CN2067757U - Double-layered resistive silencer - Google Patents
Double-layered resistive silencer Download PDFInfo
- Publication number
- CN2067757U CN2067757U CN 90201253 CN90201253U CN2067757U CN 2067757 U CN2067757 U CN 2067757U CN 90201253 CN90201253 CN 90201253 CN 90201253 U CN90201253 U CN 90201253U CN 2067757 U CN2067757 U CN 2067757U
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- CN
- China
- Prior art keywords
- double
- absorbing material
- glass wool
- deck
- shell
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- 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.)
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- Exhaust Silencers (AREA)
Abstract
The utility model relates to a double-layered resistive silencer comprising a shell, an internal cavity and sound absorption materials, characterized in that the shell is a rectangular shell made of wood joist frames and galvanized steel sheets, two layers of sound absorbing materials with extra fine glass wool with different volume weight are arranged along the inner wall of the shell, the two layers are comparted and fixed by a steel screen, the inner side of the two layers of the sound absorbing materials with extra fine glass wool is masked by aluminium expanded sheets and glass cloth, and middle partition boards crossing with each other are arranged in the inner cavity to form a plurality of airflow channels. The silencer has the advantages of big noise insulation volume, good aerodynamic quality, small size, no corrosion, and low cost without insulation treatment, being suitable for silencing treatment for air conditioning system.
Description
The utility model belongs to the silencing apparatus of mesolow centrifugal blower.
At present, the noise of air-conditioning system can reach more than 80 decibels (dB), and environment is caused noise pollution, therefore must adopt silencer, to reduce noise, reduces public hazards.Have the GB silencer that in engineering construction, adopts now, mainly contain chip and impedance type silencing apparatus.Strip-type silencer is to utilize the sound-absorbing material plate that be arranged in parallel to come absorption of noise; The impedance type silencing apparatus be the sudden change of tube section in utilizing and expansion chamber be used for reducing noise.The deficiency that existing silencing apparatus exists is that the useful area crossed of air communication is less, and drag losses is bigger, and it is limited that noise level reduces; And the volume of silencing apparatus is big, and it is big to take up room in machine room, brings the inconvenience of construction.
The purpose of this utility model is that a kind of volume of development and design is little, resistance is little, the effective silencing apparatus of eliminating the noise, and to reduce fan noise, minimizing takes up room, and satisfies the needs of air-conditioning system engineering construction.
The double-deck dissipative muffler of the utility model, form by shell, inner chamber and sound-absorbing material, it is characterized in that, shell is that rough ground framework and galvanized steel plain sheet are made rectangular enclosure, along inner wall of tube shell double-deck super glass wool sound-absorbing material is set, and the unit weight of outer super glass wool sound-absorbing material is big, the unit weight of internal layer super glass wool sound-absorbing material is little, separate with Mild Steel Expanded Sheets between two-layer and fixing, the inner face of double-deck super glass wool sound-absorbing material forms the inner chamber of silencing apparatus with aluminium expanded sheets and glass cloth mask.Central diaphragm in that the inner chamber setting is intersected in length and breadth is separated into several air-flow paths with inner chamber, and each air-flow path section is 150 * 150-500 * 500 millimeter; Central diaphragm is by two-layer aluminium expanded sheets and glass cloth mask, and the inner super glass wool sound-absorbing material of filling constitutes.
It is big that the double-deck dissipative muffler of the utility model has noise insulation factor, good aerodynamic quality, and air-flow regenerated noise index is low, and volume is little, does not corrode, and cost is low, need not advantages such as insulation processing.
The sound deadening capacity (dB) of double-deck dissipative muffler is compared as follows with the GB silencing apparatus:
Frequency 63 125 250 500 1,000 2,000 4000 remarks
The long 1200mm of double-deck dissipative muffler 10 12.6 18.3 27.2 38 48 33 silencing apparatuss
The long 1200mm of GB T701-6 impedance 7 13.5 16 21 38 40 35 silencing apparatuss
Composite muffler
The aerodynamic quality and the GB silencing apparatus of double-deck dissipative muffler are compared as follows:
Wind speed (meter per second) drag losses (column)
The long 950mm of double-deck dissipative muffler 4-8 0.35-1.41 silencing apparatus
The long 3650mm of GB T701-1 strip-type silencer 4-5 6-9 silencing apparatus
Regenerated noise index test to double-deck dissipative muffler is as follows:
Wind speed (meter per second) 7.5 10.6
Regenerated noise index (dB) 38 47
When room noise requires less than 50dB, under the blower fan overbottom pressure allows, can use the wind speed of 10.6 meter per seconds, can not establish reducer pipe and link thereof, saving takes up room.
The comparison of double-deck dissipative muffler and other muffler volume:
Than (8000 cubic meters/time more than) under the heavy traffic condition, adopt the muffler flange interface of same size, the volume of the volume ratio impedance complex formula silencing apparatus of double-deck dissipative muffler is little.As muffler flange interface 700 * 500mm, double-deck dissipative muffler section is that 950 * 750mm(does not need thermal insulation layer), and impedance complex formula silencing apparatus section is that 1300 * 900mm(comprises the 50mm thermal insulation layer).
