CN111927831A - Silencer for treating noise of centrifugal fan - Google Patents
Silencer for treating noise of centrifugal fan Download PDFInfo
- Publication number
- CN111927831A CN111927831A CN202010690848.7A CN202010690848A CN111927831A CN 111927831 A CN111927831 A CN 111927831A CN 202010690848 A CN202010690848 A CN 202010690848A CN 111927831 A CN111927831 A CN 111927831A
- Authority
- CN
- China
- Prior art keywords
- sound absorption
- layer
- glass wool
- centrifugal
- silencer
- 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.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
- F04D29/664—Sound attenuation by means of sound absorbing material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
Abstract
The invention provides a novel silencer for a centrifugal fan, belongs to the technical field of silencers, and aims to solve the problems of small size, short effective silencing section, small silencing quantity and poor silencing effect of the silencer produced on the market at present. The novel silencer comprises a silencer body and a sound absorption sheet; a cavity between the inner wall pore plate and the shell steel plate is filled with a first centrifugal glass wool layer and a second centrifugal glass wool layer; the sound absorption sheet comprises a first layer of sound absorption glass wool and a second layer of sound absorption glass wool which are filled, middle layer sound absorption glass wool is filled between the first layer of sound absorption glass wool and the second layer of sound absorption glass wool, and through the arrangement of a first centrifugal glass wool layer and a second centrifugal glass wool layer with different volume weights in the sound absorber body, the arrangement of the first layer of sound absorption glass wool, the middle layer of sound absorption glass wool and the second layer of sound absorption glass wool in the sound absorption sheet, the sound absorption sheet is good in sound attenuation effect, the sound attenuation amount can reach 35-45dB (A), the resistance is smaller than 100Pa, and occupational noise deafness is greatly reduced.
Description
Technical Field
The invention belongs to the technical field of silencers, and particularly relates to a novel silencer for a centrifugal fan.
Background
Along with the improvement of environmental protection requirements, the requirements on environmental noise are more and more strict, the labor environment of workers and the quiet life environment of residents are improved, the existing silencer has unsatisfactory effect due to high airflow noise of the centrifugal fan, and the silencer with large silencing quantity is urgently needed to eliminate the airflow noise of the centrifugal fan.
Disclosure of Invention
The silencer aims to solve the problems that the silencer produced on the market is small in size, short in effective silencing section, small in silencing amount and poor in silencing effect. The invention provides a novel silencer for a centrifugal fan, which has a simple structure and a good silencing effect, namely a silencer for treating the noise of the centrifugal fan.
The technical scheme of the invention is as follows: a novel silencer for a centrifugal fan comprises a silencer body, wherein both ends of the silencer body are connected with a reducer pipe, and the outer side of the reducer pipe is connected with a flange; the sound absorption sheet is also included; the inner wall orifice plate center cavity inside be the sound absorption piece, the sound absorption piece cotton including the first layer sound absorption glass who fills and second floor sound absorption glass, first layer sound absorption glass cotton and second floor sound absorption glass cotton between fill intermediate level sound absorption glass cotton, the cotton bulk density of intermediate level sound absorption glass be greater than the cotton bulk density of first layer sound absorption glass, the cotton bulk density of second floor sound absorption glass, the cotton holistic outer cladding alkali-free glass silk cloth of intermediate level sound absorption glass, first layer sound absorption glass cotton, second floor sound absorption glass.
Furthermore, two ends of the sound absorption sheet adopt 60-degree angles.
Further, the total thickness of the first centrifugal glass wool layer and the second centrifugal glass wool layer is 100-200 mm.
Further, the thickness of the sound absorption sheet is 80-300 mm.
Furthermore, the volume weight of the first centrifugal glass wool layer is larger than that of the second centrifugal glass wool layer.
Further, the thickness of the damping layer is 3-6 mm.
Furthermore, the inner wall pore plate is a steel plate with the thickness of 1-1.5mm, and the perforation rate of the inner wall pore plate is 25%.
Furthermore, the silencer body is rectangular.
Furthermore, the two ends of the sound absorption sheet adopt 60-degree angles, the total thickness of the first centrifugal glass wool layer and the second centrifugal glass wool layer is 100-200mm, the thickness of the sound absorption sheet is 80-300mm, the volume weight of the first centrifugal glass wool layer is larger than that of the second centrifugal glass wool layer, the thickness of the damping layer is 3-6mm, the inner wall pore plate is a steel plate with the thickness of 1-1.5mm, and the perforation rate of the inner wall pore plate is 25%.
Further, the length of the sound absorption sheet is consistent with that of the silencer body.
The invention has the technical effects that:
through the setting on this internal different volume weight's of silencer first centrifugal glass cotton layer and second centrifugal glass cotton layer, the setting of first layer sound absorption glass cotton, intermediate level sound absorption glass cotton, the cotton of second layer sound absorption glass in the sound absorption piece, the noise cancelling effect is good, has greatly reduced the deaf emergence of occupational noise, has ensured the physical and mental health of worker conscientiously, prevents from the source and reduces the deaf occupational disease of occupational noise's emergence.
Drawings
FIG. 1 is a schematic structural diagram of a silencer for controlling noise of a centrifugal fan
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, a novel silencer for a centrifugal fan comprises a silencer body, wherein two ends of the silencer body are connected with a reducer pipe 1 (the inner side end is large and the outer side end is small), the other side (the outer side) of the reducer pipe 1 is connected with a flange 2, a shell steel plate 4 is arranged on the outer side of an inner wall pore plate 3 of the silencer body, a damping layer is coated on the inner wall of the shell steel plate 4, alkali-free glass fiber cloth is arranged on the inner wall pore plate 3 close to the shell steel plate 4, a cavity between the inner wall pore plate 3 and the shell steel plate 4 is filled with a first centrifugal glass wool layer 6 and a second centrifugal glass wool layer 7, the first centrifugal glass wool layer 6 is tightly attached to the damping layer, and the second centrifugal glass wool layer 7 is tightly attached to the inner wall pore plate 3; the volume weight of the first centrifugal glass wool layer 6 is larger than that of the second centrifugal glass wool layer 7.
Silencer body (inner wall orifice plate center cavity) inside be equipped with sound absorption piece 8, sound absorption piece 8 inside fill first layer sound absorption glass cotton 9 and second floor sound absorption glass cotton 10, first layer sound absorption glass cotton 9 and second floor sound absorption glass cotton 10 between fill intermediate level sound absorption glass cotton 11, the cotton bulk density of intermediate level sound absorption glass 11 be greater than the bulk density of first layer sound absorption glass cotton 9, the cotton bulk density of second floor sound absorption glass cotton 10, realize low frequency, intermediate frequency, the best noise cancelling effect of high frequency, sound absorption piece 8 inner wall on be equipped with alkali-free glass silk cloth.
The two ends of the sound absorption sheet 8 are at 60-degree angles, so that a good backflow effect can be formed, and resistance loss is reduced.
The total thickness of the first centrifugal glass wool layer 6 and the second centrifugal glass wool layer 7 is 100-200mm, and the optimal sound absorption and sound insulation effect of the inner wall layer of the silencer shell is ensured.
The sound absorption sheet 8 is in a straight shape, namely the cross section is in a straight shape.
The thickness of the sound absorption sheet 8 is 80-300 mm.
The thickness of the damping layer is 3-6 mm.
The inner wall pore plate 3 is a steel plate with the thickness of 1-1.5mm, and the perforation rate of the inner wall pore plate 3 is 25%.
The silencer body is rectangular.
The inner wall pore plate is a cylinder with a long section.
A first layer of spun glass wool and a second layer of spun glass wool.
Through the arrangement of the first centrifugal glass wool layer and the second centrifugal glass wool layer with different volume weights in the silencer body, the arrangement of the first sound absorption glass wool layer, the middle layer sound absorption glass wool layer and the second layer sound absorption glass wool layer in the sound absorption sheet, the sound attenuation effect is good, the sound attenuation amount can reach 35-45dB (A), the resistance is less than 100Pa, the occupational noise deafness is greatly reduced, the physical and mental health of workers is practically ensured, and the occupational noise deafness occupational diseases are prevented and reduced from the source.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A novel silencer for a centrifugal fan comprises a silencer body, wherein both ends of the silencer body are connected with reducer pipes, the outer sides of the reducer pipes are connected with flanges, and the novel silencer is characterized in that,
the silencer body comprises an inner wall pore plate and a shell steel plate, wherein the outer side of the inner wall pore plate is provided with the shell steel plate, the inner wall of the shell steel plate is coated with a damping layer, the side, close to the shell steel plate, of the inner wall pore plate is provided with alkali-free glass fiber cloth, a cavity between the inner wall pore plate and the shell steel plate is filled with a first centrifugal glass wool layer and a second centrifugal glass wool layer, the first centrifugal glass wool layer is tightly attached to the damping layer, and the second centrifugal glass wool layer is tightly attached to the inner wall pore plate;
the sound absorption sheet is also included;
the inner wall orifice plate center cavity inside be the sound absorption piece, the sound absorption piece cotton including the first layer sound absorption glass who fills and second floor sound absorption glass, first layer sound absorption glass cotton and second floor sound absorption glass cotton between fill intermediate level sound absorption glass cotton, the cotton bulk density of intermediate level sound absorption glass be greater than the cotton bulk density of first layer sound absorption glass, the cotton bulk density of second floor sound absorption glass, the cotton holistic outer cladding alkali-free glass silk cloth of intermediate level sound absorption glass, first layer sound absorption glass cotton, second floor sound absorption glass.
2. The novel silencer for the centrifugal fan as claimed in claim 1, wherein both ends of the sound absorbing sheet are at an angle of 60 degrees.
3. The novel silencer for the centrifugal fan as claimed in claim 1, wherein the total thickness of the first centrifugal glass wool layer and the second centrifugal glass wool layer is 100-200 mm.
4. The novel silencer for the centrifugal fan as claimed in claim 1 or 2, wherein the thickness of the sound absorbing sheet is 80-300 mm.
5. The novel silencer for the centrifugal fan according to claim 1 or 3, wherein the volume weight of the first centrifugal glass wool layer is larger than that of the second centrifugal glass wool layer.
6. The novel silencer for the centrifugal fan as claimed in claim 1, wherein the damping layer has a thickness of 3-6 mm.
7. The muffler of claim 1, wherein the inner perforated plate is a steel plate with a thickness of 1-1.5mm, and the inner perforated plate has a perforation rate of 25%.
8. The muffler of claim 1, wherein the muffler body is rectangular.
9. The novel silencer for the centrifugal fan as claimed in claim 1, wherein the two ends of the sound absorbing sheet are at an angle of 60 degrees, the total thickness of the first centrifugal glass wool layer and the second centrifugal glass wool layer is 100-200mm, the thickness of the sound absorbing sheet is 80-300mm, the volume weight of the first centrifugal glass wool layer is greater than that of the second centrifugal glass wool layer, the thickness of the damping layer is 3-6mm, the inner wall pore plate is a steel plate with the thickness of 1-1.5mm, and the perforation rate of the inner wall pore plate is 25%.
