CN103161758A - Bladed fan - Google Patents
Bladed fan Download PDFInfo
- Publication number
- CN103161758A CN103161758A CN2013100958285A CN201310095828A CN103161758A CN 103161758 A CN103161758 A CN 103161758A CN 2013100958285 A CN2013100958285 A CN 2013100958285A CN 201310095828 A CN201310095828 A CN 201310095828A CN 103161758 A CN103161758 A CN 103161758A
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- China
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- fan
- blade
- guide plate
- flow
- wheel hub
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Abstract
The invention relates to a bladed fan and aims at defects that an existing fan can cause separation of boundary layers and backflow of air flow so as to lead to lower static pressure and enlarge fan noise when attacking angles of the airflow are oversized. The bladed fan is provided. The bladed fan comprises a fan wheel hub and a plurality of blades, wherein the plurality of blades are uniformly arranged along the circumferential direction and are fixedly connected with the fan wheel hub. At least one flow deflector is arranged on a suction face of each fan blade. The front end of each flow deflector points to the front edge of the fan blade and the back end of the each flow deflector points to the back edge of the fan blade. The distance between the front end of the flow deflector and the center of fan wheel hub is shorter than the distance of the back end of the flow deflector and the center of the fan wheel hub. The flow deflectors which are located on the suction face of the fan blade can be used for rectifying the airflow so as to be effective to put off an airflow boundary layer on each flow blade to be formed. Boundary layers can be put off to be separated. Therefore, effects that wind quantity and wind voltage of the fan can be improved, radiating rates of a radiating fan can be improved, backflows and gap eddies of blades and blade tips of the fan can be reduced and noise can be reduced can be achieved.
Description
Technical field
The present invention relates to a kind of fan, relate in particular to a kind of blade fan that has.
Background technique
Fan is applied in family expenses and industry widely as air-supply or exhaust equipment, such as in the tunnel, hole, ore deposit, subway etc. and in machinery for the heat radiation of the machine radiator of engineering machinery for example.Fan is divided into without blade fan and blade fan is arranged, wherein have blade fan simple in structure, be easy to maintenance and low cost of manufacture and be employed widely.Existing have the blade fan structure to generally include fan hub and several fan blade, and fan blade circumferentially distributes equably and is fixed on fan hub.Fan hub drives blade rotary, and the pressure side of fan blade is sent wind.The suction surface smooth surface that the blade fan blade is arranged when fan blade High Rotation Speed and the air-flow angle of attack can cause boundary layer separation when excessive, causes airflow reflux at the blade tip place of fan blade, causes the shortcomings such as static pressure reduction, fan noise increase.
Summary of the invention
The object of the invention is to for there being blade fan can cause boundary layer separation when the air-flow angle of attack is excessive, cause airflow reflux, cause the shortcoming that static pressure reduces, fan noise increases and a kind of backflow and whirlpool, gap that reduces fan blade blade tip place is provided, reduces noise, increases the blade fan that has of air quantity and blast.
The present invention is for realizing that the technological scheme that its goal of the invention provides is such: construct a kind of blade fan that has, comprise that fan hub and a plurality of circumferentially evenly arranging are fixedly connected on blade on described fan hub, the suction surface of each fan blade is provided with at least one guide plate, the front end of guide plate points to the leading edge of fan blade, the trailing edge of fan blade is pointed in the rear end, and the distance at guide plate front end and fan hub center is less than the distance at guide plate rear end and wheel hub center.
In foregoing invention, guide plate is positioned at the medium line outside at fan blade blade tip and petiole two ends, namely is positioned at the outside half part of fan blade.
In foregoing invention, the front end of guide plate is positioned at the leading edge of blade, and the rear end is positioned at the trailing edge of blade.
In foregoing invention, guide plate comprises leading flow, and the rear end of leading flow is positioned at the trailing edge blade tip place of blade.
In foregoing invention, guide plate can also comprise secondary guide plate, and secondary guide plate is positioned on the suction surface of fan blade of inboard of leading flow, is also that secondary guide plate is positioned at the unilateral side to fan hub of major flow.Leading flow and secondary guide plate move towards identical, and also namely two guide plates are approximate is parallel to each other.If the length of fan blade is L, the distance h 1 between leading flow and secondary guide plate is 0.1L＜=h1＜=0.3L.
In foregoing invention, the line of the rear and front end of guide plate and horizontal angle a are 10 °～35 °.The line of the rear and front end of guide plate and horizontal angle a refer to when fan blade straight up or downwards the time, the line of the rear and front end of guide plate and horizontal angle.
In foregoing invention, guide plate is according to curvature contour setting on the suction surface of fan blade of fan blade, and also namely with respect to suction surface, guide plate height everywhere is identical.The thickness t of guide plate is 1mm～10mm.The scope of guide vane height h is t＜=h＜=4t, the rounded corner at guide plate top, and namely the chamfering radius R at guide plate top is t/2.
The present invention compared with prior art has following advantage:
1, the present invention has the fan blade suction surface of blade fan to add guide plate, and this guide plate has effect attractive in appearance concurrently when having the fan blade of reinforcement intensity.
2, the present invention has blade fan, because blade adds guide plate, makes fan possess the advantage of diagonal flow type radiation fan on performance, air quantity and the blast of fan are increased, boundary layer separation is postponed, and backflow and the whirlpool, gap at fan blade blade tip place reduce, reducing noise.
Description of drawings
Fig. 1 is the plan view that blade fan is arranged of the present invention.
Fig. 2 is the stereogram of fan blade of the present invention.
Fig. 3 is the plan view of fan blade of the present invention.
Fig. 4 is the sectional view of A-A in Fig. 3.
Component title and sequence number in figure:
Embodiment
Below in conjunction with the description of drawings specific embodiments.
In this application, the invention is not restricted to the structure of the parts shown in illustrated in following description or figure and details is set.The present invention can have other embodiments, can put into practice in every way or complete.And the present invention goes in all axial flow fans.
As shown in Figure 1, the blade fan that has in the present embodiment can be used in engineering machinery radiator, this fan comprises fan hub 11 and a plurality of fan blade 10, fan blade is circumferentially evenly arranged and is fixedly connected on fan hub, fan blade is connected with fan hub at its blade petiole place, the suction surface 17 of each fan blade 10 is provided with two guide plates, be respectively leading flow 12 and secondary guide plate 13, the inboard that secondary guide plate 13 is positioned at leading flow 12 namely is positioned at the unilateral side to fan hub of major flow.The front end of leading flow 12 and secondary guide plate 13 is positioned at the leading edge of fan blade, the rear end is positioned at the trailing edge of blade, and the rear end of leading flow is positioned at blade tip trailing edge place, and the distance at leading flow front end and fan hub center is less than the distance at leading flow rear end and wheel hub center, being parallel to each other of leading flow and secondary guide plate, leading flow and secondary guide plate all are positioned at the medium line outside of fan blade blade tip and petiole.
In the present embodiment, the length L of fan blade 10 is 260mm, and line and the horizontal angle a at leading flow 12 two ends are 18 °, and between secondary guide plate 13 and leading flow 12, distance h 1 is 50mm.Leading flow 12 is 3mm with the thickness t of secondary guide plate 13, height h is 10mm, and the chamfering radius R at top is 1.5mm.In the present embodiment, guide plate on fan blade suction surface 17 can carry out rectification to air-flow, and can effectively postpone the formation of fan blade overdraught boundary layer, postpone boundary layer separation, reach the air quantity and the blast that improve fan, improve the radiating efficiency of radiation fan, reduced backflow and the whirlpool, gap at fan blade blade tip place, fallen low noise effect.
In the present embodiment, guide plate on fan blade can be also other structural types, quantity as guide plate can be one or three, namely only have leading flow or increase again the 3rd guide plate in the inboard of leading flow, each guide plate height and width can be done corresponding adjustment, and the distance between each guide vane also can be done corresponding variation.
Claims (10)
1. one kind has blade fan, comprise that fan hub and a plurality of circumferentially evenly arranging are fixedly connected on blade on described fan hub, the suction surface that it is characterized in that each fan blade is provided with at least one guide plate, the front end of every guide plate points to the leading edge of fan blade, the trailing edge of fan blade is pointed in the rear end, and the distance at guide plate front end and fan hub center is less than the distance at guide plate rear end and wheel hub center.
2. according to claim 1 have a blade fan, it is characterized in that the front end of described guide plate is positioned at the leading edge of described blade, and the rear end is positioned at the trailing edge of described blade.
3. according to claim 1 and 2 have a blade fan, it is characterized in that described guide plate is made of leading flow and secondary guide plate, and described secondary guide plate is positioned on the suction surface of fan blade of inboard of described leading flow.
4. according to claim 3 have a blade fan, it is characterized in that the rear end of described leading flow is positioned at the trailing edge blade tip place of described blade.
5. according to claim 3 have a blade fan, it is characterized in that described leading flow and secondary guide plate move towards identical.
6. according to claim 1 have a blade fan, it is characterized in that line and the horizontal angle a of the rear and front end of described guide plate is 10 °～35 °.
7. according to claim 2 have a blade fan, and the length that it is characterized in that described fan blade is L, and the distance h 1 between described leading flow and secondary guide plate is 0.1L＜=h1＜=0.3L.
8. according to claim 1 have a blade fan, it is characterized in that described guide plate is according to curvature contour setting on the suction surface of fan blade of fan blade.
9. according to claim 1 have a blade fan, and the thickness t that it is characterized in that described guide plate is 1mm～10mm.
10. according to claim 9 have a blade fan, it is characterized in that described guide vane height h is t＜=h＜=4t, the rounded corner at described guide vane top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100958285A CN103161758A (en) | 2013-03-25 | 2013-03-25 | Bladed fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100958285A CN103161758A (en) | 2013-03-25 | 2013-03-25 | Bladed fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103161758A true CN103161758A (en) | 2013-06-19 |
Family
ID=48585173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100958285A Pending CN103161758A (en) | 2013-03-25 | 2013-03-25 | Bladed fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103161758A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402160A (en) * | 2015-12-18 | 2016-03-16 | 珠海格力电器股份有限公司 | Fan, axial flow fan blade and blade thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107477A (en) * | 1984-10-24 | 1986-07-02 | 克塞贝尔·奥托吉亚 | Axial flow fan |
| CN1865709A (en) * | 2005-05-17 | 2006-11-22 | 海尔集团公司 | Axial flow fan and application method thereof |
-
2013
- 2013-03-25 CN CN2013100958285A patent/CN103161758A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107477A (en) * | 1984-10-24 | 1986-07-02 | 克塞贝尔·奥托吉亚 | Axial flow fan |
| CN1865709A (en) * | 2005-05-17 | 2006-11-22 | 海尔集团公司 | Axial flow fan and application method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402160A (en) * | 2015-12-18 | 2016-03-16 | 珠海格力电器股份有限公司 | Fan, axial flow fan blade and blade thereof |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130619 |