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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- impeller
- angle
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- Expired - Lifetime
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- 238000005452 bending Methods 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 2
- 238000005266 casting Methods 0.000 claims 1
- 230000007423 decrease Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 238000002474 experimental method Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000009423 ventilation Methods 0.000 abstract description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
本实用新型公开了一种具有前弯叶片的轴流通风机叶轮。该叶轮包括轮毂和多个机翼叶型或者圆弧板叶型叶片，叶片环绕轮毂设置，所述叶片沿其旋转方向前弯，叶片各截面的前弯角从叶根到叶尖连续增加，叶根截面的前弯角为零，叶尖截面的前弯角最大；所述叶片向进气方向前掠。本实用新型的优点在于通过叶片的弯掠角，控制和抑止了叶片表面边界层的分离，减小了叶片的损失从而提高了风机的效率，也从而降低了气动噪声。通过模型级实验，本实用新型的风机噪声低，流动损失小，效率高。本实用新型可广泛应用于工业和民用的通风换气和工艺流程。
The utility model discloses an axial fan impeller with forward curved blades. The impeller includes a hub and a plurality of airfoil blades or arc-shaped blades. The blades are arranged around the hub. The blades are bent forward along the direction of rotation, and the forward bending angle of each section of the blades increases continuously from the root to the tip. The forward bending angle of the blade root section is zero, and the forward bending angle of the blade tip section is the largest; the blade is swept forward toward the air intake direction. The advantage of the utility model is that the separation of the boundary layer on the surface of the blade is controlled and suppressed through the sweep angle of the blade, the loss of the blade is reduced, the efficiency of the fan is improved, and the aerodynamic noise is also reduced. Through model-level experiments, the fan of the utility model has low noise, small flow loss and high efficiency. The utility model can be widely used in industrial and civil ventilation and process flow.
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)
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 |
| 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 |
| 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 |
-
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 |
| 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 |
| 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 |
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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 |