CN106448646A - Adsorption-type wave absorber - Google Patents
Adsorption-type wave absorber Download PDFInfo
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- CN106448646A CN106448646A CN201610918727.7A CN201610918727A CN106448646A CN 106448646 A CN106448646 A CN 106448646A CN 201610918727 A CN201610918727 A CN 201610918727A CN 106448646 A CN106448646 A CN 106448646A
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- elimination cavity
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- wall
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- 239000006096 absorbing agent Substances 0.000 title abstract 3
- 230000008030 elimination Effects 0.000 claims description 121
- 238000003379 elimination reaction Methods 0.000 claims description 121
- 238000005192 partition Methods 0.000 claims description 15
- 239000010425 asbestos Substances 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 6
- 229910052895 riebeckite Inorganic materials 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 3
- 238000010183 spectrum analysis Methods 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 abstract 5
- 230000035515 penetration Effects 0.000 abstract 4
- 230000030279 gene silencing Effects 0.000 abstract 2
- 230000001902 propagating effect Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 6
- 230000000644 propagated effect Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005713 exacerbation Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses an adsorption-type wave absorber which comprises a sound source outer wall (1). The adsorption-type wave absorber is characterized in that the outer surface of the sound source outer wall (1) is provided with a sound wave hole penetration area in the sound wave propagating direction, multiple evenly-distributed sound wave holes are evenly formed in the sound wave hole penetration area in a penetration mode, and multiple wave absorption units (3) are fixed to the portion, outside the sound wave hole penetration area, of the sound source outer wall (1) in a sealed mode. The multiple wave absorption units are installed in the sound wave propagating direction, silencing cavities at three levels or above are adopted in each wave absorption unit, the length of the silencing cavities is set according to the dominant frequency wavelength obtained after spectral analysis, wave absorption and noise reduction are carried out level by level according to the principle of sound waves, the sound absorption and noise reduction ability is multiplied, and the application range is wide.
Description
Technical field
The present invention relates to a kind of wave absorbing device, more particularly, to a kind of adsorption-type wave absorbing device, belong to absorbing sound and lowering noise technical field.
Background technology
At present, the industry such as iron and steel, metallurgy, petrochemical industry, machining is required for using pneumatic equipment, air pressure to push away in a large number
The equipment of dynamic operating, conveying equipment etc., these equipment are exactly huge noise pollution source in operation process, all can produce very
Big exceeded noise, severe exacerbation production and processing environment.Sound wave produced by noise pollution source and vibration wave can be through outer
Housing is outwards propagated, and the propagation according to sound wave and transport properties are propagated.Existing absorbing sound and lowering noise apparatus structure is simple, installs
Transformation is loaded down with trivial details, absorbing sound and lowering noise effect on driving birds is not good it is impossible to meet largely absorbing sound and lowering noise needs, using receiving certain restriction.
Content of the invention
The purpose of the present invention is simple for existing absorbing sound and lowering noise apparatus structure, installs and transforms loaded down with trivial details, absorbing sound and lowering noise effect
Fruit is not good now to be provided a kind of rational in infrastructure it is impossible to meet the largely defect of absorbing sound and lowering noise needs and deficiency, installation transformation letter
Just, absorbing sound and lowering noise ability is significantly improved, can sound-absorbing and noise reduction by a relatively large margin, a kind of range widely adsorption-type
Wave absorbing device.
For achieving the above object, the technical solution of the present invention is：A kind of adsorption-type wave absorbing device, including sound source outer wall,
It is characterized in that：On the outer surface of described sound source outer wall, the direction along sonic propagation offers sound wave hole punched areas, sound wave
The multiple equally distributed sound wave hole running through setting, the sound source outside the punched areas of sound wave hole is uniformly offered in the punched areas of hole
On outer wall, sealing is fixed with multiple suction ripple units.
The aperture in each sound wave hole in the punched areas of described sound wave hole be 2 millimeters -5 millimeters, between adjacent acoustic wave hole between
Away from for 1.5-3 times of aperture, the gross area in sound wave hole is more than 3/10 with the ratio of the sound wave hole punched areas being located, and bores a hole in sound wave hole
The outside in region is fixed with asbestos packing sheet, and asbestos packing sheet offers the hole corresponding with sound wave hole size.
