CN102606269B - Impedance composite muffler - Google Patents
Impedance composite muffler Download PDFInfo
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- CN102606269B CN102606269B CN 201210109752 CN201210109752A CN102606269B CN 102606269 B CN102606269 B CN 102606269B CN 201210109752 CN201210109752 CN 201210109752 CN 201210109752 A CN201210109752 A CN 201210109752A CN 102606269 B CN102606269 B CN 102606269B
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Abstract
The invention relates to a muffler, in particular to an impedance composite muffler, which comprises a primary muffler unit and a secondary muffler unit. The secondary muffler unit is made of lava, a shell encircles to form a cavity of the secondary muffler unit and is divided into an inlet-side cavity and an outlet-side cavity, the primary muffler unit is positioned in the inlet-side cavity and consists of an inner tube, one end of the inner tube is communicated with an inlet, the other end of the inner tube is connected with the secondary muffler unit, an integral row of primary holes is arranged on the inner tube, the inside and the outside of the inner tube are communicated with each other via the primary holes, an airflow channel is disposed on the secondary muffler unit, one end of the airflow channel is communicated with the inlet-side cavity between the inner tube and the shell, and the other end of the airflow channel is communicated with the outlet-side cavity. The impedance composite muffler has the advantages that an excellent muffler performance can be realized by means of combining an expansion muffler effect, a throttling pressure reduction muffler effect and a sound absorption effect, and the impedance composite muffler is convenient in processing and maintenance, low in manufacturing cost and fine in structural performance and aerodynamic performance. The impedance composite muffler is applicable to muffling of exhaust of engines and the like.
Description
Technical field
The present invention relates to silencing apparatus, especially a kind of impedance complex formula silencing apparatus.
Background technique
Silencing apparatus is that a kind of air-flow that allows passes through and the device of attenuate acoustic noise, be arranged in pipeline or the inlet and outlet mouth on.Muffler Performance mainly comprises three aspects: one, acoustic attenuation performance comprises size and the spectral characteristic of sound deadening capacity; Two, aerodynamic quality normally represents with the total head of silencing apparatus entrance and exit is poor; Three, structural behaviour refers to its boundary dimension, firmness 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 from the acoustic attenuation performance of silencing apparatus, the sound deadening capacity in required frequency range is the bigger the better; But must consider simultaneously the requirement of aerodynamic quality, for example: the exhaust silencer of internal-combustion engine, excessive if resistance is damaged, power loss is increased, increase oil consumption, even affect Vehicle Driving Cycle.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 the situations such as volume is excessive, installation difficulty.
The kind of silencing apparatus is a lot, but studies carefully its noise elimination mechanism, mainly comprises following three kinds:
One, dissipative muffler is a kind of energy absorption silencing apparatus, by fixing porous sound-absorbing material on the approach that passes through at air-flow, utilizes sound-absorbing porous material to friction and the damping function of sound wave, acoustic energy to be converted into heat energy, reaches the purpose of noise elimination; Sound-absorbing material commonly used has glass fiber, low carbon steel silk screen, felt etc.; According to the difference of sound-absorbing material set-up mode, resistance noise reduction structure commonly used comprises straighttube-type, chip, honeycomb, folded plate type, acoustic streaming formula, elbow, mazy type.
Two, reactive muffler utilizes the reflection of sound wave and interference effect etc., by changing the propagation characteristic of sound wave, hinders acoustic wave energy and outwards propagates, and mainly is suitable for eliminating narrow band noise low, medium frequency, and effect is relatively poor to wideband high-frequency rate noise; Reactive muffling is divided into expansion chamber and resonant cavity type according to noise-cancelling theory, and reactive muffling structure commonly used comprises: import interpolation pipe, outlet interpolation pipe, straight-through perforated pipe, perforated plate, oppositely expansion, the reverse contraction.
Three, impedance complex formula silencing apparatus, pass through the compound formation of appropriate configuration by resistive with two kinds of noise-cancelling theorys of resistance, impedance complex formula silencing apparatus commonly used has " resistive-expansion chamber combined type " silencing apparatus, " resistive-resonant cavity combined type " silencing apparatus, " resistive-expansion chamber-resonant cavity combined type " silencing apparatus and " microperforated panel " silencing apparatus.
Dissipative muffler is applicable to eliminate the noise of middle and high frequency, and noise elimination frequency band wider range, but relatively poor to the soundproof effect of low-frequency noise; Reactive muffler is applicable to eliminate the Low Medium Frequency noise, but relatively poor to the noise elimination effect of high frequency noise; And impedance complex formula silencing apparatus can obtain the soundproof effect in high, medium and low frequency range simultaneously.
The frequency band of I. C. engine exhaust noise is wider, therefore usually adopts impedance complex formula silencing apparatus.But because sound-absorbing material is easily melted by the high-temp waste gas that internal-combustion engine is discharged, cause working life short, and easily reduced or lose the noise elimination effect by the obstruction such as carbon deposit, greasy filth, therefore, be used for internal-combustion engine impedance complex formula silencing apparatus be mainly " microperforated panel " silencing apparatus.Take common cartridge type silencing apparatus as example, comprise outlet pipe, connection swivel nut, silencing pot and cylinder core, outlet pipe is connected with silencing pot and connects the swivel nut connection; In silencing pot, welding diaphragm is divided into a plurality of noise elimination cavities with its inner chamber, is provided with throttle orifice on dividing plate; Be provided with aperture on the cylinder core, be communicated with each noise elimination cavity by the cylinder core; Consist of respectively expansion chamber resistant noise elimination structure or resonant cavity type reactive muffling structure by each noise elimination cavity.During work, high-temp waste gas enters silencing pot through outlet pipe, and due to stopping of dividing plate, air-flow can only pass through from the throttle orifice on dividing plate and a cylinder core, so air-flow is through repeatedly compressing, shunt, expand, thus the purpose of realization reduction exhaust noise.But " microperforated panel " silencing apparatus, processed complex, cost is high, and the same problem of easily being blocked by carbon deposit, greasy filth etc. that exists.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of easy to process, cost is low, and can be used for equally the impedance complex formula silencing apparatus of I. C. engine exhaust noise elimination.
The technical solution adopted for the present invention to solve the technical problems is: impedance complex formula silencing apparatus, comprise housing, by housing surround the cavity consist of, lay respectively at the gas at cavity axial two ends entrance and exit, be arranged on the muffling unit in cavity, described housing comprises the end cap of cylindrical shell and outlet side, described outlet is arranged on end cap, and described muffling unit comprises one-level muffling unit and secondary muffling unit; Described secondary muffling unit is column or sheet and is made by pelelith, will surround the cavity that consists of by housing by the secondary muffling unit and be divided into inlet side cavity and outlet side cavity; Described one-level muffling unit is positioned at the inlet side cavity, comprises the inner tube that an end and entrance connection, the other end are connected with the secondary muffling unit; Permutation has the one-level hole on described inner pipe wall, is communicated with by the one-level hole in the pipe of inner tube and outside pipe; Be provided with air-flow path on described secondary muffling unit, an end of described air-flow path with the inlet side cavity between inner tube and housing be connected, the other end is connected with the outlet side cavity.
Further, described secondary muffling unit is column, is provided with the duct on described secondary muffling unit, by in hole link inner tube pipe and air-flow path.
Further, described muffling unit comprises three grades of muffling units that are positioned at the outlet side cavity, and described three grades of muffling units are column or sheet and are made by pelelith; The end cap of described three grades of muffling units and outlet side is close to, and offers through hole on described three grades of muffling units, described through hole one end with between secondary muffling unit and three grades of muffling units the outlet side cavity be connected, the other end and outlet be communicated with.
Further, be provided with holddown spring between described secondary muffling unit and three grades of muffling units.
Further, the end cap of described cylindrical shell and outlet side detachably is fixedly connected with.
Further, described one-level muffling unit comprises intervalve, and described inner tube, intervalve, housing are set with successively, and described inner tube is positioned at the intervalve pipe; On described intervalve tube wall, permutation has second hole, by in the pipe of second hole connection intervalve and outside pipe; Inlet side cavity one end between described inner tube and intervalve seals through the secondary muffling unit through housings close, the other end; Described air-flow path is connected with the inlet side cavity between intervalve and housing.
Further, described one-level muffling unit comprises the packed layer that is made of the pelelith fragment, and described packed layer is arranged between inner tube and intervalve in the inlet side cavity.
Further, on the annular section that described secondary muffling unit is corresponding with packed layer, permutation has blind hole.
Further, the external diameter of described secondary muffling unit adapts with cylinder internal diameter, and described air-flow path is arranged on the axial hole on the secondary muffling unit or is arranged on groove on secondary muffling unit side face.
Further, described air-flow path adopts groove, and described groove comprises straight-line groove and the spiral chute that is interconnected, and the adjacent straight wire casing is communicated with through spiral chute.
The invention has the beneficial effects as follows: comprehensive expansion chamber is eliminated the noise, reducing pressure by regulating flow is eliminated the noise and sound absorption, can realize good acoustic attenuation performance.Simultaneously, volcanic rock has that hole is many, quality is light, intensity is high, insulation, heat insulation, sound-absorbing, fire prevention, acid resistant alkali, the advantage such as corrosion-resistant, pollution-free, "dead", and is therefore durable in use; Overall structure is simple, avoids adopting microperforated panel, and is easy to process, cost is low; And when acoustic attenuation performance descends due to long-term use, can clean by recoil easily and recover acoustic attenuation performance, easy to maintenance, so structural behaviour is good.The silencing apparatus cavity is only separated by the secondary muffling unit, is provided with air-flow path on it, and the inside and outside mean porosities of volcanic rock is in 40% left and right, so aerodynamic quality is better than existing silencing apparatus.
Because volcanic rock can not melted by the high-temp waste gas that internal-combustion engine is discharged; Simultaneously, porosity ratio is large, is difficult for by obstructions such as carbon deposit, greasy filth, and can easily removes carbon deposit, greasy filth by the method that recoil is cleaned, and therefore can be applicable to the exhausting silencer of internal-combustion engine; In addition, due to the good adsorption performance of volcanic rock, can effectively reduce the harmful components in I. C. engine exhaust.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the present invention;
Fig. 2 is the schematic top view of embodiment of the present invention secondary muffling unit;
Fig. 3 is the axial schematic diagram of embodiment of the present invention secondary muffling unit.
Embodiment
Impedance complex formula silencing apparatus of the present invention, comprise housing 10, by housing 10 surround the cavity that consists of, lay respectively at cavity axial two ends gas entrance 11 and export 12, be arranged on the muffling unit in cavity; Described housing 10 comprises the end cap 15 of cylindrical shell 11 and outlet side, and described outlet 12 is arranged on end cap 15; Described muffling unit comprises one-level muffling unit 20 and secondary muffling unit 30; Described secondary muffling unit 30 is column or sheet and is made by pelelith, will surround the cavity that consists of by housing 10 by secondary muffling unit 30 and be divided into inlet side cavity 14 and outlet side cavity 13; Described one-level muffling unit is positioned at inlet side cavity 14, comprises the inner tube 22 that an end and entrance 11 connections, the other end are connected with secondary muffling unit 30; Permutation has one-level hole 23 on described inner tube 22 tube walls, is communicated with by one-level hole 23 in the pipe of inner tubes 22 and outside pipe; Be provided with air-flow path on described secondary muffling unit 30, an end of described air-flow path with the inlet side cavity 14 between inner tube 22 and housing 10 be connected, the other end is connected with outlet side cavity 13.
According to the reducing pressure by regulating flow principle, when having the restricting orifice of certain circulation area, pressure is reduced when high pressure draught.When by multistage throttle orifice plate series connection, just can be the once large sudden change pressure drop of the sky gradual change pressure drop under being separated into repeatedly of running in of original high voltage direct.Exhaust sound power is directly proportional to the high power of Pressure Drop, so it is emptying that pressure jump is changed into the pressure gradual change, just can obtain soundproof effect.
During silencing apparatus work of the present invention, high-temp waste gas enters silencing apparatus through outlet pipe, due to stopping of secondary muffling unit 30, the inlet side cavity 14 that most of air-flow can only be entered between inner tube 22 and housing 10 by one-level hole 23, then the air-flow path through secondary muffling unit 30 enters outlet side cavity 13, so air-flow passes through respectively the two-stage throttling of one-level hole 23 and air-flow path; Simultaneously, by air-flow path, outlet side cavity 13 with export 12 and consist of the expansion chamber noise elimination structure.Secondly, because secondary muffling unit 30 is made by pelelith, and volcanic rock is a kind of porous material, the fraction air-flow enters outlet side cavity 13 through the hole of secondary muffling unit 30 self, by 30 pairs of effects through the air-flow of air-flow path and himself hole of secondary muffling unit, utilize sound-absorbing porous material to friction and the damping function of sound wave, acoustic energy to be converted into heat energy.
Therefore, the comprehensive expansion chamber of impedance complex formula silencing apparatus of the present invention is eliminated the noise, reducing pressure by regulating flow is eliminated the noise and sound absorption, can realize good acoustic attenuation performance.Simultaneously, volcanic rock has that hole is many, quality is light, intensity is high, insulation, heat insulation, sound-absorbing, fire prevention, acid resistant alkali, the advantage such as corrosion-resistant, pollution-free, "dead", and therefore impedance complex formula silencing apparatus of the present invention is durable in use; Overall structure is simple, avoids adopting microperforated panel, and is easy to process, cost is low; And when acoustic attenuation performance descends due to long-term use, can clean by recoil easily and recover acoustic attenuation performance, easy to maintenance, so structural behaviour is good.The silencing apparatus cavity is only separated by secondary muffling unit 30, is provided with air-flow path on it, and the inside and outside mean porosities of volcanic rock is in 40% left and right, so aerodynamic quality is better than existing silencing apparatus.
Because volcanic rock can not melted by the high-temp waste gas that internal-combustion engine is discharged; Simultaneously, porosity ratio is large, is difficult for by obstructions such as carbon deposit, greasy filth, and can easily removes carbon deposit, greasy filth by the method that recoil is cleaned, and therefore can be applicable to the exhausting silencer of internal-combustion engine; In addition, due to the good adsorption performance of volcanic rock, can effectively reduce the harmful components in I. C. engine exhaust.Example as shown in Figure 1, i.e. a kind of silencing apparatus of eliminating the noise for motor exhaust, its housing 10 comprises the conically shaped 16 of inlet side, entrance 11 is arranged on the vertex of a cone of conically shaped 16.
Inner tube 22 can be sealed by secondary muffling unit 30, and when secondary muffling unit 30 was column, acoustically effective was good, but gas permeability is poor; When secondary muffling unit 30 in the form of sheets the time, good permeability, but acoustically effective is relatively poor.Therefore further, described secondary muffling unit 30 is column, is provided with the duct on described secondary muffling unit 30, the interior and air-flow path by hole link inner tube 22 pipes.The air-flow passing hole channel enters secondary muffling unit 30 inside, can improve the acoustically effective of secondary muffling unit 30; Simultaneously, air-flow enters air-flow path through the duct, can reduce vapour lock, improves aerodynamic quality, makes up the poor problem of secondary muffling unit 30 gas permeabilities of column.
In order to improve acoustically effective, the muffling unit of being made by pelelith that is column or sheet more than one-level can be set after one-level muffling unit 20 also.As in example as shown in Figure 1, described muffling unit comprises three grades of muffling units 40 that are positioned at outlet side cavity 13, and described three grades of muffling units 40 are made in the form of sheets and by pelelith; Described three grades of muffling units 40 are close to the end cap 15 of outlet side, offer through hole 41 on described three grades of muffling units 40, described through hole 41 1 ends with between secondary muffling unit 30 and three grades of muffling units 40 outlet side cavity 13 be connected, the other end and outlet 12 be communicated with.Certain three grades of muffling units 40 also can adopt column, but are unfavorable for the raising of aerodynamic quality and structural behaviour.
Above-mentioned secondary muffling unit 30 and three grades of muffling units 40 can adopt bonding etc. being fixed on housing 10; But in order to improve structural behaviour, ease of assembly, best, be provided with holddown spring 50 between described secondary muffling unit 30 and three grades of muffling units 40, effect by holddown spring 50, secondary muffling unit 30 is spacing fixing by inner tube 22 and intervalve 21, and three grades of muffling units 40 are spacing fixing by end cap 15.In order to maintain easily, further, the end cap 15 of described cylindrical shell 11 and outlet side detachably is fixedly connected with, and detachably is fixedly connected with and can adopts bolt, clamping etc., in example as shown in Figure 1, the end cap 15 of cylindrical shell 11 and outlet side detachably is fixedly connected with through screw thread.
As shown in Figure 1, further, described one-level muffling unit comprises intervalve 21, and described inner tube 22, intervalve 21, housing 10 are set with successively, and described inner tube 22 is positioned at intervalve 21 pipes; On described intervalve 21 tube walls, permutation has second hole, by in the pipe of second hole connection intervalve 21 and outside pipe; Inlet side cavity 14 1 ends between described inner tube 22 and intervalve seal through secondary muffling unit 30 through housing 10 sealings, the other end; Described air-flow path is connected with the inlet side cavity 14 between intervalve 21 and housing 10.Therefore, air-flow passes through respectively three grades of throttlings of one-level hole 23, second hole and air-flow path, can further improve the effect that reducing pressure by regulating flow is eliminated the noise.
Further, as shown in Figure 1, described one-level muffling unit comprises the packed layer 24 that is made of the pelelith fragment, and described packed layer 24 is arranged between inner tube 22 and intervalve 21 in inlet side cavity 14.When air-flow during through the packed layer 24 between inner tube 22 and intervalve 21, air-flow can improve acoustically effective by self hole of the pelelith fragment that consists of packed layer 24 and the Clearance Flow between fragment when improving the reducing pressure by regulating flow soundproof effect.Packed layer 24 can adopt its volcanic rock that is provided with radial hole and axial bore on tubular and barrel to replace, but packed layer 24 realize that cost is lower; Especially coordinate aforesaid holddown spring 50.
Above-mentioned inner tube 22 and intervalve 21 can be fixed on housing 10 by support welding, but in order to maintain easily, in example as shown in Figure 1, be provided with the outward flange 35 between inward flange 36, insertion intervalve 21 and the cylindrical shell 11 that inserts in inner tube 22 pipes on described secondary muffling unit 30.Inner tube 22 and intervalve 21 1 ends are weldingly fixed on housing 10, the other end supports by inward flange 36 and outward flange 35 respectively; Simultaneously, under holddown spring 50 effects, by inward flange 36 and outward flange 35, can guarantee the compression of 30 pairs of packed layers 24 of secondary muffling unit, guarantee that simultaneously secondary muffling unit 30 is with the cooperation of inner tube 22, intervalve 21.
In order further to improve the gas permeability of secondary muffling unit 30, improve the acoustically effective of secondary muffling unit 30, on described secondary muffling unit 30 annular section corresponding with packed layer 24, permutation has blind hole 39.
Above-mentioned air-flow path can adopt various structures, as: as described in secondary muffling unit 30 external diameters less than cylindrical shell 11 internal diameters, consist of air-flow path by the radial clearance between secondary muffling unit 30 and cylindrical shell 11; Perhaps the external diameter of described secondary muffling unit 30 adapts with cylindrical shell 11 internal diameters, and described air-flow path is arranged on the axial hole on secondary muffling unit 30 or is arranged on groove on secondary muffling unit 30 side faces.In example as shown in Figure 1, owing to adopting packed layer 24 between inner tube 22 and intervalve 21, therefore the throughput on intervalve 21 each circumferential positions is also inconsistent, therefore as shown in Figure 2 and Figure 3, described air-flow path adopts groove, and described groove comprises straight-line groove 38 and the spiral chute 37 that is interconnected, and adjacent straight wire casing 38 is communicated with through spiral chute 37, the straight-line groove 38 that is interconnected and spiral chute 37 are conducive to the even distribution of air-flow; Simultaneously, adopt straight-line groove 38 and spiral chute 37, be conducive to utilize interfere and eliminate the noise.
further, in example as shown in Figure 1, the duct comprises axial bore 31, the first radial hole 32, the second radial hole 34, axial groove 33, be communicated with in axial bore 31 1 ends and inner tube 22 pipes, the other end is communicated with the first radial hole 32, the first radial hole 32 coaxial grooves 33 of the other end are communicated with, the second radial hole 34 1 coaxial grooves 33 of end are communicated with, the other end sealing, the duct is communicated with air-flow path through axial groove 33, by axial bore 31, the first radial hole 32, the second radial hole 34 and axial groove 33 consist of mazy type resistance noise reduction structure, can further improve soundproof effect.
Impedance complex formula silencing apparatus of the present invention, concrete size can design according to actual conditions needs such as noise elimination frequency band, throughputs.Example as shown in Figure 1, boundary dimension is with reference to existing noise eliminator of motorcycle, the long 500mm of cylindrical shell 11, inner tube 22 and the long 450mm of outer tube 21, the long 100mm of conically shaped 16, the long 100mm of secondary muffling unit 30, cylindrical shell 11 internal diameter 100mm; Inner tube 22 internal diameter 30mm arrange three row one-level holes 23 on inner tube 22 tube walls, the internal diameter in one-level hole 23 is that 6mm, hole pitch are 35mm; Intervalve 21 internal diameters 90 arrange four row's second holes on intervalve 21 tube walls, the internal diameter of second hole is that 6mm, hole pitch are 55mm; Packed layer 24 fragment particle diameter 10mm, through the engineering experiment actual measurement, the soundproof effect of this silencing apparatus is suitable with existing noise eliminator of motorcycle, but fuel-economizing 15%～20%, and the harmful components in tail gas effectively reduce.
Claims (8)
1. impedance complex formula silencing apparatus, the cavity that comprises housing (10), surround to be consisted of by housing (10), lay respectively at the gas at cavity axial two ends entrance (11) and outlet (12), be arranged on the interior muffling unit of cavity, described housing (10) comprises the end cap (15) of cylindrical shell (11) and outlet side, described outlet (12) is arranged on end cap (15), and described muffling unit comprises one-level muffling unit (20) and secondary muffling unit (30); It is characterized in that:
Described secondary muffling unit (30) is column or sheet and is made by pelelith, will surround the cavity that consists of by housing (10) by secondary muffling unit (30) and be divided into inlet side cavity (14) and outlet side cavity (13); Described one-level muffling unit is positioned at inlet side cavity (14), comprises the inner tube (22) that an end and entrance (11) connection, the other end are connected with secondary muffling unit (30);
Permutation has one-level hole (23) on described inner tube (22) tube wall, by in the pipe of one-level hole (23) connection inner tube (22) and outside pipe; Be provided with air-flow path on described secondary muffling unit (30), a same inner tube of end (22) and the inlet side cavity (14) between housing (10) of described air-flow path is connected, the other end is connected with outlet side cavity (13);
Described muffling unit comprises the three grades of muffling units (40) that are positioned at outlet side cavity (13), and described three grades of muffling units (40) are column or sheet and are made by pelelith; Described three grades of muffling units (40) are close to the end cap (15) of outlet side, offer through hole (41) on described three grades of muffling units (40), described through hole (41) one ends with between secondary muffling unit (30) and three grades of muffling units (40) outlet side cavity (13) be connected, the other end and outlet (12) be communicated with;
Be provided with holddown spring (50) between described secondary muffling unit (30) and three grades of muffling units (40).
2. impedance complex formula silencing apparatus as claimed in claim 1, it is characterized in that: described secondary muffling unit (30) is column, is provided with the duct on described secondary muffling unit (30), by in hole link inner tube (22) pipe and air-flow path.
3. impedance complex formula silencing apparatus as claimed in claim 1, it is characterized in that: the end cap (15) of described cylindrical shell (11) and outlet side detachably is fixedly connected with.
4. as claim 1,2 or 3 described impedance complex formula silencing apparatuss, it is characterized in that:
Described one-level muffling unit comprises intervalve (21), and described inner tube (22), intervalve (21), housing (10) are set with successively, and described inner tube (22) is positioned at intervalve (21) pipe;
On described intervalve (21) tube wall, permutation has second hole, by in the pipe of second hole connection intervalve (21) and outside pipe;
Inlet side cavity (14) one ends between described inner tube (22) and intervalve seal through secondary muffling unit (30) through housing (10) sealing, the other end; Inlet side cavity (14) between the same intervalve of described air-flow path (21) and housing (10) is connected.
5. impedance complex formula silencing apparatus as claimed in claim 4, it is characterized in that: described one-level muffling unit comprises the packed layer (24) that is made of the pelelith fragment, and described packed layer (24) is arranged between inner tube (22) and intervalve (21) in inlet side cavity (14).
6. impedance complex formula silencing apparatus as claimed in claim 5 is characterized in that: on described secondary muffling unit (30) annular section corresponding with packed layer (24), permutation has blind hole (39).
7. impedance complex formula silencing apparatus as claimed in claim 5, it is characterized in that: the same cylindrical shell of external diameter (11) internal diameter of described secondary muffling unit (30) adapts, and described air-flow path is arranged on the axial hole on secondary muffling unit (30) or is arranged on groove on secondary muffling unit (30) side face.
8. impedance complex formula silencing apparatus as claimed in claim 7 is characterized in that: described air-flow path adopts groove, and described groove comprises straight-line groove (38) and the spiral chute (37) that is interconnected, and adjacent straight wire casing (38) is communicated with through spiral chute (37).
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| CN 201210109752 CN102606269B (en) | 2012-04-16 | 2012-04-16 | Impedance composite muffler |
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| CN 201210109752 CN102606269B (en) | 2012-04-16 | 2012-04-16 | Impedance composite muffler |
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| CN102606269B true CN102606269B (en) | 2013-11-06 |
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| CN103183120B (en) * | 2013-03-14 | 2017-02-22 | 昆明理工大学 | Volcanic rock noise elimination tile |
| CN108836630B (en) * | 2018-06-28 | 2020-07-14 | 广东工业大学 | Noise-proof earplug with silencing structure |
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| CN111828130A (en) * | 2020-06-18 | 2020-10-27 | 威迩徕德电力设备(上海)有限公司 | Diesel engine tail gas silencer |
| CN111894717A (en) * | 2020-06-28 | 2020-11-06 | 东南大学 | Exhaust mechanism of CBR600 in-line four-cylinder engine suitable for FSC (diesel fuel cycle) events |
| CN113833698A (en) * | 2021-09-23 | 2021-12-24 | 天长市天粮米业有限公司 | Fan noise reduction device of rice processing equipment |
| CN114108856B (en) * | 2021-11-25 | 2023-08-01 | 南京光声超构材料研究院有限公司 | Fractal sound-absorbing super-surface unit structure and fractal sound-absorbing super-surface |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5025890A (en) * | 1989-02-23 | 1991-06-25 | Mazda Motor Corporation | Engine exhaust apparatus |
| US6158214A (en) * | 1996-03-21 | 2000-12-12 | Microcompact Car Smart Gmbh | Exhaust silencer arrangement |
| DE19926480A1 (en) * | 1999-06-10 | 2000-12-28 | Paul Stoerk Kuefers Fa | Noise-reducing filter for pneumatic waste water pumping station satisfactory day and night |
| CN2471936Y (en) * | 2001-03-23 | 2002-01-16 | 马学亮 | Purified silencer for exhaust gas of diesel engine |
| CN2646392Y (en) * | 2003-08-27 | 2004-10-06 | 洛阳西苑车辆与动力检验所有限公司 | Tri-chamber impedance composite type exhaust muffler of engine |
| CN201943779U (en) * | 2011-03-24 | 2011-08-24 | 宜兴市川泽环境工程有限公司 | Impedance compound silencer |
| CN202578842U (en) * | 2012-04-16 | 2012-12-05 | 陈尔斌 | Dissipation and resistance compound type muffler |
-
2012
- 2012-04-16 CN CN 201210109752 patent/CN102606269B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5025890A (en) * | 1989-02-23 | 1991-06-25 | Mazda Motor Corporation | Engine exhaust apparatus |
| US6158214A (en) * | 1996-03-21 | 2000-12-12 | Microcompact Car Smart Gmbh | Exhaust silencer arrangement |
| DE19926480A1 (en) * | 1999-06-10 | 2000-12-28 | Paul Stoerk Kuefers Fa | Noise-reducing filter for pneumatic waste water pumping station satisfactory day and night |
| CN2471936Y (en) * | 2001-03-23 | 2002-01-16 | 马学亮 | Purified silencer for exhaust gas of diesel engine |
| CN2646392Y (en) * | 2003-08-27 | 2004-10-06 | 洛阳西苑车辆与动力检验所有限公司 | Tri-chamber impedance composite type exhaust muffler of engine |
| CN201943779U (en) * | 2011-03-24 | 2011-08-24 | 宜兴市川泽环境工程有限公司 | Impedance compound silencer |
| CN202578842U (en) * | 2012-04-16 | 2012-12-05 | 陈尔斌 | Dissipation and resistance compound type muffler |
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| CN102606269A (en) | 2012-07-25 |
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