CN107170436A - A kind of collapsible resonance noise reduction method and set composite - Google Patents
A kind of collapsible resonance noise reduction method and set composite Download PDFInfo
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- CN107170436A CN107170436A CN201710617732.9A CN201710617732A CN107170436A CN 107170436 A CN107170436 A CN 107170436A CN 201710617732 A CN201710617732 A CN 201710617732A CN 107170436 A CN107170436 A CN 107170436A
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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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- 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
- G10K11/162—Selection of materials
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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
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
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Abstract
The invention discloses a kind of collapsible resonance noise reduction method, including folding resistive noise reduction method, resonance resistant noise-reducing method, a kind of set composite of collapsible resonance noise reduction method includes noise spectrum test system (101) and collapsible resistive silencing means (102) two parts；The noise spectrum test system (101) includes noise source (50), sound level meter (51), high-speed data acquisition card NI (52), computer (53), the time-domain diagram (54) of noise, the frequency domain figure (55) of noise；The resistive silencing means of stacked (102) includes：First bi-level resonant chamber (2), the second bi-level resonant chamber (3), the 3rd bi-level resonant chamber (4), the 4th bi-level resonant chamber (5), the first folding channel (19), second folding channel (20) etc..The present invention carries out resistance sound-absorbing using four resonator chambers, and resistive sound-absorbing is carried out using folding channel and porous sound absorbing material, so as to reach the effect eliminated the noise.
Description
Technical field
The present invention relates to the silencing means of noise and method, a kind of collapsible resonance noise reduction method is particularly suitable for use in being combined
Device.
Background technology
Muffler is to allow air-flow to pass through, but can prevent or reduce a kind of device of sound transmission, is to eliminate air to move
The important measures of power noise.Muffler can stop the propagation of sound wave, it is allowed to which air-flow passes through, and be the effective work for controlling noise
Tool.Muffler species is a lot, but studies carefully its noise elimination mechanism, and six kinds of main types, i.e. resistive muffler it can be divided into again, is resisted
Property muffler, impedance complex formula muffler, microperforated panel muffler, aperture muffler and active muffler.
Existing muffler, uses impedance composite noise-cancelling theory mostly.Because complicated, weight is big, high-temperature oxydation
Absorb sound filler, high velocity air impact sound absorption filler, and the reason such as aqueous vapor infiltration sound absorption filler, muffler is easy to maintenance frequency occur
Numerous, soundproof effect is poor, situations such as usage cycles are short.
The content of the invention
Of the prior art not enough there is provided the collapsible resonance noise reduction method of one kind and compound dress in order to overcome by the present invention
Put.
The present invention is to be achieved through the following technical solutions：
A kind of collapsible resonance noise reduction method, including resistive folding noise reduction method, resonance two kinds, institute such as resistant noise-reducing method
Stating a kind of set composite of collapsible resonance noise reduction method includes：Noise spectrum test system (101) and collapsible resonance noise reduction
Device (102) two parts, the collapsible resonance silencing means (102) includes：Housing (1), the first bi-level resonant chamber (2),
Second bi-level resonant chamber (3), the 3rd bi-level resonant chamber (4), the 4th bi-level resonant chamber (5), first support (6), second
Support (7), the 3rd support (8), the 4th support (9), the first conduction pipe (10), the second conduction pipe (11), the 3rd conduction pipe (12),
4th conduction pipe (13), heat-resisting porous sound absorbing charges (14), the first air inlet (15), the second air inlet (16), the first outlet
Mouth (17), the second gas outlet (18), the first folding channel (19), the second folding channel (20)；The noise spectrum test system
(101) noise source (50), sound level meter (51), high-speed data acquisition card NI (52), computer (53), the time-domain diagram of noise are included
(54), the frequency domain figure (55) of noise；It is characterized in that：Sound level meter (51) is used with high-speed data acquisition card NI (52) electrically to be connected
Connect, high-speed data acquisition card NI (52) is with computer (53) using electric connection；
The bottom of the first bi-level resonant chamber (2) is fixedly arranged on housing (1) by first support (6), and second is double-deck
The bottom of resonator chamber (3) is fixedly arranged on housing (1) by second support (7), and the bottom of the 3rd bi-level resonant chamber (4) passes through
3rd support (8) is fixedly arranged on housing (1), and the bottom of the 4th bi-level resonant chamber (5) is fixedly arranged at housing by the 4th support (9)
(1) on, the first bi-level resonant chamber (2), the second bi-level resonant chamber (3), the 3rd bi-level resonant chamber (4), the 4th bilayer are altogether
Shake and the first resonance air admission hole (21), the second resonance air admission hole (22), the 3rd resonance air admission hole are had at the top of chamber (5)
(23), the 4th resonance air admission hole (24), the first resonance air admission hole (21) of the first bi-level resonant chamber (2) and the first conduction pipe
(10) one end consolidation, the other end of the first conduction pipe (10) is connected with the first folding channel (19)；Second bi-level resonant chamber
(3) the second resonance air admission hole (22) is consolidated with one end of the second conduction pipe (11), the other end of the second conduction pipe (11) and the
One folding channel (19) is connected；The 3rd resonance air admission hole (23) and the 3rd conduction pipe (12) of 3rd bi-level resonant chamber (4)
One end is consolidated, and the other end of the 3rd conduction pipe (12) is connected with the second folding channel (20)；The of 4th bi-level resonant chamber (5)
One end of four resonance air admission holes (24) and the 4th conduction pipe (13) is consolidated, and the other end of the 4th conduction pipe (13) and the second folding are logical
Road (20) is connected；
Compared with prior art, the beneficial effects of the invention are as follows：The present invention carries out resistance sound-absorbing using four resonant chambers,
Resistive sound-absorbing is carried out using the sound-absorbing material in folding channel, when noise enters the first bi-level resonant chamber (2), the second bilayer altogether
Shake chamber (3), the 3rd bi-level resonant chamber (4), the 4th bi-level resonant chamber (5) when, in noise gas with first it is double-deck altogether
Shake chamber (2), the second bi-level resonant chamber (3), the 3rd bi-level resonant chamber (4), the 4th bi-level resonant chamber (5) resonant frequency
Identical noise is decayed because of resonant heating, so as to reach the effect eliminated the noise.
Brief description of the drawings
Fig. 1 is resonant labyrinth silencing means schematic diagram, and Fig. 2 is noise spectrum test system, and Fig. 3 is the frequency domain of noise
Figure, Fig. 4 is the structure diagram of resonant labyrinth silencing means.
1. housing, 2. first bi-level resonant chambers, 3. second bi-level resonant chambers, 4. the 3rd bi-level resonant chambers, 5.
Four bi-level resonant chambers, 6. first supports, 7. second supports, 8. the 3rd supports, 9. the 4th supports, 10. first conduction pipes, 11.
Second conduction pipe, 12. the 3rd conduction pipes, 13. the 4th conduction pipes, 14. heat-resisting porous sound absorbing charges, 15. first air inlets,
Lead to 16. the second air inlet, 17. first gas outlets, 18. second gas outlets (18), 19. first folding channels, 20. second are folded
Road, 21. first resonance air admission holes, 22. second resonance air admission holes, 23. the 3rd resonance air admission holes, 24. the 4th resonance air admission holes,
50. noise source, 51. sound level meters, 52. high-speed data acquisition card NI, 53. computers, the time-domain diagram of 54. noises, the frequency of 55. noises
Domain figure, 101. noise spectrum test systems and 102. duct noise gas silencing means.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
A kind of collapsible resonance noise reduction method, including collapsible resistive noise absorbent method and resonator chamber resistant noise-reducing side
Method, is characterized in：A kind of set composite of collapsible resonance noise reduction method includes：Noise spectrum test system (101) and
Collapsible resonance silencing means (102) two parts, the collapsible resonance silencing means (102) includes：Housing (1), first pair
Layer resonator chamber (2), the second bi-level resonant chamber (3), the 3rd bi-level resonant chamber (4), the 4th bi-level resonant chamber (5), the
One support (6), second support (7), the 3rd support (8), the 4th support (9), the first conduction pipe (10), the second conduction pipe (11),
3rd conduction pipe (12), the 4th conduction pipe (13), heat-resisting porous sound absorbing charges (14), the first air inlet (15), the second air inlet
Mouth (16), the first gas outlet (17), the second gas outlet (18), the first folding channel (19), the second folding channel (20)；It is described to make an uproar
Audio frequency spectrum testing system (101) include noise source (50), sound level meter (51), high-speed data acquisition card NI (52), computer (53),
The time-domain diagram (54) of noise, the frequency domain figure (55) of noise；It is characterized in that：Sound level meter (51) and high-speed data acquisition card NI (52)
Using electric connection, high-speed data acquisition card NI (52) is with computer (53) using electric connection；
The bottom of the first bi-level resonant chamber (2) is fixedly arranged on housing (1) by first support (6), and second is double-deck
The bottom of resonator chamber (3) is fixedly arranged on housing (1) by second support (7), and the bottom of the 3rd bi-level resonant chamber (4) passes through
3rd support (8) is fixedly arranged on housing (1), and the bottom of the 4th bi-level resonant chamber (5) is fixedly arranged at housing by the 4th support (9)
(1) on, the first bi-level resonant chamber (2), the second bi-level resonant chamber (3), the 3rd bi-level resonant chamber (4), the 4th bilayer are altogether
Shake and the first resonance air admission hole (21), the second resonance air admission hole (22), the 3rd resonance air admission hole are had at the top of chamber (5)
(23), the 4th resonance air admission hole (24), the first resonance air admission hole (21) of the first bi-level resonant chamber (2) and the first conduction pipe
(10) one end consolidation, the other end of the first conduction pipe (10) is connected with the first folding channel (19)；Second bi-level resonant chamber
(3) the second resonance air admission hole (22) is consolidated with one end of the second conduction pipe (11), the other end of the second conduction pipe (11) and the
One folding channel (19) is connected；The 3rd resonance air admission hole (23) and the 3rd conduction pipe (12) of 3rd bi-level resonant chamber (4)
One end is consolidated, and the other end of the 3rd conduction pipe (12) is connected with the second folding channel (20)；The of 4th bi-level resonant chamber (5)
One end of four resonance air admission holes (24) and the 4th conduction pipe (13) is consolidated, and the other end of the 4th conduction pipe (13) and the second folding are logical
Road (20) is connected；
A kind of stacked resonance noise reduction method includes：
1) method of testing of noise
As shown in Fig. 2 being acquired by sound level meter (51) to the vibration of noise source (50), sound level meter (51) is collected
Signal be transferred to high-speed data acquisition card NI (52), computer (53) and handled, and then obtain noise time-domain diagram (54),
Fast Fourier Transform (FFT) is carried out to the time-domain diagram (54) of noise again, the frequency domain figure (55) of noise is obtained, as shown in Figure 3.
2) recognition methods that noise master shakes
As shown in figure 3, the longitudinal axis represents the sound intensity of noise, represented with acoustic pressure, unit is millivolt, transverse axis is the vibration frequency of noise
Rate, unit is Hz；Four masters of noise shake, and are eliminated using four resonator chambers；
A, in figure 3, the maximum vibration of three vibration amplitudes is shaken for three masters of noise, as Fig. 3 marks the four of 1,2,3,4
Individual vibration is shaken for three masters of noise, and corresponding noise frequency is f1, f2, f3, f4 respectively, designs four various sizes of first
Bi-level resonant chamber (2), the second bi-level resonant chamber (3), the 3rd bi-level resonant chamber (4), the 4th bi-level resonant chamber (5),
So that the resonant frequency of four various sizes of bi-level resonant chambers respectively falls in f1* (1 ± 10%), f2* (1 ± 10%), f3*
(1 ± 10%), f4* (1 ± 10%) vibration frequency band, using resonator chamber frequency it is identical with the master oscillator frequenc of noise when occur altogether
The principle shaken, carrys out noise reduction to eliminate the noise that frequency is f1, f2, f3, f4 respectively；
B, porous sound absorbing material is utilized to carry out noise reduction to the noise of remaining frequency.
3) a kind of collapsible resistive noise absorbent method of collapsible resonance noise reduction method includes：
When noise gas enters the position A of the first folding channel (19) from the first air inlet (15), a part of noise to
Reflection is returned, another part noise is absorbed by heat-resisting porous sound absorbing charges (14), and some noise is turned back, to first
The position B of folding channel (19) sets out；When the position A of noise gas from the first folding channel (19) moves to the first folding channel
(19) during position B, a part of noise is reflected back, and another part noise is absorbed by heat-resisting porous sound absorbing charges (14), also
Some noise is turned back, and is seted out to the position C of the first folding channel (19)；When noise gas is from the first folding channel
(19) when position B moves to the position C of the first folding channel (19), a part of noise is reflected back, another part noise quilt
Heat-resisting porous sound absorbing charges (14) are absorbed, and some noise is turned back, and the position D to the first folding channel (19) enters
Hair；When the position C of noise gas from the first folding channel (19) moves to the position D of the first folding channel (19), a part
Noise is reflected back, and another part noise is absorbed by heat-resisting porous sound absorbing charges (14), and some noise is turned back,
After the first gas outlet (17), housing (1) is discharged to outside；
When noise gas enters the position a of the second folding channel (20) from the second air inlet (16), a part of noise to
Reflection is returned, another part noise is absorbed by heat-resisting porous sound absorbing charges (14), and some noise is turned back, to second
The position b of folding channel (20) sets out；When the position a of noise gas from the second folding channel (20) moves to the second folding channel
(20) during position b, a part of noise is reflected back, and another part noise is absorbed by heat-resisting porous sound absorbing charges (14), also
Some noise is turned back, and is seted out to the position c of the second folding channel (20)；When noise gas is from the second folding channel
(20) when position b moves to the position c of the second folding channel (20), a part of noise is reflected back, another part noise quilt
Heat-resisting porous sound absorbing charges (14) are absorbed, and some noise is turned back, and the position d to the second folding channel (20) enters
Hair；When the position c of noise gas from the second folding channel (20) moves to the position d of the second folding channel (20), a part
Noise is reflected back, and another part noise is absorbed by heat-resisting porous sound absorbing charges (14), and some noise is turned back,
After the second gas outlet (18), housing (1) is discharged to outside；
4) a kind of resonator chamber resistant noise-reducing method of collapsible resonance noise reduction method includes：
When noise gas passes through folding channel, after the entrance for reaching resonator chamber, the noise consistent with resonator chamber frequency
Resonate, the noise of the frequency changes into thermal energy consumption and dissipated；The resonance noise reduction method of resonator chamber comprises the following steps：
A, the master oscillator frequenc f1 according to noise gas, determine the size of the first bi-level resonant chamber (2) so that first is double-deck
The master oscillator frequenc of resonator chamber (2) is fallen into f1 vibration frequency band, when the noise gas that frequency is f1, by the first folding channel
(19) when, by first bi-level resonant chamber (2) entrance, noise gas and the first bi-level resonant chamber that frequency is f1 are caused
(2) resonate so that frequency changes into thermal energy consumption for f1 noises and dissipated, so that frequency is attenuated for f1 noise；
B, the master oscillator frequenc f2 according to noise gas, determine the size of the second bi-level resonant chamber (3) so that second is double-deck
The master oscillator frequenc of resonator chamber (3) is fallen into f2 vibration frequency band, when the noise gas that frequency is f2, by the first folding channel
(19) when, by second bi-level resonant chamber (3) entrance, noise gas and the second bi-level resonant chamber that frequency is f2 are caused
(3) resonate so that frequency changes into thermal energy consumption for f2 noises and dissipated, so that frequency is attenuated for f2 noise；
C, the master oscillator frequenc f3 according to noise gas, determine the size of the 3rd bi-level resonant chamber (4) so that the 3rd is double-deck
The master oscillator frequenc of resonator chamber (4) is fallen into f3 vibration frequency band, when the noise gas that frequency is f3, by the second folding channel
(20) when, by the 3rd bi-level resonant chamber (4) entrance, noise gas and the 3rd bi-level resonant chamber that frequency is f3 are caused
(3) resonate so that frequency changes into thermal energy consumption for f3 noises and dissipated, so that frequency is attenuated for f3 noise；
D, the master oscillator frequenc f4 according to noise gas, determine the size of the 4th bi-level resonant chamber (5) so that the 4th is double-deck
The master oscillator frequenc of resonator chamber (5) is fallen into f4 vibration frequency band, when the noise gas that frequency is f4, by the second folding channel
(20) when, by the 4th bi-level resonant chamber (5) entrance, noise gas and the 4th bi-level resonant chamber that frequency is f4 are caused
(5) resonate so that frequency changes into thermal energy consumption for f4 noises and dissipated, so that frequency is attenuated for f4 noise.
A kind of collapsible resonance noise reduction method, is characterized in：First bi-level resonant chamber (2), the second bi-level resonant
Chamber (3), the 3rd bi-level resonant chamber (4), the material of the 4th bi-level resonant chamber (5) are stainless steel.
A kind of collapsible resonance noise reduction method, is characterized in：Heat-resisting porous sound absorbing charges (14) can be maintained at
300 DEG C of temperature-resistant shape.
A kind of collapsible resonance noise reduction method, is characterized in：First folding channel (19), the second folding channel
(20) model casting is used.
