CN114962325A - High-efficiency fan blade and centrifugal fan - Google Patents
High-efficiency fan blade and centrifugal fan Download PDFInfo
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- CN114962325A CN114962325A CN202210697180.8A CN202210697180A CN114962325A CN 114962325 A CN114962325 A CN 114962325A CN 202210697180 A CN202210697180 A CN 202210697180A CN 114962325 A CN114962325 A CN 114962325A
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 3
- 229920000106 Liquid crystal polymer Polymers 0.000 claims description 7
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000001746 injection moulding Methods 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 4
- 230000030279 gene silencing Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 abstract description 5
- 239000004033 plastic Substances 0.000 description 4
- 238000005498 polishing Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002861 polymer material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000003913 materials processing Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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- 239000004416 thermosoftening plastic Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention relates to a high-efficiency fan blade, which comprises a hub and a plurality of blades, wherein the blades are formed by extending outwards along the peripheral side of the outer edge of the hub along the radial direction; the blade is formed with stiff end and free end, the straight plate section is located the free end. When the first arc-shaped section and the second arc-shaped section are connected with each other to form the high-efficiency blade through the straight plate section and the circle center of the hub on the same straight line, the rotating speed, the output air volume and the static pressure of the fan blade can be further improved when the fan blade operates.
Description
Technical Field
The invention relates to a high-efficiency fan blade.
Background
With the development of science and technology, computers are updated more and more quickly, and heat generated by computer heat sources is more and more, so that the requirements on cooling fans inside the computers are higher and higher.
The conventional heat dissipation device usually uses a centrifugal fan, the conventional centrifugal fan blade usually uses metal or plastic to manufacture the fan blade, however, the metal fan blade has heavy weight, the plastic fan blade has light weight, and the fan blade is conventionally formed by using straight blades or arc-shaped blades, so that it is difficult to further reduce the noise of the centrifugal fan, further increase the output air volume, and the like, and thus it is difficult to improve the wind driving efficiency of the fan.
Disclosure of Invention
The invention aims to provide a novel high-efficiency fan blade, and aims to solve the problem that the air volume and the static pressure of the conventional centrifugal fan are insufficient.
The technical scheme provided by the invention for solving the technical problems is as follows:
a high-efficiency fan blade comprises a hub and a plurality of blades, wherein the blades are formed by extending outwards along the radial direction from the peripheral side of the outer edge of the hub, each blade comprises a straight plate section, a first arc-shaped section and a second arc-shaped section, the second arc-shaped section is connected to the hub, and the first arc-shaped section is positioned between the second arc-shaped section and the straight plate section and is connected with the second arc-shaped section and the straight plate section; the blade is formed with stiff end and free end, straight plate section is located the free end.
Further, the straight plate section is in the same straight line with the center of a circle of the hub.
Further, a is formed at the fixed end of the second arc-shaped segment, a straight line passing through the fixed end of the second arc-shaped segment and the center of the hub is defined as B, an included angle a is formed between a and B, and the included angle a is not less than 40 degrees and not more than 60 degrees.
Furthermore, the bending directions of the first arc-shaped section and the second arc-shaped section are opposite, and the first arc-shaped section and the second arc-shaped section are directly connected and are in smooth transition at the connection part.
Further, the bending directions of the first arc-shaped section and the second arc-shaped section are opposite, and the first arc-shaped section and the second arc-shaped section are smoothly transited through a transition section.
Further, the linear distance from the center of the hub to the free end of the blade is a radius r, and the length of the straight plate section along the radial direction of the hub is l 1 And satisfies 0.08 × r ≦ l1 ≦ 0.11 × r.
Further, the arc length of the second arc-shaped segment is l 3 The arc length of the first arc-shaped section is l 2 Satisfies 0.3 x l 3 ≦l 2 ≦0.6*l 3 。
Further, the thicknesses of the first arc-shaped section, the second arc-shaped section and the straight plate section are the same.
Furthermore, the noise-reduction device also comprises a noise-reduction ring which integrally connects a plurality of the straight plate sections.
Further, along the radial direction of the hub, two ends of the straight plate section protrude out of the silencing ring.
Further, the number of the blades is not less than 60 and not more than 100.
Further, the first arc-shaped section is an arc-shaped section, an end point is formed at one end of the first arc-shaped section connected with the straight plate section, and a tangent line of the first arc-shaped section at the end point is coincided with the straight plate section.
Furthermore, the second arc section is an arc section, a first tangent line is formed at the position of an end point where the first arc section is connected with the second arc section, a second tangent line is formed at the position of an end point where the second arc section is connected with the first arc section, and the first tangent line and the second tangent line are overlapped.
Further, the radius of the second arc-shaped section ranges from 15mm to 30mm, and the radius of the first arc-shaped section ranges from 5mm to 10 mm.
Further, the maximum thickness of each blade is not more than 0.5 mm.
Further, the curvature of the second arcuate segment is less than the curvature of the first arcuate segment.
Further, the blade is formed by injection molding of a liquid crystal polymer material.
The invention also provides a centrifugal fan, which comprises a base and a cover plate, wherein the high-efficiency fan blade is arranged on the base, and the cover plate is positioned above the high-efficiency fan blade.
The invention has the beneficial effects that: the reasonable design and layout of the multi-section arc-shaped section and the straight plate section blades are combined, so that the overall efficiency of the fan is improved.
Drawings
The invention will be further explained with reference to the figures and examples.
FIG. 1 is a perspective view of a fan blade of the present invention.
FIG. 2 is a top view of the fan blade of the present invention.
FIG. 3 is a schematic view of a blade of a fan blade of the present invention.
Fig. 4 is an enlarged schematic view of C in fig. 2.
FIG. 5 is a schematic view of another embodiment of a blade of the present invention.
FIG. 6 is a schematic view of a prior art cambered vane.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 4, a first embodiment of the high performance fan blade of the present invention is shown. The high-performance fan blade includes a hub 10 and a plurality of blades (not numbered in the drawings), the hub 10 may be a metal hub 10 or a plastic hub 10 or a combination of the two, and in the present application, the blades are plastic blades.
The hub 10 has an outer periphery side, and the plurality of blades are formed by extending outwards along the radial direction along the outer periphery side of the hub 10, and the blades include a straight plate section 21, a first arc-shaped section 22 and a second arc-shaped section 23. The blade defines a fixed end 11 and a free end 12. The fixed end 11 is connected and fixed on the periphery side of the outer edge of the hub 10, the straight plate section 21 forms the free end 12 of the blade, and the first arc-shaped section 22 is positioned between the second arc-shaped section 23 and the straight plate section 21 and is connected with the second arc-shaped section 23 and the straight plate section 21.
Specifically, the straight plate section 21 and the center of the hub 10 are on the same straight line, the straight line distance from the center of the hub 10 to the free end 12 of the blade is a radius r, and the length of the straight plate section 21 along the radial direction of the hub 10 is l 1 Satisfies 0.08 r ≦ l 1 ≦ 0.11 r for improving the efficiency of the fan blade, in this embodiment l 1 Preferably 1.15mm and the radius r is preferably 13 mm.
In the first embodiment, a tangent line at the fixed end 11 of the second arc-shaped segment 23 is defined as a, a straight line passing through the fixed end 11 of the second arc-shaped segment 23 and a center of the hub 10 is defined as B, an included angle α is formed between a and B, the included angle α is between 40 degrees and 60 degrees, and a curvature of the second arc-shaped segment 23 is smaller than a curvature of the first arc-shaped segment 22.
Specifically, the bending directions of the second arc-shaped segment 23 and the first arc-shaped segment 22 are opposite, and the first arc-shaped segment 22 is directly connected with the second arc-shaped segment 23 and smoothly transits at the connection position. The second arc segment 23 has an arc length of l 3 The first arc segment 22 has an arc length of l 2 Satisfies 0.3 x l 3 ≦l 2 ≦0.6*l 3 For improving the efficiency of the fan blade. In this application, the first arc-shaped segment 22 is an arc-shaped segment, the connection end of the first arc-shaped segment 22 and the straight-plate segment 21 forms an end point 221, and a tangent line of the first arc-shaped segment 22 at the end point 221 coincides with the straight-plate segment 21. The second arc-shaped segment 23 is also an arc-shaped segment, a first tangent is formed at the connection end point of the first arc-shaped segment 22 and the second arc-shaped segment 23, a second tangent is formed at the connection end point of the second arc-shaped segment 23 and the first arc-shaped segment 22, and the first tangent and the second tangent are overlapped with each other. Specifically, the radius of the second arc segment 23 ranges from 15mm to 30mm, and the radius of the first arc segment 22 ranges from 5mm to 10mm, and in the present embodiment, the radius of the second arc segment is preferably 18mm, and the radius of the first arc segment is preferably 7.5 mm.
Specifically, the maximum thickness of each blade is not more than 0.5 mm. The straight plate section 21 has a thickness t, the thickness t is preferably 0.15mm, and the thicknesses of the first arc-shaped section 22 and the second arc-shaped section 23 are the same as the thickness t of the straight plate section 21, so that the efficiency of the fan blade is improved, the whole structure of the fan blade is stable when the fan blade is subjected to demolding after injection molding, local fracture is not easy to occur, and the product yield is improved.
Specifically, in the present embodiment, the high-performance fan blade further includes a mute ring 30, the mute ring 30 integrally connects the plurality of straight plate sections 21, and two ends of the straight plate sections 21 protrude from the mute ring 30 along the radial direction of the hub 10, so as to achieve the noise reduction effect and improve the efficiency of the fan blade.
In the present application, it is preferable that the number of the blades of the high performance fan is not less than 60 and not more than 100. In the present embodiment, the number of the blades is 80.
As shown in fig. 5, another embodiment of the blade of the present application is different from the first embodiment in that: the first arc-shaped section 22 and the second arc-shaped section 23 are smoothly transited by the transition section 24, which can also achieve the similar effect as the first embodiment.
The following experimental data shows the comparison between the performance of the high performance fan blade designed by the present application and the performance of the old fan blade, which is composed of an arc-shaped blade in the present application (as shown in fig. 6).
Specifically, the performance of conventional curved blades of the prior art design was compared to the performance of the centrifugal fan blades of the present application, as shown in the following table,
| noise dB (A) | Rotational speed RPM | Air volume CFM | Static pressure mmH2O | |
| Old fan blade | 38 | 3200 | 7.18 | 10.49 |
| High-efficiency fan blade | 38 | 3300 | 7.92 | 11.77 |
As can be seen from the above table, compared with the old fan blade, the high-efficiency fan blade in the application has the advantages that the rotating speed is increased by 0.03%, the air quantity is increased by 10.3%, and the static pressure is increased by 12.2%. This demonstrates that, compared with the prior art, the high-efficiency fan blade in the present application can improve the air quantity of the arc-shaped blade and the defect of insufficient static pressure.
In this embodiment, the blades and the silencing ring are formed by injection molding of a liquid crystal polymer material, and a carbon fiber material may be mixed into the liquid crystal polymer material, so that the structural strength of the centrifugal fan blade is increased. The liquid crystalline polymer material is a generic name for thermoplastic aromatic polyesters which exhibit liquid crystallinity when in a molten state. The liquid crystal polymer has molecular structure not easy to bend, and is characterized in that the degree of molecules specific to general polymer materials wound on the liquid crystal polymer is very light, and different from general polymers, the entanglement among molecular chains is very little. The molecular orientation can be caused by small shearing force, the flow resistance is very small during injection molding, and the molding flowability is excellent. And because the molecules maintain the same molecular structure phase as that in the molten state during solidification, the volume change of the rearrangement of the molecules is small, and high dimensional accuracy can be obtained; according to the characteristics, the liquid crystal high polymer material is suitable for manufacturing the thinned centrifugal fan blade.
