CN203670280U - Fan blade and fan with fan blade - Google Patents

Abstract

The utility model discloses a fan blade and a fan with the fan blade. The fan blade comprises a hub and at least one blade body, the at least one blade body is arranged in the circumferential direction of the hub, a cross section parallel to the center axis of the hub is intersected with the suction surface and the pressure surface of each blade body to obtain a first intersecting line and a second intersecting line respectively, connecting lines of circle centers of circles tangent with the first intersecting lines and the second intersecting lines at the same time are profile mean line, the cross section is a plane or a cylindrical plane, and at least one half of at least one of the first intersecting lines, the second intersecting lines and the profile mean lines is configured to be a sine type curve. According to the fan blade, the blade bodies are designed through the sine type curves, the blade bodies with the good performance can be conveniently and rapidly obtained, the air volume and the energy efficiency of the fan blade are improved, and forward rotating air outgoing and backward rotating air outgoing of the fan blade can be achieved; in addition, the surfaces of the blade bodies are smooth, the continuity is good, high-frequency noise can be effectively suppressed, operating noise can be lowered, and therefore the overall performance of the fan blade can be improved.

Description

Fan vane and the fan with it

Technical field

The utility model relates to appliance field, especially relates to a kind of fan vane and has its fan.

Background technique

In correlation technique, the parameter that the blade of fan vane need to be considered in the time of design is more, and the uncertainty of design is very large, and the air quantity of fan vane is less, and performance is lower.

Model utility content

The utility model is intended at least solve one of technical problem existing in prior art.For this reason, an object of the present utility model is to propose a kind of fan vane, and the performance of described fan vane is good and design easy.

Another object of the present utility model is to propose a kind of fan with said fans fan blade.

According to the fan vane of the utility model first aspect, comprise: wheel hub and at least one blade, the week that described at least one, blade is located at described wheel hub upwards, wherein be parallel to the cross section of central axis and the suction surface of each described blade and crossing the first intersection and second intersection of obtaining respectively of pressure side of described wheel hub, with described the first intersection and described the second intersection simultaneously the line in the center of circle of tangent circle be profile mean line, described cross section is plane or cylndrical surface, wherein, described the first intersection, 1/2 section of at least one in described the second intersection and described profile mean line is constructed to sinusoidally curve.

According to fan vane of the present utility model, by adopting sinusoidally Curve Design blade, thereby can obtain easily the blade that performance is good, improve air quantity and the efficiency of fan vane, and can realize the clockwise and anticlockwise air-out of fan vane.In addition, the very fairing of the surface of this blade, continuity is good, can effectively suppress high-frequency noise, reduces running noise, thereby improves the overall performance of fan vane.

Alternatively, described cross section is the cylndrical surface coaxial with described wheel hub, the cylindrical coordinates parameter of the each point in the part that is configured to sinusoidally curve of at least one in described the first intersection, described the second intersection and described profile mean line (r, θ, z) meet following formula:

Wherein, r is cylindrical coordinates radius, and θ is angle, and z is height, R _xfor the distance between described cylndrical surface and the central axis of described wheel hub, a, ω, c, θ ₁, θ ₂for predetermined value.Thus, can heighten the design efficiency of fan vane.

Alternatively, described cross section is the cylndrical surface coaxial with described wheel hub, described cross section is eight, and the diameter in described eight cross sections increases successively, the part that is configured to sinusoidally curve of at least one in each described cross section described first intersection obtaining crossing with described blade, described the second intersection and described profile mean line meets following relation:

Wherein, R _xfor the distance between described cylndrical surface and the central axis of described wheel hub, R ₀for the radius of described wheel hub, b is wing chord length, and λ is aerofoil profile established angle, β ₁for how much angles of aerofoil profile import, β ₂for how much angles of aerofoil profile outlet, κ ₁for aerofoil profile leading edge direction angle, κ ₂for airfoil trailing edge direction angle.

