CN86101514B - High-speed airstream muffler - Google Patents
High-speed airstream muffler Download PDFInfo
- Publication number
- CN86101514B CN86101514B CN86101514A CN86101514A CN86101514B CN 86101514 B CN86101514 B CN 86101514B CN 86101514 A CN86101514 A CN 86101514A CN 86101514 A CN86101514 A CN 86101514A CN 86101514 B CN86101514 B CN 86101514B
- Authority
- CN
- China
- Prior art keywords
- central airway
- housing
- dividing plate
- silencing apparatus
- present
- 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.)
- Expired
Links
Landscapes
- Separation Of Gases By Adsorption (AREA)
- Exhaust Silencers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The present invention relates to a silencer with the advantages of high gas speed resistance and strong noise resistance, which belongs to air dynamic silencers applied to industrial devices. The present invention has a special graded noise reduction structure; a gas straightly passes through a silencing cylinder in the silencing process; the resistance of the gas flow is very small so as not to affect the technological requirement of the gas phase working medium and achieve the goal of obvious noise reduction simultaneously. The present invention is suitable for strong noise reduction for power devices such as high speed nozzles, pneumatic devices, gas compressing devices, etc.
Description
The present invention relates to a kind of high velocity air silencing apparatus, it is the Pneumatic actuator that matter is separated in work that this silencing apparatus is specially adapted to the high velocity air, and high-speed air flow can keep the constant substantially function that reduces pneumatic noise that can reach again of its flow velocity by silencing apparatus.
In existing known silencing apparatus, what adopt usually is resistive or resistance or combined type noise elimination structure.Though this class silencing apparatus has the good result that reduces noise, make the size and Orientation of the airspeed that silencing apparatus comes out constant substantially and be suitable for effectively utilizing this air-flow to be difficult to realize.Its reason is that all there is gas-flow resistance in existing silencing apparatus in the noise elimination process, consume the energy of air-flow, thereby cause the reduction of airspeed, not satisfying with the high velocity air is the requirement that the Pneumatic actuator of matter is separated in work, and promptly desire obtains low noise and keeps the constant technological requirement of airspeed to exist technical difficulty.
The purpose of this invention is to provide a kind of high velocity air silencing apparatus, it can make high velocity air pass through to keep airspeed constant substantially when it is discharged, and can reach the function that reduces noise again.
According to high velocity air silencing apparatus of the present invention, it includes the turnover air pipe, housing and several chambers that enclosure interior are separated into by the dividing plate that is disposed in the housing, each dividing plate disposes the central airway that is axially offset from one another and around central airway and pass dividing plate and be several bypasses that wait through uniform and expand balance tubes, bypass on adjacent separator expansion balance tube is each other and is staggeredly arranged, central airway, housing and turnover air pipe shaft axis are altogether arranged, wall in each chamber is attached with the absorbent treatment of 10-20 millimeter, central airway, the exit end face of suction tude and bypass expansion balance tube respectively with its separately tube's axis be miter angle, the normal of the exit end face of bypass expansion balance tube points to the inwall of respective housings.
The invention has the advantages that, high velocity air enters silencing apparatus, when flowing through every section central airway outlet, because the nonsymmetry of central airway outlet port geometrical shape, the airflow noise direction of wave travel is turned back in this outlet port, and piecemeal and airflow breakaway, the sound energy attenuation in the air-flow, toot the effect altogether of each chamber and the sound absorption of chamber wall absorbent treatment cause the noise of high velocity air to reduce in addition.
Another advantage of the present invention is, main air flow at a high speed is that colimation line passes through each central airway, and air-flow is equal-volume and flows in each central airway, and the mill resistance is little, and the gas energy loss is little, thereby has kept the flow velocity of high velocity air constant substantially.
High velocity air silencing apparatus of the present invention our experiments show that, it is the effect that high velocity air more than 100 meter per seconds has obvious noise reduction for flow velocity, can make the original technological requirement of this gases flow again.
Be described in detail an embodiment's of silencing apparatus of the present invention structural behaviour, aeroperformance and acoustical behavior below in conjunction with accompanying drawing.
Accompanying drawing is an embodiment's of a high velocity air silencing apparatus of the present invention structural representation, wherein 1-steam outlet pipe 2-chamber 3-central airway 4-bypass expansion balance tube 5-housing 6-absorbent treatment 7-suction tude 8-dividing plate
With reference to accompanying drawing, it includes several not isometric chambers (2) that suction tude (7) steam outlet pipe (1) housing (5) is separated into enclosure interior by the dividing plate (8) that is configured in the housing with the high velocity air silencing apparatus of the present invention of sequence number (9) expression, pass each dividing plate center and the central airway (3) that axially disconnects each other and pass each dividing plate and be the wall that isometrical several uniform bypasses expand the described chamber of balance tubes (4) respectively around the central airway and be attached with absorbent treatment (6), the thickness of this absorbent treatment is 20 millimeters.The above-mentioned part in addition that constitutes high velocity air silencing apparatus of the present invention connects supporting means by common mechanical and constitutes as a whole (9).Bypass expansion balance tube (4) on the adjacent separator is staggeredly arranged each other, central airway (3), and turnover air pipe (1,7) collimates and is common shaft axis configuration with housing (5).In the present embodiment, the boundary dimension of this silencing apparatus is 150X400, and three dividing plates are arranged, and enclosure interior is separated into the chamber that four volumes do not wait.Central airway (3), the exit end face of bypass expansion balance tube (4) and suction tude (7) become miter angle, the normal sensing inner walls face of bypass expansion balance tube (4) exit end face with tube's axis separately respectively.When high velocity air enters from suction tude, during the exit end face of collimation by every section central airway (3), because the nonsymmetry of the geometrical shape in central airway (3) outlet port, the acoustic wave propagation direction is transferred in this outlet port, and piecemeal and airflow breakaway, the acoustic energy in the air-flow is decay piecemeal also.Central airway exit end face and axial out of plumb, also is asymmetric at outlet port air pipe internal surface to the sound reflection of air-flow, air-flow is in the peak amplitude direction of outlet port sound wave, direction turnover to the central airway normal line of butt end, thereby the sound wave direction of air-flow is separated with airflow direction, and absorbed by the absorbent treatment of each chamber in the silencing apparatus, the sympathetic response effect of each chamber in addition causes the noise of high velocity air to reduce.
It should be appreciated that, high velocity air enters silencing apparatus from suction tude (7), discharge from steam outlet pipe (1), other air-flow is that colimation line passes through each central airway (3), this central airway is by stream burst Design Theory, making high velocity air be equal-volume in each central airway flows, the tolerance that is the preceding paragraph central airway outlet tolerance of discharging and the import of next section central airway is equal substantially, and the internal surface of this central airway requires bright and clean, make the gas energy loss little, consistent thereby the airspeed of exhaust outlet keeps basically with the speed of suction tude inlet.The configuration of each section bypass expansion balance tube makes the gaseous pressure balance.
Experimental result according to high velocity air silencing apparatus of the present invention shows, under the condition that does not change the original technological requirement of air-flow, the pneumatic noise of air-flow in 1/300 second moment of discharging by silencing apparatus of the present invention reduced 11dB(A), the nozzle noise is submerged in the deduction Background noise, and acoustical absorptivity is 82.4%.Be lower than 6.5 kilograms per centimeter at pressure, airspeed is under the operating conditions of 180 meter per seconds, and its noise reduction is better.
As a kind of modification of present embodiment, the sectional shape of housing (5) can be different, as adopting Sui's circle, quadrilateral, Hexagon; The quantity of bypass expansion balance tube also can become its quantity as required; The thickness of absorbent treatment also can change thickness as required.
High velocity air silencing apparatus of the present invention can generally be applicable to high speed nozzle Pneumatic actuator, the noise elimination work of power equipments such as pressurized gas.
