阅读说明：本技术 一种高转速风力发电机桨叶 (High-rotating-speed wind driven generator blade ) 是由 薛冻 于 2020-07-03 设计创作，主要内容包括：本发明公开了一种高转速风力发电机桨叶,其包括用于与发电机涡轮轮毂连接的流线型旋翼；所述旋翼的迎风面上横向设有至少一个用于加速旋翼迎风面空气流动的加速槽,所述加速槽设置在旋翼靠近出风侧的一端,所述加速槽的长度为与其所在位置旋翼宽度的1/5至4/5。加速槽减少了风由桨叶柄桨叶尖端的流量,使更多的风能够进入加速槽,并在加速槽内加速后喷出,并推动涡轮旋转,使作用在涡轮上的转矩得到增加,从而提高了涡轮的转速,增加发电量,提高了发电效率,并可降低风力发电机运行的最低风速,即风速低于传统涡轮正常工作要求的最低风速时,增加加速槽的风力发电机也可正常运行和发电。(The invention discloses a high-rotating-speed wind driven generator blade, which comprises a streamline rotor wing connected with a turbine hub of a generator; at least one accelerating groove used for accelerating the air flow on the windward side of the rotor wing is transversely arranged on the windward side of the rotor wing, the accelerating groove is arranged at one end, close to the air outlet side, of the rotor wing, and the length of the accelerating groove is 1/5-4/5 of the width of the rotor wing at the position of the accelerating groove. The accelerating groove reduces the flow of wind from the tip of the blade handle blade, so that more wind energy can enter the accelerating groove, is sprayed out after accelerating in the accelerating groove, pushes the turbine to rotate, increases the torque acting on the turbine, improves the rotating speed of the turbine, increases the generating capacity, improves the generating efficiency, and can reduce the lowest wind speed of the wind driven generator, namely when the wind speed is lower than the lowest wind speed required by the normal work of the traditional turbine, the wind driven generator additionally provided with the accelerating groove can also normally operate and generate electricity.)

1. A high speed wind turbine blade, characterized in that it comprises a streamlined rotor (2) for connection to a generator turbine hub (4); transversely be equipped with at least one on the windward side of rotor (2) and be used for accelerating acceleration groove (3) of rotor (2) windward side air flow, acceleration groove (3) set up in rotor (2) and are close to the one end of air-out side, the length of accelerating groove (3) is 1/5 to 4/5 of rotor (2) width of its position.

2. A high rotational speed wind turbine blade according to claim 1, wherein the cross-sectional area of the acceleration groove (3) is gradually decreasing in the direction of the flow of the wind.

3. A high speed wind turbine blade according to claim 1, wherein the rotor (2) has at least two flaps (5) fixedly connected to the rotor along the length direction thereof, and a V-shaped acceleration slot (3) is formed between adjacent flaps (5), the acceleration slot (3) has a wide air inlet side and a narrow air outlet side, and the acceleration slot (3) is disposed above the windward side of the rotor (2).

4. A high speed wind turbine blade according to claim 1, wherein the length of the acceleration slot (3) is 1/4 to 1/2 of the width of the rotor (2).

5. A high speed wind turbine blade according to claim 1, wherein the acceleration slot (3) is located below the windward side of the rotor (2).

6. A high rotational speed wind turbine blade according to claim 1, wherein the cross section of the acceleration groove (3) is rectangular or trapezoidal, and the two adjacent surfaces of the acceleration groove (3) are rounded.

Technical Field

The invention relates to the field of wind power generation equipment, in particular to a high-rotating-speed wind driven generator blade.

Background

The coordinated development of economy, energy and environment is a necessary condition for achieving the national modernization goal. With the global warming and the continuous consumption of fossil energy and the problem of the influence on the environment, the development of other energy sources is more and more emphasized. In the emerging energy types, wind energy is one of the conversion forms of solar energy, is an inexhaustible clean renewable energy, does not generate any harmful gas and fertilizer, does not pollute the environment, and has huge development potential and broad prospect.

The current wind driven generator adopts a power generation mode that wind power drives a turbine to rotate so as to drive a generator to generate power. The rotor of the turbine blade used at present is a propeller type rotor with a smooth surface, and the cross-sectional area of the rotor is gradually reduced from the center of the turbine to the outside. When wind blows to the windward side, airflow acts on the surface of the rotor wing and is then decomposed into thrust along the axial direction of the generator and thrust along the tangential direction of the rotor wing, and only the part of the tangential thrust can push the turbine to rotate so as to generate electricity. However, because the surface of the rotor wing is smooth, due to the characteristics of the propeller type rotor wing, a part of wind flows from the center of the turbine to the tip direction of the outer side of the rotor wing along the windward side of the rotor wing, and the part of wind captured by the rotor wing cannot push the turbine to rotate and is wasted, so that the working efficiency of the turbine can be influenced. Meanwhile, when the wind speed is lower than the minimum wind speed required by the operation of the traditional wind driven generator, the wind driven generator cannot work normally.

In order to reduce the air quantity flowing from the center of the turbine to the tip direction of the rotor wing along the longitudinal direction of the rotor wing along the windward side of the rotor wing, a transverse through groove can be added on the rotor wing, so that one part of the wind flowing along the longitudinal direction of the rotor wing enters the through groove to push the rotor wing to rotate, the torque applied on the rotor wing is increased, the rotating speed of the wind driven generator is improved, and the efficiency of the wind driven generator is also improved.

There are many factors that affect the speed and efficiency of a wind turbine, such as wind speed, turbine size, wing profile and angle of attack, rotor surface texture, etc.

It is generally believed that, after the acceleration slot is added on the windward side of the rotor, the longer the acceleration slot on the rotor is, the more the air volume enters into the acceleration slot, the greater the pushing force on the turbine is, so that in use, the acceleration slot is set to be a through slot, so that more air enters into the slot. However, in practice, although resistance is added to the wind flowing along the longitudinal direction of the rotor, and a part of the wind enters the grooves to generate thrust to the rotor, the effect is not obvious, the improvement of the rotating speed and the generating efficiency of the wind driven generator with the accelerating grooves is not obvious, the improvement of the rotating speed and the efficiency of the wind driven generator is limited, and the increasing amount of the rotating speed is generally not more than 5%.

Disclosure of Invention

The invention aims to provide a high-rotating-speed wind driven generator blade which is used for improving the rotating speed and the efficiency of a wind driven generator.

In order to solve the problems, the technical scheme adopted by the invention is as follows:

a high speed wind turbine blade comprising a streamlined rotor for connection to a generator turbine hub; at least one accelerating groove used for accelerating the air flow on the windward side of the rotor wing is transversely arranged on the windward side of the rotor wing, the accelerating groove is arranged at one end, close to the air outlet side, of the rotor wing, and the length of the accelerating groove is 1/5-4/5 of the width of the rotor wing at the position of the accelerating groove.

Further, the cross-sectional area of the acceleration groove is gradually reduced along the flow direction of the wind.

Further, the rotor is equipped with two at least ailerons rather than fixed connection along its length direction, is the acceleration groove of V-arrangement between the adjacent aileron, the air inlet side width in groove with higher speed, it is narrow to go out the air-out side, the groove sets up more than the windward side of rotor with higher speed.

Further, the length of the acceleration groove is 1/4-1/2 of the width of the rotor.

Further, the acceleration groove is located below the windward side of the rotor.

Furthermore, the cross section of the accelerating groove is rectangular or trapezoidal, and round corner transition is formed between two adjacent surfaces of the accelerating groove.

The invention has the positive effects that:

according to the invention, the accelerating grooves are arranged on the surface of the blade of the traditional wind driven generator, so that the flow of wind along the longitudinal direction of the rotor wing is reduced, more wind energy can enter the accelerating grooves, is sprayed out after being accelerated in the accelerating grooves, and pushes the turbine to rotate, so that the torque acting on the turbine is increased, the rotating speed of the turbine is increased, the generating capacity is increased, the generating efficiency is improved, and the lowest wind speed of the wind driven generator in operation can be reduced, namely when the wind speed is lower than the lowest wind speed required by the normal operation of the traditional turbine, the wind driven generator with the added accelerating grooves can also be normally operated and generate electricity. The invention can also be used for improving the existing wind driven generator blade, and the rotating speed and the working efficiency of the wind driven generator blade are improved. The groove air inlet side the place ahead is the air inlet district with higher speed, and the wind in air inlet district can not flow out from the rotor front end and produce adverse effect to the turbine is rotatory.

Drawings

FIG. 1 is a schematic view of the structure of a turbine according to embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a rotor according to embodiment 1 of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a schematic structural view of a rotor according to embodiment 2 of the present invention;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is a cross-sectional view taken at the location C-C in FIG. 4;

FIG. 7 is a schematic view of the flow of wind over the rotor when the acceleration slot is a through slot;

in the figure, 1, ailerons; 2. a rotor; 3. an acceleration tank; 4. a hub.

Detailed Description

Through increasing logical groove on the rotor of generator in the wind to promote aerogenerator's rotational speed and efficiency, thereby can send more electric energy. However, the phenomenon of a small wind turbine in actual operation is different from the above-mentioned general knowledge.

This aerogenerator reforms transform through pasting horizontal aileron at the windward side, and every aileron comprises the paster that a plurality of sections pasted on the rotor, forms the acceleration groove of V-arrangement between the aileron, and the groove length equals with rotor width with higher speed. After the wind driven generator operates for several months, the rotating speed of the wind driven generator is suddenly increased during operation, the generated power is increased, but the electric appliances are not changed. After that, some patches on the air inlet side of the acceleration slot on the rotor wing are inherently fallen off due to infirm adhesion.

The analysis shows that the rotor with the through groove as the acceleration groove enables a part of wind to flow out from the front end of the acceleration groove after entering the acceleration groove, so that the wind can not push the turbine to rotate, and even can generate opposite torque to the turbine to block the rotation of the turbine. After the patches fall off, an air inlet area is formed in front of the groove, and most of air in the air inlet area enters the accelerating groove to push the turbine to rotate. The above reasoning was confirmed by subsequent partial removal of the turbine patch of the wind turbine and finite element simulation tests performed by a computer.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.