CN104989494A - Multicavity resonance muffler - Google Patents
Multicavity resonance muffler Download PDFInfo
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- CN104989494A CN104989494A CN201510331393.9A CN201510331393A CN104989494A CN 104989494 A CN104989494 A CN 104989494A CN 201510331393 A CN201510331393 A CN 201510331393A CN 104989494 A CN104989494 A CN 104989494A
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- cavity
- barrel
- bloop
- air flow
- interlayer
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- Supercharger (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention provides a multicavity resonance muffler which solves the technical problem that a superchargerof the conventional supercharged engine produces high-frequency noise during low-speed instant acceleration. The multicavity resonance muffler is characterized in that a barrel is a conical barrel of which the diameter of an air flow outlet is less than that of an air flow inlet; a circular table-shaped inner cavity is formed in the barrel; a barrel wall is ofa two-layer structure with a cavity interlayer spaced; a plurality of annular radial partition plates are arranged in the interlayer; the cavity interlayer is divided into a plurality of annular cavities distributed along the axial direction by the radial partition plates; and strip-type muffle holes of different widths are formed in an inner layer barrel wall, and are formed in a staggered manner along the circumferential direction of the inner layer barrel wall. Mutual interferencecaused by the resonance of the strip-type muffle holes of the various resonant cavities are avoided; in addition, the resonant cavity volumes of various sections ofresonant and mufflingcavitiesare changed with the design of the outer wall of the conical barrel; the specific noise elimination bandwidth of each resonant cavity is regulated effectively; the noise reduction effect of the overall structure is improved; and the NVH (Noise Vibration and Harshness) of a finished automobile is improved effectively.
Description
Technical field
The present invention relates to internal combustion engine noise elimination denoising structure, especially for the multi-cavity resonance exhaust silencer of vehicle engine booster.
Background technique
At present, popularizing with family-sized car, Consumer no longer only rests in the reliability and durability level of excellent performance to family-sized car, car load NVH(noise, vibration and sound vibration roughness are abridged) on the design check requirements that requires to have risen to each depot, motor is as the power core of car load, except providing power for car load, also become the Main Noise Sources of car load.Wherein supercharged engine when the instantaneous acceleration of low speed because pressurized machine operation point produces high-frequency noise close to critical surge area, because its mechanism of production determines to avoid, so need eliminate from its noise transmission approach, existing motor silencer adopts tubular identical with outlet diameter size of air flow inlet substantially, this structure erasure effect is not good enough, can not reach higher erasure effect.
Summary of the invention
The object of this invention is to provide a kind of multi-cavity resonance exhaust silencer.Solve the technical problem producing high-frequency noise when existing supercharged engine baffler cannot be reduced in the instantaneous acceleration of low speed further, it effectively reduces by organizing resonant cavity the noise that engine supercharger produces when the instantaneous acceleration of low speed more, improves car load NVH.
The technical solution adopted in the present invention is: this multi-cavity resonance exhaust silencer comprises with flow outlet, the cylindrical shell of air flow inlet and venting cavity, its technological points is: cylindrical shell is the conically shaped that flow outlet diameter is less than air flow inlet diameter, frustoconic shape venting cavity is formed in cylindrical shell, barrel is the double layer construction that there is cavity interlayer at interval, the angle of barrel double-deck internal layer barrel and axis is less than the angle of outer barrel and axis, multiple annular radial dividing plate is provided with in interlayer, cavity interlayer is divided into multiple ring resonance of arranging vertically by this radial dividing plate, formed by close air flow inlet to the diminishing multiple resonant cavity of flow outlet volume, internal layer barrel is provided with multiple bar shaped bloop, bloop is along internal layer barrel circumference interlaced arrangement.
Described each resonant cavity is to having one group at the bloop of same radial cross section, and the opening area often organizing bloop to be directly proportional change with the size of the resonant cavity volume of correspondence.
The width of described bloop is reduced to flow outlet direction gradually by air flow inlet.
The advantage that the present invention has and good effect are: because the present invention adopts in cylindrical shell the conical shell forming frustoconic shape venting cavity, change and limit Acoustic Wave Propagation direction, effectively slow down the Propagation of Energy of sound wave in venting cavity; Barrel be provided with by near air flow inlet to the diminishing multiple resonant cavity of flow outlet volume, by reducing the resonant cavity of volume gradually, can stop and the noise of multi-frequency is weakened step by step, play effective stop; Many bar shapeds bloop of interlaced arrangement is provided with at internal layer barrel, avoid each resonant cavity bar shaped bloop resonance interference mutually, the each joint resonant cavity of effective adjustment is for stress release treatment frequency range, therefore, this structure significantly improves the noise overall structure noise reduction that baffler produces when the instantaneous acceleration of low speed engine supercharger, effectively improves car load NVH.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is perspective view of the present invention;
Fig. 2 is sectional view of the present invention.
In figure, sequence number illustrates: 1 flow outlet, 2 cylindrical shells, 3 air flow inlets, 4 internal layer barrels, 5 outer barrels, 6 radial dividing plates, 7 resonant cavities, 8 bloops, 9 venting cavities.
Embodiment
In order to make easy to understand of the present invention, concrete structure of the present invention is described in detail according to Fig. 1 and Fig. 2, embodiment: as illustrated in fig. 1 and 2, a kind of multi-cavity resonance exhaust silencer, comprise cylindrical shell 2, cylindrical shell is with flow outlet 1, air flow inlet 3 and venting cavity 9, cylindrical shell is the conically shaped that flow outlet diameter is less than air flow inlet diameter, frustoconic shape venting cavity 9 is formed in cylindrical shell, overall axial slices is trapezoidal, barrel is the double layer construction with internal layer barrel 4 and outer barrel 5, between internal layer barrel and outer barrel, there is cavity interlayer at interval, barrel double-deck internal layer barrel 4 and the angle of axis are less than the angle of outer barrel 5 and axis, multiple annular radial dividing plate 6 is provided with in interlayer, cavity interlayer is divided into multiple ring resonance 7 of arranging vertically by radial dividing plate 6, formed by close air flow inlet to the diminishing multiple resonant cavity of flow outlet volume, internal layer barrel is provided with multiple bar shaped bloop 8, bloop is along internal layer barrel circumference interlaced arrangement.
As further improvement, each resonant cavity 7 is to having one group at the bloop 8 of same radial cross section, the opening area often organizing bloop to be directly proportional change with the size of the resonant cavity volume of correspondence, is namely greater than the area of the bloop near flow outlet near the area of the bloop of air flow inlet.As further improvement, the width of bloop is reduced to flow outlet direction gradually by air flow inlet.
This structure effectively reduces different frequency range noise, what it adopted is Helmholtz resonator principle, bar shaped bloop is as a kind of improvement design making method of resonator vent, because single-cavity resonance structure stress release treatment frequency range is narrower, therefore by increasing the noise elimination frequency range improving silencing apparatus for the resonant cavity of different noise frequency range, resonate for avoiding each resonant cavity bar shaped bloop and mutually disturb, each bar shaped bloop of interlaced arrangement.
Claims (3)
1. a multi-cavity resonance exhaust silencer, it comprises with flow outlet, the cylindrical shell of air flow inlet and venting cavity, it is characterized in that: cylindrical shell is the conically shaped that flow outlet diameter is less than air flow inlet diameter, frustoconic shape venting cavity is formed in cylindrical shell, barrel is the double layer construction that there is cavity interlayer at interval, the angle of barrel double-deck internal layer barrel and axis is less than the angle of outer barrel and axis, multiple annular radial dividing plate is provided with in interlayer, cavity interlayer is divided into multiple ring resonance of arranging vertically by this radial dividing plate, formed by close air flow inlet to the diminishing multiple resonant cavity of flow outlet volume, internal layer barrel is provided with multiple bar shaped bloop, bloop is along internal layer barrel circumference interlaced arrangement.
2. multi-cavity resonance exhaust silencer according to claim 1, is characterized in that: described each resonant cavity is to having one group at the bloop of same radial cross section, and the opening area often organizing bloop to be directly proportional change with the size of the resonant cavity volume of correspondence.
3. multi-cavity resonance exhaust silencer according to claim 2, is characterized in that: the width of described bloop is reduced to flow outlet direction gradually by air flow inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510331393.9A CN104989494A (en) | 2015-06-16 | 2015-06-16 | Multicavity resonance muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510331393.9A CN104989494A (en) | 2015-06-16 | 2015-06-16 | Multicavity resonance muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104989494A true CN104989494A (en) | 2015-10-21 |
Family
ID=54301362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510331393.9A Pending CN104989494A (en) | 2015-06-16 | 2015-06-16 | Multicavity resonance muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104989494A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106288300A (en) * | 2016-09-08 | 2017-01-04 | 合肥美的暖通设备有限公司 | A kind of silencing means |
| CN106481420A (en) * | 2016-05-09 | 2017-03-08 | 徐工集团工程机械有限公司 | Silencer, engine and engineering mechanical device |
| CN109441779A (en) * | 2018-12-11 | 2019-03-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Cylinder holder structure and compressor with it |
| CN110805999A (en) * | 2019-11-08 | 2020-02-18 | 珠海格力电器股份有限公司 | Air duct shell, air conditioner indoor unit and air conditioner |
| CN110861628A (en) * | 2019-11-29 | 2020-03-06 | 安徽江淮汽车集团股份有限公司 | Airflow silencer and unloading valve with same |
| CN115142999A (en) * | 2022-08-02 | 2022-10-04 | 哈尔滨工程大学 | Booster air inlet silencer with adjustable cavity space structure |
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| CN2056723U (en) * | 1989-07-10 | 1990-05-02 | 机械电子工业部第二○五研究所 | Silencer with chngeable diameter tube |
| DE29612322U1 (en) * | 1996-02-10 | 1996-10-17 | Nießing Stahlbau- Stahlschornsteinbau GmbH, 46325 Borken | Low frequency pipe silencer |
| CN2498342Y (en) * | 2001-06-07 | 2002-07-03 | 邵本琦 | Multi-pipe composite silencer |
| CN2773455Y (en) * | 2005-02-23 | 2006-04-19 | 中国船舶重工集团公司第七一一研究所 | Joint sealing impendant composite silencer |
| US8256569B1 (en) * | 2010-10-04 | 2012-09-04 | Huff Dennis L | Exhaust sound attenuation device and method of use |
| CN202832715U (en) * | 2012-08-11 | 2013-03-27 | 郭荣 | Broadband muffler |
| CN204283685U (en) * | 2014-12-11 | 2015-04-22 | 安徽江淮汽车股份有限公司 | A kind of silencing apparatus composition |
| CN204827604U (en) * | 2015-06-16 | 2015-12-02 | 华晨汽车集团控股有限公司 | Multicavity resonant silencer |
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2015
- 2015-06-16 CN CN201510331393.9A patent/CN104989494A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2056723U (en) * | 1989-07-10 | 1990-05-02 | 机械电子工业部第二○五研究所 | Silencer with chngeable diameter tube |
| DE29612322U1 (en) * | 1996-02-10 | 1996-10-17 | Nießing Stahlbau- Stahlschornsteinbau GmbH, 46325 Borken | Low frequency pipe silencer |
| CN2498342Y (en) * | 2001-06-07 | 2002-07-03 | 邵本琦 | Multi-pipe composite silencer |
| CN2773455Y (en) * | 2005-02-23 | 2006-04-19 | 中国船舶重工集团公司第七一一研究所 | Joint sealing impendant composite silencer |
| US8256569B1 (en) * | 2010-10-04 | 2012-09-04 | Huff Dennis L | Exhaust sound attenuation device and method of use |
| CN202832715U (en) * | 2012-08-11 | 2013-03-27 | 郭荣 | Broadband muffler |
| CN204283685U (en) * | 2014-12-11 | 2015-04-22 | 安徽江淮汽车股份有限公司 | A kind of silencing apparatus composition |
| CN204827604U (en) * | 2015-06-16 | 2015-12-02 | 华晨汽车集团控股有限公司 | Multicavity resonant silencer |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481420A (en) * | 2016-05-09 | 2017-03-08 | 徐工集团工程机械有限公司 | Silencer, engine and engineering mechanical device |
| CN106481420B (en) * | 2016-05-09 | 2019-08-23 | 徐工集团工程机械有限公司 | Silencer, engine and engineering mechanical device |
| CN106288300A (en) * | 2016-09-08 | 2017-01-04 | 合肥美的暖通设备有限公司 | A kind of silencing means |
| CN106288300B (en) * | 2016-09-08 | 2019-01-11 | 合肥美的暖通设备有限公司 | A kind of silencing means |
| CN109441779A (en) * | 2018-12-11 | 2019-03-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Cylinder holder structure and compressor with it |
| CN110805999A (en) * | 2019-11-08 | 2020-02-18 | 珠海格力电器股份有限公司 | Air duct shell, air conditioner indoor unit and air conditioner |
| CN110861628A (en) * | 2019-11-29 | 2020-03-06 | 安徽江淮汽车集团股份有限公司 | Airflow silencer and unloading valve with same |
| CN115142999A (en) * | 2022-08-02 | 2022-10-04 | 哈尔滨工程大学 | Booster air inlet silencer with adjustable cavity space structure |
| US20240044306A1 (en) * | 2022-08-02 | 2024-02-08 | Harbin Engineering University | Turbocharger air intake silencer with adjustable cavity space structure |
| US11905916B1 (en) * | 2022-08-02 | 2024-02-20 | Harbin Engineering University | Turbocharger air intake silencer with adjustable cavity space structure |
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Application publication date: 20151021 |
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