CN104500178A - Complex muffler for reducing low-frequency noise of diesel generator set - Google Patents
Complex muffler for reducing low-frequency noise of diesel generator set Download PDFInfo
- Publication number
- CN104500178A CN104500178A CN201310609792.8A CN201310609792A CN104500178A CN 104500178 A CN104500178 A CN 104500178A CN 201310609792 A CN201310609792 A CN 201310609792A CN 104500178 A CN104500178 A CN 104500178A
- Authority
- CN
- China
- Prior art keywords
- muffler
- frequency
- frequency noise
- resonance
- generating set
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention provides a complex muffler for reducing low-frequency noise of a diesel generator set. The complex muffler comprises a resonant sound absorption structure, an expansion cavity and a resistance noise reduction structure, wherein the resonant sound absorption structure can better reduce the noise produced by the diesel generator set, solves the noise reduction problem, which is hard to solve, of the diesel generator set, and especially reduces the low-frequency noise produced by the diesel generator set.
Description
Technical field
The present invention relates to muffler for diesel generator set field, refer in particular to a kind of complex muffler preventing and treating diesel generating set low-frequency noise.
Background technique
Dissipative muffler is the sound absorption utilizing muffler material or sound absorption structure, the noise along pipe transmmision is decayed with distance, thus reaches noise elimination object.This kind of silencing apparatus has good soundproof effect to high-frequency noise, and low frequency acoustic attenuation performance is poor.
Reactive muffler connects resonant cavity by means of the unexpected expansion (or shrink) of pipeline section or side, the sound wave of some frequency along pipe transmmision reflected back to Sounnd source direction in sudden change place, thus reaches noise elimination object.It compares and is applicable to eliminate Low Medium Frequency noise, and poor to the noise elimination effect of high-frequency noise.
Impedance composite muffler is combined by appropriate configuration the noise-cancelling theory of dissipative muffler and reactive muffler, has both acoustic characteristicses concurrently.Sound-absorbing material commonly used by dissipative muffler glass fiber, low carbon steel silk screen, felt etc.The high-temp waste gas of in addition easily being discharged by motor due to sound-absorbing material melt, therefore working life is short, and is easily blocked by carbon deposit, greasy filth etc. and reduce or lose noise elimination effect.
Glass fibre cotton has good acoustically effective to high-frequency noise, but when low frequency, its acoustic absorptivity, below 0.1, can not play good sound absorption to low frequency, therefore needs the low frequency acoustic attenuation performance improving complex muffler.
Adopt " resonance acoustical absorption structure " that acoustic resonator is made, it is a kind of high efficiency acoustic energy conversion equipment, there is at the mouth of pipe place sound absorbing power of quite powerful consumption close to the external sound wave of the lowest resonance frequency of acoustic resonator, especially at the absorption area of low frequency acoustic resonator than the area of acoustic resonator, the particularly area of short tube mouth, much larger times.
Summary of the invention
The invention discloses a kind of complex muffler preventing and treating diesel generating set low-frequency noise, this silencing apparatus noise reduction is large, and insertion loss is large.The present invention adopts following technological scheme: a kind of complex muffler preventing and treating diesel generating set low-frequency noise, be made up of resonance acoustical absorption structure, expansion chamber, resistance noise reduction structure, its resonance acoustical absorption structure, the noise that diesel generating set sends can be reduced preferably, solve diesel generating set insoluble noise reduction problem always, especially reduce the low-frequency noise that diesel generating set sends.
The silencing apparatus first order adopts many group resonance acoustical absorption structures to manufacture and forms, and the second level adopts the two-stage reactive muffling structure of expansion chamber, and the third level adopts resistance noise reduction structure.The broad band low frequency resonance sound-absorbing structure that the resonator that resonance acoustical absorption structure extends bottleneck by six bands forms, is equivalent to the low frequency acoustic resonator arranged in muffler tail pipe, consumes the silencing apparatus exhaust sound wave close to the lowest resonance frequency of acoustic resonator.
Caliber and the cavity radius of the resonator of multiple elongation bottleneck immobilize, and pipe range has different length in proportion respectively, between two one group of resonance acoustical absorption structure that arranged becomes and exhaust duct is perpendicular in opposite directions.
