CN207634397U - Ventilation silencer - Google Patents

Ventilation silencer Download PDF

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Publication number
CN207634397U
CN207634397U CN201721131415.8U CN201721131415U CN207634397U CN 207634397 U CN207634397 U CN 207634397U CN 201721131415 U CN201721131415 U CN 201721131415U CN 207634397 U CN207634397 U CN 207634397U
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CN
China
Prior art keywords
sound absorption
low frequency
middle low
monomer
ventilation silencer
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CN201721131415.8U
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Chinese (zh)
Inventor
罗伟
余永生
李鹏
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Shanghai Swat Acoustics Technology Co Ltd
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Shanghai Swat Acoustics Technology Co Ltd
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Priority to CN201721131415.8U priority Critical patent/CN207634397U/en
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Abstract

The utility model is related to a kind of ventilation silencers, including anechoic sheet (1) and muffler body (4), it is in matrix form in the wherein described muffler body (4), it is equipped at intervals with several anechoic sheets (1), anechoic sheet (1) interior side or upper and lower both sides are equipped with middle low frequency lumen sound absorption structure (8), the middle low frequency lumen sound absorption structure (8) is internal to form several sound absorption monomers (2) by demarcation strip (9), it is cavity structure inside the sound absorption monomer (2), the sound absorption monomer (2), middle low frequency lumen sound absorption structure (8) homonymy is equipped with hole, for installing long tube (3), the long tube (3) is mounted in the cavity of sound absorption monomer (2).The utility model is simple in structure, easy to use, by installing the sound absorption monomer combination sound-absorbing porous material of a plurality of cavities structure, solves the problems, such as that silencer is low to low frequency absorption efficiency in the prior art.