The fluid polishing technology can be used for fine grinding treatment according to various technical requirements, can also be used for achieving mirror polishing according to different materials and pre-processing treatment, or solves the problem of difficult adhesion of surface treatment. The principle is that soft resin is added with high-fluidity liquid glue, and then grinding particles are selectively added according to grinding or polishing requirements. The special soft flowing abrasive is prepared, has the characteristics of fluidity and high-content grinding powder coating, passes through the surface of a workpiece in an up-and-down movement mode, can polish the surface of a mold by using special diamond particles and special polishing powder and achieves the effect of a mirror surface.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (18)
1. A high-performance fan blade comprises a hub (10) and a plurality of blades, and is characterized in that,
the blades are formed by extending outwards along the radial direction on the peripheral side of the outer edge of the hub (10), each blade comprises a straight plate section (21), a first arc-shaped section (22) and a second arc-shaped section (23), the second arc-shaped section (23) is connected to the hub (10), the first arc-shaped section (22) is located between the second arc-shaped section (23) and the straight plate section (21), and the second arc-shaped section (23) is connected with the straight plate section (21);
the blade is formed with a fixed end (11) and a free end (12), the straight section (21) being located at the free end (12).
2. The high performance fan blade as claimed in claim 1, wherein the straight plate section (21) is aligned with the center of the hub (10).
3. The high-performance fan blade of claim 2, wherein a tangent line a is formed at the fixed end (11) of the second arc-shaped segment (23), a straight line passing through the fixed end (11) of the second arc-shaped segment (23) and a center of the hub (10) is defined as B, and a and B form an angle a, and the angle a is not less than 40 degrees and not more than 60 degrees.
4. The high performance fan blade of claim 3, wherein the first arc-shaped segment (22) and the second arc-shaped segment (23) are bent in opposite directions, and the first arc-shaped segment (22) and the second arc-shaped segment (23) are directly connected and smoothly transited at the connection.
5. The high performance fan blade of claim 3, wherein the first arc-shaped segment (22) and the second arc-shaped segment (23) are bent in opposite directions, and the first arc-shaped segment (22) and the second arc-shaped segment (23) are smoothly transited by a transition segment (24).
6. The high performance fan blade according to claim 4 or 5, wherein the straight distance from the center of the hub (10) to the free end (12) of the blade is a radius r, and the length of the straight plate section (21) along the radial direction of the hub (10) is l 1 Satisfies 0.08 r ≦ l 1 ≦0.11*r。
7. The high performance fan blade as claimed in claim 4 or 5, wherein the arc length of the second arc-shaped segment (23) is l 3 The arc length of the first arc-shaped section (22) is l 2 Satisfies 0.3 x l 3 ≦l 2 ≦0.6*l 3 。
8. The high performance fan blade of claim 7, wherein the first arc-shaped segment (22), the second arc-shaped segment (23) and the straight segment (21) have the same thickness.
9. The high performance fan blade according to any one of claims 1 to 5, further comprising a mute ring (30), wherein the mute ring (30) integrally connects a plurality of the straight segments (21).
10. The high performance fan blade of claim 9, wherein: in the radial direction of the hub (10), two ends of the straight plate section (21) protrude out of the silencing ring (30).
11. The high performance fan blade according to any one of claims 1 to 5, wherein: the number of the blades is not less than 60 and not more than 100.
12. The high-performance fan blade according to any one of claims 1 to 5, wherein the first curved segment (22) is a circular arc segment, and the end of the first curved segment (22) connected to the straight plate segment (21) forms an end point (221), and a tangent line of the first curved segment (22) at the end point (221) coincides with the straight plate segment (21).
13. The high-performance fan blade according to any one of claims 1 to 5, wherein: the second arc section (23) is an arc section, a first tangent line is formed at the position of an end point where the first arc section (22) is connected with the second arc section (23), a second tangent line is formed at the position of an end point where the second arc section (23) is connected with the first arc section (22), and the first tangent line is overlapped with the second tangent line.
14. The high performance fan blade of claim 13, wherein: the radius range of the second arc-shaped section (23) is 15mm to 30mm, and the radius range of the first arc-shaped section (22) is 5mm to 10 mm.
15. The high performance fan blade of claim 1, wherein: the maximum thickness of each blade is not more than 0.5 mm.
16. The high performance fan blade of claim 12, wherein: the curvature of the second arc-shaped section (23) is smaller than the curvature of the first arc-shaped section (22).
17. The high performance fan blade of claim 1, wherein: the vanes are formed by injection molding of a liquid crystal polymer material.
18. A centrifugal fan comprising the high efficiency fan blade of any one of claims 1-16, wherein: also comprises
The high-efficiency fan blade is arranged on the base;
and the cover plate is positioned above the high-efficiency fan blades.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210697180.8A CN114962325A (en) | 2022-06-20 | 2022-06-20 | High-efficiency fan blade and centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210697180.8A CN114962325A (en) | 2022-06-20 | 2022-06-20 | High-efficiency fan blade and centrifugal fan |
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| Publication Number | Publication Date |
|---|---|
| CN114962325A true CN114962325A (en) | 2022-08-30 |
Family
ID=82964406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210697180.8A Pending CN114962325A (en) | 2022-06-20 | 2022-06-20 | High-efficiency fan blade and centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114962325A (en) |
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| US3394876A (en) * | 1959-07-24 | 1968-07-30 | Bruno Eck | Drum motor blade construction |
| EP1669610A1 (en) * | 2004-12-13 | 2006-06-14 | Faz Elektrik Motor Makina Sanayi ve Ticaret A.S. | Axial fan |
| CN202165308U (en) * | 2011-07-08 | 2012-03-14 | 重庆神驰机电有限公司 | Fan of generator |
| CN103062112A (en) * | 2013-01-10 | 2013-04-24 | 中联重科股份有限公司 | Road cleaning unit and centrifugal fan impeller thereof |
| CN107882771A (en) * | 2017-10-18 | 2018-04-06 | 江苏大学 | A kind of Optimization Design of jet type self-suction centrifugal pump |
| US20190368504A1 (en) * | 2018-05-29 | 2019-12-05 | Asia Vital Components Co., Ltd. | Fan wheel structure |
| CN111946665A (en) * | 2020-08-20 | 2020-11-17 | 奇鋐科技股份有限公司 | Centrifugal fan blade structure |
| CN213176143U (en) * | 2020-08-05 | 2021-05-11 | 太仓欣华盈电子有限公司 | Fan blade balance debugging structure |
| CN213953989U (en) * | 2020-12-18 | 2021-08-13 | 泛仕达机电股份有限公司 | Axial flow wind wheel and fan applying same |
| CN214465094U (en) * | 2020-12-24 | 2021-10-22 | 无锡绿岛风环保工程有限公司 | High-pressure ventilator impeller that spinning machine used |
| CN214499477U (en) * | 2020-12-29 | 2021-10-26 | 太仓欣华盈电子有限公司 | Mute fan, heat dissipation device and electronic product |
| EP3922817A1 (en) * | 2019-02-07 | 2021-12-15 | Ihi Corporation | Method for designing blade for axial flow type fan, compressor and turbine, and blade obtained by means of said design |
-
2022
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Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3394876A (en) * | 1959-07-24 | 1968-07-30 | Bruno Eck | Drum motor blade construction |
| EP1669610A1 (en) * | 2004-12-13 | 2006-06-14 | Faz Elektrik Motor Makina Sanayi ve Ticaret A.S. | Axial fan |
| CN202165308U (en) * | 2011-07-08 | 2012-03-14 | 重庆神驰机电有限公司 | Fan of generator |
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| EP3922817A1 (en) * | 2019-02-07 | 2021-12-15 | Ihi Corporation | Method for designing blade for axial flow type fan, compressor and turbine, and blade obtained by means of said design |
| CN213176143U (en) * | 2020-08-05 | 2021-05-11 | 太仓欣华盈电子有限公司 | Fan blade balance debugging structure |
| CN111946665A (en) * | 2020-08-20 | 2020-11-17 | 奇鋐科技股份有限公司 | Centrifugal fan blade structure |
| CN213953989U (en) * | 2020-12-18 | 2021-08-13 | 泛仕达机电股份有限公司 | Axial flow wind wheel and fan applying same |
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