Alternatively, described cross section is plane, and the right angled coordinates parameter (x, y, z) of the each point in the part that is configured to sinusoidally curve of at least one in described the first intersection, described the second intersection and described profile mean line meets following formula:

Wherein, S _xfor the distance between described plane and described central axis, a, ω, c, d ₁, d ₂for predetermined value.

Further, each described blade is configured to turn forward gradually from inside to outside.Thus, can heighten the design efficiency of fan vane.

Alternatively, described blade is that multiple and described multiple blades are evenly distributed on the periphery wall of described wheel hub.

Preferably, described blade is nine.

Alternatively, described blade is metalwork or working of plastics.

According to the fan of the utility model second aspect, comprise according to the fan vane of the above-mentioned first aspect of the utility model.

According to fan of the present utility model, by the fan vane of above-mentioned first aspect is set, thereby improve the overall performance of fan.

Additional aspect of the present utility model and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present utility model.

Brief description of the drawings

Fig. 1 is according to the plan view of the utility model embodiment's fan vane;

Fig. 2 is the rear view of the fan vane shown in Fig. 1;

Fig. 3 is the left view of the fan vane shown in Fig. 1;

Fig. 4 is the sectional drawing of the fan vane shown in Fig. 3;

Fig. 5 is the right elevation of the fan vane shown in Fig. 1;

Fig. 6 is the worm's eye view of the fan vane shown in Fig. 1;

Fig. 7 is the sectional drawing of the fan vane shown in Fig. 6;

Fig. 8 is the plan view of the fan vane shown in Fig. 1;

Fig. 9 is a stereogram of the fan vane shown in Fig. 1;

Figure 10 is a schematic diagram of the fan vane shown in Fig. 1;

Figure 11 is another schematic diagram of the fan vane shown in Fig. 1;

Figure 12 is another schematic diagram of the fan vane shown in Fig. 1;

Figure 13 is another schematic diagram of the fan vane shown in Fig. 1;

Figure 14-Figure 21 is the stereogram of the fan vane shown in Fig. 1 from different view.

Reference character:

100: fan vane;

1: wheel hub; 11: front; 12: the back side;

2: blade; 21: suction surface; 22: pressure side; 23: leading edge point; 24: trailing edge point;

25: profile mean line; 26: wing chord;

27: the tangent line of crossing leading edge point; 28: the tangent line of edge point later;

291: leaf slightly; 292: blade root;

3: cylndrical surface; 31: sinusoidally curve.

Embodiment

Describe embodiment of the present utility model below in detail, described embodiment's example is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment who is described with reference to the drawings, only for explaining the utility model, and can not be interpreted as restriction of the present utility model.

In description of the present utility model, it will be appreciated that, term " " center ", " longitudinally ", " front ", " afterwards ", " vertically ", " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of instructions such as " circumferentially " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of device or the element of instruction or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.

In addition, term " first ", " second " be only for describing object, and can not be interpreted as instruction or hint relative importance or the implicit quantity that indicates indicated technical characteristics.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the present utility model, except as otherwise noted, the implication of " multiple " is two or more.

In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be also electrical connection; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand the concrete meaning of above-mentioned term in the utility model.

Disclosing below provides many different embodiments or example to be used for realizing different structure of the present utility model.Of the present utility model open in order to simplify, hereinafter the parts to specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the utility model.In addition, the utility model can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and object clearly, itself do not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique that the utility model provides and the example of material, but those of ordinary skill in the art can recognize the property of can be applicable to of other techniques and/or the use of other materials.

In the utility model, unless otherwise clearly defined and limited, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, also can comprise that the first and second features are not directly contacts but by the other feature contact between them.And, First Characteristic Second Characteristic " on ", " top " and " above " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that First Characteristic level height is less than Second Characteristic.

Describe according to the utility model first aspect embodiment's fan vane 100 below with reference to Fig. 1-Figure 21.In the description of this specification, the performance of fan vane 100 mainly refers to air quantity, wind speed, efficiency and noise four indices.

