CN211202196U

CN211202196U - Fan blade and wind power generation device

Info

Publication number: CN211202196U
Application number: CN201921827534.6U
Authority: CN
Inventors: 杨德岳
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-08-07
Anticipated expiration: 2029-10-28

Abstract

The utility model provides a flabellum and wind power generation set relates to the wind power generation field. The wind power generation device mainly comprises a support piece and fan blades. The support piece comprises a transmission shaft and a base, one end of the transmission shaft is connected with the support, and the other end of the transmission shaft is rotatably connected with the base. The fan blades drive the supporting piece to rotate relative to the base under the action of wind power, so that the aim of wind power generation is fulfilled. Due to the particularity of the fan blade structure, the utilization rate of wind power is greatly improved, and the power generation efficiency of the wind power generation device is greatly improved.

Description

Fan blade and wind power generation device

Technical Field

The utility model relates to a wind power generation field particularly, relates to a flabellum and wind power generation set.

Background

Wind power generation refers to converting kinetic energy of wind into electric energy. Wind energy is a clean and pollution-free renewable energy source and has long been used by people, for example, pumping water, grinding surfaces and the like through windmills. However, there is now interest in how to generate electricity from wind energy. Wind power generation equipment is equipment for generating power by utilizing wind power and is favored by countries all over the world, but the current wind power generation equipment still has some problems and needs to be improved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flabellum, it can improve the generating efficiency.

Another object of the utility model is to provide a power generation facility, its installation of being convenient for, wind energy utilization is higher.

The embodiment of the utility model is realized like this:

a fan blade includes a bracket and a first blade rotatably coupled. A plurality of first blades are arranged on the bracket at intervals.

In some embodiments of the present invention, the bracket includes a first fixing rod and a second fixing rod which are oppositely disposed. The first fixing rod, the fourth fixing rod, the second fixing rod and the third fixing rod are connected in sequence. Every first blade all disposes the dwang, and the both ends of dwang rotate with first dead lever, second dead lever respectively and are connected.

In some embodiments of the present invention, the rotating rod is provided with a first limiting rod, and the first fixing rod is provided with a second limiting rod. The first limiting rod and the second limiting rod are matched together to limit the rotating angle of the first blade.

In some embodiments of the present invention, the bracket further comprises a connecting arm. The connecting arm is detachably connected with the third fixing rod or the first fixing rod

In some embodiments of the present invention, a first reinforcing rib is further disposed between the third fixing rod and the connecting arm.

In some embodiments of the present invention, a wind power generation device includes a support member and any one of the fan blades. The support piece comprises a transmission shaft and a base, one end of the transmission shaft is connected with the support, and the other end of the transmission shaft is rotatably connected with the base.

In some embodiments of the present invention, the transmission shaft is sequentially sleeved with a first rotating portion, a rotation assisting portion and a second rotating portion. The rotation assisting part is connected with the transmission shaft in a transmission way, the first rotating part is provided with an air inlet, and the second rotating part is provided with an air outlet. The rotation assisting part comprises a plurality of second blades arranged at intervals, the second blades are circumferentially arranged around the transmission shaft, and one end of each second blade is connected with the transmission shaft. The air inlet, the gap between any two adjacent second blades and the air outlet are communicated in sequence.

In some embodiments of the present invention, the second rotating portion includes an arc-shaped curve at an edge thereof. The air outlet is arranged on the arc-shaped bend.

In some embodiments of the present invention, the first rotating portion and the second rotating portion are both rotatably connected to the rotation-assisting portion. The first rotating portion is further provided with a first windward portion, and the second rotating portion is further provided with a second windward portion.

In some embodiments of the present invention, the first rotating portion is further provided with a guide plate.

The embodiment of the utility model provides an at least, have following advantage or beneficial effect:

an embodiment of the utility model provides a fan blade, it is including rotating support and the first blade of connecting. The first blade is connected with the bracket in a rotating mode, so that the first blade can drive the bracket to rotate under the action of wind power. When the first blade is under the action of larger wind force, the first blade can rotate relative to the support, and when the first blade is driven to rotate under the action of wind force to generate electricity, part of kinetic energy generated by the first blade under the action of wind force can be converted into the rotation of the first blade relative to the support, so that the impact force borne by the support and the first blade is reduced, and the structural strength requirement required by the blade is reduced. The fan blades are stressed less in the running process, the structural strength requirement is lower, and the fan blades can be processed more simply. The fan blade can be manufactured and assembled on site, and does not need to be specially manufactured due to high strength requirement like the existing fan blade and can be installed and used after long-distance transportation. A plurality of first blades are arranged on the bracket at intervals. When being provided with a plurality of first blades on same support, when a plurality of first blades received wind power effect, the rotation of a plurality of first blades often is synchronous for the flabellum can obtain bigger area of receiving the wind, and the generating efficiency of flabellum is higher.

The embodiment of the utility model provides a still provide a wind power generation set, including support piece and above-mentioned arbitrary flabellum. The support piece comprises a transmission shaft and a base, one end of the transmission shaft is connected with the support, and the other end of the transmission shaft is rotatably connected with the base. The fan blades drive the supporting piece to rotate relative to the base under the action of wind power, so that the aim of wind power generation is fulfilled. Due to the particularity of the fan blade structure, the utilization rate of wind power is greatly improved, and the power generation efficiency of the wind power generation device is greatly improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a wind turbine generator according to embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a fan blade provided in embodiment 1 of the present invention;

FIG. 3 is a schematic view of the fan blade at position III in FIG. 1 in the direction B;

fig. 4 is a schematic structural view of a power assisting assembly on a transmission shaft according to embodiment 1 of the present invention;

fig. 5 is a schematic view of a transmission shaft and a second blade transmission connection provided in embodiment 1 of the present invention;

fig. 6 is a schematic structural view of a fan blade according to embodiment 2 of the present invention.

Icon: 100-a wind power plant; 110-fan blades; 111-a first blade; 1111-rotating rod; 1113-first stop lever; 1115-a second stop bar; 113-a scaffold; 1131 — first fixing bar; 1133-second fixing rod; 1135, a third fixing rod; 1137-a fourth fixing bar; 1139-linker arm; 130-a support; 1141-a first stiffener; 1143-a second reinforcing rib; 150-a drive shaft; 151-second rotating part; 1511-air outlet; 1513-arc bend; 1515-second windward part; 1517-wind direction regulator; 153-a rotation-assisting part; 1531 — a second blade; 155-a first rotating part; 1551-air inlet; 1553-first windward part; 1555-a flow guide plate; 170-a base; 300-fan blades.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience of description and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, "a plurality" means at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Example 1

Referring to fig. 1, fig. 1 is a schematic structural diagram of a wind turbine generator 100. The present embodiment provides a wind power generation apparatus 100, which mainly includes a support 130 and a plurality of blades 110 connected to the support 130. In this embodiment, the number of the fan blades 110 is 4, and four fan blades 110 may be circumferentially spaced and detachably mounted on the supporting member 130 by using a threaded connection, so that the fan blades 110 are mounted more easily and conveniently, and the stress on the supporting member 130 is more uniform. Of course, in other embodiments, the number of the fan blades 110 may also be adjusted reasonably, so that the wind power generating apparatus 100 can fully utilize wind energy to improve the generating efficiency thereof. The four blades 110 are driven by wind to convert wind energy into kinetic energy, and then the kinetic energy is transmitted to the power generation equipment through the supporting members 130, and the power generation equipment can convert the kinetic energy into electric energy.

Further, common power generation equipment and components used in cooperation with the wind power generation apparatus 100 are not shown in the drawings, and for example, a generator (other common equipment is not shown), may be installed at the bottom (ground) of the support member 130, and it is not necessary to install most of the common power generation equipment and components used in cooperation with the wind power generation equipment at a high altitude like the existing large wind power generation equipment, so that the upper equipment of the wind power generation apparatus 100 can be relatively simple, and installation and later maintenance of the wind power generation apparatus 100 are facilitated. The ground-mounted power generation common equipment has no great limit on the weight, not only can be provided with a multi-stage speed change device (the multi-stage speed change device can automatically adjust the stage number according to the wind power so as to improve the power generation efficiency of the wind power generation device 100), but also can use related standard equipment, and avoids the additional cost caused by the large use of special equipment.

Referring to fig. 1 and 2, fig. 2 is a schematic structural diagram of the fan blade 110. The present embodiment provides a fan blade 110, which mainly comprises a bracket 113 and a first blade 111 which are rotatably connected. The first blade 111 enables the fan blade 110 to drive the supporting member 130 to rotate under the action of wind power, so as to generate power. When the first blade 111 is subjected to a large wind force, the first blade 111 can rotate relative to the bracket 113, and when the fan blade 110 rotates to generate electricity, a part of kinetic energy generated by the first blade 111 under the wind force can be converted into the rotation of the first blade 111 relative to the bracket 113, so that the impact force borne by the bracket 113 and the first blade 111 is reduced, and the structural strength requirement required by the fan blade 110 is reduced. The stress of the fan blade 110 during operation is low, and the requirement on structural strength is low, so that the processing of the fan blade 110 can be simpler. The fan blades 110 can be manufactured and assembled on site, and need not be specially manufactured due to high strength requirement like the existing blades of large power generation equipment, and can be installed and used after long-distance transportation, thereby reducing unnecessary troubles.

Further, as shown in fig. 2, a plurality of first blades 111 may be disposed on the bracket 113 at intervals. The same support 113 may be provided with a plurality of first blades 111, so that the fan blades 110 may obtain a larger wind area, the power generation amount of the wind power generation apparatus 100 is larger, and the wind energy utilization rate is higher.

Referring to fig. 2, the bracket 113 may further include a first fixing bar 1131 and a second fixing bar 1133 disposed oppositely, and a third fixing bar 1135 and a fourth fixing bar 1137 disposed oppositely. As shown in fig. 2, the first fixing rod 1131, the fourth fixing rod 1137, the second fixing rod 1133 and the third fixing rod 1135 are sequentially connected to form a rectangular structure, so that the bracket 113 has excellent mechanical properties, can more firmly bear the first blade 111, and provides better conditions for the operation of the first blade 111. Of course, in other embodiments, the four fixing rods may be formed into other shapes as long as the above requirements are met.

As shown in fig. 2, each first blade 111 may be configured with a rotation rod 1111, and both ends of the rotation rod 1111 are rotatably connected to the first fixing rod 1131 and the second fixing rod 1133, respectively. Each of the first fixing rod 1131 and the second fixing rod 1133 may be provided with a through hole (not shown in the figure, the shape and size of the through hole match with the shape of the cross section of the rotation rod 1111) matching with the rotation rod 1111. Each first blade 111 can be installed on the bracket 113 through the rotating rod 1111, and each first blade 111 can rotate relative to the bracket 113, so as to reduce the impact force borne by the first blades 111 and the bracket 113 when being subjected to high wind force and reduce the possibility of damage to the fan blades 110.

Further, referring to fig. 1, fig. 2 and fig. 3, fig. 3 is a schematic structural view of the fan blade 110 at the position iii in fig. 1 in the direction B. In the position i of fig. 1 and the state shown in fig. 2 of the fan blade 110, the rotation of the first blade 111 is not yet limited; in the position iii of fig. 1 and the state shown in fig. 3, the fan blade 110 is already restricted from further rotation of the first blade 111. The rotating rod 1111 may further be provided with a first limiting rod 1113, and the first fixing rod 1131 may further be provided with a second limiting rod 1115, wherein the first limiting rod 1113 and the second limiting rod 1115 cooperate together to limit the rotation angle of the first blade 111. In this embodiment, each fan blade 110 has 3 first limiting rods 1113 and 3 second limiting rods 1115. The fan blades 110 can drive the supporting member 130 to rotate under the action of wind. Under the condition that the two limit rods exist, when the wind direction is the same as the direction in which the fan blade 110 drives the support member 130 to rotate, the first blade 111 always forms a larger contact area with the wind, so that the rotation speed of the fan blade 110 is increased; when the wind direction is opposite to the direction in which the fan blade 110 drives the supporting member 130 to rotate, the first blade 111 always forms a smaller contact area with the wind, so as to reduce the wind resistance received by the fan blade 110 during rotation, thereby ensuring the power generation efficiency of the wind power generation apparatus 100.

Further, the bracket 113 may further include an attachment arm 1139, and in this embodiment, the attachment arm 1139 is detachably connected to the third fixing rod 1135 (for example, by a threaded connection or the like). The connecting arm 1139 is detachably connected to the third fixing rod 1135 and the supporting member 130, so that the assembly of the fan blade 110 and the installation of the fan blade 110 on the supporting member 130 are both simpler and more convenient. After the connecting arm 1139 is detached from the fan blade 110, the size of the fan blade 110 is smaller, and the weight of the fan blade 110 is lighter, so that the transportation of the fan blade 110 is more convenient, and unnecessary troubles possibly generated during the transportation of the blades of the existing large power generation equipment are reduced. In other embodiments, the connecting arm 1139 can also be connected to the first fixing rod 1131, and the first blade 111 will be in a horizontal state (in this embodiment, in a vertical state).

Further, a first reinforcing rib 1141 may be further disposed between the third fixing bar 1135 and the connecting arm 1139. The first reinforcing ribs 1141 improve the strength of the fan blade 110 capable of bearing wind power, enhance the reliability of the fan blade 110, and on the other hand, reduce the requirement of material strength, thereby facilitating the realization of light weight design of the fan blade 110.

Further, as shown in fig. 1, a second reinforcing rib 1143 may be further disposed between any adjacent connecting arms 1139 (in this embodiment, the number of the connecting arms 1139 is 4). When the wind power generation apparatus 100 receives the wind force, the wind force can be uniformly transmitted to each connecting arm 1139. The four connecting arms 1139 can transmit wind power to the transmission shaft 150 together, so that the strength requirement of the connecting arms 1139 can be effectively reduced, the light-weight design of the connecting arms 1139 is facilitated, and the equipment cost can also be reduced. The second ribs 1143 are provided to further improve the mechanical properties of the wind turbine generator 100, thereby ensuring the reliability of the wind turbine generator 100.

Further, the size of the wind turbine generator 100 is variable, and the application is wide. When the wind power generation device 100 is large in size, the length of the connecting arm 1139 can be increased to enable the transmission shaft 150 to obtain sufficient torque to achieve breeze operation. The lightweight design of the link arm 1139 also provides for increased length.

Referring to fig. 1, the supporting member 130 may further include a transmission shaft 150 and a base 170. One end of the driving shaft 150 is connected to the bracket 113 (for example, a connection manner with a strong stability such as a threaded connection may be used to ensure the reliability of the connection between the fan blade 110 and the driving shaft 150). The fan blades 110 are mounted on the driving shaft 150 through the connecting arm 1139 disposed on the bracket 113, and the driving shaft 150 can provide support for the fan blades 110. The other end of the driving shaft 150 is rotatably connected to the base 170, the base 170 does not rotate, and the base 170 can provide a support for the driving shaft 150 and the fan blades 110 mounted on the driving shaft 150. The fan blades 110 can drive the transmission shaft 150 to rotate under the action of wind power, and the transmission shaft 150 can transmit kinetic energy generated by the fan blades 110 under the action of the wind power to power generation equipment (not shown in the figure) installed on the ground to generate power.

Referring to fig. 1 and 4, fig. 4 is a schematic structural view of the power assisting assembly on the transmission shaft 150 in the direction a in fig. 1. The power assisting assembly includes a first rotating portion 155, a rotation assisting portion 153, and a second rotating portion 151 (in a direction from bottom to top in fig. 1 and 4) sequentially fitted over the transmission shaft 150. Wind can enter the turning assisting portion 153 from the first turning portion 155 and be blown out from the second turning portion 151. The rotation assisting part 153 is in transmission connection with the transmission shaft 150, and the rotation assisting part 153 can accelerate the rotation speed of the transmission shaft 150.

