CN108005962A - A kind of noise reduction rear guide vane for propeller fan - Google Patents
A kind of noise reduction rear guide vane for propeller fan Download PDFInfo
- Publication number
- CN108005962A CN108005962A CN201711129516.6A CN201711129516A CN108005962A CN 108005962 A CN108005962 A CN 108005962A CN 201711129516 A CN201711129516 A CN 201711129516A CN 108005962 A CN108005962 A CN 108005962A
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- CN
- China
- Prior art keywords
- sound
- damping layer
- guide vane
- propeller fan
- noise reduction
- 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.)
- Granted
Links
- 230000009467 reduction Effects 0.000 title claims abstract description 29
- 238000013016 damping Methods 0.000 claims abstract description 32
- 238000010521 absorption reaction Methods 0.000 claims abstract description 15
- 229920000742 Cotton Polymers 0.000 claims abstract description 12
- 239000011521 glass Substances 0.000 claims abstract description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 8
- 239000004411 aluminium Substances 0.000 claims abstract description 8
- 238000005452 bending Methods 0.000 claims abstract description 8
- 238000009413 insulation Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 abstract description 12
- 230000008569 process Effects 0.000 abstract description 6
- 238000009423 ventilation Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000003584 silencer Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- 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
-
- 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
-
- 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/388—Blades characterised by construction
-
- 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
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
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 noise reduction rear guide vane for propeller fan.It is made of Ye Dingduan, interlude and blade root section；Leaf top section is identical with blade root segment structure, is formed successively by sound insulationg board, internal damping layer, sound-absorption glass cotton, external damping layer and perforated plate from internal layer to outer layer.Sound insulationg board is welded for lightweight aluminium sheet bending, and internal damping layer is coated in sound insulationg board outer surface, and perforated plate is welded for perforation lightweight aluminium sheet bending, coats external damping layer in perforated plate inner surface, sound-absorption glass cotton is filled between interior damping layer and external damping layer；Leaf top section and blade root section are welded to connect with interlude respectively, and are welded and fixed with propeller fan outer barrel and guide vane inner cylinder.According in propeller fan operational process, aerodynamic noise distribution and development characteristic, targetedly arrange noise reduction section on the leaf top of noise reduction rear guide vane and blade root position.Using the comprehensive method of sound absorption and sound insulation, effective viscous attenuation noise sound wave, so as to significantly reduce aerodynamic noise, has reached propeller fan noise reduction.
Description
Technical field
The present invention relates to propeller fan, more particularly to a kind of noise reduction rear guide vane for propeller fan.
Background technology
Modern society's industrial boom, noise pollution it is more prevalent with it is serious.With people to noise problem further
Pay attention to, noise has become the important indicator for weighing blower performance.GB19761-2009《Ventilator energy efficiency limit value and efficiency
Grade》The efficiency value of all kinds of ventilation blowers is not only defined, also defines noise figure.Therefore, from improvement staff's working environment
From the point of view of, the work tool that design reduces noise of axial flow fan is of great significance.
In propeller fan operational process, noise is mainly derived from aerodynamic noise.Aerodynamic noise includes rotational noise and whirlpool
Flow noise.In propeller fan rotating operation, nearby gas forms pressure fluctuation to movable vane rotary impact blade, produces rotation and makes an uproar
Sound；In addition, gas near wheel hub blade root and blade tip, since the influence of barometric gradient can form vortex, these vortex are in wheel hub
Wall and air duct wall easily form vortex pulsation, and then divide the noise waves for forming size vortex, produce eddy current crack.Vortex
It is very big that noise accounts for aerodynamic noise ratio, especially strong particularly near movable vane blade root and blade tip, and is swum out of downwards along air-flow
Mouth direction is developed.
At present, ventilation blower noise-reduction method focuses primarily upon the improvement in terms of ventilator structure（Such as movable vane piece form）With it is logical
The arrangement of fans silencer（Such as silencer is arranged in wind turbine import and export）.But these noise-reduction method techniques are more complicated, cost compared with
It is high.Therefore, according to the noise profile feature of ventilation blower, targetedly carrying out ventilation blower noise reduction process has economic benefit with showing
Sincere justice.
The content of the invention
Present invention aims at provide a kind of noise reduction rear guide vane for propeller fan.Pneumatically made an uproar according to propeller fan
The distribution of sound and development characteristic, using the comprehensive method of sound absorption and sound insulation, specific aim viscous attenuation noise sound wave, reaches effective drop
The purpose of low pneumatic noise.
In order to achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of noise reduction rear guide vane for propeller fan of the present invention, is made of Ye Dingduan, interlude and blade root section three parts；
Leaf top section is identical with blade root segment structure, successively by sound insulationg board, internal damping layer, sound-absorption glass cotton, external damping from internal layer to outer layer
Layer and perforated plate are formed.
The sound insulationg board is welded for lightweight aluminium sheet bending, coats internal damping layer in sound insulationg board outer surface, perforated plate is
Perforation lightweight aluminium sheet bending is welded, and external damping layer is coated in perforated plate inner surface, between interior damping layer and external damping layer
Fill sound-absorption glass cotton；Leaf top section and blade root section are welded to connect with interlude respectively, and with axial flow blower outer barrel and guide vane inner cylinder
It is welded and fixed.
The leaf top section accounts for the high h of leaf of 1/4-1/3 rear guide vanes with blade root section height respectively, is (1/4 ~ 1/3) h.
The internal damping layer and the external damping layer are pitch.
The device have the advantages that：
According in propeller fan operational process, aerodynamic noise is distributed and development characteristic, targetedly in the leaf of noise reduction rear guide vane
Top and blade root position arrangement noise reduction section.Using the comprehensive method of sound absorption and sound insulation, effective viscous attenuation noise sound wave, so that significantly
Aerodynamic noise is reduced, has reached propeller fan noise reduction.
Brief description of the drawings
Fig. 1 is propeller fan overall structure diagram
Fig. 2 is propeller fan noise reduction rear guide vane schematic diagram of the present invention
Fig. 3 is the denoising structure sectional view of propeller fan noise reduction rear guide vane of the present invention
In figure：1st, propeller fan outer barrel, 2, kuppe, 3, movable vane, 4, wheel hub, 5, rear guide vane, 5A, Ye Dingduan, 5B, centre
Section, 5C, blade root section, 5D, sound insulationg board, 5E, internal damping layer, 5F, sound-absorption glass cotton layer, 5G, external damping layer, 5H, perforated plate, 6, lead
Leaf inner cylinder.
Embodiment
The present invention is described further with reference to the accompanying drawings and examples.
As shown in Figure 1, Figure 2 and Figure 3, propeller fan overall structure, including：Propeller fan outer barrel 1, kuppe 2, move
Leaf 3, wheel hub 4, rear guide vane 5 and guide vane inner cylinder 6.A kind of noise reduction rear guide vane 5 for propeller fan of the present invention, by Ye Dingduan
5A, interlude 5B and blade root section 5C three parts are formed；Leaf top section 5A is identical with blade root section 5C structures, equal successively from internal layer to outer layer
It is made of sound insulationg board 5D, internal damping layer 5E, sound-absorption glass cotton 5F, external damping layer 5G and perforated plate 5H.
As shown in figures 1 and 3, the sound insulationg board 5D is welded for lightweight aluminium sheet bending, is applied in sound insulationg board 5D outer surfaces
Upper internal damping layer 5E, perforated plate 5H are welded for perforation lightweight aluminium sheet bending, and external damping layer is coated in perforated plate 5H inner surfaces
5G, fills sound-absorption glass cotton 5F between interior damping layer 5E and external damping layer 5G；Leaf top section 5A and blade root section 5C respectively with centre
Section 5B is welded to connect, and is welded and fixed with axial flow blower outer barrel 1 and guide vane inner cylinder 6.
As shown in Fig. 2, the leaf top section 5A accounts for the high h of leaf of 1/4-1/3 rear guide vanes 5 with blade root section 5C height respectively, it is
(1/4~1/3)h。
The internal damping layer 5E and external damping layer 5G is pitch.
The operation principle of the present invention is as follows：
As shown in Figure 1, Figure 2 and Figure 3, in propeller fan operational process, air-flow enters propeller fan from entrance, passes through successively
The rear guide vane 5 of kuppe 2, movable vane 3 and noise reduction, finally from propeller fan outlet outflow (as shown the direction of arrow in Figure 1).It is dynamic
Nearby gas forms pressure fluctuation to 3 rotary impact blade of leaf, so as to produce rotational noise.In addition, near blade root and blade tip
The influence of gas pressure gradient is most obvious, so as to form vortex.These vortex are in 1 wall of 4 wall of wheel hub and propeller fan outer barrel
Face easily forms vortex pulsation, and then divides the noise waves for forming size vortex, produces eddy current crack.Propeller fan was run
The rotational noise and eddy current crack produced in journey, is collectively referred to as aerodynamic noise.Engineering experience is drawn：Propeller fan operational process produces
In raw aerodynamic noise, eddy current crack accounts for enormous proportions, and on 1/4 ~ 1/3 movable vane, 3 Ye Gaoye tops and 1/4 ~ 1/3 movable vane, 3 leaf
High blade root position is especially strong, and along air-flow to export direction communication development.Therefore, in propeller fan operational process
The aerodynamic noise distribution of generation and development characteristic, are equipped with the rear guide vane 5 of noise reduction, the rear guide vane 5 of the noise reduction is by dropping in 3 downstream of movable vane
The blade root section 5C of leaf top section 5A, interlude 5B and the noise reduction made an uproar is formed, and the leaf top section 5A of noise reduction and the blade root section 5C of noise reduction distinguish
The rear guide vane high h of 5 leaf of 1/4 ~ 1/3 noise reduction is accounted for, is (1/4 ~ 1/3) h.Aerodynamic noise enters the leaf top of noise reduction through perforated plate 5H
The blade root of section 5A or noise reduction section 5C, acoustic wave segment are decayed under the viscous suction-operateds of sound-absorption glass cotton 5F, then propagate to internal resistance
Sound-absorption glass cotton 5F is reflexed under the efficient iris action of Buddhist nun's layer 5E and sound insulationg board 5D further to decay, then sound wave propagates to again
External damping layer 5G and perforated plate 5H and efficiently barrier are reflected back sound-absorption glass cotton 5F and further decay, by and so on declining
Subtract, only the sound wave after fraction decay can be returned in air-flow, very effective to reduce aerodynamic noise, reached axis circulation wind
Machine noise reduction.
Claims (4)
- A kind of 1. noise reduction rear guide vane for propeller fan, it is characterised in that：Rear guide vane is by Ye Dingduan (5A), interlude (5B) Formed with blade root section (5C) three parts；Leaf top section (5A) and blade root section (5C) structure are identical, from internal layer to outer layer successively by every Sound plate (5D), internal damping layer (5E), sound-absorption glass cotton (5F), external damping layer (5G) and perforated plate (5H) are formed.
- A kind of 2. noise reduction rear guide vane for propeller fan according to claims 1, it is characterised in that：The sound insulation Plate (5D) is welded for lightweight aluminium sheet bending, coats internal damping layer (5E) in sound insulationg board (5D) outer surface, perforated plate (5H) is Perforation lightweight aluminium sheet bending be welded, coat external damping layer (5G) in perforated plate (5H) inner surface, interior damping layer (5E) with Sound-absorption glass cotton (5F) is filled between external damping layer (5G)；Leaf top section (5A) and blade root section (5C) are welded with interlude (5B) respectively Connection, and be welded and fixed with axial flow blower outer barrel (1) and guide vane inner cylinder (6).
- A kind of 3. noise reduction rear guide vane for propeller fan according to claims 1, it is characterised in that：The leaf top Section (5A) accounts for the high h of leaf of 1/4-1/3 rear guide vanes (5) with blade root section (5C) height respectively, is (1/4 ~ 1/3) h.
- A kind of 4. noise reduction rear guide vane for propeller fan according to claims 1, it is characterised in that：The internal resistance Buddhist nun's layer (5E) and the external damping layer (5G) are pitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711129516.6A CN108005962B (en) | 2017-11-15 | 2017-11-15 | A kind of noise reduction rear guide vane for propeller fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711129516.6A CN108005962B (en) | 2017-11-15 | 2017-11-15 | A kind of noise reduction rear guide vane for propeller fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108005962A true CN108005962A (en) | 2018-05-08 |
| CN108005962B CN108005962B (en) | 2019-08-02 |
Family
ID=62052766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711129516.6A Active CN108005962B (en) | 2017-11-15 | 2017-11-15 | A kind of noise reduction rear guide vane for propeller fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108005962B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2364252Y (en) * | 1999-04-06 | 2000-02-16 | 范崇棉 | Low-noise cylindrical fan |
| CN2720170Y (en) * | 2004-08-10 | 2005-08-24 | 沈阳鹭岛通风净化设备有限责任公司 | Novel silenced fan |
| US20080295518A1 (en) * | 2007-05-29 | 2008-12-04 | United Technologies Corporation | Airfoil acoustic impedance control |
| US20090104024A1 (en) * | 2005-05-28 | 2009-04-23 | Siemens Aktiengesellschaft | Air intake for a turbocharger for an internal combustion engine |
| CN102927059A (en) * | 2011-08-10 | 2013-02-13 | 百事德机械（江苏）有限公司 | Novel acoustic shield |
| CN204164048U (en) * | 2014-09-30 | 2015-02-18 | 国网上海市电力公司 | A kind of Three way type air exhausting soundproofing elbow for 110kV transformer chamber |
| CN106402565A (en) * | 2016-11-08 | 2017-02-15 | 江苏英思达科技有限公司 | Sound absorption flow guide body |
-
2017
- 2017-11-15 CN CN201711129516.6A patent/CN108005962B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2364252Y (en) * | 1999-04-06 | 2000-02-16 | 范崇棉 | Low-noise cylindrical fan |
| CN2720170Y (en) * | 2004-08-10 | 2005-08-24 | 沈阳鹭岛通风净化设备有限责任公司 | Novel silenced fan |
| US20090104024A1 (en) * | 2005-05-28 | 2009-04-23 | Siemens Aktiengesellschaft | Air intake for a turbocharger for an internal combustion engine |
| US20080295518A1 (en) * | 2007-05-29 | 2008-12-04 | United Technologies Corporation | Airfoil acoustic impedance control |
| CN102927059A (en) * | 2011-08-10 | 2013-02-13 | 百事德机械（江苏）有限公司 | Novel acoustic shield |
| CN204164048U (en) * | 2014-09-30 | 2015-02-18 | 国网上海市电力公司 | A kind of Three way type air exhausting soundproofing elbow for 110kV transformer chamber |
| CN106402565A (en) * | 2016-11-08 | 2017-02-15 | 江苏英思达科技有限公司 | Sound absorption flow guide body |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108005962B (en) | 2019-08-02 |
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