The set composite that a kind of collapsible resonance noise reduction method is used, including：Noise spectrum test system (101)
With collapsible resonance silencing means (102), it is characterized in：The collapsible resonance silencing means (102) includes：Housing (1), the
Pair of lamina resonator chamber (2), the second bi-level resonant chamber (3), the 3rd bi-level resonant chamber (4), the 4th bi-level resonant chamber
(5), first support (6), second support (7), the 3rd support (8), the 4th support (9), the first conduction pipe (10), the second conduction pipe
(11), the 3rd conduction pipe (12), the 4th conduction pipe (13), heat-resisting porous sound absorbing charges (14), the first air inlet (15), second
Air inlet (16), the first gas outlet (17), the second gas outlet (18), the first folding channel (19), the second folding channel (20)；Institute
Stating noise spectrum test system (101) includes noise source (50), sound level meter (51), high-speed data acquisition card NI (52), computer
(53), the frequency domain figure (55) of the time-domain diagram (54) of noise, noise；It is characterized in that：Sound level meter (51) and high-speed data acquisition card
NI (52) is using being electrically connected with, and high-speed data acquisition card NI (52) is with computer (53) using electric connection；
The bottom of the first bi-level resonant chamber (2) is fixedly arranged on housing (1) by first support (6), and second is double-deck
The bottom of resonator chamber (3) is fixedly arranged on housing (1) by second support (7), and the bottom of the 3rd bi-level resonant chamber (4) passes through
3rd support (8) is fixedly arranged on housing (1), and the bottom of the 4th bi-level resonant chamber (5) is fixedly arranged at housing by the 4th support (9)
(1) on, the first bi-level resonant chamber (2), the second bi-level resonant chamber (3), the 3rd bi-level resonant chamber (4), the 4th bilayer are altogether
Shake and the first resonance air admission hole (21), the second resonance air admission hole (22), the 3rd resonance air admission hole are had at the top of chamber (5)
(23), the 4th resonance air admission hole (24), the first resonance air admission hole (21) of the first bi-level resonant chamber (2) and the first conduction pipe
(10) one end consolidation, the other end of the first conduction pipe (10) is connected with the first folding channel (19)；Second bi-level resonant chamber
(3) the second resonance air admission hole (22) is consolidated with one end of the second conduction pipe (11), the other end of the second conduction pipe (11) and the
One folding channel (19) is connected；The 3rd resonance air admission hole (23) and the 3rd conduction pipe (12) of 3rd bi-level resonant chamber (4)
One end is consolidated, and the other end of the 3rd conduction pipe (12) is connected with the second folding channel (20)；The of 4th bi-level resonant chamber (5)
One end of four resonance air admission holes (24) and the 4th conduction pipe (13) is consolidated, and the other end of the 4th conduction pipe (13) and the second folding are logical
Road (20) is connected.
A kind of collapsible resonance muffling composite device, is characterized in：The first bi-level resonant chamber (2), second
Bi-level resonant chamber (3), the 3rd bi-level resonant chamber (4), the material of the 4th bi-level resonant chamber (5) are stainless steel.
A kind of collapsible resonance muffling composite device, is characterized in：Heat-resisting porous sound absorbing charges (14) energy
Enough it is maintained at 300 DEG C of temperature-resistant shape.
A kind of collapsible resonance muffling composite device, is characterized in：First folding channel (19), second fold
Passage (20) uses model casting.
The basic principles, principal features and advantages of the present invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, the original for simply illustrating the present invention described in above-described embodiment and specification
Reason, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (8)
1. a kind of collapsible resonance noise reduction method, including collapsible resistive noise absorbent method and resonator chamber resistant noise-reducing side
Method, is characterized in：A kind of set composite of collapsible resonance noise reduction method includes：Noise spectrum test system (101) and
Collapsible resonance silencing means (102) two parts, the collapsible resonance silencing means (102) includes：Housing (1), first pair
Layer resonator chamber (2), the second bi-level resonant chamber (3), the 3rd bi-level resonant chamber (4), the 4th bi-level resonant chamber (5), the
One support (6), second support (7), the 3rd support (8), the 4th support (9), the first conduction pipe (10), the second conduction pipe (11),
3rd conduction pipe (12), the 4th conduction pipe (13), heat-resisting porous sound absorbing charges (14), the first air inlet (15), the second air inlet
Mouth (16), the first gas outlet (17), the second gas outlet (18), the first folding channel (19), the second folding channel (20)；It is described to make an uproar
Audio frequency spectrum testing system (101) include noise source (50), sound level meter (51), high-speed data acquisition card NI (52), computer (53),
The time-domain diagram (54) of noise, the frequency domain figure (55) of noise；It is characterized in that：Sound level meter (51) and high-speed data acquisition card NI (52)
Using electric connection, high-speed data acquisition card NI (52) is with computer (53) using electric connection；
The bottom of the first bi-level resonant chamber (2) is fixedly arranged on housing (1) by first support (6), the second bi-level resonant
The bottom of chamber (3) is fixedly arranged on housing (1) by second support (7), and the bottom of the 3rd bi-level resonant chamber (4) passes through the 3rd
Support (8) is fixedly arranged on housing (1), and the bottom of the 4th bi-level resonant chamber (5) is fixedly arranged at housing (1) by the 4th support (9)
On, the first bi-level resonant chamber (2), the second bi-level resonant chamber (3), the 3rd bi-level resonant chamber (4), the 4th bi-level resonant chamber
Had at the top of room (5) the first resonance air admission hole (21), second resonance air admission hole (22), the 3rd resonance air admission hole (23),
4th resonance air admission hole (24), the first resonance air admission hole (21) and the first conduction pipe (10) of the first bi-level resonant chamber (2)
One end is consolidated, and the other end of the first conduction pipe (10) is connected with the first folding channel (19)；The of second bi-level resonant chamber (3)
One end of two resonance air admission holes (22) and the second conduction pipe (11) is consolidated, and the other end of the second conduction pipe (11) and the first folding are logical
Road (19) is connected；One end of the 3rd resonance air admission hole (23) and the 3rd conduction pipe (12) of 3rd bi-level resonant chamber (4) is consolidated,
The other end of 3rd conduction pipe (12) is connected with the second folding channel (20)；The 4th of 4th bi-level resonant chamber (5) resonate into
One end of stomata (24) and the 4th conduction pipe (13) is consolidated, and the other end and the second folding channel (20) of the 4th conduction pipe (13) are even
It is logical；
A kind of stacked resonance noise reduction method includes：
1) method of testing of noise
As shown in Fig. 2 being acquired by sound level meter (51) to the vibration of noise source (50), the letter that sound level meter (51) is collected
Number being transferred to high-speed data acquisition card NI (52), computer (53) is handled, and then obtains the time-domain diagram (54), right again of noise
The time-domain diagram (54) of noise carries out Fast Fourier Transform (FFT), obtains the frequency domain figure (55) of noise, as shown in Figure 3.
2) recognition methods that noise master shakes
As shown in figure 3, the longitudinal axis represents the sound intensity of noise, represented with acoustic pressure, unit is millivolt, transverse axis is the vibration frequency of noise,
Unit is Hz；Four masters of noise shake, and are eliminated using four resonator chambers；
A, in figure 3, the maximum vibration of three vibration amplitudes is shaken for three masters of noise, is shaken as Fig. 3 marks four of 1,2,3,4
Move and shaken for three masters of noise, corresponding noise frequency is f1, f2, f3, f4 respectively, design four various sizes of first is double-deck
Resonator chamber (2), the second bi-level resonant chamber (3), the 3rd bi-level resonant chamber (4), the 4th bi-level resonant chamber (5) so that
The resonant frequency of four various sizes of bi-level resonant chambers respectively fall in f1* (1 ± 10%), f2* (1 ± 10%), f3* (1 ±
10%), f4* (1 ± 10%) vibration frequency band, is resonated using resonator chamber frequency when identical with the master oscillator frequenc of noise
Principle, carrys out noise reduction to eliminate the noise that frequency is f1, f2, f3, f4 respectively；
B, porous sound absorbing material is utilized to carry out noise reduction to the noise of remaining frequency.
3) a kind of collapsible resistive noise absorbent method of collapsible resonance noise reduction method includes：
When noise gas enters the position A of the first folding channel (19) from the first air inlet (15), a part of noise is anti-to returning
Penetrate, another part noise is absorbed by heat-resisting porous sound absorbing charges (14), and some noise is turned back, folded to first
The position B of passage (19) sets out；When the position A of noise gas from the first folding channel (19) moves to the first folding channel (19)
Position B when, a part of noise is reflected back, and another part noise is absorbed by heat-resisting porous sound absorbing charges (14), also one
Partial noise is turned back, and is seted out to the position C of the first folding channel (19)；When noise gas is from the first folding channel (19)
When position B moves to the position C of the first folding channel (19), a part of noise is reflected back, and another part noise is by heat-resisting more
Hole sound-absorbing charges (14) are absorbed, and some noise is turned back, seted out to the position D of the first folding channel (19)；When
When the position C of noise gas from the first folding channel (19) moves to the position D of the first folding channel (19), a part of noise to
Reflection is returned, another part noise is absorbed by heat-resisting porous sound absorbing charges (14), and some noise is turned back, through first
Behind gas outlet (17), housing (1) is discharged to outside；
When noise gas enters the position a of the second folding channel (20) from the second air inlet (16), a part of noise is anti-to returning
Penetrate, another part noise is absorbed by heat-resisting porous sound absorbing charges (14), and some noise is turned back, folded to second
The position b of passage (20) sets out；When the position a of noise gas from the second folding channel (20) moves to the second folding channel (20)
Position b when, a part of noise is reflected back, and another part noise is absorbed by heat-resisting porous sound absorbing charges (14), also one
Partial noise is turned back, and is seted out to the position c of the second folding channel (20)；When noise gas is from the second folding channel (20)
When position b moves to the position c of the second folding channel (20), a part of noise is reflected back, and another part noise is by heat-resisting more
Hole sound-absorbing charges (14) are absorbed, and some noise is turned back, seted out to the position d of the second folding channel (20)；When
When the position c of noise gas from the second folding channel (20) moves to the position d of the second folding channel (20), a part of noise to
Reflection is returned, another part noise is absorbed by heat-resisting porous sound absorbing charges (14), and some noise is turned back, through second
Behind gas outlet (18), housing (1) is discharged to outside；
4) a kind of resonator chamber resistant noise-reducing method of collapsible resonance noise reduction method includes：
When noise gas passes through folding channel, after the entrance for reaching resonator chamber, the noise consistent with resonator chamber frequency occurs
Resonance, the noise of the frequency changes into thermal energy consumption and dissipated；The resonance noise reduction method of resonator chamber comprises the following steps：
A, the master oscillator frequenc f1 according to noise gas, determine the size of the first bi-level resonant chamber (2) so that the first bi-level resonant
The master oscillator frequenc of chamber (2) is fallen into f1 vibration frequency band, when the noise gas that frequency is f1, by the first folding channel
(19) when, by first bi-level resonant chamber (2) entrance, noise gas and the first bi-level resonant chamber that frequency is f1 are caused
(2) resonate so that frequency changes into thermal energy consumption for f1 noises and dissipated, so that frequency is attenuated for f1 noise；
B, the master oscillator frequenc f2 according to noise gas, determine the size of the second bi-level resonant chamber (3) so that the second bi-level resonant
The master oscillator frequenc of chamber (3) is fallen into f2 vibration frequency band, when the noise gas that frequency is f2, by the first folding channel
(19) when, by second bi-level resonant chamber (3) entrance, noise gas and the second bi-level resonant chamber that frequency is f2 are caused
(3) resonate so that frequency changes into thermal energy consumption for f2 noises and dissipated, so that frequency is attenuated for f2 noise；
C, the master oscillator frequenc f3 according to noise gas, determine the size of the 3rd bi-level resonant chamber (4) so that the 3rd bi-level resonant
The master oscillator frequenc of chamber (4) is fallen into f3 vibration frequency band, when the noise gas that frequency is f3, by the second folding channel
(20) when, by the 3rd bi-level resonant chamber (4) entrance, noise gas and the 3rd bi-level resonant chamber that frequency is f3 are caused
(3) resonate so that frequency changes into thermal energy consumption for f3 noises and dissipated, so that frequency is attenuated for f3 noise；
D, the master oscillator frequenc f4 according to noise gas, determine the size of the 4th bi-level resonant chamber (5) so that the 4th bi-level resonant
The master oscillator frequenc of chamber (5) is fallen into f4 vibration frequency band, when the noise gas that frequency is f4, by the second folding channel
(20) when, by the 4th bi-level resonant chamber (5) entrance, noise gas and the 4th bi-level resonant chamber that frequency is f4 are caused
(5) resonate so that frequency changes into thermal energy consumption for f4 noises and dissipated, so that frequency is attenuated for f4 noise.
2. a kind of collapsible resonance noise reduction method as claimed in claim 1, is characterized in：First bi-level resonant chamber (2),
Two bi-level resonant chambers (3), the 3rd bi-level resonant chamber (4), the material of the 4th bi-level resonant chamber (5) are stainless steel.
3. a kind of collapsible resonance noise reduction method as claimed in claim 1, is characterized in：Heat-resisting porous sound absorbing charges (14)
300 DEG C of temperature-resistant shape can be maintained at.
4. a kind of collapsible resonance noise reduction method as claimed in claim 1, is characterized in：First folding channel (19),
Second folding channel (20) uses model casting.
5. the set composite that a kind of collapsible resonance noise reduction method as claimed in claim 1 is used, including：Noise spectrum is surveyed
Test system (101) and collapsible resonance silencing means (102), are characterized in：Collapsible resonance silencing means (102) bag
Include：Housing (1), the first bi-level resonant chamber (2), the second bi-level resonant chamber (3), the 3rd bi-level resonant chamber (4), the 4th pair
Layer resonator chamber (5), first support (6), second support (7), the 3rd support (8), the 4th support (9), the first conduction pipe (10),
Second conduction pipe (11), the 3rd conduction pipe (12), the 4th conduction pipe (13), heat-resisting porous sound absorbing charges (14), the first air inlet
Mouth (15), the second air inlet (16), the first gas outlet (17), and the second gas outlet (18), the first folding channel (19), second folds
Passage (20)；The noise spectrum test system (101) includes noise source (50), sound level meter (51), high-speed data acquisition card NI
(52), computer (53), the time-domain diagram (54) of noise, the frequency domain figure (55) of noise；It is characterized in that：Sound level meter (51) and high speed
Data collecting card NI (52) is using being electrically connected with, and high-speed data acquisition card NI (52) is with computer (53) using electric connection；
The bottom of the first bi-level resonant chamber (2) is fixedly arranged on housing (1) by first support (6), the second bi-level resonant
The bottom of chamber (3) is fixedly arranged on housing (1) by second support (7), and the bottom of the 3rd bi-level resonant chamber (4) passes through the 3rd
Support (8) is fixedly arranged on housing (1), and the bottom of the 4th bi-level resonant chamber (5) is fixedly arranged at housing (1) by the 4th support (9)
On, the first bi-level resonant chamber (2), the second bi-level resonant chamber (3), the 3rd bi-level resonant chamber (4), the 4th bi-level resonant chamber
Had at the top of room (5) the first resonance air admission hole (21), second resonance air admission hole (22), the 3rd resonance air admission hole (23),
4th resonance air admission hole (24), the first resonance air admission hole (21) and the first conduction pipe (10) of the first bi-level resonant chamber (2)
One end is consolidated, and the other end of the first conduction pipe (10) is connected with the first folding channel (19)；The of second bi-level resonant chamber (3)
One end of two resonance air admission holes (22) and the second conduction pipe (11) is consolidated, and the other end of the second conduction pipe (11) and the first folding are logical
Road (19) is connected；One end of the 3rd resonance air admission hole (23) and the 3rd conduction pipe (12) of 3rd bi-level resonant chamber (4) is consolidated,
The other end of 3rd conduction pipe (12) is connected with the second folding channel (20)；The 4th of 4th bi-level resonant chamber (5) resonate into
One end of stomata (24) and the 4th conduction pipe (13) is consolidated, and the other end and the second folding channel (20) of the 4th conduction pipe (13) are even
It is logical.
6. a kind of collapsible resonance muffling composite device as claimed in claim 5, is characterized in：The first bi-level resonant chamber
Room (2), the second bi-level resonant chamber (3), the 3rd bi-level resonant chamber (4), the material of the 4th bi-level resonant chamber (5) are stainless
Steel.
7. a kind of collapsible resonance muffling composite device as claimed in claim 5, is characterized in：The heat-resisting porous sound absorbing fills
300 DEG C of temperature-resistant shape can be maintained at by filling out thing (14).
8. a kind of collapsible resonance muffling composite device as claimed in claim 5, is characterized in：First folding channel
(19), the second folding channel (20) uses model casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710617732.9A CN107170436A (en) | 2017-07-26 | 2017-07-26 | A kind of collapsible resonance noise reduction method and set composite |
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| CN201710617732.9A CN107170436A (en) | 2017-07-26 | 2017-07-26 | A kind of collapsible resonance noise reduction method and set composite |
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| CN107170436A true CN107170436A (en) | 2017-09-15 |
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ID=59817341
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| CN201710617732.9A Withdrawn CN107170436A (en) | 2017-07-26 | 2017-07-26 | A kind of collapsible resonance noise reduction method and set composite |
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| CN (1) | CN107170436A (en) |
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| CN108151283A (en) * | 2017-12-04 | 2018-06-12 | 北京小米移动软件有限公司 | Prepare method, silencing means and the air purifier of silencing means |
| CN112227237A (en) * | 2020-11-10 | 2021-01-15 | 广州地铁设计研究院股份有限公司 | Sound barrier containing air resonant cavity |
| CN112963080A (en) * | 2021-02-26 | 2021-06-15 | 南通海鹰门窗安装工程有限公司 | Aluminum alloy window with steering structure |
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