CN104500178B - A kind of complex muffler preventing and treating diesel generating set low-frequency noise - Google Patents
A kind of complex muffler preventing and treating diesel generating set low-frequency noise Download PDFInfo
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- CN104500178B CN104500178B CN201310609792.8A CN201310609792A CN104500178B CN 104500178 B CN104500178 B CN 104500178B CN 201310609792 A CN201310609792 A CN 201310609792A CN 104500178 B CN104500178 B CN 104500178B
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Abstract
The invention provides a kind of complex muffler preventing and treating diesel generating set low-frequency noise, it is made up of resonance acoustical absorption structure, expansion chamber, resistance noise reduction structure, its resonance acoustical absorption structure, can preferably reduce the noise that diesel generating set sends, solve the always insoluble noise reduction problem of diesel generating set, especially reduce the low-frequency noise that diesel generating set sends.
Description
Technical field
The present invention relates to muffler for diesel generator set field, refer in particular to a kind of preventing and treating diesel generating set low-frequency noise
Complex muffler.
Background technology
Dissipative muffler is the sound absorption utilizing deadener or sound absorption structure, makes the noise along pipe transmmision with distance
And decay, thus reach noise elimination purpose.This kind of silencer has a good soundproof effect to high-frequency noise, and low frequency acoustic attenuation performance
Poor.
Reactive muffler is by mean of the expansion suddenly (or contraction) of pipeline section or side connects resonant cavity, makes along pipe transmmision
The sound wave of some frequency reflect back to Sounnd source direction at sudden change, thus reach noise elimination purpose.It is relatively specific for eliminating
Low Medium Frequency noise, and the noise elimination effect to high-frequency noise is poor.
Impedance composite muffler is that the noise-cancelling theory by dissipative muffler and reactive muffler is combined by appropriate configuration
Form, have both acoustic characteristicses concurrently.Sound-absorbing material commonly used by dissipative muffler glass fiber, mild steel silk screen, felt etc..
In addition owing to sound-absorbing material is easily melted by the high-temp waste gas that engine is discharged, therefore service life is short, and easily by carbon deposit, greasy filth
Reduce Deng blocking or lose noise elimination effect.
Glass fibre cotton presents preferable acoustically effective to high-frequency noise, but when low frequency its acoustic absorptivity 0.1 with
Under, it is impossible to play good sound absorption to low frequency, it is therefore desirable to improve the low frequency acoustic attenuation performance of complex muffler.
Use " the resonance acoustical absorption structure " that acoustic resonator is made, be a kind of high efficiency acoustic energy conversion equipment, have at the mouth of pipe
There is the sound absorbing power of the external sound wave close to the lowest resonance frequency of acoustic resonator for the quite powerful consumption, especially in low frequency altogether
The absorption area of ring device than the area of acoustic resonator, the particularly area of short tube mouth, many times greater.
Content of the invention
The invention discloses a kind of complex muffler preventing and treating diesel generating set low-frequency noise, this silencer noise reduction
Greatly, insertion loss is big.The present invention adopts the following technical scheme that a kind of combined type preventing and treating diesel generating set low-frequency noise is eliminated the noise
Device, is made up of resonance acoustical absorption structure, expansion chamber, resistance noise reduction structure, and its resonance acoustical absorption structure can preferably reduce diesel oil
The noise that generating set sends, solves the always insoluble noise reduction problem of diesel generating set, especially reduce diesel oil
The low-frequency noise that generating set sends.
The silencer first order uses many group resonance acoustical absorption structures to manufacture and forms, and the second level uses the two-stage resistance of expansion chamber
Noise elimination structure, the third level uses resistance noise reduction structure.Resonance acoustical absorption structure is made up of six resonators with elongation bottleneck
Broad band low frequency resonance sound-absorbing structure, is equivalent to the low frequency acoustic resonator arranging in muffler tail pipe, consumes close to acoustic resonator
The silencer exhaust sound wave of lowest resonance frequency.
The caliber of the resonator of multiple elongation bottlenecks immobilizes with cavity radius, and pipe range has different length in proportion respectively
Degree, two-by-two one group in opposite directions arranged become the resonance acoustical absorption structure perpendicular with discharge duct.
Expansion chamber arranges the resistance structure of two Stage interpolation tubular type, and expansion chamber is divided into three chambers by two dividing plates, front
On dividing plate and rear bulkhead, each own three sections of interpolation pipes are fixed on dividing plate, the punching of interpolation pipe one end, and bore dia is 2mm, hole total
Area is equal to this interpolation pipe sectional area, the port closure of punching end.
The discharge duct perforated plate of resistance noise reduction structure is fabricated to tubulose, at its folder being formed with suppressor case inwall
Rotating fields is filled by stone rock wool.
The resonance acoustical absorption structure of the present invention uses acoustic resonator to absorb the silencer exhaust sound close with its lowest resonance frequency
Ripple, reduces the low-frequency noise that diesel generating set sends, and preferably resolves diesel generating set noise reduction problem.
Brief description:
Fig. 1 is the front view of the present invention
Fig. 2 is the top view of the present invention
Reference numeral illustrates:
1-resonance acoustical absorption structure, 2-expansion chamber, 3-resistance noise reduction structure, 4-resonator, 5-interpolation pipe, 6-dividing plate 7-
Discharge duct, 8-stone rock wool.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the present invention is further described:
Such as Fig. 1, a kind of complex muffler preventing and treating diesel generating set low-frequency noise, the 1st, expanded by resonance acoustical absorption structure
Chamber the 2nd, resistance noise reduction structure 3 forms.The low frequency range that resonance acoustical absorption structure 1 is made up of six resonators 4 with elongation bottleneck
Band resonance sound-absorbing structure, is equivalent to the low frequency acoustic resonator arranging in muffler tail pipe, consumes minimum common close to acoustic resonator
The silencer exhaust sound wave of vibration frequency.The caliber of resonators of multiple elongation bottlenecks immobilizes with cavity radius, pipe range press than
Example has different length respectively, two-by-two one group in opposite directions arranged become the resonance acoustical absorption structure perpendicular with discharge duct.This
The caliber of the resonator that bright example uses and cavity radius are respectively 2.00 cm, 7.62 cm, the resonator of six elongation bottlenecks
Caliber immobilize with cavity radius, pipe range is respectively 15cm, 12.5cm, 10cm, 7.5cm, 5cm, 2.5cm, and pipe range ratio is
6:5:4:3:2:1, is divided into the resonance acoustical absorption structure that three groups of arranged become perpendicular with discharge duct.
Expansion chamber 2 arranges the resistance structure of two Stage interpolation pipe 5 formula, and expansion chamber is divided into three chambers by two dividing plates 6,
On front dividing plate and rear bulkhead, each own three sections of interpolation pipes are fixed on dividing plate, and the punching of interpolation pipe one end, bore dia is 2mm, hole
The gross area is equal to this interpolation pipe sectional area, the port closure of punching end.
The discharge duct 7 of resistance noise reduction structure is fabricated to tubulose with perforated plate, is formed at itself and suppressor case inwall
Sandwich stone rock wool 8 is filled.
Using the complex muffler of present example, insertion loss IL is 35dB (A).
Claims (3)
1. prevent and treat a complex muffler for diesel generating set low-frequency noise, by resonance acoustical absorption structure, expansion chamber, resistive
Noise elimination structure forms, it is characterised in that:
The broad band low frequency resonance sound-absorbing structure that described resonance acoustical absorption structure is made up of multiple resonators with elongation bottleneck, phase
When in the low frequency acoustic resonator arranging in muffler tail pipe, consume the silencer exhaust of the lowest resonance frequency close to acoustic resonator
Sound wave；
Described resonance acoustical absorption structure, the caliber of the resonator of its multiple elongation bottlenecks immobilizes with cavity radius, and pipe range is pressed
Ratio has different length respectively, two-by-two one group in opposite directions arranged become the resonance acoustical absorption structure perpendicular with discharge duct.
2. a kind of complex muffler preventing and treating diesel generating set low-frequency noise according to claim 1, expansion therein
Open chamber, it is characterised in that: arranging the resistance structure of two Stage interpolation tubular type, expansion chamber is divided into three chambers by two dividing plates,
On front dividing plate and rear bulkhead, each own three sections of interpolation pipes are fixed on dividing plate, and the punching of interpolation pipe one end, bore dia is 2mm, hole
The gross area is equal to this interpolation pipe sectional area, the port closure of punching end.
3. a kind of complex muffler preventing and treating diesel generating set low-frequency noise according to claim 1, resistance therein
Property noise elimination structure, it is characterised in that: discharge duct perforated plate is fabricated to tubulose, at its folder being formed with suppressor case inwall
Rotating fields is filled by stone rock wool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310609792.8A CN104500178B (en) | 2013-11-27 | 2013-11-27 | A kind of complex muffler preventing and treating diesel generating set low-frequency noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310609792.8A CN104500178B (en) | 2013-11-27 | 2013-11-27 | A kind of complex muffler preventing and treating diesel generating set low-frequency noise |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104500178A CN104500178A (en) | 2015-04-08 |
| CN104500178B true CN104500178B (en) | 2016-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310609792.8A Active CN104500178B (en) | 2013-11-27 | 2013-11-27 | A kind of complex muffler preventing and treating diesel generating set low-frequency noise |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401697B (en) * | 2016-11-07 | 2019-06-04 | 沈阳航天新光集团有限公司 | A kind of diesel generating set composite muffler |
| CN107178673B (en) * | 2017-07-26 | 2022-11-08 | 安徽理工大学 | Method and device for silencing pipeline noise gas |
| CN107956751B (en) * | 2017-11-28 | 2023-10-31 | 江苏徐工国重实验室科技有限公司 | Silencing device and sweeping machine |
| CN109067071A (en) * | 2018-08-31 | 2018-12-21 | 江苏金丰机电有限公司 | A kind of low noise motor |
| CN112814762A (en) * | 2019-11-15 | 2021-05-18 | 长沙贝尔环保股份有限公司 | Full-band noise silencer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2343349Y (en) * | 1998-10-28 | 1999-10-13 | 李戈夫 | Straight type microporous silencing cavity |
| US6341663B1 (en) * | 1997-11-24 | 2002-01-29 | Filterwerk Mann & Hummel Gmbh | Silencer with a shunt resonator |
| CN202328554U (en) * | 2011-12-05 | 2012-07-11 | Tcl空调器(中山)有限公司 | Novel muffler |
| CN102575538A (en) * | 2009-10-16 | 2012-07-11 | Ti汽车工程中心（海德堡）有限公司 | Sound absorber for a pipe-shaped, cavity-forming body |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3258517B2 (en) * | 1995-02-28 | 2002-02-18 | 株式会社テネックス | Manufacturing method of composite resonator |
| JP2006144557A (en) * | 2004-11-16 | 2006-06-08 | Mitsubishi Heavy Ind Ltd | Pipe and its manufacturing method |
-
2013
- 2013-11-27 CN CN201310609792.8A patent/CN104500178B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6341663B1 (en) * | 1997-11-24 | 2002-01-29 | Filterwerk Mann & Hummel Gmbh | Silencer with a shunt resonator |
| CN2343349Y (en) * | 1998-10-28 | 1999-10-13 | 李戈夫 | Straight type microporous silencing cavity |
| CN102575538A (en) * | 2009-10-16 | 2012-07-11 | Ti汽车工程中心（海德堡）有限公司 | Sound absorber for a pipe-shaped, cavity-forming body |
| CN202328554U (en) * | 2011-12-05 | 2012-07-11 | Tcl空调器(中山)有限公司 | Novel muffler |
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| CN104500178A (en) | 2015-04-08 |
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