WO2020073478A1 - Novel fan blade, tail fin and fan structure - Google Patents

Abstract

A fan blade, a tail fin and a fan structure. The fan blade comprises a fan blade body (1); the fan blade body (1) is an elongated body formed by a leeward face (11) and an air guide face (12), the leeward face (11) being an outer inclined arc face provided at the outer side of the fan blade body (1), the air guide face (12) being an inner inclined arc face provided at the inner side of the fan blade body (1), a fan blade cut-off groove (13) being provided at a front end position of the leeward face (11), and the fan blade cut-off groove (13) being provided at a front side position on the outer inclined arc face of the leeward face (11), such that one side of the fan blade cut-off groove (13) is a front leeward face (111), and the other side thereof is a rear leeward face (112). The present fan can effectively reduce the rotational energy consumption of fan blades, reduce the usage noise, and improve the operation performance of the fan blades.

Description

A new fan blade, tail wing and fan structure Technical field

The invention relates to a fan structure, in particular to a fan blade, a tail wing and a fan structure with energy reduction and noise reduction functions.

Background technique

In life, many people will use ceiling fans to cool down, especially in summer when there is a ceiling fan hanging on the roof, it can maximize the cooling air, let the indoor cooling down, and solve the indoor sultry or ventilating effect; but For large spaces in homes, public places or factories, ordinary ceiling fans are inadequate and require large electric fans to solve them. However, large electric fans have large fan blades and high power requirements. This also causes high energy consumption and high noise. technical problem.

Summary of the invention

The purpose of the present invention is to provide a fan blade, a rear wing and a fan structure with energy reduction and noise reduction functions in order to solve the above-mentioned technical problems of the existing fan.

A new fan blade includes a fan blade body. The fan blade body is an elongated body composed of a leeward surface and a wind guide surface. The leeward surface is an outer inclined arc surface provided outside the blade body. The wind guide surface is An inner inclined arc surface provided on the inner side of the blade body, and a blade cut-out groove is provided at the front end position of the leeward surface. The blade cut-out groove is provided at a front position on the outer inclined arc surface of the lee surface to make the fan One side of the leaf flow trough is the front leeward surface, and the other side is the rear leeward surface.

Further, the cross section of the fan blade cut-off groove is arc-shaped, and the fan blade cut-off groove is located at a position of 1 / 5-1 / 3 of the front side of the leeward.

Further, the inner wall of the fan blade groove on the side of the front lee surface is a broken wall, and the inner wall on the side of the rear lee surface is a wind guide wall, and the wind guide wall has a convex arc shape structure. The tangent of the wind guide wall is 15-35 ° to the installation horizontal line L of the blade body.

Further, the cross-section of the fan blade groove is S-shaped.

Further, the back lee surface is lower than the front lee surface.

Further, the blade body is a hollow body, the front part of the blade body is the air inlet side, and the air inlet side is a thicker arc-shaped structure formed by the leeward surface and the front side portion of the wind guide, the blade The other side of the main body is the wind guide side. The wind guide side is a gradually thinning arc-shaped structure formed by the leeward surface and the rear side of the wind guide surface, so that the front and rear parts of the blade body are inclined Curved structure.

Further, the air inlet side is composed of a wind cutting edge with an arc-shaped protrusion on the side of the blade body cross section, an upper transition surface on the upper side of the wind cutting edge, and a lower transition surface on the lower side of the wind cutting edge. The transition surface is the smooth plane with the upper oblique straight surface of the wind cutting edge or the convex arc transitioning to the leeward surface, and the lower transition surface is the smooth plane with the oblique straight surface over the cutting edge or the convex arc transitioning to the wind guiding surface.

Further, the cross section at the intersection of the leeward surface and the front side of the wind guide has an arc-shaped sharp angle, which forms a continuous air inlet structure on the front side of the blade body.

Further, the cross section at the intersection of the leeward surface and the front side of the wind guide has an arc-shaped convex structure, so that the front side of the fan blade body forms a secondary wind-blocking structure.

Further, the wind-guiding side is formed by a thick to thin sheet-like body formed by the intersection of the leeward surface and the wind-guiding surface in an arc shape.

Further, a reinforcement rib is provided in the hollow of the fan blade body.

Further, the hollow position at one end of the blade body forms an installation and fitting opening.

Further, an assembly hole is provided on the leeward surface of the fan blade body, and the assembly hole is located at the position of the fan blade slot.

Further, the size of the thick arc-shaped structure on the air inlet side of the blade body is proportional to the width of the air guide side and inversely proportional to the inclination angle of the air guide side.

Further, on the blade body, the intersection point of the tangent line Q tangent to the front and rear sides of the blade body's wind guide and the installation horizontal line L is defined as the center point O, and between the tangent line Q and the installation horizontal line L The included angle is the blade installation inclination, the distance between the front side of the blade body and the center point O is r, the distance between the tangent point of the arc point tangent to the front side of the wind guide and the center point O is R, and the leeward surface intersects the radius R The tangent point is point A, the connecting line between the center point O and point A is L1, the tangent straight line of the leeward surface at point A is L2, and the intersection angle between L1 and L2 is the static bending angle of the back fan surface A1 ; The tangent point where the wind guide surface intersects the R radius circle is point B, the connecting line between the center point O and point B is L3, the tangent straight line of the leeward surface at point B is L4, and the intersection angle between L3 and L4 is positive The fan's static bending angle B1; at this time, the angle between the tangent line Q tangent to the front and rear sides of the wind guide and the installation horizontal line L is 8-15 °; when the values of r / R are 0.15, 0.2, 0.3, 0.4 , 0.5, 0.6, 0.7, 0.8, 0.9; the static bending angle A1 of the back fan is -36.1 °, -20.2 °, -13.6 °, -10.8 °, -9.3 °, 0 °, 12.7 °, 46.8 °, 8.3 °; Sector corresponding to the static bending angle B1: -24.1 °, -6.7 °, 8.6 °, 9.7 °, 4.2 °, -4 °, -12.8 °, -45.5 °, -7.7 °.

Further, on the blade body, the intersection point of the tangent line Q tangent to the front and rear sides of the blade body's wind guide and the installation horizontal line L is defined as the center point O, and between the tangent line Q and the installation horizontal line L The angle is the inclination of the blade installation, the distance between the front side of the blade body and the center point O is r, the distance between the tangent point of the arc surface tangent and the center point O is R, and the leeward surface intersects the radius circle R The tangent point is point A, the connecting line between center point O and point A is L1, the straight line tangent to the leeward surface arc at point A is L2, and the intersection angle between L1 and L2 is the back fan surface static bending angle A1 ; The tangent point where the wind guide surface intersects the R radius circle is point B, the connecting line between the center point O and point B is L3, the straight line tangent to the leeward surface arc at point B is L4, and the intersection angle between L3 and L4 is positive The fan's static bending angle B1; at this time, the angle between the tangent line Q tangent to the front and rear sides of the wind guide and the installation horizontal line L is 8-15 °; when the values of r / R are 0.15, 0.2, 0.3, 0.4 , 0.5, 0.6, 0.7, 0.8, 0.9; the static bending angle A1 of the back fan surface is -36.1 °, -20.2 °, -13.6 °, -10.8 °, -9.3 °, 0 °, 12.7 °, 23.1 °, 31.4 °; positive Static surface corresponding to the bending angle B1 -24.1 °, -6.7 °, 8.6 °, 9.7 °, 4.2 °, -4 °, -12.8 °, -21.5 °, -30.3 °.

A tail wing of a fan blade includes a tail wing body. The tail wing body is composed of a wing portion and a connecting portion. The wing portion is a wind leaf disposed on one side of the blade body. The wing portion is connected to the blade body through the connecting portion. It has a chamfered structure, and the cross-sectional shape and size of the connecting portion correspond to the blade body. The tail wing body or the upper side of the connecting portion is provided with a tail wing cut-off groove corresponding to the blade cut-out groove on the blade body. The cross-sectional shape and size of the cut-off groove is the same as that of the fan blade.

Further, the tail body is a hollow body, and the connecting portion is provided on one side of the wing portion, the shape and size of the connecting portion corresponds to the shape and size of the cross section of the blade body, and a protrusion is provided on one side of the connecting portion A fixing member, the shape and size of the convex fixing member correspond to the hollow installation and fitting opening of the fan blade body.

Further, the bottom of the wing is thick and the tail is thin, and the inner side of the wing is a slope.

A fan structure includes a rotating motor, a rotating body, a connecting rod and a fan blade. The fan blade is the above-mentioned new fan blade. The size and shape of the connecting rod correspond to the hollow shape of the cross section of the blade body. The blade is tightly fitted and fixed with the connecting rod through a hollow position at one end of the fan blade body.

Further, the connecting rod has a square structure, and the cross-sectional shape of the hollow body of the fan blade body is square.

Further, one end of the fan blade corresponds to the shape and size of the connecting side of the rotating body.

Further, the rotating body is a rotating casing of the rotor on the rotating motor.

Further, the fan blade further includes the above-mentioned rear wing.

The beneficial effects of the invention:

1. The fan blade cut-out groove of the present invention can effectively separate the wind entering the blade from the blade at the position of the cut-out groove, thereby effectively reducing the rotation energy consumption of the blade and at the same time reducing The use of noise significantly improves the performance of fan blades.

2. The back leeward surface of the present invention is lower than the front leeward surface, and the wind guide wall of the fan blade slot is in the shape of a convex arc, so that the wind entering the fan blade is better separated on the flow slot. Avoid the suction of air intake on the fan blades, increase the rotating load of the fan blades, and increase energy consumption.

3. The cross section at the intersection of the leeward surface and the front side of the wind guide of the present invention is an arc-shaped sharp angle, thereby effectively reducing the wind resistance of the fan blade, thereby reducing the energy consumption of the fan blade rotation, and at the same time improving the rotation of the fan blade Rate, effectively improve performance.

4. The cross section at the intersection of the leeward surface and the front side of the wind guide of the present invention is an arc-shaped convex structure, thereby forming a secondary wind-blocking structure on the front side of the blade body, so the wind-blocking performance can be further reduced , And further reduce the energy consumption of the fan blade rotation, increase the rotation rate of the fan blade, and improve the performance more effectively.

5. The tail wing of the present invention is provided with a tail wing cut-off groove, which effectively separates the wind entering the tail wing from the fan blade at the position of the tail wing cut-off groove, thereby effectively reducing the energy consumption of the tail and reducing noise. Significantly improve the performance of the tail.

6. The inner side of the wing portion of the tail wing of the present invention is a slanted surface, thus effectively increasing the wind-inducing effect of the fan blade, so that the fan can effectively increase the air volume of the fan and improve the performance of the fan.

7. The fan blade of the fan of the present invention quickly cooperates with the installation and fitting port formed by the connecting rod and the hollow body of the fan blade, and the installation is simple and convenient, which can effectively increase the performance of the fan, increase the production efficiency, and reduce the production cost.

8. In summary, the fan blade and tail wing structure of the present invention can improve the strength of the fan blade and the aerodynamics of the fan blade to improve the air volume and energy efficiency of the fan. The structure of the fan blade and tail wing can be effectively It can reduce the operating load of the fan, improve the rotation efficiency of the fan, and at the same time reduce the noise of the fan during operation and improve the pollution of the noise to the environment.

BRIEF DESCRIPTION

FIG. 1 is a schematic structural diagram of a fan blade according to Embodiment 1 of the present invention.

FIG. 2 is a top view of the blade of Embodiment 1 of the present invention.

FIG. 3 is a cross-sectional view of FIG. 2.

FIG. 4 is an enlarged schematic view at A of FIG. 3.

5 and 6 are schematic views of the structure of the tail wing of Embodiment 1 of the present invention.

7 is a schematic view of a fan blade structure with a tail wing installed in Embodiment 1 of the present invention.

8 and 9 are schematic views of the installation of the tail fin and the fan blades in Embodiment 1. FIG.

10 is a schematic diagram of the principle of the fan blade of Example 1 of the present invention.

11 is a schematic structural view of a rotating motor, a rotating body, and a connecting rod in a fan according to Embodiment 1 of the present invention.

12 is a schematic structural diagram of a fan according to Embodiment 1 of the present invention.

13 is a schematic diagram of the installation of FIG.

14 is a schematic structural diagram of a fan blade according to Embodiment 2 of the present invention.

detailed description

The present invention will be further described in detail below with reference to the drawings.

Example 1:

Referring to FIGS. 1 to 4, a new fan blade includes a blade body 1. The blade body 1 is an elongated body composed of a leeward surface 11 and a wind guide surface 12. The leeward surface 11 is provided at The outer inclined arc surface of the outer side of the blade body 1, the wind guide surface 12 is an inner inclined arc surface provided on the inner side of the blade body 1, and a louver 13 is provided at the front end of the leeward surface 11. The flow groove 13 is provided at a front position on the outer inclined arc surface of the leeward surface 11, so that one side of the blade cutout groove 13 is the front lee surface 1121 and the other side is the rear lee surface 112.

In the embodiment, the blade body 1 is a hollow body arranged at an oblique angle, the front part of the blade body 1 is the air inlet side 14, and the air inlet side 14 is the front side of the leeward surface 11 and the wind guide surface 12 Partially formed thicker arc-shaped structural part, the other side part of the blade body 1 is the wind guide side 15 which is a gradually thinning arc formed by the leeward surface 11 and the wind guide surface 12 rear side part In the structural part, the front part and the rear part of the blade body 1 form an inclined curved structure.

The air inlet side 14 is composed of an arc-shaped convex wind cutting edge 141 on the upper side of the blade body 1 section, an upper transition surface 142 on the upper side of the wind cutting edge 141, and a lower transition surface 143 on the lower side of the wind cutting edge 141 , The upper transition surface 142 is a smooth plane with an oblique straight surface on the upper side of the wind cutting edge 141 or a convex arc transition to the leeward surface 11, and the lower transition surface 143 is an oblique straight surface on the upper side of the wind cutting edge 141 or a convex arc shape Transition to the smooth plane of the wind guide surface 12. The wind-guiding side 15 is arcuately intersected by the leeward surface 11 and the wind-guiding surface 12 to form a sheet-like body from thick to thin.

The cross section of the fan blade groove 13 is arc-shaped. For example, the cross section of the blade blade groove 13 is S-shaped. Specifically, the cross section of the blade blade groove 13 is an inclined S-shaped smooth surface. The curved curvature of the shape is small, so that the wind entering the blade is easy to fall off the blade body 1 to prevent the wind from being adsorbed on the leeward surface 12 of the blade, so that the energy consumption of the blade rotation can be reduced and the performance can be improved. Furthermore, the fan blade cut-off groove 113 is located at a position of 1 / 5-1 / 3 of the front side of the leeward surface 11, and the inner wall of the part of the fan blade cut-off groove 13 located on the side of the front leeward surface 112 is a cut-off wall 121, the inner wall on the side of the leeward surface 112 is the wind guide wall 122, and the broken section wall 121 is a concave arc shape, which intercepts the wind entering along the leeward surface 112 and then passes through the wind guide wall 122 Leading away from the leeward surface 12, the wind guiding wall 122 has a convex arc shape structure, which can reduce wind resistance. The tangent of the wind guiding wall 122 is 15-35 ° to the installation horizontal line L of the blade body 1.

In order to make the wind entering the leeward surface 11 on the blade easier to fall off the leeward surface 112, the leeward surface 112 is lower than the front leeward surface 112. Specifically, on the installation horizontal line L, the near-blade shut-off groove The highest point of the leeward surface 112 on one side of the 13 is 2-5 mm lower than the front leeward surface 1121 near the other side of the fan blade slot 13.

The cross section at the intersection of the front side of the leeward surface 11 and the air guide surface 12 has an arc-shaped convex structure, like a nipple-like structure, so that the air inlet side 14 of the front side of the blade body 1 forms a secondary de-choke structure. In application, when the blades rotate, the wind enters from the front side of the leeward surface 11 and the wind guide surface 12, because the cross section at the intersection of the leeward surface 11 and the wind guide surface 12 has an arc-shaped convex structure, therefore, The wind first enters the curved convex structure on the front side of the leeward surface 11 and the wind guide surface 12, at this time, the wind resistance is carried out for the first time by the curved convex structure on the front side (that is, the position of the cutting edge 141) Scattered, the rest enter the leeward surface 11 and the wind guide surface 12 from the upper and lower sides respectively. When entering the leeward surface 11 and the wind guide surface 12, the arc-shaped structure (that is, the upper transition surface) in front of the lee surface 11 and the wind guide surface 12 142 and the lower transition surface 143 position) to form the secondary dispersed wind resistance, and then enter the leeward surface 11 and the wind guide surface 12 to form the secondary dispersed wind resistance function. The wind enters the leeward surface after the secondary stepped dispersion wind resistance 11 and the wind guide surface 12, will effectively reduce the resistance of the wind, that is, reduce the rotation resistance of the fan blade, thereby improving the performance.

In order to enhance the strength of the fan blade, and thus be better used on a large fan ceiling fan, the hollow of the fan blade body 1 is provided with a reinforcing rib 18.

In order to facilitate installation, a hollow fitting position 16 is formed at the hollow end of the blade body 1, and an assembly hole 17 is provided on the leeward surface 11 of the blade body 1. The assembly hole 17 is used to install a tail wing by using screws The tail wing is fixed to the rear end of the blade body 1. In order to avoid the resistance and noise easily caused by the exposed assembly screws, the assembly hole 17 is located at the position of the blade break groove 13.

The thicker arc-shaped structure size of the air inlet side 14 of the blade body 1 is proportional to the width of the air guide side 15 and inversely proportional to the inclination angle of the air guide side 15. In application, the air inlet side 14 and the guide The wind side 15 determines the thickness of the air inlet side 14 and the length of the wind guide side 15 and the inclination angle according to the size and power of the fan applied to the fan.

In order to better understand the technical characteristics of the fan blades according to the embodiments of the present invention, further detailed description will be given below. The blade body 1 defines a tangent line between the front side and the rear side of the wind guide surface 12 of the blade body 1 The intersection point of Q and the installation horizontal line L is the center point O, and the angle Q1 between the tangent Q and the installation horizontal line L is the blade installation inclination, and the distance between the front side of the blade body 1 and the center point O is r, The distance between the tangent point of the arc point tangent line of the wind guide surface 12 and the center point O is R, the tangent point of the leeward surface 11 intersecting with the radius circle is the point A, and the connecting line between the center point O and the point A is L1, A The straight line tangent to the arc surface of the leeward surface 11 at the point is L2. The intersection angle between the L1 and L2 is the static bending angle A1 of the back fan surface; The connecting line between point B is L3, the straight line tangent to the arc surface of the wind guide surface 12 at point B is L4, and the intersection angle between L3 and L4 is the static bending angle B1 of the positive fan surface; at this time, the front side of the wind guide surface 12 and The angle Q1 between the tangent line Q on the rear side and the installation horizontal line L is 8-15 °; when the value of r / R is 0.15, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9; back fan The bending angle A1 corresponds to -36.1 °, -20.2 °, -13.6 °, -10.8 °, -9.3 °, 0 °, 12.7 °, 23.1 °, and 31.4 °; the positive bending angle B1 of the corresponding fan surface corresponds to -24.1 °,- 6.7 °, 8.6 °, 9.7 °, 4.2 °, -4 °, -12.8 °, -21.5 °, -30.3 °.

Referring to FIGS. 5 and 6, a tail wing of a fan blade includes a tail wing body 2. The tail wing body 2 is composed of a wing portion 21 and a connecting portion 22. The wing portion 21 is provided on the side of the blade body 1 The wing portion 21 is connected to the blade body 1 through a connecting portion 22 in a folded-angle structure. The cross-sectional shape and size of the connecting portion 22 corresponds to the blade body 1. The tail body 2 or the upper side of the connecting portion 22 A tail wing cut-out groove 23 corresponding to the blade cut-out groove 13 on the blade body 1 is provided. The cross-sectional shape and size of the tail wing cut-off groove 23 is the same as that of the blade cut-out groove 13.

In the embodiment, the tail body 2 is a hollow body, and the connecting portion 22 is provided on the side of the wing portion 21. The shape of the connecting portion 22 corresponds to the shape of the cross section of the blade body 1. The connecting portion 22 A convex fixing piece 24 is provided on one side of the flange, and the shape and size of the convex fixing piece 24 correspond to the hollow mounting and fitting opening 16 of the blade body 1, thereby the tail wing 21 passes through the convex fixing piece 24 of the connecting portion 22 and the blade The body 1 forms a tight fitting structure. The wing portion 21 has a thick bottom portion and a thin tail portion, and the inner side surface of the wing portion 21 is a slant surface, thereby forming an air induction surface.

The specific application of the tail fin is as follows: referring to FIGS. 7 and 9, the tail fin is closely fitted and fixed in correspondence with the mounting and fitting port 16 of the blade body 1 through the convex fixing member 24 of the connecting portion 22, thereby forming a tail fin The structure of the fan blade, which passes through the tail wing, can better increase the air volume of the fan blade and expand the air supply range.

A fan structure using the above-mentioned fan blade and tail fin, as shown in FIGS. 10 to 13, includes a rotating motor 31, a rotating body 32, a connecting rod 33, and a fan blade 34. The fan blade 34 includes the above-mentioned fan blade body 1 and the new blades of the rear wing 2, the size and shape of the connecting rod 33 correspond to the hollow shape and size of the cross section of the blade body 1, the blade 34 is connected to one end of the blade body 1 (such as a hollow hole in a hollow position) The rod 33 is tightly fitted and fixed.

In the embodiment, the connecting rod 33 of the fan structure is a square structure, and the cross-sectional shape of the hollow body of the blade body 1 is square, even if the connecting rod 33 is tightly connected to the hollow hole (ie, the mounting and fitting port 16) on the side of the blade body 1 Fit and then fix with screws or welding. One end of the fan blade 34 corresponds to the shape and size of the connecting side surface of the rotating body 32. That is, one side of the fan blade 34 has an arc shape, and the size of the arc shape corresponds to the side surface of the rotating body 32. The rotating body 32 is a rotating casing of the rotor on the rotating motor 31.

Both the fan blade body 1 and the tail wing 2 can be made of aluminum profiles, and the mounting and fitting port 16 is made of the fan blade body 1 together with the inner cavity (that is, hollow), that is, the mounting and fitting The opening 16 is a hollow hole of the fan blade body 1 having a hollow structure, and the hollow hole serves as a mounting and mating interface for cooperating with the tail wing; the raised fixing piece 24 is made integrally with the inner cavity of the tail wing (ie hollow) when the tail wing is made Of course, you can also use a split structure, such as using a square profile installed at the hollow position of the tail.

When the invention is applied, when the rotating motor 31 drives the fan blade to rotate, the wind enters from the dolphin shape at the front end of the fan blade (that is, enters from the intersection of the front side of the leeward surface 11 and the wind guide surface 12), forming a leeward (leeward surface) 11 wind) and normal wind (that is, the wind on the wind guide surface 12, which is the wind that needs to be used for cooling), where the leeward wind is intercepted by the fan blade slot 1 when it passes through the fan blade slot 1 and does not follow The downward curve (that is, the inclined arc surface of the wind guide surface 12) flows in the radian direction, reducing the wind resistance of the blade and reducing the noise generated. Similarly, the tail chute groove 23 of the tail can also improve the aerodynamics of the blade, reduce The wind resistance of the small wing and the reduction of the generated noise can improve the air volume and energy efficiency of the fan, and at the same time, it can effectively reduce the noise of the fan during operation.

Example 2:

Referring to FIG. 14, the technical feature of this embodiment is that the cross section at the intersection of the front side of the leeward surface 11 and the air guide surface 12 has an arc-shaped sharp angle, like a dolphin-shaped structure, so that the blade body 1 is in front of The side air inlet side 14 forms a continuous air inlet structure, and the rest is the same as the above embodiment.

In order to better understand the technical characteristics of the fan blades according to the embodiments of the present invention, further detailed description will be given below. The blade body 1 defines a tangent line between the front side and the rear side of the wind guide surface 12 of the blade body 1 The intersection point of Q and the installation horizontal line L is the center point O. The angle between the tangent line Q and the installation horizontal line L is the blade installation inclination. The distance between the front side of the blade body 1 and the center point O is r. The distance between the highest point on the front side of the face 12 and the tangent point of the arc tangent to the center point O is R, the tangent point where the leeward surface 11 and the radius circle of R intersect is point A, and the connecting line between the center point O and point A is L1, A The tangent straight line of the leeward surface 11 at the point is L2, and the intersection angle between L1 and L2 is the static bending angle A1 of the back fan surface; the tangent point where the wind guide surface 12 and the R radius circle intersect is the B point, the center point O and The connecting line between point B is L3, the straight line tangent to the wind guide surface 12 at point B is L4, and the intersection angle between L3 and L4 is the static bending angle B1 of the positive fan surface; in this case, the front side of the wind guide surface 12 and The angle between the tangent line Q on the rear side and the installation horizontal line L is 8-15 °; when the value of r / R is 0.15, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9; back fan The bending angle A1 corresponds to -36.1 °, -20.2 °, -13.6 °, -10.8 °, -9.3 °, 0 °, 12.7 °, 46.8 °, and 8.3 °; the static bending angle B1 of the positive sector corresponds to: -24.1 °, -6.7 °, 8.6 °, 9.7 °, 4.2 °, -4 °, -12.8 °, -45.5 °, -7.7 °.

In application, when the blades rotate, the wind enters from the front side of the leeward surface 11 and the wind guide surface 12, because the cross section at the intersection of the leeward surface 11 and the wind guide surface 12 is arc-shaped and sharp, so the wind First, enter at the front of the leeward surface 11 and the wind guide surface 12 at an arc-shaped sharp angle (that is, at the position of the cut edge 141), enter the leeward surface 11 and the wind guide surface 12 from the upper and lower sides, but the wind enters the leeward When the surface 11 and the wind guide surface 12 are under the action of the arc-shaped structure on the front side of the leeward surface 11 and the wind guide surface 12 (that is, the positions of the upper transition surface 142 and the lower transition surface 143), the wind resistance will be effectively reduced , That is, reduce the rotation resistance of the fan blade, thereby improving the performance.

The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the present invention should be included in this Within the scope of protection of the invention.

Claims (24)

1. A new fan blade includes a fan blade body (1). The fan blade body (1) is an elongated body composed of a leeward surface (11) and a wind guide surface (12), and is characterized in that: the leeward surface ( 11) is an outer inclined arc surface provided outside the blade body (1), the wind guide surface (12) is an inner inclined arc surface provided inside the blade body (1), and the position of the front end of the leeward surface (11) is There is a fan blade breaking groove (13), which is provided at the front side position of the outer inclined arc surface of the leeward surface (11), so that the blade blade breaking groove (13) is on one side It is the front leeward surface (111), and the other side is the back leeward surface (112).
2. A new fan blade according to claim 1, characterized in that: the cross section of the fan blade groove (13) is curved, and the fan blade groove (113) is located in front of the lee surface (11) 1 / 5-1 / 3 position.
3. A new fan blade according to claim 1, characterized in that: the inner wall of the fan blade groove (13) on the side of the front lee surface (112) is a broken section wall (121), which is located in the back lee The inner wall of one side of the surface (112) is a wind guide wall (122), and the wind guide wall (122) has a convex arc-shaped structure, and the wind guide wall (122) is tangent to the installation horizontal line of the blade body (1) L is 15-35 °.
4. A new fan blade according to claim 1, characterized in that the cross-section of the fan blade groove (13) is S-shaped.
5. A new fan blade according to claim 1, characterized in that the back leeward surface (112) is lower than the front leeward surface (111).
6. A new fan blade according to claim 1, characterized in that the blade body (1) is a hollow body, and the front part of the blade body (1) is the air inlet side (14), the inlet The wind side (14) is a thicker arc-shaped structural portion formed by the leeward surface (11) and the front side portion of the wind guide surface (12), and the other side portion of the blade body (1) is the wind guide side (15), The wind guiding side (15) is a gradually thinning arc-shaped structural portion formed by the leeward surface (11) and the rear side portion of the wind guiding surface (12), so that the front portion and the rear portion of the blade body (1) are inclined Type curved structure.
7. A new fan blade according to claims 1-6, characterized in that the air inlet side (14) is formed by an arc-shaped cut wind edge (141) on one side of the blade body (1) section , The upper transition surface (142) on the upper side of the wind cutting edge (141) and the lower transition surface (143) on the lower side of the wind cutting edge (141), the upper transition surface (142) is on the wind cutting edge (141) The side inclined straight surface is excessive or the convex arc is excessive to the smooth surface of the leeward surface (11), the lower transition surface (143) is the cut edge (141), and the upper inclined straight surface is excessive or the convex arc is excessive to the wind guide surface (12) ) 'S smooth surface.
8. A new fan blade according to any one of claims 1-6, characterized in that: the cross section at the intersection of the front side of the leeward surface (11) and the wind guide surface (12) is an arc-shaped sharp angle, so that The front side of the fan blade body (1) forms a continuous air intake structure.
9. A new fan blade according to any one of claims 1-6, characterized in that the cross section at the intersection of the front side of the lee surface (11) and the wind guide surface (12) has an arc-shaped convex structure, The front side of the fan blade body (1) is formed into a secondary wind-blocking structure.
10. A new fan blade according to claim 6, characterized in that the wind guide side (15) is arcuately intersected by the leeward surface (11) and the wind guide surface (12) to form a sheet from thick to thin body.
11. A novel fan blade according to claim 1, characterized in that a reinforcement rib (18) is provided in the hollow of the fan blade body (1).
12. A novel fan blade according to claim 1, characterized in that a hollow fitting position (16) is formed at the hollow end of the blade body (1).
13. A new fan blade according to claim 1, characterized in that the leeward surface (11) of the blade body (1) is provided with an assembly hole (17), the assembly hole (17) is located on the blade At the location of the runner (13).
14. A new fan blade according to claim 1, characterized in that: the thicker arc-shaped structure size of the inlet side (14) of the blade body (1) is proportional to the width of the wind guide side (15) , And the inclination angle of the wind guide side (15) is inversely proportional.
15. A new fan blade according to claim 1, wherein the blade body (1) defines a tangent line between the front side and the rear side of the wind guide surface (12) of the blade body (1) The intersection point of Q and the installation horizontal line L is the center point O. The angle between the tangent Q and the installation horizontal line L is the blade installation inclination. The distance between the front side of the blade body (1) and the center point O is r. The distance between the tangent point of the arc tangent to the highest point on the front side of the wind guide surface (12) and the center point O is R, and the tangent point where the leeward surface (11) intersects with the radius circle is point A, and the point between the center point O and A The connecting line is L1, the leeward surface at point A (11), the arc tangent straight line is L2, and the intersection angle between L1 and L2 is the static bending angle of the back fan surface A1; the wind guide surface (12) intersects with the R radius circle The tangent point is point B, the connecting line between center point O and point B is L3, the tangent straight line of the wind guide surface (12) at point B is L4, and the intersection angle between L3 and L4 is the static bending angle B1 of the positive sector;

    At this time, the angle between the tangent line Q tangent to the front side and the rear side of the wind guide surface (12) and the installation horizontal line L is 8-15 °;

    When the value of r / R is 0.15, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9; the static bending angle A1 of the back fan surface is corresponding to -36.1 °, -20.2 °, -13.6 °, -10.8 °, -9.3 °, 0 °, 12.7 °, 46.8 °, 8.3 °; the positive bending angle B1 of the corresponding fan surface is: -24.1 °, -6.7 °, 8.6 °, 9.7 °, 4.2 °, -4 °, -12.8 °, -45.5 °, -7.7 °.
16. A new fan blade according to claim 8, characterized in that: on the blade body (1), a tangent line defining the front side and the rear side of the wind guide surface (12) of the blade body (1) is defined The intersection point of Q and the installation horizontal line L is the center point O. The angle between the tangent line Q and the installation horizontal line L is the blade installation inclination. The distance between the front side of the blade body (1) and the center point O is r The distance between the tangent point of the arc surface tangent line of the wind guide surface (12) and the center point O is R, and the tangent point of the leeward surface (11) intersecting the radius circle is the point A. The straight line is L1, the straight line tangent to the leeward surface (11) at point A is L2, and the intersection angle between L1 and L2 is the static bending angle A1 of the back fan surface; the tangent of the wind guide surface (12) and the R radius circle The point is point B, the connecting line between the center point O and point B is L3, the straight line where the arc of the wind guide surface (12) at point B is tangent is L4, and the intersection angle between L3 and L4 is the positive fan surface static bending angle B1;

    At this time, the angle between the tangent line Q tangent to the front side and the rear side of the wind guide surface (12) and the installation horizontal line L is 8-15 °;

    When the value of r / R is 0.15, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9; the static bending angle A1 of the back fan surface is corresponding to -36.1 °, -20.2 °, -13.6 °, -10.8 °, -9.3 °, 0 °, 12.7 °, 23.1 °, 31.4 °; the static bending angle B1 of the positive sector is -24.1 °, -6.7 °, 8.6 °, 9.7 °, 4.2 °, -4 °, -12.8 °,- 21.5 °, -30.3 °.
17. A tail wing of a fan blade includes a tail wing body (2), the tail wing body (2) is composed of a wing portion (21) and a connecting portion (22), characterized in that the wing portion (21) is provided on the fan The wind leaf on one side of the blade body (1), the wing portion (21) is connected with the blade body (1) through a connecting portion (22) in a chamfered structure, and the cross-sectional shape and size of the connecting portion (22) are the same as the blade body (1) Correspondingly, the rear wing body (2) or the upper side of the connection part (22) is provided with a rear wing shut-off groove (23) corresponding to the blade shut-off groove (13) on the blade body (1), The cross-sectional shape and size of the tail wing cut-off groove (23) is the same as that of the blade cut-out groove (13).
18. The rear wing of a fan blade according to claim 17, characterized in that the rear wing body (2) is a hollow body, and the connecting portion (22) is provided on the side of the wing portion (21), and the connecting portion ( 22) The shape and size correspond to the shape and size of the cross section of the blade body (1), and a convex fixing piece (24) is provided on one side of the connecting portion (22), and the shape and size of the convex fixing piece (24) are The hollow mounting and fitting port (16) of the fan blade body (1) corresponds.
19. The tail fin of a fan blade according to claim 17, wherein the bottom of the wing (21) is thick and the tail is thin, and the inner side of the wing (21) is a slant.
20. A fan structure, including a rotating motor (31), a rotating body (32), a connecting rod (33), and a fan blade (34), characterized in that the fan blade (34) is any one of claims 1-16 In the novel blade, the size and shape of the connecting rod (33) correspond to the hollow shape of the cross section of the blade body (1), and the blade (34) is connected to the hollow position at one end of the blade body (1) The rod (33) is tightly fitted and fixed.
21. A fan structure according to claim 19, wherein the connecting rod (33) has a square structure, and the cross-sectional shape of the hollow body of the blade body (1) is square.
22. A fan structure according to claim 19, wherein one end of the fan blade (34) corresponds to the shape and size of the connecting side surface of the rotating body (32).
23. A fan structure according to claim 19, wherein the rotating body (32) is a rotating casing of a rotor on a rotating electric machine (31).
24. A fan structure according to claim 19, characterized in that the fan blade (34) further comprises the tail fin according to any one of claims 17-19.

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