10. The muffler of claim 1 or 2, wherein the length of the sound absorbing sheet is the same as the length of the muffler body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010690848.7A CN111927831A (en) | 2020-07-17 | 2020-07-17 | Silencer for treating noise of centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010690848.7A CN111927831A (en) | 2020-07-17 | 2020-07-17 | Silencer for treating noise of centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111927831A true CN111927831A (en) | 2020-11-13 |
Family
ID=73313153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010690848.7A Pending CN111927831A (en) | 2020-07-17 | 2020-07-17 | Silencer for treating noise of centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111927831A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2067757U (en) * | 1990-02-12 | 1990-12-19 | 顾锦梅 | Double-layered resistive silencer |
| KR20030064179A (en) * | 2002-01-26 | 2003-07-31 | 주식회사 삼정기연 | A silencer of ventilator |
| CN202690540U (en) * | 2012-05-07 | 2013-01-23 | 山东省临风鼓风机有限公司 | Broadband silencer for fan |
| CN206943093U (en) * | 2017-07-12 | 2018-01-30 | 山东洁静环保设备有限公司 | A kind of centrifugal blower Special-purpose silencer |
| CN207999554U (en) * | 2017-12-27 | 2018-10-23 | 灵汇技术股份有限公司 | A kind of muffling air duct |
| CN211202430U (en) * | 2019-10-22 | 2020-08-07 | 山东洁静环保设备有限公司 | Broadband silencer for centrifugal fan |
-
2020
- 2020-07-17 CN CN202010690848.7A patent/CN111927831A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2067757U (en) * | 1990-02-12 | 1990-12-19 | 顾锦梅 | Double-layered resistive silencer |
| KR20030064179A (en) * | 2002-01-26 | 2003-07-31 | 주식회사 삼정기연 | A silencer of ventilator |
| CN202690540U (en) * | 2012-05-07 | 2013-01-23 | 山东省临风鼓风机有限公司 | Broadband silencer for fan |
| CN206943093U (en) * | 2017-07-12 | 2018-01-30 | 山东洁静环保设备有限公司 | A kind of centrifugal blower Special-purpose silencer |
| CN207999554U (en) * | 2017-12-27 | 2018-10-23 | 灵汇技术股份有限公司 | A kind of muffling air duct |
| CN211202430U (en) * | 2019-10-22 | 2020-08-07 | 山东洁静环保设备有限公司 | Broadband silencer for centrifugal fan |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106014545B (en) | A kind of engine muffler | |
| CN209354254U (en) | For the inlet and outlet ventilation denoising device in vehicular Gas Turbine Generating Units | |
| CN211202430U (en) | Broadband silencer for centrifugal fan | |
| CN211202307U (en) | Low-and-medium-frequency silencer for Roots blower | |
| CN111927831A (en) | Silencer for treating noise of centrifugal fan | |
| CN107610688A (en) | A kind of compound sound insulating structure of lumen | |
| CN207394890U (en) | A kind of chimney muffler | |
| CN110428800A (en) | A kind of pre- insulation impedance composite muffler | |
| CN211879010U (en) | Novel silencer | |
| CN210830985U (en) | Rectangular array silencer for ventilation pipeline | |
| CN204270651U (en) | A kind of high-temperature high-speed airflow fountain wet method diffusing muffler | |
| CN213016683U (en) | Heat recovery multi-connected air conditioning unit compressor noise reduction device | |
| CN210378465U (en) | Novel sound absorption and insulation material | |
| CN210602202U (en) | Silencer | |
| CN203242331U (en) | Low-noise boiler chimney | |
| CN207080419U (en) | A kind of muffler of jet blower | |
| CN213366128U (en) | Noise elimination equipment for noise reduction based on acoustic energy attenuation principle | |
| CN205977322U (en) | Novel multifrequency car silencer | |
| CN111927781A (en) | Low-frequency and medium-frequency noise elimination for Roots blower | |
| CN207458570U (en) | Foamed aluminium sound-absorbing piece and chip muffler assembly | |
| CN217871152U (en) | Building energy-saving wall | |
| CN214579655U (en) | Formaldehyde-free tubular silencer | |
| CN213904930U (en) | Modular metal resonance silencing elbow | |
| CN218159613U (en) | Ventilation resistance sheet type silencer | |
| CN201730657U (en) | Environment-friendly purification muffler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201113 |
|
| RJ01 | Rejection of invention patent application after publication |