The described cross-sectional area inhaling ripple unit is rectangle, ellipse, trapezoidal or polygon, positioned at each suction ripple of sound source side
Cell cross-section amasss more than 8 times of the endoporus area that sum is sound source outer wall.
A kind of inhale ripple unit, including shell body it is characterised in that：Described shell body includes front shroud, back shroud and cavity
Outer wall, front shroud is located at the side near sound source, and the cavity being formed between shell body and sound source outer wall is respectively the first noise elimination
Chamber, the second noise elimination cavity and the 3rd noise elimination cavity, the first noise elimination cavity, the second noise elimination cavity and the 3rd noise elimination cavity are successively along sonic propagation
Directional spreding, is separated by the first dividing plate between the first noise elimination cavity and the second noise elimination cavity, the second noise elimination cavity and the 3rd noise elimination cavity
Between separated by second partition, the cavity length of the first noise elimination cavity is 1/2nd of dominant frequency ripple wavelength, the second noise elimination cavity
Cavity length be dominant frequency ripple wavelength a quarter, the cavity length of the 3rd noise elimination cavity is 1/8th of dominant frequency ripple wavelength.
The first punch block running through setting, the first punch block is uniformly offered on the sound source outer wall of described first noise elimination intracavity
Opening area length be dominant frequency ripple wavelength a quarter, the distance between the side of opening area and front shroud are dominant frequency ripple
/ 2nd of wavelength, the spacing between the opposite side of opening area and the first dividing plate is a quarter of dominant frequency ripple wavelength；The
The second punch block running through setting, the opening area length of the second punch block are uniformly offered on the sound source outer wall of two noise elimination intracavity
For 1/8th of dominant frequency ripple wavelength, the distance between the side of opening area and first dividing plate for dominant frequency ripple wavelength four/
One, the spacing between the opposite side of opening area and second partition is 1/8th of dominant frequency ripple wavelength；3rd noise elimination intracavity
The 3rd punch block running through setting is uniformly offered on sound source outer wall, the opening area length of the 3rd punch block is dominant frequency ripple wavelength
1/16th, the distance between the side of opening area and second partition are 1/8th of dominant frequency ripple wavelength, aperture area
Spacing between the opposite side in domain and back shroud is 1st/16th of dominant frequency ripple wavelength.
Be provided with damping layer in the interior surface of described front shroud, back shroud and chamber outer wall, the first dividing plate and second every
Plate is respectively elastic microwell plate.
The outside of described 3rd noise elimination cavity is additionally provided with the 4th noise elimination cavity, the combination between the 4th noise elimination cavity and sound source outer wall
Position is provided with the 4th punch block, and the 4th punch block uniformly offers multiple sound wave through holes.
The length of described 4th punch block is 1/8th of dominant frequency ripple wavelength, the side of the 4th punch block and back shroud it
Between distance be dominant frequency ripple wavelength 1/16th.
The inside of described 4th noise elimination cavity is respectively arranged with front elasticity microwell plate and rear elasticity microwell plate, the 4th noise elimination cavity edge
The cavity length on sonic propagation direction is 850 millimeters -1350 millimeters.
It is provided with upper along its length point in the middle part of the inner chamber of described first noise elimination cavity, the second noise elimination cavity and the 3rd noise elimination cavity
The microporosity separator of cloth.
The invention has the beneficial effects as follows：
1st, the present invention is provided with multiple suction ripple units on the direction along sonic propagation, and the inwall inhaling ripple unit is provided with damping
Layer, the outer surface of sound source outer wall offers sound wave hole, and noise sound wave can enter into suction ripple unit from sound wave hole, and is inhaling
Can absorb step by step and offset noise sound wave in the presence of ripple unit, being capable of sound-absorbing and noise reduction by a relatively large margin.
2nd, rationally, each inhales the noise elimination cavity that ripple unit employs more than three-level, the length scale of noise elimination cavity to present configuration
Set according to the dominant frequency wavelength after spectrum analyses, the principle according to sound wave is inhaled ripple noise reduction step by step, absorbing sound and lowering noise ability obtains
To significantly improving, range is extensive.
Brief description
Fig. 1 is the structural representation of the embodiment of the present invention 1.
Fig. 2 is the structural representation of the embodiment of the present invention 2.
Fig. 3 is the sectional view of B-B in Fig. 1.
Fig. 4 is the cross-sectional view inhaling ripple unit embodiment 1.
Fig. 5 is the cross-sectional view inhaling ripple unit embodiment 2.
Fig. 6 is the cross-sectional view inhaling ripple unit embodiment 3.
In figure：Sound source outer wall 1, the first punch block 2-1, the second punch block 2-2, the 3rd punch block 2-3, the 4th punch block 2-
4, suction ripple unit 3, front shroud 4, back shroud 5, chamber outer wall 6, the first noise elimination cavity 7, the second noise elimination cavity 8, the 3rd noise elimination cavity 9, the
Four noise elimination cavities 10, the first dividing plate 11, second partition 12, damping layer 13, front elasticity microwell plate 14, elastic microwell plate 15 afterwards.
Specific embodiment
Below in conjunction with brief description and specific embodiment, the present invention is described in further detail.
Referring to Fig. 1 to Fig. 6, a kind of adsorption-type wave absorbing device of the present invention, including sound source outer wall 1 it is characterised in that：Described sound
On the outer surface of source outer wall 1, the direction along sonic propagation offers sound wave hole punched areas, in the punched areas of sound wave hole uniformly
Offer the multiple equally distributed punch block running through setting, sealing on the sound source outer wall 1 outside the punched areas of sound wave hole is fixed
There are multiple suction ripple units 3.
Each aperture in the punched areas of described sound wave hole be 2 millimeters -5 millimeters, between the punched areas of adjacent acoustic wave hole between
Away from for 1.5-3 times of aperture, the gross area of sound wave hole punched areas is more than 3/10 with the opening area area ratio being located, sound wave
The outside of hole punched areas is fixed with asbestos packing sheet, and asbestos packing sheet offers the hole corresponding with sound wave hole size.
The described cross-sectional area inhaling ripple unit 3 is rectangle, ellipse, trapezoidal or polygon, positioned at each suction of sound source side
Ripple unit 3 cross-sectional area sum is more than 8 times of the endoporus area of sound source outer wall 1.
A kind of inhale ripple unit, including shell body it is characterised in that：Described shell body includes front shroud 4, back shroud 5 and chamber
External wall 6, front shroud 4 is located at the side near sound source, and the cavity being formed between shell body and sound source outer wall 1 is respectively first
Noise elimination cavity 7, the second noise elimination cavity 8 and the 3rd noise elimination cavity 9, the first noise elimination cavity 7, the second noise elimination cavity 8 and the 3rd noise elimination cavity 9 successively along
The directional spreding of sonic propagation, is separated by the first dividing plate 11 between the first noise elimination cavity 7 and the second noise elimination cavity 8, the second noise elimination
Separated by second partition 12 between chamber 8 and the 3rd noise elimination cavity 9, the cavity length of the first noise elimination cavity 7 is dominant frequency ripple wavelength
1/2nd, the cavity length of the second noise elimination cavity 8 is a quarter of dominant frequency ripple wavelength, and the cavity length of the 3rd noise elimination cavity 9 is
/ 8th of dominant frequency ripple wavelength.
The the first punch block 2-1 running through setting uniformly offered on the sound source outer wall 1 in described first noise elimination cavity 7, first
The opening area length of punch block 2-1 be dominant frequency ripple wavelength a quarter, between the side of opening area and front shroud 4 away from
From for 1/2nd of dominant frequency ripple wavelength, the spacing between the opposite side of opening area and the first dividing plate 11 is dominant frequency ripple wavelength
A quarter；The the second punch block 2-2 running through setting, the second perforation are uniformly offered on the sound source outer wall 1 in the second noise elimination cavity 8
The opening area length of area 2-2 be dominant frequency ripple wavelength 1/8th, between the side of opening area and the first dividing plate 11 away from
It is dominant frequency ripple wavelength from the spacing between a quarter for dominant frequency ripple wavelength, the opposite side of opening area and second partition 12
1/8th；The 3rd punch block 2-3 running through setting, the 3rd perforation are uniformly offered on the sound source outer wall 1 in the 3rd noise elimination cavity 9
The opening area length of area 2-3 is 1st/16th of dominant frequency ripple wavelength, between the side of opening area and second partition 12
Distance is 1/8th of dominant frequency ripple wavelength, and the spacing between the opposite side of opening area and back shroud 5 is dominant frequency ripple wavelength
1/16th.
Damping layer 13, the first dividing plate 11 He are provided with the interior surface of described front shroud 4, back shroud 5 and chamber outer wall 6
Second partition 12 is respectively elastic microwell plate.
The outside of described 3rd noise elimination cavity 9 is additionally provided with the 4th noise elimination cavity 10, between the 4th noise elimination cavity 10 and sound source outer wall 1
Binding site be provided with the 4th punch block 2-4, the 4th punch block 2-4 uniformly offers multiple sound wave through holes.
The length of described 4th punch block 2-4 be dominant frequency ripple wavelength 1/8th, the side of the 4th punch block 2-4 with after
The distance between cover plate 5 is 1st/16th of dominant frequency ripple wavelength.
The inside of described 4th noise elimination cavity 10 is respectively arranged with front elasticity microwell plate 14 and rear elasticity microwell plate 15, and the 4th disappears
The operatic tunes 10 is 850 millimeters -1350 millimeters along the cavity length on sonic propagation direction.
It is provided with along its length in the middle part of the inner chamber of described first noise elimination cavity 7, the second noise elimination cavity 8 and the 3rd noise elimination cavity 9
The microporosity separator of upper distribution.
Referring to Fig. 1 to Fig. 3, sound source outer wall 1 is the shell body of sound source, for example：Blower housing, conveyance conduit, high-power electricity
Machine shell etc. produces the various device housings of loud noise, and sound source outer wall 1 can be the various shapes such as pipe, square tube, from sound source
The noise sound wave that place sends outwards can be propagated by sound source outer wall 1.Such as, conveyance conduit can produce when from power end conveying material
The larger noise sound wave of life, noise sound wave can outwards be propagated along conveyance conduit and spread, conveying in conveyance conduit for the material
Speed is bigger, and produced noise is bigger.The present invention, in order to effectively absorb and reduce noise, sets in the outer surface of sound source outer wall 1
It is equipped with multiple suction ripple units 3, inhale ripple unit 3 and can greatly absorb and abate the noise.
On the outer surface of sound source outer wall 1, the direction along sonic propagation offers sound wave hole punched areas, bores a hole in sound wave hole
Uniformly offer the sound wave hole running through setting in region, on the sound source outer wall 1 outside the punched areas of sound wave hole sealing be fixed with many
Individual suction ripple unit 3, noise sound wave can enter into suction ripple unit 3 from sound wave hole.For the ease of later stage detachable maintaining, inhale ripple list
Unit 3 is fixed on sound source outer wall 1 by bolt or screw, and faying face is additionally provided with sealing gasket, not using being welded and fixed
Mode.For example：If giving conveyance conduit sound-deadening and noise-reducing, inhaling ripple unit 3 and being just arranged on the outer surface of conveyance conduit, generally
6-8 symmetrical, inhales ripple unit 3 along the direction setting of sonic propagation.Inhale ripple unit 3 and can not only be arranged on circular arc table
Face, moreover it is possible to install in the plane, can adapt to multiple installation surfaces of different shapes.Suction ripple unit 3 is various shapes, referring to figure
4 to Fig. 6, the cross-sectional area inhaling ripple unit 3 is rectangle, ellipse, trapezoidal or polygon, inhales outside wall thickness and the sound source of ripple unit 3
The thickness of wall 1 is close, and each suction ripple unit 3 cross-sectional area sum positioned at sound source side is 8 times of the endoporus area of sound source outer wall 1
More than.The aperture in sound wave hole is 2 millimeters -5 millimeters, and the spacing between adjacent acoustic wave hole is 1.5-3 times of aperture, sound wave hole total
Area is more than 3/10 with the opening area area ratio being located.
