CN107355426A - A kind of super low noise bumps biomimetic type subway tunnel propeller fan movable vane piece - Google Patents
A kind of super low noise bumps biomimetic type subway tunnel propeller fan movable vane piece Download PDFInfo
- Publication number
- CN107355426A CN107355426A CN201710702157.2A CN201710702157A CN107355426A CN 107355426 A CN107355426 A CN 107355426A CN 201710702157 A CN201710702157 A CN 201710702157A CN 107355426 A CN107355426 A CN 107355426A
- Authority
- CN
- China
- Prior art keywords
- blade
- low noise
- propeller fan
- type
- movable vane
- 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
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0246—Surge control by varying geometry within the pumps, e.g. by adjusting vanes
-
- 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
Abstract
The invention discloses a kind of super low noise bumps biomimetic type subway tunnel propeller fan movable vane piece, it includes blade, blade tip and blade root positioned at the blade head and the tail, it is divided into several sections from the blade root to the radial direction of blade tip, the center of gravity product superimposing thread in each section adds the compound arrangement of sweepforward using sweepback, the blade is in inverted " C " shape in the direction of the air flow, and flange-type petiole is provided with the blade root, streamlined intensive aspect is provided between blade and the flange-type petiole.After subway/tunnel propeller fan takes the bionical inverted " C " font design of conjunction, the purer sweepforward type of operational efficiency of blade is greatly improved, reduce simultaneously and synchronously the eddy current crack of blade, and improve security reliability, reached efficiently, the good result taken into account of low noise, high safety this three.
Description
Technical field
The present invention relates to a kind of blade, more particularly to a kind of super low noise bumps biomimetic type subway tunnel propeller fan to move
Blade.
Background technology
Subway/tunnel propeller fan is mainly used in underground or the closing space of urban track traffic and highway/railway
Ventilation and fire control smoke exhausting, general air quantity it is very big with matched power（Maximum reachable 355kW or so）, due to axle circulation wind
The noise behavior of machine in itself, under identical air quantity, blast, noise 10dB (A) left and right typically high compared with centrifugal fan, and also deposit
In parallel running operating mode, now noise can be further added by 3dB (A) on the basis of separate unit blower fan, and subway/tunnel axle circulation wind
The mounting arrangements place of machine is generally close from passenger and periphery inhabitation personnel, by GB 3096-2008《Standard for acoustic environmental quality》
The class regional requirements subway station wind booth outlet of highest 0 is required as defined in middle table 1：Sound pressure level noise≤50dB (A), night between daytime
Sound pressure level noise≤40dB (A).
（1）By taking the exhaust fan of day-to-day operation in subway as an example, canonical parameter is：Impeller diameter 1800mm, wheel speed
985rpm, air quantity 50m3/ s, total head 800Pa, blade is using conventional straight torsion type structure, by GB 19761-2009《Ventilator energy efficiency
Limit value and efficiency grade》Middle 1 grade of efficiency fan outlet sound pressure level noise of efficiency highest 96dB (A) left and right, go out in blower fan
Mouthful install the long strip-type silencers of 2m additional and plus the Natural Attenuation in heat extraction air channel after, noise can reach 45dB at the wind booth of subway station
(A) left and right, it is usually to disappear by the fan outlet for lengthening 1m again merely now if to meet noise≤40dB (A) requirement
Sound device length solves, but therefore more material cost can be brought to consume, and returns building arrangements design and bring difficulty, now
How effectively to be dropped again by advanced effective pneumatic design optimization in the case where blower fan efficiency level is already close to theoretical limit
Low noise is particularly important.
（2）Plunder Combination Design using curved although having in other industries or bionical processing is carried out in blade（Such as sawtooth pattern tail
Edge or in blade surface perforate）The design of noise reduction is effectively carried out, but these designs can greatly reduce the safety of blade in itself
Property, therefore almost do not used in the propeller fan of big load.
Current existing preceding type plunders bionic blade, and although more conventional straight torsion type blade noise decreases（Absolute noise can drop
Low 3dB (A) left and right）, while also can effectively raising efficiency it is horizontal, and the nargin of stall proof surge has also increased, but sweepforward leaf
Piece produces a larger eccentric moment due to centre-of gravity shift caused by more conventional straight torsion type blade, therefore causes blade
Local stress is multiplied, therefore security deficiency turns into the biggest obstacle for hindering the application of its large-scale popularization.
Also used rear profile plunders bionic blade in the wing of the fighter jet of external early stage and its compressor of engine
Structure, although its more conventional straight torsion type blade noise reduction is obvious, its entirety acting ability and stall flutter nargin are
Reduce, therefore either Aviation Industry or ventilation blower industry later stage is using less.
Accordingly, it is desirable to provide a kind of new technical scheme solves the above problems.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of super low noise bumps biomimetic type subway tunnel propeller fan
Movable vane piece, on the basis of comprehensive utilization sweepback with the bionical reduction noise of sweepforward, then effectively lifting fan operation efficiency, also simultaneously
Stall flutter area will be reduced, improve the subway tunnel propeller fan movable vane piece of security reliability.
In order to solve the above technical problems, the present invention provides a kind of super low noise bumps biomimetic type subway tunnel propeller fan
Movable vane piece, it includes blade, blade tip and blade root positioned at the blade head and the tail, divides from the blade root to the radial direction of blade tip
For several sections, the center of gravity product superimposing thread in each section adds the compound arrangement of sweepforward using sweepback, and the blade is in the direction of the air flow
Inverted " C " shape, flange-type petiole is provided with the blade root, be provided between blade and the flange-type petiole it is streamlined plus
Qiang Ti.
The blade inlet edge is radially arranged the matrix leading edge and convex trailing edge of a number of fairing along airflow direction.
It is in inverted " C " font with the blade that matrix leading edge and convex trailing edge are integrally arranged.
Centroid of section product superimposing thread shape in each height of blade is designed using inverted " C " word：Namely from blade root up to leaf
Piece near middle, take 10 ° -20 ° of sweepback to design, be effectively utilized blade root middle and lower part aerofoil profile it is relatively thick when use sweepback knot
Structure noise reduction and it is safe the advantages of；Close to middle part up until blade tip at using 10 ° -20 ° sweepforward design, reach noise reduction,
Synergy, the purpose for expanding stall flutter nargin.
Due to being respectively sweepforward and sweepback structure up and down near the centre position in blade height direction, sweepforward center of gravity is accumulated folded
Center of gravity biased forwards amount caused by line style line caused by sweepback center of gravity product superimposing thread molded line offset backward by offset, so that leaf
Piece entirety stressing conditions and conventional straight torsion type blade are basically identical, and emphasis solves the great difficult problem of security deficiency.
Beneficial effects of the present invention：The super low noise bumps biomimetic type subway tunnel propeller fan movable vane piece of the present invention,
On the basis of sweepback and the bionical features of sweepforward, using the method for passive flowing control, by the excellent of two kinds of biomimetic features
Point organically combines, while avoids the shortcomings that efficiency originally brought declines, stall flutter nargin is reduced, and inverted " C " word knot
Bottom sweepback in structure is effectively offset the centre-of gravity shift problem that top sweepforward is brought, and emphasis solves asking for security reliability
Topic.Superimposing thread molded line is accumulated using the aerofoil profile center of gravity of inverted " C " font composition, is allowed to produce the composite structure of sweepforward and sweepback, blade
Lower half use sweepforward Bionic Design using sweepback Bionic Design, the first half, and blade is in integrally preceding emargination, trailing edge convex structure,
The purer sweepforward of blade operational efficiency or pure sweepback are all greatly improved, and synchronously reduce blade vortex noise, and expand mistake
Fast surge margin, while emphasis solves the simple safety issue for plunderring type blade, reached efficiently, low noise, high safety this three
The good result that person takes into account.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the stereogram of the present invention.
Wherein：1st, blade, 2, blade root, 3, blade tip, 4, inverted " C " font center of gravity product superimposing thread, 5, airflow direction, 6, before matrix
Edge, 7, convex trailing edge, 8, flange-type petiole, 9, streamlined intensive aspect, 10, original center of gravity product superimposing thread.
Embodiment
In order to deepen the understanding of the present invention, below in conjunction with embodiment and accompanying drawing, the invention will be further described, should
Embodiment is only used for explaining the present invention, does not form the restriction to protection scope of the present invention.
As illustrated in fig. 1 and 2, a kind of super low noise bumps biomimetic type subway tunnel propeller fan movable vane piece of the invention,
It includes blade 1, blade tip 3 and blade root 2 positioned at the head and the tail of blade 1, from blade root 2 to being divided into several on the radial direction of blade tip 3
Section, the center of gravity product superimposing thread in each section are designed using inverted " C " font（The first half using multiple objective function it is orthogonal preferably obtained by before
Plunder pattern bar curve pattern, lower half using multiple objective function it is orthogonal preferably obtained by sweepback pattern bar curve pattern）, the blade
Leading edge is radially arranged the matrix leading edge 6 and convex trailing edge 7 of a number of fairing along airflow direction 5, and ring flange is provided with blade root 2
Type petiole 8, streamlined intensive aspect 9 is provided between blade 1 and flange-type petiole 8.
There is a matrix leading edge 6 and blade that convex trailing edge 7 is integrally arranged is in inverted " C " font.
Super low noise composite bionic type subway tunnel propeller fan movable vane piece of the present invention is calculated using the heredity of computer archipelago
Method --- the aerofoil profile of " Hicks-Henn shape functions method of perturbation " optimization design, lift and lift-drag ratio is far above is disclosed hair at present
The aerofoil profile of table, the relative thickness of airfoil are 5-13%, and blade profile is entirely through " the complete whole levels of three-dimensional flow field CFD design " technology and ECDC
" orthogonal preferred " method is designed calculating and formed, and material piece uses casting/reflectal or steel alloy material.
For the blade of the present invention from blade root 2 to several sections are divided on the radial direction of blade tip 3, the center of gravity product in each section is folded
Line 4 presses the composite design of inverted " C " font, blade inlet edge（Air inlet side）Gradually against incoming side with 5 since middle part of blade is up
Carry out a certain amount of inclination（The offset of original center of gravity product superimposing thread 10 is a before relative vane Bionic Design）, sweepforward design is formed,
And down start gradually to carry out a certain amount of inclination along direction of flow 5 in the middle part of blade inlet edge（It is former before relative vane Bionic Design
The offset of starting weight heart product superimposing thread 10 is b）, sweepback design is formed, blade is in integrally platycelous inverted " C " font structure, instead
" C words " type center of gravity product shape of superimposing thread 4 obtains through the orthogonal decision design of computer multiple objective function, and blade sweepforward offset a is with before
It is essentially identical to plunder offset b, simply in opposite direction, root of blade is provided with flange-type petiole 8 and is used to couple with the wheel hub of impeller,
So as to realize the adjustable design of blade angle degree, streamlined intensive aspect 9 is provided between blade 1 and flange-type petiole 8, ensures leaf
The strength character of piece in itself.
Bionical sweepforward is that its structure is applied to the aircraft wing by the mankind after the flight characteristics of wing of some birds is observed
Or in axial-flow fan blade, the generation of noise sound wave is postponed using phase difference of the Mach wave in sweepforward structure from wave source farther out, is made
Local noise is no longer overlapped, so as to reach the purpose of noise reduction.Simultaneously because the exhibition on buzzard-type wing points to wing root to flowing, greatly
Air-flow slave root portion first is from fundamentally overcoming tip stall problem, thus available lift increases, pneumatically during the angle of attack
Efficiency high, but its security deficiency.
Bionical sweepback is that principle is similar with sweepforward, but the exhibition on swept-back wing is directed to wing tip to flowing, in sweepback structure
The Mach wave phase difference remote from wave source has equally postponed the generation of noise sound wave（It is but near with respect to sweepforward）, air-flow is first during the big angle of attack
First separated from wing tip, so as to overcome root stall problem, thus its available lift is big, and pneumatic efficiency is high, while also more pacifies
Quan Xing.But the nargin of stall proof surge is than sweepforward type deficiency.
The advantages of inverted " C " shaped blade of design fully utilizes sweepforward and sweepback is plunderred using composite bionic, it is very ingenious
Ground avoids the defects of sweepforward stress increase, in blade from blade root to blade tip by forming the reverse vortex pair of suitable intensity to border
Layer carries out momentum-transport, while reduces blade and open up the tangential suction gradient into plane, flowing is still shown as in advanced stall
Attachment state, so as to suppress fluid separation to a certain extent.
The sweepforward design of the blade first half increases the static pressure gradient distribution at blade root leaf top simultaneously, and it is advantageously formed
The radial direction static pressure gradient in the middle part of leaf road is pointed to, the accumulation of low energy fluid at impeller ring wall can be reduced, improve the interior stream of movable vane piece
Structure, make the purer sweepforward structure lifting 3-5% of operational efficiency of blade.
Stall when the sweepback design of blade lower half avoids the big angle of attack while noise is reduced produces, and makes its lift
Rise, while its sweepback offset b counteracts first half sweepforward offset a, therefore generally there is no centre-of gravity shift power for blade
Square produces, and makes blade entirety stressing conditions and conventional straight torsion type blade basically identical, so as to solve pure sweepforward blade security
The significant problem of deficiency.
Composite bionic inverted " C " font wind motor leaf chip architecture also plays the role of positive for noise reduction in itself：This is
Due to the presence of blade pressure surface and suction surface pressure difference, during air-flow flows from pressure towards suction surface, due in blade
Special platycelous structure, each section is no longer overlapping in the axial location of leading edge and trailing edge, air-flow and blade matrix
Front edge side and convex rear side surface wall no longer interfere generation vortex, and then the production of the crunch pulsation avoided
It is raw.The reduction that sound source of the dipole item in FW-H equations can be seen that airfoil surface pressure fluctuation can reduce dipole source
Intensity.
In summary factor, the purer sweepforward blade of composite bionic type blower blade noise reduce 1.5dB (A) left and right, than
Pure straight torsion type blade reduces 4.5dB (A) left and right, it is achieved thereby that the target of super low noise.
Wing tip vortex shedding and its tip stall phenomenon of induction also substantially weaken simultaneously, and aerofoil profile dynamic stall characteristic also obtains
Improve to a certain degree, and delayed low discharge state downstream obstruction along the high synergistic effect of leaf, by the stall flutter of blade
Area reduction 10-15%.
Composite bionic inverted " C " font wind motor leaf chip architecture, effectively reduces big angle of attack Airfoil flow separation phenomenon,
Stall angle is set to increase about 40%, and stalling characteristics become quite gentle；The maximum increase of the pneumatic lift-drag ratio of aerofoil profile is up to 50%, resistance
It is corresponding to reduce；Wing tip vortex shedding and its tip stall phenomenon of induction also substantially weaken；Aerofoil profile dynamic stall characteristic also obtains one
Determine degree improvement.
By the integrated application of above technical measures, composite bionic type subway/tunnel propeller fan movable vane is realized
The super low noise requirement of piece, the purer straight torsion type blade of final blade noise reduce 4.5dB (A) left and right, and efficiency improves 3-5%, stall
Reduce 10-15% in surge area.And synchronously meet the requirement of vane efficiency and security.
Therefore, after subway/tunnel propeller fan takes composite bionic inverted " C " font blower blade to design, blade
The purer sweepforward type of operational efficiency be greatly improved, while simultaneously synchronously reduce the eddy current crack of blade, and improve peace
Full reliability, reached efficiently, the good result taken into account of low noise, high safety this three.
Claims (3)
- A kind of 1. super low noise bumps biomimetic type subway tunnel propeller fan movable vane piece, it is characterised in that：It includes blade, position Blade tip and blade root in the blade head and the tail, several sections, each section are divided into from the blade root to the radial direction of blade tip Center of gravity product superimposing thread the compound arrangement of sweepforward is added using sweepback, the blade is in inverted " C " shape in the direction of the air flow, the leaf Flange-type petiole is provided with root, streamlined intensive aspect is provided between blade and the flange-type petiole.
- 2. a kind of super low noise bumps biomimetic type subway tunnel propeller fan movable vane piece according to claim 1, it is special Sign is：The blade inlet edge is radially arranged the matrix leading edge and convex trailing edge of a number of fairing along airflow direction.
- 3. a kind of super low noise bumps biomimetic type subway tunnel propeller fan movable vane piece according to claim 2, it is special Sign is：It is in inverted " C " font with the blade that matrix leading edge and convex trailing edge are integrally arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710702157.2A CN107355426A (en) | 2017-08-16 | 2017-08-16 | A kind of super low noise bumps biomimetic type subway tunnel propeller fan movable vane piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710702157.2A CN107355426A (en) | 2017-08-16 | 2017-08-16 | A kind of super low noise bumps biomimetic type subway tunnel propeller fan movable vane piece |
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| Publication Number | Publication Date |
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| CN107355426A true CN107355426A (en) | 2017-11-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710702157.2A Pending CN107355426A (en) | 2017-08-16 | 2017-08-16 | A kind of super low noise bumps biomimetic type subway tunnel propeller fan movable vane piece |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285094A (en) * | 2019-07-24 | 2019-09-27 | 陕西金翼通风科技有限公司 | It is a kind of to plunder formula blade for the curved of axial flow blower |
| CN111894900A (en) * | 2020-08-26 | 2020-11-06 | 珠海格力电器股份有限公司 | Fan blade, fan blade impeller, fan assembly and air conditioning unit |
| CN111894899A (en) * | 2020-08-26 | 2020-11-06 | 珠海格力电器股份有限公司 | Fan blade, fan blade impeller, fan assembly and air conditioning equipment |
| CN112283162A (en) * | 2020-12-24 | 2021-01-29 | 中国航发上海商用航空发动机制造有限责任公司 | Compressor rotor blade and design method thereof |
| CN112283161A (en) * | 2020-12-24 | 2021-01-29 | 中国航发上海商用航空发动机制造有限责任公司 | Axial compressor and compressor rotor blade thereof |
| CN114962342A (en) * | 2022-05-27 | 2022-08-30 | 哈尔滨工程大学 | Compressor tip area vibration structure |
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| CN207212756U (en) * | 2017-08-16 | 2018-04-10 | 江苏中联风能机械股份有限公司 | A kind of super low noise bumps biomimetic type subway tunnel propeller fan movable vane piece |
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| CN1039874A (en) * | 1988-07-28 | 1990-02-21 | 四川重庆永荣矿务局 | Hyperbola variable cross-section blade |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285094A (en) * | 2019-07-24 | 2019-09-27 | 陕西金翼通风科技有限公司 | It is a kind of to plunder formula blade for the curved of axial flow blower |
| CN111894900A (en) * | 2020-08-26 | 2020-11-06 | 珠海格力电器股份有限公司 | Fan blade, fan blade impeller, fan assembly and air conditioning unit |
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| CN111894900B (en) * | 2020-08-26 | 2022-01-28 | 珠海格力电器股份有限公司 | Fan blade, fan blade impeller, fan assembly and air conditioning unit |
| CN112283162A (en) * | 2020-12-24 | 2021-01-29 | 中国航发上海商用航空发动机制造有限责任公司 | Compressor rotor blade and design method thereof |
| CN112283161A (en) * | 2020-12-24 | 2021-01-29 | 中国航发上海商用航空发动机制造有限责任公司 | Axial compressor and compressor rotor blade thereof |
| CN112283161B (en) * | 2020-12-24 | 2021-03-16 | 中国航发上海商用航空发动机制造有限责任公司 | Axial compressor and compressor rotor blade thereof |
| CN112283162B (en) * | 2020-12-24 | 2021-03-26 | 中国航发上海商用航空发动机制造有限责任公司 | Compressor rotor blade and design method thereof |
| CN114962342A (en) * | 2022-05-27 | 2022-08-30 | 哈尔滨工程大学 | Compressor tip area vibration structure |
| CN114962342B (en) * | 2022-05-27 | 2024-04-02 | 哈尔滨工程大学 | Compressor end region vibration structure |
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