Description

Ventilation silencer
Technical field
The utility model category ventilating system noise reduction and noise abatement technical field, more particularly to a kind of ventilation silencer.
Background technology
Often use ventilation blower in industrial or civilian, the noise of ventilation blower mainly based on aerodynamic noise, It is propagated outward along pipeline by the inlet and outlet of ventilation blower.So there are one reduce duct noise for meeting.
It is the method to noise processed on route of transmission using ventilation silencer, ventilation silencer is a kind of energy prevention Noise transmission, the device that air-flow can also pass through, is installed on the gas channel of air powered equipment, according to noise-cancelling theory, Silencer can be divided into the types such as dissipative muffler, reactive muffler, diffusor, and common silencer is mostly that medium-high frequency is inhaled Sound, effect of low-frequency sound absorption are very weak.
Invention content
The technical problem to be solved by the utility model is to provide a kind of ventilation silencers, in being installed in anechoic sheet Low frequency lumen sound absorption structure solves the problems, such as that silencer common in the art is low to Middle and low frequency noise absorption efficiency.
Technical solution adopted by the utility model to solve its technical problems is:A kind of ventilation silencer structure is provided, is wrapped Anechoic sheet and muffler body are included, wherein being in matrix form in the muffler body, being equipped at intervals with several anechoic sheets, one inside the anechoic sheet Side or upper and lower both sides are equipped with middle low frequency lumen sound absorption structure, if being formed by demarcation strip inside the middle low frequency lumen sound absorption structure Dry sound absorption monomer, the sound absorption monomer inside is cavity structure, and the sound absorption monomer, middle low frequency lumen sound absorption structure homonymy are set There is hole, for installing long tube, the long tube is mounted in the cavity of sound absorption monomer.
The further technical solution of the utility model is that the muffler body is that both ends are equipped with the regular of opening or irregular several What body structure.
The further technical solution of the utility model is that the anechoic sheet includes chassis body, and the chassis body is left Right both ends are respectively equipped with fair water cone and water conservancy diversion point, and the fair water cone is arcuate structure, and the water conservancy diversion point is wedge structure.
The further technical solution of the utility model is that the chassis body is regular texture or irregular structure.
The further technical solution of the utility model is, the middle low frequency lumen sound absorption structure by several of different sizes or Identical sound absorption monomer split is formed.
The further technical solution of the utility model is that the middle low frequency lumen sound absorption structure and sound absorption monomer are rule Or irregular geometry.
The further technical solution of the utility model is that the middle low frequency lumen sound absorption structure is ductile metal or non- Metal material.
The further technical solution of the utility model is that the circular hole in the middle low frequency lumen sound absorption structure can pass through net Lattice or porous plate carry out sealing treatment hole.
The further technical solution of the utility model is that sound-absorbing porous material is filled in the long tube.
By sound absorption frequency formula(wherein, c is the velocity of sound, and s is orifice area, and V is cavity volume, and l is pipe It is long) it is found that in order to realize low frequency, it is possible to reduce the area of nozzle increases cavity volume or increases the length of pipe:It is managed when reducing When the area of mouth, sound absorber acoustic resistance can be made excessive, reduce acoustic absorptivity, such as microperforated panel will beat many in the plane Hole, punching rate increase, and acoustic resistance becomes smaller, and acoustic resistance can be further increased after being coupled due to multiple resonators, so to realize multiple The acoustic resistance of the coupling of cavity, single structure must be under conditions of a very little, so being obtained to many resonator couplings The sound absorption effect of wideband and high acoustic absorption coefficient can not be completed only by reducing the opening area of nozzle;Increase resonant cavity volume V Or pipe range l realizes that low frequency, since cavity tip thickness is very thin, can only increase since pipe range l is generally equivalent to cavity tip thickness Resonant cavity volume V, therefore, the volume of low frequency acoustic resonator is all very big in engineering at present, and the utility model need not increase resonant cavity Volume V increases pipe range l to absorb low-frequency sound, reduces single resonator occupied area and thickness by the form of long tube in introducing Degree, and increase bandwidth by coupling multiple sound absorbers.
Advantageous effect
The utility model is simple in structure, easy to use, by low frequency lumen sound absorption structure in installation, solves the prior art In the common silencer problem low to Middle and low frequency noise absorption efficiency can be in the hole of the utility model and when absorbing sound high frequency Sound-absorbing porous material is installed, while playing the effect of low frequency and high frequency in absorption.
Description of the drawings
FIG. 1 is a schematic structural view of the utility model.
Fig. 2 is that the utility model anechoic sheet side is equipped with sound absorption monomer structure schematic diagram.
Fig. 3 is that both sides are equipped with sound absorption monomer structure schematic diagram to the utility model anechoic sheet up and down.
Fig. 4 is middle low frequency lumen sound absorption structure side cutaway opening structure schematic diagram.
Fig. 5 is the utility model sound absorption monomer structure schematic diagram.
Fig. 6 is low frequency lumen sound absorption structure schematic diagram in the utility model.
Specific implementation mode
With reference to specific embodiment, the utility model is expanded on further.It should be understood that these embodiments are merely to illustrate this Utility model rather than limitation the scope of the utility model.In addition, it should also be understood that, in the content for having read the utility model instruction Later, those skilled in the art can make various changes or modifications the utility model, and such equivalent forms equally fall within this Shen It please the appended claims limited range.
Embodiment 1
As shown in figs 1 to 6, a kind of ventilation silencer structure, including anechoic sheet 1 and muffler body 4, wherein the muffler body It is in matrix form in 4, is equipped at intervals with several anechoic sheets 1,1 interior side of the anechoic sheet or upper and lower both sides equipped with the suction of middle low frequency lumen Acoustic form 8 forms several sound absorption monomers 2, the sound absorption monomer 2 inside the middle low frequency lumen sound absorption structure 8 by demarcation strip 9 Inside is cavity structure, and the sound absorption monomer 2, middle 8 homonymy of low frequency lumen sound absorption structure are equipped with hole, for installing long tube 3, institute Long tube 3 is stated to be mounted in the cavity of sound absorption monomer 2.
As shown in Figure 1, the muffler body 4, which is both ends, is equipped with the rule being open or irregular geometry structure.
As shown in figure 3, the anechoic sheet 1 includes chassis body 5,5 left and right ends of the chassis body are respectively equipped with water conservancy diversion Cap 6 and water conservancy diversion point 7, the fair water cone 6 are arcuate structure, and the water conservancy diversion point 7 is wedge structure.
The chassis body 5 is regular texture or irregular structure.
The middle low frequency lumen sound absorption structure 8 is formed by several of different sizes or identical 2 split of sound absorption monomer, in described Low frequency lumen sound absorption structure 8 and sound absorption monomer 2 are rule or irregular geometry, and the middle low frequency lumen sound absorption structure 8 is can Plastic metal or nonmetallic materials, the circular hole in the middle low frequency lumen sound absorption structure 8 can be sealed by grid or porous plate Mouth processing hole, as shown in Figure 5.
In actual use, the anechoic sheet 1 for being internally provided with middle low frequency lumen sound absorption structure 8 is set in matrix form, interval side by side Set in muffler body 4, and fair water cone 6 and water conservancy diversion point 7 correspond to respectively, then by muffler body 4 be mounted on wait at silencing channel (such as In exhausting silencer tower), wherein 6 side of fair water cone is towards air inlet, sharp 7 sides of water conservancy diversion towards air outlet.