Expansion chamber arranges 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, the punching of interpolation pipe one end, bore dia is 2mm, the gross area in hole equals this interpolation pipe sectional area, the port shutoff of punching end.
The exhaust duct perforated plate of resistance noise reduction structure is made into tubulose, and the sandwich structure stone rock wool formed at itself and suppressor case inwall is filled.
Resonance acoustical absorption structure of the present invention adopts acoustic resonator to absorb the silencing apparatus close with its lowest resonance frequency and is vented sound wave, reduces the low-frequency noise that diesel generating set sends, preferably resolves diesel generating set noise reduction problem.
accompanying drawing illustrates:
Fig. 1 is plan view of the present invention
Fig. 2 is plan 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-exhaust duct, 8-stone rock wool.
embodiment:
Below in conjunction with accompanying drawing, the present invention is further described:
As Fig. 1, a kind of complex muffler preventing and treating diesel generating set low-frequency noise, is made up of resonance acoustical absorption structure 1, expansion chamber 2, resistance noise reduction structure 3.The broad band low frequency resonance sound-absorbing structure that the resonator 4 that resonance acoustical absorption structure 1 extends bottleneck by six bands forms, is equivalent to the low frequency acoustic resonator arranged in muffler tail pipe, consumes the silencing apparatus exhaust sound wave close to the lowest resonance frequency of acoustic resonator.Caliber and the cavity radius of the resonator of multiple elongation bottleneck immobilize, and pipe range has different length in proportion respectively, between two one group of resonance acoustical absorption structure that arranged becomes and exhaust duct is perpendicular in opposite directions.The caliber of the resonator that example of the present invention adopts and cavity radius are respectively 2.00 cm, 7.62 cm, caliber and the cavity radius of the resonator of six elongation bottlenecks immobilize, and pipe range is respectively 15cm, 12.5cm, 10cm, 7.5cm, 5cm, 2.5cm, pipe range, than being 6:5:4:3:2:1, is divided into the resonance acoustical absorption structure that three groups of arranged become perpendicular with exhaust duct.
Expansion chamber 2 arranges the resistance structure of two Stage interpolation pipe 5 formula, 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, the punching of interpolation pipe one end, bore dia is 2mm, the gross area in hole equals this interpolation pipe sectional area, the port shutoff of punching end.
The exhaust duct 7 of resistance noise reduction structure is made into tubulose with perforated plate, and the sandwich structure stone rock wool 8 formed at itself and suppressor case inwall is filled.
Adopt the complex muffler of example of the present invention, insertion loss IL is 35dB (A).
Claims (4)
1. prevent and treat the complex muffler of diesel generating set low-frequency noise for one kind, be made up of resonance acoustical absorption structure, expansion chamber, resistance noise reduction structure, it is characterized in that: the broad band low frequency resonance sound-absorbing structure that the resonator that described resonance acoustical absorption structure extends bottleneck by multiple band forms, be equivalent to the low frequency acoustic resonator arranged in muffler tail pipe, consume the silencing apparatus exhaust sound wave close to the lowest resonance frequency of acoustic resonator.
2. a kind of complex muffler preventing and treating diesel generating set low-frequency noise according to claim 1, resonance acoustical absorption structure wherein, it is characterized in that: caliber and the cavity radius of the resonator of multiple elongation bottleneck immobilize, pipe range has different length in proportion respectively, between two one group of resonance acoustical absorption structure that arranged becomes and exhaust duct is perpendicular in opposite directions.
3. a kind of complex muffler preventing and treating diesel generating set low-frequency noise according to claim 1, expansion chamber wherein, it is characterized in that: the resistance structure that two Stage interpolation tubular type is set, 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, the punching of interpolation pipe one end, and bore dia is 2mm, the gross area in hole equals this interpolation pipe sectional area, the port shutoff of punching end.
4. a kind of complex muffler preventing and treating diesel generating set low-frequency noise according to claim 1, resistance noise reduction structure wherein, it is characterized in that: exhaust duct perforated plate is made into tubulose, the sandwich structure stone rock wool formed at itself and suppressor case inwall is filled.
