CN102251986A - Bionic centrifugal fan blade and impeller - Google Patents

Bionic centrifugal fan blade and impeller Download PDF

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Publication number
CN102251986A
CN102251986A CN2011102468309A CN201110246830A CN102251986A CN 102251986 A CN102251986 A CN 102251986A CN 2011102468309 A CN2011102468309 A CN 2011102468309A CN 201110246830 A CN201110246830 A CN 201110246830A CN 102251986 A CN102251986 A CN 102251986A
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China
Prior art keywords
blade
fan blade
groove
centrifugal fan
bionic
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CN2011102468309A
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Chinese (zh)
Inventor
刘庆平
韩志武
任露泉
施云蛟
朱广宇
张俊秋
陈坤
廖庚华
杨莹
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Jilin University
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Jilin University
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Priority to CN2011102468309A priority Critical patent/CN102251986A/en
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Abstract

The invention discloses a bionic centrifugal fan blade and a bionic centrifugal fan impeller. The surface of the pressure side of the bionic centrifugal fan blade is provided with an annular groove, and the front edge and the rear edge of the blade are provided with triangular saw-tooth structures corresponding to the groove; and the bionic centrifugal fan impeller consists of a front disc, at least two blades and a rear disc, wherein the blades are welded and molded with the front disc and the rear disc respectively, the rear disc has an annular structure, the blade is provided with the pressure side, the other side of the blade is a suction side, the surface of the pressure side of the blade is provided with the annular groove, and the front edge and the rear edge of the blade are provided with the triangular saw-tooth structures corresponding to the groove. The groove of the bionic centrifugal fan blade can improve the flowing condition of airflow and reduce the abrasion of fluid medium granules on the blade; and the saw-tooth structures at the front and rear edges of the blade can reduce the separation pulse of the airflow, reduce the resistance of the separated suddenly-changed airflow, improve the conversion efficiency of the blade and reduce the pneumatic noise of the blade.