Claims (9)

1. a kind of ventilation silencer, including anechoic sheet (1) and muffler body (4), it is characterised in that:It is in square in the muffler body (4) Configuration is equipped at intervals with several anechoic sheets (1), anechoic sheet (1) interior side or upper and lower both sides equipped with the sound absorption of middle low frequency lumen Structure (8), the middle low frequency lumen sound absorption structure (8) is internal to form several sound absorption monomers (2), the suction by demarcation strip (9) It is cavity structure inside sound monomer (2), the sound absorption monomer (2), middle low frequency lumen sound absorption structure (8) homonymy are equipped with hole, use In installation long tube (3), the long tube (3) is mounted in the cavity of sound absorption monomer (2).
2. a kind of ventilation silencer according to claim 1, it is characterised in that:The muffler body (4) is equipped with for both ends and opens The rule or irregular geometry structure of mouth.
3. a kind of ventilation silencer according to claim 1, it is characterised in that:The anechoic sheet (1) includes chassis body (5), chassis body (5) left and right ends are respectively equipped with fair water cone (6) and water conservancy diversion is sharp (7), and the fair water cone (6) is arc knot Structure, the water conservancy diversion sharp (7) are wedge structure.
4. a kind of ventilation silencer according to claim 3, it is characterised in that:The chassis body (5) is regular texture Or irregular structure.
5. a kind of ventilation silencer according to claim 1, it is characterised in that:The middle low frequency lumen sound absorption structure (8) It is formed by several of different sizes or identical sound absorption monomer (2) split.
6. a kind of ventilation silencer according to claim 1, it is characterised in that:The middle low frequency lumen sound absorption structure (8) It is rule or irregular geometry with sound absorption monomer (2).
7. a kind of ventilation silencer according to claim 1, it is characterised in that:The middle low frequency lumen sound absorption structure (8) For ductile metal or nonmetallic materials.
8. a kind of ventilation silencer according to claim 1, it is characterised in that:The middle low frequency lumen sound absorption structure (8) On circular hole can pass through grid or porous plate and carry out sealing treatment hole.
9. a kind of ventilation silencer according to claim 1, it is characterised in that:Porous suction is filled in the long tube (3) Sound material.
CN201721131415.8U 2017-09-05 2017-09-05 Ventilation silencer Active CN207634397U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721131415.8U CN207634397U (en) 2017-09-05 2017-09-05 Ventilation silencer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721131415.8U CN207634397U (en) 2017-09-05 2017-09-05 Ventilation silencer

Publications (1)

Publication Number Publication Date
CN207634397U true CN207634397U (en) 2018-07-20

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ID=62861479

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201721131415.8U Active CN207634397U (en) 2017-09-05 2017-09-05 Ventilation silencer

Country Status (1)

Country Link
CN (1) CN207634397U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110626364A (en) * 2019-09-24 2019-12-31 中车株洲电力机车有限公司 Sound insulation structure of cooling system of railway vehicle and manufacturing method of sound insulation structure
CN111489727A (en) * 2020-05-22 2020-08-04 华电重工股份有限公司 Silencing sheet
CN112071296A (en) * 2019-06-10 2020-12-11 丰田自动车工程及制造北美公司 Sound insulation device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112071296A (en) * 2019-06-10 2020-12-11 丰田自动车工程及制造北美公司 Sound insulation device
CN112071296B (en) * 2019-06-10 2023-04-11 丰田自动车工程及制造北美公司 Sound-proof device
CN110626364A (en) * 2019-09-24 2019-12-31 中车株洲电力机车有限公司 Sound insulation structure of cooling system of railway vehicle and manufacturing method of sound insulation structure
CN110626364B (en) * 2019-09-24 2021-10-22 中车株洲电力机车有限公司 Sound insulation structure of cooling system of railway vehicle and manufacturing method of sound insulation structure
CN111489727A (en) * 2020-05-22 2020-08-04 华电重工股份有限公司 Silencing sheet

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