CN1052180A - Broad-band strip-type silencer - Google Patents
Broad-band strip-type silencer Download PDFInfo
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- CN1052180A CN1052180A CN 91100195 CN91100195A CN1052180A CN 1052180 A CN1052180 A CN 1052180A CN 91100195 CN91100195 CN 91100195 CN 91100195 A CN91100195 A CN 91100195A CN 1052180 A CN1052180 A CN 1052180A
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- plate
- acoustical plate
- silencer
- resistive
- resistive acoustical
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Abstract
A kind of broad-band strip-type silencer, its appearance and size are not more than the GB impedance complex formula silencer with air quantity, but total sound deadening capacity, especially low frequency sound deadening capacity are significantly improved than GB impedance complex formula silencer.This silencer flow resistance, the inner surface cleaning does not have corrosion, and is pollution-free, can clean and sterilize.
Description
The utility model relates to a kind of broad-band strip-type silencing apparatus that is used for air conditioner ventilation system stream control noise of air.
Existing chip and pipe silencer, bend muffler, impedance complex formula silencer and tiny hole noise silencer all are widely used in air conditioner ventilation system stream.If the full-length by single silencer is 1 meter average sound deadening capacity size of each frequency band of weighing them, the sound deadening capacity maximum of GB impedance complex formula silencer reaches 25(db so) about.Many engineers and technicians are often the preferred unit of GB impedance complex formula silencer as the elimination noise of air.GB impedance complex formula silencer mainly is made up of four parts: 1) shell steel plate; 2) expansion chamber; 3) resistive acoustical plate; 4) inlet and outlet.The thick 50mm of resistive acoustical plate sheet, a pitch of fins 90～120mm, be mainly used in and absorb the sound intermediate frequency noise, expansion chamber is used to absorb low frequency noise, because the sheet thickness of the GB impedance complex formula silencer of this structure, a pitch of fins is bigger, the sectional area of the sectional area of expansion chamber and effective air duct smaller, the low-frequency range sound deadening capacity is little, has only 8～15(db), can not satisfy requirement of engineering.For this reason, people usually use the series connection of GB impedance complex formula silencer, to increase its low frequency sound deadening capacity.In addition, the surface of the resistive acoustical plate of impedance complex formula silencer have 40% to be positioned at horizontal plane, horizontal surface is subjected to the influence of bacterium dirt particulate sedimentation pollution easily than vertical and antiplane surface.And the surface of resistive acoustical plate is that the glass fibre of one deck porous is overstated, easily storage, breeding spot and the diffuse source of adsorbent particles.
The purpose of this utility model is that a kind of broad-band strip-type silencer will be provided, its appearance and size is not more than the GB impedance complex formula silencer with air quantity, but the average sound deadening capacity of each frequency band, especially low frequency sound deadening capacity, be significantly improved than the complete again formula silencer of GB impedance, and do not have inner surface bacterium dust pollution.
The purpose of this utility model is achieved in that the sheet of resistive acoustical plate is thick by changing the surface structure of resistive acoustical plate, and a pitch of fins and assembly direction improve the average sound deadening capacity of each frequency band of strip-type silencer and avoid shelling surface contamination.It is existing that details are as follows:
The big chief of a tribe teaches the strip-type silencer sound deadening capacity empirical equation of giving in " noise control " book of showing by horse:
△L-φ（α
0） (P)/(S) L （1）
The sound deadening capacity of strip-type silencer cuts engineering S with effective passage and is inversely proportional to as can be known, with the surface area PL and the acoustic absorptivity α of effective passage
0Be directly proportional.
By this principle, for increasing sound deadening capacity, the utility model reduces to 50～80mm to the pitch of fins of resistive acoustical plate (clear distance of sheet and sheet) by 90 common～120mm, and effectively the surface area PL of passage also significantly increases thereupon.
Acoustic absorptivity α
0Relevant with the thickness of sound-absorbing material, in general, the thickness that increases acoustical plate can increase acoustic absorptivity, improves the medium and low frequency acoustically effective.The sound-absorbing material that the complete again formula silencer of GB impedance uses is the super glass wool of 18 kilograms of unit weights, the thick 50mm of sheet, the multiple one deck glass cloth in acoustical plate surface.The utility model increases to 100～200mm to the thickness of acoustical plate (sheet is thick).The surface structure of acoustical plate is influential to the Low Medium Frequency acoustically effective, through screening, the present invention has selected for use has the superficial layer of the plastic sheeting of better acoustically effective as acoustical plate to medium and low frequency, the surface of the topped acoustical plate at the glass cloth facing of plastic sheeting, and the thickness of plastic sheeting is 10～100 μ m.
By table 1 as seen, take the thickening and the blooming measure after, acoustic absorptivity is significantly improved, wherein the low frequency absorption coefficient ratio had originally had the culture of " matter ".
For keeping the acoustical plate surface cleaning, gain in strength, reduce flow resistance, the utility model adds at resistive acoustical plate plastic sheeting superficial layer and has answered the smooth anticorrosion metal perforated plate of one deck, as armour layer.It is generally acknowledged that punching rate is greater than 20% armour layer, and is little to the sound absorbing capabilities influence.The punching rate that the present invention adopts is greater than 30%, thereby can not influence acoustically effective.
The utility model acoustical plate two ends, promptly air intake and outlet air end are provided with the metal flow guide bar, and smooth garden curved metal flow guide bar and orifice plate can reduce the flow resistance about 50%, and the bending radius of garden arc flow guide bar is 50～100mm.
According to general knowledge and barodynamics principle as can be known: compare with the dust fall of the horizontal surface fungi pollution that falls, vertical and antiplane surface is difficult for contaminated.
The utility model is assemblied in the vertical plane of silencer gas channel both sides and the antiplane direction at top to resistive acoustical plate.
Since the outer surface of acoustical plate topped smooth plastic sheeting and anticorrosion metal perforated plate, resistive acoustical plate is assemblied in vertical plane and antiplane, the stream of air connects generally greater than 5 meter per seconds in addition, can think, in actual motion, the possibility that airborne bacterium dirt particulate is trapped in the acoustical plate surface is minimum.Because pollution has appearred in smooth surface exactly, also cleaning and sterilization easily.Compare GB impedance complex formula silencer, in fact the acoustical plate of glass cloth facing can't clean.
Broad-band strip-type silencer of the present utility model, its resistive acoustical plate are primary elements, can make up arbitrarily with the different appearance and sizes of different pitch of fins by requirement of engineering, to satisfy different sound deadening capacities and the requirement of different interior amount.It can " standard film " formation dispatch from the factory, assemble fast at the scene, thereby help suitability for industrialized production, transportation and installation, and can reduce investment outlay.
The surface structure and the assembly direction of the resistive acoustical plate that the utility model adopts also are applicable to the resistive and reactive muffler that improves other pattern.
In sum, the utlity model has following advantage:
1. sound deadening capacity obviously increases, and the average sound deadening capacity of each frequency band can increase by 10～15(db);
2. the low frequency sound deadening capacity is big;
3. windage is little, and nominal air delivery can increase;
4. inner surface cleans, pollution-free and nothing corrosion;
5. can clean and sterilize;
6. be convenient to suitability for industrialized production and installation;
7. primary element-acoustical plate can be made up arbitrarily, applicability is strong;
8. appearance and size does not increase.
Concrete structure of the present utility model is provided by following examples and accompanying drawing thereof.
Fig. 1 and Fig. 2 are that Fig. 3 is the A-A profilograph according to the outline drawing of the broad-band strip-type silencer that the utility model proposes, and Fig. 4 is the B-B drawing in side sectional elevation, and Fig. 5 is the big detail drawing of C-C part section.
Below in conjunction with details and the working condition of accompanying drawing detailed description according to the concrete device that the utility model proposes.
This device comprises shell steel plate (1), garden arc flow guide bar (3), vertically arranged group of property acoustical plate (2) and be positioned at resistive acoustical plate (6) and several parts such as turnover wind adpting flange (5), (5 ') on the antiplane of gas channel (4) top.
By the big detail drawing of Fig. 5 C-C part section as seen, resistive acoustical plate (2), (6) are made up of superficial layer and internal layer.Superficial layer divides three layers: anticorrosion metal perforated plate (9); Plastic sheeting (10); Glass cloth (11).Internal layer be super glass wool or other acoustic absorptivity quite or be higher than the sound-absorbing material (12) of super glass wool.The outside of super glass wool sound-absorbing material (12) all encases with glass cloth (11) and plastic sheeting (10), is seated in then in the zinc-plated lightgage steel joist frame (8), zinc-platedly is connected with rivet with anticorrosion metal perforated plate (9) through steel joist frame (8).Resistive acoustical plate (2), (6) are fixed on the shell steel plate (1) with zinc-plated lightgage steel joist frame (8), rivet (7).Air passes through silencer along direction shown in figure (3) arrow, airborne sound wave imports the resistive acoustical plate (2) that is arranged on gas channel (4) both sides and the top office antiplane into, (6), the sound wave acoustical plate (2) that crouched, (6) interior air and fiber vibration, under frictional force and viscous force effect, part acoustic energy is converted into thermal energy consumption and falls.By Fig. 3 and Fig. 4 as seen, broad-band strip-type silencer of the present utility model does not have horizontal acoustical plate, and under the effect of gravity and air-flow power, the very big resistive acoustical plate (2) that is positioned at vertical and antiplane that is trapped in of bacterium dirt particulate is on the surface of (6).The end face of gas channel (4) is resistive acoustical plate (6), and the bottom surface is smooth metal surface, shell steel plate (1) bottom surface just, and when air velocity during greater than 5 meter per seconds, the thrust of air-flow has stoped particulate sedimentation on the baseplane of gas channel (4).Like this, under working condition, broad-band strip-type silencer of the present utility model has kept the inner surface cleaning automatically.
Resistive acoustical plate shown in the drawings (2), the sheet of (6) is thick to be 100～200mm, a pitch of fins 50～80mm, during actual selecting for use, can be by above-mentioned sheet thick and pitch of fins size range, and design air flow and sound deadening capacity are specifically determined sheet sheet distance and combining form.
Garden arc flow guide bar (3) is positioned at inlet and outlet (5), and (5 ') are located, and makes of sheet metal, and bending radius is thick half of sheet, i.e. 50～100mm, and garden arc flow guide bar (3) is fixed on the zinc-plated lightgage steel joist frame (8) with aluminium rivet.
Zinc-plated lightgage steel joist frame (8) four by zinc-plated lightgage steel joist through welding or the framework formed of riveted joint, it is resistive acoustical plate (2), (6) skeleton, for guaranteeing rigidity, the spacing of the lightgage steel joist of zinc-plated lightgage steel joist frame (8) should be not more than 500mm, the cross-sectional width of lightgage steel joist and acoustical plate (2), the sheet of (6) is thick identical.Zinc-plated lightgage steel joist need not specially be processed, and it is a kind of construction material that the multiple standards scale is arranged commonly used.
Claims (6)
1, a kind of broad-band strip-type silencer comprises shell steel (1), garden arc flow guide bar (3), and vertically arranged resistive acoustical plate (2) is positioned at resistive acoustical plate (6) and turnover wind adpting flange (5) on the antiplane of gas channel (4) top, (5 '); It is characterized in that: resistive acoustical plate (2), (6) are assemblied in the vertical plane and the top antiplane of silencer gas channel (4) both sides; Vertical acoustical plate (2) and antiplane acoustical plate (6) comprise superficial layer and internal layer, and superficial layer divides (11) three layers of anticorrosion metal perforated plate (9), plastic sheeting (10) and glass fabrics, and internal layer is super glass wool sound-absorbing material (12); Resistive acoustical plate (2), (6) with zinc-plated lightgage steel joist frame (8), rivet (7) is fixed on the shell steel plate (1), anticorrosion metal perforated plate (9) is connected through the steel joist frame with zinc-plated with rivet with the lonely shape flow guide bar in garden (3), resistive acoustical plate (2), (6) super glass wool sound-absorbing material (12) outside all encases with glass fabric (11) and plastic sheeting (10), is seated in zinc-plated in steel joist frame (8) then.
2, silencer according to claim 1, the punching rate that it is characterized in that anticorrosion metal perforated plate (9) is for being equal to or greater than 30%.
3, silencer according to claim 1, the thickness that it is characterized in that plastic sheeting (10) are 10～100 μ m.
4, silencer according to claim 1 is characterized in that resistive acoustical plate (2), and the sheet of (6) is thick to be 100～200mm.
5, silencer according to claim 1, a pitch of fins that it is characterized in that resistive acoustical plate (2) is 50～80mm.
6, silencer according to claim 1 is characterized in that garden arc flow guide bar (3) is assemblied in turnover wind two ends of resistive acoustical plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91100195 CN1052180A (en) | 1991-01-16 | 1991-01-16 | Broad-band strip-type silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91100195 CN1052180A (en) | 1991-01-16 | 1991-01-16 | Broad-band strip-type silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1052180A true CN1052180A (en) | 1991-06-12 |
Family
ID=4904493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91100195 Pending CN1052180A (en) | 1991-01-16 | 1991-01-16 | Broad-band strip-type silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1052180A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541787A (en) * | 2013-11-09 | 2014-01-29 | 江苏华东正大空调设备有限公司 | Large air-volume piece type impedance composite muffler |
| CN103807995A (en) * | 2014-01-25 | 2014-05-21 | 浙江金盾风机股份有限公司 | Combined type array impedance recombination silencer |
| CN106766083A (en) * | 2016-12-06 | 2017-05-31 | 青岛海信日立空调系统有限公司 | A kind of muffler and the air-conditioning comprising the muffler |
-
1991
- 1991-01-16 CN CN 91100195 patent/CN1052180A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103541787A (en) * | 2013-11-09 | 2014-01-29 | 江苏华东正大空调设备有限公司 | Large air-volume piece type impedance composite muffler |
| CN103807995A (en) * | 2014-01-25 | 2014-05-21 | 浙江金盾风机股份有限公司 | Combined type array impedance recombination silencer |
| CN103807995B (en) * | 2014-01-25 | 2016-02-10 | 浙江金盾风机股份有限公司 | A kind of combined array impedance muffler |
| CN106766083A (en) * | 2016-12-06 | 2017-05-31 | 青岛海信日立空调系统有限公司 | A kind of muffler and the air-conditioning comprising the muffler |
| CN106766083B (en) * | 2016-12-06 | 2019-11-08 | 青岛海信日立空调系统有限公司 | A kind of muffler and the air-conditioning comprising the muffler |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |