Middle-bent axial flow fan blade
An axial flow fan and blade technology, applied in the field of blade bending structure
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[0014] The present invention will be further described below in conjunction with the accompanying drawings.
[0015] Such as figure 1 , figure 2 As shown, an axial flow fan blade with a bent middle part of the blade includes a hub 1 and a blade 2. The blade 2 includes an outer circumference 21, a leading edge 22 and a trailing edge 23. The blades 2 are arranged in the radial direction, A continuous crest 3, trough 4 undulation from the leading edge to the trailing edge.
[0016] The peaks 3 and troughs 4 are within the range from the vane located close to 80% of the outer circumference to the 95% of the outer circumference.
[0017] The bending width of the crest 3 or trough 4 is 10%D≤B≥5%D. D is the diameter of the wind wheel; B is the width of the bend.
[0018] The tops of the peaks 3 and the bottoms of the troughs 4 are obtuse angles.
[0019] The tops of the crests and the bottoms of the troughs may also have rounded corners.
[0020] Under the same conditions, to ...
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