CN2625621Y - Axial ventilator impeller with antecurvature blade - Google Patents
Axial ventilator impeller with antecurvature blade Download PDFInfo
- Publication number
- CN2625621Y CN2625621Y CN 03242893 CN03242893U CN2625621Y CN 2625621 Y CN2625621 Y CN 2625621Y CN 03242893 CN03242893 CN 03242893 CN 03242893 U CN03242893 U CN 03242893U CN 2625621 Y CN2625621 Y CN 2625621Y
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- blade
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- angle
- fan impeller
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Abstract
The utility model discloses an axial flow fan impeller with a forward bent blade, comprising a hub and a plurality of blades with the wing blade type or the arc-profile blade type. The blades arranged by circling the hub bends forward along the rotating direction, the forward bent angle of each section of the blade from a blade root to a blade tip is increased continually. The forward bent angle of the blade root section is zero while the forward bent angle of the blade tip section is the largest. The blade sweeps forward to the inflation direction. The utility model has the advantages that the separation of the boundary layer of the blade surface is controlled and retrained by the bent angle of the blade; the damage of the blade is reduced, thus improving the efficiency of the blower and reducing the aerodynamic noise. The utility model can be widely applied to the air ventilation and change, and the technological process of the industry and the civil use with low noise of the fan, low flow loss and high efficiency by the model experiment.
Description
Technical field
The utility model relates to a kind of axial fan impeller, and more particularly, it relates to a kind of axial fan impeller with forward curved vane.
Background technique
Existing propeller fan generally adopts wing blade profile or circular arc plate blade.In the pneumatic design and geometric modeling of blade, adopt the design theory of general complete three-dimensional radial equilibrium.The bending of dynamic and static blade, the amount of plunderring be not as design parameter.When geometry vanes is shaped, radially be formed by stacking blade by primitive blade cascade blade profile center.This design method and blade mould-forming method, can't control velocity distribution in the blade path, the secondary flow relevant such as separation, strength of vortex and secondary flow intensity of air-flow in the also uncontrollable blade path by changing BLADE FORCE size and Orientation in the blade row with flow losses.Existing propeller fan exists shortcomings such as fan noise height, efficient be low.
Summary of the invention
The purpose of this utility model is to overcome deficiency of the prior art, by blade bend, multi parameters control such as the amount of plunderring, reducing flow losses and aerodynamic noise, thereby provide a kind of axial fan impeller with forward curved vane.
The technical solution of the utility model is:
A kind of axial fan impeller with forward curved vane, comprise wheel hub 7 and a plurality of wing blade profile or circular arc plate blade profile blade 8, blade 8 is provided with around wheel hub 7, described blade 8 is antecurvature along its sense of rotation, the kyphotic angle of blade 8 each cross section I～VI increases continuously from the blade root to the blade tip, the kyphotic angle of blade root cross section VI is zero, the kyphotic angle maximum of blade tip cross section I.
Kyphotic angle ε=7 of the blade tip cross section I of described blade 8 °～40 °.
Described blade 8 is to the airintake direction sweepforward, sweepforward angle α=20 °～30 °.
The established angle β of described blade 8 each cross section I～VI
AFrom the blade root to the blade tip, reduce established angle β continuously
ABetween 18 °～60 °.
Described blade 8 adopts the cast inblock structure with wheel hub 7, perhaps adopts welding or riveted joint mode to connect.Described impeller comprises 2～20 blades 8 that shape is identical.
Compared with prior art, advantage of the present utility model is the curved angle of plunderring by blade, control and restrained separating of blade surface boundary layer, thereby the loss that has reduced blade has improved the efficient of blower fan, thereby also reduced aerodynamic noise.By the experiment of model level, fan noise of the present utility model is low, and flow losses are little, the efficient height.The utility model can be widely used in industry and civilian ventilation and technological process.
Description of drawings
Fig. 1 is the structural representation that the utlity model has the axial fan impeller of forward curved vane;
Fig. 2 is the side view that the utlity model has the axial fan impeller of forward curved vane;
Fig. 3 is the schematic representation of blade in r-θ plane;
Fig. 4 is the schematic representation of blade in the r-z plane;
The drawing explanation
Blade profile I～VI wheel hub 7 blades 8 blade centrelines 9
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
For the convenience of narrating, adopt cylindrical coordinate (r, θ here, z), be the center with the center of circle O of wheel hub 7, r is the radial direction of wheel hub 7, just blade 8 is respectively installed the bearing of trend in cross section, θ be vector in the circumferential plane of wheel hub 7 and the angle between the r, z be wheel hub 7 axially.
The structural representation of axial fan impeller of the present utility model in r-θ plane adopts the cast inblock structure between wheel hub 7 blade 8 identical with 4 shapes as shown in Figure 1.According to concrete application, also can take welding or riveted joint mode to be connected between wheel hub 7 and the blade 8, blade 8 numbers can change between 2～20, and the basic blade profile of blade 8 can adopt wing blade profile or circular arc plate blade profile.As a feature of the present utility model, blade 8 is antecurvature along the blade sense of rotation shown in Fig. 1 in r-θ plane.As another feature of the present utility model, blade 8 is on the whole to the airintake direction sweepforward, and sweepforward angle is α, as shown in Figure 2
Being distributed in of blade 8 each cross section kyphotic angle seen the most clearly among Fig. 3, chosen 6 representative sections in Fig. 3, and I～VI represents with Roman number, uses label O simultaneously
1～O
6The central position of expression respective cross-section, its middle section I is the blade tip cross section, cross section VI is the blade root cross section.The center O of blade root cross section VI
6With the line of wheel hub center of circle O be OO
6, described kyphotic angle is meant the center in each cross section and line and the OO of wheel hub center of circle O
6Between angle, for example, the kyphotic angle of cross section V is OO
5With OO
6Between angle.Fig. 3 gives the concrete numerical value of the kyphotic angle of each representative section in the present embodiment, the kyphotic angle of blade root cross section VI is 0, the kyphotic angle of cross section V is 8 °, the kyphotic angle of cross section IV is 15 °, the kyphotic angle of cross section III is 21 °, the kyphotic angle of cross section II is 28 °, and the kyphotic angle of blade tip cross section I is 34 °.As can be seen, the kyphotic angle in each cross section begins to increase continuously from blade root cross section VI, reaches maximum at I place, blade tip cross section.
Similar to the design of existing blade, each cross section of the utility model blade 8 has established angle β
AWith certain chord length.In table 1, provide the main design parameters of blade 8 in the present embodiment, comprised the established angle β of each representative section I～VI
A, chord length, and kyphotic angle and sweepforward angle.The chord length of described cross section I～VI is meant the distance between the blade profile two ends, and in Fig. 3, with being with the target label list to show, for example, the two ends of cross section II are respectively 2 ' and 2 respectively at the two ends of cross section I～VI ", its chord length is an end points 2 ' and 2 " between distance.
Table 1
Claims (8)
1, a kind of axial fan impeller with forward curved vane, comprise wheel hub (7) and a plurality of wing blade profile or circular arc plate blade profile blade (8), blade (8) is provided with around wheel hub (7), it is characterized in that, described blade (8) is antecurvature along its sense of rotation, (kyphotic angle of I～VI) increases continuously from the blade root to the blade tip, and the kyphotic angle of blade root cross section (VI) is zero, the kyphotic angle maximum of blade tip cross section (I) in blade (8) each cross section.
2, the axial fan impeller with forward curved vane according to claim 1 is characterized in that, kyphotic angle ε=7 in the blade tip cross section (I) of described blade (8) °～40 °.
3, the axial fan impeller with forward curved vane according to claim 1 is characterized in that, described blade (8) is to the airintake direction sweepforward.
4, the axial fan impeller with forward curved vane according to claim 3 is characterized in that, described blade (8) sweepforward angle α=20 °～30 °.
5, the axial fan impeller with forward curved vane according to claim 1 is characterized in that, each cross section of described blade (8) (established angle β of I～VI)
AFrom the blade root to the blade tip, reduce continuously.
6, the axial fan impeller with forward curved vane according to claim 5 is characterized in that, each cross section of described blade (8) (established angle β of I～VI)
ABetween 18 °～60 °.
7, the axial fan impeller with forward curved vane according to claim 1 is characterized in that, described blade (8) adopts the cast inblock structure with wheel hub (7), perhaps adopts welding or riveted joint mode to connect.
8, the axial fan impeller with forward curved vane according to claim 1 is characterized in that, described impeller comprises 2～20 blades (8) that shape is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03242893 CN2625621Y (en) | 2003-04-01 | 2003-04-01 | Axial ventilator impeller with antecurvature blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03242893 CN2625621Y (en) | 2003-04-01 | 2003-04-01 | Axial ventilator impeller with antecurvature blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2625621Y true CN2625621Y (en) | 2004-07-14 |
Family
ID=34250724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03242893 Expired - Lifetime CN2625621Y (en) | 2003-04-01 | 2003-04-01 | Axial ventilator impeller with antecurvature blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2625621Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782084A (en) * | 2010-03-02 | 2010-07-21 | 上海理工大学 | Minitype axial flow fan with C spline bent blades |
| CN102748327A (en) * | 2012-07-31 | 2012-10-24 | 洛瓦空气工程(上海)有限公司 | Axial-flow blower impeller device with sickle-shaped forward-bending blade |
| CN103835993A (en) * | 2014-02-24 | 2014-06-04 | 广东美的厨房电器制造有限公司 | Fan blade capable of blowing air in diffused mode and fan blade support |
| CN103835992A (en) * | 2014-02-24 | 2014-06-04 | 广东美的厨房电器制造有限公司 | Fan blade capable of blowing air in diffused mode and fan blade support |
-
2003
- 2003-04-01 CN CN 03242893 patent/CN2625621Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782084A (en) * | 2010-03-02 | 2010-07-21 | 上海理工大学 | Minitype axial flow fan with C spline bent blades |
| CN102748327A (en) * | 2012-07-31 | 2012-10-24 | 洛瓦空气工程(上海)有限公司 | Axial-flow blower impeller device with sickle-shaped forward-bending blade |
| CN103835993A (en) * | 2014-02-24 | 2014-06-04 | 广东美的厨房电器制造有限公司 | Fan blade capable of blowing air in diffused mode and fan blade support |
| CN103835992A (en) * | 2014-02-24 | 2014-06-04 | 广东美的厨房电器制造有限公司 | Fan blade capable of blowing air in diffused mode and fan blade support |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130401 Granted publication date: 20040714 |