CN104538019A - Generalized photonic crystal acoustic shield - Google Patents
Generalized photonic crystal acoustic shield Download PDFInfo
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- CN104538019A CN104538019A CN201410827052.6A CN201410827052A CN104538019A CN 104538019 A CN104538019 A CN 104538019A CN 201410827052 A CN201410827052 A CN 201410827052A CN 104538019 A CN104538019 A CN 104538019A
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Abstract
The invention provides a generalized photonic crystal acoustic shield which comprises a generalized photonic crystal column shell and a generalized photonic crystal semispherical shell connected with the generalized photonic crystal column shell. An annular boss is arranged at the bottom end of the generalized photonic crystal column shell, threaded holes are formed in the annular boss in the circumferential direction, the annular boss is connected with a base, and the generalized photonic crystal column shell and the generalized photonic crystal semispherical shell are at least provided with two cycle components from inside to outside. Each cycle component is composed of a nonmetal layer and a metal layer in sequence from inside to outside, wherein the nonmetal layer and the metal layer are attached to each other. The cycle components are attached mutually. The generalized photonic crystal acoustic shield has the advantages of being high in sound insulation, easy to mount, demount and transport, low in design and manufacturing cost and the like, and the generalized photonic crystal acoustic shield has the good vibration reduction effect on vibration within a band gap range.
Description
Technical field
The present invention relates to a kind of sound arrester, particularly relate to a kind of broad sense phonon crystal acoustic hood.
Background technology
The industrial machinery that current China produces, Design and manufacture seldom considers Noise Prevention and Treatment, so that on-streamly give off strong noise, and then make workplace cause serious noise pollution, not only affect the health of staff, reduce efficiency, and involve surrounding resident district, constantly generation dispute have impact on to produce and live and even causes all misfortune.Therefore, the living environment improving people by reducing or reduce noise pollution has great importance.
In practical implementation, Noise measarement mainly contains three kinds of approach: (1), to the control of sound source, namely starts with from sound source, improves the design of sound source structure, reduces the noise grade that sound source sends; (2) to the defense controls of sound field recipient, namely the certain safeguard measure protection of taking referring to be exposed to people in noise circumstance artificial oneself does not come to harm, generally can by wearing ear protectors, reducing the safeguard procedures such as the time be exposed in noise circumstance; (3) route of transmission controls, and is namely reduced the Propagation of Energy of sound wave by noise reduction measures such as sound absorption, sound insulation, noise eliminations.Because noise source is a lot, be very difficult from the generation of control noises source, so the method for conventional passive vibration and noise reducing suppresses the propagation of harmful vibration noise in engineering, such as on route of transmission, take sound insulation process to intercept it and propagate.With regard to existing opacity technique, acoustic hood is the most easily realization, most economical control mode in Noise measarement.Noise source is enclosed in cover by acoustic hood, to reduce peripherad sound radiation.The agent structure of acoustic hood is cover wall, this just requires that cover wall must have enough oise insulation factors to hinder sound wave propagation, according to the mass action law, the larger soundproof effect of cover wall density is better, therefore cover wall adopts heavy material to manufacture mostly, as fragment of brick, mixed earth, marble, plasterboard, steel etc.In Practical Project, need to carry out inspection and maintenance regularly to sound arrester and sound source device, usually require that acoustic hood should lightly facilitate, be convenient to mounting or dismounting and transport, but its structure of existing acoustic hood is too heavy, cannot meet above-mentioned requirements.
The noise adopting existing opacity technique no doubt can make to be delivered to vibration on structure and radiation thereof has certain decay, but the noise produced when a lot of pressurized equipment runs at present is very big, with regard to existing acoustic hood, oise insulation factor is less, can not meet the demands far away.Chinese patent (Authorization Notice No. CN203583695U) provide a kind of modular assembly type acoustic hood, be made up of framed structure, composite plate module, framed structure is made up of load steel construction, mounting groove structure, the form-factor of composite plate module is unified, comprises the forms such as compound sound absorption module, soundproof door module.
Summary of the invention
The object of the invention is to provide the broad sense phonon crystal acoustic hood that a kind of structure is simple, easy accessibility, oise insulation factor are large.
The object of the present invention is achieved like this: the broad sense phonon crystal hemispherical Shell comprising broad sense phonon crystal post shell and be connected with broad sense phonon crystal post shell, the bottom of broad sense phonon crystal post shell is provided with round ring boss, round ring boss along the circumferential direction arranges threaded hole, and round ring boss is connected with pedestal, described broad sense phonon crystal post shell and broad sense phonon crystal hemispherical Shell at least arrange two cycle constituent elements from the inside to the outside, and each cycle constituent element is non-metallic layer and metal level from the inside to the outside successively, and be bonded to each other between non-metallic layer and metal level, bonded to each other between each cycle constituent element.
The present invention also comprises some architectural features like this:
1. there are three cycle constituent elements, described broad sense phonon crystal post shell and broad sense phonon crystal hemispherical Shell are the first non-metallic layer, the first metal layer, the second non-metallic layer, the second metal level, the 3rd non-metallic layer and the 3rd metal level from the inside to the outside successively, bonded to each other between each layer.
2. evenly scribble acoustic absorbant at the inside surface of broad sense phonon crystal post shell and broad sense phonon crystal hemispherical Shell.
3. broad sense phonon crystal post shell described in and broad sense phonon crystal hemispherical Shell are one.
Compared with prior art, the invention has the beneficial effects as follows: the present invention introduces broad sense phonon crystal post shell and broad sense phonon crystal hemispherical Shell, the two is combined into acoustic hood, the acoustic band gap utilizing it to produce to suppress the propagation of sound wave in crystal cover, and changes band gap locations, band gap width and oise insulation factor by adjustment broad sense phonon crystal post shell and the structural parameters of broad sense phonon crystal hemispherical Shell, the material parameter of cycle constituent element and quantity.The present invention and existing opacity technique have essential distinction, have simultaneously oise insulation factor large, be convenient to the advantages such as mounting or dismounting and transport, design and manufacture cost are low, and the present invention has the effect of good vibration and noise reducing to the vibration in bandgap range.One-piece construction of the present invention is simple, easy accessibility, use are reliable, lower to the requirement of working environment.
Accompanying drawing explanation
Fig. 1 is broad sense phonon crystal hemispherical Shell of the present invention structural representation upward;
Fig. 2 is broad sense phonon crystal hemispherical Shell of the present invention structural representation down;
Fig. 3 has the broad sense phonon crystal post shell of three cycle constituent elements and the structural representation of hemispherical Shell assembly.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
The present invention is mainly for the sound insulation of medium-high frequency territory sound source, its principle is along post shell, the coaxial cable cylindrical shell of spherical shell radial direction periodic arrangement two kinds of unlike materials and the hemispherical Shell of concentric, form broad sense phonon crystal pole-shell structure and hemispherical Shell structure respectively, when sound wave is propagated in crystal, (the namely periodically radial) effect that disappears mutually is reflected at interphase place due to its inner different impedance operator, forms acoustic band gap and then inhibits sound wave propagation.One aspect of the present invention achieves the object of the significantly vibration and noise reducing within the scope of bandgap frequency, Extraneous vibrations also effectively can be suppressed the impact of equipment in cover body on the other hand, play the effect of protective cover.
Case study on implementation one: composition graphs 1, Fig. 2 and Fig. 3, the broad sense phonon crystal hemispherical Shell 2 that the present invention includes broad sense phonon crystal post shell 1 and be connected with broad sense phonon crystal post shell 1, the bottom of broad sense phonon crystal post shell 1 is provided with round ring boss 10, round ring boss 10 along the circumferential direction arranges threaded hole 11, and round ring boss 10 is connected with pedestal, the present invention is connected with pedestal by the connected mode be also namely bolted, also the present invention can be connected with frame or ground, described broad sense phonon crystal post shell and broad sense phonon crystal hemispherical Shell at least arrange two cycle constituent elements from the inside to the outside, and each cycle constituent element is non-metallic layer and metal level from the inside to the outside successively, and be bonded to each other between non-metallic layer and metal level, bonded to each other between each cycle constituent element, bonded to each other referring to of the present invention passes through swelling, adhesion or other rational processes are by each layer, each cycle constituent element links together.
Case study on implementation two: based on above-mentioned case study on implementation, composition graphs 3, the present invention is provided with three cycle constituent elements, described broad sense phonon crystal post shell and broad sense phonon crystal hemispherical Shell are the first non-metallic layer 4, the first metal layer 5, second non-metallic layer 6, second metal level 7, the 3rd non-metallic layer 8 and the 3rd metal level 9 from the inside to the outside successively, namely bonded to each other between each layer, also three layers of non-metal case 4,6,8 and three-layer metal shell 5,7,9 to be linked together formation three cycle broad sense photonic crystal structure by swelling, adhesion or other rational processes.
Case study on implementation three: based on above-mentioned case study on implementation, composition graphs 3, evenly scribble acoustic absorbant 3 at the inside surface of broad sense phonon crystal post shell of the present invention and broad sense phonon crystal hemispherical Shell, and the acoustic absorbant 3 evenly scribbled further can promote the sound insulation property of acoustic hood of the present invention.
Case study on implementation four: based on above-mentioned case study on implementation, consider the convenience of structure processing, assembling, be one by described broad sense phonon crystal post shell and broad sense phonon crystal hemispherical Shell, also namely broad sense phonon crystal post shell 1 and broad sense phonon crystal hemispherical Shell 2 are integrally processed by the present invention.
The present invention should be taken into account following several factor when reality uses:
1. the material of cycle constituent element.Different according to working environment, broad sense phonon crystal post shell, broad sense phonon crystal hemispherical Shell are made up of cycle constituent element, and the composition material of cycle constituent element can have multiple choices, such as non-metallic layer can adopt nylon, reinforced nylon, polymer composites etc., and metal level can adopt steel, aluminium and various alloys etc.
2. the quantity of cycle constituent element and size.Can the quantity of adjustment cycle constituent element and size according to the requirement such as physical dimension, frequency band range, to adapt to different demands.
3. the connection of acoustic hood and pedestal.Stronger structure-borne sound imports in acoustic hood can become sound radiation source, thus greatly reduces defening effect, and oise insulation factor is reduced.For acoustic hood is passed in the vibration avoided or reduce support, vibration isolator should be installed in the junction of acoustic hood and pedestal, and the necessary junction of acoustic hood and equipment (pedestal) should adopt elasticity to be flexible coupling as far as possible.
4. acoustic hood innermost layer installs perforated plate or woven wire, and to prevent coming off of acoustic absorbant, perforated plate can also absorption portion acoustic energy in addition.
Should be noted that above embodiment only in order to the present invention to be described and unrestricted, the present invention is also not limited in above-mentioned citing.All do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in right of the present invention.
Claims (5)
1. a broad sense phonon crystal acoustic hood, it is characterized in that: the broad sense phonon crystal hemispherical Shell comprising broad sense phonon crystal post shell and be connected with broad sense phonon crystal post shell, the bottom of broad sense phonon crystal post shell is provided with round ring boss, round ring boss along the circumferential direction arranges threaded hole, and round ring boss is connected with pedestal, described broad sense phonon crystal post shell and broad sense phonon crystal hemispherical Shell at least arrange two cycle constituent elements from the inside to the outside, and each cycle constituent element is non-metallic layer and metal level from the inside to the outside successively, and be bonded to each other between non-metallic layer and metal level, bonded to each other between each cycle constituent element.
2. a kind of broad sense phonon crystal acoustic hood according to claim 1, it is characterized in that: have three cycle constituent elements, described broad sense phonon crystal post shell and broad sense phonon crystal hemispherical Shell are the first non-metallic layer, the first metal layer, the second non-metallic layer, the second metal level, the 3rd non-metallic layer and the 3rd metal level from the inside to the outside successively, bonded to each other between each layer.
3. a kind of broad sense phonon crystal acoustic hood according to claim 1 and 2, is characterized in that: evenly scribble acoustic absorbant at the inside surface of broad sense phonon crystal post shell and broad sense phonon crystal hemispherical Shell.
4. a kind of broad sense phonon crystal acoustic hood according to claim 1 and 2, is characterized in that: described broad sense phonon crystal post shell and broad sense phonon crystal hemispherical Shell are one.
5. a kind of broad sense phonon crystal acoustic hood according to claim 3, is characterized in that: described broad sense phonon crystal post shell and broad sense phonon crystal hemispherical Shell are one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410827052.6A CN104538019B (en) | 2014-12-25 | 2014-12-25 | Generalized phonon crystal sound insulation cover |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410827052.6A CN104538019B (en) | 2014-12-25 | 2014-12-25 | Generalized phonon crystal sound insulation cover |
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| CN104538019A true CN104538019A (en) | 2015-04-22 |
| CN104538019B CN104538019B (en) | 2023-05-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538022A (en) * | 2014-12-25 | 2015-04-22 | 哈尔滨工程大学 | Acoustic shield based on acoustic wave band gap features of generalized photonic crystal semi-cylinder shells |
| CN105369489A (en) * | 2015-12-11 | 2016-03-02 | 杰克缝纫机股份有限公司 | Air suction device for sewing machine |
| CN105369490A (en) * | 2015-12-11 | 2016-03-02 | 杰克缝纫机股份有限公司 | Sound-attenuation dustproof cover for air suction device of sewing machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335574A (en) * | 2008-07-30 | 2008-12-31 | 哈尔滨工程大学 | Sound shielding method for multipath channel |
| CN102878235A (en) * | 2012-09-21 | 2013-01-16 | 哈尔滨工程大学 | Compound phonon crystal rod with multi-dimensional vibration absorbing function |
| CN103514873A (en) * | 2013-09-13 | 2014-01-15 | 西安交通大学 | Low-frequency vibration-isolation combined sandwiched structure |
| CN204360775U (en) * | 2014-12-25 | 2015-05-27 | 哈尔滨工程大学 | A kind of broad sense phonon crystal acoustic hood |
| US20150237423A1 (en) * | 2013-03-21 | 2015-08-20 | Bichoy BAHR | Acoustic bandgap structures for integration of mems resonators |
-
2014
- 2014-12-25 CN CN201410827052.6A patent/CN104538019B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335574A (en) * | 2008-07-30 | 2008-12-31 | 哈尔滨工程大学 | Sound shielding method for multipath channel |
| CN102878235A (en) * | 2012-09-21 | 2013-01-16 | 哈尔滨工程大学 | Compound phonon crystal rod with multi-dimensional vibration absorbing function |
| US20150237423A1 (en) * | 2013-03-21 | 2015-08-20 | Bichoy BAHR | Acoustic bandgap structures for integration of mems resonators |
| CN103514873A (en) * | 2013-09-13 | 2014-01-15 | 西安交通大学 | Low-frequency vibration-isolation combined sandwiched structure |
| CN204360775U (en) * | 2014-12-25 | 2015-05-27 | 哈尔滨工程大学 | A kind of broad sense phonon crystal acoustic hood |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538022A (en) * | 2014-12-25 | 2015-04-22 | 哈尔滨工程大学 | Acoustic shield based on acoustic wave band gap features of generalized photonic crystal semi-cylinder shells |
| CN104538022B (en) * | 2014-12-25 | 2017-08-04 | 哈尔滨工程大学 | A kind of acoustic hood based on broad sense phonon crystal attached column shell acoustic band gap characteristic |
| CN105369489A (en) * | 2015-12-11 | 2016-03-02 | 杰克缝纫机股份有限公司 | Air suction device for sewing machine |
| CN105369490A (en) * | 2015-12-11 | 2016-03-02 | 杰克缝纫机股份有限公司 | Sound-attenuation dustproof cover for air suction device of sewing machine |
| CN105369489B (en) * | 2015-12-11 | 2019-01-11 | 杰克缝纫机股份有限公司 | Sewing machine air intake device |
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| Publication number | Publication date |
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| CN104538019B (en) | 2023-05-05 |
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