CN203856727U - Soundproof hood ceiling - Google Patents
Soundproof hood ceiling Download PDFInfo
- Publication number
- CN203856727U CN203856727U CN201420265905.7U CN201420265905U CN203856727U CN 203856727 U CN203856727 U CN 203856727U CN 201420265905 U CN201420265905 U CN 201420265905U CN 203856727 U CN203856727 U CN 203856727U
- Authority
- CN
- China
- Prior art keywords
- sound
- ceiling
- material layer
- soundproof hood
- ceiling body
- 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 - Fee Related
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model relates to a silencing device and particularly relates to a soundproof hood ceiling for sound proofing of a Roots fan. The soundproof hood ceiling for sound proofing of the Roots fan comprises a ceiling body, wherein a sound absorption material layer is arranged in the middle of the ceiling body; a damping layer is arranged on one side of the sound absorption material layer; a steel plate is arranged on the damping layer; a glass fiber cloth is arranged on the other side of the sound absorption material layer; a through hole plate is fixed on the glass fiber cloth; framework beams are arranged at two ends of the ceiling body; the steel plate and the through hole plate are connected with the framework beam through core pulling rivets. The soundproof hood ceiling is solid, durable, simple, stable in performance, convenient to install, good in stability and air exchange performance, and has good high, medium and low frequency sound elimination and proofing performance; the heat generated by the operation of a fan motor and a transmission gear in the soundproof hood of the Roots fan can be effectively controlled.
Description
Technical field
The utility model relates to silencer, especially a kind of ceiling of the acoustic hood for roots blower sound insulation.
Background technique
Roots blower is positive displacement blower fan, air quantity and the revolution carried are proportional, person remains small gap between trilobal cross impeller end face and blower fan front and rear cover and between draught fan impeller, is transported to a side of discharge in the drive leeward of synchromesh gear from air inlet along inner walls.Product purpose is extensive, spread all over the numerous areas such as petrochemical industry, building materials, electric power, smelting, chemical fertilizer, mine, harbour, light textile, food, papermaking, aquaculture and sewage treatment, environmental protection industry, mostly, for delivery of air, also can be used to carry inflammable, the explosive and corrosive gass such as coal gas, hydrogen, acetylene, carbon dioxide.
Roots blower sound-insulating cover is to solve the Aerodynamic Noise of A (being pneumatic noise) of air that roots blower produces and the sound-deadening and noise-reducing equipment of eddy current crack two-part main noise.In the design of roots blower sound-insulating cover, Aerodynamic Noise of A is by driving gear noise, and noise of motor and pressure regulator valve noise are waited until part, and air power noise intensity is the highest, has the greatest impact.Eddy current crack, the pressure pulsation that comprises draught fan impeller when rotation periodically outwards exhaust becomes to cause and the periodicity exhaust sound that produces, and the noise that causes while dividing on draught fan impeller interface of air whirl.
Model utility content
The technical problems to be solved in the utility model is: based on the problems referred to above, provide a kind of acoustic hood ceiling for roots blower sound insulation.
The utility model solves the technological scheme that its technical problem adopts: a kind of acoustic hood ceiling, for the sound insulation of roots blower, comprise ceiling body, the centre of described ceiling body is provided with sound-absorbing material layer, one side of sound-absorbing material layer is provided with damping layer, damping layer is provided with steel plate, and the opposite side of sound-absorbing material layer is provided with glass fiber cloth, is fixed with perforated plate on glass fiber cloth; The two ends of described ceiling body are provided with framework beam, and above-mentioned steel plate is connected with framework beam by self-plugging rivet with perforated plate.
Further, on described ceiling body, offer noise reduction shutter opening.Blinds noise-elimination window is the remodeling of the very short chip of a kind of length (0.2～0.6m) or folded plate type silencing apparatus, permission air-flow passes through, eliminate the window formula structure of noise, because the material of structure all adopts fine aluminum alloy, its length (or claiming thickness) is very little, there are certain soundproof effect and gas-flow resistance again little, can unite two into one with vent window, and can be assembled into large-scale blind integrated.
Further, the unit weight >=15kg/m^3 of described sound-absorbing material layer.In sound absorption theory, determine the sound absorption characteristics of material with flow resistance, porosity ratio, structure factor, and in practical application, normally reflect its configuration state and determine its sound absorption characteristics with material thickness, unit weight (weight per volume).Because material flow resistance and unit weight often exist corresponding relation, therefore in engineering application often the unit weight by adjusting material to control the flow resistance of material.
Further, the material of described damping layer is asphalt cement.