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 true CN104500178A (en) | 2015-04-08 |
| CN104500178B CN104500178B (en) | 2016-11-09 |
Family
ID=52941617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104500178B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401697A (en) * | 2016-11-07 | 2017-02-15 | 沈阳航天新光集团有限公司 | Complex silencer for diesel generator unit |
| CN107178673A (en) * | 2017-07-26 | 2017-09-19 | 安徽理工大学 | The silencing means and method of a kind of duct noise gas |
| CN107956751A (en) * | 2017-11-28 | 2018-04-24 | 徐工集团工程机械有限公司 | Silencing apparatus 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 (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08240115A (en) * | 1995-02-28 | 1996-09-17 | Tsuchiya Mfg Co Ltd | Manufacture of compound resonator |
| CN2343349Y (en) * | 1998-10-28 | 1999-10-13 | 李戈夫 | Straight-type multi-porous silencing chamber |
| US6341663B1 (en) * | 1997-11-24 | 2002-01-29 | Filterwerk Mann & Hummel Gmbh | Silencer with a shunt resonator |
| JP2006144557A (en) * | 2004-11-16 | 2006-06-08 | Mitsubishi Heavy Ind Ltd | Pipe and its manufacturing method |
| 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 |
-
2013
- 2013-11-27 CN CN201310609792.8A patent/CN104500178B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08240115A (en) * | 1995-02-28 | 1996-09-17 | Tsuchiya Mfg Co Ltd | Manufacture of compound resonator |
| 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 multi-porous silencing chamber |
| JP2006144557A (en) * | 2004-11-16 | 2006-06-08 | Mitsubishi Heavy Ind Ltd | Pipe and its manufacturing method |
| 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 |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401697A (en) * | 2016-11-07 | 2017-02-15 | 沈阳航天新光集团有限公司 | Complex silencer for diesel generator unit |
| 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 |
| CN107178673A (en) * | 2017-07-26 | 2017-09-19 | 安徽理工大学 | The silencing means and method of a kind of duct noise gas |
| CN107178673B (en) * | 2017-07-26 | 2022-11-08 | 安徽理工大学 | Method and device for silencing pipeline noise gas |
| CN107956751A (en) * | 2017-11-28 | 2018-04-24 | 徐工集团工程机械有限公司 | Silencing apparatus and sweeping machine |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104500178B (en) | 2016-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104500178A (en) | Complex muffler for reducing low-frequency noise of diesel generator set | |
| CN202431336U (en) | Automotive exhaust silencer | |
| CN103075605B (en) | Double-cavity resonant type muffler | |
| CN104948265A (en) | Impedance compound muffler | |
| CN105134354A (en) | Mobile muffler | |
| CN105351037A (en) | Small-hole high-frequency noise eliminator | |
| CN103835794A (en) | Exhaust silencer for automobiles with output volume of 2.0L | |
| CN115116419A (en) | Acoustic superstructure silencer based on porous material and using method thereof | |
| CN205154305U (en) | Exhaust cooling silencing device | |
| CN204716362U (en) | Engineering machinery noise-reducing silencer | |
| CN201218126Y (en) | Engine exhaust wide-band silencer | |
| CN106907227A (en) | A kind of blast pipe sleeve pipe with damping and silencing effect | |
| CN106468199A (en) | Electromotor Pear-Shaped deafener | |
| CN206487543U (en) | A kind of diesel-driven generator exhaust silencer system | |
| CN206338099U (en) | A kind of wideband noise-reducing silencer | |
| CN212202181U (en) | Diesel generator exhaust amortization structure | |
| CN212155281U (en) | Noise elimination device for tunnel fan | |
| CN204436545U (en) | Light truck muffler for internal combustion engine | |
| CN106499465A (en) | It is based on aerodynamic noise reduction improved structure | |
| CN202811011U (en) | Main muffler with no sound-absorbing cotton | |
| CN206785449U (en) | A kind of automobile muffler | |
| CN203515745U (en) | SCR noise elimination cavity | |
| CN214897604U (en) | Internal side type resonance structure and silencer composed of same | |
| CN203570390U (en) | Integrated type SCR box sound attenuation unit | |
| CN206158820U (en) | Impedance combined silencer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |