CN108412800A - A kind of extraordinary wind turbine of explosion-proof noise elimination - Google Patents
A kind of extraordinary wind turbine of explosion-proof noise elimination Download PDFInfo
- Publication number
- CN108412800A CN108412800A CN201810518636.3A CN201810518636A CN108412800A CN 108412800 A CN108412800 A CN 108412800A CN 201810518636 A CN201810518636 A CN 201810518636A CN 108412800 A CN108412800 A CN 108412800A
- Authority
- CN
- China
- Prior art keywords
- noise elimination
- explosion
- wind turbine
- coaming plate
- proof
- 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
- 230000008030 elimination Effects 0.000 title claims abstract description 80
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 80
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000011491 glass wool Substances 0.000 claims abstract description 11
- 238000005192 partition Methods 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 241000237858 Gastropoda Species 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 2
- 229920000742 Cotton Polymers 0.000 claims 1
- 239000011148 porous material Substances 0.000 claims 1
- 239000011358 absorbing material Substances 0.000 abstract description 2
- 210000002105 tongue Anatomy 0.000 description 14
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
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
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of extraordinary wind turbines of explosion-proof noise elimination, there are one air inlet and air outlets for tool on its spiral case, there are one noise elimination kuppes for the air inlet connection, the noise elimination tour guide cover includes outer barrel and inner cylinder, super glass wool is filled between the outer barrel and inner cylinder, the inner cylinder includes water conservancy diversion transitional cylinder and conically shaped, and the barrel of the conically shaped is porous structure, and the material of the water conservancy diversion transitional cylinder is the metal different from impeller material.The coaming plate end of the air outlet position is volute tongue, and the outside of volute tongue is equipped with noise elimination block, and the noise elimination block is surrounded by front side board, back side panel and noise elimination coaming plate, and the wooden partition of the noise elimination coaming plate is porous structure, and super glass wool is filled in the noise elimination block.The present invention has the advantage that compared with prior art：The present invention can play explosion-proof in region of interest using soft or hard two kinds of materials, and sound-absorbing material super glass wool is used at air inlet and volute tongue, can significantly reduce the noise of wind turbine.
Description
Technical field
It is the present invention relates to a kind of extraordinary wind turbine of explosion-proof noise elimination, more particularly to explosion-proof to noise and the higher low noise of requirement of explosion proof
Wind turbine.
Background technology
Recently as the rapid development of national economy, the shortage of the energy, serious, row of the wind turbine as highly energy-consuming of pollution
Industry, noise pollution are also increasingly paid attention to, and requirement of the country for noise is also higher and higher, are ensureing that fan performance is basic
In the case of constant, reduce fan noise and also become current a big difficulty.The noise of wind turbine has seriously affected the life of people
Bioplasm amount reduces fan noise, and for improving the ambient enviroment of fan operation, the research level for improving fan industry field has
Important meaning.
Invention content
In order to solve the problems, such as that the universal noise of current fan industry is higher, the invention discloses a kind of extraordinary wind of explosion-proof noise elimination
Machine.
The purpose of the present invention is realized by following technical proposals:A kind of extraordinary wind turbine of explosion-proof noise elimination, including a fan body,
The fan body includes spiral case, impeller and motor, and the spiral case is by a front side board, a back side panel and is connected to forward and backward
Snail shape coaming plate between side plate is constituted, and is set on the front side board of the spiral case there are one air inlet, the spiral case also have there are one go out
The coaming plate end in air port, the air outlet position is volute tongue, and there are one noise elimination kuppe, the noise elimination is led for the air inlet connection
Trip cover includes outer barrel and inner cylinder, and super glass wool is filled between the outer barrel and inner cylinder, and the inner cylinder includes close to air inlet
The barrel of the water conservancy diversion transitional cylinder and the conically shaped on the outside of it of position, the conically shaped is porous structure, the water conservancy diversion transition
The material of cylinder is the metal different from impeller material.
The coaming plate is located at the outside at volute tongue and is equipped with noise elimination block, and the noise elimination block includes two pieces respectively from front side board with after
It is connected with one piece between the preceding noise elimination side plate and rear noise elimination side plate of the equal extension of side plate, the preceding noise elimination side plate and rear noise elimination side plate
The wooden partition of noise elimination coaming plate, the noise elimination coaming plate is porous structure, and super glass wool is filled in the noise elimination block.
The porosity of the porous structure of the barrel of the conically shaped is 25-30%, and aperture is 4-6 millimeters.
The porosity of the porous structure of the wooden partition of the noise elimination coaming plate is 25-30%, and aperture is 4-6 millimeters.
The volute tongue end of the preceding noise elimination side plate and rear noise elimination side plate has length difference.
The volute tongue is incline tongue, angle of inclination a, a=65-70 degree.
The present invention has the advantage that compared with prior art：The present invention can be risen in region of interest using soft or hard two kinds of materials
To explosion-proof, and sound-absorbing material super glass wool is used at air inlet and volute tongue, can significantly reduce wind turbine
Noise.
Description of the drawings
Fig. 1 is the side structure schematic view of wind turbine；
Fig. 2 is wind turbine main structure diagram；
Fig. 3 is the structural schematic diagram of noise elimination tour guide cover；
Fig. 4 is the partial enlarged view of water conservancy diversion transitional cylinder；
Fig. 5 is the structural schematic diagram of noise elimination block.
In figure：1- front side boards, 2- back side panels, 3- coaming plates, 4- air inlets, 5- air outlets, 6- volute tongues, 8- fan bodies, 9-
Spiral case, 10- impellers, 11- outer barrels, 12- inner cylinders, 13- super glass wools, 14- water conservancy diversion transitional cylinders, 15- conically shapeds, 21- noise elimination blocks,
It eliminates the noise before 22- side plate, side plate of eliminating the noise after 23-, 24- noise elimination coaming plates.
Specific implementation mode
As Figure 1-Figure 5, described the invention discloses a kind of extraordinary wind turbine of explosion-proof noise elimination, including a fan body 8
Fan body 8 include spiral case 9, impeller 10 and motor, the spiral case by 1, back side panel 2 of a front side board and before being connected to,
Snail shape coaming plate 3 between back side panel is constituted, and is set on the front side board 1 of the spiral case there are one air inlet 4, the spiral case also has
The coaming plate end of one air outlet 5,5 position of the air outlet is volute tongue 6, and the volute tongue 6 is incline tongue, angle of inclination
For a, a=65-70 degree；There are one noise elimination kuppes for the connection of the air inlet 4, and the noise elimination tour guide cover includes outer barrel 11 and inner cylinder
12, super glass wool 13 is filled between the outer barrel 11 and inner cylinder 12, the inner cylinder 12 includes close to 4 position of air inlet
The barrel of water conservancy diversion transitional cylinder 14 and the conically shaped 15 on the outside of it, the conically shaped 15 is porous structure, the water conservancy diversion transition
The material of cylinder 14 is the metal different from impeller material, and aluminum or copper etc. can be used in the water conservancy diversion transitional cylinder, from economic angle
Degree, it will usually use aluminum.
The explosion-proof coaming plate 3 for eliminating the noise extraordinary wind turbine of the present invention is located at the outside at volute tongue 6 and is equipped with noise elimination block 21,
The noise elimination block 21 includes two blocks of preceding noise elimination side plate 22 from the extension equal with back side panel 2 of front side board 1 and rear noise elimination side plates respectively
23, one block of noise elimination coaming plate 24, the plate of the noise elimination coaming plate 24 are connected between the preceding noise elimination side plate 22 and rear noise elimination side plate 23
Wall is porous structure, and super glass wool 13 is filled in the noise elimination block 21.
Embodiment one：First innovative point of the present invention is that noise elimination tour guide cover includes outer barrel 11 and inner cylinder 12, it is described outside
Super glass wool 13 is filled between cylinder 11 and inner cylinder 12, the inner cylinder 12 includes the water conservancy diversion transitional cylinder close to 4 position of air inlet
14 and the conically shaped 15 on the outside of it, the barrel of the conically shaped 15 is porous structure, is carried out at the noise elimination at air inlet 4
Reason.The porosity of the porous structure of the barrel of the usual conically shaped 15 is 25-30%, and aperture is 4-6 millimeters, preferably 28%
Porosity and 5 millimeters of aperture.
Embodiment two：The present invention second innovative point the water conservancy diversion transitional cylinder 14 material be with 10 material of impeller not
Same metal.Wherein impeller 10 is steel, and water conservancy diversion transitional cylinder 14 is aluminum or copper, preferably aluminum, due to impeller 10 and water conservancy diversion
Transitional cylinder 14 uses two kinds of soft or hard different materials, can prevent impeller from being generated in collision, friction process with water conservancy diversion transitional cylinder
Spark plays explosion-proof effect.
Embodiment three：The third innovative point of the present invention is that the outside that the coaming plate is located at volute tongue 6 is equipped with noise elimination block
21, the noise elimination block 21 includes two pieces of preceding noise elimination side plate 22 from the extension equal with back side panel 2 of front side board 1 and rear noise elimination sides respectively
It is connected with one block of noise elimination coaming plate 24 between plate 23, the preceding noise elimination side plate 22 and rear noise elimination side plate 23, the noise elimination coaming plate 24
Wooden partition is porous structure, and super glass wool 13 is filled in the noise elimination block 21, carries out sqouynd absorption lowering noise processing.The noise elimination coaming plate
The porosity of the porous structure of 24 wooden partition is 25-30%, and aperture is 4-6 millimeters.It is preferred that 28% porosity and 5 millimeters of hole
Diameter.
Example IV：The 4th innovative point of the present invention is the volute tongue of the preceding noise elimination side plate 22 and rear noise elimination side plate 23
End has length difference.As shown in figure 5, the top usually the top of rear noise elimination side plate 23 above preceding noise elimination side plate 22, this
Sample so that noise elimination coaming plate 24 is oblique on the top of noise elimination block 21, and air-flow usually will produce vortex when flowing through at volute tongue,
The design on usual skewed 21 top of noise elimination block, can break up vortex, further eliminate the noise generated by vortex.
The invention can significantly reduce the noise of wind turbine, for fan operation ambient enviroment and improve fan industry
The solution of field noise problem has great importance.There is explosion-proof performance simultaneously.
Claims (6)
1. a kind of extraordinary wind turbine of explosion-proof noise elimination, including a fan body (8), the fan body (8) they include spiral case (9), leaf
(10) and motor are taken turns, the spiral case is by a front side board (1), a back side panel (2) and the snail shape being connected between forward and backward side plate
Coaming plate (3) is constituted, and is set on the front side board (1) of the spiral case there are one air inlet (4), the spiral case also have there are one air outlet
(5), the coaming plate end of air outlet (5) position is volute tongue (6), it is characterised in that there are one disappear for air inlet (4) connection
Sound kuppe, the noise elimination tour guide cover includes outer barrel (11) and inner cylinder (12), is filled between the outer barrel (11) and inner cylinder (12)
It includes close to the water conservancy diversion transitional cylinder (14) of air inlet (4) position and outside it to have super glass wool (13), the inner cylinder (12)
The conically shaped (15) of side, the barrel of the conically shaped (15) are porous structure, and the material of the water conservancy diversion transitional cylinder (14) is and leaf
Take turns the different metal of material.
2. the extraordinary wind turbine of explosion-proof noise elimination according to claim 1, it is characterised in that the coaming plate is located at outer at volute tongue (6)
Side is equipped with noise elimination block (21), and the noise elimination block (21) includes two pieces respectively before front side board (1) extension equal with back side panel (2)
It is connected with one piece between noise elimination side plate (22) and rear noise elimination side plate (23), the preceding noise elimination side plate (22) and rear noise elimination side plate (23)
The wooden partition of noise elimination coaming plate (24), the noise elimination coaming plate (24) is porous structure, and superfine glass is filled in the noise elimination block (21)
Cotton (13).
3. the extraordinary wind turbine of explosion-proof noise elimination according to claim 1, it is characterised in that the barrel of the conically shaped (15) it is more
The porosity of pore structure is 25-30%, and aperture is 4-6 millimeters.
4. the extraordinary wind turbine of explosion-proof noise elimination according to claim 2, it is characterised in that the wooden partition of the noise elimination coaming plate (24)
The porosity of porous structure is 25-30%, and aperture is 4-6 millimeters.
5. the extraordinary wind turbine of explosion-proof noise elimination according to claim 2, it is characterised in that the preceding noise elimination side plate (22) and after disappear
The volute tongue end of sound side plate (23) has length difference.
