CN2721930Y - Low-noise axial-flow fan with big blowing rate - Google Patents
Low-noise axial-flow fan with big blowing rate Download PDFInfo
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- CN2721930Y CN2721930Y CN 200420016675 CN200420016675U CN2721930Y CN 2721930 Y CN2721930 Y CN 2721930Y CN 200420016675 CN200420016675 CN 200420016675 CN 200420016675 U CN200420016675 U CN 200420016675U CN 2721930 Y CN2721930 Y CN 2721930Y
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Abstract
The utility model discloses a low-noise axial-flow fan with big blowing rate belonging to the technical field of the non-positive displacement pump. The utility model is used for solving the problems that the axial-flow fan reduces the noise and raises the efficiency. The blade of a fan is rear sweeping shape; section shape of the blade is air foil; after improvement, the rotary center of the blade serves as a central shaft and the different radial column face can cut the blade; after spreading each section, the string length of each spreading section is Bn and the string length of the central line from the front edge of the blade to the blade root of the blade is AnAThe AnABn values and the X value and the Y value in the spreading picture of the section air foil can ascertain the geometric shape of the blade. The utility model can effectively reduce the whirlpool noise and the striking noise by the desigh for the profile of the blade and the air foil of the section. The blade adopting the double-layer composite material can raise the rigidity and the intensity of the blade; can reduce the weight, and can reduce the deformation in process of high-speed rotation. After the comparative test, comprared the utility model with the same fan, the result indicates that the utility model is large in blowing rate, low in noise, high in static pressure, and light in weight.
Description
Technical field
The utility model relates to a kind of ventilation equipment, and particularly a kind of axial-flow blower belongs to non-displacement pump technical field.
Background technique
Blower fan is the fluid machinery of conveying gas, promptly the mechanical energy of prime mover input is changed into the machinery that gas kinetic energy and pressure can be exported.Axial fan is widely used in all trades and professions with characteristics such as it are simple in structure, easily manufactured, flow is big for a long time, especially requires the little ventilation occasion of power.The efficient, the reduction noise that how to improve blower fan are the targets of this class blower fan research.Fan noise is based on aerodynamic noise, and this is because blade in the process of high speed rotating, is subjected to reasons such as gas percussion and eddy current, makes gas produce the caused air pulsing sound of vibration.Show that by aerodynamic studies the size of fan efficiency and noise and the aerodynamic characteristic of impeller are closely related, and the geometrical shape of blade is the principal element of decision impeller aerodynamic characteristic to axial-flow blower.The eddy current that produces as plate shaped blade is bigger, so eddy current crack is also bigger; And straight-vaned impact noise is bigger.Therefore, rationally improving the fan blade geometrical shape, is the effective means that reduces noise, increases air quantity.
Summary of the invention
Provide a kind of thereby the utility model is used to overcome the defective of prior art and change the big air quantity axial-flow blower of low noise that the blade surface airflow characteristic effectively reduces noise, increases air quantity by changing blade geometric shape.
The alleged problem of the utility model solves with following technical proposals:
The big air quantity axial-flow blower of a kind of low noise, form by housing and blade, blade is a sweepback, its sectional shape is a wing blade, its specialization is: the geometrical shape of described blade is determined by following parameter: with the center of rotation of blade 5 be central shaft, with the cylndrical surface cut blade of 4 different radiis, each cross section of gained is launched again, respectively launched cross section chord length Bn and blade inlet edge 7 to blade slurry root medial axis 6 chord length An, its numerical value is as follows respectively:
1-1 cross section: R1=240mm B1=340mm A1=199mm
2-2 cross section: R2=293mm B2=397mm A2=195mm
3-3 cross section: R3=346mm B3=435mm A3=162mm
4-4 cross section: R4=400mm B4=472mm A4=114mm
The sectional shape of blade is determined by following parameter: setting up plane right-angle coordinate on each cross section unfolded drawing, is the true origin of X-axis with the blade inlet edge, is the Y-axis true origin with blade slurry root medial axis, and the coordinate figure of each cross section respective point is:
1-1 cross section: X/B1 (%) X (mm) Y
On(mm) Y
Down(mm)
0 0 -34 -34
2.5 8.5 -28～-29 -38～-39
5 17 -25～-26 -39～-40
10 34 -21～-22 -39～-40
20 68 -15～-16 -40～-41
30 102 -11～-12 -39～-40
40 136 -9～-10 -38～-39
50 170 -7～-8 -36～-37
60 204 -6～-7 -34～-35
70 238 -4～-5 -29～-30
80 272 -1～-2 -21～-22
90 306 5～6 -7～-8
100 340 15 15
2-2 cross section: X/B2 (%) X (mm) Y
On(mm) Y
Down(mm)
0 0 0 0
2.5 10 -6～-7 -38～-39
5 20 -9～-10 -39～-40
10 40 -14～-15 -39～-40
20 79 -21～-22 -40～-41
30 119 -24～-25 -39～-40
40 159 -27～-28 -38～-39
50 198 -29～-30 -39～-40
60 238 -25～-26 -34～-35
70 278 -16～-17 -33～-34
80 318 -11～-12 -27～-28
90 357 -7～-8 -20～-21
100 397 0 0；
3-3 cross section: X/B3 (%) X (mm) Y
On(mm) Y
Down(mm)
0 0 22 22
2.5 11 23～24 14～15
5 22 22～23 9～10
10 44 19～20 1～2
20 87 12～13 -12～-13
30 131 4～5 -23～-24
40 174 -3～-4 -33～-34
50 218 -11～-12 -41～-42
60 261 -19～-20 -48～-49
70 305 -24～-25 -51～-52
80 348 -28～-29 -49～-50
90 392 -27～-28 -41～-42
100 435 -23 -23；
4-4 cross section: X/B4 (%) X (mm) Y
On(mm) Y
Down(mm)
0 0 28 28
2.5 12 27～28 18～19
5 24 25～26 11～12
10 47 18～19 0～1
20 94 6～7 -18～-19
30 142 -6～-7 -34～-35
40 189 -18～-19 -49～-50
50 236 -30～-31 -61～-62
60 283 -40～-41 -71～-72
70 330 -49～-50 -77～-78
80 378 -55～-56 -78～-79
90 425 -56～-57 -71～-72
100 472 -55 -55。
The big air quantity axial-flow blower of above-mentioned low noise, described blade is made of outside focce-bearing layer 10 and inner packing material 11, and described focce-bearing layer is a fiber-reinforced plastic layer, and inner packing material is a polyurethane foam.
The big air quantity axial-flow blower of above-mentioned low noise, the thickness of described blade focce-bearing layer is successively decreased to blade tip by root of blade, 9～11 millimeters of root focce-bearing layer thickness, 2～4 millimeters of tip focce-bearing layer thickness.
The utility model improves the blade of axial-flow blower, and its characteristics are mainly reflected in following aspect: 1. pass through the wing design of blade profile, the air-flow of the blade surface of flowing through when making the blade high speed rotating can form less eddy current, thereby reduces eddy current crack; 2. adopt wide-angle sweepback blade profile, can effectively reduce the impact of blade and air-flow, reduce impact noise; 3. blade adopts double-layer composite material to make, and can improve blade stiffness and intensity, alleviates the blade deadweight, and the distortion when reducing the blade high speed rotating makes blade rotation more steady.Show that through comparative trial the utility model is compared with similar blower fan, noise is little, air quantity is big, static pressure is high, in light weight, is particularly useful for transformer cooler.
Description of drawings
Fig. 1 is the blade structure schematic representation;
Fig. 2 is the wing unfolded drawing of blade profile;
Fig. 3 is a blade assembling schematic representation.
Each parts label is among the figure: 1-1,2-2,3-3,4-4 represent with the radius to be 4 cylndrical surface of R1, R2, R3, R4 and the cross section of blade cut gained respectively; 5. blade; 6. blade is starched the root medial axis; 7. blade inlet edge; 8. trailing edge; 9. blade is starched root; 10. focce-bearing layer; 11. encapsulant layer.
Embodiment
Referring to Fig. 1, Fig. 2, blade 5 of the present utility model is a kind of wide-angle sweepback type blades, and blade geometric shape can be determined by the numerical value of X and Y in the wing unfolded drawing in parameters R n, An, Bn and cross section.Wherein, Rn be with the cylndrical surface radius of blade rotation center coaxial line, with the cylndrical surface cut blade of these different radiis, again each cross section of gained is launched, respectively launched cross section chord length Bn and blade inlet edge 7 chord length An to blade slurry root medial axis 6.According to the numerical value of X and Y in the wing unfolded drawing of numerical value and cross section of blade slurry root medial axis, An, can determine the position of the several points of blade inlet edge, with these several profiles that promptly obtain blade inlet edge 7 that connect by smoothed curve.According to the numerical value of X, Y in the wing unfolded drawing of numerical value and cross section of blade inlet edge An, Bn, the geometric profile of trailing edge 8 can also be determined (promptly according to the recovery of the wing sectional view of aviation with draw principle).
Mounted blade of the present utility model is wing to be airfoil, Figure 3 shows that with the radius to be the cylndrical surface cut blade of Rn, resulting cross section is launched, the wing unfolded drawing in cross section that forms, this figure is placed a plane right-angle coordinate, with the blade inlet edge is the true origin of X-axis, is the Y-axis true origin with blade slurry root medial axis, and what record blade airfoil has a related parameter Y
On, Y
Down,,, can determine the spatial geometric shape of blade airfoil the smooth connection of determining by these parameters of spatial point in conjunction with Rn, An, Bn parameter.When n=4, the parameter of 4 tangent planes as described above.Amplify with the geometric similarity ratio according to above-mentioned parameter or with above-mentioned parameter or dwindle and the blade produced can also be realized the utility model noise abatement sound, increase the effect of air quantity, so in the people's protection domain of the present utility model that all falls.
Still referring to Fig. 3, be rigidity and the intensity that improves blade, and reduce the deadweight of blade as far as possible, blade adopt the peripheral hardware focce-bearing layer and in establish encapsulant layer structure, focce-bearing layer adopts fiber reinforced plastic, inner packing material is a polyurethane foam.Consider that each position stressing conditions of blade does not wait, the thickness of focce-bearing layer is successively decreased to blade tip by root of blade, 9～11 millimeters of root focce-bearing layer thickness, 2～4 millimeters of tip focce-bearing layer thickness.
Several embodiments are provided below:
During n=4, the size of Rn, An, Bn is respectively: R1=240mm, B1=340mm, A1=199mm; R2=293mm, B2=397mm, A2=195mm; R3=346mm, B3=435mm, A3=162mm; R4=400mm, B4=472mm, A4=114mm.
X, Y in the embodiment 1:(following parameters
On, Y
DownUnit be the millimeter)
4-4 cross section, 3-3 cross section, 2-2 cross section, 1-1 cross section
X/B1 (%) X Y
OnY
DownX Y
OnY
DownX Y
OnY
DownX Y
OnY
Down
0 0 -34 -34 0 0 0 0 22 22 0 28 28
2.5 8.5 -28 -38 10 -6 -38 11 23 14 12 27 18
5 17 -25 -39 20 -9 -39 22 22 9 24 25 11
10 34 -21 -39 40 -14 -39 44 19 1 47 18 0
20 68 -15 -40 79 -21 -40 87 12 -12 94 6 -18
30 102 -11 -39 119 -24 -39 131 4 -23 142 -6 -34
40 136 -9 -38 159 -27 -38 174 -3 -33 189 -18 -49
50 170 -7 -36 198 -29 -39 218 -11 -41 236 -30 -61
60 204 -6 -34 238 -25 -34 261 -19 -48 283 -40 -71
70 238 -4 -29 278 -16 -33 305 -24 -51 330 -49 -77
80 272 -1 -21 318 -11 -27 348 -28 -49 378 -55 -78
90 306 5 -7 357 -7 -20 392 -27 -41 425 -56 -71
100 340 15 15 397 0 0 435 -23 -23 472 -55 -55
X, Y in the embodiment 2:(following parameters
On, Y
DownUnit is millimeter)
4-4 cross section, 3-3 cross section, 2-2 cross section, 1-1 cross section
X/B1 (%) X Y
OnY
DownX Y
OnY
DownX Y
OnY
DownX Y
OnY
Down
0 0 -34 -34 0 0 0 0 22 22 0 28 28
2.5 8.5 -29 -39 10 -7 -39 11 24 15 12 28 19
5 17 -26 -40 20 -10 -40 22 23 10 24 26 12
10 34 -22 -40 40 -15 -40 44 20 2 47 19 1
20 68 -16 -41 79 -22 -41 87 13 -13 94 7 -19
30 102 -12 -40 119 -25 -40 131 5 -24 142 -7 -35
40 136 -10 -39 159 -28 -39 174 -4 -34 189 -19 -50
50 170 -8 -37 198 -30 -40 218 -12?-42 236 -31 -62
60 204 -7 -35 238 -26 -35 261 -20?-49 283 -41 -72
70 238 -5 -30 278 -17 -34 305 -25?-52 330 -50 -78
80 272 -2 -22 318 -12 -28 348 -29?-50 378 -56 -79
90 306 6 -8 357 -8 -21 392 -28?-42 425 -57 -72
100 340 15 15 397 0 0 435 -23?-23 472 -56 -55。
Claims (3)
1. big air quantity axial-flow blower of low noise, form by housing and blade, blade is a sweepback, its sectional shape is a wing blade, it is characterized in that: the geometrical shape of described blade is determined by following parameter: with the center of rotation of blade (5) be central shaft, with the cylndrical surface cut blade of 4 different radiis, each cross section of gained is launched again, respectively launched cross section chord length Bn and blade inlet edge (7) to blade slurry root medial axis (6) chord length An, its numerical value is as follows respectively:
(1-1) cross section: R1=240mm B1=340mm A1=199mm
(2-2) cross section: R2=293mm B2=397mm A2=195mm
(3-3) cross section: R3=346mm B3=435mm A3=162mm
(4-4) cross section: R4=400mm B4=472mm A4=114mm
The sectional shape of blade is determined by following parameter: setting up plane right-angle coordinate on each cross section unfolded drawing, is the true origin of X-axis with the blade inlet edge, is the Y-axis true origin with blade slurry root medial axis, and the coordinate figure of each cross section respective point is:
(1-1) cross section: X/B1 (%) X Y
OnY
On
0 0 -34 -34
2.5 8.5 -28～-29 -38～-39
5 17 -25～-26 -39～-40
10 34 -21～-22 -39～-40
20 68 -15～-16 -40～-41
30 102 -11～-12 -39～-40
40 136 -9～-10 -38～-39
50 170 -7～-8 -36～-37
60 204 -6～-7 -34～-35
70 238 -4～-5 -29～-30
80 272 -1～-2 -21～-22
90 306 5～6 -7～-8
100 340 15 15
(2-2) cross section: X/B2 (%) X Y
OnY
Down
0 0 0 0
2.5 10 -6～-7 -38～-39
5 20 -9～-10 -39～-40
10 40 -14～-15 -39～-40
20 79 -21～-22 -40～-41
30 119 -24～-25 -39～-40
40 159 -27～-28 -38～-39
50 198 -29～-30 -39～-40
60 238 -25～-26 -34～-35
70 278 -16～-17 -33～-34
80 318 -11～-12 -27～-28
90 357 -7～-8 -20～-21
100 397 0 0；
(3-3) cross section: X/B3 (%) X Y
OnY
Down
0 0 22 22
2.5 11 23～24 14～15
5 22 22～23 9～10
10 44 19～20 1～2
20 87 12～13 -12～-13
30 131 4～5 -23～-24
40 174 -3～-4 -33～-34
50 218 -11～-12 -41～-42
60 261 -19～-20 -48～-49
70 305 -24～-25 -51～-52
80 348 -28～-29 -49～-50
90 392 -27～-28 -41～-42
100 435 -23 -23；
(4-4) cross section: X/B4 (%) X Y
OnY
Down
0 0 28 28
2.5 12 27～28 18～19
5 24 25～26 11～12
10 47 18～19 0～1
20 94 6～7 -18～-19
30 142 -6～-7 -34～-35
40 189 -18～-19 -49～-50
50 236 -30～-31 -61～-62
60 283 -40～-41 -71～-72
70 330 -49～-50 -77～-78
80 378 -55～-56 -78～-79
90 425 -56～-57 -71～-72
100 472 -55 -55
Wherein X, Y
On, Y
OnNumerical value unit is millimeter.
2. the big air quantity axial-flow blower of low noise according to claim 1 is characterized in that: described blade is made of outside focce-bearing layer (10) and inner packing material (11), and described focce-bearing layer is fiber reinforced plastic, and inner packing material is a polyurethane foam.
3. the big air quantity axial-flow blower of low noise according to claim 2, it is characterized in that: the thickness of described blade focce-bearing layer is successively decreased to blade tip by root of blade, 9～11 millimeters of root focce-bearing layer thickness, 2～4 millimeters of tip focce-bearing layer thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420016675 CN2721930Y (en) | 2004-08-19 | 2004-08-19 | Low-noise axial-flow fan with big blowing rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420016675 CN2721930Y (en) | 2004-08-19 | 2004-08-19 | Low-noise axial-flow fan with big blowing rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2721930Y true CN2721930Y (en) | 2005-08-31 |
Family
ID=35012302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420016675 Expired - Lifetime CN2721930Y (en) | 2004-08-19 | 2004-08-19 | Low-noise axial-flow fan with big blowing rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2721930Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316164C (en) * | 2004-08-19 | 2007-05-16 | 保定天威集团有限公司 | Low-noise strong blast volume axial-flow fan |
| CN105697427A (en) * | 2016-01-25 | 2016-06-22 | 李兴君 | Pump body device |
-
2004
- 2004-08-19 CN CN 200420016675 patent/CN2721930Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316164C (en) * | 2004-08-19 | 2007-05-16 | 保定天威集团有限公司 | Low-noise strong blast volume axial-flow fan |
| CN105697427A (en) * | 2016-01-25 | 2016-06-22 | 李兴君 | Pump body device |
| CN105697427B (en) * | 2016-01-25 | 2018-03-06 | 李兴君 | Pump body device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20040819 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |