CN204360775U - A kind of broad sense phonon crystal acoustic hood - Google Patents
A kind of broad sense phonon crystal acoustic hood Download PDFInfo
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- CN204360775U CN204360775U CN201420837888.XU CN201420837888U CN204360775U CN 204360775 U CN204360775 U CN 204360775U CN 201420837888 U CN201420837888 U CN 201420837888U CN 204360775 U CN204360775 U CN 204360775U
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- broad sense
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Abstract
The utility model provides a kind of broad sense phonon crystal acoustic hood, 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 utility model have oise insulation factor large, be convenient to the advantages such as mounting or dismounting and transport, design and manufacture cost are low, and the utility model has the effect of good vibration and noise reducing to the vibration in bandgap range.
Description
Technical field
The utility model relates to a kind of sound arrester, particularly relates 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 purpose of this utility model 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 purpose of this utility model is achieved 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.
The utility model 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 beneficial effects of the utility model are: the utility model 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 utility model 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 utility model has the effect of good vibration and noise reducing to the vibration in bandgap range.The utility model one-piece construction 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 utility model structural representation upward;
Fig. 2 is broad sense phonon crystal hemispherical Shell of the present utility model 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 utility model is described in further detail.
The utility model 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.The utility model achieves the object of the significantly vibration and noise reducing within the scope of bandgap frequency on the one hand, 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 utility model comprises broad sense phonon crystal post shell 1 and is 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 utility model is connected with pedestal by the connected mode be also namely bolted, also the utility model 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 described in the utility model 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 utility model 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 utility model and broad sense phonon crystal hemispherical Shell, and the acoustic absorbant 3 evenly scribbled further can promote the sound insulation property of the utility model acoustic hood.
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 utility model.
The utility model 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 utility model to be described and unrestricted, the utility model is also not limited in above-mentioned citing.All do not depart from technical scheme and the improvement thereof of spirit and scope of the present utility model, and it all should be encompassed in right of the present utility model.
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 |
|---|---|---|---|
| CN201420837888.XU CN204360775U (en) | 2014-12-25 | 2014-12-25 | A kind of broad sense phonon crystal acoustic hood |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420837888.XU CN204360775U (en) | 2014-12-25 | 2014-12-25 | A kind of broad sense phonon crystal acoustic hood |
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| Publication Number | Publication Date |
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| CN204360775U true CN204360775U (en) | 2015-05-27 |
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| CN201420837888.XU Expired - Fee Related CN204360775U (en) | 2014-12-25 | 2014-12-25 | A kind of broad sense phonon crystal acoustic hood |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538019A (en) * | 2014-12-25 | 2015-04-22 | 哈尔滨工程大学 | Generalized photonic crystal acoustic shield |
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2014
- 2014-12-25 CN CN201420837888.XU patent/CN204360775U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104538019A (en) * | 2014-12-25 | 2015-04-22 | 哈尔滨工程大学 | Generalized photonic crystal acoustic shield |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150527 Termination date: 20201225 |
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| CF01 | Termination of patent right due to non-payment of annual fee |