CN202326414U - Axial-flow fan - Google Patents
Axial-flow fan Download PDFInfo
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- CN202326414U CN202326414U CN201120466239XU CN201120466239U CN202326414U CN 202326414 U CN202326414 U CN 202326414U CN 201120466239X U CN201120466239X U CN 201120466239XU CN 201120466239 U CN201120466239 U CN 201120466239U CN 202326414 U CN202326414 U CN 202326414U
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- fin
- axial fan
- fan according
- wall thickness
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Abstract
The utility model provides an axial-flow fan, comprising a wheel hub and a rib, wherein a pressure surface wall thickness reinforcing part is arranged at one side of the pressure surface of the front edge of the rib, the pressure surface wall thickness reinforcing part protrudes out of the pressure surface of the rib, and a corner is arranged at the front edge of the rib close to a rib tip. The axial-flow fan provided by the utility model has the following main advantages that the rib is provided with the wall thickness reinforcing part, so that interference and turbulence are reduced, thus reducing noise; the rib tip is designed to be inclined forwards, so that surge phenomenon is solved; and an expansion part is arranged at the rear edge of the rib, so that the pressure at the part is increased.
Description
Technical field
The utility model relates to air conditioner and field of fluid machinery, particularly a kind of axial fan that is applicable to air conditioner outdoor machine.
Background technique
Axial fan is used in air conditioner outdoor machine or other air regenerating devices at large, plays the effect that circulates of air.Existing air conditioner is by the circular hub portion with rotating center with the basic structure of axial fan and is several fins of radial arrangement at the wheel hub outer circumferential side and constitutes that fin is drawn by the three-dimension curved surface shape.Through motor driving rotation, air flows into from the front edge of fin, flows out through the aerofoil hinder marginal part of back by fin that boosted.
Fig. 9 shows a kind of axial fan that generally uses in the existing technology, is made up of wheel hub 110 and fin 120.Fin 120 has leading edge 121, and aerofoil 122 and wing trailing edge 123 show sense of rotation with arrow among the figure.Its wing trailing edge 123 is straight line basically.
There are some problems in the axial flow fan for air conditioner of existing technology, and at first, makeup of the imports angle incompatibility suction port air-flow field is easy to cause the incidence loss of air-flow to the fin inlet edge; Secondly, during the fan rotation, its fin is done cyclical movement, and air is applied bigger varying accelerated motion, causes air to produce bigger pressure pulsation, and air particle produces bigger impact noise under the effect of cyclic force.In rotation during operating mode, air-flow get into the fan runner centrifugal action with going into greatly that the caused gas boundary layer of gas angle of attack downstream impact fan leading edge separates the eddy current that produces and form eddy current crack.In addition, have bigger pressure difference between the pressure side of the fin of this type fan and the suction surface, this will cause occurring exit flow vortex and top stream vortex, thereby produce bigger noise.
In order to lower these noises, the fin of the wing blade that common technology is the design airfoil, the employing aerodynamic quality is good.But in these quietization methods, still there are many problems relatively outstanding and be difficult to solve.Such as; The distortion aerofoil profile that adopts inlet angle radially to reduce gradually in order to reduce the inlet air flow incidence loss; But its prerequisite of calculating inlet angle is that the supposition inlet air flow is for axially flowing to uniformly fin; In fact the charge air flow of fan is a kind of free flow field, and distribution form is the flow field of confluxing, so such design method still has bigger incidence loss concerning fan blade.And for example, 2002-257088 number disclosed following scheme of Japan Patent: the hinder marginal part at fin is designed with towards the bulge of fin sense of rotation rear side (air outflow side).Described bulge is to be recessed to form to the importing direction opposite with the air stream outgoing direction (the sense of rotation front side of fin) through the profile line that makes the fin hinder marginal part (connecting the inner circumference edge of wing hinder marginal part and the line of outer periphery).Because the fin bulge that hinder marginal part is formed with of this form, the air that flows out from this position can produce whirlpool at the bulge rear, thereby the air-supply noise will increase, thereby produces the ambient noise problem of use air conditioner or air interchanger.
The model utility content
The utility model provides a kind of simple in structure to the deficiency of above-mentioned existing technology, can avoid the fan blade flutter, reduces the novel axial fan tab construction of noise effectively.
The utility model is realized through following technological scheme: a kind of axial fan comprises: wheel hub and fin; Pressure side one side of the leading edge of fin has pressure side wall thickness reinforcing part, the pressure side of pressure side wall thickness reinforcing part protrusion fin, and the leading edge of fin forms the turning near the wing tip place.
Further, pressure side wall thickness reinforcing part extends to the wing tip portion of fin along the leading edge bearing of trend of fin from the joining portion of the leading edge of fin and wheel hub.
Further, the width of pressure side wall thickness reinforcing part is reduced by joining portion to wing tip portion gradually.
Further, pressure side wall thickness reinforcing part is streamlined, and seamlessly transits with the surface flow line style of fin.
Further, suction surface one side at the fin root is provided with suction surface wall thickness reinforcing part.
Further, fin also has curved part, is formed to the suction surface bending by the pressure side peripheral edge of fin.
Further, the width of curved part is 5.5% of an axial fan outer circumference diameter.
Further, the fin trailing edge is a waveform, has bulge.
Further, bulge is outstanding to the direction opposite with the sense of rotation of fin with respect to the straight line that the cardinal extremity of fin trailing edge is connected with outer circumference end.
Further, the turning is 120 ° to 165 °.
Further, the leading edge of the tip station of fin is to the sense of rotation sweepforward of axial fan, and the surface of fin always flow path direction tilts, and the surface of fin tilts to the sense of rotation of axial fan.
Further, the leading edge of fin tip station has first portion and second portion, and first portion's sweepforward angle is 12 ° to 18 °, and the second portion sweepforward angle is 13 ° to 17 °.
Further, the surface of the fin always angle that leans forward of flow path direction is 15 ° to 18 °, and the surface of fin is 15 ° to 18 ° to the angle that the sense of rotation of axial fan leans forward.
Further, the aerofoil air inlet angle of attack is 0 ° to 15 °.
Through technique scheme, the major advantage of the utility model is that fin is provided with the wall thickness reinforcing part, has reduced and has interfered and turbulent flow; The leading edge of fin is provided with the turning, makes airflow field more smooth and easy, and then has reduced noise, and wing tip adopts the FC design, has solved surging phenomenon, and the fin trailing edge is provided with bulge, increases the pressure here.
Description of drawings
The accompanying drawing that constitutes the part of the utility model is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 shows an embodiment's of the utility model the front view of axial fan;
Fig. 2 shows an embodiment's of the utility model the rear view of axial fan;
Fig. 3 shows an embodiment's of the utility model the sectional view of pressure side wall thickness reinforcing part on width direction of axial fan;
Fig. 4 shows an embodiment's of the utility model the comparison diagram of the gas angle of attack of the gas angle of attack and existing technology of axial fan;
Fig. 5 shows an embodiment's of the utility model the three-dimensional structure diagram of axial fan;
Fig. 6 shows an embodiment's the radial line of fan blade of axial fan of the utility model to the angle of inclination of fan sense of rotation;
Fig. 7 shows an embodiment's of the utility model the oblique three-dimensional view of axial fan;
Fig. 8 shows an embodiment's of the utility model the schematic representation of fin of axial fan;
Fig. 9 shows the front view of a kind of axial fan of the prior art;
The axial fan of the utility model and the noise comparison diagram of axial fan of the prior art have been shown among Figure 10; And
The axial fan of the utility model and the air quantity comparison diagram of axial fan of the prior art have been shown among Figure 11.
Embodiment
Embodiment to the utility model is elaborated below in conjunction with accompanying drawing, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
Fig. 1 shows an embodiment's of the utility model the front view of axial fan.In this embodiment; Like Fig. 1, shown in Figure 7; The axial fan of the utility model is a three wings formula axial fan; Comprise wheel hub 10, reach the fin with same shape 20 that radially distributes at its outer circumferential side, and three fins are in 120 ° ± 5 ° scope equidistantly or the unequal-interval distribution as running shaft.The leading edge of fin 20 is provided with pressure side wall thickness reinforcing part 211 simultaneously in pressure side one side; The thickness of pressure side wall thickness reinforcing part 211 is thicker than other parts of fin 20; Pressure side wall thickness reinforcing part 211 begins from leading edge and wheel hub joining portion 214 to extend to lean forward root 213 places of part of fin and its wing tip sweepforward along the leading edge contour; It is streamlined structure, and width is diminished by leading edge wing root portion 214 to the sweepforward part root 213 that leans forward gradually, and seamlessly transits with the aerofoil profile streamline of fin; Wall thickness is 1mm to 4mm, and width is 30mm to 0.
As shown in Figure 2, in the whole wing root portion of suction surface one side of fin 20 suction surface wall thickness reinforcing part 30 is set, the width of suction surface wall thickness reinforcing part 30 is 5mm to 20mm, is effective value when thickness is 2mm to 6mm.
Fig. 3 is the sectional view of the pressure side wall thickness reinforcing part width direction of the utility model, as can be seen from Figure 3 with the rotating center with hub portion be benchmark distance increasing, its width reduces more.Preferably, the pressure side wall thickness reinforcing part in the present embodiment, with the rotating center with hub portion be benchmark distance increasing, its thickness also can be constant.
As shown in Figure 4, the air inlet angle of attack is the angle that trailing edge end point straight line is put at the leading edge end of airflow direction and blade, and δ is the air inlet angle of attack of the prior art; γ is the air inlet angle of attack of present embodiment; γ＜δ, the γ of present embodiment are 0 ° to 15 °, and the arrow among the figure is represented the flow direction of air-flow.The turning ξ at wing tip leading edge as shown in Figure 7 place is 120 ° to 165 °, and the leading edge of fin is provided with the turning, makes airflow field more smooth and easy, thereby reduces the air flow noise.
For the intensity that improves fin 20 and fin 20 join strength with hub portion 10, improve the intensity of the relative centrifugal force of fin 20, reduce or eliminate the fan blade flutter that the fin leading edge causes; And improve the air inlet angle of attack; Optimize the flow field, blade face, be provided with from the joining portion of fin front edge and profile portion at pressure side and begin, postpone fan blade blade profile curve and seamlessly transit of its streamline with it along the pressure side wall thickness reinforcing part 211 (being flange) of fin leading edge airfoil periphery extension; Pressure side wall thickness reinforcing part 211 ends in the ξ place, turning of leading edge; And with the rotating center with hub portion be benchmark distance increasing, its width reduces more, thickness is constant.Simultaneously, in a side of suction surface, fin and hub portion joining portion also are provided with the suction surface wall thickness reinforcing part 30 of one section wide uniform thickness, and thickening thickness is to strengthen the intensity of wing root.
As shown in Figure 7, be arranged on 3 fins 20 on the wheel hub and the crooked position that is arranged on the fin top flange, to suction surface one lateral bending Qu Ercheng, crooked position and fin 20 adopt the circular arc smooth transition to this crooked position by the pressure side peripheral edge of fin.Under the situation that does not reduce each blade wind pushing performance, effectively suppress the generation of eddy current, the width of preferred curved part is about 5.5% of an axial fan outer circumference diameter.
Like Fig. 1, shown in Figure 8, these axial fan fin 20 trailing edges are wave-like type, from interior Zhou Jiduan 231 beginnings of wing hinder marginal part 23; Until outer circumference end 234, bulge 232 is to expand gradually toward the sense of rotation opposite direction of fin 20 with reference to straight line L, is not recessed forming before the sense of rotation of airfoil 20; The curvilinear equation of wherein controlling wing trailing edge is a quintic equation; As shown in Figure 4, be divided into 2 parts to this curve, i.e. bulge 232 and outer periphery portion 233; Wherein, the minimum point of outer periphery portion 233 and straight line are to tangent, and the chord length of setting bulge 232 is L2; The chord length of outer periphery portion 233 is L1, and L1≤L2 works as L1/L2 so and gets 0.1 to 1; Outstanding height/straight line to=H/L gets 0.1, is the effective value in the protection domain to 0.5 o'clock, plays pressurization; And the air-flow of each position of can staggering is left out the cycle, reduces the remarkable result of noise.
The utility model is provided with bulge on the hinder marginal part of each fin; The bulge of each fin is outstanding to the direction opposite with the sense of rotation of each fin with respect to the straight line L of antemarginal cardinal extremity that connects each fin and outer circumference end; And the curve of bulge is the wave line style; Described bulge is that inner circumference edge to the outer periphery from wheel hub one side of wing hinder marginal part expand successively and form, and is not the front side depression of airfoil sense of rotation.The sail area that this bulge can increase each blade is set, effectively replenishes the insufficient section of the static pressure ascending amount that peripheral edge owing to each fin of bending reduced, can realize the blow reduction of sound and the high efficiency of wind pushing performance like this.
To shown in Figure 6, in wing tip portion (212), the radial line on fan blade surface always flow path direction leans forward like Fig. 1, just near tip station than near the wing root part more near incoming flow, its tilt angle alpha is 15 ° to 18 °; And the radial line of flap surface also tilts to fan wing wheel sense of rotation; Being the radial surface line tilts at an angle to sense of rotation with respect to the horizontal plane of sense of rotation; This angle beta is 15 ° to 18 °, and the wing tip leading edge portion sweepforward of fin is promptly compared near the wing root part with respect to sense of rotation more forward near tip station; This wing tip leading edge portion is divided into two-part; Part sweepforward angle θ 1 is 12 ° to 18 °, and another part θ 2 is 13 ° to 17 °, forms the sweepforward fin that leans forward as among Fig. 7 by above-mentioned aerofoil profile.The wing tip portion (212) of fin adopts the FC design, during owing to the fin rotation bigger pressure difference is arranged between fin pressure side and suction surface, therefore will be from the anti-suction surface that flow to of pressure side at the air-flow at fin top.After leaning forward in the fin top, when impeller rotates, the air of fin tip portion will have the kinetic pressure that flows relatively in airfoil inside, stop this reverse eddy flow, play the effect that reduces the air swirl loss of fin top.
The three fin fans of the utility model; Because the fin costal field is provided with pressure side wall thickness reinforcing part 211; When air-flow gets into fan wing road from the fan blade leading edge; It at first passes through flange 211, and the angle of attack that its charge air flow angle of attack does not have under flange (wall thickness reinforcing part) state relatively is able to corresponding reducing, and the vortex diameters that makes fan blade leading edge place form thus reduces.And eddy current through flange (wall thickness reinforcing part) after, its travel path is elongated, and postpones thus and the separating of place suction surface, and then reduces in abutting connection with the interference of blade with reduce consequent turbulent flow.Wing tip portion adopts the FC design, can solve the flutter phenomenon that blade occurs under some operating frequency well; Wing trailing edge is provided with bulge, can increase the pressure here, replenishes simultaneously effectively because the insufficient section of the static pressure ascending amount that the peripheral edge of each fin of bending has reduced is avoided wing tail coming off the cycle of air-flow everywhere, the reduction noise that fan produced.Like Figure 10, shown in Figure 11, the axial fan of the utility model is compared under identical operating mode with existing axial fan, can draw the utility model fan and can increase the air quantity of the outer unit of air conditioner effectively and reduce its noise.
According to the axial-flow leaf of the utility model, have following beneficial effect:
Under the prerequisite that guarantees air quantity, effectively lower fan noise, have good application prospects; Can avoid the fan blade flutter, reduce the novel axial fan tab construction of noise effectively,, improve the rate of heat exchange of fan system simultaneously with the requirement of quietization that satisfy air conditioner or other heat-exchange systems and environmental protectionization.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (14)
1. axial fan; Comprise: wheel hub (10) and fin (20); It is characterized in that; Pressure side one side of the leading edge of said fin (20) has pressure side wall thickness reinforcing part (211), and said pressure side wall thickness reinforcing part (211) protrudes from the pressure side of said fin (20), and the leading edge of said fin (20) forms the turning near the wing tip place.
2. axial fan according to claim 1; It is characterized in that said pressure side wall thickness reinforcing part (211) extends to the wing tip portion (212) of said fin (20) along the leading edge bearing of trend of said fin (20) from the joining portion (214) of the leading edge of said fin (20) and said wheel hub (10).
3. axial fan according to claim 2 is characterized in that, the width of said pressure side wall thickness reinforcing part (211) is reduced by said joining portion (214) to said wing tip portion (212) gradually.
4. axial fan according to claim 1 is characterized in that, said pressure side wall thickness reinforcing part (211) is streamlined, and seamlessly transits with the surface flow line style of said fin (20).
5. axial fan according to claim 1 is characterized in that, is provided with suction surface wall thickness reinforcing part (30) in suction surface one side of said fin (20) root.
6. axial fan according to claim 1 is characterized in that, said fin (20) also has curved part, is formed to the suction surface bending by the pressure side peripheral edge of said fin (20).
7. axial fan according to claim 6 is characterized in that, the width of said curved part is 5.5% of a said axial fan outer circumference diameter.
8. axial fan according to claim 1 is characterized in that, said fin (20) trailing edge is a waveform, has bulge (232).
9. axial fan according to claim 8 is characterized in that, said bulge (232) is outstanding to the direction opposite with the sense of rotation of said fin (20) with respect to the straight line that the cardinal extremity (231) of said fin (20) trailing edge is connected with outer circumference end (234).
10. axial fan according to claim 1 is characterized in that, said turning is 120 °～165 °.
11. axial fan according to claim 1; It is characterized in that; The leading edge of the tip station of said fin (20) is to the sense of rotation sweepforward of said axial fan; Leaning forward in the surface of said fin (20) always flow path direction, leans forward to the sense of rotation of said axial fan in the surface of said fin (20).
12. axial fan according to claim 11 is characterized in that, the leading edge of the tip station of said fin (20) has first portion and second portion, and said first portion sweepforward angle is 12 ° to 18 °, and said second portion sweepforward angle is 13 ° to 17 °.
13. axial fan according to claim 11 is characterized in that, the surface of said fin (20) the always angle that leans forward of flow path direction is 15 ° to 18 °, and the surface of said fin (20) is 15 ° to 18 ° to the angle that the sense of rotation of axial fan leans forward.
14. axial fan according to claim 1 is characterized in that, said aerofoil (20) the air inlet angle of attack is 0 ° to 15 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120466239XU CN202326414U (en) | 2011-11-21 | 2011-11-21 | Axial-flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120466239XU CN202326414U (en) | 2011-11-21 | 2011-11-21 | Axial-flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202326414U true CN202326414U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120466239XU Expired - Lifetime CN202326414U (en) | 2011-11-21 | 2011-11-21 | Axial-flow fan |
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| CN (1) | CN202326414U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103016401A (en) * | 2013-01-11 | 2013-04-03 | 广东顺威精密塑料股份有限公司 | Novel axial fan for air-conditioner outdoor unit |
| CN103122872A (en) * | 2011-11-21 | 2013-05-29 | 珠海格力电器股份有限公司 | Axial flow fan |
| CN106122091A (en) * | 2016-08-23 | 2016-11-16 | 佛山市南海九洲普惠风机有限公司 | There is antecurvature efficient quiet impeller |
| CN107664140A (en) * | 2016-07-27 | 2018-02-06 | 日本电产株式会社 | Impeller and motor |
| CN111577655A (en) * | 2020-04-14 | 2020-08-25 | 约克广州空调冷冻设备有限公司 | Blade and axial flow impeller using same |
| CN111577656A (en) * | 2020-04-14 | 2020-08-25 | 约克广州空调冷冻设备有限公司 | Blade and axial flow impeller using same |
-
2011
- 2011-11-21 CN CN201120466239XU patent/CN202326414U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103122872A (en) * | 2011-11-21 | 2013-05-29 | 珠海格力电器股份有限公司 | Axial flow fan |
| CN103122872B (en) * | 2011-11-21 | 2016-02-10 | 珠海格力电器股份有限公司 | Axial fan |
| CN103016401A (en) * | 2013-01-11 | 2013-04-03 | 广东顺威精密塑料股份有限公司 | Novel axial fan for air-conditioner outdoor unit |
| CN107664140A (en) * | 2016-07-27 | 2018-02-06 | 日本电产株式会社 | Impeller and motor |
| CN106122091A (en) * | 2016-08-23 | 2016-11-16 | 佛山市南海九洲普惠风机有限公司 | There is antecurvature efficient quiet impeller |
| CN106122091B (en) * | 2016-08-23 | 2017-11-24 | 佛山市南海九洲普惠风机有限公司 | With antecurvature efficient Jing Yin impeller |
| CN111577655A (en) * | 2020-04-14 | 2020-08-25 | 约克广州空调冷冻设备有限公司 | Blade and axial flow impeller using same |
| CN111577656A (en) * | 2020-04-14 | 2020-08-25 | 约克广州空调冷冻设备有限公司 | Blade and axial flow impeller using same |
| CN111577656B (en) * | 2020-04-14 | 2021-11-05 | 约克广州空调冷冻设备有限公司 | Blade and axial flow impeller using same |
| CN111577655B (en) * | 2020-04-14 | 2021-11-05 | 约克广州空调冷冻设备有限公司 | Blade and axial flow impeller using same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120711 |
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| CX01 | Expiry of patent term |