The beneficial effects of the utility model are: the utility model is sturdy and durable, stable performance, there is good high, medium and low frequency noise elimination, sound insulation property, equipment is easy for installation, simple, good stability, scavenging performance is good, can effectively control the heat that roots blower acoustic hood inner blower motor and driving gear running produce.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the utility model plane structure schematic diagram.
In figure: 1. ceiling body, 2. sound-absorbing material layer, 3. damping layer, 4. steel plate, 5. glass fiber cloth, 6. perforated plate, 7. framework beam, 8. self-plugging rivet, 9. noise reduction shutter opening.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, and basic structure of the present utility model is only described in a schematic way, and therefore it only shows the formation relevant with the utility model.
As shown in Fig. 1～2, a kind of acoustic hood ceiling, for the sound insulation of roots blower, comprise ceiling body 1, the centre of ceiling body 1 is provided with sound-absorbing material layer 2, and a side of sound-absorbing material layer 2 is provided with damping layer 3, and damping layer 3 is provided with steel plate 4, the opposite side of sound-absorbing material layer 2 is provided with glass fiber cloth 5, is fixed with perforated plate 6 on glass fiber cloth 5; The two ends of ceiling body 1 are provided with framework beam 7, and above-mentioned steel plate 4 is connected with framework beam 7 by self-plugging rivet 8 with perforated plate 6.
Further, on ceiling body 1, offer noise reduction shutter opening 9.Blinds noise-elimination window is the remodeling of the very short chip of a kind of length (0.2～0.6m) or folded plate type silencing apparatus, permission air-flow passes through, eliminate the window formula structure of noise, because the material of structure all adopts fine aluminum alloy, its length (or claiming thickness) is very little, there are certain soundproof effect and gas-flow resistance again little, can unite two into one with vent window, and can be assembled into large-scale blind integrated.
Further, the unit weight >=15kg/m^3 of sound-absorbing material layer 2.In sound absorption theory, determine the sound absorption characteristics of material with flow resistance, porosity ratio, structure factor, and in practical application, normally reflect its configuration state and determine its sound absorption characteristics with material thickness, unit weight (weight per volume).Because material flow resistance and unit weight often exist corresponding relation, therefore in engineering application often the unit weight by adjusting material to control the flow resistance of material.
Further, the material of described damping layer 3 is asphalt cement.
Taking above-mentioned foundation desirable embodiment of the present utility model as enlightenment, by above-mentioned description, relevant staff can, not departing from the scope of this model utility technological thought, carry out various change and amendment completely.The technical scope of this model utility is not limited to the content on specification, must determine its technical scope according to claim scope.
Claims (4)
1. an acoustic hood ceiling, for the sound insulation of roots blower, comprise ceiling body (1), it is characterized in that: the centre of described ceiling body (1) is provided with sound-absorbing material layer (2), one side of sound-absorbing material layer (2) is provided with damping layer (3), damping layer (3) is provided with steel plate (4), the opposite side of sound-absorbing material layer (2) is provided with glass fiber cloth (5), is fixed with perforated plate (6) on glass fiber cloth (5); The two ends of described ceiling body (1) are provided with framework beam (7), and above-mentioned steel plate (4) is connected with framework beam (7) by self-plugging rivet (8) with perforated plate (6).
2. acoustic hood ceiling according to claim 1, is characterized in that: on described ceiling body (1), offer noise reduction shutter opening (9).
3. acoustic hood ceiling according to claim 1, is characterized in that: the unit weight >=15kg/m^3 of described sound-absorbing material layer (2).
4. acoustic hood ceiling according to claim 1, is characterized in that: the material of described damping layer (3) is asphalt cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420265905.7U CN203856727U (en) | 2014-05-22 | 2014-05-22 | Soundproof hood ceiling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420265905.7U CN203856727U (en) | 2014-05-22 | 2014-05-22 | Soundproof hood ceiling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203856727U true CN203856727U (en) | 2014-10-01 |
Family
ID=51606581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420265905.7U Expired - Fee Related CN203856727U (en) | 2014-05-22 | 2014-05-22 | Soundproof hood ceiling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203856727U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747452A (en) * | 2014-07-22 | 2015-07-01 | 施周平 | Ceiling of sound insulation cover |
-
2014
- 2014-05-22 CN CN201420265905.7U patent/CN203856727U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747452A (en) * | 2014-07-22 | 2015-07-01 | 施周平 | Ceiling of sound insulation cover |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20141001 Termination date: 20150522 |
|
| EXPY | Termination of patent right or utility model |