CN103291658B - A kind of axial flow type fan impeller with anti-surge function - Google Patents
A kind of axial flow type fan impeller with anti-surge function Download PDFInfo
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- CN103291658B CN103291658B CN201310248677.2A CN201310248677A CN103291658B CN 103291658 B CN103291658 B CN 103291658B CN 201310248677 A CN201310248677 A CN 201310248677A CN 103291658 B CN103291658 B CN 103291658B
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Abstract
The invention discloses a kind of axial flow type fan impeller with anti-surge function.The anti-surge measure of existing subway, tunnel blower, the inwall of the housing that general employing impeller tip is corresponding arranges anti-surge ring, the stall that it can effectively prevent blower fan from occurring when air quantity sharply declines, surging phenomenon, but when this kind of anti-surge complex structure, production blower fan, technique is loaded down with trivial details.The invention is characterized in that the both sides of described blade are all inwardly shunk, the established angle of blade is 40-50 °, and the radius of curvature ρ of blade is 22-28; Take diameter as the axial flow type fan impeller of 100mm be benchmark, blade outermost end chord length is 0.15-0.20:1 with the ratio of blade height, and blade inner terminal chord length is 0.45-0.60:1 with the ratio of blade height.Reasonable in design of the present invention, without the need to arranging anti-surge ring, makes blower fan avoid surge departing under nominal situation condition or under the state of emergency.
Description
Technical field
The present invention relates to ventilator field, specifically a kind of axial flow type fan impeller with anti-surge function.
Background technique
Along with the fast development of domestic communication and the tunnel of various subway, railway and highway more and more longer, the application of axial fan in the ventilation system of subway, railway, highway is widely.Because the ventilation duct in tunnel is intricate, when ventilation pipe network and silencing apparatus blocking, or because of vehicle travel the Piston Action Wind effect caused and the moment resistance caused is excessive time, the air quantity of blower fan sharply declines, when the air quantity of blower fan drops to a certain degree, to be there is stall, surge in blower fan, cause the high vibration of whole ventilation system, even damage blower fan.
The anti-surge measure of existing subway, tunnel blower, general employing on the inwall of housing corresponding to impeller tip arranges anti-surge ring, the stall that it can effectively prevent blower fan from occurring when air quantity sharply declines, surging phenomenon.But technique is loaded down with trivial details when this kind of anti-surge complex structure, production blower fan.
Summary of the invention
Technical problem to be solved by this invention is the defect overcoming the existence of above-mentioned prior art, there is provided a kind of and the axial flow type fan impeller improved has been done to blade structure, can effectively prevent blower fan departing from stall generation surging phenomenon under nominal situation or the state of emergency, to ensure ventilation system safe operation.
For this reason, the technical solution used in the present invention is: a kind of axial flow type fan impeller with anti-surge function, comprises wheel hub and is arranged on the blade on wheel hub, it is characterized in that, the both sides of described blade are all inwardly shunk, and the established angle of blade is 40-50 °, and the radius of curvature ρ of blade is 22-28; Take diameter as the axial flow type fan impeller of 100mm be benchmark, blade outermost end chord length is 0.15-0.20:1 with the ratio of blade height, and blade inner terminal chord length is 0.45-0.60:1 with the ratio of blade height.
The present invention, by the adjustment to the shape of blade, established angle, radius of curvature and blade chord length and blade height ratio, stops the backflow of root of blade air-flow, avoids the generation of impeller surging phenomenon.
Further, described blade is tile, up-narrow and down-wide, with the center line of blade for axle is symmetrical, improves impeller anti-surge effect further.
Further, the radius of curvature from the outermost end (i.e. outer rim) of blade to inner terminal (i.e. root) becomes large gradually, makes the surface of blade form smooth transition curved surface, improves impeller anti-surge effect further.
Further, the established angle of described blade is preferably 44-48 °, improves impeller anti-surge effect further.
Further, the radius of curvature ρ of described blade is preferably 24-26, improves impeller anti-surge effect further.
Reasonable in design of the present invention, without the need to arranging anti-surge ring, blower fan is made to depart under nominal situation condition or under the state of emergency, as blocked because of ventilation pipe network and silencing apparatus, or subway train reverse driving windward, or there is not surge in the situation such as the blower fan separate unit operation be installed in parallel, avoid the damage causing the miscellaneous equipments such as blower fan because surge causes strong mechanical vibration, ensure that the safe operation of ventilation system.
Accompanying drawing explanation
Fig. 1 is the structural representation of blade stereoscopic-state of the present invention.
Fig. 2 is the plan view of blade of the present invention.
Fig. 3 is the plan view of blade of the present invention.
Fig. 4 is the worm's eye view of blade of the present invention.
Fig. 5 is the right elevation of blade of the present invention.
Fig. 6 is the left view of blade of the present invention.
Fig. 7 is the structural representation of impeller stereoscopic-state of the present invention.
Fig. 8 is the plan view of impeller of the present invention.
Fig. 9 is the plan view of impeller of the present invention.
Figure 10 is the worm's eye view of impeller of the present invention.
Figure 11 is the right elevation of impeller of the present invention.
Figure 12 is the left view of impeller of the present invention.
Figure 13 is 1-1 sectional drawing in Figure 11.
Figure 14 is 2-2 sectional drawing in Figure 11.
Figure 15 is 3-3 sectional drawing in Figure 11.
Figure 16 is 4-4 sectional drawing in Figure 11.
Figure 17 is 5-5 sectional drawing in Figure 11.
Figure 18 is 6-6 sectional drawing in Figure 11.
Figure 19 is the performance chart of existing axial fan.
Figure 20 is the performance chart utilizing the present invention to make axial fan.
Embodiment
Below in conjunction with specification drawings and specific embodiments, the invention will be further described.
Axial flow type fan impeller as shown in Fig. 1-18, it is made up of wheel hub and the multiple blades 2 be arranged on wheel hub, the both sides of described blade are all inwardly shunk, in tile, up-narrow and down-wide, with the center line of blade for axle is symmetrical, the established angle θ r of blade is 40-50 °, as shown in Figure 1, A in Fig. 1 represents airflow direction, the radius of curvature ρ of blade is 22-28, radius of curvature from the outer end of blade to the inner becomes large gradually, see Figure 13-18, radius of curvature ρ in Figure 13 is 28, radius of curvature ρ in Figure 14 is 27, radius of curvature ρ in Figure 15 is 26, radius of curvature ρ in Figure 16 is 25, radius of curvature ρ in Figure 17 is 24, radius of curvature ρ in Figure 18 is 23, the surface of blade is made to form smooth transition curved surface.Take diameter as the axial flow type fan impeller of 100mm be benchmark, blade outermost end chord length is 0.15-0.20:1 with the ratio of blade height, and blade inner terminal chord length is 0.45-0.60:1 with the ratio of blade height.
Utilize the present invention to make axial fan anti-surge performance and see Figure 20.
Claims (3)
1. have an axial flow type fan impeller for anti-surge function, comprise wheel hub and be arranged on the blade on wheel hub, it is characterized in that, the both sides of described blade are all inwardly shunk, and the established angle of blade is 40-50 °, and the radius of curvature ρ of blade is 22-28; Take diameter as the axial flow type fan impeller of 100mm be benchmark, blade outermost end chord length is 0.15-0.20:1 with the ratio of blade height, and blade inner terminal chord length is 0.45-0.60:1 with the ratio of blade height;
Described blade is tile, up-narrow and down-wide, with the center line of blade for axle is symmetrical;
Radius of curvature from the outermost end of blade to inner terminal becomes large gradually, makes the surface of blade form smooth transition curved surface.
2. the axial flow type fan impeller with anti-surge function according to claim 1, is characterized in that, the established angle of described blade is 44-48 °.
3. the axial flow type fan impeller with anti-surge function according to claim 1, is characterized in that, the radius of curvature ρ of described blade is 24-26.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310248677.2A CN103291658B (en) | 2013-06-19 | 2013-06-19 | A kind of axial flow type fan impeller with anti-surge function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310248677.2A CN103291658B (en) | 2013-06-19 | 2013-06-19 | A kind of axial flow type fan impeller with anti-surge function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103291658A CN103291658A (en) | 2013-09-11 |
| CN103291658B true CN103291658B (en) | 2015-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201310248677.2A Active CN103291658B (en) | 2013-06-19 | 2013-06-19 | A kind of axial flow type fan impeller with anti-surge function |
Country Status (1)
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202149073U (en) * | 2010-04-27 | 2012-02-22 | 美蓓亚株式会社 | 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 |
| CN203297155U (en) * | 2013-06-19 | 2013-11-20 | 浙江上风实业股份有限公司 | Anti-surge impeller of axial-flow fan |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070160478A1 (en) * | 2005-12-29 | 2007-07-12 | Minebea Co., Ltd. | Fan blade with non-varying stagger and camber angels |
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2013
- 2013-06-19 CN CN201310248677.2A patent/CN103291658B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202149073U (en) * | 2010-04-27 | 2012-02-22 | 美蓓亚株式会社 | 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 |
| CN203297155U (en) * | 2013-06-19 | 2013-11-20 | 浙江上风实业股份有限公司 | Anti-surge impeller of axial-flow fan |
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| CN103291658A (en) | 2013-09-11 |
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Effective date of registration: 20160330 Address after: 312300 Shangyu City, Shaoxing province people's Road West, No. Patentee after: ZHEJIANG SHANGFENG GAOKE SPECIAL FAN INDUSTRY CO., LTD. Address before: 312375 Pu Economic Development Zone, Zhejiang, Shaoxing Patentee before: Shangfeng Industry Co., Ltd., Zhejiang Prov. |
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Address after: 312300 No. 1818, Renmin West Road, Dongguan Street, Shangyu District, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Shangfeng high tech special wind industry Co., Ltd Address before: 312300 No. 1818 Renmin West Road, Shangyu District, Zhejiang, Shaoxing Patentee before: ZHEJIANG SHANGFENG HI-TECH SPECIALIZED WIND INDUSTRIAL Co.,Ltd. |