With reference to Fig. 1-Fig. 9, according to the utility model first aspect embodiment's fan vane 100, comprising: wheel hub 1 and at least one blade 2, the week that wherein at least one blade 2 is located at wheel hub 1 upwards.Particularly, blade 2 is connected on the periphery wall of wheel hub 1, and blade 2 extends radially outwardly along wheel hub 1, like this, one end being connected with wheel hub 1 of blade 2 is defined as blade root 292, one end that it is contrary, be that one end away from wheel hub 1 of blade 2 is defined as leaf slightly 291, further, the end face towards user (the example front surface of wheel hub 1 as shown in Figure 1) of wheel hub 1 can be understood as the front 11 of wheel hub 1, its contrary one side is defined as the back side 12 of wheel hub 1 away from user's one side (the example rear surface of wheel hub 1 as shown in Figure 1), when fan vane 100 forwards (example as shown in Figure 1 fan vane 100 turns clockwise), the one side in the front 11 of the close wheel hub 1 of blade 2 is defined as pressure side 22, the one side at the back side 12 of the close wheel hub 1 of its contrary one side is defined as suction surface 21.Alternatively, blade 2 is metalwork or working of plastics.That is to say, blade 2 adopts metallic material or plastic materials to make.Certainly, the utility model is not limited to this, and blade 2 can also adopt other materials to make.In addition, what deserves to be explained is, the blade 2 of this fan vane 100 may be used on the electrical equipment such as fan, heating device or blower fan.

Further, as shown in Figure 10-Figure 13, be parallel to the cross section of central axis of wheel hub 1 and the suction surface 21 of each blade 2 and pressure side 22 crossing respectively the first intersection and the second intersection, with the line in the center of circle of the first intersection and the simultaneously tangent circle of the second intersection be profile mean line 25.

With reference to Figure 10, cross section can be plane or cylndrical surface, wherein, cross section is parallel with the central axis of wheel hub 1, cross section is more than or equal to the radius of wheel hub 1 to the distance of central axis, and be less than or equal to the radius (being the maximum distance between blade 2 and wheel hub 1 center) of fan vane 100, thereby cross section can be crossing with blade 2, particularly, intersection is surrendered respectively mutually with suction surface 21 and the pressure side 22 of blade 2 in cross section, here, the intersection of definition cross section and suction surface 21 is the first intersection, the intersection of cross section and pressure side 22 is the second intersection, on the length direction of the first intersection and the second intersection, the circle simultaneously tangent with the first intersection and the second intersection has numerous, the center of circle of this numerous circle is connected and obtains profile mean line 25 successively.

Particularly, 1/2 section of at least one in the first intersection, the second intersection and profile mean line 25 is constructed to sinusoidally curve 31.That is to say, only 1/at least two of the first intersection section is constructed to sinusoidally curve 31, or only 1/at least two of the second intersection section is constructed to sinusoidally curve 31, can also be to only have 1/2 section of profile mean line 25 to be constructed to sinusoidally curve 31, or at least two of the first intersection/mono-section, at least two of the second intersection/mono-section, any two in 1/2 section of three of profile mean line 25 are constructed to sinusoidally curve 31, again or 1/2 section of the first intersection, 1/2 section of at least two of the second intersection/mono-section and profile mean line 25 is constructed to respectively sinusoidally curve 31.

Preferably, whole piece the first intersection, whole piece the second intersection and whole piece profile mean line 25 are all constructed to sinusoidally curve 31, thereby can improve the air quantity of fan vane 100.Thus, conveniently control, adjust and revise the shape of blade 2, thereby can obtain easily the blade 2 of excellent performance, improved design efficiency.

Through experimental test comparison, air quantity and the efficiency value of the fan vane 100 that employing sinusoidally curve 31 designs are all larger.

Further, because adopting 31 matchings of sinusoidally curve, blade 2 forms, and sinusoidal line curve 31 has about central point or the symmetrical characteristic of part, therefore, can realize the clockwise and anticlockwise Bidirectional outlet air of fan vane 100, that is to say, for example, when fan vane 100 forwards (fan vane 100 in Fig. 1 turns clockwise), the front air-out of fan vane 100, for example, in the time that fan vane 100 reverses (fan vane 100 in Fig. 1 is rotated counterclockwise), the rear air-out of fan vane 100.

According to the utility model embodiment's fan vane 100, by at least one 1/2 section in the first intersection, the second intersection and profile mean line 25 is configured to sinusoidally curve 31, can easily and easily obtain the blade 2 that performance is good, thereby improve air quantity and the efficiency of fan vane 100, and can realize the clockwise and anticlockwise air-out of fan vane 100.In addition, due to the very fairing of surface of blade 2, continuity is good, thereby can effectively suppress high-frequency noise, reduces the running noise of fan vane 100, and then improves the overall performance of fan vane 100.

In an embodiment of the present utility model, with reference to Figure 12-Figure 15, cross section be the each point at least one the part that is configured to sinusoidally curve 31 in cylndrical surface 3, the first intersections, the second intersection and the profile mean line 25 coaxial with wheel hub 1 cylindrical coordinates parameter (r, θ, z) meet following formula:

Wherein, r is cylindrical coordinates radius, and θ is angle, and z is height, R _xfor the distance between cylndrical surface 3 and the central axis of wheel hub 1, a, ω,

c, θ ₁, θ ₂for predetermined value.

Particularly, the central axes of the central axis of cylndrical surface 3 and wheel hub 1, the radius of cylndrical surface 3 is R _x, the radius of wheel hub 1 is R ₀, the radius of fan vane 100 is R, wherein: R ₀≤ R _x≤ R, thus can construct multiple cylndrical surface 3 crossing with blade 2.While drawing blade 2, can be first taking the mid point at the back side 12 of wheel hub 1 as true origin, taking the medial axis of wheel hub 1 as Z axis, and the postive direction taking direction forward as Z axis, set up cylindrical coordinate, the wherein radius R x of the radius r corresponding circle cylinder 3 of cylindrical coordinates, the intersection of angle θ corresponding circle cylinder 3 and blade 2 the x-y of cylindrical coordinate plane inner projection across angular range, like this, according to the radius R of wheel hub 1 ₀can determine the roughly span of r with the radius R of fan vane 100, the then understanding of the shape to blade 2 according to the quantity of blade 2, width and those skilled in the art, determines the roughly span of θ, follow given constant a, ω,

the initial value of c (for example can be according to existing blade 2 shape with cylndrical surface 3 intersections, selects sinusoidally curve 31 equations that relatively approach, constant a, ω in this equation,

c can be used as the initial value of constant), thereby bring initial constant into sinusoidally curve 31 equations, the derivative equation that structure contains constant value, thereby obtain the curve that this equation is corresponding, and draw out this initial sinusoidally curve 31, then adopt this sinusoidally curve 31 to set up the model of blade 2, and by experiment or numerical experiment calculate, analyze the performance of this blade 2, then according to experimental result constantly revise a, ω,

the value of c, so repeat to obtain a sinusoidally curve 31 that makes blade 2 there is optimal performance, for another example this repeats said process to draw the sinusoidally curve 31 on different cylndrical surface 3, finally many sinusoidally curves 31 are fitted to curved surface, this curved surface can be suction surface 21, pressure side 22 or blade 2 surfaces of bone (curved surface fitting to by many profile mean lines 25) of blade 2.Here, it should be noted that, in the time of the parameter of design sinusoidally curve 31, conventionally the means of selecting l-G simulation test and bench run to combine, to obtain extremely excellent cylindrical coordinates parameter, thereby obtain the blade 2 of excellent performance, further can adopt the means of three-dimensional modeling to draw out optimum blade 2 and the fan vane 100 with this blade 2.Thus, can improve design efficiency.

The application in fan blade of the present utility model with a concrete example explanation sinusoidally curve 31 below.

