CN104575482A - Air silencer - Google Patents
Air silencer Download PDFInfo
- Publication number
- CN104575482A CN104575482A CN201410835146.8A CN201410835146A CN104575482A CN 104575482 A CN104575482 A CN 104575482A CN 201410835146 A CN201410835146 A CN 201410835146A CN 104575482 A CN104575482 A CN 104575482A
- Authority
- CN
- China
- Prior art keywords
- chamber
- air
- air silencer
- cavity
- sound absorption
- 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.)
- Pending
Links
Landscapes
- Exhaust Silencers (AREA)
Abstract
The invention relates to an air silencer which comprises an outer barrel body, an air inlet pipe and an air outlet pipe, wherein the inner part of the outer barrel body is partitioned into a first cavity and a second cavity by a partition plate; a plurality of air pipes communicated with the first cavity and the second cavity are arranged on the partition plate; a distance between the first end face, positioned in the first cavity, of the air inlet pipe and the partition plate is smaller than a distance between the second end face, positioned in the first cavity, of each air pipe; a sound absorption structure for sound absorption is formed in the second cavity; a resisting silencer is arranged in the first cavity, and a resistive silencer is arranged in the second cavity, so that low, medium and high-frequency noise in high-speed air flow can be eliminated; after entering the first cavity, external high-speed air flow flows towards the partition plate and then returns so as to enter the second cavity from the air pipes; therefore, all the air flows go through such a 'backflow' process in the first cavity, and the air silencer disclosed by the invention is extremely good in silencing and noise reduction effects under an environment with high pressure difference and high flowing speed.
Description
Technical field
The present invention relates to a kind of air silencer, belong to noise reducing apparatus field.
Background technology
Exhaust box refers to what the principles such as absorption according to sound, reflection and interference manufactured, in order to reduce the noise of sound source radiation.Make in chemical field, the chemical reaction in reaction vessel needs to carry out in high pressure or vacuum environment, no matter is high pressure or vacuum, there is huge pressure differential between reaction vessel interior and extraneous air.Thus chemical reaction complete after need to break high pressure or vacuum time, just will inevitably along with the high-rate discharge of gas or absorption, and in discharge or absorb or greatly noise will be produced in process, produce noise pollution.And along with discharge or the continuation of absorption process, between reaction vessel interior and extraneous air, pressure differential reduces gradually, gas velocity and power reduce, and now exhaust box can not hinder gas purging or absorption.
The kind of exhaust box is a lot, according to noise elimination mechanism, they can be divided into six kinds of main types, i.e. resistive muffler, resistant noise-reducing device, impedance complex formula exhaust box, microperforated panel exhaust box, aperture exhaust box and active exhaust box again.
Chinese patent literature CN 202117742U discloses a kind of resistance-and-reactance-compounded exhaust silencer, forms resistant noise-reducing device by the resonantron of reducing; Be made up the silencing block of porous fire proofing material of ultra-fine fibre glass and high-temperature rock-wool to form resistive muffler, this exhaust box can work in hot environment, and significantly can reduce senior middle school's low frequency noise that internal combustion unit produces.But, this muffler is only applicable to the exhaust box as internal combustion engine, when using in the working environment of High Pressure Difference and high flow rate, due to air-flow through resistant noise-reducing device resonantron through in resistive muffler, thus the flow time of air-flow in resistant noise-reducing device is short, resistant noise-reducing device cannot eliminate medium and low frequency noise completely, undesirable when thus sound-deadening and noise-reducing effect uses in high pressure differential environment.
Summary of the invention
For this reason, technical matters to be solved by this invention is the problem solving exhaust box of the prior art sound-deadening and noise-reducing weak effect when using under the environment of High Pressure Difference high flow rate, thus propose a kind of can at the environment of High Pressure Difference high flow rate, the air silencer that sound-deadening and noise-reducing is effective.
For solving the problems of the technologies described above, a kind of air silencer of the present invention, comprise: outer cylinder body, the inside of described outer cylinder body is separated by demarcation strip and forms the first chamber and the second chamber, the two ends of described outer cylinder body are respectively arranged with the draft tube that is connected with the first chamber and the escape pipe with the second chamber, described demarcation strip is provided with some tracheaes of connection first chamber and the second chamber, the first end face that described draft tube is positioned at the first chamber is less than to the distance of demarcation strip the distance of the second end face to demarcation strip that described tracheae is positioned at the first chamber, the sound absorption structure for absorbing sound is formed in described second chamber.
Air silencer of the present invention, along the first chamber length direction, described first end face is the 5%-10% of the first chamber total length to the distance of described second end face.
Air silencer of the present invention, that the gas path cross sections of tracheae described in several amasss and long-pending with the gas path cross sections of described draft tube ratio is 0.9-1.1:1.
Air silencer of the present invention, described tracheae is radially uniformly distributed in the inside of described first chamber and the second chamber.
Air silencer of the present invention, the end that described draft tube and described tracheae are positioned at described first chamber is arranged with Venturi tube respectively.
Air silencer of the present invention, described sound absorption structure comprises the gas plate of the porous be arranged in described second chamber, acoustic absorbant is provided with between the inwall of described gas plate and described second chamber, described gas plate surrounds flowing lumen, the inside of described flowing lumen arranges sound absorption inner core, the outer wall of described sound absorption inner core is covered with through hole, between the outer wall of described sound absorption inner core and the inwall of described flowing lumen, forms the gas channel of the annular that supplied gas is passed through.
Air silencer of the present invention, described sound absorption inner core has cylindrical shape interlude, and is positioned at the conical head and the tail section at interlude two ends, and conical head and the tail section is symmetrical relative to the longitudinal axis of cylindrical shape interlude.
Air silencer of the present invention, described outer cylinder body has the contraction section reduced gradually towards described escape pipe direction internal diameter near the position of described escape pipe.
Air silencer of the present invention, the cross-sectional area of described gas channel is 1.8-2.5 times of draft tube cross-sectional area, and the cross-sectional area of described gas channel is the 1%-5% that described second chamber cross section amasss.
Air silencer of the present invention, the length of described gas channel is not less than 45% of the second chamber length, and is not more than 65% of the second chamber length.
Air silencer of the present invention, in described second chamber, is provided with the dividing plate of porous between described tracheae and described gas plate, and the internal diameter of described dividing plate increases gradually towards described tracheae direction.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) air silencer of the present invention, be arranged to the first end face of the draft tube in the first chamber to the distance L1 of demarcation strip to be less than the distance L2 of the second end face to demarcation strip of described tracheae, make high velocity air after entering the first chamber of large space, by the amplification in space, cushion high velocity air, made gas velocity slack-off.High velocity air first flows towards the direction of demarcation strip after entering the first chamber in addition, and then return and enter the second chamber from tracheae, thus all air-flows all must experience the process of such " backflow " in the first chamber, on the one hand, the residence time of air-flow in the first chamber is added; On the other hand, the air-flow having stopped to enter from draft tube the first chamber directly flow into from tracheae the second chamber along Primordial Qi flow path direction, make all gas in air-flow all in the first chamber, obtain noise reduction noise reduction effect, make air silencer of the present invention under the environment of High Pressure Difference high flow rate, have extraordinary sound-deadening and noise-reducing effect.
(2) air silencer of the present invention, described first end face to described second end face distance L2-L1 and account for the number percent of the first chamber total length, be related to the air-flow residence time in the first chamber, apart from short, fraction is had directly to enter in tracheae, thus cause sound-deadening and noise-reducing effect to reduce, distance also can increase resistance, air-flow is caused to run difficulty, air silencer of the present invention, along the first chamber length direction, described first end face is the 5%-10% of the first chamber total length to the distance of described second end face, the setting of this ratio combines noise reduction and circulation efficiency, resultant effect is better.
(3) air silencer of the present invention, air silencer of the present invention, that the gas path cross sections of tracheae described in several amasss and long-pending with the gas path cross sections of described draft tube ratio is 0.9-1.1:1, also be, that the gas path cross sections of tracheae described in several amasss and long-pending substantially equal with the gas path cross sections of described draft tube, can ensure that the gas influx of the first chamber is substantially equal with discharge like this, make air silencer of the present invention can the operation of held stationary.
(4) air silencer of the present invention, arranges many equally distributed tracheaes and is communicated with the first chamber and the second chamber makes air-flow can more be evenly distributed in the second chamber.
(5) air silencer of the present invention, the end that described draft tube and described tracheae are positioned at described first chamber is arranged with Venturi tube respectively.Reducing air silencer to the resistance of airflow by arranging Venturi tube, gas being circulated more smooth and easy.
