CN104234890A - High-frequency muffler used on automobile intercooler intake pipe - Google Patents
High-frequency muffler used on automobile intercooler intake pipe Download PDFInfo
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- CN104234890A CN104234890A CN201310248931.9A CN201310248931A CN104234890A CN 104234890 A CN104234890 A CN 104234890A CN 201310248931 A CN201310248931 A CN 201310248931A CN 104234890 A CN104234890 A CN 104234890A
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- main pipeline
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Abstract
The invention discloses a high-frequency muffler used on an automobile intercooler intake pipe. The high-frequency muffler comprises a high-frequency muffling structure and a main pipeline connected on the intercooler intake pipe; a closed shell is positioned and connected on the periphery of the main pipeline, at least two partitions are arranged in the closed shell radially to enable at least two resonant cavities and an expansion cavity to be formed in the closed shell, each resonant cavity is communicated with the main pipeline through a group of small round through holes formed in the circumference of the main pipeline, the expansion cavity is directly communicated with the main pipeline, and the resonant cavities and the expansion cavities jointly form the high-frequency muffling structure. In a limited engine room space, the high-frequency muffler is wider in muffling frequency band, excellent in muffling performance and capable of more effectively lowering high-frequency noise such as squeal and surge generated in the working process of a turbocharger.
Description
Technical field
The invention belongs to the automobile noise control technical field, be specifically related to a kind of high frequency silencing apparatus in vehicle intercooler suction tude, with reduce produce in turbocharger operation process utter long and high-pitched sounds, the high-frequency noise such as surge.
Background technique
Along with the application of turbocharging technology in motor car engine, the high-frequency noises such as while raising vehicle dynamic quality, what turbosupercharger produced utters long and high-pitched sounds, surge are also more and more outstanding, and rise to the main contributions source of internal car noise gradually.This noise frequency mainly concentrates within the scope of 1200Hz ~ 2500Hz, and what have even reaches 3000Hz, and frequency is high and coverage area is extremely wide.How to reduce produce in turbocharger operation process utter long and high-pitched sounds, the high-frequency noise such as surge, the sound quality improving automobile seems particularly important.
At present, the mode solving high-frequency noise mainly contains two kinds: (1) adds multiple (usual four) quarter-wave long tube on air inlet tube of cooler, quarter-wave long tube is the pipe that one end perforate is closed in one end, itself and air inlet tube of cooler together form collateral branch's type silencing apparatus, quarter wavelength pipe has stronger frequency selectivity, only in the narrower frequency range centered by resonant frequency, play effective noise elimination effect, noise elimination effect is play hardly to other frequency, the acoustic characteristics of its uniqueness makes it obvious to the control effects of narrow band peak values noise, and to wide band peak noise control effects extreme difference, if more quarter-wave long tube in parallel on air inlet tube of cooler, then suitably can improve noise elimination frequency band (noise elimination bandwidth), but, in view of the requirement in Arrangement of Engine-room space, the number of quarter-wave long tube and position can be restricted, thus its acoustic attenuation performance are not met the demands and unsightly.(2) on air inlet tube of cooler, three resonant cavities (also can be more than three) are arranged side by side to form high frequency noise elimination structure 3(see Fig. 1), each resonant cavity is communicated with air inlet tube of cooler 1 by group radial little round tube hole 11 of on air inlet tube of cooler 1, the soundproof effect of high frequency noise elimination structure 3 is obviously better than quarter-wave long tube, and without passing through frequency, the quantity of its resonant cavity determines the quantity of noise elimination peak value, and the diameter of radial little round tube hole, the volume of quantity and resonant cavity determines the bandwidth of single noise elimination peak value jointly, the number of resonant cavity is more, the quantity of noise elimination peak value is also more, noise elimination bandwidth can be widened to a certain extent, if keep former resonant cavity number constant, when increasing axial length (namely chamber is long), optimizing quantity and the bore dia of little round tube hole, also can widen noise elimination bandwidth to a certain extent, but this high frequency noise elimination structure also can be subject to the restriction of Arrangement of Engine-room, its radial dimension and axial length can only within the scope of certain sizes, thus affect the chamber number of resonant cavity and the quantity of little round tube hole, make its noise elimination frequency band can not cover the frequency range of needs well, do not have good noise elimination effect.
Summary of the invention
The object of this invention is to provide a kind of high frequency silencing apparatus in vehicle intercooler suction tude, with in limited cabin space, make its noise elimination frequency band wider, acoustic attenuation performance is excellent, produce in more effective reduction turbocharger operation process utter long and high-pitched sounds, the high-frequency noise such as surge.
High frequency silencing apparatus in vehicle intercooler suction tude of the present invention, comprises high frequency noise elimination structure and is connected to the main pipeline on air inlet tube of cooler; Be located by connecting in the periphery of main pipeline an enclosing housing, at least two pieces of dividing plates are radially provided with in this enclosing housing, enclosing housing is made to form at least two resonant cavities and an expansion cavity, each resonant cavity is opened in main pipeline little round tube hole circumferentially by one group and is communicated with main pipeline, expansion cavity is directly communicated with main pipeline that (namely corresponding with expansion cavity on main pipeline circumferential section does not have wall, main pipeline and expansion cavity are directly through), resonant cavity and expansion cavity form described high frequency noise elimination structure jointly.
Further, the chamber of at least two described resonant cavities is long variant, when resonant cavity radial dimension identical and the quantity organizing little round tube hole for that connection and diameter are also identical, the long corresponding different noise elimination peak value in different chambeies, can make noise elimination frequency band wider.
Further, conveniently process and install, described enclosing housing is cylindrical shape, and described dividing plate is ring.
Further, in order to fixing high frequency silencing apparatus, prevent shake, the outside of described enclosing housing is provided with high frequency silencing apparatus fixed support, for high frequency silencing apparatus is fixed on vehicle body.
Preferably, described dividing plate has three pieces, and described high frequency noise elimination structure to be arranged in order along the airflow direction of main pipeline by first, second, third resonant cavity and expansion cavity and to form.
The cavity volume of each resonant cavity in the present invention, the quantity of little round tube hole and diameter are all carry out matched design according to the frequency spectrum of turbocharger noise, the chamber of expansion cavity is long then carrys out common matched design according to the frequency spectrum of turbocharger noise and the sound transmission loss curve of each resonant cavity, namely the sound transmission loss curve not only having structure of resonant cavity with expansion cavity is first calculated, sound deadening capacity under what frequency range is found out in conjunction with the frequency spectrum of turbocharger noise again and noise elimination bandwidth also needs to improve according to the sound transmission loss curve that calculates, the chamber that the last frequency range improved according to needs designs expansion cavity is long.
Its noise-cancelling theory is: come from the air whirl noise that turbosupercharger produces, the cross section of multiple acoustic impedance sudden changes that the resonant cavity first running into high frequency silencing apparatus is formed, there is multiple reflections, gas rubs back and forth between little round tube hole, consumed energy, then run into expansion cavity, acoustic reflection occurs and doubles consumed energy, thus the high-frequency noises such as effective reduction is uttered long and high-pitched sounds, surge.
The present invention adopts resonant cavity and expansion cavity jointly to form high frequency noise elimination structure, the frequency of noise elimination characteristic of resonant cavity and the frequency characteristic of turbocharger noise match, and have enough sound deadening capacities, expansion cavity broadens the noise elimination bandwidth of sound transmission loss, make its covering frequence former only have on the basis of resonant cavity be multiplied, noise elimination bandwidth and the sound deadening capacity of sound transmission loss has been increased exponentially compared with existing high frequency silencing apparatus, acoustic attenuation performance is excellent, more effectively reduce uttering long and high-pitched sounds of producing in turbocharger operation process, the high-frequency noises such as surge, improve the sound quality of automobile, resonant cavity and expansion cavity to be isolated by dividing plate by enclosing housing and are formed, and physical dimension is little, require that restriction is little, and moulding is neat and artistic by Arrangement of Engine-room.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing high frequency silencing apparatus in vehicle intercooler suction tude.(arrow represents airflow direction)
Fig. 2 is structural representation of the present invention.(arrow represents airflow direction)
Fig. 3 is the A-A sectional view of Fig. 2.
Fig. 4 is the ssembly drawing of the present invention and air inlet tube of cooler.
Fig. 5 is sound transmission loss plotted curve.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
embodiment 1:the high frequency silencing apparatus in vehicle intercooler suction tude as shown in Figure 2, Figure 3, Figure 4, the main pipeline 2 comprising high frequency noise elimination structure 3 and be connected on air inlet tube of cooler 1, air inlet tube of cooler 1 is divided into two sections, be threaded connection near one section of suction tude of turbosupercharger and one end of main pipeline 2, be threaded connection near one section of suction tude of intercooler and the other end of main pipeline 2, a columnar enclosing housing 4 is connected with in the periphery of main pipeline 2, the outside of this enclosing housing 4 is provided with high frequency silencing apparatus fixed support 6, the dividing plate 5 of three pieces of rings is radially provided with in this enclosing housing 4, enclosing housing 4 is made to form the first resonant cavity 32 successively along the airflow direction of main pipeline 2, second resonant cavity 33, 3rd resonant cavity 34 and expansion cavity 31, first resonant cavity 32, second resonant cavity 33 is long different with the chamber of the 3rd resonant cavity 34, three long corresponding three noise elimination peak values respectively in different chamber, first resonant cavity 32, second resonant cavity 33, 3rd resonant cavity 34 is all opened in main pipeline 2 little round tube hole 21 circumferentially by one group and is communicated with main pipeline 2, the quantity often organizing little round tube hole 21 is all identical with diameter, expansion cavity 31 is directly communicated with main pipeline 2, first resonant cavity 32, second resonant cavity 33, 3rd resonant cavity 34 and expansion cavity 31 form high frequency noise elimination structure 3 jointly.
First, second, the radial dimension of the 3rd resonant cavity, quantity and the diameter of little round tube hole are identical, but when chamber length is different, and at the radial dimension and first of expansion cavity, second, the radial dimension of the 3rd resonant cavity is identical, but when chamber length is shorter, through CAE acoustics simulation calculation, obtain sound transmission loss curve as shown in Figure 5, a in figure, b, c is correspondence first respectively, second, the noise elimination peak value of the 3rd resonant cavity, d is for after having added expansion cavity, first, second, noise elimination frequency band is broadened at double and the noise elimination peak value occurred under the acting in conjunction of the 3rd resonant cavity, take 20dB as sound deadening capacity, the noise elimination bandwidth of existing high frequency silencing apparatus (only having three resonant cavities) in vehicle intercooler suction tude is only the width between 900Hz(and e and f), and the noise elimination bandwidth of the present invention's (having three resonant cavities and an expansion cavity) is the width between 1700Hz(and e and g), all identical in other condition, after merely add the long shorter expansion cavity in chamber, but noise elimination frequency band (noise elimination bandwidth) is broadened at double, its sound transmission loss is obviously better than the sound transmission loss of existing high frequency silencing apparatus in vehicle intercooler suction tude, its extremely wide noise elimination bandwidth well covers the frequency of turbocharger noise, effectively reduce uttering long and high-pitched sounds of turbosupercharger, the high-frequency noises such as surge.
embodiment 2:it is identical with principle with the main structure of embodiment 1, and difference is: only establish two pieces of dividing plates 5 in enclosing housing 4, and high frequency noise elimination structure is made up of two resonant cavities and an expansion cavity.
embodiment 3:it is identical with principle with the main structure of embodiment 1, and difference is: establish four pieces of dividing plates 5 in enclosing housing 4, and high frequency noise elimination structure is made up of four resonant cavities and an expansion cavity.
Claims (5)
1. the high frequency silencing apparatus in vehicle intercooler suction tude, comprises high frequency noise elimination structure (3) and is connected to the main pipeline (2) on air inlet tube of cooler (1); It is characterized in that: be located by connecting in the periphery of main pipeline (2) enclosing housing (4), at least two pieces of dividing plates (5) are radially provided with in this enclosing housing, enclosing housing is made to form at least two resonant cavities and an expansion cavity (31), each resonant cavity is opened in main pipeline little round tube hole (21) circumferentially by one group and is communicated with main pipeline, expansion cavity (31) is directly communicated with main pipeline (2), and resonant cavity and expansion cavity (31) form described high frequency noise elimination structure (3) jointly.
2. the high frequency silencing apparatus in vehicle intercooler suction tude according to claim 1, is characterized in that: the chamber of at least two described resonant cavities is long variant.
3. the high frequency silencing apparatus in vehicle intercooler suction tude according to claim 2, it is characterized in that: described enclosing housing (4) is cylindrical shape, described dividing plate (5) is ring.
4. the high frequency silencing apparatus in vehicle intercooler suction tude according to claim 3, is characterized in that: the outside of described enclosing housing (4) is provided with high frequency silencing apparatus fixed support (6).
5. the high frequency silencing apparatus in vehicle intercooler suction tude according to claim 1 or 2 or 3 or 4, it is characterized in that: described dividing plate (5) has three pieces, described high frequency noise elimination structure (3) to be arranged in order along the airflow direction of main pipeline (2) by first, second, third resonant cavity (32,33,34) and expansion cavity (31) and to form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310248931.9A CN104234890A (en) | 2013-06-21 | 2013-06-21 | High-frequency muffler used on automobile intercooler intake pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310248931.9A CN104234890A (en) | 2013-06-21 | 2013-06-21 | High-frequency muffler used on automobile intercooler intake pipe |
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| CN104234890A true CN104234890A (en) | 2014-12-24 |
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| CN201310248931.9A Pending CN104234890A (en) | 2013-06-21 | 2013-06-21 | High-frequency muffler used on automobile intercooler intake pipe |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948507A (en) * | 2015-05-29 | 2015-09-30 | 重庆长安汽车股份有限公司 | Compressor degassing noise control structure |
| CN105023567A (en) * | 2015-07-06 | 2015-11-04 | 珠海格力电器股份有限公司 | Resonant silencer |
| CN105927594A (en) * | 2016-06-22 | 2016-09-07 | 湖南天雁机械有限责任公司 | Muffler of turbocharger |
| CN106121881A (en) * | 2016-07-29 | 2016-11-16 | 重庆长安汽车股份有限公司 | High frequency acoustic filter in vehicle intercooler air inlet pipe |
| CN106468211A (en) * | 2015-08-18 | 2017-03-01 | 上海汽车集团股份有限公司 | Automobile, electromotor, the acoustic filter located at supercharger gas outlet and forming method |
| 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 |
| CN109681354A (en) * | 2018-12-22 | 2019-04-26 | 江铃控股有限公司 | Silencing means, automobile air inlet system and automobile |
| CN111140414A (en) * | 2018-11-05 | 2020-05-12 | 和承 R & A 株式会社 | Resonator with excellent sealing performance |
| CN111512038A (en) * | 2017-12-20 | 2020-08-07 | 梦达驰德国有限公司 | Wide-band muffler for motor vehicle engine |
| CN112610300A (en) * | 2019-10-06 | 2021-04-06 | 江苏业安环保设备科技有限公司 | Low-flow-resistance broadband composite gas circuit silencer |
| CN112610304A (en) * | 2019-10-06 | 2021-04-06 | 江苏业安环保设备科技有限公司 | Rotary double-cavity silencer for extinguishing spark |
| CN112943493A (en) * | 2021-01-18 | 2021-06-11 | 华晨鑫源重庆汽车有限公司 | Automobile air inlet high-frequency resonance cavity with novel structure |
| CN114321553A (en) * | 2021-12-29 | 2022-04-12 | 南京大学 | Broadband pipeline silencer based on gradual change impedance boundary |
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| CN102588166A (en) * | 2011-01-13 | 2012-07-18 | Ls美创有限公司 | Resonator |
| CN102913355A (en) * | 2012-11-02 | 2013-02-06 | 重庆大学 | Single-cavity multi-resonant-frequency lateral-support resonant muffler |
| CN202832715U (en) * | 2012-08-11 | 2013-03-27 | 郭荣 | Broadband muffler |
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| JP2005009322A (en) * | 2003-06-16 | 2005-01-13 | Inoac Corp | Intake duct |
| CN2830681Y (en) * | 2005-08-23 | 2006-10-25 | 重庆长安汽车股份有限公司 | Air cleaner inletting tube structure with silencer for automotive engine |
| CN102588166A (en) * | 2011-01-13 | 2012-07-18 | Ls美创有限公司 | Resonator |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948507A (en) * | 2015-05-29 | 2015-09-30 | 重庆长安汽车股份有限公司 | Compressor degassing noise control structure |
| CN105023567A (en) * | 2015-07-06 | 2015-11-04 | 珠海格力电器股份有限公司 | Resonant silencer |
| CN106468211A (en) * | 2015-08-18 | 2017-03-01 | 上海汽车集团股份有限公司 | Automobile, electromotor, the acoustic filter located at supercharger gas outlet and forming method |
| CN105927594A (en) * | 2016-06-22 | 2016-09-07 | 湖南天雁机械有限责任公司 | Muffler of turbocharger |
| CN106121881A (en) * | 2016-07-29 | 2016-11-16 | 重庆长安汽车股份有限公司 | High frequency acoustic filter in vehicle intercooler air inlet pipe |
| 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 |
| CN111512038A (en) * | 2017-12-20 | 2020-08-07 | 梦达驰德国有限公司 | Wide-band muffler for motor vehicle engine |
| CN111512038B (en) * | 2017-12-20 | 2022-06-14 | 梦达驰德国有限公司 | Wide-band muffler for motor vehicle engine |
| CN111140414A (en) * | 2018-11-05 | 2020-05-12 | 和承 R & A 株式会社 | Resonator with excellent sealing performance |
| CN111140414B (en) * | 2018-11-05 | 2021-12-07 | 和承 R & A 株式会社 | Resonator with excellent sealing performance |
| US11236714B2 (en) | 2018-11-05 | 2022-02-01 | Hs R & A Co., Ltd. | Resonator having excellent airtightness |
| CN109681354A (en) * | 2018-12-22 | 2019-04-26 | 江铃控股有限公司 | Silencing means, automobile air inlet system and automobile |
| CN112610300A (en) * | 2019-10-06 | 2021-04-06 | 江苏业安环保设备科技有限公司 | Low-flow-resistance broadband composite gas circuit silencer |
| CN112610304A (en) * | 2019-10-06 | 2021-04-06 | 江苏业安环保设备科技有限公司 | Rotary double-cavity silencer for extinguishing spark |
| CN112943493A (en) * | 2021-01-18 | 2021-06-11 | 华晨鑫源重庆汽车有限公司 | Automobile air inlet high-frequency resonance cavity with novel structure |
| CN112943493B (en) * | 2021-01-18 | 2024-03-22 | 鑫源汽车有限公司 | Automobile air inlet high-frequency resonant cavity with novel structure |
| CN114321553A (en) * | 2021-12-29 | 2022-04-12 | 南京大学 | Broadband pipeline silencer based on gradual change impedance boundary |
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Application publication date: 20141224 |