2020-05-06 | 2020-08-21 | 济南吉美乐电源技术有限公司 | Tooth-shaped labyrinth passage silencer |
-
2009
- 2009-12-31 CN CN2009202984118U patent/CN201574802U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455900A (en) * | 2014-11-28 | 2015-03-25 | 连云港正航电力节能技术有限公司 | Multifunctional composite pipe silencer |
| CN108831431A (en) * | 2018-08-29 | 2018-11-16 | 正升环境科技股份有限公司 | Full range spreads silencing apparatus and vent passages sound-attenuating system |
| CN109036366A (en) * | 2018-09-20 | 2018-12-18 | 郑州静邦噪声振动控制工程技术有限公司 | Array type silencer and its special-shaped muffling unit |
| CN111238021A (en) * | 2020-03-27 | 2020-06-05 | 河南静邦绿色声学板业有限公司 | Noise elimination structure and silencer |
| CN111561370A (en) * | 2020-05-06 | 2020-08-21 | 济南吉美乐电源技术有限公司 | Tooth-shaped labyrinth passage silencer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100908 Termination date: 20101231 |