CN204921414U - High -efficient sweepforward type subway tunnel axial fan - Google Patents
High -efficient sweepforward type subway tunnel axial fan Download PDFInfo
- Publication number
- CN204921414U CN204921414U CN201520587489.7U CN201520587489U CN204921414U CN 204921414 U CN204921414 U CN 204921414U CN 201520587489 U CN201520587489 U CN 201520587489U CN 204921414 U CN204921414 U CN 204921414U
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- CN
- China
- Prior art keywords
- blade
- sweepforward
- hub
- subway tunnel
- efficient
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- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a high -efficient sweepforward type subway tunnel axial fan, including dryer motor and the impeller interior with arranging the dryer in, the impeller includes a hub and follows hub periphery evenly distributed's a plurality of blade, a sweepforward point has on the leading edge tail end of blade, have a torsional angle of attack a between the apex of blade and the blade root, the a=5 -15 degree, the trailing edge thickness of blade is the 15 -12 of leading edge thickness, the blade root bottom of blade has an end and bends, the radian that the end is bent and the periphery phase -match of hub, the end that facings the wind of hub has one and is hemispherical cap awl. Through the optimal design to the blade shape and to the improvement of cap toper form, specific say so to add in the apex department of blade establish sweepforward point, apex and blade root and twist reverse, blade root department sets up the curved and hemispherical cap awl of end, the whole efficiency of messenger's fan improves greatly, has good economic benefits and social.
Description
Technical field
The utility model relates to a kind of axial-flow blower, particularly relates to a kind of efficient sweepforward type subway tunnel axial-flow blower for subway, tunnel ventilation.
Background technique
Along with the propelling of urban construction, metro project is all released in many large-and-medium size cities, simultaneously, in the construction of growing high-grade highway, high-speed railway, there is a large amount of subterranean tunnels in capital, and the subway tunnel ventilator requisite constituent element that is subterranean tunnel, be responsible for carrying out ventilation to the huge underground space.DTF type subway tunnel axial-flow blower is modal subway tunnel ventilator, similar with common axial fan, it is made up of air duct, impeller and motor three-major-items usually, and the wheel hub that impeller is cast by aluminum alloy is usually formed at the equally distributed blade of wheel money circle edge with several.By the impeller of three Dimensional CAD Design, there is higher efficiency, but for the subway tunnel ventilator of enormous amount, the efficiency often improving one percentage point all can bring huge economical, societal benefits, and for this reason, necessary design one has more high efficiency subway tunnel axial-flow blower.
Model utility content
For overcoming existing subway tunnel axial-flow blower efficiency defect high not enough, the utility model is intended to be set about by aspects such as blade design, wheel hub optimizations, provides a kind of subway tunnel axial-flow blower with extreme efficiency.
For achieving the above object, the technical solution adopted in the utility model is: a kind of efficient sweepforward type subway tunnel axial-flow blower, the motor comprising an air duct and be placed in air duct and impeller, described impeller comprises a wheel hub and several blades equally distributed along circumference of hub face, the leading edge tail end of described blade has a sweepforward point, there is between the blade tip of described blade and blade root an angle of attack a reversed, a=5-15 degree, the trailing edge thickness of described blade is the 1/5-1/2 of front edge thickness, it is curved that the blade root bottom of described blade has an end, the circumferential surface of the radian that described end is curved and wheel hub matches, the windward side of described wheel hub has one in hemispheric cap cone.
Have employed efficient sweepforward type subway tunnel axial-flow blower of the present utility model, by to the optimal design of blade shape and the improvement to cap cone-shaped, add sweepforward point, blade tip and blade root at the blade tip place of blade specifically to reverse, blade root place is arranged holds curved and hemispheric cap cone, the whole efficiency of blower fan is improved greatly, there is good economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is blade structure schematic diagram of the present utility model;
Fig. 3 is blade plan structure schematic diagram of the present utility model;
Fig. 4 is blade profile structural representation of the present utility model.
In figure: 1-air duct, 2-motor, 3-impeller, 4-wheel hub, 5-blade, 6-sweepforward point, 8-end is curved, and 9-cap is bored, 11-blade tip, 12-blade root, 13-trailing edge, 14-leading edge.
Embodiment
As shown in Figure 1, the utility model discloses a kind of efficient sweepforward type subway tunnel axial-flow blower, comprise an air duct 1 and the motor 2 be placed in air duct 1 and impeller 3, described impeller 3 comprises a wheel hub 4 and along wheel hub 4 circumferential surface several blades 5 equally distributed, usual blade 5 all adopts aluminium alloy compression casting mode to make, to facilitate the shape produced and have good aeroperformance with wheel hub 4.
As shown in Figure 2, leading edge 14 tail end that the innovative point of efficient sweepforward type subway tunnel axial-flow blower of the present utility model is mainly described blade 5 has a sweepforward point 6, the setting of sweepforward point 6, the blade tip 11 localized design angle of attack can be reduced, realize tip and subtract merit.Although tip local acting ability can be sacrificed, also can reduce the pressure reduction of suction, pressure side, effectively reduce the leakage flow in blade tip 11 gap, reduce aerodynamic loss, improve blower fan whole efficiency, and effectively improve the operating range of blower fan.Improve whole efficiency, and effectively reduce noise.
As shown in Figure 3, the innovative point of efficient sweepforward type subway tunnel axial-flow blower of the present utility model is also to have an angle of attack a reversed between the blade tip 11 of described blade 5 and blade root 12, and a=5-15 degree, by the setting of angle of attack a, the blade tip 11 localized design angle of attack can be reduced, realize tip and subtract merit.Although tip local acting ability can be sacrificed, also can reduce the pressure reduction of suction, pressure side, effectively reduce the leakage flow in blade tip 11 gap, and reduce aerodynamic loss.Result of calculation shows, the tip adopted in the design subtract merit design can under the prerequisite ensureing voltage rise demand raising efficiency.The selection of angle of attack a size according to the actual motion environment of blower fan, should be designed by computer simulation.
As shown in Figure 4, the innovative point of efficient sweepforward type subway tunnel axial-flow blower of the present utility model is also that trailing edge 13 thickness of described blade 5 is the 1/5-1/2 of leading edge 14 thickness, and research shows, blade trailing edge 13 key groove has tremendous influence to Blade Properties.Be optimized for blade trailing edge 13 especially in the utility model, by conscious reduction key groove to reduce trailing edge 13, reduce profile loss, through actual measurement, trailing edge 13 subtract thick after fan efficiency can improve more than 3%.
As shown in Figure 2, another innovative point of efficient sweepforward type subway tunnel axial-flow blower of the present utility model is that blade root 12 bottom of described blade 5 has an end curved 8, and the radian of described end curved 8 and the circumferential surface of wheel hub 4 match; By holding the setting of curved 8, the import angle of attack of blade root 12 can be reduced, the flox condition that better under the effect of adaptation proximal end wall regional edge interlayer, speed of incoming flow reduces.Although hold curved 8 can sacrifice blade root 12 local acting ability, also can reduce the pressure reduction of suction, pressure side, and this region can be weakened from pressure towards the migration of suction surface, suppress secondary flow, weaken three-dimensional separation.Result of calculation shows, curved 8 designs of the blade root adopted in the utility model 12 end can under the prerequisite ensureing voltage rise demand raising efficiency about 3%.
As shown in Figure 1, another innovative point of efficient sweepforward type subway tunnel axial-flow blower of the present utility model is that the windward side of described wheel hub 4 has one in hemispheric cap cone 9.9 shapes bored by the cap that has that it's too late of air inlet cap cone 9 all can to inlet flow field, and particularly root flow field produces significant impact.Original semielliptical (minor axis overlaps with running shaft) cap cone 9 is changed to hemisphere cap cone 9 by this time design.If it is too fast that 9 place's Curvature varying bored by cap, likely cause neighbouring fluid excessively to accelerate, when entering flat segments, Mach number is apparently higher than design load, and causing root section relative Mach number thus increases, and angle of attack off-design value, causes decrease in efficiency.
Claims (1)
1. an efficient sweepforward type subway tunnel axial-flow blower, comprise an air duct (1) and the motor (2) be placed in air duct (1) and impeller (3), described impeller (3) comprises a wheel hub (4) and along equally distributed several blades (5) of wheel hub (4) circumferential surface, leading edge (14) tail end that it is characterized in that described blade (5) has a sweepforward point (6), there is between the blade tip (11) of described blade (5) and blade root (12) angle of attack a reversed, a=5-15 degree, trailing edge (13) thickness of described blade (5) is the 1/5-1/2 of leading edge (14) thickness, blade root (12) bottom of described blade (5) has an end curved (8), the radian of described end curved (8) and the circumferential surface of wheel hub (4) match, the windward side of described wheel hub (4) has one in hemispheric cap cone (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520587489.7U CN204921414U (en) | 2015-08-06 | 2015-08-06 | High -efficient sweepforward type subway tunnel axial fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520587489.7U CN204921414U (en) | 2015-08-06 | 2015-08-06 | High -efficient sweepforward type subway tunnel axial fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204921414U true CN204921414U (en) | 2015-12-30 |
Family
ID=54970548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520587489.7U Withdrawn - After Issue CN204921414U (en) | 2015-08-06 | 2015-08-06 | High -efficient sweepforward type subway tunnel axial fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204921414U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065302A (en) * | 2015-08-06 | 2015-11-18 | 浙江上风高科专风实业有限公司 | Efficient sweepforward-type subway tunnel axial flow fan |
| CN110030203A (en) * | 2019-04-29 | 2019-07-19 | 莱克电气绿能科技(苏州)有限公司 | A kind of both cooling and heating blower |
-
2015
- 2015-08-06 CN CN201520587489.7U patent/CN204921414U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105065302A (en) * | 2015-08-06 | 2015-11-18 | 浙江上风高科专风实业有限公司 | Efficient sweepforward-type subway tunnel axial flow fan |
| CN105065302B (en) * | 2015-08-06 | 2018-01-16 | 浙江上风高科专风实业有限公司 | A kind of efficiently sweepforward type subway tunnel axial flow blower |
| CN110030203A (en) * | 2019-04-29 | 2019-07-19 | 莱克电气绿能科技(苏州)有限公司 | A kind of both cooling and heating blower |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151230 Effective date of abandoning: 20180116 |