(6) air silencer of the present invention, air-flow, when the gas channel by annular, is eliminated the medium-high frequency noise in air-flow by sound absorption inner core and acoustic absorbant.Because gas channel is large compared with draft tube cross-sectional area, thus the through-rate of air-flow in gas channel can reduce, and makes air-flow have time enough and sound absorption inner core and acoustic absorbant effect, improves sound-deadening and noise-reducing effect.Gas channel is set to annular can make whole sound absorption inner cores and sound absorption Cottonopolis can play sound-deadening and noise-reducing effect.In addition, arrange 1.8-2.5 times that gas channel cross-sectional area is draft tube cross-sectional area, and during the 1-5% that the cross-sectional area of gas channel is the second chamber cross section to be amassed, there is excellent sound-deadening and noise-reducing effect, can not cause excessive resistance to air-flow again, be also most economical comparatively worthwhile technical scheme simultaneously simultaneously.
(7) air silencer of the present invention, described outer cylinder body has the contraction section reduced gradually towards described escape pipe direction internal diameter near the position of described escape pipe.The region reduced gradually in the position installation space near escape pipe can make air-flow flow out more smooth and easy.
(8) air silencer of the present invention, second chamber is separated by described dividing plate, form the temporary chamber near described tracheae, and be provided with the sound absorption chamber of sound absorption structure, temporary chamber can storage area gas, make air-flow become more mild, time particularly for pulsed gas flow, air-flow can be made gently to pass through air silencer.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the longitudinal section of air silencer in the embodiment of the present invention 1;
Fig. 2 is the cut-open view along A-A face in Fig. 1;
Fig. 3 is the cut-open view along B-B face in Fig. 1;
Fig. 4 is the longitudinal section of inner core of absorbing sound in the embodiment of the present invention 1;
Fig. 5 is the gas circulation status of air silencer in the embodiment of the present invention 1.
In figure, Reference numeral is expressed as: 1-outer cylinder body, 11-first chamber, 12-second chamber, 121-gas plate, and 122-absorbs sound inner core, 122a-interlude, 122b-head and the tail section, 123-dividing plate, 124-gas channel; 2-draft tube, 21-first end face; 3-escape pipe; 4-demarcation strip, 41-tracheae, 42-second end face; 9-Venturi tube.
Embodiment
Embodiment 1
The present embodiment provides a kind of air silencer, as Figure 1-4, comprise: outer cylinder body 1, the inside of described outer cylinder body 1 is separated by demarcation strip 4 and forms the first chamber 11 and the second chamber 12, the two ends of described outer cylinder body 1 are respectively arranged with the draft tube 2 be communicated with the first chamber 11 and the escape pipe 12 be communicated with the second chamber 12, described demarcation strip 4 is provided with the some tracheaes 41 of connection first chamber 11 and the second chamber 12, the first end face 21 that described draft tube 2 is positioned at the first chamber 11 is less than to the distance L1 of demarcation strip 4 the distance L2 of the second end face 42 to demarcation strip 4 that described tracheae 2 is positioned at the first chamber 11, the sound absorption structure for absorbing sound is formed in described second chamber 12.
First chamber 11 of the present embodiment is reactive muffler, for eliminating the medium and low frequency noise in high velocity air; Second chamber 12 is dissipative muffler, for eliminating the medium-high frequency noise in high velocity air.Be arranged to the first end face 21 of the draft tube 2 in the first chamber 11 to the distance L1 of demarcation strip 4 to be less than the distance L2 of the second end face 42 to demarcation strip 4 of described tracheae 2, make high velocity air after entering the first chamber 11 of large space, by the amplification in space, cushion high velocity air, made gas velocity slack-off.High velocity air first flows towards the direction of demarcation strip 4 after entering the first chamber 11 in addition, and then return and enter the second chamber 12 from tracheae 41, thus all air-flows all must experience the process of such " backflow " in the first chamber 11, as shown in Figure 5, on the one hand, the residence time of air-flow in the first chamber 11 is added; On the other hand, the air-flow having stopped to enter from draft tube 2 first chamber 11 directly flow into from tracheae 41 second chamber 12 along Primordial Qi flow path direction, make all gas in air-flow all in the first chamber 11, obtain noise reduction noise reduction effect, make the air silencer of the present embodiment under the environment of High Pressure Difference high flow rate, have extraordinary sound-deadening and noise-reducing effect.If air-flow directly flow into the second chamber 12 from tracheae 41 along Primordial Qi flow path direction, the part air-flow flowed directly in the second chamber 12 can be made to be subject to the noise reduction noise reduction effect of the first chamber 11 more weak, cannot be subject to the noise reduction noise reduction effect of the first chamber 11 even completely, the noise of the medium and low frequency entrained by it cannot be got rid of completely.
The air silencer of the present embodiment, along the first chamber 11 length direction, described first end face 21 is preferably 6% of the first chamber 11 total length to the distance L2-L1 of described second end face 42.Certainly this value also can be chosen, as 5%, 7%, 8%, 9%, 10% between 5%-10%.
Described first end face 21 to described second end face 42 distance L2-L1 and account for the number percent of the first chamber 11 total length, be related to the residence time of air-flow in the first chamber 11, apart from short, fraction is had will directly to enter in tracheae 41, thus cause sound-deadening and noise-reducing effect to reduce, distance not only increases cost also can increase resistance, causes air-flow to run difficulty.The setting of the aforementioned proportion of the present embodiment combines noise reduction and circulation efficiency, and resultant effect is better.
The air silencer of the present embodiment is that the gas path cross sections of tracheae 41 described in several amasss and amass equal with the gas path cross sections of described draft tube 2.Also can be set to: the gas path cross sections of described tracheae 41 amasss and the ratio long-pending with the gas path cross sections of described draft tube 2 is 0.9:1, or 1.1:1, or any number between 0.9:1 to 1.1:1.
That the gas path cross sections of tracheae described in several 41 is amassed and with the gas path cross sections of described draft tube 2 long-pending be arranged to substantially equal, just can ensure that the influx of gas in the first chamber 11 keeps equal substantially with discharge, make the air silencer of the present embodiment can the operation of held stationary.
The air silencer of the present embodiment, the quantity of described tracheae 41 is preferably 4 and is radially uniformly distributed in the inside of described first chamber 11 and the second chamber 12.The quantity of certain described tracheae 41 also can be 3,5 or 6.Many equally distributed tracheaes 41 are set and are communicated with the first chamber 11 and the second chamber 12 makes air-flow can more be evenly distributed in the second chamber 12.
The air silencer of the present embodiment, the end that described draft tube 2 and described tracheae 41 are positioned at described first chamber 11 is arranged with Venturi tube 9 respectively.
Reducing the resistance of air silencer to airflow by arranging Venturi tube 9, gas being circulated more smooth and easy.
The air silencer of the present embodiment, described sound absorption structure comprises the gas plate 121 of the porous be arranged in described second chamber 12, acoustic absorbant is provided with between the inwall of described gas plate 121 and described second chamber 12, be specially sound absorption cotton, described gas plate 121 surrounds flowing lumen, the inside of described flowing lumen arranges sound absorption inner core 122, the outer wall of described sound absorption inner core 122 is covered with through hole, between the outer wall of described sound absorption inner core 122 and the inwall of described flowing lumen, forms the gas channel 124 of the annular that supplied gas is passed through.Gas channel 124 cross-sectional area of annular is preferably 2 times of draft tube 2 cross-sectional area.The cross-sectional area of described gas channel 124 is 1.6% of described second chamber 12 cross-sectional area.In addition, the length of described gas channel 124 should be not less than 45% of the second chamber 12 length, and is not more than 65% of the second chamber 12 length, is 58% in the present embodiment.
Certainly, as more preferably technical scheme, gas channel 124 cross-sectional area and the ratio of draft tube 2 cross-sectional area also can be any values within the scope of 1.8:1,2.2:1,2.4:1 and 1.8-2.5:1.Gas channel 124 cross-sectional area is the arbitrary value between 1%, 2%, 3%, 4%, 5% and 1-5% of draft tube 2 cross-sectional area.
Air-flow is when the gas channel 124 by annular, and absorbed sound inner core 122 and the cotton medium-high frequency noise eliminated in air-flow of sound absorption.Because gas channel 124 is large compared with draft tube 2 cross-sectional area, thus the through-rate of air-flow in gas channel 124 can reduce, and makes air-flow have time enough and sound absorption inner core 122 and cotton the acting on that absorb sound, improves sound-deadening and noise-reducing effect.Gas channel 124 is set to annular can make whole sound absorption inner cores 122 and sound absorption Cottonopolis can play sound-deadening and noise-reducing effect.In addition, 2 times that are set to that gas channel 124 cross-sectional area is draft tube 2 cross-sectional area, and the cross-sectional area of gas channel 124 is when being 1.6% of the second chamber 12 cross-sectional area, there is excellent sound-deadening and noise-reducing effect, can not cause excessive resistance to air-flow again, be also most economical comparatively worthwhile technical scheme simultaneously simultaneously.
The air silencer of the present embodiment, described sound absorption inner core 122 has cylindrical shape interlude 122a, and is positioned at the conical head and the tail section 122b at interlude two ends, and conical head and the tail section is symmetrical relative to the longitudinal axis of cylindrical shape interlude.Gas channel 124 is formed by the outer wall of the gentle plate 121 of the outer wall of interlude 122a specifically, and the sqouynd absorption lowering noise effect in the second chamber 12 mainly completes herein.Conical head and the tail section 122b also partly can absorb noise towards the two ends extension of sound absorption inner core 122.Such shape arranges the Noise Reduction having given full play to sound absorption inner core 122.
Sound absorption inner core 122 from outer toward in, be respectively the outer wall of stainless steel porous, stainless steel filtering net, sound absorption cloth, in sound absorption cloth, fill completely centrifugally glass-wool.Can obtain good sound-deadening and noise-reducing effect by this set, the setting of outer wall, stainless steel filtering net and sound absorption cloth can make rotary glass cotton-wadded quilt firmly be arranged in sound absorption inner core 122.
The air silencer of the present embodiment, described outer cylinder body 1 has the contraction section reduced gradually towards described escape pipe 3 direction internal diameter near the position of described escape pipe 3.The region reduced gradually in the position installation space near escape pipe 3 can make air-flow flow out more smooth and easy.
The air silencer of the present embodiment, in described second chamber 12, is provided with the dividing plate 123 of porous between described tracheae 41 and described gas plate 121, and the internal diameter of described dividing plate 123 increases gradually towards the direction of described tracheae 41.
Second chamber 12 is separated by described dividing plate 123, form the temporary chamber near described tracheae 41, and be provided with the sound absorption chamber of sound absorption structure, temporary chamber can storage area gas, air-flow is made to become milder, time particularly for pulsed gas flow, air-flow can be made gently to pass through air silencer.
The air silencer of the present embodiment, noise can be reduced to below 50dB by actual detection.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (11)
1. an air silencer, it is characterized in that, comprise: outer cylinder body (1), the inside of described outer cylinder body (1) is separated by demarcation strip (4) and forms the first chamber (11) and the second chamber (12), the two ends of described outer cylinder body (1) are respectively arranged with the draft tube (2) that is connected with the first chamber (11) and the escape pipe (12) with the second chamber, described demarcation strip (4) is provided with the some tracheaes (41) of connection first chamber (11) and the second chamber (12), the first end face (21) that described draft tube (2) is positioned at the first chamber (11) is less than to the distance of demarcation strip (4) distance of the second end face (42) to demarcation strip (4) that described tracheae (2) is positioned at the first chamber (11), the sound absorption structure for absorbing sound is formed in described second chamber (12).
2. air silencer according to claim 1, it is characterized in that, along the first chamber (11) length direction, described first end face (21) is the 5%-10% of the first chamber (11) total length to the distance of described second end face (42).
3. air silencer according to claim 1, is characterized in that, the gas path cross sections of tracheae described in several (41) long-pending and the ratio long-pending with the gas path cross sections of described draft tube (2) be 0.9-1.1:1.
4., according to the arbitrary described air silencer of claim 1-3, it is characterized in that, described tracheae (41) is radially uniformly distributed in the inside of described first chamber (11) and the second chamber (12).
5. according to the arbitrary described air silencer of claim 1-4, it is characterized in that, the end that described draft tube (2) and described tracheae (41) are positioned at described first chamber (11) is arranged with Venturi tube (9) respectively.
6. the air silencer according to any one of claim 1-5, it is characterized in that, described sound absorption structure comprises the gas plate (121) of the porous be arranged in described second chamber (12), acoustic absorbant is provided with between described gas plate (121) and the inwall of described second chamber (12), described gas plate (121) surrounds flowing lumen, the inside of described flowing lumen arranges sound absorption inner core (122), the outer wall of described sound absorption inner core (122) is covered with through hole, the gas channel (124) of the annular that supplied gas is passed through is formed between the outer wall of described sound absorption inner core (122) and the inwall of described flowing lumen.
7. air silencer according to claim 6, it is characterized in that, described sound absorption inner core (122) has cylindrical shape interlude (122a), and being positioned at the conical head and the tail section (122b) at interlude two ends, conical head and the tail section is symmetrical relative to the longitudinal axis of cylindrical shape interlude.
8., according to the arbitrary described air silencer of claim 1-6, it is characterized in that, described outer cylinder body (1) has near the position of described escape pipe (3) contraction section reduced gradually towards described escape pipe (3) direction internal diameter.
9. the air silencer according to claim 7 or 8, it is characterized in that, the cross-sectional area of described gas channel (124) is 1.8-2.5 times of draft tube (2) cross-sectional area, and the cross-sectional area of described gas channel (124) is the 1%-5% of described second chamber (12) cross-sectional area.
10. according to the arbitrary described air silencer of claim 7-9, it is characterized in that, the length of described gas channel (124) is not less than 45% of the second chamber (12) length, and is not more than 65% of the second chamber (12) length.
11. according to the arbitrary described air silencer of claim 6-10, it is characterized in that, in described second chamber (12), between described tracheae (41) and described gas plate (121), be provided with the dividing plate (123) of porous, the internal diameter of described dividing plate (123) increases gradually towards described tracheae (41) direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410835146.8A CN104575482A (en) | 2014-12-29 | 2014-12-29 | Air silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410835146.8A CN104575482A (en) | 2014-12-29 | 2014-12-29 | Air silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104575482A true CN104575482A (en) | 2015-04-29 |
Family
ID=53091386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410835146.8A Pending CN104575482A (en) | 2014-12-29 | 2014-12-29 | Air silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104575482A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128434A (en) * | 2016-08-24 | 2016-11-16 | 邓世忠 | A kind of support of wind instrument |
| CN106251851A (en) * | 2016-07-29 | 2016-12-21 | 潘泉方 | High temperature and high pressure steam/gas discharge composite muffler |
| CN107564507A (en) * | 2017-10-11 | 2018-01-09 | 江苏声立方环保科技有限公司 | High velocity air exhaust silencer |
| CN107850087A (en) * | 2015-07-22 | 2018-03-27 | 开利公司 | Diffuser limitation ring |
| CN107906057A (en) * | 2017-10-27 | 2018-04-13 | 艾珍机械设备制造（上海）有限公司 | Muffler without sound-absorbing material |
| CN108665884A (en) * | 2018-04-24 | 2018-10-16 | 厦门大学 | A kind of cavity noise suppressing method based on rotary slotted cylinder |
| CN110332153A (en) * | 2019-08-21 | 2019-10-15 | 湖北襄化机械设备有限公司 | A kind of continuous silencing means of multistage |
| CN111760138A (en) * | 2020-07-24 | 2020-10-13 | 蔺淑娟 | Noise-reduction medical atomizer |
| CN112243924A (en) * | 2020-09-29 | 2021-01-22 | 吴磊 | Silencing and oxygen supplying device for water inflow in fish tank |
| CN112447160A (en) * | 2019-08-30 | 2021-03-05 | 上海微电子装备（集团）股份有限公司 | Silencing structure, silencing device, equipment comprising motion table and photoetching equipment |
| CN113628601A (en) * | 2021-08-25 | 2021-11-09 | 宁波吉士汽配有限公司 | Silencer |
| CN114592944A (en) * | 2021-12-29 | 2022-06-07 | 江苏徐海环境监测有限公司 | Noise treatment equipment and use method thereof |
| CN115143076A (en) * | 2021-03-31 | 2022-10-04 | 安徽美芝制冷设备有限公司 | Suction muffler, compressor and household appliance |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB336705A (en) * | 1929-08-10 | 1930-10-23 | Horace Gastineau Hills | Improvements in exhaust silencers |
| GB1198549A (en) * | 1967-06-29 | 1970-07-15 | Par Acoustics Ltd | Silencers. |
| US3811531A (en) * | 1971-12-06 | 1974-05-21 | Safety Vehicles Develop | Silencer |
| GB1363071A (en) * | 1971-07-16 | 1974-08-14 | Bateman Mould Tools Ltd | Engine exhaus gas silencers |
| JPS6045712A (en) * | 1983-08-20 | 1985-03-12 | Honda Motor Co Ltd | Covering and protection device of exhaust purifier in exhaust system of internal-combustion engine |
| DE3413998A1 (en) * | 1984-04-13 | 1985-10-17 | Peter 8999 Simmerberg Steinl | Silencing system for combustion engines |
| CN2165230Y (en) * | 1993-06-04 | 1994-05-18 | 许仁忠 | Exhaust catalytic purifying muffler |
| CN2323138Y (en) * | 1998-02-13 | 1999-06-09 | 苏影 | Exhaust gas smoke-eliminating purifier for car |
| CN1233707A (en) * | 1999-05-12 | 1999-11-03 | 曾尚初 | Low resistance and high efficiency silencer |
| CN201236736Y (en) * | 2008-08-06 | 2009-05-13 | 哈尔滨东安发动机（集团）有限公司 | Exhaustion silencing apparatus |
| CN102748096A (en) * | 2012-04-25 | 2012-10-24 | 常州窦氏气动机械有限公司 | Noise elimination device for pneumatic motor |
| CN202510190U (en) * | 2012-04-25 | 2012-10-31 | 常州窦氏气动机械有限公司 | Silencer for pneumatic motor |
| CN103133087A (en) * | 2011-11-27 | 2013-06-05 | 何良智 | Silencer inner ball pneumatic buffering separating plate |
| CN103835787A (en) * | 2014-03-17 | 2014-06-04 | 威海市天罡仪表股份有限公司 | Automobile exhaust filtering silencer |
| CN204375412U (en) * | 2014-12-29 | 2015-06-03 | 浙江天晨胶业股份有限公司 | A kind of air silencer |
-
2014
- 2014-12-29 CN CN201410835146.8A patent/CN104575482A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB336705A (en) * | 1929-08-10 | 1930-10-23 | Horace Gastineau Hills | Improvements in exhaust silencers |
| GB1198549A (en) * | 1967-06-29 | 1970-07-15 | Par Acoustics Ltd | Silencers. |
| GB1363071A (en) * | 1971-07-16 | 1974-08-14 | Bateman Mould Tools Ltd | Engine exhaus gas silencers |
| US3811531A (en) * | 1971-12-06 | 1974-05-21 | Safety Vehicles Develop | Silencer |
| JPS6045712A (en) * | 1983-08-20 | 1985-03-12 | Honda Motor Co Ltd | Covering and protection device of exhaust purifier in exhaust system of internal-combustion engine |
| DE3413998A1 (en) * | 1984-04-13 | 1985-10-17 | Peter 8999 Simmerberg Steinl | Silencing system for combustion engines |
| CN2165230Y (en) * | 1993-06-04 | 1994-05-18 | 许仁忠 | Exhaust catalytic purifying muffler |
| CN2323138Y (en) * | 1998-02-13 | 1999-06-09 | 苏影 | Exhaust gas smoke-eliminating purifier for car |
| CN1233707A (en) * | 1999-05-12 | 1999-11-03 | 曾尚初 | Low resistance and high efficiency silencer |
| CN201236736Y (en) * | 2008-08-06 | 2009-05-13 | 哈尔滨东安发动机（集团）有限公司 | Exhaustion silencing apparatus |
| CN103133087A (en) * | 2011-11-27 | 2013-06-05 | 何良智 | Silencer inner ball pneumatic buffering separating plate |
| CN102748096A (en) * | 2012-04-25 | 2012-10-24 | 常州窦氏气动机械有限公司 | Noise elimination device for pneumatic motor |
| CN202510190U (en) * | 2012-04-25 | 2012-10-31 | 常州窦氏气动机械有限公司 | Silencer for pneumatic motor |
| CN103835787A (en) * | 2014-03-17 | 2014-06-04 | 威海市天罡仪表股份有限公司 | Automobile exhaust filtering silencer |
| CN204375412U (en) * | 2014-12-29 | 2015-06-03 | 浙江天晨胶业股份有限公司 | A kind of air silencer |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107850087A (en) * | 2015-07-22 | 2018-03-27 | 开利公司 | Diffuser limitation ring |
| US10690148B2 (en) | 2015-07-22 | 2020-06-23 | Carrier Corporation | Diffuser restriction ring |
| CN106251851A (en) * | 2016-07-29 | 2016-12-21 | 潘泉方 | High temperature and high pressure steam/gas discharge composite muffler |
| CN106128434A (en) * | 2016-08-24 | 2016-11-16 | 邓世忠 | A kind of support of wind instrument |
| CN107564507A (en) * | 2017-10-11 | 2018-01-09 | 江苏声立方环保科技有限公司 | High velocity air exhaust silencer |
| CN107564507B (en) * | 2017-10-11 | 2024-04-30 | 江苏声立方环保科技有限公司 | High-speed airflow exhaust muffler |
| CN107906057A (en) * | 2017-10-27 | 2018-04-13 | 艾珍机械设备制造（上海）有限公司 | Muffler without sound-absorbing material |
| CN107906057B (en) * | 2017-10-27 | 2019-12-31 | 艾珍机械设备制造（上海）有限公司 | Silencer without sound absorbing material |
| CN108665884A (en) * | 2018-04-24 | 2018-10-16 | 厦门大学 | A kind of cavity noise suppressing method based on rotary slotted cylinder |
| CN108665884B (en) * | 2018-04-24 | 2021-04-20 | 厦门大学 | Concave cavity noise suppression method based on rotary slotted cylinder |
| CN110332153A (en) * | 2019-08-21 | 2019-10-15 | 湖北襄化机械设备有限公司 | A kind of continuous silencing means of multistage |
| CN112447160A (en) * | 2019-08-30 | 2021-03-05 | 上海微电子装备（集团）股份有限公司 | Silencing structure, silencing device, equipment comprising motion table and photoetching equipment |
| CN112447160B (en) * | 2019-08-30 | 2023-05-12 | 上海微电子装备（集团）股份有限公司 | Silencing structure, silencing device, equipment comprising motion table and photoetching equipment |
| CN111760138A (en) * | 2020-07-24 | 2020-10-13 | 蔺淑娟 | Noise-reduction medical atomizer |
| CN112243924A (en) * | 2020-09-29 | 2021-01-22 | 吴磊 | Silencing and oxygen supplying device for water inflow in fish tank |
| CN112243924B (en) * | 2020-09-29 | 2022-09-13 | 吴磊 | Silencing and oxygen supplying device for water inflow in fish tank |
| CN115143076A (en) * | 2021-03-31 | 2022-10-04 | 安徽美芝制冷设备有限公司 | Suction muffler, compressor and household appliance |
| CN115143076B (en) * | 2021-03-31 | 2023-09-12 | 安徽美芝制冷设备有限公司 | Suction muffler, compressor and household appliance |
| CN113628601B (en) * | 2021-08-25 | 2024-04-02 | 宁波吉士汽配有限公司 | Silencer |
| CN113628601A (en) * | 2021-08-25 | 2021-11-09 | 宁波吉士汽配有限公司 | Silencer |
| CN114592944A (en) * | 2021-12-29 | 2022-06-07 | 江苏徐海环境监测有限公司 | Noise treatment equipment and use method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104575482A (en) | Air silencer | |
| CN207526554U (en) | A kind of Double-casing mobile muffler | |
| CN204375412U (en) | A kind of air silencer | |
| CN106468197B (en) | A kind of wideband noise-reducing silencer | |
| CN205578066U (en) | Novel silencer | |
| CN207513659U (en) | A kind of mobile muffler | |
| CN204312163U (en) | Diesel engine silencing apparatus | |
| CN206726756U (en) | A kind of Combined type muffler for being convenient for changing muffling unit | |
| CN102619591A (en) | Airflow reverse opposite-impact silencing unit in exhaust silencer of internal combustion engine | |
| CN204716362U (en) | Engineering machinery noise-reducing silencer | |
| CN203202508U (en) | Pipeline air exhausting sound eliminator for nuclear power station | |
| CN206917701U (en) | Exhaust silencer and gas extraction system | |
| CN205663488U (en) | Porous shunting muffling device | |
| CN214118480U (en) | Impedance silencer for roots blower | |
| CN205349495U (en) | Muffler for motorcycle | |
| CN108979816A (en) | A kind of silencing apparatus reducing I. C. engine exhaust noise | |
| CN206175040U (en) | Car second grade muffler | |
| CN203515734U (en) | Composite silencer | |
| CN204783177U (en) | Diesel generating set silencer of discharging fume | |
| CN203297164U (en) | Silencer | |
| CN108386253B (en) | Loader amortization mechanism | |
| CN209688334U (en) | A kind of air exhaust muffler device of high-pressure gas pipelines valve | |
| CN213928917U (en) | Large-air-volume resistive honeycomb type silencer for air blower | |
| CN202117737U (en) | Exhaust silencer for high-capacity automobile | |
| CN103437872A (en) | Novel 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |
|
| RJ01 | Rejection of invention patent application after publication |