CN201963598U - Axial flow bionic blade - Google Patents
Axial flow bionic blade Download PDFInfo
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- CN201963598U CN201963598U CN2011200000338U CN201120000033U CN201963598U CN 201963598 U CN201963598 U CN 201963598U CN 2011200000338 U CN2011200000338 U CN 2011200000338U CN 201120000033 U CN201120000033 U CN 201120000033U CN 201963598 U CN201963598 U CN 201963598U
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- blade
- axial flow
- bionical
- exhaust outlet
- flow according
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Abstract
The utility model relates to a high-efficiency, energy-saving and low-noise axial flow bionic blade which comprises a blade, wherein the tail of the blade is provided with a plurality of unequal sawteeth grooves, and the unequal sawteeth grooves are used for cutting and carding the large vortex generated at a wind outlet into innumerable small vortex and effectively separating and guiding the viscous flow at the fan blade root to form into ideal airflow. The blade has the advantages that after the FFT (fast fourier transform) noise software repeated test and demonstration, the fan with the structure of unequal-distant sawteeth can reduce the noise by about 1.5dB compared with the blade shape without the sawteeth structure and can reduce the noise by about 1dB compared with the blade shape with the sawteeth structure, thereby playing a part in optimizing the noise in a machine set of an axial flow fan.
Description
Technical field
The utility model relates to a kind of bionical blade of a kind of axial flow efficient, energy-conservation, low noise that has, and belongs to axial-flow fan blade and makes the field.
Background technique
CN201159203Y, title " a kind of low noise axial fan blade ", this blade is a sweepforward, is 20 °～35 ° acute angle shape; Blade radially all is being curve form with tangential both direction, each circumference tangent plane of blade is a wing blade, its relative thickness is 4%～12%, from leaf push up to blade root by Bao Jianhou, be provided with one or multi-channel leaf cutter on the surface of blade, blade is provided with the link that fixes with wheel hub, and main points are the rear edge of blade is made as corrugated curved sections structure.Its deficiency: the one, blade rear edge is the corrugated surface section, both can't cut effectively and be carded to countless little eddy current the maelstrom that wind outlet produces, also the viscosity air-flow to blade root effectively can't be separated, do not have the effect of guiding, can't form desirable air-flow, therefore usefulness is low, and noise is big.
The model utility content
Purpose of design: avoid the deficiency in the background technique, design a kind of bionical blade of a kind of axial flow of efficient, energy-conservation, low noise.
Design proposal: in order to realize above-mentioned purpose of design.The utility model is on structural design, fan blade adopts bionics--birds wing, open at the blade afterbody and not wait flexuose, be mainly under equal air quantity and reduce fan noise, the not equidistant zigzag fashion cutting of this scheme is carded to countless little eddy current to the maelstrom cutting that wind outlet produces on the one hand, on the other hand, viscosity air-flow to blade root effectively separates, leading role, and causing becomes desirable air-flow.In the theory of design tooth pitch arrange with the directivity of crown for crucial.Because blade is to adopt the new and effective sweepforward reaping hook of arc thin plate blade profile in design, by becoming circular rector negative exponent flow pattern, high coefficient of lift combined design, the blade external form is that sickle shaped is wide outside and narrow inside, the three dimensional space distorted shape, makes full use of the big characteristics of outer radius peripheral velocity, improves the acting ability of blade.Aspect tooth pitch, have by exhaust outlet blade tip to the gap of exhaust outlet leaf tail and to dredge to close, this be because the air-flow peripheral velocity at blade exit place, air-flow group size from high to low, descending, like this satisfy big gap cutting speed air flow group, little gap cutting low speed little airflow group; Aspect the crown direction, be flow direction decision according to air-flow--be that circumference is determined, blade exit place tooth mouth becomes 12 equidistant zigzag fashion to arrange, and tooth mouth inclination is little of expansion gradually great achievement 27～40 degree by exhaust outlet blade tip to exhaust outlet leaf tail.The tooth mouth degree of depth becomes not even depth distribution of 10--7---8 by exhaust outlet blade tip to exhaust outlet leaf tail.By above design point substantially can with the laddering organic synthesis of the main air flow of next blade, increase the exhaust outlet speed that necessarily detours, like this dry straight avoided the superior and the subordinate's air-flow in conjunction with the time collision of air-flow takes place and the eddy current loss that causes, thereby reach the purpose of noise, in addition after speed is detoured in increase, whole static pressure to blower fan has certain humidification, can remedy the total head value that blade loses because of saw-toothed shape.
Technological scheme: the bionical blade of a kind of axial flow, it comprises blade, have a plurality of serrated slot that do not wait at the blade afterbody, this not equidistant sawtooth cuts, is carded to countless little eddy current to the maelstrom that the air-out place produces, and the viscosity air-flow of fan blade root effectively separated, leads, causing becomes desirable air-flow.
The utility model is compared with background technique, the blower fan that adopts equidistant saw tooth structure not is after testing demonstration repeatedly by FFT noise software, compare the blade profile of no saw tooth structure own, noise can reduce about 1.5dB, and can reduce 1dB with respect to the blade profile of equidistant saw tooth structure, in the unit of axial-flow blower, played the effect of optimizing noise.
Description of drawings
Fig. 1 is the structural representation of the bionical blade of axial flow.
Embodiment
Embodiment 1: with reference to accompanying drawing 1.The bionical blade of a kind of axial flow, it comprises blade 1, having the size of a plurality of serrated slot 3(serrated slot that do not wait at blade 1 afterbody, each is unequal), this not equidistant sawtooth cuts, is carded to countless little eddy current to the maelstrom that the air-out place produces, and the viscosity air-flow of fan blade root effectively separated, leads, causing becomes desirable air-flow.Described blade adopts the new and effective sweepforward reaping hook of arc thin plate blade profile, by becoming circular rector negative exponent flow pattern, high coefficient of lift combined design, the blade external form is that sickle shaped is wide outside and narrow inside, the three dimensional space distorted shape, makes full use of the big characteristics of outer radius peripheral velocity, improves the acting ability of blade.Described blade angle 35 degree, the difference of internal diameter established angle are controlled at ± 2 degree between.Blade profile central point line is a three-dimensional curve on each turning radius of described blade, and angle of eccentricity is about 28 degree, and axial direction is upwards parabola.Described blade outer radius chord length is in 2.7 times of the inner radius, to have increased twice stiffening rib 2 on the blade.The ratio of each cross section chord length of described blade and radius of curvature is controlled between the 0.75-0.8.Described tooth pitch is had by exhaust outlet blade tip to the gap of exhaust outlet leaf tail and to dredge to close.Described tooth mouth inclination is little of expansion gradually great achievement 27～40 degree by exhaust outlet blade tip to exhaust outlet leaf tail, and the tooth mouth degree of depth becomes 10mm--7 mm by exhaust outlet blade tip to exhaust outlet leaf tail---8 mm not even depth distribute.
By CFD specialty fluid mechanics Aided Design, by the blade of this design characteristics efficient, energy-conservation, low noise are arranged, the main critical size of its blade profile is described: ⑴ blade angle 35 degree, the difference of internal diameter established angle are controlled at ± 2 degree between.⑵ blade profile central point line is a three-dimensional curve on each turning radius, and angle of eccentricity is about 28 degree, and axial direction is upwards parabola.⑶ outer radius chord length is in 2.7 times of the inner radius, to have increased the twice stiffening rib on the blade.⑷ the ratio of each cross section chord length and radius of curvature is controlled between the 0.75-0.8.The demonstration of test repeatedly through the airflow pressure test stand is improved, and can promote 10% Energy Efficiency Ratio than the fan blade of routine by the fan blade that becomes circular rector negative exponent flow pattern, high coefficient of lift combined design, has played critical effect aspect energy-conservation.
What need understand is: though the foregoing description is to the mentality of designing of the present utility model detailed text description of contrasting; but these text descriptions; just the utility model is established the simple text description of thinking; rather than to the restriction of the utility model mentality of designing; any combination, increase or modification that does not exceed the utility model mentality of designing all falls in the protection domain of the present utility model.
Claims (8)
1. bionical blade of axial flow, it comprises blade, it is characterized in that: have a plurality of serrated slot that do not wait at the blade afterbody, this not equidistant sawtooth cuts, is carded to countless little eddy current to the maelstrom that the air-out place produces, and the viscosity air-flow of fan blade root effectively separated, leads, causing becomes desirable air-flow.
2. the bionical blade of axial flow according to claim 1, it is characterized in that: described blade adopts the new and effective sweepforward reaping hook of arc thin plate blade profile, by becoming circular rector negative exponent flow pattern, high coefficient of lift combined design, the blade external form is that sickle shaped is wide outside and narrow inside, the three dimensional space distorted shape, make full use of the big characteristics of outer radius peripheral velocity, improve the acting ability of blade.
3. the bionical blade of axial flow according to claim 1 is characterized in that: described blade angle 35 degree, the difference of internal diameter established angle are controlled at ± 2 degree between.
4. the bionical blade of axial flow according to claim 1 is characterized in that: blade profile central point line is a three-dimensional curve on each turning radius of described blade, and angle of eccentricity is about 28 degree, and axial direction is upwards parabola.
5. the bionical blade of axial flow according to claim 1 is characterized in that: described blade outer radius chord length is in 2.7 times of the inner radius, to have increased the twice stiffening rib on the blade.
6. the bionical blade of axial flow according to claim 1 is characterized in that: the ratio of each cross section chord length of described blade and radius of curvature is controlled between the 0.75-0.8.
7. the bionical blade of axial flow according to claim 1 is characterized in that: described tooth pitch is had by exhaust outlet blade tip to the gap of exhaust outlet leaf tail and to dredge to close.
8. the bionical blade of axial flow according to claim 1, it is characterized in that: described tooth mouth inclination is little of expansion gradually great achievement 27～40 degree by exhaust outlet blade tip to exhaust outlet leaf tail, and the tooth mouth degree of depth becomes not even depth distribution of 10mm--7mm---8mm by exhaust outlet blade tip to exhaust outlet leaf tail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200000338U CN201963598U (en) | 2011-01-01 | 2011-01-01 | Axial flow bionic blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200000338U CN201963598U (en) | 2011-01-01 | 2011-01-01 | Axial flow bionic blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201963598U true CN201963598U (en) | 2011-09-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200000338U Expired - Fee Related CN201963598U (en) | 2011-01-01 | 2011-01-01 | Axial flow bionic blade |
Country Status (1)
| Country | Link |
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| CN (1) | CN201963598U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022381A (en) * | 2011-01-01 | 2011-04-20 | 杭州顿力电器有限公司 | Bionic axial-flow blade |
| CN102927046A (en) * | 2012-11-22 | 2013-02-13 | 威海克莱特菲尔风机股份有限公司 | Low-noise efficient impeller of axial-flow fan |
| CN102979764A (en) * | 2012-11-23 | 2013-03-20 | 杭州顿力电器有限公司 | Axial flow fan blade and fan |
| CN103292441A (en) * | 2013-06-25 | 2013-09-11 | 吉林大学 | Bionic noise-reducing air conditioner grid |
| CN103835995A (en) * | 2012-11-22 | 2014-06-04 | 威海克莱特菲尔风机股份有限公司 | Large axial flow impeller provided with blades with tooth-shaped front edges |
| CN108223445A (en) * | 2018-02-12 | 2018-06-29 | 浙江朗迪集团股份有限公司 | A kind of axial fan impeller |
-
2011
- 2011-01-01 CN CN2011200000338U patent/CN201963598U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022381A (en) * | 2011-01-01 | 2011-04-20 | 杭州顿力电器有限公司 | Bionic axial-flow blade |
| CN102022381B (en) * | 2011-01-01 | 2012-12-12 | 杭州顿力电器有限公司 | Bionic axial-flow blade |
| CN102927046A (en) * | 2012-11-22 | 2013-02-13 | 威海克莱特菲尔风机股份有限公司 | Low-noise efficient impeller of axial-flow fan |
| CN103835995A (en) * | 2012-11-22 | 2014-06-04 | 威海克莱特菲尔风机股份有限公司 | Large axial flow impeller provided with blades with tooth-shaped front edges |
| CN102927046B (en) * | 2012-11-22 | 2015-04-29 | 威海克莱特菲尔风机股份有限公司 | Low-noise efficient impeller of axial-flow fan |
| CN103835995B (en) * | 2012-11-22 | 2016-04-27 | 威海克莱特菲尔风机股份有限公司 | There is the large-scale axial-flow blower of profile of tooth leading edge blade |
| CN102979764A (en) * | 2012-11-23 | 2013-03-20 | 杭州顿力电器有限公司 | Axial flow fan blade and fan |
| CN103292441A (en) * | 2013-06-25 | 2013-09-11 | 吉林大学 | Bionic noise-reducing air conditioner grid |
| CN103292441B (en) * | 2013-06-25 | 2016-03-30 | 吉林大学 | Bionical noise reduction air conditioner grid |
| CN108223445A (en) * | 2018-02-12 | 2018-06-29 | 浙江朗迪集团股份有限公司 | A kind of axial fan impeller |
| CN108223445B (en) * | 2018-02-12 | 2023-12-29 | 宁波朗迪智能机电有限公司 | Impeller of axial flow fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20140101 |