CN102032212A - Axial fan blade - Google Patents
Axial fan blade Download PDFInfo
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- CN102032212A CN102032212A CN 201010610261 CN201010610261A CN102032212A CN 102032212 A CN102032212 A CN 102032212A CN 201010610261 CN201010610261 CN 201010610261 CN 201010610261 A CN201010610261 A CN 201010610261A CN 102032212 A CN102032212 A CN 102032212A
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- blade
- fan
- axial
- air holes
- pore
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Abstract
The invention provides an axial fan blade. A plurality of air holes are arrayed along the chord length direction of the blade at the blade tip of the blade, wherein the direction of the air holes is vertical to the chordwise surface of the blade; the aperture of the air holes is 1 to 5mm; the depth of the air holes is 3 to 20mm; and the distance from the air holes to the edge of the blade is 1 to 4mm. Compared with the prior art, the axial fan blade can effectively avoid scraping and collision between the blade and a cylinder body, which break the blade and then damage a fan, also can effectively reduce the leakage amount of air through radial clearances along the axial direction, improves the aerodynamic efficiency of the fan and has the advantages of simple machining and low manufacturing cost.
Description
Technical field
The present invention relates to the axial-flow blower field, specifically is a kind of axial fan blade.
Background technique
Blower fan is ventilation equipment, and axial-flow blower is the blower fan that a class is important and amount is big, and a large amount of axial-flow blowers that use are brought into play its dust removal by ventilation effect in colliery, mine, tunnel, chemical industry, the energy, textile industry.
In order to prevent the scraping and the collision of axial-flow fan blade and blower fan cylinder inboard wall, between fan blade top and blower fan cylindrical shell, leave radial clearance.Radial clearance is big more, fan blade is just more little to the probability of the scraping of blower fan cylindrical shell and collision, but radial clearance is big more, gas loss of pressure head just big more by the hydrodynamic noise that leakage rate is just big more, the gap forms of radial clearance vertically, blower fan is just big more, fan efficiency is just low more, therefore, radial clearance between axial-flow fan blade top and the blower fan cylindrical shell often is controlled at very little scope, is about between the 2-15mm.Yet, so little radial clearance, just exist inadequate natural endowment, its redundancy is little, because blower fan in carrying or in installation or in use, the collision of blower fan cylindrical shell and exterior object can occur unavoidably, will make the blower fan barrel distortion like this, thereby make radial clearance between axial-flow fan blade top and the blower fan cylindrical shell less than design load, occur vane tip scraping and collision blower fan cylindrical shell easily.In addition, blade is subjected to centrifugal action because blower fan is in operation, and causes that the variation of blade creep stress may cause fan blade to stretch, and the appearance of these situations all can make blade scraping and collision blower fan cylindrical shell when fan operation, thereby causes blade broken.One or more groups blade is housed on the impeller of axial-flow blower, every group of blade nearly ten several, behind certain blade broken, will collide on the blade of other high speed rotary, thereby cause fan blade to be fractureed, just cause fan operation fault and blower fan to scrap thus by chain.The blower fan of dust removal by ventilation is stopped transport and is forced to the shutdown of associated production device again, pauses thereby make to produce.
Publication number is 200310113372.7 patent, discloses a kind of axial-flow blower that has the blade tip treatment device, and it adopts a kind of mode that adds treatment device on the leaf top, reduces the radial clearance between leaf top and cylindrical shell, promotes pneumatic efficiency.But this leaf top treatment device is installed trouble, and it is higher to use cost.If the discomfort of adjusting, the friction between leaf top and the cylindrical shell easily causes leaf destruction, and the sealing between impeller and cylindrical shell is not good, and air loss is also bigger.
Should guarantee that the radial clearance between vane tip and the blower fan cylindrical shell is very little, cause blade broken in the time of can not working as blade scraping blower fan cylindrical shell again, this is this patent problem that will solve just.
Summary of the invention
To axial-flow fan blade, cause the problem of blade broken when swiping the blower fan cylindrical shell for preventing blade, the present invention proposes a kind of axial fan blade.
The technical solution used in the present invention is that the chord length direction along blade is placed with several pores at the blade tip place of blade, the direction of this pore perpendicular to chord of blade to the surface.The aperture of pore is 1-5mm, and the degree of depth of pore is 3-20mm.The distance of the edge of airflow hole and blade is 1-4mm.
Compared with prior art, the good effect that the present invention is produced technically is: the first, punch at vane tip, make it become cellular structure, reduced the rigidity of vane tip, make that plastic deformation only takes place this vane tip when blade and cylindrical shell generation scraping, avoid this blade to fracture thereby played; It two is, if swipe between common blade generation vane tip and the cylindrical shell, strong frictional heat sharply raises the temperature of vane tip, melted by heat can partly appear in vane tip, and the metal viscosity of thawing will hinder the relative movement of blade and cylindrical shell, and this can make the probability of leaf destruction significantly improve, and for containing cellular structure in its leaf top of blade, the metal that can utilize honeycomb hole to absorb to melt has reduced this harm, thereby has reduced the probability of blade broken; It three is that the cellular structure on leaf top is similar to the straight-through type labyrinth, can obviously reduce gas vertically by the leakage rate of radial clearance, plays the seal action to the blower fan radial clearance, thereby improves the pneumatic efficiency of blower fan.This shows, the cellular structure of vane tip, thereby not only can avoid blade and cylindrical shell to scrape the harm that sidewipe collision causes blade broken that blower fan is caused effectively, can also reduce simultaneously the gas leakage rate by radial clearance vertically effectively, improve the pneumatic efficiency of blower fan, and process simple, advantage of low manufacturing cost in addition.
Description of drawings
Fig. 1 is the schematic representation of blade installation in the axial-flow blower,
Fig. 2 is the axial-flow fan blade plan view with top cellular structure,
Fig. 3 is the sectional view with axial-flow fan blade of top cellular structure.Wherein:
1. limit 7. pores surplus blower fan cylindrical shell 2. radial clearances 3. blade tips 4. blades 5. petioles 6.
Embodiment
Now in conjunction with the accompanying drawings 1, accompanying drawing 2 and 3 couples of the present invention of accompanying drawing are further described:
Embodiment one
Present embodiment is the leachy axial-flow fan blade of leaf tip, and blade 4 is cast with aluminum alloy material and formed, and the width of blade 3 is 150mm, and length of blade is 400mm.Chord length direction at blade tip 3 places of blade 4 along blade is placed with some pores 7, and this pore 7 is a blind hole, and its direction is perpendicular to blade 4 tangential surfaces, and the distance between the adjacent holes is 3mm, makes not have between the Kong Yukong to be communicated with.The aperture of pore 7 is 1mm, and the degree of depth of pore 7 is 3mm.Pore 7 leaves surplus limit 6 with the edge of blade tip 3 end faces, and this surplus limit 6 is 1mm.
Embodiment two
Present embodiment is the leachy axial-flow fan blade of leaf tip, and blade 4 is cast with aluminum alloy material and formed, and the width of blade 3 is 150mm, and length of blade is 450mm.Chord length direction at blade tip 3 places of blade 4 along blade is placed with some pores 7, and this pore 7 is a blind hole, and its direction is perpendicular to blade 4 tangential surfaces, and the distance between the adjacent holes is 3mm, makes not have between the Kong Yukong to be communicated with.The aperture of pore 7 is 3mm, and the degree of depth of pore 7 is 10mm.Pore 7 leaves surplus limit 6 with the edge of blade tip 3 end faces, and this surplus limit 6 is 2mm.
Embodiment three
Present embodiment is the leachy axial-flow fan blade of leaf tip, and blade 4 is cast with aluminum alloy material and formed, and the width of blade 3 is 180mm, and length of blade is 500mm.Chord length direction at blade tip 3 places of blade 4 along blade is placed with some pores 7, and this pore 7 is a blind hole, and its direction is perpendicular to blade 4 tangential surfaces, and the distance between the adjacent holes is 3mm, makes not have between the Kong Yukong to be communicated with.The aperture of pore 7 is 5mm, and the degree of depth of pore 7 is 20mm.Pore 7 leaves surplus limit 6 with the edge of blade tip 3 end faces, and this surplus limit 6 is 4mm.
Claims (1)
1. an axial fan blade is characterized in that, locate to be placed with some pores (7) at the blade tip (3) of blade (4) along the chord length direction of blade, the direction of this pore (7) perpendicular to chord of blade to the surface; The aperture of pore (7) is 1-5mm, and the degree of depth of pore (7) is 3-20mm; Pore (7) is 1-4mm with the distance of the edge of blade (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010610261 CN102032212A (en) | 2010-12-23 | 2010-12-23 | Axial fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010610261 CN102032212A (en) | 2010-12-23 | 2010-12-23 | Axial fan blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102032212A true CN102032212A (en) | 2011-04-27 |
Family
ID=43885523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010610261 Pending CN102032212A (en) | 2010-12-23 | 2010-12-23 | Axial fan blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102032212A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000265996A (en) * | 1999-03-18 | 2000-09-26 | Daikin Ind Ltd | Impeller for blower |
| CN2791444Y (en) * | 2004-08-12 | 2006-06-28 | 深圳市风百胜风机制造有限公司 | Hollow aerofoil fan vane section with central shafthole |
| CN101649844A (en) * | 2009-09-09 | 2010-02-17 | 北京戴诺新思动力技术有限公司 | Fan blade based on hollow metal/composite material structure |
| US20100119372A1 (en) * | 2008-11-13 | 2010-05-13 | Honeywell International Inc. | Cooled component with a featured surface and related manufacturing method |
| CN201916249U (en) * | 2010-12-23 | 2011-08-03 | 西北工业大学 | Axial-flow blower blade with interior being in honeycomb shape |
-
2010
- 2010-12-23 CN CN 201010610261 patent/CN102032212A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000265996A (en) * | 1999-03-18 | 2000-09-26 | Daikin Ind Ltd | Impeller for blower |
| CN2791444Y (en) * | 2004-08-12 | 2006-06-28 | 深圳市风百胜风机制造有限公司 | Hollow aerofoil fan vane section with central shafthole |
| US20100119372A1 (en) * | 2008-11-13 | 2010-05-13 | Honeywell International Inc. | Cooled component with a featured surface and related manufacturing method |
| CN101649844A (en) * | 2009-09-09 | 2010-02-17 | 北京戴诺新思动力技术有限公司 | Fan blade based on hollow metal/composite material structure |
| CN201916249U (en) * | 2010-12-23 | 2011-08-03 | 西北工业大学 | Axial-flow blower blade with interior being in honeycomb shape |
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| PB01 | Publication | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110427 |