CN2360656Y - Blade of using high lift force and low noise wing - Google Patents
Blade of using high lift force and low noise wing Download PDFInfo
- Publication number
- CN2360656Y CN2360656Y CN 98251781 CN98251781U CN2360656Y CN 2360656 Y CN2360656 Y CN 2360656Y CN 98251781 CN98251781 CN 98251781 CN 98251781 U CN98251781 U CN 98251781U CN 2360656 Y CN2360656 Y CN 2360656Y
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- Prior art keywords
- lift
- blade
- coefficient
- low noise
- aerofoil profile
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Abstract
The utility model relates to a wing-shaped blade of using high lift force and low noise wing, wherein, the cross section shape of which forms a wing shape, which is the wing shape to satisfy required lift coefficient and lift-drag ratio conditions within the range of reynolds number which is 1*10< 5 >-8*10< 5 >. The lift coefficient is not less than 1.05, and the lift-drag ratio is not less than 110. The load distribution delta Cu of the blade, a mounting angle beta and a chord length C are five-power curves of a rotation radius R. The utility model has large air quantity, high wind pressure, low noise, high efficiency and light weight.
Description
The utility model relates to a kind of blade that uses high-lift low noise aerofoil profile, relates in particular to the blade that a kind of axial-flow blower adopts.
At present, existing many axial-flow blowers adopt the aerofoil profile blades, are early stage aviation aerofoil profiles both at home and abroad but it adopts mostly, and existing major defect is:
1, owing to it is not to aim at blower fan design, maximum lift coefficient is little under the reynolds' number of blower fan work, thereby makes that the blade chord length is longer, and the blade volume is big, and Heavy Weight, cost of production are also higher;
2, the blade maximum lift coefficient is little, and the fan delivery that causes it to make is little, and blast is low;
3, blade lifting resistance ratio is low, and the operation point is many to make that at high Reynolds coefficient place the efficient of blower fan is lower, causes great energy waste;
What 4, Blade Design adopted is the binary method, need make multiple hypothesis, and blower fan does not reach desirable technical order;
6, noise is bigger, often need install silencing apparatus additional to reduce noise.
The purpose of this utility model is to avoid above-mentioned deficiency of the prior art, and a kind of air quantity is big, blast is high, noise is low, efficient is high, the blade of lightweight use high-lift low noise aerofoil profile and provide.
Design proposal of the present utility model is as follows:
A kind of blade that uses high-lift low noise aerofoil profile, its shape of cross section are aerofoil profile, and the load distribution of this blade is Δ Cu, and established angle is β, and chord length is C, and its special way is: described aerofoil profile be work reynolds' number be 1 * 10
5～8 * 10
5Satisfy the lift coefficient that requires, the aerofoil profile of ratio of lift coefficient to drag coefficient condition, described lift coefficient 〉=1.05, described ratio of lift coefficient to drag coefficient 〉=110 in the scope; Described load distribution Δ Cu is the five power curves of turning radius R:
Δ Cu=17.71R-36.85R
2+ 153.85R
3-240.59R
4+ 107.99R
5Described established angle β is the five power curves of turning radius R:
β=689.1R-2858.0R
2+ 4873.0R
3-3774.0R
4+ 1096.0R
5: described chord length C is the five power curves of turning radius R:
C＝1.180R-1.603R
2+3.280R
3-4.447R
4+1.887R
5。
Work Reynolds coefficient of the present utility model can be 1 * 10
5
Lift coefficient of the present utility model can be 1.1.
Ratio of lift coefficient to drag coefficient of the present utility model can be 120.
The accompanying drawing drawing is described as follows:
Fig. 1 is the utility model blade shape schematic representation;
Fig. 2 is the A-A sectional view of the utility model blade.
The utility model is described in further detail below in conjunction with accompanying drawing:
Referring to Fig. 1, the shape of cross section of the utility model blade Y is an aerofoil profile, and this aerofoil profile is a high-lift, and the low noise aerofoil profile uses the three-dimensional flow method to design.When air flow stream was crossed blade, the variation of air current flow speed and pressure was mild, resistance is littler; Evener straight along the radial direction air-flow, disturb little, mobile more reasonable.Thereby can make blower fan have better performance index.Blade Y is along turning radius direction R transformation load distribution Δ Cu, established angle β, chord length C.Aerofoil profile of the present utility model be work reynolds' number be 1 * 10
6～8 * 10
6Satisfy the lift coefficient that requires, the aerofoil profile of ratio of lift coefficient to drag coefficient condition, the described ratio of lift coefficient to drag coefficient of described lift coefficient 〉=1.05. 〉=110 in the scope; Described load distribution Δ Cu is the five power curves of turning radius R:
Δ Cu=17.71R-36.85R
2+ 153.85R
3-240.59R
4+ 107.99R
5Described established angle β is the five power curves of turning radius R:
β=689.1R-2858.0R
2+ 4873.0R
3-3774.0R
4+ 1096.0R
5Described chord length C is the five power curves of turning radius R:
C＝1.180R-1.603R
2+3.280R
3-4.447R
4+1.887R
5。When determining lift coefficient, ratio of lift coefficient to drag coefficient, the blade relative thickness is desirable 11.5%, and camber is desirable 4.5, draws concrete air foil shape by the Airfoil Design principle then.If specific (special) requirements is arranged, can be with the relative thickness and relative camber of aerofoil profile, in ± 5% scope, change respectively or simultaneously, torsional angle and chord length are remained unchanged simultaneously along radial direction, blade is with one angle and certain speed rotation during work, by blade air-flow is done work, air-flow direction and speed is on request flowed.
The utility model compared with prior art has following advantage:
Adopt high-lift, low noise, low Reynolds number airfoil and more rational pneumatic load to distribute so that axial flow wind Facility have that air quantity is big, blast is high, noise is low, the efficient advantages of higher. And this kind aerofoil profile can reduce blade Chord length, thereby can economical with materials, alleviate blower fan weight, reduce production costs. For the fan blade worker The lower actual conditions of Reynolds number when doing, the utility model are designed to be applicable to the high-lift, low of low reynolds number The aerofoil profile of resistance, high lift-drag ratio; Adopt simultaneously low noise design principle, make it to become a low noise wing, Thereby the aerodynamic noise that blade itself is produced is littler, reduces fan noise from the noise source. Adopt ternary Design Method of Fan. More rational air-flow and the distribute loads organized of binary methods that it is commonly used at present, thereby Make blower fan have good performance. Because wing section lift coefficient of the present utility model is big, so that blower fan can produce Give birth to big air quantity and high pressure. Because the utility model aerofoil profile resistance coefficient is little, so the lift-drag ratio height is wind The power consumption of machine is little, the efficient height.
Claims (4)
1, a kind of blade that uses high-lift low noise aerofoil profile, its shape of cross section is an aerofoil profile, the load distribution of this blade is Δ Cu, established angle is β, chord length is C, it is characterized in that: described aerofoil profile be work reynolds' number be 1 * 10
5～8 * 10
5Satisfy the lift coefficient that requires, the aerofoil profile of ratio of lift coefficient to drag coefficient condition, described lift coefficient 〉=1.05, described ratio of lift coefficient to drag coefficient 〉=110 in the scope; Described load distribution Δ Cu is the five power curves of turning radius R:
Δ Cu=17.71R-36.85R
2+ 153.85R
3-240.59R
4+ 107.99R
5Described established angle β is the five power curves of turning radius R:
β=689.1R-2858.0R
2+ 4873.0R
3-3774.0R
4+ 1096.0R
5Described chord length C is the five power curves of turning radius R:
C＝1.180R-1.603R
2+3.280R
3-4.447R
4+1.887R
5。
2, the blade of use high-lift low noise aerofoil profile as claimed in claim 1 is characterized in that: described work Reynolds coefficient is 1 * 10
6
3, the blade of use high-lift low noise aerofoil profile as claimed in claim 1 or 2, it is characterized in that: described lift coefficient is 1.1.
4, the blade of use high-lift low noise aerofoil profile as claimed in claim 3, it is characterized in that: described ratio of lift coefficient to drag coefficient is 120.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98251781 CN2360656Y (en) | 1998-12-31 | 1998-12-31 | Blade of using high lift force and low noise wing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98251781 CN2360656Y (en) | 1998-12-31 | 1998-12-31 | Blade of using high lift force and low noise wing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2360656Y true CN2360656Y (en) | 2000-01-26 |
Family
ID=33995628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98251781 Expired - Fee Related CN2360656Y (en) | 1998-12-31 | 1998-12-31 | Blade of using high lift force and low noise wing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2360656Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100425129C (en) * | 2006-11-14 | 2008-10-15 | 中国水产科学研究院黄海水产研究所 | Method for establishing selection index for breeding Chinese prawn in multiple characters |
| CN100441881C (en) * | 2004-07-06 | 2008-12-10 | 斯佩尔汽车有限公司 | Axial fan |
-
1998
- 1998-12-31 CN CN 98251781 patent/CN2360656Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100441881C (en) * | 2004-07-06 | 2008-12-10 | 斯佩尔汽车有限公司 | Axial fan |
| CN100425129C (en) * | 2006-11-14 | 2008-10-15 | 中国水产科学研究院黄海水产研究所 | Method for establishing selection index for breeding Chinese prawn in multiple characters |
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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 |