Description

A kind of bionical centrifugal fan blade and impeller thereof
Technical field
The present invention relates to a kind of bionical centrifugal blower, particularly a kind of bionical centrifugal fan blade and impeller.
Background technique
Centrifugal fan is widely used in metallurgy, building materials, power industry, is the power consumption of these enterprises, accounts for 21% of enterprise's total power consumption.Contain more particulate matter such as flue dust in the gas that blower fan is carried in these industries simultaneously, cause fan blade to wear and tear fast.Therefore improving fan efficiency, increase the blade wear resistance, is the problem that the blower fan industry continues solution.
In order to improve fan efficiency, must improve blade and promote ability, reduce the air current flow loss.Up-to-date fan blade technology is to adopt the ternary twisted blade at present, and the curve form of this blade can better meet the flowing law of air-flow in blower fan inside.But the three-dimensional flow blade is complicated space curved surface, and the existing bending of spoon of blade is reversed again, and technology capability is poor, and manufacture cost increases.Therefore the binary blade is still the principal mode of present centrifugal fan blade.Binary blade commonly used is a smooth surface, when air-flow flows at blade surface, can produce bigger frictional loss, and because the difference of blade shape and mobile trace, and it is bigger to make air-flow overflow loss.
The blower fan of in containing the soot dust granule medium, working, serious wearing and tearing can take place owing to be subjected to the impact of high-velocity particles in its blade, serious even some months blade just because wearing and tearing scrap.The technology that improves at present the blade wear resistance mainly is passive wear-proof technique, as in the blade surface built-up welding, at blade surface ceramic layer is set, applies wear-resistant paint etc.Though these passive wear-proof techniques have improved the blade wear resistance, have increased cost of production, and need periodic maintenance, have also increased user cost.
Through retrieval, China utility model patent ZL201020032042.0, " a kind of draught fan impeller " disclosed, this patent adopts at fan blade and pastes the dovetail ceramic block in the embedding of position, windward side, fan blade pastes L type ceramic block with the weld joint that engages of hub disk along the molded lines embedding of fan blade, the intake grill wheel hub of fan blade is equipped with U type ceramic block, and the ultra-thin ceramic piece is pasted in the back backplate embedding of fan blade.By this method, though improved the wear resistance of blade to a certain extent, this method complex process, cost of production increases more, and wearing and tearing back ceramic block comes off easily.
Through retrieval, Chinese invention patent application number: 201010129447.0, a kind of " centrifugal fan blade " disclosed, the described fan blade of this patent adopts the antecurvature structure of thickening degree, the pressure side of blade and suction surface adopt the control of high-order Bezier, under the small flow situation, can guarantee higher voltage rise, improve the flow passage situation, reduce energy loss and increase work efficiency.The spoon of blade that this method adopts is complex-shaped, and the processing difficulties cost increases, and only is adapted at using down than small flow.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, and the impeller of a kind of bionical centrifugal fan blade and the bionical centrifugal fan blade of use is provided, the present invention can improve fun for inner efficiency, increases the blade wear resistance, and reduces the fan operation noise.Fan blade pressure side surface is provided with annular groove, blade inlet edge and trailing edge are provided with and the corresponding trigonometric form saw tooth structure of groove, the groove of this blade can improve air flow status, reduce of the wearing and tearing of flowing medium particulate matter to blade, the zigzag structure of blade front and rear edge can reduce the airflow breakaway pulsation, reduces and separates the sudden change gas-flow resistance, improve the blade conversion efficiency, reduce the blade aerodynamic noise.
Design philosophy of the present invention is from a kind of shell surface striated structure, as shown in Figure 1.The shell surface striated structure is carried out signature analysis, extract the characteristic element of striated structure, and be that target is optimized test, determined to make the Bionic Design scheme that fan blade efficient improves, noise reduces and wear resistance improves with efficient, noise and wear resistance.
The present invention's bionical centrifugal fan blade is to be provided with annular groove on fan blade pressure side surface, and blade inlet edge and trailing edge are provided with and the corresponding trigonometric form saw tooth structure of groove.
The present invention's bionical centrifugal blower fan blade wheel is made up of shroud, two blades and hub disk at least, blade respectively with shroud and hub disk welding fabrication, hub disk is a circular ring, blade has pressure side, the another side that blade is inhaled is a suction surface, the blade pressure surface surface is provided with annular groove, and blade inlet edge and trailing edge are provided with and the corresponding trigonometric form saw tooth structure of groove.
The groove of bionical centrifugal fan blade can improve air flow status, reduces the wearing and tearing of flowing medium particulate matter to blade, the zigzag structure of blade front and rear edges, can reduce the airflow breakaway pulsation, reduce and separate the sudden change gas-flow resistance, improve the blade conversion efficiency, reduce the blade aerodynamic noise.
The invention has the beneficial effects as follows:
The present invention utilizes the bionical striated structure of blade surface, has reduced the axial flow of air-flow, impels air-flow from axially changing to direction radially, has improved the blade conversion efficiency; Groove structure impels the particulate matter discretization in the fluid simultaneously, has reduced particulate matter and has converged degree, has reduced the erosive wear of particulate matter to blade surface; The zigzag structure of blade edge has reduced the come off voorticity at edge of air-flow, makes and separates the vortex discretization, has reduced the airflow breakaway noise.Blade structure of the present invention can be by impact briquetting, and cost increases few.The present invention has improved blade efficiency, has increased the blade wear resistance, has reduced running noises.
Description of drawings
Fig. 1 is the striated surface structural representation of bionical prototype shell.
Fig. 2 is the plan view of the present invention's impeller.
Fig. 3 is the B-B sectional view among Fig. 2.
Fig. 4, Fig. 5 and Fig. 6 are the setting angle schematic representation of the present invention's blade.
Fig. 7 is the structural parameter schematic representation of the present invention's impeller.
Fig. 8 is the shroud structural representation of the present invention's impeller.
Fig. 9 is the present invention's a blade structure schematic representation.
Figure 10 is the A-A sectional view among Fig. 7.
Figure 11 is the zigzag structure enlarged diagram of the trailing edge at I place among Fig. 7.
Figure 12 is the zigzag structure enlarged diagram of the blade inlet edge at II place among Fig. 7.
Figure 13 is the hub disk plan view of the present invention's impeller.
Figure 14 is the hub disk right elevation of the present invention's impeller.
Embodiment
As shown in Figure 2, impeller of the present invention comprises shroud 1, blade 2 and hub disk 3, blade 2 quantity are no less than three, blade 2 respectively with shroud 1 and hub disk 3 welding fabrications, blade 2 has pressure side 5, and the another side of blade suction 2 is a suction surface 4, the tangent line angle β of blade 2 and impeller outer edge, can become 90 °, as shown in Figure 4; Also can be greater than 90 °, it is worth between 90 °～135 °, as shown in Figure 5; Also can be less than 90 °, it is worth between 45 °～90 °, as shown in Figure 6.
Shroud 1 is the annulus of horn mouth shape, and internal radius D1 is 500mm～2000mm, and the annulus external diameter is D2, and the annulus section is circular, and circular radius is R1, and as shown in Figure 7 and Figure 8, annulus cross sectional radius R1 is 0.2D1～0.5D1; Annulus outer diameter D 2 is 1.2 * D1～1.5 * D1; Shroud 1 height equals B2-B1 by impeller height B1 and B2 decision.
Blade 2 is the structure of approximate trapezoid, and the height of blade 2 equals half of difference of impeller outer diameter D2 and profile ID D1 again divided by the sine of blade tilt, i.e. (D2-D1)/(2 * sin β).As Fig. 7, Fig. 9 and shown in Figure 10, the pressure side 5 of blade 2 is provided with groove 6, and the trend of groove 6 is circular, and circular radius R2 and impeller shroud radius R 1 are concentric circle, and circular radius R2 represents a series of groove concentric circle radius here.Groove 6 sections are triangle, and leg-of-mutton height H=(D1/450)+1.2, the value of height H is 2.2mm～10mm, and the projected length of triangle hypotenuse on the base is W1 and W2, W1=W2=2 * H.Blade 2 width B 1=0.2D1-0.35D1, blade 2 width B 2=1.05B1-1.35B1.Triangle can have fillet between each limit, and fillet radius is got 1/10 to 1/5 of the length of side.
Blade 2 leading edges (being positioned on the profile ID) and trailing edge (being positioned on the impeller outer diameter) are provided with sawtooth 7 shape structures, sawtooth 7 is a triangle, the height of blade 2 leading edge dog-tooths 7 is L1, the height of blade 2 trailing edge serrations 7 is L2, L1=0.8 * L2=1.2 * H, triangle can have fillet between each limit, and fillet radius is got 1/10～1/5 of the length of side.As Fig. 9, Figure 10, Figure 11 and shown in Figure 12.
As Figure 13 and shown in Figure 14, impeller hub disk 3 is a circular ring, and its internal diameter is D1, and external diameter is D2, and disc thickness is determined according to structure.

Claims (6)

1. bionical centrifugal fan blade, it is characterized in that: be provided with annular groove on fan blade pressure side surface, blade inlet edge and trailing edge are provided with and the corresponding trigonometric form saw tooth structure of groove.
2. a kind of bionical centrifugal fan blade according to claim 1 is characterized in that: the section of described groove is a triangle.
3. a kind of bionical centrifugal fan blade according to claim 1 and 2 is characterized in that: the circular radius of described groove and impeller shroud radius are concentric circle.
4. bionical centrifugal blower fan blade wheel, it is characterized in that: form by shroud, at least two blades and hub disk, blade respectively with shroud and hub disk welding fabrication, blade has pressure side, the another side that blade is inhaled is a suction surface, the blade pressure surface surface is provided with annular groove, and blade inlet edge and trailing edge are provided with and the corresponding trigonometric form saw tooth structure of groove.
5. a kind of bionical centrifugal blower fan blade wheel according to claim 4 is characterized in that: the section of described groove is a triangle.
6. according to claim 4 or 5 described a kind of bionical centrifugal blower fan blade wheels, it is characterized in that: the circular radius of described groove and impeller shroud radius are concentric circle.
CN2011102468309A 2011-08-26 2011-08-26 Bionic centrifugal fan blade and impeller Pending CN102251986A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103696985A (en) * 2013-11-30 2014-04-02 宁波方太厨具有限公司 Centrifugal fan impeller
CN104100570A (en) * 2014-07-09 2014-10-15 德意电器股份有限公司 Bionic impeller for exhaust hood
CN104251231A (en) * 2013-06-28 2014-12-31 苏州宝时得电动工具有限公司 Centrifugal impeller and blowing and inducing device comprising same
CN104500444A (en) * 2014-12-24 2015-04-08 吉林大学 Bionic erosion-resistant and efficient centrifugal fan blade
CN105020175A (en) * 2015-08-20 2015-11-04 莱克电气股份有限公司 Rotor impeller and motor with same
CN105134650A (en) * 2015-09-23 2015-12-09 华帝股份有限公司 Novel range hood impeller
CN105201906A (en) * 2015-08-20 2015-12-30 莱克电气股份有限公司 Fixed impeller and motor using same
CN105658038A (en) * 2016-03-18 2016-06-08 联想(北京)有限公司 Radiating device and electronic equipment
CN106285901A (en) * 2016-11-08 2017-01-04 吉林大学 A kind of vehicular engine radiator fan based on the exploitation of owl wing plumage
CN106402021A (en) * 2016-10-31 2017-02-15 中车株洲电力机车有限公司 Impeller of centrifugal fan
CN107023515A (en) * 2017-06-16 2017-08-08 吉林大学 A kind of low noise axial fan composite bionic airfoil fan
CN107076164A (en) * 2014-10-30 2017-08-18 三菱电机株式会社 Turbofan and conditioner indoor set
CN109236731A (en) * 2018-10-18 2019-01-18 江苏大学 A kind of wear-resistant blade based on coupling bionic optimization
CN109538528A (en) * 2019-01-30 2019-03-29 吉林大学 A kind of centrifugal fan impeller
CN114738054A (en) * 2022-05-20 2022-07-12 西北工业大学 Design method of bionic turbine blade of aero-engine

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104251231A (en) * 2013-06-28 2014-12-31 苏州宝时得电动工具有限公司 Centrifugal impeller and blowing and inducing device comprising same
CN103696985A (en) * 2013-11-30 2014-04-02 宁波方太厨具有限公司 Centrifugal fan impeller
CN104100570A (en) * 2014-07-09 2014-10-15 德意电器股份有限公司 Bionic impeller for exhaust hood
CN107076164A (en) * 2014-10-30 2017-08-18 三菱电机株式会社 Turbofan and conditioner indoor set
CN104500444A (en) * 2014-12-24 2015-04-08 吉林大学 Bionic erosion-resistant and efficient centrifugal fan blade
CN105020175A (en) * 2015-08-20 2015-11-04 莱克电气股份有限公司 Rotor impeller and motor with same
CN105201906A (en) * 2015-08-20 2015-12-30 莱克电气股份有限公司 Fixed impeller and motor using same
CN105134650A (en) * 2015-09-23 2015-12-09 华帝股份有限公司 Novel range hood impeller
CN105658038A (en) * 2016-03-18 2016-06-08 联想(北京)有限公司 Radiating device and electronic equipment
CN106402021A (en) * 2016-10-31 2017-02-15 中车株洲电力机车有限公司 Impeller of centrifugal fan
CN106402021B (en) * 2016-10-31 2019-11-12 中车株洲电力机车有限公司 A kind of centrifugal blower fan blade wheel
CN106285901A (en) * 2016-11-08 2017-01-04 吉林大学 A kind of vehicular engine radiator fan based on the exploitation of owl wing plumage
CN107023515B (en) * 2017-06-16 2019-04-05 吉林大学 A kind of low noise axial fan composite bionic airfoil fan
CN107023515A (en) * 2017-06-16 2017-08-08 吉林大学 A kind of low noise axial fan composite bionic airfoil fan
CN109236731A (en) * 2018-10-18 2019-01-18 江苏大学 A kind of wear-resistant blade based on coupling bionic optimization
CN109538528A (en) * 2019-01-30 2019-03-29 吉林大学 A kind of centrifugal fan impeller
CN114738054A (en) * 2022-05-20 2022-07-12 西北工业大学 Design method of bionic turbine blade of aero-engine
CN114738054B (en) * 2022-05-20 2023-05-02 西北工业大学 Design method of bionic turbine blade of aero-engine

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Application publication date: 20111123