CN202187960U - Impedance acoustic streaming blower muffler - Google Patents

Impedance acoustic streaming blower muffler Download PDF

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Publication number
CN202187960U
CN202187960U CN201120250760XU CN201120250760U CN202187960U CN 202187960 U CN202187960 U CN 202187960U CN 201120250760X U CN201120250760X U CN 201120250760XU CN 201120250760 U CN201120250760 U CN 201120250760U CN 202187960 U CN202187960 U CN 202187960U
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CN
China
Prior art keywords
blower fan
housing
silencing apparatus
impedance
flow pattern
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201120250760XU
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Chinese (zh)
Inventor
丘桂达
朱建源
杜世睿
朱卫华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
XIAMEN LANTIAN BIHAI INVESTMENT CO Ltd
Original Assignee
XIAMEN LANTIAN BIHAI INVESTMENT CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to CN201120250760XU priority Critical patent/CN202187960U/en
Application granted granted Critical
Publication of CN202187960U publication Critical patent/CN202187960U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses an impedance acoustic streaming blower muffler, which is arranged in an air outlet or an exhaust duct of the blower, and includes a hollow housing, wherein one end of the housing is an air inlet, while the other end thereof is the air outlet; a damping louver window is arranged at the air inlet; two arc flexible guide plates are arranged in the housing, one end of the guide plate is mutually fixed with one end of the other guide plate, and the other end of the guide plate and the other end of the other guide plate are symmetrically fixed on the left an the right sides of the inner wall of the housing, so as to form a muffling wedge; and a plurality of air guiding openings are arranged on the guide plate. The impedance acoustic streaming blower muffler can simultaneously suppress high, middle and low broadband noises, integrates the muffling properties of the resistance muffler and the impedance muffler, and has excellent muffling effect to the vibration acoustic wave.

Description

Impedance acoustic flow pattern blower fan silencing apparatus
Technical field
The utility model relates to silencer, is meant a kind of impedance acoustic flow pattern blower fan silencing apparatus especially.
Background technique
Blower fan is a kind of general machinery equipment, and usually said blower fan comprises ventilator, blower; Compressor and Roots blower; Centrifugal fan, rotary type blower fan, water ring type blower fan etc.; Its using scope is very wide, and the production of every profession and trades such as electric power, mine, machinery, metallurgy, chemical industry all be unable to do without blower fan.Industrial blower fan belongs to the equipment of running continuously.International Organization for Standardization is≤90 decibels to the noise standard of this kind equipment defined; The new standard of China is identical therewith; This also is industrial enterprise's continuous noise foundation up to standard; But under the situation that does not adopt noise countermeasure, the blower fan inlets and putlets of ventilation can reach 110~120 decibels to the noise that environment penetrated, and has substantially exceeded requirement up to standard.The noise of the on-stream generation of blower fan becomes influences the misfortune of workers ' health and interference environment source.Particularly be close to the blower fan in living area, the air power noise of its intake grill and the radiation of exhaust outlet institute, the principal element of befouling environment forms public hazards especially, is that Industry Branch is administered one of main object of noise pollution in recent years.
Be to eliminate the noise that blower fan produces, people understand usually in the exhaust outlet of blower fan or air-flow path increases silencing apparatus.Silencing apparatus can stop sound transmission and allow the air communication mistake, is the important measures of eliminating aerodynamic force property noise.
Existing silencing apparatus generally is divided into dissipative muffler and reactive muffler.Dissipative muffler is a sound absorption of utilizing muffler material or sound absorption structure, makes along the noise of pipe transmmision to decay with distance, thereby reaches the noise elimination purpose, and this type silencing apparatus has good noise elimination effect to high-frequency noise, and the low frequency acoustic attenuation performance is relatively poor.Reactive muffler is that unexpected expansion (or shrink) or the side by means of pipeline section connects resonant cavity, makes along the sound wave of some frequency of pipe transmmision to reflect back to Sounnd source direction in sudden change place, thereby reaches the noise elimination purpose.It relatively is applicable to eliminates the Low Medium Frequency noise, and relatively poor to the noise elimination effect of high-frequency noise.
In view of this, the utility model designer is not to attaining perfect many disappearances and the inconvenience that causes in the existing acoustic wave filter structure design, and deeply design, and the active research improvement has a fling at and development and Design goes out the utility model.
The model utility content
The purpose of the utility model is to provide a kind of impedance acoustic flow pattern blower fan silencing apparatus that can suppress high, medium and low frequency range band noise simultaneously, good muffling effect.
In order to reach above-mentioned purpose, the solution of the utility model is:
A kind of impedance acoustic flow pattern blower fan silencing apparatus, it is located in the exhaust outlet or exhaust duct of blower fan, and this impedance acoustic flow pattern blower fan silencing apparatus has a hollow casing; One end of this housing is an intake grill, and the other end is an exhaust outlet, and the intake grill place is provided with the damping venetian blind; In housing, also be provided with two arc deflectors, an end of two guide plates interfixes, and the left and right sides with inner walls of the other end symmetry is fixed; Form a noise elimination wedge, said guide plate is provided with some air guide holes.
The perfect condition of this impedance acoustic flow pattern blower fan silencing apparatus is that said housing is made as a undergauge near the exhaust outlet place.
The perfect condition of this impedance acoustic flow pattern blower fan silencing apparatus is that the diameter of said air guide hole is 12mm.
The perfect condition of this impedance acoustic flow pattern blower fan silencing apparatus is also to be provided with sound absorption on the said inner walls and to reduce the acoustic vibration layer.
Said absorbent treatment is made up of one or more mixing in nonwovens, acoustical cotton, glass wool or the sponge.
The utility model impedance acoustic flow pattern blower fan silencing apparatus utilizes the obstruct of venetian blind to eliminate the noise, and is resistance noise reduction here, utilizes the buffering of two arc deflectors and the noise elimination wedge of two guide plates formation that noise is carried out the secondary noise elimination again, and this is a reactive muffling.The utility model combines the noise that formation impedance acoustic flow pattern can suppress high, medium and low frequency simultaneously with resistive structure and reactive muffling structure, has the acoustic characteristics of dissipative muffler and reactive muffler concurrently, good muffling effect.
Confirm according to the on-the-spot noise source of all kinds of fan operations in power station being carried out the characteristic data of being on the point of that actual test obtained the much sound deadening capacities of needs are as the main foundation of design sound absorption plate structure and fluid passage in which spectral range; Adopted narrow rectangular channel simultaneously, to strengthen assimilation effect with big sound-absorbing material facing.Because the noise source of blower fan is when maximum noise level, its spectrum value is often a kind of incessantly, and to the different spectral band, requires also inequality to its sound deadening capacity.The utility model impedance acoustic flow pattern blower fan silencing apparatus has adopted the anti-formula structure that the resistance formula structure high, that the intermediate frequency broadband noise plays the noise elimination effect and centering, low-frequency noise is played the noise elimination effect for this reason; In resistance formula passage, high frequency and two kinds of acoustic attenuation zones of low frequency have been adopted simultaneously; In order to broadening noise elimination frequency band to greatest extent, to realize good noise elimination effect.
Description of drawings
Fig. 1 is the plan view of the utility model impedance acoustic flow pattern blower fan silencing apparatus;
Fig. 2 is the side sectional view of the utility model impedance acoustic flow pattern blower fan silencing apparatus.
Embodiment
In order further to explain the technological scheme of the utility model, come the utility model is set forth in detail through specific embodiment below.
Fig. 1, Fig. 2 are the structural representation of the utility model impedance acoustic flow pattern blower fan silencing apparatus 10 preferred embodiments; This impedance acoustic flow pattern blower fan silencing apparatus 10 is located at (not shown) in exhaust outlet or the exhaust duct of blower fan, and is as shown in the figure; This impedance acoustic flow pattern blower fan silencing apparatus 10 has a hollow casing 1; One end of this hollow casing 1 corresponding fan airflow flow direction is made as intake grill 11, and the other end is an exhaust outlet 12, and housing 1 is made as a undergauge near exhaust outlet 12 places.The inwall of housing 1 also is provided with sound-absorption layer 13, and absorbent treatment 13 adds acoustical cotton by nonwovens and forms, and also can be replaced by other sound absorbing materials, for example sponge, glass wool etc.11 places are provided with damping venetian blind 2 at intake grill, and this damping venetian blind 2 is made up of some louvre blades 21, each louvre blade 21 several angle that all tilts, and 21 of adjacent two louvre blades, the top that is positioned at below louvre blade 21 is higher than the bottom of louvre blade 21.In housing 1, also be provided with two arc deflectors 3, it is that an end of air guide hole 31, two guide plates 3 of 12mm interfixes that said guide plate 3 is provided with some diameters, and the other end is fixed with the madial wall of housing 1 respectively, forms a wedge absorber.
During fan operation, its noise source is when maximum noise level, and spectrum value is often a kind of incessantly, and to the different spectral band, requires also inequality to its sound deadening capacity.The noise that produces gets into the utility model impedance acoustic flow pattern blower fan silencing apparatus 10, and at intake grill 11 places, a part of noise carries out the first time and eliminates the noise because the obstruct of damping venetian blind 2 is converted into heat energy with acoustic energy; Residual noise is along with air-flow is moved by the direction to exhaust outlet in the gap entering housing 1 of adjacent two louvre blades 21; In housing 1, since the viscous resistance of air, the vibration friction of air and sound-absorption layer 13; Make quite a few acoustic energy change into heat energy again and be absorbed, this is to eliminate the noise for the second time; Last buffering owing to two arc deflectors 3 has been avoided the mutual collision between air-flow, and acoustic energy has been converted into heat energy; The noise elimination wedge that two guide plates form is applicable to the air blast environment, and is mainly to liking the HQ high quality anechoic room, more effective to the absorption of low frequency; Can eliminate standing wave; Reach the requirement of stopping echo, low cutoff frequency acoustic absorptivity is accomplished for the third time and is eliminated the noise greater than 0.9.Through three noise reductions, suppress the noise that blower fan produces to greatest extent, and air-flow can be smoothly through the air guide hole 31 on the guide plate 3, flow to pipeline or directly be disposed to the atmosphere from the undergauge exhaust outlet.
Product form of the foregoing description and graphic and non-limiting the utility model and style, the those of ordinary skill of any affiliated technical field all should be regarded as not breaking away from the patent category of the utility model to its suitable variation or modification of doing.

Claims (4)

1. impedance acoustic flow pattern blower fan silencing apparatus, it is located in the exhaust outlet or exhaust duct of blower fan, it is characterized in that: this impedance acoustic flow pattern blower fan silencing apparatus has a hollow casing; One end of this housing is an intake grill; The other end is an exhaust outlet, and the intake grill place is provided with the damping venetian blind, in housing, also is provided with two arc flexible fluid-directing plates; One end of two guide plates interfixes; The left and right sides with inner walls of the other end symmetry is fixed, and forms a noise elimination wedge, and said guide plate is provided with some air guide holes.
2. impedance acoustic flow pattern blower fan silencing apparatus as claimed in claim 1, it is characterized in that: said housing is made as a undergauge near the exhaust outlet place.
3. impedance acoustic flow pattern blower fan silencing apparatus as claimed in claim 1, it is characterized in that: the diameter of said air guide hole is 12mm.
4. impedance acoustic flow pattern blower fan silencing apparatus as claimed in claim 1 is characterized in that: also be provided with absorbent treatment on the said inner walls.
CN201120250760XU 2011-07-15 2011-07-15 Impedance acoustic streaming blower muffler Expired - Fee Related CN202187960U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201120250760XU CN202187960U (en) 2011-07-15 2011-07-15 Impedance acoustic streaming blower muffler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201120250760XU CN202187960U (en) 2011-07-15 2011-07-15 Impedance acoustic streaming blower muffler

Publications (1)

Publication Number Publication Date
CN202187960U true CN202187960U (en) 2012-04-11

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105570200A (en) * 2014-11-06 2016-05-11 际华三五零六纺织服装有限公司 Noise reduction silencer for air outlet of dust removal fan
CN105828580A (en) * 2016-05-06 2016-08-03 深圳市德世科通讯科技有限公司 Combined cabinet capable of separately adjusting heat dissipation of cabinets
CN105864109A (en) * 2015-01-22 2016-08-17 中国科学院声学研究所 Silencer for axial flow fan air inlet
CN108144470A (en) * 2017-12-18 2018-06-12 大连通亚重工有限公司 A kind of gas-liquid mixed pipe
CN111749178A (en) * 2020-07-07 2020-10-09 扬州大学 Combined washing and sweeping vehicle noise reduction suction port, machining die and use method of machining die
CN112772310A (en) * 2015-05-28 2021-05-11 胡斯华纳有限公司 Blower fan

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105570200A (en) * 2014-11-06 2016-05-11 际华三五零六纺织服装有限公司 Noise reduction silencer for air outlet of dust removal fan
CN105570200B (en) * 2014-11-06 2019-07-26 际华三五零六纺织服装有限公司 A kind of dedusting fan air outlet noise-reduction device
CN105864109A (en) * 2015-01-22 2016-08-17 中国科学院声学研究所 Silencer for axial flow fan air inlet
CN105864109B (en) * 2015-01-22 2018-08-07 中国科学院声学研究所 A kind of axial flow blower air inlet silencer
CN112772310A (en) * 2015-05-28 2021-05-11 胡斯华纳有限公司 Blower fan
CN112772310B (en) * 2015-05-28 2022-06-03 胡斯华纳有限公司 Blower fan
CN105828580A (en) * 2016-05-06 2016-08-03 深圳市德世科通讯科技有限公司 Combined cabinet capable of separately adjusting heat dissipation of cabinets
CN108144470A (en) * 2017-12-18 2018-06-12 大连通亚重工有限公司 A kind of gas-liquid mixed pipe
CN111749178A (en) * 2020-07-07 2020-10-09 扬州大学 Combined washing and sweeping vehicle noise reduction suction port, machining die and use method of machining die
CN111749178B (en) * 2020-07-07 2021-08-06 扬州大学 Combined washing and sweeping vehicle noise reduction suction port, machining die and use method of machining die

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C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee
CP02 Change in the address of a patent holder

Address after: 361009, four, fifth West staircase, 48-50 Huli Avenue, Huli District, Fujian, Xiamen

Patentee after: Xiamen Lantian Bihai Investment Co.,Ltd.

Address before: 361009, Fujian Province, Huli County, Huli District, Xiamen town after the village of loyalty group

Patentee before: Xiamen Lantian Bihai Investment Co.,Ltd.

CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120411

Termination date: 20150715

EXPY Termination of patent right or utility model