CN205117830U - Doublestage ventilation blower silencer - Google Patents
Doublestage ventilation blower silencer Download PDFInfo
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- CN205117830U CN205117830U CN201520853513.7U CN201520853513U CN205117830U CN 205117830 U CN205117830 U CN 205117830U CN 201520853513 U CN201520853513 U CN 201520853513U CN 205117830 U CN205117830 U CN 205117830U
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- polylith
- anechoic sheet
- anechoic
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Abstract
The utility model discloses a doublestage ventilation blower silencer, including hollow casing and the polylith anechoic sheet of setting in this casing inside, the left surface and the right flank of each anechoic sheet are continuous with the inner wall of casing respectively, its characteristics lie in that the polylith anechoic sheet includes the thick anechoic sheet of polylith that the thin anechoic sheet of polylith is equal with thickness that thickness equals, the both ends that the anechoic sheet is located the casing are respectively favored with the polylith to the thin anechoic sheet of polylith, and the thin anechoic sheet of this polylith has the interval with the thick anechoic sheet of this polylith at the axial direction with respect to each other of casing, the thin anechoic sheet of polylith is the closely spaced interval between adjacent two thick anechoic sheets from last such intervals extremely down, between two adjacent thin anechoic sheets with the thick anechoic sheet of polylith. The utility model has the characteristics of simple structure, noise elimination gauge height, noise elimination volume are even etc.
Description
Technical field
The utility model relates to a kind of ventilator silencer for environment-friendly engineering.
Background technique
Along with the develop rapidly of China's economic undertakings, a large amount of industry, civilianly constantly to build with public building, ventilation and air conditioning engineering is increasing, also more and more higher to the requirement of indoor and outdoor acoustic environment, and ventilator is one of main noise pollution sources of urban environment.According to statistics, in the tip-offs about environmental issues of the masses to noise pollution, air-blower noise pollution accounts for over half.Equally, along with the development of Environmental Protection Cause, the air-blower noise of industrial enterprise is polluted and is also paid attention to widely.Therefore, effectively controlling air-blower noise is a very important task.
" on ship noise level rule " enforcement in 1 day July in 2014 of International Maritime Organization (IMO) newly revision, this specification will become mandatory specification, it is revised noise level limit value, accommodation and the medical area noise level limit of the above boats and ships of 10000 gross ton are lowered to 55dB from 60dB, the noise level limit in the region such as dining room, amusement is lowered to 60dB from 65dB, and the noise level limit of other working areas is lowered to 85dB from 90dB.When the vibration noise of active force equipment is effectively controlled, the contribution of air-blower noise to cabin noise seems particularly outstanding, therefore, needs to take effective control measure to air-blower noise.
Ventilator silencer is conventional and effective air-blower noise control apparatus, is all widely used in ship's space Noise measarement and municipal engineering noise abatement project.Wind Volume ventilator silencer conventional is at present single-stage strip-type silencer, and its concrete structure as depicted in figs. 1 and 2.This silencing apparatus comprises housing 91 and is arranged on the polylith anechoic sheet 92 of housing 91 inside, and polylith anechoic sheet 92 is spaced from top to bottom, and the left surface of each anechoic sheet 92 is connected with the inwall of housing 1 respectively with right flank.The thickness of all anechoic sheets 92 is all equal (being such as 100mm), and the spacing between adjacent every two pieces of anechoic sheets also all equal (such as spacing is 100mm).This silencing apparatus generally can only improve sound deadening capacity by the method increasing silencing apparatus length, usually there will be the high frequency sound deadening capacity noise elimination problem of non-uniform that medium and low frequency sound deadening capacity still cannot meet the demands far beyond requiring.
Summary of the invention
Technical problem to be solved in the utility model is to provide that a kind of structure is simple, sound deadening capacity is high, the uniform ventilator silencer of sound deadening capacity.
For solving the problems of the technologies described above, the technological scheme that the utility model is taked is:
Twin-stage ventilator silencer, the housing comprising hollow and the polylith anechoic sheet being arranged on this enclosure interior; The left surface of each anechoic sheet is connected with the inwall of housing respectively with right flank; Its feature is, polylith anechoic sheet comprises the thin anechoic sheet of the equal polylith of the thickness polylith thick anechoic sheet equal with thickness; The thin anechoic sheet of polylith and the thick anechoic sheet of polylith lay respectively at the two ends of housing, and the thin anechoic sheet of this polylith and the thick anechoic sheet of this polylith relative to each other have interval at the axial direction of housing; The thin anechoic sheet of polylith and the thick anechoic sheet of polylith are and arrange at equal intervals from top to bottom, and the spacing between adjacent two pieces of thin anechoic sheets is less than the spacing between adjacent two pieces of thick anechoic sheets.
Ventilator silencer of the present utility model is provided with the anechoic sheet of different-thickness, and make the sheet spacing of thin anechoic sheet also be less than the sheet spacing of thick anechoic sheet, and then the sound can eliminated in more broad frequency range, improve sound deadening capacity, and more uniform soundproof effect can be obtained.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of existing ventilator silencer.
Fig. 2 is the schematic side view of existing ventilator silencer.
Fig. 3 is the cross-sectional view of the twin-stage ventilator silencer according to the utility model one embodiment.
Fig. 4 looks schematic diagram according to a left side for the twin-stage ventilator silencer of the utility model one embodiment.
Fig. 5 looks schematic diagram according to the right side of the twin-stage ventilator silencer of the utility model one embodiment.
Fig. 6 is the cross-sectional view of the anechoic sheet according to the utility model one embodiment.
Fig. 7 is the close-up schematic view of the P part of Fig. 6.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail.
Refer to Fig. 3 to Fig. 5.Comprise the housing 1 of hollow according to the twin-stage ventilator silencer of the utility model one embodiment and be arranged on the polylith anechoic sheet of housing 1 inside; The left surface of each anechoic sheet is connected with the inwall of housing 1 respectively with right flank.Wherein, above-mentioned polylith anechoic sheet comprises the thin anechoic sheet of the equal polylith of the thickness 3 polylith thick anechoic sheet 5 equal with thickness.
The thin anechoic sheet of polylith 3 and the thick anechoic sheet 5 of polylith lay respectively at the two ends of housing 1, and the thin anechoic sheet of polylith 3 and the thick anechoic sheet 5 of polylith relative to each other have interval along the axial direction of housing 1.The thin anechoic sheet of polylith and the thick anechoic sheet of polylith are and arrange at equal intervals from top to bottom, and the spacing between adjacent two pieces of thin anechoic sheets is less than the spacing between adjacent two pieces of thick anechoic sheets.
The thin anechoic sheet 3 of above-mentioned polylith forms high frequency muffler section, is mainly used in the high-frequency noise eliminating ventilator; The thick anechoic sheet 5 of above-mentioned polylith forms medium and low frequency muffler section, is mainly used in the Middle and low frequency noise eliminating ventilator; Region between the thin anechoic sheet of above-mentioned polylith 3 and the thick anechoic sheet 5 of polylith forms transition muffler section.For reducing the pressure loss of this ventilator silencer, the thin anechoic sheet of polylith 3 and the thick anechoic sheet 5 of polylith should be more than or equal to 100mm at the span (i.e. the length L2 of transition muffler section) of housing axial direction.Transition muffler section is equivalent to an anti-formula silencing apparatus of expansion chamber, and the length of this transition muffler section of choose reasonable can eliminate the noise of a certain special frequency channel, and sound deadening capacity is at about 3dB.
In the present embodiment, the shape of cross section of housing 1 is rectangle.Flange 11 is respectively equipped with, in order to connect the pipeline at silencing apparatus two ends at the two ends of housing 1.
Fig. 6 and Fig. 7 shows the structure of the anechoic sheet according to the utility model one embodiment.Anechoic sheet structure shown in Fig. 6 and Fig. 7 is applicable to thin anechoic sheet 3 and thick anechoic sheet 5 simultaneously, and that is, in the present embodiment, the structure of thin anechoic sheet 3 and thick anechoic sheet 5 is identical, and difference is only that thickness is different.As shown in Figure 6 and Figure 7, anechoic sheet comprises shell 71 and filling sound-absorbing material 72 in the enclosure.Shell 71 comprises the cylindrical shell 711 of hollow and covers at two air guide sleeves 712 at cylindrical shell 711 two ends respectively; The sidewall of cylindrical shell 711 is provided with multiple through hole 713.Air guide sleeve 712 effectively can reduce the pressure loss of ventilator silencer.In the embodiment shown in Fig. 6 and Fig. 7, the shape of cross section of cylindrical shell 711 is rectangle; The longitudinal cross-section shape of air guide sleeve 712 is isosceles triangle.The shape of air guide sleeve 712 also can be set to arc surface, although the antihypertensive effect of arc surface air guide sleeve is better, manufacture cost also can be higher.
In a concrete application example, according to the length L1(of the thin anechoic sheet 3 of the twin-stage ventilator silencer of the utility model one embodiment and the length of high frequency muffler section) be 1250mm, the thickness of thin anechoic sheet 3 is 100mm, and the spacing between adjacent every two pieces of thin anechoic sheets 3 is 150mm.The length L3(of thick anechoic sheet 5 and the length of medium and low frequency muffler section) be 1250mm, the thickness of thick anechoic sheet 5 is 200mm, and the spacing between adjacent every two pieces of thick anechoic sheets 5 is 300mm.The length L2 of transition muffler section is 250mm.The length L4(of common single-stage ventilator silencer refers to Fig. 1) be 2500mm, the thickness of the anechoic sheet of employing is 200mm, and the spacing between adjacent every two pieces of anechoic sheets is 300mm.This twin-stage ventilator silencer and common single-stage ventilator silencer are placed on silencing apparatus test-bed and carry out acoustical behavior and airperformance test, result shows: twin-stage ventilator silencer improves 3-14dB than single-stage ventilator silencer at the frequency range sound deadening capacity of more than 500Hz, and frictional-loss coefficient then brings up to 1.49 of twin-stage ventilator silencer from 0.97 of unit ventilator silencer.
The concrete structure parameter of the twin-stage ventilator silencer described in the preceding paragraph content is only for example, and unrestricted.Because different air-blower noise spectral characteristics is not identical, when determining the concrete structure parameter of twin-stage ventilator silencer yet, targeted design must be carried out as the case may be, so just can reach the performance of expection.
More than describing is further illustrating of doing the utility model in conjunction with embodiment and accompanying drawing.But; the utility model obviously can be implemented with multiple this other method described that is different from; those skilled in the art can when carrying out promoting, deducing without prejudice to when the utility model content according to actual service condition; therefore, the content of above-mentioned specific embodiment should not limit the protection domain that the utility model is determined.
Claims (6)
1. twin-stage ventilator silencer, the housing comprising hollow and the polylith anechoic sheet being arranged on this enclosure interior; The left surface of each described anechoic sheet is connected with the inwall of described housing respectively with right flank; It is characterized in that, described polylith anechoic sheet comprises the thin anechoic sheet of the equal polylith of the thickness polylith thick anechoic sheet equal with thickness;
The thin anechoic sheet of described polylith and the thick anechoic sheet of described polylith lay respectively at the two ends of described housing, and the thin anechoic sheet of this polylith and the thick anechoic sheet of this polylith relative to each other have interval at the axial direction of housing; The thin anechoic sheet of described polylith and the thick anechoic sheet of described polylith are and arrange at equal intervals from top to bottom, and the spacing between adjacent two pieces of thin anechoic sheets is less than the spacing between adjacent two pieces of thick anechoic sheets.
2. twin-stage ventilator silencer according to claim 1, is characterized in that, the shape of cross section of described housing is rectangle.
3. twin-stage ventilator silencer according to claim 1, is characterized in that, the two ends of described housing are respectively equipped with flange.
4. twin-stage ventilator silencer according to claim 1, is characterized in that, each described anechoic sheet comprises shell and is filled in the sound-absorbing material in described shell;
Described shell comprises the cylindrical shell of hollow and covers at two air guide sleeves at described cylindrical shell two ends respectively; The sidewall of described cylindrical shell is provided with multiple through hole.
5. twin-stage ventilator silencer according to claim 4, is characterized in that, the shape of cross section of described cylindrical shell is rectangle; The longitudinal cross-section shape of described air guide sleeve is isosceles triangle.
6. twin-stage ventilator silencer according to claim 1, is characterized in that, the thin anechoic sheet of described polylith and the thick anechoic sheet of described polylith are more than or equal to 100mm at the span of housing axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520853513.7U CN205117830U (en) | 2015-10-30 | 2015-10-30 | Doublestage ventilation blower silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520853513.7U CN205117830U (en) | 2015-10-30 | 2015-10-30 | Doublestage ventilation blower silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205117830U true CN205117830U (en) | 2016-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520853513.7U Active CN205117830U (en) | 2015-10-30 | 2015-10-30 | Doublestage ventilation blower silencer |
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| CN (1) | CN205117830U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677697A (en) * | 2020-05-06 | 2020-09-18 | 徐州徐工环境技术有限公司 | Motor sweeper fan silencing device |
-
2015
- 2015-10-30 CN CN201520853513.7U patent/CN205117830U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677697A (en) * | 2020-05-06 | 2020-09-18 | 徐州徐工环境技术有限公司 | Motor sweeper fan silencing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170123 Address after: 201108 Shanghai city Minhang District Huaning Road No. 3111 building 4 Patentee after: SHANGHAI QIYAO SYSTEM ENGINEERING CO., LTD. Address before: 201108 Shanghai city Minhang District Huaning Road No. 3111 Patentee before: No.711 Inst., Chinese Ship Heavy-Industry Group Corp. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201126 Address after: 201108 Shanghai city Minhang District Huaning Road No. 3111 Building 1 room 629 Patentee after: SHANGHAI QIYAO HEAVY INDUSTRY Co.,Ltd. Address before: 201108 Shanghai city Minhang District Huaning Road No. 3111 building 4 Patentee before: SHANGHAI QIYAO SYSTEM ENGINEERING Co.,Ltd. |