CN211202307U - Low-and-medium-frequency silencer for Roots blower - Google Patents
Low-and-medium-frequency silencer for Roots blower Download PDFInfo
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- CN211202307U CN211202307U CN201921813935.6U CN201921813935U CN211202307U CN 211202307 U CN211202307 U CN 211202307U CN 201921813935 U CN201921813935 U CN 201921813935U CN 211202307 U CN211202307 U CN 211202307U
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Abstract
The utility model relates to a roots's fan silencer, in particular to roots's fan is with well low frequency silencer, including the silencer casing, the reducer pipe is connected at the both ends of silencer casing, the opposite side flange of reducer pipe, silencer shells inner wall one side is equipped with the perforated steel sheet, it is cotton to fill low unit weight centrifugal glass between perforated steel sheet and the silencer casing in proper order, well unit weight centrifugal glass is cotton and high unit weight centrifugal glass is cotton, low unit weight centrifugal glass is cotton to be equipped with alkali-free glass silk cloth between the perforated steel sheet, scribble the damping layer on the silencer shells inner wall, silencer casing is inside to insert the sound absorption piece, it is cotton to fill low unit weight sound absorption in proper order in the sound absorption piece, high unit weight sound absorption cotton and well unit weight sound absorption cotton, low unit weight sound absorption cotton, well unit weight sound absorption cotton and high unit weight sound absorption cotton pass through alkali-free glass. The utility model has the advantages that: the noise elimination amount can reach more than 40dB (A), the resistance is less than 100Pa, and the noise is effectively reduced.
Description
Technical Field
The utility model relates to a roots's fan silencer, in particular to roots's fan is with well low frequency silencer.
Background
As the Roots blower has wide application, low-frequency noise in the air inlet and the air outlet is large, generally between 100 and 110dB (A), the propagation distance is long, and the influence on environmental noise is large. The silencer produced by common silencer manufacturers has small volume, short effective silencing section, small silencing quantity and poor medium and low frequency silencing effect.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides a simple structure, roots is well low frequency silencer for fan of noise elimination.
The technical scheme of the utility model as follows:
a middle-low frequency silencer for a Roots blower comprises a silencer shell, wherein two ends of the silencer shell are connected with a reducer, the other side of the reducer is connected with a flange, one side of the inner wall of the silencer shell is provided with a perforated steel plate, low-volume-weight centrifugal glass wool, medium-volume-weight centrifugal glass wool and high-volume-weight centrifugal glass wool are sequentially filled between the perforated steel plate and the silencer shell, alkali-free glass silk cloth is arranged between the low-volume-weight centrifugal glass wool and the perforated steel plate, the inner wall of the silencer shell is coated with a damping layer of 4-6mm, a sound absorption sheet is inserted into the silencer shell, the low-volume-weight sound absorption wool, the high-volume-weight sound absorption wool and the medium-volume-weight sound absorption wool are sequentially filled in the sound absorption sheet, the low-volume-weight sound absorption wool, the medium-volume-weight sound absorption wool and the high-volume-weight sound absorption wool are integrally coated by the alkali-free glass silk cloth, two, and the resistance loss is reduced.
The volume weight of the high volume weight centrifugal glass wool is more than 48Kg/m3And the thickness of the high volume weight centrifugal glass wool is 50 mm.
The vertex angle of the diversion cone is 60 degrees.
The volume weight of the sound absorption cotton with high volume weight is more than 48Kg/m3。
The perforation rate of the perforated steel plate is more than 25%, the aperture is 5mm, and the perforated steel plate is arranged in a regular triangle.
The silencer shell is circular.
The thickness of the sound absorption sheet is 150 mm.
The utility model provides a beneficial effect that technical scheme brought is:
the low, medium and high volume weight centrifugal glass wool is filled on the shell, the low, medium and high volume weight sound absorption wool is filled in the sound absorption sheet, the silencer mainly takes the medium and low frequency noise elimination quantity, the noise elimination quantity can reach more than 40dB (A), the resistance is less than 100Pa, and the noise is effectively reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, the medium and low frequency silencer for the roots blower comprises a silencer shell 1, wherein two ends of the silencer shell 1 are connected with a reducer pipe 2, the other side of the reducer pipe 2 is connected with a flange 3, one side of the inner wall of the silencer shell 1 is provided with a perforated steel plate 4, a low volume weight centrifugal glass wool 5, a medium volume weight centrifugal glass wool 6 and a high volume weight centrifugal glass wool 7 are sequentially filled between the perforated steel plate 4 and the silencer shell 1, the low volume weight centrifugal glass wool 5 is provided with an alkali-free glass fiber cloth between the perforated steel plates 4, the inner wall of the silencer shell 1 is coated with a damping layer of 4-6mm, a sound absorption sheet 8 is inserted into the silencer shell 1, the sound absorption sheet 8 is sequentially filled with a low volume weight sound absorption wool 9, a high volume weight sound absorption wool 10 and a medium volume weight sound absorption wool 11, the low volume weight sound absorption wool 9, the medium volume weight sound absorption wool 10 and the high volume weight sound absorption wool 11 are coated by the alkali-free glass fiber cloth as a whole, and the two ends of the sound absorption sheet 8 are provided with guide cones 12, so that the resistance loss is reduced.
The volume weight of the high volume weight centrifugal glass wool 7 is more than 48Kg/m3And the thickness of the high volume weight centrifugal glass wool 7 is 50 mm.
The vertex angle of the guide cone 12 is 60 degrees.
The volume weight of the sound absorption cotton 10 with high volume weight is more than 48Kg/m3。
The perforation rate of the perforated steel plate 4 is more than 25%, the aperture is 5mm, and the perforated steel plate 4 is arranged in a regular triangle.
The silencer shell 1 is circular.
The thickness of the sound absorption sheet 8 is 150 mm.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (7)
1. A middle-low frequency silencer for a Roots blower comprises a silencer shell, wherein two ends of the silencer shell are connected with a reducer pipe, and the other side of the reducer pipe is connected with a flange, and the middle-low frequency silencer is characterized in that a perforated steel plate is arranged on one side of the inner wall of the silencer shell, low-volume-weight centrifugal glass wool, middle-volume-weight centrifugal glass wool and high-volume-weight centrifugal glass wool are sequentially filled between the perforated steel plate and the silencer shell, alkali-free glass fiber cloth is arranged between the low-volume-weight centrifugal glass wool and the perforated steel plate, a damping layer of 4-6mm is coated on the inner wall of the silencer shell, a sound absorption sheet is inserted into the silencer shell, the low-volume-weight sound absorption wool, the high-volume-weight sound absorption wool and the middle-volume-weight sound absorption wool are sequentially filled in the sound absorption sheet, and the low-volume-weight sound absorption wool, the middle-volume-weight sound absorption wool and, and the two ends of the sound absorption sheet are provided with flow guide cones, so that the resistance loss is reduced.
2. The middle and low frequency muffler for roots blower as claimed in claim 1, wherein the volume weight of the high volume weight centrifugal glass wool is more than 48Kg/m3And the thickness of the high volume weight centrifugal glass wool is 50 mm.
3. The medium and low frequency muffler for roots blower as claimed in claim 1, wherein the apex angle of the guide cone is 60 degrees.
4. The middle and low frequency muffler for roots blower as claimed in claim 1, wherein the volume weight of the sound absorption cotton with high volume weight is more than 48Kg/m3。
5. The medium and low frequency muffler for roots blower as claimed in claim 1, wherein the perforated steel plate has a perforation rate of more than 25% and a pore diameter of 5mm, and is arranged in regular triangle.
6. The medium and low frequency muffler for roots blower as claimed in claim 1, wherein the muffler housing is circular.
7. The medium and low frequency muffler for roots blower as claimed in claim 1, wherein the thickness of the sound absorbing sheet is 150 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921813935.6U CN211202307U (en) | 2019-10-22 | 2019-10-22 | Low-and-medium-frequency silencer for Roots blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921813935.6U CN211202307U (en) | 2019-10-22 | 2019-10-22 | Low-and-medium-frequency silencer for Roots blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211202307U true CN211202307U (en) | 2020-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921813935.6U Active CN211202307U (en) | 2019-10-22 | 2019-10-22 | Low-and-medium-frequency silencer for Roots blower |
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| CN (1) | CN211202307U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927781A (en) * | 2020-07-17 | 2020-11-13 | 北方华锦化学工业股份有限公司 | Low-frequency and medium-frequency noise elimination for Roots blower |
| CN114412841A (en) * | 2022-01-17 | 2022-04-29 | 山东洁静环保设备有限公司 | Blowback deashing formula dust exhausting fan composite muffler |
-
2019
- 2019-10-22 CN CN201921813935.6U patent/CN211202307U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111927781A (en) * | 2020-07-17 | 2020-11-13 | 北方华锦化学工业股份有限公司 | Low-frequency and medium-frequency noise elimination for Roots blower |
| CN114412841A (en) * | 2022-01-17 | 2022-04-29 | 山东洁静环保设备有限公司 | Blowback deashing formula dust exhausting fan composite muffler |
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