CN202100299U - Silencer - Google Patents
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- CN202100299U CN202100299U CN2011202093568U CN201120209356U CN202100299U CN 202100299 U CN202100299 U CN 202100299U CN 2011202093568 U CN2011202093568 U CN 2011202093568U CN 201120209356 U CN201120209356 U CN 201120209356U CN 202100299 U CN202100299 U CN 202100299U
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Abstract
The utility model relates to noise control and provides a silencer. The silencer comprises at least one silencing unit which comprises a partition board and a spiral structure. The periphery of the partition board is fixed with a casing, and a cavity body is partitioned axially by the partition board. A through hole is arranged on the partition board. A plane spiral line serves as a cross sectional contour line. The spiral structure is in an annular shape with an inner hole, and one optional cross section is matched with the cross sectional contour line. The spiral structure is fixed on the lateral side of an outlet side of the partition board. A spiral silencing cavity is defined by the spiral structure, the partition board and the casing, and an opening of the spiral silencing cavity faces to the end of the outlet. The spiral silencing cavity is communicated with a cavity body on the outlet side of the partition board. An air hole for communicating cavity bodies on two sides of the partition board is formed by the through hole and the inner hole. Expanded silencing can be obtained by the partition board, the spiral structure increases reflecting probability and can capture sound waves, and silencing can be obtained by dispersion, absorption and offsetting interference of the sound waves. Frequency spectrum performance is good, the dependence of the expanded silencing capacity on expansion ratio is reduced, the radial size is small, and the structural performance is good. The air flow flows in a straight line or in a wave line. The aerodynamic property is good.
Description
Technical field
The utility model relates to noise control, especially a kind of silencing apparatus.
Background technique
Silencing apparatus is a device of subduing pneumatic noise; With its be installed in the pipeline or the inlet and outlet mouth on; When air communication is crossed, noise is had certain consumption, its performance mainly comprises three aspects: one, acoustic attenuation performance comprises the size and the spectral characteristic of sound deadening capacity; Two, aerodynamic quality is normally represented with the total head difference of silencing apparatus entrance and exit; Three, structural behaviour is meant its boundary dimension, firm degree, maintenance requirement, working life etc.Estimate the performance of above-mentioned three aspects of silencing apparatus, not only interknit but also condition each other, consider that from the acoustic attenuation performance of silencing apparatus the sound deadening capacity in required frequency range is the bigger the better; But must consider the requirement of aerodynamic quality simultaneously.For example, the exhaust silencer of car combustion engine, excessive if resistance is decreased, power loss is increased, increase oil consumption, even influence vehicle driving.When taking into account silencing apparatus acoustical behavior and aerodynamic quality, also must consider the requirement of structural behaviour, not only durable, also should avoid situation such as volume is excessive, difficult installation.
The kind of silencing apparatus is a lot, but studies carefully its noise elimination mechanism, mainly comprises following three kinds: dissipative muffler, reactive muffler, impedance complex formula silencing apparatus.Wherein, dissipative muffler is a kind of absorption-type silencing apparatus, when it utilizes sound wave in sound-absorbing porous material, to propagate, eliminates the noise because of friction is converted into heat energy with acoustic energy; Reactive muffler does not use sound-absorbing material; It relies on the sudden change or other of pipeline section to connect that resonant cavity etc. causes in the propagation of sound process that impedance changes and the reflection, interference and the resonance sound-absorbing that produce acoustic energy reduces silencing apparatus to extraradial acoustic energy, reaches the purpose of noise elimination; Impedance complex formula silencing apparatus constitutes resistive combining through appropriate configuration with two kinds of noise-cancelling theorys of resistance.Because dissipative muffler and impedance complex formula silencing apparatus all are added with sound-absorbing material; These sound-absorbing materials are prone to stop up and acoustic attenuation performance is descended by the high-temp waste gas fusing or by charcoal cigarette, greasy filth; Therefore, existing exhaust silencer for internal-combustion engine mainly adopts reactive muffler.
The corresponding above-mentioned unexpected expansion of pipeline section or the reactive muffler that contraction causes acoustic impedance sudden change in the passage of utilizing; Be called expansion chamber or expansion cell-type; Form by pipe and chamber, make along the sound wave of some frequency of pipe transmmision and can't pass silencing apparatus and the reflected back sound source is gone.
Corresponding above-mentioned side connects the reactive muffler of resonant cavity, is called the resonance cavate, is communicated with outside closed cavity and is constituted by the tube wall perforate, and the similar piston of the gas column on the tube wall in the little pore-throat has certain acoustical mass; The similar pneumatic spring of closed cavity has certain acoustic compliance; Air vibrates in aperture with the pore-throat wall and exists friction and damping function, has certain acoustic resistance.Acoustical mass, acoustic compliance and acoustic resistance just constitute acoustic vibration system at air-flow path like this, and their inductance, electric capacity and resistance on electricity constitutes resonance circuitry.
Existing reactive muffler constitutes by six kinds of reactive muffling unit combination, the structure of each unit as Fig. 1 from top to bottom, from left to right shown in, be followed successively by import interpolation pipe, outlet interpolation pipe, straight-through perforated pipe, perforated plate, reverse expansion, the reverse contraction.Wherein import interpolation pipe, outlet interpolation pipe, reverse expansion, the reverse contraction are expansion chamber, and import interpolation pipe, outlet interpolation pipe are used for the air-flow streamlined flow, reverse expansion, oppositely shrink that to be used for air-flow reverse; Straight-through perforated pipe can be that expansion chamber also can be the resonance cavate according to its perforation situation; Perforated plate then mainly is in order to reduce the spray noise of air-flow velocity, elimination high velocity air; During use, directly connect or cross over other unit through straight tube and connect in each unit.
Because the resonance cavate is eliminated the noise, when system natural frequency and frequency of sound wave generation resonance, the acoustic energy of consumption is maximum, and sound deadening capacity is maximum; When departing from, descend rapidly, the noise elimination frequency band narrow range, and micropore is prone to stop up therefore less employing in exhaust silencer for internal-combustion engine.Existing exhaust silencer for internal-combustion engine adopts the expansion chamber unit usually and cooperates the mazy type air flow path, and as shown in Figure 2 is a kind of typical motor exhaust silencer.Because the sound deadening capacity size that expansion chamber is eliminated the noise is by divergence ratio decision, the frequency of noise elimination characteristic length decision by expansion, therefore in order to obtain big sound deadening capacity, good spectral characteristic, existing exhaust silencer for internal-combustion engine is structural all relatively poor; The expansion chamber silencing apparatus is because the expansion and the contraction of channel cross-section will make drag losses increase, particularly when airspeed is higher; Aerodynamic quality can degenerate; The mazy type air flow path can increase vapour lock equally simultaneously, so exhaust resistance is big, and aerodynamic quality is poor; The I. C. engine exhaust back pressure is high, causes internal-combustion engine power consumption penalty, oil consumption to increase.
The model utility content
The utility model technical problem to be solved provides a kind of under the prerequisite that guarantees sound deadening capacity, spectral characteristic, the better silencing apparatus of aerodynamic quality and structural behaviour.
The utility model solves the technological scheme that its technical problem adopted: silencing apparatus; Comprise by suppressor case and surround the cavity that constitutes, the silencing apparatus entrance and exit that lays respectively at the axial two ends of cavity; Be provided with at least one noise elimination unit in the cavity, the upstream side of arbitrfary point all is positioned at the silencing apparatus inlet side of this point, the silencing apparatus outlet side that the downstream side all is positioned at this point on the air flow path; Said noise elimination unit comprises dividing plate, helix structure; Be fixedly connected and the axial cavity that cuts off with housing around the said dividing plate, dividing plate is provided with through hole; With the snail line of coiling from outside to inside as range line profile, said helix structure integral body in the form of a ring and the shape of its arbitrary cross-section and range line profile adapt; Said helix structure is fixed in the corresponding silencing apparatus of dividing plate and exports on the side of a side, and along the cavity axis projection, the projection plane of said helix structure is positioned at the projection plane of dividing plate; The wall encirclement adjacent with through hole by helix structure constitutes endoporus, is made up of the pore that is communicated with dividing plate both sides cavity through hole and endoporus; Surround by helix structure, dividing plate, housing and to constitute the spiral noise elimination cavity that section configuration and profiled outline wire shaped adapt; By helix structure with housing between the annular space constitute the spiral noise elimination cavity opening that is communicated with spiral noise elimination cavity and dividing plate downstream side cavity, and spiral noise elimination cavity opening is positioned on the direction of propagation of sound wave after dividing plate downstream side adjacent structure reflects.
Further, the through hole of each cell separators of eliminating the noise is all coaxial with the silencing apparatus outlet.
Further, each section spiral size of helix structure is consistent.
Further, said helix structure endoporus is coaxial with corresponding bulkhead through-hole.
Further, said pore hole wall is a smooth surface.
Further, the range line profile of said helix structure is polyline shaped side's helix of 90 ° for the adjacent edge angle.
Further; Said silencing apparatus inlet comprises the conically shaped between mouthpiece, mouthpiece and the housing; Be provided with perpendicular to the axial stringer board of cavity in the tube chamber of said conically shaped; Cavity is communicated with mouthpiece with gap between the conically shaped barrel through stringer board, and this gap and adjacent bulkhead through-hole stagger.
Further, be provided with at least two stringer boards, each stringer board is provided with at interval, and plays each stringer board height by mouthpiece and increase progressively.
The beneficial effect of the utility model is: the sound deadening capacity size that existing expansion chamber is eliminated the noise is determined by the length of expansion by divergence ratio decision, frequency of noise elimination characteristic.And at first eliminate the noise through expansion chamber in the noise elimination unit of the utility model silencing apparatus, increases the reflection probability of sound wave and to the catching of sound wave, offset the decay that realizes sound wave through dispersion, absorption, the interference of sound wave through helix structure simultaneously; Helix structure catch the spectral performance that mechanism has effectively guaranteed its noise elimination; And sound deadening capacity and divergence ratio do not have positive connection, can significantly reduce the dependence of sound deadening capacity to divergence ratio, the radial dimension of the unit that can significantly reduce to eliminate the noise; And then significantly reduce the radial dimension of silencing apparatus; The acoustic wave filter structure performance is better, and the vapour lock that reduces to reduce air-flow of divergence ratio is improved aerodynamic quality; Dividing plate is fixed in housing and cavity is axially cut off; According to noise elimination cell separators through holes at different levels the difference of position is set, air-flow in cavity linearly, the waveform linear flow is moving, avoided the setting of mazy type gas channel; Therefore vapour lock further reduces, and aerodynamic quality further improves.
Description of drawings
Fig. 1 is the schematic representation of existing reactive muffler basic structural unit;
Fig. 2 is the structural representation of existing reactive muffler;
Fig. 3 is the utility model embodiment one a structural representation;
Fig. 4 is the axial arrangement schematic representation of the utility model embodiment one dividing plate, helix structure.
Embodiment
The silencing apparatus of the utility model; Comprise by silencing apparatus 3 housings 31 and surround the cavity 5 that constitutes, silencing apparatus 3 entrance and exits 32 that lay respectively at cavity 5 axial two ends; Be provided with at least one noise elimination unit in the cavity 5, the upstream side of arbitrfary point all is positioned at the silencing apparatus inlet side of this point on the air flow path, the silencing apparatus that the downstream side all is positioned at this point exports 32 sides; Said noise elimination unit comprises dividing plate 1, helix structure 2; Be fixedly connected and the axial cavity 5 that cuts off with housing 31 around the said dividing plate 1, dividing plate 1 is provided with through hole 11; With the snail line of coiling from outside to inside as range line profile, said helix structure 2 integral body in the form of a ring and the shape of its arbitrary cross-section and range line profile adapt; Said helix structure 2 is fixed on the side of dividing plate 1 corresponding silencing apparatus 3 outlets 32 1 sides, and along cavity 5 axis projections, the projection plane of said helix structure 2 is positioned at the projection plane of dividing plate 1; Constitute endoporus 24 by helix structure 2 and through hole 11 adjacent walls encirclements, constitute the pore that is communicated with dividing plate 1 both sides cavity 5 by through hole 11 and endoporus 24; Surround by helix structure 2, dividing plate 1, housing 31 and to constitute the spiral noise elimination cavity 21 that section configuration and profiled outline wire shaped adapt; By helix structure 2 with housing 31 between the annular space constitute spiral noise elimination cavity 21 openings that are communicated with spiral noise elimination cavity 21 and dividing plate 1 downstream side cavity 5, and spiral noise elimination cavity 21 openings are positioned on the direction of propagation of sound wave after dividing plate 1 downstream side adjacent structure reflects.
Its noise-cancelling theory mainly is: sound wave is propagated forward, and via through holes 11, endoporus 24 are radially expanding outwardly the formation abrupt change of cross-section after carrying out in the cavity 5 of corresponding silencing apparatus 3 outlets of dividing plate 1 32 1 sides when propagating forward; Sound wave is by dividing plate 1 downstream side adjacent structure retroeflection, so between the dividing plate 1 downstream side adjacent structure, between dividing plate 1 downstream side adjacent structure and the helix structure 2 by constantly reflection, and then disperse, absorb, interfere and offset; Spiral noise elimination cavity 21 openings are positioned at sound wave on the direction of propagation after the dividing plate 1 downstream side adjacent structure reflection; Therefore acoustic wave segment gets into spiral noise elimination cavity 21 by opening after reflection; The reflection probability of sound wave in spiral noise elimination cavity 21 is big, and because the self-enclosed property of helix structure 2, sound wave entering spiral noise elimination cavity 21 backs are offset, are absorbed by constantly reflection, interference; The probability that spreads out of once more is minimum, thereby realizes catching sound wave.
The sound deadening capacity size that existing expansion chamber is eliminated the noise is determined by the length of expansion by divergence ratio decision, frequency of noise elimination characteristic.And at first eliminate the noise through expansion chamber in the noise elimination unit of the utility model silencing apparatus 3, catches through the reflection probability of helix structure 2 increase sound waves and to sound wave simultaneously, offsets the decay that realizes sound wave through dispersion, absorption, the interference of sound wave; Helix structure 2 catch the spectral performance that mechanism has effectively guaranteed its noise elimination; And sound deadening capacity and divergence ratio do not have positive connection, can significantly reduce the dependence of sound deadening capacity to divergence ratio, the radial dimension of the unit that can significantly reduce to eliminate the noise; And then significantly reduce the radial dimension of silencing apparatus 3; Silencing apparatus 3 structural behaviours are better, and the vapour lock that reduces to reduce air-flow of divergence ratio is improved aerodynamic quality; Dividing plate 1 is fixed in housing 31 and cavity 5 is axially cut off; The upstream side of arbitrfary point all is positioned at the silencing apparatus inlet side of this point on the employing air flow path, the silencing apparatus that the downstream side all is positioned at this point exports 32 sides; Avoided the circuitous of air-flow to flow; Avoid the employing of mazy type air flow path, improved aerodynamic quality.
According to noise elimination cell separators 1 through holes 11 at different levels the difference of position is set, air-flow in cavity 5 linearly, the waveform linear flow is moving, avoided the setting of mazy type gas channel, so vapour lock further reduces, aerodynamic quality further improves.Wherein aerodynamic quality is best, and the through hole 11 of each cell separators 1 of eliminating the noise is all coaxial with silencing apparatus 3 outlets 32, and air-flow linearly flows in cavity 5.
Difference according to silencing apparatus 3 use occasions; Dividing plate 1 can adopt material different to process with helix structure 2, such as adopting sheet metal to process and constituting reactive muffler, adopt and inlay the sheet metal of sound-absorbing material or directly adopt sound-absorbing material to process and constitute impedance muffler.When sound-absorbing porous materials such as employing volcanic rock,, can significantly improve the sound absorption efficiency of sound-absorbing material through the reflection probability of helix structure 2 raising sound waves; When adopting metallic material; Helix structure 2 can be regarded a clockwork spring type spring as; Elastic telescopic through helix structure 2; Can significantly strengthen the absorption to sound wave, significantly improve sound deadening capacity, the helix structure 2 of ring-type then can effectively be avoided helix structure 2 to produce vibration through the distortional stress of self and form the regeneration noise.
The shape of above-mentioned helix structure 2 in the form of a ring; Can regard as and move the stero shape that constitutes along circular rails trace and adapt perpendicular to plane, range line profile place by range line profile; Wherein range line profile, trajectory according in the three-dimensional mapping through the plane of motion figure and move the principle that forms solid figure through planar graph and define, range line profile wherein is or consistent planar graph approximate with the planar graph of helix structure 2 sections; Trajectory promptly forms the line of definition range line profile mobile route in the stero shape process.Along helix structure 2 each section spiral size of trajectory can be consistent also can be inconsistent.The section spiral is not of uniform size when causing when each, can effectively increase the dispersion probability of reflective sound wave, but further design and the making of complicated this reactive muffling unit of this mode.Therefore, best, helix structure 2 each section spiral size are consistent.
Above-mentioned endoporus 24, through hole 11 can be coaxial, axes intersect, parallel axes stagger setting; But in order to obtain best aerodynamic quality; Best; Said helix structure 2 endoporus 24 are coaxial with corresponding dividing plate 1 through hole 11, and can also constitute interpolation pipe noise elimination unit with dividing plate 1 this moment through surrounding the collar wall 23 that constitutes endoporus 24, further improves the noise elimination spectral characteristic.
Helix structure 2 is fixed in the form of dividing plate 1, and seamed edge that can be through helix structure 2 corresponding range line profile outmost turns end points and near the internal surface the seamed edge, outer surface are weldingly fixed on the dividing plate 1, adopt same sheet metal through rolling one-body molded.Wherein preferred rolling one-body molded, rolling for ease, further, said pore hole wall is a smooth surface, also is that endoporus 24, through hole 11 joints are isometrical.At this moment, dividing plate 1 and helix structure 2 are connected as a single entity through the edge section, therefore can effectively guarantee the enforcement that one is rolling; Simultaneously, the seamed edge of helix structure 2 corresponding range line profile outmost turns end points apart from housing 31 farthest, helix structure 2 the space maximum is set, make things convenient for the setting of helix structure 2, guarantee that acoustic reflection carries out the probability of spiral noise elimination cavity 21.
Further, the range line profile of said helix structure 2 is polyline shaped side's helix of 90 ° for the adjacent edge angle, and square spiral is compared other spirals, designing and calculating, making most convenient; Simultaneously, the interpolation pipe noise elimination unit that is made up of collar wall 23 and dividing plate 1 can directly be with existing interpolation pipe and eliminate the noise theoretical.The flanging quantity of side's spiral is set according to application, noise elimination unit progression, silencing apparatus size, the preparation process of silencing apparatus; Adopt rolling when one-body molded; Best comprise four to six flangings; Wherein four flangings are in order to constitute at least one complete circle, to surpass six complexity that then can significantly increase preparation process.
In order to strengthen the high frequency performance of silencing apparatus 3; The airspeed that appropriateness control gets into cavity 5; Guarantee the acoustic attenuation performance of silencing apparatus 3, said silencing apparatus 3 inlets comprise the conically shaped 34 between mouthpiece 33, mouthpiece 33 and the housing 31, are provided with in the tube chamber of said conically shaped 34 perpendicular to the axial stringer board 4 of cavity 5; Cavity 5 is communicated with mouthpiece 33 with gap between conically shaped 34 barrels through stringer board 4, and this gap and adjacent dividing plate 1 through hole 11 stagger.Avoid directly pouring cavity 5 by the gas that mouthpiece 33 gets into through stringer board 4, stagger each other in through hole 11, gap, improve the acoustic attenuation performance of high frequency through the Sound shadow region of high frequency sound wave.In order to guarantee the control effect of airspeed, best, be provided with at least two stringer boards 4, each stringer board 4 is provided with at interval, and is highly increased progressively by 33 each stringer boards 4 of mouthpiece.
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Embodiment one
Like Fig. 3, shown in Figure 4; A kind of exhaust silencer for internal-combustion engine that is used for motorcycle; Comprise by silencing apparatus 3 housings 31 and surround the circular cylindrical cavity 5 that constitutes, silencing apparatus 3 entrance and exits 32 that lay respectively at cavity 5 axial two ends; Axially in cavity 5, be provided with Pyatyi noise elimination unit along cavity 5, said noise elimination unit comprises dividing plate 1, helix structure 2.
With from outside to inside the coiling plane side's helix as range line profile, range line profile comprises that five limits and adjacent edge angle are 90 °.The shape that helix structure 2 integral body are circular and its arbitrary cross-section is all consistent with range line profile, also is that helix structure 2 each section spiral size are consistent.Surrounded by the outer side wall of helix structure 2 corresponding range line profile outmost turns article one flangings 22 and to constitute the endoporus 24 isometrical with through hole 11, the madial wall 23 of the inner ring the last item flanging of helix structure 2 corresponding range line profiles is positioned at the side of outer side wall 22 away from endoporus 24.
Helix structure 2 forms through same stainless steel materials is rolling with dividing plate 1, and helix structure 2 is fixed on the side of dividing plate 1 corresponding silencing apparatus 3 outlets 32 1 sides; Along cavity 5 axis projections, the projection plane of helix structure 2 is positioned at the projection plane of dividing plate 1.Constitute the air flue 11 that is communicated with dividing plate 1 both sides cavity 5 by through hole and endoporus 24, dividing plate 1 links to each other with endoporus 24 edges through the through hole edge with helix structure 2, and endoporus 24 is coaxial with through hole, and air flue 11 is the cylndrical surface for uniform section hole, hole wall.Surround by helix structure 2, dividing plate 1, housing 31 and to constitute the spiral noise elimination cavity 21 that section configuration and profiled outline wire shaped adapt; By the opening that constitutes spiral noise elimination cavity 21 between helix structure 2 and the housing 31 with air flue 11 coaxial annular spaces; Spiral noise elimination cavity 21 is connected through the cavity 5 of opening with dividing plate 1 axial both sides middle outlet 32 1 sides, and opening is positioned at sound wave on the direction of propagation after dividing plate 1 downstream side adjacent separator 1, housing 31,35 reflections of silencing apparatus end plate.
In order further to improve aerodynamic quality, guarantee the spectral characteristic that silencing apparatus is good simultaneously, successively decrease along airflow direction air flue 11 apertures, also promptly along airflow direction, successively decrease in dividing plate 1 through hole of each unit of eliminating the noise, helix structure 2 endoporus apertures.
Said silencing apparatus 3 inlets comprise the conically shaped 34 between mouthpiece 33, mouthpiece 33 and the housing 31; Be provided with five stringer boards 4 that axially also are provided with at interval perpendicular to cavity 5 in the tube chamber of said conically shaped 34; Highly increase progressively by 33 each stringer boards 4 of mouthpiece; Cavity 5 is communicated with mouthpiece 33 with gap between conically shaped 34 barrels through each stringer board 4, and this gap and adjacent dividing plate 1 through hole stagger.
According to the difference of air, acoustic wave propagation mode, when guaranteeing acoustic attenuation performance, aerodynamic quality, structural behaviour have been improved.According to engineering experiment, under the approaching prerequisite that guarantees acoustic attenuation performance, because the raising of aerodynamic quality, oil consumption can reduce about 15%; Comparison diagram 2, owing to need not to adopt the mazy type gas path, and the reactive muffling unit is little to the divergence ratio requirement, so overall structure is little, and structural behaviour significantly improves.
Claims (8)
1. silencing apparatus comprises by silencing apparatus (3) housing (31) and surrounds the cavity (5) that constitutes, silencing apparatus (3) entrance and exit (32) that lays respectively at the axial two ends of cavity (5), is provided with at least one noise elimination unit in the cavity (5), it is characterized in that:
The upstream side of arbitrfary point all is positioned at the silencing apparatus inlet side of this point, silencing apparatus outlet (32) side that the downstream side all is positioned at this point on the air flow path;
Said noise elimination unit comprises dividing plate (1), helix structure (2);
Said dividing plate (1) is fixedly connected with housing (31) all around and axially cuts off cavity (5), and dividing plate (1) is provided with through hole (11);
With the snail line of coiling from outside to inside as range line profile, said helix structure (2) whole in the form of a ring and the shape of its arbitrary cross-section and range line profile adapt;
Said helix structure (2) is fixed on the side of the corresponding silencing apparatus of dividing plate (1) (3) outlet (32) one sides, and along cavity (5) axis projection, the projection plane of said helix structure (2) is positioned at the projection plane of dividing plate (1); Surround formation endoporus (24) by helix structure (2) wall adjacent, constitute the pore that is communicated with dividing plate (1) both sides cavitys (5) by through hole (11) and endoporus (24) with through hole (11); Surround by helix structure (2), dividing plate (1), housing (31) and to constitute the spiral noise elimination cavity (21) that section configuration and profiled outline wire shaped adapt; By helix structure (2) with housing (31) between the annular space constitute spiral noise elimination cavity (21) opening is communicated with spiral noise elimination cavity (21) and dividing plate (1) downstream side cavity (5), and spiral noise elimination cavity (21) opening is positioned on the direction of propagation of sound wave after dividing plate (1) downstream side adjacent structure reflects.
2. silencing apparatus as claimed in claim 1 is characterized in that: all same silencing apparatus of through hole (11) (3) outlet (32) of each cell separators of eliminating the noise (1) is coaxial.
3. silencing apparatus as claimed in claim 1 is characterized in that: each section spiral size of helix structure (2) is consistent.
4. silencing apparatus as claimed in claim 1 is characterized in that: said helix structure (2) endoporus (24) is coaxial with corresponding dividing plate (1) through hole (11).
5. silencing apparatus as claimed in claim 4 is characterized in that: said pore hole wall is a smooth surface.
6. like claim 1,2,3,4 or 5 described silencing apparatuss, it is characterized in that: the range line profile of said helix structure (2) is polyline shaped side's helix of 90 ° for the adjacent edge angle.
7. like claim 1,2,3,4 or 5 described silencing apparatuss; It is characterized in that: said silencing apparatus (3) inlet comprises the conically shaped (34) between mouthpiece (33), mouthpiece (33) and the housing (31); Be provided with perpendicular to the axial stringer board (4) of cavity (5) in the tube chamber of said conically shaped (34); Cavity (5) is communicated with the same mouthpiece in gap (33) between conically shaped (34) barrel through stringer board (4), and this gap and adjacent dividing plate (1) through hole (11) stagger.
8. silencing apparatus as claimed in claim 7 is characterized in that: be provided with at least two stringer boards (4), each stringer board (4) is provided with at interval, and is highly increased progressively by mouthpiece (33) each stringer board (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202093568U CN202100299U (en) | 2011-06-21 | 2011-06-21 | Silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202093568U CN202100299U (en) | 2011-06-21 | 2011-06-21 | Silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202100299U true CN202100299U (en) | 2012-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202093568U Expired - Fee Related CN202100299U (en) | 2011-06-21 | 2011-06-21 | Silencer |
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| Country | Link |
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| CN (1) | CN202100299U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106448647A (en) * | 2016-10-21 | 2017-02-22 | 武汉市发源发明推广有限公司 | Steam or gas special effect silencer |
| CN112503024A (en) * | 2020-11-02 | 2021-03-16 | 北京朗新明环保科技有限公司南京分公司 | Energy-saving and comprehensive noise-reducing fan pipeline and transformation method |
-
2011
- 2011-06-21 CN CN2011202093568U patent/CN202100299U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106448647A (en) * | 2016-10-21 | 2017-02-22 | 武汉市发源发明推广有限公司 | Steam or gas special effect silencer |
| CN112503024A (en) * | 2020-11-02 | 2021-03-16 | 北京朗新明环保科技有限公司南京分公司 | Energy-saving and comprehensive noise-reducing fan pipeline and transformation method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20140621 |
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| EXPY | Termination of patent right or utility model |