6. the extraordinary wind turbine of explosion-proof noise elimination according to claim 2, it is characterised in that the volute tongue (6) is incline tongue,
Angle of inclination is a, a=65-70 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810518636.3A CN108412800A (en) | 2018-05-25 | 2018-05-25 | A kind of extraordinary wind turbine of explosion-proof noise elimination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810518636.3A CN108412800A (en) | 2018-05-25 | 2018-05-25 | A kind of extraordinary wind turbine of explosion-proof noise elimination |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108412800A true CN108412800A (en) | 2018-08-17 |
Family
ID=63140535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810518636.3A Pending CN108412800A (en) | 2018-05-25 | 2018-05-25 | A kind of extraordinary wind turbine of explosion-proof noise elimination |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108412800A (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2159467Y (en) * | 1992-07-24 | 1994-03-23 | 魏厚瑶 | High effective, energy saving and low noise blower |
| JP2001107899A (en) * | 1999-10-12 | 2001-04-17 | Daikin Ind Ltd | Bell-mouse structure of fan |
| KR200310412Y1 (en) * | 2003-01-17 | 2003-04-14 | 주식회사 삼정기연 | A silencer of ventilator |
| CN2766070Y (en) * | 2004-12-09 | 2006-03-22 | 久朝企业有限公司 | Centrifugal air-foiled fan on roof |
| CN201277204Y (en) * | 2008-10-24 | 2009-07-22 | 昆明理工大学 | Energy-saving denoising centrifugal ventilation machine |
| US20100040456A1 (en) * | 2008-08-13 | 2010-02-18 | Furui Precise Component (Kunshan) Co., Ltd. | Centrifugal fan |
| US20100226766A1 (en) * | 2007-05-11 | 2010-09-09 | Mitsubishi Heavy Industries, Ltd. | Centrifugal Blower |
| CN102465921A (en) * | 2010-11-15 | 2012-05-23 | 南通大通宝富风机有限公司 | Fan casing with noise reduction fan tongue |
| CN102654137A (en) * | 2011-03-02 | 2012-09-05 | 南通大通宝富风机有限公司 | Air inlet set additionally provided with copper ring for air blower |
| CN202991632U (en) * | 2012-10-31 | 2013-06-12 | 重庆通用工业(集团)有限责任公司 | Anti-explosion air inlet of centrifugal fan |
| CN203570701U (en) * | 2013-09-27 | 2014-04-30 | 山西巨龙风机有限公司 | Silencer of high-speed wire rod rolling cold air control fan |
| CN204493227U (en) * | 2015-01-22 | 2015-07-22 | 南通市宏大风机有限公司 | A kind of roof ventilator |
| CN107013494A (en) * | 2017-05-11 | 2017-08-04 | 南通升科节能技术有限公司 | Noise-lowering centrifugal blower fan |
| CN206397820U (en) * | 2017-01-04 | 2017-08-11 | 艾欧史密斯(中国)热水器有限公司 | Air purifier, blower fan and its volute of blower |
| CN208417037U (en) * | 2018-05-25 | 2019-01-22 | 绍兴智新机电科技有限公司 | A kind of extraordinary blower of explosion-proof noise elimination |
-
2018
- 2018-05-25 CN CN201810518636.3A patent/CN108412800A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2159467Y (en) * | 1992-07-24 | 1994-03-23 | 魏厚瑶 | High effective, energy saving and low noise blower |
| JP2001107899A (en) * | 1999-10-12 | 2001-04-17 | Daikin Ind Ltd | Bell-mouse structure of fan |
| KR200310412Y1 (en) * | 2003-01-17 | 2003-04-14 | 주식회사 삼정기연 | A silencer of ventilator |
| CN2766070Y (en) * | 2004-12-09 | 2006-03-22 | 久朝企业有限公司 | Centrifugal air-foiled fan on roof |
| US20100226766A1 (en) * | 2007-05-11 | 2010-09-09 | Mitsubishi Heavy Industries, Ltd. | Centrifugal Blower |
| US20100040456A1 (en) * | 2008-08-13 | 2010-02-18 | Furui Precise Component (Kunshan) Co., Ltd. | Centrifugal fan |
| CN201277204Y (en) * | 2008-10-24 | 2009-07-22 | 昆明理工大学 | Energy-saving denoising centrifugal ventilation machine |
| CN102465921A (en) * | 2010-11-15 | 2012-05-23 | 南通大通宝富风机有限公司 | Fan casing with noise reduction fan tongue |
| CN102654137A (en) * | 2011-03-02 | 2012-09-05 | 南通大通宝富风机有限公司 | Air inlet set additionally provided with copper ring for air blower |
| CN202991632U (en) * | 2012-10-31 | 2013-06-12 | 重庆通用工业(集团)有限责任公司 | Anti-explosion air inlet of centrifugal fan |
| CN203570701U (en) * | 2013-09-27 | 2014-04-30 | 山西巨龙风机有限公司 | Silencer of high-speed wire rod rolling cold air control fan |
| CN204493227U (en) * | 2015-01-22 | 2015-07-22 | 南通市宏大风机有限公司 | A kind of roof ventilator |
| CN206397820U (en) * | 2017-01-04 | 2017-08-11 | 艾欧史密斯(中国)热水器有限公司 | Air purifier, blower fan and its volute of blower |
| CN107013494A (en) * | 2017-05-11 | 2017-08-04 | 南通升科节能技术有限公司 | Noise-lowering centrifugal blower fan |
| CN208417037U (en) * | 2018-05-25 | 2019-01-22 | 绍兴智新机电科技有限公司 | A kind of extraordinary blower of explosion-proof noise elimination |
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