Wherein, sinusoidally curve 31 equations have following feature:

Work as a=a ₁/ 2 o'clock, above formula can be converted into:

Particularly, the radius R of wheel hub 1 ₀for 62mm, the radius R of fan vane 100 is 198mm, describes as example below to get two cylndrical surface 3, and the radius of two cylndrical surface 3 is respectively 90mm and 130mm.

On the cylndrical surface 3 that is 90mm at radius, this cylndrical surface 3 meets following parametric equation (equation being derived by sinusoidally curve 31 equations) with the intersection of blade 2:

$\left\{\begin{array}{c}r=90\\ \mathrm{\θ}=2+43\·t,(0\≤t\≤1)\\ a_1=42\\ z=a_1\·(1+\sin (145\·t-80))/2+(38-a_1)/2+9\end{array}\right.$

On the cylndrical surface 3 that is 130mm at radius, this cylndrical surface 3 meets following parametric equation (equation being derived by sinusoidally curve 31 equations) with the intersection of blade 2:

$\left\{\begin{array}{c}r=130\\ \mathrm{\θ}=-1+42\·t,(0\≤t\≤1)\\ a_1=44\\ z=a_1\·(1+\sin (145\·t-80))/2+(38-a_1)/2+18\end{array}\right.$

So, also can set up the cylndrical surface 3 of other radiuses and sinusoidally curve 31 equations of the intersection of blade 2, thereby can simulate blade 2 by many sinusoidally curves 31 that obtain, thereby can obtain the fan vane 100 that performance is good.

In addition, it should be noted that, the curve on blade 2 meets the characteristic equation of cylindrical coordinates sinusoidally curve 31, and the equation curve being derived by this characteristic equation all drops in protection domain of the present utility model.

In an embodiment of the present utility model, cross section is the cylndrical surface 3 coaxial with wheel hub 1, cylndrical surface 3 is eight, and the diameter of eight cylndrical surface 3 increases successively, the part that is configured to sinusoidally curve 31 of at least one in each cross section first intersection obtaining crossing with blade 2, the second intersection and profile mean line 25 meets following relation:

Wherein, R _xfor the distance between cylndrical surface 3 and the central axis of wheel hub 1, R ₀for the radius of wheel hub 1, b is wing chord 26 length, and λ is aerofoil profile established angle, β ₁for how much angles of aerofoil profile import, β ₂for how much angles of aerofoil profile outlet, κ ₁for aerofoil profile leading edge direction angle, κ ₂for airfoil trailing edge direction angle.Like this, according to the satisfied parameters relationship of the intersection on each cross section, can draw out at least one in the first intersection, the second intersection and profile mean line 25, thereby can draw out blade 2.

Here, it should be noted that, the line of the two-end-point of profile mean line 25 is wing chord 26, the length of wing chord 26 is b, two end points of wing chord 26 are respectively leading edge point 23 and trailing edge point 24, leading edge point 23 is the end points that are positioned at the upstream of the flow direction of wind, the i.e. end points of a side windward, now trailing edge point 24 is the end points that are positioned at the downstream of the flow direction of wind, the rotational plane of wheel hub 1 is the first plane, the first plane is substantially vertical with the central axis of wheel hub 11, and the angle between wing chord 26 and the first plane is aerofoil profile established angle λ, how much angle β of aerofoil profile import ₁for the angle between tangent line and first plane of the profile mean line 25 by leading edge point 23, how much angle β of aerofoil profile outlet ₂for put the angle between tangent line and first plane of 24 profile mean line 25, aerofoil profile leading edge direction angle κ by trailing edge ₁for the angle between tangent line (example is crossed the tangent line 27 of leading edge as shown in Figure 10) and first plane of leading edge point 23 place's profile mean lines 25, airfoil trailing edge direction angle κ ₂for trailing edge is put the angle between tangent line (example as shown in Figure 10 later the tangent line 28 of edge) and first plane of 24 place's profile mean lines 25.