Claims (1)
1, a kind of high velocity air silencing apparatus, include the turnover air pipe, housing and several chambers that enclosure interior are separated into by the dividing plate that is configured in the housing, each dividing plate disposes the central airway that is axially offset from one another and around central airway and pass dividing plate and be and wait several uniform bypasses of span to expand balance tubes, bypass on adjacent separator expansion balance tube is each other and is staggeredly arranged, central airway, housing and turnover air pipe shaft axis are altogether arranged, the invention is characterized in that the wall of each chamber is attached with the absorbent treatment of 10-20 millimeter, central airway, the exit end face of suction tude and bypass expansion balance tube is miter angle with its tube's axis separately respectively, and the exit end face of bypass expansion balance tube points to the inwall of respective housings part with Normal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86101514A CN86101514B (en) | 1986-07-18 | 1986-07-18 | High-speed airstream muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86101514A CN86101514B (en) | 1986-07-18 | 1986-07-18 | High-speed airstream muffler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86101514A CN86101514A (en) | 1987-12-23 |
| CN86101514B true CN86101514B (en) | 1988-02-10 |
Family
ID=4801419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86101514A Expired CN86101514B (en) | 1986-07-18 | 1986-07-18 | High-speed airstream muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86101514B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101446219B (en) * | 2008-10-31 | 2011-03-30 | 李定初 | Carbon emission reduction muffler for vehicle |
| CN103187049B (en) * | 2013-04-02 | 2015-04-15 | 中国人民解放军国防科学技术大学 | Laminate type silencer |
-
1986
- 1986-07-18 CN CN86101514A patent/CN86101514B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN86101514A (en) | 1987-12-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6415887B1 (en) | Refractive wave muffler | |
| EP0635632B1 (en) | Noise suppression system | |
| US5491308A (en) | Turbine inlet silencer | |
| US4809812A (en) | Converging, corridor-based, sound-attenuating muffler and method | |
| SE410405B (en) | AIR TRAINER UNIT WITH SOUND Muffler | |
| CN86101514B (en) | High-speed airstream muffler | |
| US3679024A (en) | Muffler | |
| CN209688334U (en) | A kind of air exhaust muffler device of high-pressure gas pipelines valve | |
| JP3955114B2 (en) | Catalytic exhaust system for internal combustion engine | |
| CN216241522U (en) | Exhaust silencing device for processing noise of exhaust outlet of large-air-volume air pipe | |
| JPH01187309A (en) | Combustion gas silencing purifier | |
| US6305493B1 (en) | Exhaust system for internal combustion engines | |
| CN210371104U (en) | Exhaust filter of compressor | |
| JP4516162B2 (en) | Exhaust silencer | |
| WO1991005157A1 (en) | Turbine inlet silencer | |
| CN217582619U (en) | Marine composite damping silencer | |
| CN2883682Y (en) | Silencer of motorcycle | |
| CN1145448A (en) | Cyclone discharge silencer | |
| CN114673576B (en) | High-power diesel engine exhaust purifying silencing integrated device | |
| CN219974823U (en) | Silencer of water ring vacuum pump | |
| CN219529278U (en) | Disc type vortex muffler | |
| CN220895181U (en) | Noise elimination formula exhaust structure for aviation | |
| JPS63129112A (en) | Muffler | |
| CN108798828A (en) | A kind of car engine silencer | |
| CN100378300C (en) | Motorcycle silencer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB01 | Change of bibliographic data |
Change after: Shanghai vacuum electronic component Co., Ltd. Change before: Shanghai kinescope glass factory Change after: Company No. 485, Jiaozhou Road, Shanghai Change before: Zhu Meilu, 1, Shanghai |
|
| COR | Change of bibliographic data |
Free format text: CORRECT FROM: NO. 1, ZHUMEI ROAD, SHANGHAI CITY, XIANXIANGGUANBOLI FACTORY, SHANGHAI CITY TO: SHANGHAI VACUUM ELECTRON DEVICES CO.LTD.,NO.485,JIAOZHOU ROAD, SHANGHAI |
|
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |