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Low-noise strong blast volume axial-flow fan

A technology of axial flow fan and large air volume, which is applied in the field of variable displacement pumps, and can solve the problems of large rotating noise of straight blades and large eddy current noise

Inactive Publication Date: 2005-03-23
BAODING BAOLING TRANSFORMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the eddy current generated by the flat blade is relatively large, so the eddy current noise is also relatively large; while the rotation noise of the straight blade is relatively large

Method used

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  • Low-noise strong blast volume axial-flow fan
  • Low-noise strong blast volume axial-flow fan
  • Low-noise strong blast volume axial-flow fan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Embodiment 1: (X, Y in the following parameters 上 , Y 下 Units are in millimeters)

[0082] 1-1 section 2-2 section 3-3 section 4-4 section

[0083] X / B1 (%)X Y 上 Y 下 X Y 上 Y 下 X Y 上 Y 下 X Y 上 Y 下

[0084] 0 0 -34 -34 0 0 0 0 22 22 0 28 28

[0085] 2.5 8.5 -28 -38 10 -6 -38 11 23 14 12 27 18

[0086] 5 17 -25 -39 20 -9 -39 22 22 9 24 25 11

[0087] 10 34 -21 -39 40 -14 -39 44 19 1 47 18 0

[0088] 20 68 -15 -40 79 -21 -40 87 12 -12 94 6 -18

[0089] 30 102 -11 -39 119 -24 -39 131 4 -23 142 -6 -34

[0090] 40 136 -9 -38 159 -27 -38 174 -3 -33 189 -18 -49

[0091] 50 170 -7 -36 198 -29 -39 218 -11 -41 236 -30 -61

[0092] 60 204 -6 -34 238 -25 -34 261 -19 -48 283 -40 -71

[0093] 70 238 -4 -29 278 -16 -33 305 -24 -51 330 -49 -77

[0094] 80 272 -1 -21 318 -11 -27 348 -28 -49 378 -55 -78

[0095]90 306 5-7 357-7-20 392-27-41 425-56-71

[0096] 100 340 15 15 397 0 0 435 -23 -23 472 -55 -55.

Embodiment 2

[0097] Embodiment 2: (in the following parameters X, Y 上 , Y 下 Units are in millimeters)

[0098] 1-1 section 2-2 section 3-3 section 4-4 section

[0099] X / B1 (%)X Y 上 Y 下 X Y 上 Y 下 X Y 上 Y 下 X Y 上 Y 下

[0100] 0 0 -34 -34 0 0 0 0 22 22 0 28 28

[0101] 2.5 8.5 -29 -39 10 -7 -39 11 24 15 12 28 19

[0102] 5 17 -26 -40 20 -10 -40 22 23 10 24 26 12

[0103] 10 34 -22 -40 40 -15 -40 44 20 2 47 19 1

[0104] 20 68 -16 -41 79 -22 -41 87 13 -13 94 7 -19

[0105] 30 102 -12 -40 119 -25 -40 131 5 -24 142 -7 -35

[0106] 40 136 -10 -39 159 -28 -39 174 -4 -34 189 -19 -50

[0107] 50 170 -8 -37 198 -30 -40 218 -12 -42 236 -31 -62

[0108] 60 204 -7 -35 238 -26 -35 261 -20 -49 283 -41 -72

[0109] 70 238 -5 -30 278 -17 -34 305 -25 -52 330 -50 -78

[0110] 80 272 -2 -22 318 -12 -28 348 -29 -50 378 -56 -79

[0111] 90 306 6-8 357-8-21 392-28-42 425-57-72

[0112] 100 340 15 15 397 0 0 435 -23 -23 472 -56 -55,

[0113] The above parameters are rou...

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Abstract

The invention relates to a pumping current blower fan with low noise and high wind rate, which belongs to non-positive-displace pump technical field. The shape of fan blade is back-swept, and its sectional plane is airfoil. The especial is that central axis is the center of rotation of the vane, it is cut by different radius cylinder face, geometry of the vane is fixed on by the numerical value of the chord An which is from the vane leading edge to its slurry radix axle wire, chord is spread by the sectional plane, X and Y in the sectional plane airfoil developed pattern. The advantage of the invention is big air output, low noise, high static pressure, and light weight.

Description

technical field [0001] The invention relates to a ventilation device, in particular to an axial flow fan, and belongs to the technical field of non-variable pumps. Background technique [0002] Fan is a machine used to convey gas. Axial flow fan is widely used in all walks of life because of its simple structure, convenient manufacture, and large flow rate, especially in ventilation occasions that require low power. How to improve fan efficiency and reduce noise is the goal of this type of fan research. The noise of the fan is mainly aerodynamic noise, which is the gas pulsation sound caused by the vibration of the gas caused by the impact of the gas and the vortex during the high-speed rotation of the blade. According to the different mechanism of dynamic noise, it can be divided into rotating (impact) noise and eddy current noise. The vortex noise is caused by the turbulent boundary layer and vortex splitting and detaching caused by the airflow passing through the blade,...

Claims

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Application Information

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IPC IPC(8): F04D25/08F04D29/02F04D29/38F04D29/66
Inventor 王敬国汪蓓蓓蔡向东曹力电
Owner BAODING BAOLING TRANSFORMER
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