In an embodiment of the present utility model, cross section is plane, the right angled coordinates parameter (x, y, z) that 1/2 section of at least one in the first intersection, the second intersection and profile mean line 25 is configured to the each point in the part of sinusoidally curve 31 meets following formula:

Wherein, S _xfor the distance between plane and the central axis of wheel hub 1, a, ω,

c, d ₁, d ₂for predetermined value.

While drawing blade 2, can be first taking the center of wheel hub 1 as true origin, taking the back side 12 as the x-y planes of wheel hub 1, taking the mid point at the back side 12 of wheel hub 1 as true origin, set up z axle with the medial axis of wheel hub 1, wherein direction is forward the postive direction of z axle, the wherein distance between the corresponding cross section of coordinate x and wheel hub 1 center, the cross surface of the corresponding cross section of coordinate y and blade 2 the x-y of rectangular coordinate system plane inner projection across width range, like this, according to the radius R of wheel hub 1 ₀can determine the roughly span of x with the radius R of fan vane 100, and according to the span of definite variable y such as the width of actual blade 2, then given constant a, ω, the initial value of c (for example can be according to existing blade 2 shape with cylndrical surface 3 intersections, selects sinusoidally curve 31 equations that relatively approach, constant a, ω in this equation,

c can be used as the initial value of constant), thereby bring initial constant into sinusoidally curve 31 equations, the derivative equation that structure contains constant value, thereby obtain the curve that this equation is corresponding, and draw out this initial sinusoidally curve 31, then adopt this sinusoidally curve 31 to set up the model of blade 2, then calculate, analyze the performance of blade 2 by numerical experiment, and according to experimental result constantly revise a, ω,

the value of c, so repeat to obtain a sinusoidally curve 31 that makes blade 2 there is optimal performance, for another example this repeats the sinusoidally curve 31 of said process with the intersection that draws different cylndrical surface 3 and intercept, finally many sinusoidally curves 31 are fitted to curved surface, this curved surface can be suction surface 21, pressure side 22 or blade 2 surfaces of bone (curved surface fitting to by many profile mean lines 25) of blade 2.

In addition, it should be noted that, the curve on blade 2 meets the characteristic equation of right angled coordinates sinusoidally curve 31, and the equation curve being derived by this characteristic equation all drops in protection domain of the present utility model.

In an embodiment of the present utility model, each blade 2 is configured to turn forward gradually from inside to outside.That is to say, blade 2 slightly 291 extends to the front 11 of wheel hub 1 to leaf gradually from blade root 292.For example, in the time that the each point at least one the part that is configured to sinusoidally curve 31 in the first intersection, the second intersection and profile mean line 25 meets cylindrical coordinates parameter or right angled coordinates parameter, can realize blade 2 by adjustment parameter c turns forward from inside to outside gradually, that is to say, the c value of the sinusoidally curve 31 being cut the each cylndrical surface 3 outwards distributing from wheel hub 1 center increases gradually.Thus, can make the wind flowing out from fan vane 100 more converge to center, avoid wind to disperse along the radially outward of wheel hub 1, thereby increase the wind gathering effect of fan vane 100, make fan vane 100 air-out more even, air-out effect is better.In addition, fan vane 100 is in rotary course, and wind can produce active force to blade 2, make blade 2 produce slight distortion, by blade 2 is configured to turn forward gradually from inside to outside, can partial offset wind-force causes when running blade 2 be out of shape, to ensure the performance of fan vane 100.

Alternatively, blade 2 is evenly distributed on the periphery wall of wheel hub 1 for multiple and multiple blades 2.Preferably, blade 2 is nine, and nine blades 2 being circumferentially uniformly distributed along wheel hub 1.Further, nine blades 2, about the central axis Central Symmetry of wheel hub 1, that is to say, size, the shape of nine blades 2 are identical, and the aerofoil profile established angle λ of nine blades 2 is identical, and nine blades 2 are arranged on the periphery wall of wheel hub 1 equably.Thus, the overall performance of fan vane 100 can be improved, and the run stability of fan vane 100 can be ensured.Certainly, the utility model is not limited to this, and the quantity of blade 2 can also be according to actual requirement setting, to meet better actual requirement.

According to the utility model second aspect embodiment's fan (scheming not shown), comprise the fan vane 100 according to the above-mentioned first aspect embodiment of the utility model.

In one of them example of the present utility model, fan also comprises: base (scheming not shown), connecting rod (scheming not shown) and head (scheming not shown), wherein fan vane 100 is arranged in head, head is located at the upper end of connecting rod rotationally, the lower end of connecting rod is fixed on base, on base, be further provided with control unit, and control unit is electrically connected with head and fan vane 100 respectively, like this, user can be by operation control unit, the rotation of the rotation of regulating frame head and fan vane 100.

According to the utility model embodiment's fan, by above-mentioned first aspect embodiment's fan vane 100 is set, thereby improve the overall performance of fan.

In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And specific features, structure, material or the feature of description can be with suitable mode combination in any one or more embodiments or example.

Although illustrated and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present utility model and aim, can carry out multiple variation, amendment, replacement and modification to these embodiments, scope of the present utility model is limited by claim and equivalent thereof.

Claims (9)

1. a fan vane, is characterized in that, comprising:

Wheel hub; With

At least one blade, the week that described at least one, blade is located at described wheel hub upwards,

Wherein be parallel to the cross section of central axis and the suction surface of each described blade and crossing the first intersection and second intersection of obtaining respectively of pressure side of described wheel hub, with described the first intersection and described the second intersection simultaneously the line in the center of circle of tangent circle be profile mean line, described cross section is plane or cylndrical surface

Wherein, 1/2 section of at least one in described the first intersection, described the second intersection and described profile mean line is constructed to sinusoidally curve.

2. fan vane according to claim 1, it is characterized in that, described cross section is the cylndrical surface coaxial with described wheel hub, the cylindrical coordinates parameter of the each point in the part that is configured to sinusoidally curve of at least one in described the first intersection, described the second intersection and described profile mean line (r, θ, z) meet following formula:

Wherein, r is cylindrical coordinates radius, and θ is angle, and z is height, R _xfor the distance between described cylndrical surface and the central axis of described wheel hub, a, ω,

, c, θ ₁, θ ₂for predetermined value.

3. fan vane according to claim 1, it is characterized in that, described cross section is the cylndrical surface coaxial with described wheel hub, described cross section is that the diameter in eight and described eight cross sections increases successively, and the part that is configured to sinusoidally curve of at least one in each described cross section described first intersection obtaining crossing with described blade, described the second intersection and described profile mean line meets following relation:

Wherein, R _xfor the distance between described cylndrical surface and the central axis of described wheel hub, R ₀for the radius of described wheel hub, b is wing chord length, and λ is aerofoil profile established angle, β ₁for how much angles of aerofoil profile import, β ₂for how much angles of aerofoil profile outlet, κ ₁for aerofoil profile leading edge direction angle, κ ₂for airfoil trailing edge direction angle.

4. fan vane according to claim 1, it is characterized in that, described cross section is plane, right angled coordinates parameter (the x of the each point in the part that is configured to sinusoidally curve of at least one in described the first intersection, described the second intersection and described profile mean line, y, z) meet following formula:

Wherein, S _xfor the distance between described plane and described central axis, a, ω,

c, d ₁, d ₂for predetermined value.

5. according to the fan vane described in any one in claim 1-4, it is characterized in that, each described blade is configured to turn forward gradually from inside to outside.

6. fan vane according to claim 5, is characterized in that, described blade is that multiple and described multiple blades are evenly distributed on the periphery wall of described wheel hub.

7. fan vane according to claim 6, is characterized in that, described blade is nine.

8. fan vane according to claim 1, is characterized in that, described blade is metalwork or working of plastics.

9. a fan, is characterized in that, comprises the fan vane as described in any one in claim 1-8.

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