The rotation-assisting section 153 increases the rotation speed of the transmission shaft 150, for example, by:

referring to fig. 1, 4 and 5, fig. 5 is a schematic view illustrating the driving connection between the driving shaft 150 and the second blade 1531. The first rotating part 155 may be provided with an air inlet 1551, the air inlet 1551 may be located at an upper side (not shown) of the first rotating part 155, the second rotating part 151 may be provided with an air outlet 1511, and a duct (not shown) through which an air flow passes may be formed between the air inlet 1551 and the air outlet 1511. As shown in fig. 5, the rotation-assisting part 153 may further include a plurality of second blades 1531 arranged at intervals, the plurality of second blades 1531 may be arranged circumferentially around the driving shaft 150, and one end of each second blade 1531 is in driving connection with the driving shaft 150. The air inlet 1551, the gap between any two adjacent second blades 1531 and the air outlet 1511 are sequentially communicated, so that air enters the rotation assisting portion 153 from the air inlet 1551 and flows through the second blades 1531, and then flows out from the air outlet 1511 smoothly. The second blade 1531 can generate a certain power to increase the rotation speed of the transmission shaft 150 under the action of wind power, so that the wind power generator 100 can more fully utilize the natural wind power, and further improve the power generation efficiency.

Further, as shown in fig. 4, the second rotating portion 151 may further include an arc-shaped bend 1513 (4) at an edge thereof, and the air outlet 1511 may be opened on the arc-shaped bend 1513. Wind flows out from the side surface of the second rotating portion 151 to form side wind, negative pressure can be generated on the air outlet 1511, the pressure difference between the air outlet 1511 and the air inlet 1551 is increased, the air flow rate inside the rotation assisting portion 153 is accelerated, and the rotation assisting effect of the rotation assisting portion 153 on the transmission shaft 150 is further improved.

Further, as shown in fig. 4, the peripheral curved bend 1513 can form a larger contact area with the wind than a planar structure. The second rotating portion 151 can rotate under the action of wind force more easily to adjust the angle of the air outlet 1511, so that resistance of natural wind force to airflow flowing out of the air outlet 1511 is avoided, the flow rate of air in the rotation assisting portion 153 is reduced, and the rotation assisting effect of the rotation assisting portion 153 on the transmission shaft 150 is reduced.

Further, referring to fig. 1 and 4, the first rotating portion 155 and the second rotating portion 151 are rotatably connected to the rotation-assisting portion 153. The first rotating portion 155 may be further provided with a first windward portion 1553 (2), and the second rotating portion 151 may be further provided with a second windward portion 1515 (as shown in fig. 4), and the second windward portion 1515 may be provided, for example, with reference to the structure of the curved bend 1513). The two rotating parts can rotate with the wind direction under the action of the windward parts, so that wind can smoothly enter and exit the air inlet 1551 and the air outlet 1511.

Further, in order to facilitate the second windward portion 1515 to drive the second rotating portion 151 to rotate under the action of wind force to adjust the angle of the air outlet 1511, the second windward portion 1515 may further be provided with a wind direction regulator 1517. The wind direction regulator 1517 may be provided, for example, with reference to the structure of the first windward portion 1553.

Further, referring to fig. 1, the first rotating part 155 may further include a baffle 1555. The guide plates 1555 can guide natural wind into the rotation assisting part 153 more intensively, and effectively increase the amount of wind entering the rotation assisting part 153. In order to make the guide plate 1555 guide the natural wind more effectively, the lower end of the guide plate 1555 is disposed close to the ground.

It should be noted that the shapes and structures of the first windward portion 1553, the second windward portion 1515 and the air deflector 1555 are not limited to the states shown in the drawings, and other structures may satisfy the corresponding requirements and achieve the same effect, for example, the air deflector 1555 may be formed by extending the air outlet 1511 downward and outward according to the shape of the bell mouth.

The operating principle of the wind turbine generator 100 is as follows:

the present embodiment provides a wind power generation apparatus 100, which mainly includes a support member 130 and a plurality of fan blades 110 connected to the support member 130, in the present embodiment, the number of the fan blades 110 is 4, and four fan blades 110 may be detachably mounted on the support member 130 at intervals in the circumferential direction, for example, in a threaded connection manner, so that the installation of the fan blades 110 is simpler and more convenient, and the stress of the support member 130 is more uniform. The four fan blades 110 can convert wind energy into kinetic energy when being acted by wind force, and then the kinetic energy is transmitted to the power generation equipment through the supporting piece 130, and the power generation equipment can convert the kinetic energy into electric energy, thereby completing wind power generation.

The fan blade 110 may further include a first blade 111, the first blade 111 is mounted on the first fixing rod 1131 or the third fixing rod 1135, the first limiting rod 1113 and the second limiting rod 1115 are respectively disposed on the fixing rod and the first blade 111, the first limiting rod 1113 and the second limiting rod 1115 are cooperatively used to limit the rotation angle of the first blade 111, so that the fan blade 110 can always form a larger contact area with the wind in downwind, thereby increasing the rotation speed of the fan blade 110, improving the power generation efficiency, and can always form a smaller contact area with the wind in upwind, thereby reducing the wind resistance received by the fan blade 110 in the rotation process, thereby further improving the power generation efficiency.

Example 2

Referring to fig. 6, fig. 6 is a schematic structural view of the fan blade 300. The present embodiment provides a fan blade 300, which mainly includes a bracket 113 and a first blade 111 (please refer to the related structure in embodiment 1 for other configurations). The bracket 113 may further include first and

second fixing bars

1131 and 1133 oppositely disposed, and third and

fourth fixing bars

1135 and 1137 oppositely disposed. As shown in fig. 2, the first fixing rod 1131, the fourth fixing rod 1137, the second fixing rod 1133 and the third fixing rod 1135 are sequentially connected, each of the first blades 111 may be configured with a rotation rod 1111, and two ends of the rotation rod 1111 are respectively rotatably connected to the third fixing rod 1135 and the fourth fixing rod 1137. The connecting arm 1139 of the fan blade 300 is detachably connected to the first fixing rod 1131 (for example, by a screw connection).

For example, the fan blade 300 may be made of a light alloy material, so that the weight of the fan blade 300 may be lighter, which is more favorable for realizing a light-weight design. Compared with the state that the first blades 111 are vertically arranged, when the fan blade 300 rotates under the action of wind, the centrifugal force applied along the axial direction of the fourth fixing rod 1137 is smaller, so that the fan blade 300 can have better stability at a higher rotation speed, and the fan blade 300 is more suitable for the wind power generation device 100 rotating at a high speed.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The fan blade is characterized by comprising a bracket and first blades which are rotatably connected, wherein the first blades are arranged on the bracket at intervals; the support includes relative first dead lever and the second dead lever that sets up, relative third dead lever and the fourth dead lever that sets up, first dead lever the fourth dead lever the second dead lever with the third dead lever connects gradually, every first blade all disposes the dwang, the both ends of dwang respectively with first dead lever the second dead lever rotates to be connected.

2. The fan blade according to claim 1, wherein the rotating rod is provided with a first limiting rod, the first fixing rod is provided with a second limiting rod, and the first limiting rod and the second limiting rod cooperate together to limit the rotation angle of the first blade.

3. The fan blade of claim 1, wherein said bracket further comprises a connecting arm, said connecting arm being detachably connected to said third fixing rod or said first fixing rod.

4. The fan blade of claim 3, wherein a first stiffener is further disposed between the connecting arm and the third fixing rod or the first fixing rod.

5. A wind power plant comprising a support and a blade according to any of claims 1 to 4, said support comprising a shaft and a base, said shaft being connected at one end to said support and at the other end to said base for pivotal connection.

6. The wind power generation device according to claim 5, wherein the transmission shaft is sequentially sleeved with a first rotating portion, a rotation assisting portion and a second rotating portion, the rotation assisting portion is in transmission connection with the transmission shaft, the first rotating portion is provided with an air inlet, the second rotating portion is provided with an air outlet, the rotation assisting portion comprises a plurality of second blades arranged at intervals, the second blades are arranged circumferentially around the transmission shaft, one end of each second blade is connected with the transmission shaft, and the air inlet, a gap between any two adjacent second blades and the air outlet are sequentially communicated.

7. The wind power generation device of claim 6, wherein the second rotating portion includes an arc-shaped curve at an edge thereof, and the outlet is opened at the arc-shaped curve.

8. The wind power generation device of claim 6, wherein the first rotating portion and the second rotating portion are both rotatably connected to the rotation-assist portion, the first rotating portion further being provided with a first windward portion, and the second rotating portion further being provided with a second windward portion.

9. Wind power unit according to any of claims 6-8, characterized in that the first turning part is further provided with a deflector.