Inhale that ripple unit 3 includes front shroud 4, back shroud 5, chamber outer wall 6, the first noise elimination cavity 7, the second noise elimination cavity the 8, the 3rd disappear
The operatic tunes 9, the first dividing plate 11, second partition 12 and damping layer 13, the shell body inhaling ripple unit 3 is by front shroud 4, back shroud 5 and
Chamber outer wall 6 is constituted, and front shroud 4 and back shroud 5 are located at the two ends inhaling ripple unit 3 respectively, and front shroud 4 is located near sound source
Side.The cavity being formed between shell body and sound source outer wall 1 is respectively the first noise elimination cavity 7, the second noise elimination cavity 8 and the 3rd disappears
The operatic tunes 9, successively along the directional spreding of sonic propagation, sound wave is successively for the first noise elimination cavity 7, the second noise elimination cavity 8 and the 3rd noise elimination cavity 9
Carry out absorbing sound and lowering noise step by step through the first noise elimination cavity 7, the second noise elimination cavity 8 and the 3rd noise elimination cavity 9.
The the first punch block 2-1 running through setting, the first perforation are uniformly offered on the sound source outer wall 1 in the first noise elimination cavity 7
The opening area length of area 2-1 is a quarter of dominant frequency ripple wavelength, and the distance between the side of opening area and front shroud 4 are
/ 2nd of dominant frequency ripple wavelength, the spacing between the opposite side of opening area and the first dividing plate 11 is four points of dominant frequency ripple wavelength
One of；The the second punch block 2-2 running through setting, the second punch block 2- are uniformly offered on the sound source outer wall 1 in the second noise elimination cavity 8
2 opening area length is 1/8th of dominant frequency ripple wavelength, and the distance between the side of opening area and first dividing plate 11 are
The a quarter of dominant frequency ripple wavelength, the spacing between the opposite side of opening area and second partition 12 is eight points of dominant frequency ripple wavelength
One of；The 3rd punch block 2-3 running through setting, the 3rd punch block 2- are uniformly offered on the sound source outer wall 1 in the 3rd noise elimination cavity 9
3 opening area length is 1st/16th of dominant frequency ripple wavelength, the distance between the side of opening area and second partition 12
For 1/8th of dominant frequency ripple wavelength, the spacing between the opposite side of opening area and back shroud 5 is the 16 of dominant frequency ripple wavelength
/ mono-.Dominant frequency ripple is to get according to after spectrum analyses, the sound wave in main frequency range that dominant frequency ripple is sent by noise sound source,
The length scale of noise elimination cavity sets according to the dominant frequency wavelength after spectrum analyses.
The sound-deadening and noise-reducing principle inhaling ripple unit 3 is as follows：Noise sound wave can first conduct to the first noise elimination cavity 7, the first noise elimination
Chamber 7 is 1/2nd of dominant frequency ripple wavelength along the cavity length in sound wave conduction orientation, and noise sound wave can be in the first noise elimination cavity 7
Inside carry out inhaling ripple for the first time.Subsequently, and then the noise sound wave after the first noise elimination cavity 7 tentatively inhales ripple can enter into second and disappear
In the operatic tunes 8, the cavity length of the second noise elimination cavity 8 is a quarter of dominant frequency ripple wavelength, and noise sound wave can be in the second noise elimination cavity 8
Carry out second suction ripple.And then noise sound wave after the second noise elimination cavity 8 tentatively inhales ripple can enter into the 3rd noise elimination cavity 9
Interior, the cavity length of the 3rd noise elimination cavity 9 is 1/8th of dominant frequency ripple wavelength, and noise sound wave can be carried out in the 3rd noise elimination cavity 9
Third time inhales ripple, and after three times are inhaled ripple noise reduction, noise decibels can reduce 30%-60%.The size of each noise elimination cavity depends on
Live actual spectrum analysis to noise, the length of noise elimination cavity is excessive or too small does not all reach optimal absorbing sound and lowering noise effect.
In order to improve sound-deadening and noise-reducing effect further, the present invention is additionally provided with the 4th noise elimination in the outside of the 3rd noise elimination cavity 9
Chamber 10, the 4th noise elimination cavity 10 is close to the 3rd noise elimination cavity 9, across elastic micropore between the 3rd noise elimination cavity 9 and the 4th noise elimination cavity 10
Plate.Noise sound wave after three times are inhaled ripple noise reduction is inhaled ripple noise reduction in conducting to the 4th noise elimination cavity 10 once again, and the 4th disappears
The operatic tunes 10 is mainly used in absorbing and offsets the part omitted after the first noise elimination cavity 7, the second noise elimination cavity 8 and the 3rd noise elimination cavity 9
Sound wave.Binding site between 4th noise elimination cavity 10 and sound source outer wall 1 is provided with the 4th punch block 2-4, on the 4th punch block 2-4
Uniformly offer multiple sound wave through holes, noise sound wave can enter into the 4th noise elimination cavity 10 from sound wave through hole and carry out sound-absorbing fall
Make an uproar.First punch block 2-1, the second punch block 2-2, the 3rd punch block 2-3 and the 4th punch block 2-4 perforate mode identical,
It is through hole, aperture is 2 millimeters -5 millimeters, the spacing between adjacent acoustic wave hole is 1.5-3 times of aperture, total face in sound wave hole
The long-pending opening area area ratio with place is more than 3/10, to guarantee the density in hole.
The inside of the 4th noise elimination cavity 10 is respectively arranged with front elasticity microwell plate 14 and rear elasticity microwell plate 15, the 4th noise elimination cavity
10 is 1st/16th of dominant frequency ripple wavelength along the cavity length on sonic propagation direction.The opening area of punch block 2-4 is long
Spend 1/8th for dominant frequency ripple wavelength, the distance between the side of opening area and back shroud 5 are the 16 of dominant frequency ripple wavelength
/ mono-, the spacing between the opposite side of opening area and the 4th noise elimination cavity 10 end plate is 1/2nd of dominant frequency ripple wavelength.
In order to improve absorbing sound and lowering noise effect further, the present invention is in the first noise elimination cavity 7, the second noise elimination cavity 8 and the 3rd noise elimination cavity 9
It is provided with the microporosity separator of upper distribution along its length, this microporosity separator can effectively lift absorbing sound and lowering noise effect in chamber.
Claims (10)
1. a kind of adsorption-type wave absorbing device, including sound source outer wall（1）It is characterised in that：Described sound source outer wall（1）Outer surface on edge
The direction sonic propagation offers sound wave hole opening area, uniformly offers and run through the multiple of setting in the opening area of sound wave hole
Equally distributed sound wave hole, the sound source outer wall outside the opening area of sound wave hole（1）Upper sealing is fixed with multiple suction ripple units（3）.
2. a kind of adsorption-type wave absorbing device according to claim 1 it is characterised in that：The aperture in described sound wave hole be 2 millimeters-
5 millimeters, the spacing between adjacent acoustic wave hole is 1.5-3 times of aperture, the opening area area at the gross area in sound wave hole and place
Ratio be more than 3/10, the outside of sound wave hole opening area is fixed with asbestos packing sheet, asbestos packing sheet offers and sound wave hole
The corresponding hole of size.
3. a kind of adsorption-type wave absorbing device according to claim 1 it is characterised in that：Described suction ripple unit（3）Cross section
Amass as rectangle, ellipse, trapezoidal or polygon, positioned at each suction ripple unit of sound source side（3）Cross-sectional area sum is outside sound source
Wall（1）More than 8 times of endoporus area.
4. a kind of inhale ripple unit, including shell body it is characterised in that：Described shell body includes front shroud（4）, back shroud（5）With
Chamber outer wall（6）, front shroud（4）It is located at the side near sound source, shell body and sound source outer wall（1）Between the cavity that formed divide
Wei not the first noise elimination cavity（7）, the second noise elimination cavity（8）With the 3rd noise elimination cavity（9）, the first noise elimination cavity（7）, the second noise elimination cavity（8）With
3rd noise elimination cavity（9）Successively along the directional spreding of sonic propagation, the first noise elimination cavity（7）With the second noise elimination cavity（8）Between pass through
First dividing plate（11）Separate, the second noise elimination cavity（8）With the 3rd noise elimination cavity（9）Between pass through second partition（12）Separate, the
One noise elimination cavity（7）Cavity length be dominant frequency ripple wavelength 1/2nd, the second noise elimination cavity（8）Cavity length be dominant frequency ripple ripple
Long a quarter, the 3rd noise elimination cavity（9）Cavity length be dominant frequency ripple wavelength 1/8th.
5. according to claim 4 a kind of inhale ripple unit it is characterised in that：Described first noise elimination cavity（7）Outside interior sound source
Wall（1）On uniformly offer the first punch block running through setting（2-1）, the first punch block（2-1）Opening area length based on
The a quarter of frequency ripple wavelength, the side of opening area and front shroud（4）The distance between for dominant frequency ripple wavelength 1/2nd,
The opposite side of opening area and the first dividing plate（11）Between spacing be dominant frequency ripple wavelength a quarter；Second noise elimination cavity（8）
Interior sound source outer wall（1）On uniformly offer the second punch block running through setting（2-2）, the second punch block（2-2）Aperture area
Length of field is 1/8th of dominant frequency ripple wavelength, the side of opening area and the first dividing plate（11）The distance between be dominant frequency ripple ripple
Long a quarter, the opposite side of opening area and second partition（12）Between spacing be dominant frequency ripple wavelength 1/8th；
3rd noise elimination cavity（9）Interior sound source outer wall（1）On uniformly offer the 3rd punch block running through setting（2-3）, the 3rd punch block
（2-3）Opening area length be 1st/16th of dominant frequency ripple wavelength, the side of opening area and second partition（12）Between
Distance be 1/8th of dominant frequency ripple wavelength, the opposite side of opening area and back shroud（5）Between spacing be dominant frequency ripple ripple
Long 1/16th.
6. according to claim 4 a kind of inhale ripple unit it is characterised in that：Described front shroud（4）, back shroud（5）And chamber
External wall（6）Interior surface on be provided with damping layer（13）, the first dividing plate（11）And second partition（12）It is respectively elasticity micro-
Orifice plate.
7. according to claim 4 a kind of inhale ripple unit it is characterised in that：Described 3rd noise elimination cavity（9）Outside also set
It is equipped with the 4th noise elimination cavity（10）, the 4th noise elimination cavity（10）With sound source outer wall（1）Between binding site be provided with the 4th punch block
（2-4）, the 4th punch block（2-4）On uniformly offer multiple sound wave through holes.
8. according to claim 4 a kind of inhale ripple unit it is characterised in that：Described 4th punch block（2-4）Length be
/ 8th of dominant frequency ripple wavelength, the 4th punch block（2-4）Side and back shroud（5）The distance between for dominant frequency ripple wavelength
1/16th.
9. according to claim 1 a kind of inhale ripple unit it is characterised in that：Described 4th noise elimination cavity（10）Inside respectively
Elasticity microwell plate before being provided with（14）With rear elasticity microwell plate（15）, the 4th noise elimination cavity（10）In along on sonic propagation direction
Cavity length is 850 millimeters -1350 millimeters.
10. according to claim 4 a kind of inhale ripple unit it is characterised in that：Described first noise elimination cavity（7）, second noise elimination
Chamber（8）And the 3rd noise elimination cavity（9）Inner chamber in the middle part of be provided with the microporosity separator of upper distribution along its length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610918727.7A CN106448646A (en) | 2016-10-21 | 2016-10-21 | Adsorption-type wave absorber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610918727.7A CN106448646A (en) | 2016-10-21 | 2016-10-21 | Adsorption-type wave absorber |
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| CN106448646A true CN106448646A (en) | 2017-02-22 |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| KR100645824B1 (en) * | 2005-06-14 | 2006-11-14 | 김영옥 | The sound-absorbing panel |
| CN103162063A (en) * | 2011-12-09 | 2013-06-19 | 张庆之 | Noise reduction outer shell box used for engine |
| CN102623003A (en) * | 2012-02-28 | 2012-08-01 | 苏州岸肯电子科技有限公司 | Drawing plate of anechoic chamber |
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| CN103730107A (en) * | 2012-10-16 | 2014-04-16 | 吴全如 | Interference silencer |
| CN203311839U (en) * | 2013-01-30 | 2013-11-27 | 昆明理工大学 | New type labyrinth cavity composite muffler |
| CN104167203A (en) * | 2014-08-07 | 2014-11-26 | 四川正升声学科技有限公司 | Broadband sheet type silencer |
| CN105023568A (en) * | 2015-07-23 | 2015-11-04 | 钱永波 | Cooperative-spectrum sound wave eliminating cavity and damping method |
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