CN2470590Y - Axial-flow fan - Google Patents
Axial-flow fan Download PDFInfo
- Publication number
- CN2470590Y CN2470590Y CN 01217590 CN01217590U CN2470590Y CN 2470590 Y CN2470590 Y CN 2470590Y CN 01217590 CN01217590 CN 01217590 CN 01217590 U CN01217590 U CN 01217590U CN 2470590 Y CN2470590 Y CN 2470590Y
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- China
- Prior art keywords
- blade
- radius
- flow fan
- chord length
- wheel rim
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Abstract
本实用新型涉及一种轴流风扇,特别是汽车发动机冷却用轴流风扇。它包括有轮毂、轮圈和叶片,其叶片向同一方向扭曲,并有5°—20°的前掠角,每个叶片的弦长随其半径的增大而增大,增大值满足0<(b2-b1)/b1≤20%。叶片扭心线为圆弧线,圆弧半径是轮圈内半径的1.1～1.3倍,其圆心在同一圆周上。本轴流风扇充分利用半径较大处其作功能力强的优势,增大了风量、提高了效率,也提高冷却效果。在保持风量不变的情形下,将降低功耗。
The utility model relates to an axial flow fan, in particular to an axial flow fan for cooling an automobile engine. It includes a hub, a rim and blades, the blades are twisted in the same direction, and have a forward sweep angle of 5°-20°, the chord length of each blade increases with the increase of its radius, and the increase value satisfies 0 <(b 2 -b 1 )/b 1 ≤20%. The twisting center line of the blade is an arc line, the radius of the arc is 1.1 to 1.3 times the inner radius of the rim, and the center of the arc is on the same circumference. The axial flow fan makes full use of the advantage of strong working ability at the larger radius, increases the air volume, improves the efficiency, and also improves the cooling effect. In the case of keeping the air volume constant, the power consumption will be reduced.
Description
The utility model relates to a kind of axial fan, particularly is applied to the axial fan of car engine cooling system.
Axial fan has obtained very using widely in the prior art.In order to make blow out distinguished and admirable soft, even, normally circular rector Design Mode such as employing is about to its fan blade design and will become inner wide and outer narrow shape, and the chord length of blade is reduced from inside to outside gradually, then its wind speed profile that blows out is more even, in remote course of conveying energy to transport loss little.Disclose a kind of plastic shaft flow fan that is applied to the motor car engine cooling among the CN2248789Y, wherein also used inner wide and outer narrow shape blade.Can find that by the analysis to the aerodynamic characteristic of this blade its power consumption penalty is bigger than normal, this is disadvantageous to motor car engine.
The purpose of this utility model is, a kind of axial fan that is applied to car engine cooling system is provided, and this fan has the blade that is different from the prior art shape, can reduce power consumption penalty.
The purpose of this utility model realizes in the following manner.
Axial fan of the present utility model includes wheel hub, wheel rim and blade, and described blade twists to same direction, and has 5 °-20 ° sweepforward angle, it is characterized in that:
(1) chord length of each blade increases with the increase of its radius, and its increase value satisfies following formula:
0＜(b
2-b
1)/b
1≤20％，
In the formula, b
1The expression blade is at the chord length of wheel hub, b
2The expression blade is in the chord length at wheel rim place;
(2) the torsional centre line of each blade is the circular arc line of same radius, and its radius is 1.1～1.3 times of wheel rim inside radius,
The center of circle of every circular arc is on same circumference, and this round heart is identical with the wheel rim axle center.
Axial fan of the present utility model, the design of the circular rector such as non-of having used the increase of its radius of chord of blade personal attendant and having increased gradually, make full use of the strong advantage of its capacity for work of radius larger part, played the function that increases air quantity, raising fan efficiency, increases cooling effect.In the cooling system of motor car engine, the uniformity of air-flow there is not high request, the air-flow that blows out of its blade does not need remote conveying yet simultaneously.Therefore this design of the present utility model does not have a negative impact to using.Compared to existing technology, the design has increased air quantity under the situation that does not increase power consumption.If keep air quantity constant, then will reduce power consumption, this economizes on oil to motor car engine is very favourable.On the other hand, it is the circular arc line of same radius that the utility model makes the torsional centre line of each blade, and this is more favourable to the boundary layer thickness that reduces blade surface, thereby also can play the effect that reduces overall noise effectively.
Axial fan of the present utility model can be advantageously used in being particularly useful for car in the cooling system of various motor car engines.
Be further described below by embodiment and accompanying drawing thereof.
Fig. 1 is an a kind of embodiment's of the present utility model structural representation.
Among the figure, (1) is wheel hub.(2) be wheel rim.(3) be blade.The torsional centre in this each cross section of blade is positioned at the blade middle part, and its blade chord length increases from inside to outside gradually, b
1The expression blade is at the minimum chord length of wheel hub, b
2The expression blade is in the maximum chord length at wheel rim place, and angle theta is a sweepforward angle.Circular arc dotted line (4) is the line of the different cross section torsional centre of same blade, and r is this radius of arc.The center of circle of the circular arc line of each blade is all on the circumference of same circle (5).
The axial fan of the axial fan of the foregoing description and prior art is respectively installed to carries out testing property on the same sedan car.Concrete data are: the power consumption of the axial fan of present embodiment is 400W, and air quantity is 5705m
3/ h; The power consumption of the axial fan that uses in the prior art is 420W, and air quantity is 5720m
3/ h.The result shows that the axial fan performance of present embodiment is more superior, and near under the suitable situation, power consumption has reduced about 5% at air quantity.Specifically being of a size of of axial fan as the present embodiment of test: the internal diameter of wheel rim is a 300mm (radius R
2Be 150mm), the wheel hub external diameter is a 125mm (radius R
1Be 62.5mm), be evenly equipped with 7 blades, its b
1Be 51mm, b
2Be 59mm, sweepforward angle θ is 8.8 °, and torsional centre circular arc line radius r is 177mm.
Claims (2)
1. an axial fan includes wheel hub, wheel rim and blade, and described blade twists to same direction, and has 5 °-20 ° sweepforward angle, and it is characterized in that: the chord length of each blade increases with the increase of its radius, and its increase value satisfies following formula:
0＜(b
2-b
1)/b
1≤20％，
In the formula, b
1The expression blade is at the chord length of wheel hub, b
2The expression blade is in the chord length at wheel rim place.
2. axial fan as claimed in claim 1, the torsional centre line that it is characterized in that described each blade is the circular arc line of same radius, and its radius is 1.1～1.3 times of wheel rim inside radius, and the center of circle of every circular arc is on same circumference, and this round heart is identical with the wheel rim axle center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01217590 CN2470590Y (en) | 2001-02-22 | 2001-02-22 | Axial-flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01217590 CN2470590Y (en) | 2001-02-22 | 2001-02-22 | Axial-flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2470590Y true CN2470590Y (en) | 2002-01-09 |
Family
ID=33635782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01217590 Expired - Fee Related CN2470590Y (en) | 2001-02-22 | 2001-02-22 | Axial-flow fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2470590Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100445569C (en) * | 2006-01-12 | 2008-12-24 | 上海交通大学 | Traction motor brake cooling system Double impeller axial flow fan |
| CN100445568C (en) * | 2006-01-12 | 2008-12-24 | 上海交通大学 | Traction motor brake cooling system single impeller axial flow fan |
| CN101427030B (en) * | 2006-03-23 | 2013-01-23 | 法雷奥热系统公司 | Fan impellers, especially for motor vehicles |
| CN110202482A (en) * | 2019-06-21 | 2019-09-06 | 崔云兰 | The superficial treatment system of Automobile Plastic Parts and the process of surface treatment of plastic fittings |
-
2001
- 2001-02-22 CN CN 01217590 patent/CN2470590Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100445569C (en) * | 2006-01-12 | 2008-12-24 | 上海交通大学 | Traction motor brake cooling system Double impeller axial flow fan |
| CN100445568C (en) * | 2006-01-12 | 2008-12-24 | 上海交通大学 | Traction motor brake cooling system single impeller axial flow fan |
| CN101427030B (en) * | 2006-03-23 | 2013-01-23 | 法雷奥热系统公司 | Fan impellers, especially for motor vehicles |
| CN110202482A (en) * | 2019-06-21 | 2019-09-06 | 崔云兰 | The superficial treatment system of Automobile Plastic Parts and the process of surface treatment of plastic fittings |
| CN110202482B (en) * | 2019-06-21 | 2021-08-13 | 无锡贺邦金属制品有限公司 | Surface treatment system for automobile plastic parts and surface treatment process for plastic parts |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |