CN108007231A - A kind of air outlet micropore plate muffler for crossflow cooling tower - Google Patents
A kind of air outlet micropore plate muffler for crossflow cooling tower Download PDFInfo
- Publication number
- CN108007231A CN108007231A CN201711391392.9A CN201711391392A CN108007231A CN 108007231 A CN108007231 A CN 108007231A CN 201711391392 A CN201711391392 A CN 201711391392A CN 108007231 A CN108007231 A CN 108007231A
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- China
- Prior art keywords
- plate
- frequency
- cooling tower
- air outlet
- perforated plate
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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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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
- F28C1/10—Arrangements for suppressing noise
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The present invention provides a kind of air outlet micropore plate muffler for crossflow cooling tower, including：Hollow center and cross part, for absorbing the low frequency noise of 80 250HZ, its lower wall is made of low frequency perforated plate, and the low frequency perforation back is air cavity；Hollow outer perimeter section, for absorbing the high frequency noise of 250 1250HZ, its inner wall is made of high frequency perforated plate, and the high frequency perforation back is air cavity.The present invention is compared to the prior art, and the muffler structure is simple, and center and cross part mainly absorb low frequency noise, and outer perimeter section mainly absorbs high frequency noise, and the noise of cooling tower is effectively greatly reduced；The muffler does not include inflammable constituent, does not damage to environment yet.
Description
Technical field
The present invention relates to cooling tower technical field, is specifically a kind of air outlet microwell plate noise reduction for crossflow cooling tower
Device.
Background technology
Cooling tower is by the use of water as circulating coolant, heat dissipation is absorbed from a system into air, to reduce water temperature
Device；Water carries out cold and hot exchange and produces steam after being contacted with air flow, steam volatilization takes away heat and reaches evaporative heat loss.For
Hot-air discharged in time, cooling fan can be generally installed at the top of cooling tower.In cooling tower operational process, fan and motor
Produce a large amount of noises.When installing cooling tower in the area to noise-sensitive, noise specification becomes one of cooling tower overall performance
Important indicator.Currently used noise reduction mode has two kinds, and one kind is that certain area concentration does soundproof wall outside tower, is occupied a large amount of
Space；Another kind is to add noise reduction annex in itself to tower, including the muffler of air inlet and air outlet, and muffler more uses at present
For the hollow material such as glass fibre or rock wool as filler, these fillers itself are inflammable, and have harm to environment.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the object of the present invention is to provide a kind of going out for crossflow cooling tower
Air port micropore plate muffler.
To reach above-mentioned purpose, the technical solution adopted by the present invention to solve the technical problems is：One kind is used to flow over cold
But the air outlet micropore plate muffler of tower, including：Hollow center and cross part, the low frequency for absorbing 80-250HZ are made an uproar
Sound, its lower wall are made of low frequency perforated plate, and the low frequency perforation back is air cavity；Hollow outer perimeter section, for inhaling
The high frequency noise of 250-1250HZ is received, its inner wall is made of high frequency perforated plate, and the high frequency perforation back is air cavity.
The present invention is compared to the prior art, and the muffler structure is simple, and center and cross part mainly absorb low frequency noise,
Outer perimeter section mainly absorbs high frequency noise, and the noise of cooling tower is effectively greatly reduced；The muffler does not include inflammable constituent, right
Environment does not also damage.
Further, the resonant frequency of the low frequency perforated plate is 120HZ.
Further, the thickness of slab of the low frequency perforated plate is 1-2mm, piercing aperture 0.5-1mm, punching rate 0.5-
1.5%, cavity depth is 300-600mm after plate.
Using the above preferred scheme, the acoustic absorptivity between frequency 80-250HZ is more than 0.45, to low frequency noise
Play good absorption.
Further, the thickness of slab of the low frequency perforated plate is 1.5mm, piercing aperture 0.75mm, punching rate 1%, plate
Cavity depth is 476mm afterwards.
Using the above preferred scheme, the acoustic absorptivity at resonant frequency 120HZ be 0.9, frequency 57-252HZ it
Between acoustic absorptivity still more than 0.45, have good sound absorption characteristics to low-frequency range.
Further, the resonant frequency of the high frequency perforated plate is 555HZ.
Further, the thickness of slab of the high frequency perforated plate is 1-2mm, piercing aperture 0.4-0.8mm, punching rate 1.5-
2.5%, cavity depth is 55-80mm after plate.
Using the above preferred scheme, the acoustic absorptivity between frequency 250-1250HZ makes an uproar high frequency more than 0.47
Sound plays good absorption.
Further, the thickness of slab of the high frequency perforated plate is 1.5mm, piercing aperture 0.5mm, punching rate 2%, after plate
Cavity depth is 69mm.
Using the above preferred scheme, the acoustic absorptivity at resonant frequency 555HZ is 0.95, in frequency 256-1202HZ
Between acoustic absorptivity still more than 0.47, have good sound absorption characteristics to high band.
Further, the outer perimeter section shape is octagon.
Using the above preferred scheme, easy to manufacture, convenient installation, stable structure.
Further, the low frequency perforated plate, high frequency perforated plate are aluminium sheet or galvanized sheet.
Using the above preferred scheme, high-precision hole dimension can be produced, improves the effect that abates the noise, Er Qienai
Corrosivity is strong, service life length.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structure diagram of one embodiment of the present invention；
Fig. 2 is the structure diagram of another embodiment of the present invention；
Fig. 3 is the structure diagram of another embodiment of the present invention；
Fig. 4 is noise distribution map before and after muffler installation.
Numeral and the title of the corresponding component represented by letter in figure：
1- mufflers；11- outer perimeter sections；111- low frequency perforated plates；12- centers and cross part；121- high frequency perforated plates；
2- cooling tower fans；3- cooling tower top frames.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment, belongs to the scope of protection of the invention.
As shown in Figs. 1-2, one embodiment of the present invention is：A kind of air outlet microwell plate for crossflow cooling tower disappears
Sound device 1, including：Hollow center and cross part 11, for absorbing the low frequency noise of 80-250HZ, its lower wall is perforated by low frequency
Plate 111 is formed, and 111 back side of low frequency perforated plate is air cavity；Hollow outer perimeter section 12, for absorbing the height of 250-1250HZ
Frequency noise, its inner wall are made of high frequency perforated plate 121, and 121 back side of high frequency perforated plate is air cavity.
It is using the beneficial effect of above-mentioned technical proposal：The muffler structure is simple, and center and cross part 11 are mainly inhaled
Low frequency noise is received, outer perimeter section 12 mainly absorbs high frequency noise, which does not include inflammable constituent, and environment is not also caused to endanger
Evil, is simply and effectively greatly reduced the noise of cooling tower.
In other embodiments of the present invention, the resonant frequency of low frequency perforated plate 111 is 120HZ；High frequency perforated plate
121 resonant frequency is 555HZ.It is using the beneficial effect of above-mentioned technical proposal：Make noise of the muffler 1 to 80-1250HZ
Can effectively it absorb.
As shown in Figure 2,3, in other embodiments of the present invention, the thickness of slab of low frequency perforated plate 111 is 1-2mm, is worn
Hole aperture is 0.5-1mm, punching rate 0.5-1.5%, and cavity depth D is 300-600mm after plate；The plate of high frequency perforated plate 121
Thickness is 1-2mm, piercing aperture 0.4-0.8mm, punching rate 1.5-2.5%, and cavity depth d is 55-80mm after plate.Using upper
The beneficial effect for stating technical solution is low frequency noise reduction part 11, the acoustic absorptivity between frequency 80-250HZ more than 0.45,
Good absorption is played to low frequency noise；High frequency noise reduction part 12, the acoustic absorptivity between frequency 250-1250HZ exists
More than 0.47, good absorption is played to high frequency noise.
In other embodiments of the present invention, the thickness of slab of low frequency perforated plate 111 is 1.5mm, and piercing aperture is
0.75mm, punching rate 1%, cavity depth D is 476mm after plate；The thickness of slab of high frequency perforated plate 121 is 1.5mm, and piercing aperture is
0.5mm, punching rate 2%, cavity depth d is 69mm after plate.It is using the beneficial effect of above-mentioned technical proposal：Low frequency noise elimination part
Divide 11, the acoustic absorptivity at resonant frequency 120HZ is 0.9, and the acoustic absorptivity between frequency 57-252HZ is still 0.45
More than, there are good sound absorption characteristics to low-frequency range；High frequency noise reduction part 12, the acoustic absorptivity at resonant frequency 555HZ are
0.95, the acoustic absorptivity between frequency 256-1202HZ has high band good sound absorption characteristics still more than 0.47.
It is the noise distribution map before and after cooling tower installation muffler in Fig. 4.Muffler characteristic is as follows：Low frequency perforated plate 111
Thickness of slab be 1.5mm, piercing aperture 0.75mm, punching rate 1%, cavity depth D is 476mm after plate；High frequency perforated plate 121
Thickness of slab be 1.5mm, piercing aperture 0.5mm, punching rate 2%, cavity depth d is 69mm after plate.Test equipment：Japan's reason
The NL-52 type noise-measuring instruments of sound company production.Test condition：At on the outside of cooling tower air intake surface 1.5 meters.What is obtained is each
Frequency range noise data as shown in figure 4, dotted portion is noise distribution curve before muffler installation, for muffler install by bold portion
Noise distribution curve afterwards.Conclusion：The noise peak of frequency 80-2500HZ parts has obtained effective abatement, although 4000HZ with
The noise peak of upper part increased, but less than less than 50 decibels, the noise of cooling tower is effectively eliminated.
In other embodiments of the present invention, 12 shape of outer perimeter section is octagon.Using above-mentioned technical proposal
Beneficial effect be：Easy to manufacture, convenient installation, stable structure.
In other embodiments of the present invention, low frequency perforated plate 111, high frequency perforated plate 121 are aluminium sheet or galvanized sheet.
It is using the beneficial effect of above-mentioned technical proposal：High-precision hole dimension can be produced, improves the effect that abates the noise, and
Corrosion resistance is strong, service life length.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow ordinary skill people
Member can understand present disclosure and be carried out, it is not intended to limit the scope of the present invention, it is all according to the present invention
The equivalent change or modification that Spirit Essence is made, should all cover within the scope of the present invention.
Claims (9)
- A kind of 1. air outlet micropore plate muffler for crossflow cooling tower, it is characterised in that including：Hollow center and cross part, for absorbing the low frequency noise of 80-250HZ, its lower wall is made of low frequency perforated plate, institute It is air cavity to state low frequency perforation back；Hollow outer perimeter section, for absorbing the high frequency noise of 250-1250HZ, its inner wall is made of high frequency perforated plate, the height Frequency perforation back is air cavity.
- 2. the air outlet micropore plate muffler according to claim 1 for crossflow cooling tower, it is characterised in that described low The resonant frequency of frequency perforated plate is 120HZ.
- 3. the air outlet micropore plate muffler according to claim 1 for crossflow cooling tower, it is characterised in that described low The thickness of slab of frequency perforated plate is 1-2mm, piercing aperture 0.5-1mm, punching rate 0.5-1.5%, and cavity depth is 300- after plate 600mm。
- 4. the air outlet micropore plate muffler according to claim 3 for crossflow cooling tower, it is characterised in that described low The thickness of slab of frequency perforated plate is 1.5mm, piercing aperture 0.75mm, punching rate 1%, and cavity depth is 476mm after plate.
- 5. the air outlet micropore plate muffler according to claim 1 for crossflow cooling tower, it is characterised in that the height The resonant frequency of frequency perforated plate is 555HZ.
- 6. the air outlet micropore plate muffler according to claim 1 for crossflow cooling tower, it is characterised in that the height The thickness of slab of frequency perforated plate is 1-2mm, piercing aperture 0.4-0.8mm, punching rate 1.5-2.5%, and cavity depth is 55- after plate 80mm。
- 7. the air outlet micropore plate muffler according to claim 6 for crossflow cooling tower, it is characterised in that the height The thickness of slab of frequency perforated plate is 1.5mm, piercing aperture 0.5mm, punching rate 2%, and cavity depth is 69mm after plate.
- 8. the air outlet micropore plate muffler according to claim 1 for crossflow cooling tower, it is characterised in that described outer Circle portion profile is octagon.
- 9. the air outlet micropore plate muffler according to claim 1 for crossflow cooling tower, it is characterised in that described low Frequency perforated plate, high frequency perforated plate are aluminium sheet or galvanized sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711391392.9A CN108007231A (en) | 2017-12-21 | 2017-12-21 | A kind of air outlet micropore plate muffler for crossflow cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711391392.9A CN108007231A (en) | 2017-12-21 | 2017-12-21 | A kind of air outlet micropore plate muffler for crossflow cooling tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108007231A true CN108007231A (en) | 2018-05-08 |
Family
ID=62060350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711391392.9A Withdrawn CN108007231A (en) | 2017-12-21 | 2017-12-21 | A kind of air outlet micropore plate muffler for crossflow cooling tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108007231A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798520A (en) * | 2019-01-30 | 2019-05-24 | 艾欧史密斯(中国)热水器有限公司 | All-premixing burner and boiler is premixed entirely |
| CN113496692A (en) * | 2020-03-18 | 2021-10-12 | 香港大学 | Frequency modulation panel for sound absorber, sound absorber comprising frequency modulation panel and silencer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003106632A (en) * | 2001-09-28 | 2003-04-09 | Kurimoto Ltd | Silencer for air-conditioning duct |
| CN202090995U (en) * | 2011-06-20 | 2011-12-28 | 四川正升声学科技有限公司 | Slice-type silencer |
| CN204527056U (en) * | 2015-01-28 | 2015-08-05 | 长城汽车股份有限公司 | Vehicle body sheet metal hole blanking cover and corresponding vehicle |
| CN105952687A (en) * | 2016-03-17 | 2016-09-21 | 潘泉方 | Fan silencer |
| CN205876437U (en) * | 2016-07-19 | 2017-01-11 | 东莞市宏铭通风设备有限公司 | Micro -perforated plate muffler |
| US20170120673A1 (en) * | 2014-03-13 | 2017-05-04 | Honda Motor Co., Ltd. | Vehicle wheel |
| CN207741597U (en) * | 2017-12-21 | 2018-08-17 | 巴尔的摩冷却系统（苏州）有限公司 | A kind of air outlet micropore plate muffler for crossflow cooling tower |
-
2017
- 2017-12-21 CN CN201711391392.9A patent/CN108007231A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003106632A (en) * | 2001-09-28 | 2003-04-09 | Kurimoto Ltd | Silencer for air-conditioning duct |
| CN202090995U (en) * | 2011-06-20 | 2011-12-28 | 四川正升声学科技有限公司 | Slice-type silencer |
| US20170120673A1 (en) * | 2014-03-13 | 2017-05-04 | Honda Motor Co., Ltd. | Vehicle wheel |
| CN204527056U (en) * | 2015-01-28 | 2015-08-05 | 长城汽车股份有限公司 | Vehicle body sheet metal hole blanking cover and corresponding vehicle |
| CN105952687A (en) * | 2016-03-17 | 2016-09-21 | 潘泉方 | Fan silencer |
| CN205876437U (en) * | 2016-07-19 | 2017-01-11 | 东莞市宏铭通风设备有限公司 | Micro -perforated plate muffler |
| CN207741597U (en) * | 2017-12-21 | 2018-08-17 | 巴尔的摩冷却系统（苏州）有限公司 | A kind of air outlet micropore plate muffler for crossflow cooling tower |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798520A (en) * | 2019-01-30 | 2019-05-24 | 艾欧史密斯(中国)热水器有限公司 | All-premixing burner and boiler is premixed entirely |
| CN109798520B (en) * | 2019-01-30 | 2024-04-12 | 艾欧史密斯(中国)热水器有限公司 | Full premix burner and full premix boiler |
| CN113496692A (en) * | 2020-03-18 | 2021-10-12 | 香港大学 | Frequency modulation panel for sound absorber, sound absorber comprising frequency modulation panel and silencer |
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| 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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180508 |
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| WW01 | Invention patent application withdrawn after publication |