CN104121232A - Large fan in-out air muffling tower - Google Patents
Large fan in-out air muffling tower Download PDFInfo
- Publication number
- CN104121232A CN104121232A CN201410209922.3A CN201410209922A CN104121232A CN 104121232 A CN104121232 A CN 104121232A CN 201410209922 A CN201410209922 A CN 201410209922A CN 104121232 A CN104121232 A CN 104121232A
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- Prior art keywords
- tower
- muffling
- noise reduction
- sound
- sound damping
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- 230000009467 reduction Effects 0.000 claims description 29
- 238000013016 damping Methods 0.000 claims description 26
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000001413 cellular effect Effects 0.000 claims description 4
- 241000736911 Turritella communis Species 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000001228 spectrum Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000009423 ventilation Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000002745 absorbent Effects 0.000 description 6
- 239000002250 absorbent Substances 0.000 description 6
- 230000009102 absorption Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 230000003584 silencer Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000003792 cranial nerve Anatomy 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Provided is a muffling tower installed in an air in-out port of a large fan. A muffler is in a square column type in appearance and is provided with square muffling units inside. The muffling tower covers the air in-out port of the fan and is connected with the fan in a diameter-changing and flexible connection mode, the square muffling units inside the muffler are mutually linked, and the windward sides are provided with flow guide wedges. The muffling tower has the advantages that after air flow enters the muffling tower and enters the muffling units after being divided, full-frequency muffling is achieved in the muffling units through resistance muffling (resonant cavities) and resistance muffling, noise is effectively reduced, and air resistance is little so that the situations that due to the fact that an expansion cavity ( resistance muffling) is used, eddy currents are produced, and ventilation resistance and energy consumption are increased cannot occur. The muffling tower can reduce energy consumption, reaches environment protection standards and enables a processed audio frequency spectrum to approach an NR curve.
Description
Technical field
The present invention relates to the baffler of various large fans, particularly super-huge high pressure positive blower.
Background technique
Along with the economy of China develops rapidly, because operating mode needs, large fan is widely used, it is up to standard that the noise that this large fan produces has a strong impact on factory circle, and disturb residents, even if factory circle having (being that equivalent sound value is up to standard) up to standard, because low frequency noise reduction is not good, (all-bottom sound has a strong impact on human heart and cranial nerve, and in air, propagation attenuation is slow, propagation length is far away), still there is resident to complain, be expansion cavity if adopt traditional first order, the second level is resistive noise reduction, can produce eddy current, cause energy consumption obviously to increase, and low frequency erasure effect be poor.
Fig. 2 is the sectional drawing of the impedance complex sound damping tower of traditional common, because air-flow enters expansion cavity, can produce to a certain extent eddy current, thereby produce larger energy dissipation, and the anti-formula erasure effect of expansion cavity is not good, after noise reduction, frequency spectrum and noisc rating number gap are larger, particularly low frequency part, even if equivalent sound value is up to standard, someone complains in the same old way.
Summary of the invention
The technical solution used in the present invention is: this expansion cavity is that resonant cavity (or resistance sound absorbent) and resistive sound absorbent are combined into single noise reduction unit, instead of connect with resistive noise reduction, jointly form sound damping tower by several noise reduction unit, the air-flow of blower fan from sound damping tower into and out of time, by reducing joint noise reduction tower, guide plate in reducing, ensures that air-flow is evenly by sound damping tower, thereby makes the maximizing efficiency of whole sound damping tower in the time eliminating air power noise.Head-on holding, there is splitter at resonant cavity (or resistance sound absorbent) and resistive sound absorbent two ends, thereby improve the power character of air, windage minimum while making by tower body.
Beneficial effect of the present invention is: enter guide plate by the gas that blower fan bloats, drum enters, enter again multiple noise reductions unit of sound damping tower, through three resistive sound absorptions and one side resistance sound absorption (resonant cavity or anti-formula sound absorbent), not only reduce high-frequency noise, also reduce low-frequency noise, make frequency spectrum after treatment substantially meet noisc rating number, also effectively fall low noise intensity, thereby reach desirable improvement object.
fig. 1 be sound damping tower stereogram,
fig. 2 is the sectional drawing of traditional sound damping tower
Fig. 3 is the sectional drawing of this invention sound damping tower
In Fig. 3: 1, resistive bloop noise reduction splitter 2, resistant noise-reducing sheet noise reduction splitter
3, the resistive bloop 4 of sound damping tower outer wall, square noise reduction unit
5, resistive bloop in resonant cavity (or low frequency bloop) 6, tower body
7, shunting silencer 8, noise reduction reducing
9, adpting flange 10, be flexible coupling
11, resistive bloop in blower fan inlets and putlets of ventilation 12, tower body
Fig. 4 is the plan view of this invention sound damping tower
Concrete brief description of the drawings:
The structure of sound damping tower of the present invention is: each noise reduction unit of sound damping tower interconnects, formation grid is cellular, shell 3 is by inhaling, sound insulationg board forms, interior resistive absorbent treatment 12 and resonant cavity 5, resistive bloop 6 is combined into noise reduction unit 4, interior noise reduction unit is by resonant cavity 5, resistive sound absorption plate 12, the common composition sound damping tower of resistive sound absorption plate 6 main body is connected with noise reduction reducing 8, noise reduction reducing shell and interior shunting silencer 7 form, the air-flow entering is shunted, make it evenly enter noise reduction unit, the working efficiency of sound damping tower is maximized, for preventing entering of sound damping tower and blower fan, exhaust outlet produces resonance, adding one at the inlets and putlets of ventilation of noise reduction reducing 8 and blower fan is flexible coupling, be flexible coupling and the common system that is flexible coupling that forms of adpting flange 9.
The present invention adopts resistant noise-reducing and resistive noise reduction, expansion cavity is changed into resonant cavity, serial fashion is made into parallel way, reach the object of noise reduction by the variation in combination, its advantage is: owing to adopting splitter and resistance, anti-parallel connection, greatly reduce flowing resistance, energy efficient greatly, and reduce sound damping tower height.Because resonant cavity (or low frequency absorption body) more can effectively absorb low frequency than expansion cavity, substantially meet noisc rating number by this sound damping tower audio frequency spectrum after treatment.
Claims (4)
1. a large fan outlet and inlet sound damping tower, sound damping tower shell is suction, dividing plate, external form has the square-column-shaped of cellular noise reduction unit in the middle of being, inner combined by cellular square cavity (being noise reduction unit), windward side is made with splitter, by reducing, be flexible coupling, be connected with blower fan, and have part flow arrangement, and it is characterized in that the cellular noise reduction of sound damping tower unit interlinks, noise reduction unit is connected with tower shell.
2. according to its feature of the sound damping tower described in claim: multiple noise reductions unit, each square noise reduction unit 4 structures are: three (3.6.5 or 12.5.6.) is resistive sound absorption (high frequency sound disappears), one side is resonant cavity sound absorption (5), be the resistance sound absorption low frequency that disappears, size, size, thickness are determined according to actual needs.
3. according to claim 1, large fan sound damping tower, is characterized by: sound insulationg board, for dull and stereotyped, is positioned at sound damping tower radially in the middle of resonant cavity, and resonant cavity is also for radially, and two ends are with water conservancy diversion splitter.
4. according to the large fan sound damping tower of claim 1, what its feature was used by tower wall noise reduction unit is the resistive noise reduction of inner wall of tower, and is directly connected with tower wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209922.3A CN104121232A (en) | 2014-05-19 | 2014-05-19 | Large fan in-out air muffling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209922.3A CN104121232A (en) | 2014-05-19 | 2014-05-19 | Large fan in-out air muffling tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104121232A true CN104121232A (en) | 2014-10-29 |
Family
ID=51766793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410209922.3A Pending CN104121232A (en) | 2014-05-19 | 2014-05-19 | Large fan in-out air muffling tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104121232A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105139844A (en) * | 2015-09-17 | 2015-12-09 | 四川迈铁龙科技有限公司 | Composite noise elimination apparatus for ventilation tunnel |
| CN105413331A (en) * | 2016-01-05 | 2016-03-23 | 青岛鑫恒德电器有限公司 | Composite air cleaner silencing device |
| CN106678084A (en) * | 2017-01-10 | 2017-05-17 | 吴光明 | Ventilation silencing device |
| CN108266409A (en) * | 2018-01-17 | 2018-07-10 | 东北大学 | A kind of attachment device for reducing fan noise |
| CN108413123A (en) * | 2018-04-03 | 2018-08-17 | 吴光明 | A kind of safety valve exhaust muffling device |
| CN109869354A (en) * | 2019-04-19 | 2019-06-11 | 临沂远通风机有限公司 | Muffler for fan |
| CN111540340A (en) * | 2020-05-09 | 2020-08-14 | 吴光明 | Noise environment treatment method |
Citations (8)
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|---|---|---|---|---|
| US6019808A (en) * | 1997-06-20 | 2000-02-01 | Hitachi, Ltd. | Air cleaner |
| CN2777256Y (en) * | 2005-03-24 | 2006-05-03 | 华北科技学院 | Noise elimination apparatus for coal mine main ventilation machine |
| CN101775851A (en) * | 2010-03-12 | 2010-07-14 | 陈业新 | Grate muffler and preparation method thereof |
| CN201779073U (en) * | 2010-04-26 | 2011-03-30 | 浙江志江风机有限公司 | Impedance compound silencer |
| CN102072202A (en) * | 2011-01-12 | 2011-05-25 | 浙江海洋学院 | Sound-absorption and noise-reduction device of compact fishing boat cabin ventilator |
| CN201908875U (en) * | 2011-01-14 | 2011-07-27 | 无锡市华通环保设备有限公司 | High-efficiency, energy-saving muffler for supplementary fan of large thermal power generating unit |
| CN102536916A (en) * | 2010-12-09 | 2012-07-04 | 贵州省鼓风机厂 | High-flow ventilator silencer and manufacturing method thereof |
| CN203013243U (en) * | 2012-10-16 | 2013-06-19 | 厦门嘉达环保建造工程有限公司 | Air shaft impedance noise elimination structure |
-
2014
- 2014-05-19 CN CN201410209922.3A patent/CN104121232A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6019808A (en) * | 1997-06-20 | 2000-02-01 | Hitachi, Ltd. | Air cleaner |
| CN2777256Y (en) * | 2005-03-24 | 2006-05-03 | 华北科技学院 | Noise elimination apparatus for coal mine main ventilation machine |
| CN101775851A (en) * | 2010-03-12 | 2010-07-14 | 陈业新 | Grate muffler and preparation method thereof |
| CN201779073U (en) * | 2010-04-26 | 2011-03-30 | 浙江志江风机有限公司 | Impedance compound silencer |
| CN102536916A (en) * | 2010-12-09 | 2012-07-04 | 贵州省鼓风机厂 | High-flow ventilator silencer and manufacturing method thereof |
| CN102072202A (en) * | 2011-01-12 | 2011-05-25 | 浙江海洋学院 | Sound-absorption and noise-reduction device of compact fishing boat cabin ventilator |
| CN201908875U (en) * | 2011-01-14 | 2011-07-27 | 无锡市华通环保设备有限公司 | High-efficiency, energy-saving muffler for supplementary fan of large thermal power generating unit |
| CN203013243U (en) * | 2012-10-16 | 2013-06-19 | 厦门嘉达环保建造工程有限公司 | Air shaft impedance noise elimination structure |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105139844A (en) * | 2015-09-17 | 2015-12-09 | 四川迈铁龙科技有限公司 | Composite noise elimination apparatus for ventilation tunnel |
| CN105413331A (en) * | 2016-01-05 | 2016-03-23 | 青岛鑫恒德电器有限公司 | Composite air cleaner silencing device |
| CN105413331B (en) * | 2016-01-05 | 2018-01-02 | 青岛鑫恒德电器有限公司 | Combined air clearing machine silencing means |
| CN106678084A (en) * | 2017-01-10 | 2017-05-17 | 吴光明 | Ventilation silencing device |
| CN108266409A (en) * | 2018-01-17 | 2018-07-10 | 东北大学 | A kind of attachment device for reducing fan noise |
| CN108413123A (en) * | 2018-04-03 | 2018-08-17 | 吴光明 | A kind of safety valve exhaust muffling device |
| CN109869354A (en) * | 2019-04-19 | 2019-06-11 | 临沂远通风机有限公司 | Muffler for fan |
| CN109869354B (en) * | 2019-04-19 | 2024-05-14 | 临沂远通风机有限公司 | Fan silencer |
| CN111540340A (en) * | 2020-05-09 | 2020-08-14 | 吴光明 | Noise environment treatment method |
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Application publication date: 20141029 |