Double-deck dissipative muffler adopts the aluminium expanded sheets mask, and is in light weight, not corrosion.Inner wall of tube shell has the super glass wool sound-absorbing material, has thermal and insulating performance, and when being used for the constant temperature engineering, shell need not to establish thermal insulation layer again.
The cost of double-deck dissipative muffler and other silencing apparatus compares:
Applying working condition be air quantity 25000 cubic meters/time, in the time of temperature 18-25 ℃, relative moisture 40-60%, fan noise level 80dB, under the room noise level 55dB condition, general silencing apparatus cost 15000-20000 unit, double-deck dissipative muffler cost is less than 10000 yuan.
Below in conjunction with drawings and Examples, the utility model will be further described.
Fig. 1 is the plan view of double-deck dissipative muffler.
Fig. 2 is the 1-1 sectional drawing of double-deck dissipative muffler.
Fig. 3 is the sectional drawing that the inner chamber of double-deck dissipative muffler has 8 air-flow paths.
As seen from the figure, double-deck dissipative muffler is made up of shell, inner chamber and sound-absorbing material, and shell is the rectangular enclosure that rough ground 7 and galvanized steel plain sheet 1 are made, section 650 * 650mm, long 950mm.The outer sound-absorbing material 2 of double-deck super glass wool sound-absorbing material is the super glass wool sound-absorbing material of unit weight 55-70 kilogram/cubic meter, internal layer sound-absorbing material 4 is the super glass wool sound-absorbing material of unit weight 20-35 kilogram/cubic meter, separates between two-layer fixing with Mild Steel Expanded Sheets 3.Protection slab 5 is aluminium expanded sheets and glass cloth.Central diaphragm 6 is separated into 4 or 8 air-flow paths with inner chamber, and each air-flow path section is 150 * 150mm.Can connect and use in ventilation duct, to the processing of eliminating the noise of the air-flow of centrifugal blower.
Claims (3)
1, a kind of double-deck dissipative muffler, by shell, inner chamber and sound-absorbing material are formed, it is characterized in that, shell is that rough ground framework and galvanized steel plain sheet are made rectangular enclosure, along inner wall of tube shell double-deck super glass wool sound-absorbing material is set, the unit weight of outer super glass wool sound-absorbing material is big, the unit weight of internal layer super glass wool sound-absorbing material is little, separate with Mild Steel Expanded Sheets between two-layer and fixing, the inner face of double-deck super glass wool sound-absorbing material aluminium expanded sheets and glass cloth mask, form the inner chamber of silencing apparatus, at the crossing in length and breadth central diaphragm of inner chamber setting, inner chamber is separated into several air-flow paths, and central diaphragm is by two-layer aluminium expanded sheets and glass cloth mask, and the inner super glass wool sound-absorbing material of filling constitutes.
2, double-deck dissipative muffler as claimed in claim 1, the unit weight that it is characterized in that outer super glass wool sound-absorbing material is 55-70 kilogram/cubic meter, the unit weight of internal layer super glass wool sound-absorbing material is 20-35 kilogram/cubic meter.
3, double-deck dissipative muffler as claimed in claim 1 is characterized in that be 150 * 150-500 * 500mm by central diaphragm with each cross-section size of air-flow path that inner chamber is separated into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90201253 CN2067757U (en) | 1990-02-12 | 1990-02-12 | Double-layered resistive silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90201253 CN2067757U (en) | 1990-02-12 | 1990-02-12 | Double-layered resistive silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2067757U true CN2067757U (en) | 1990-12-19 |
Family
ID=4882911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90201253 Withdrawn CN2067757U (en) | 1990-02-12 | 1990-02-12 | Double-layered resistive silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2067757U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298925A (en) * | 2011-09-08 | 2011-12-28 | 周国柱 | Composite sound-absorbing structure |
| CN104863003A (en) * | 2014-02-21 | 2015-08-26 | 精工爱普生株式会社 | Sheet manufacturing apparatus |
| CN105952687A (en) * | 2016-03-17 | 2016-09-21 | 潘泉方 | Fan silencer |
| CN109199218A (en) * | 2018-09-28 | 2019-01-15 | 江苏美的清洁电器股份有限公司 | Cleaning equipment and silencing means for cleaning equipment |
| CN111927831A (en) * | 2020-07-17 | 2020-11-13 | 北方华锦化学工业股份有限公司 | Silencer for treating noise of centrifugal fan |
-
1990
- 1990-02-12 CN CN 90201253 patent/CN2067757U/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102298925A (en) * | 2011-09-08 | 2011-12-28 | 周国柱 | Composite sound-absorbing structure |
| CN104863003A (en) * | 2014-02-21 | 2015-08-26 | 精工爱普生株式会社 | Sheet manufacturing apparatus |
| JP2015155585A (en) * | 2014-02-21 | 2015-08-27 | セイコーエプソン株式会社 | Sheet production apparatus |
| CN105952687A (en) * | 2016-03-17 | 2016-09-21 | 潘泉方 | Fan silencer |
| CN109199218A (en) * | 2018-09-28 | 2019-01-15 | 江苏美的清洁电器股份有限公司 | Cleaning equipment and silencing means for cleaning equipment |
| CN111927831A (en) * | 2020-07-17 | 2020-11-13 | 北方华锦化学工业股份有限公司 | Silencer for treating noise of centrifugal fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |