WO2020130556A1

WO2020130556A1 - Wind power generator blade

Info

Publication number: WO2020130556A1
Application number: PCT/KR2019/017845
Authority: WO
Inventors: 이도상; 이영민
Original assignee: 이도상; 이영민
Priority date: 2018-12-18
Filing date: 2019-12-17
Publication date: 2020-06-25
Also published as: KR101948064B1

Abstract

The present invention relates to a wind power generator blade and, more specifically, to a wind power generator blade having a frame-coupled body in which resistance frames and support frames, which have an edge frame shape with a space in the center, are coupled to have rectangular bent parts, wherein the plurality of resistance frames are radially fixed and coupled to a main driving shaft, which is a rotational center body, so that the inward directions of the bent parts have a single directivity, resistance plates are coupled to the inwardly bent corners of the bent parts so as to be axially rotatable by means of wind force so that the resistance plates block a wind path, which is the center space of the resistance frame, in the inward directions of the bent parts when the resistance frames are in the direction opposite to a wind direction, and thus the main driving shaft rotates with maximum resistance power, and wind passes through the center spaces of the resistance frames and/or the support frames by the rotational operation of the resistance plates, caused by the wind force, in a section in which the direction thereof is not opposite to the wind direction, so that drag is not generated, and thus the rotational direction of the main driving shaft, which is the rotational center body, does not change despite a change in the wind direction caused by the rotational operation of the resistance plates with respect to the resistance frames and the support frames.

Description

Wind turbine blades

The present invention relates to a blade for a wind power generator, and more specifically, the center portion is a frame frame combined with a resistance frame and a support frame having a right-angled bent frame in a central portion space, and the inner side of the bent portion is rotated to the main shaft of the rotating central chain. In order to have this one-way structure, a plurality of resistance frames are fixedly coupled in a radial direction, but the resistance plate is coupled to the inside of the bending part so that it can be rotated axially by wind, so that the resistance frame faces the wind direction in the inside direction of the bending part, and the resistance plate Block the wind path, the central space of the resistance frame, and rotate the main shaft with maximum resistance. In the section that does not face the wind direction, wind passes through the resistance frame and/or the central space of the support frame through rotation of the resistance plate by wind. It is configured so as not to generate a drag, and relates to a blade for a wind power generator that does not change the rotational direction of the main shaft, which is a rotational center, even when the wind direction changes due to the rotation operation of the resistance plate against the resistance frame and the support frame.

In general, horizontal axis wind turbines must withstand wind at right angles to the rotational direction of the blades, which leads to excessive manufacturing costs, such as high-quality steel and forging technology, to secure the blade blades. In addition, when strong winds over a certain level that the blade blades can withstand blow, the blade blades can be folded to stop the operation of the wind turbine, resulting in a situation in which wind energy cannot be utilized at the time when wind energy is most concentrated.

On the other hand, the wind power of the vertical axis receives the wind at a right angle to the blade wing surface, and can obtain a greater rotational force in comparison with the horizontal axis wind turbine at the same wind strength. However, the direction of rotation of the blade blades is in the direction of the wind direction and the forward direction of the blade, and the other direction is in the reverse direction of the wind direction.

A variable blade vertical axis wind turbine having a structure in which the angle of the blade for changing the above problems is changed according to the rotational direction and the wind direction is designed, and is proposed in Japanese Patent Application Publication No. JP 2005-9473 (Publication Date 2005.01.13). According to the above-mentioned publication, the blade receiving area is changed based on the angle changing axis of the blade surface, so that the blade forms a surface perpendicular to the wind blowing direction in the forward rotation section of the wind according to the wind and the rotating position of the blade. , In the reverse direction of the wind, it is a structure that forms a parallel surface.

In the conventional variable blade vertical axis wind turbine, the method of changing the blade angle basically changes the angle of the blade surface according to the difference in the area receiving the wind based on the variable axis of the blade surface. can see.

The first method, as in the Japanese Patent Application, has a force for changing the blade surface angle in a section in which the blade rotates in the reverse direction of the wind based on the vertical axis of the wind turbine and the blade surface angle in a section rotating in the forward direction of the wind. It is a method of linking forces for changing the second, and the second method is a method in which each blade is independently variable, and is configured independently without connecting the variable axes on both sides based on the vertical axis in the Japanese Patent Application.

The two methods have the following problems.

In the first method, the blade blade is always parallel to the wind direction in the section where the blade rotates in the reverse direction of the wind, and in the section where the blade is rotated in the forward direction of the wind, the blade wing is always close to the direction perpendicular to the wind direction. According to this, when the wind blows weakly after the wind blows strongly, the rotational speed of the blade in the forward section of the wind is higher than the speed of the wind, so it receives a strong air resistance on the blade surface, and the rotational force caused by the strong wind just before It results in losing. Therefore, considering the intermittent and irregular characteristics of the wind, this is a factor that greatly reduces the efficiency.

In the second method, when the blade speed is lower than the rotational speed of the blade in the forward section of the wind, the blade face changes to a plane close to the direction of the wind, but basically changes the angle of the blade face. In order to maintain the surface at an angle close to the direction of the wind, the blade surface has to receive a certain level of wind force or more, so it acts as a significant level of resistance to the rotation of the blade, and the efficiency of the wind turbine decreases as much. In addition, from the economical point of view, in order to withstand the force received by the blade blades in a section far from the central axis, it is uneconomical to construct the entire section of the blades with heavy steel that requires high level of technology and quality.

An object of the present invention is to provide a blade for a wind power generator that can select the most effective method in consideration of the above-mentioned conventional methods or the advantages and disadvantages of the prior art, but a more economical and simple concise structure and rich in technical diversity.

In addition, it is to provide a blade for a wind power generator that can rotate by maintaining the rotational direction of the main shaft connected to the wind turbine in one direction even when the wind direction changes.

In order to achieve the above object, the wind turbine blades of the present invention are fixedly coupled to a plurality of resistance frames having a wind path, which is an inner space in the form of a frame frame, radially fixed to a main shaft of a rotating center, and outside the resistance frame. A vertical frame combines a support frame with a spaced windbone at a certain angle in the form of a border frame to form a bent portion, and the shaft pins of the resistance plate are rotatable on the upper and lower shaft inserts formed in the bent corners of the bent portion. Insertion-combining, the opposite side of the wind direction, the resistance plate, which was axially rotated according to the fluid blur, is blocked from being rotated while completely blocking the wind path of the resistance frame in the inner direction of the bent portion, resulting in the maximum downward force against the wind force of the resistance plate. The main shaft is rotated, and on the other side, the resistance frame is configured to cancel the drag by blocking the resistance of the resistance plate through the wind path and the wind bone as the resistance plate contacts or approaches the support frame. And the rotational direction of the main shaft does not change according to the wind direction change according to the arrangement of the resistance plate with respect to the support frame.

In addition, the resistance frame is characterized in that the first flywheel is connected to each other with another resistance frame is provided on the resistance frame, the second flywheel is further provided to be connected to each other with the other support frame on the support frame.

In addition, the main shaft of the inner direction of the bent portion further comprises a plate fixing member that detects the resistance plate is in close contact with the resistance frame and prevents the rotation operation of the resistance plate so that the resistance plate and the resistance frame are kept in close contact. In order to prevent the rotation of the main shaft by forcibly adhering all the resistance plates sequentially to the resistance frame by the plate fixing member.

In addition, the upper end of the bent portion and the upper end of the support frame are respectively connected to the upper end of the main shaft and the supporting wire for weight support.

The wind turbine blades of the present invention through the configuration as described above is coupled to a central frame of the frame and the resistance frame in the form of a rectangular frame to have a bent portion at a right angle, radially fixed a plurality of resistance frames to the main shaft of the rotating central chain. In the section that is not reverse to the wind direction, the resistance plate rotates the main shaft with the maximum resistance by blocking the central space of the resistance frame in the wind direction and the reverse direction by combining the resistance plate axially with the wind power in the bending corner in the inside direction of the bend. It is configured to prevent wind from passing through the resistance frame and/or the center of the support frame through the rotational operation of the resistance plate by wind, so that the wind direction changes due to the rotational operation of the resistance plate against the resistance frame and support frame. It has the advantage that the rotational direction of the main shaft, which is the center of rotation connected to the wind turbine, does not change.

1 is a perspective view of a wind turbine blade according to the present invention.

2 is a view schematically showing the behavior of the resistance plate according to the wind direction.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Hereinafter, although wind power generation is described as an example, the present invention can be widely used in fields using wind power generation, hydro power generation, or other rotary blades.

The blade for the wind power generator of the present invention has a frame assembly (10) which is a combination of a resistance frame (11) and a support frame (13) coupled to have a bent portion (15) on the main shaft (20), which is a rotation center connected to a wind turbine. It is fixed in a plurality of radially coupled, and includes a resistance plate 18 that is axially rotated by wind power to the bending edge 16 of the inner direction (I) of the bending portion 15 is coupled.

The resistance frame 11 is formed in the form of a border frame in which the central portion is formed in a space, and the space in the central portion is a wind path 12 through which wind passes. Here, the shape of the edge of the resistance frame 11 may be variously formed, and is preferably formed as a square edge frame. Therefore, the entire space inside the rectangular border frame becomes the wind path 12.

The support frame 13 is also formed in the same way as the resistance frame 11. That is, the central portion is formed in the form of a border frame in the form of a space, and the space in the central portion is the wind bone 14 through which the wind passes. Here, the shape of the frame of the support frame 13 may be variously formed, and is preferably formed of a square frame. Therefore, the entire space inside the rectangular frame becomes the wind bone 14.

As shown above, one longitudinal frame of the support frame 13 is fixedly coupled to one longitudinal frame of the longitudinal frame of the resistance frame 11 in the form of a square frame, and fixed together with each other while forming the frame assembly 10 The vertical frame portion of one side of the combined resistance frame 11 and the support frame 13 becomes a bent portion 15. Here, the bent portion 15 is preferably formed at a right angle, and the shaft insert piece 17 is formed up and down in the inner edge (I) bent edge 16 of the bent portion 15. The shaft insert piece 17 formed in this way may be formed in various known forms, and is preferably formed protruding from the bending edge 16 in a circular or'C' shape.

As described above, preferably, the other longitudinal frame of the resistance frame 11 that does not form the bent portion 15 of the one frame assembly 10 fixedly coupled to form the right angled bent portion 15 is the main It is fixedly coupled to the coaxial (20). In this way, a plurality of the frame coupling bodies 10 fixedly coupled to the main shaft 20 are combined while maintaining the unidirectionality so that all the inner directions I of the bent portions 15 face the same direction.

The resistance plate 18 is integrally formed with a shaft-shaped shaft pin 18a at one end of the body plate 18b formed as a flat plate. Here, the size of the body plate 18b of the resistance plate 18 should be formed to exceed the size of the wind path 12 of the resistance frame 11 and the wind bone 14 of the support frame 13. This is the size that the shaft pin (18a) is axially rotatably inserted into the shaft insert piece (17) and then rotated by wind to be caught by the resistance frame (11) or support frame (13) to prevent rotation. . Therefore, the size of the body plate 18b preferably exceeds the size of the wind path 12 and the wind bone 14, but is formed below the overall size of the resistance frame 11 and the support frame 13.

In addition, a first flywheel 11a in the form of a ring connecting one resistance frame 11 and the other resistance frame 11 may be installed at upper and lower ends of the resistance frame 11. The first flywheel 11a compensates for a change in the resistance applied to the resistance plate 18 of the frame assembly 10 according to the wind strength, thereby helping a constant rotational speed of the main shaft 20 to be maintained. give. In order to perform the same function as the first flywheel 11a, a second flywheel 13a may be installed at the top and bottom of the support frame 13. Preferably, the first flywheel (11a) and the second flywheel (13a) are installed at the outermost ends of the resistance frame (11) and the support frame (13) so that the inertial force acts largely.

Further, on the main shaft 20 corresponding to the inner direction I of the bent portion 15, a plate fixing member 19 for bringing the resistance plate 18 into close contact with the resistance frame 11 is installed. Can. The plate fixing member 19 is operated by the control of a control unit (not shown), and is used when stopping rotation of the main shaft 20 for reasons such as inspection of a wind power generator. First, as shown in the frame assembly 10 installed on the left side of FIG. 2, a contact sensor (not shown) that senses that the resistance plate 18 is completely in close contact with the resistance frame 11 is installed on the main shaft 20. The signal is transmitted to the plate fixing member 19, and the stop pin 19a of the plate fixing member 19 protrudes according to the transmitted signal, thereby stopping the resistance plate 18 by the stop pin 19a and the resistance frame 11 It is locked in between to stop the rotation. The operation of the stop pin 19a of the plate fixing member 19 is sequentially repeated in another frame assembly 10 in which the resistance plate 18 is in close contact with the resistance frame 11 while the main shaft 20 is rotated. When the resistance plate 18 in all directions is in close contact with the resistance frame 11, the main shaft 20 stops rotating. This is because when the resistance plate 18 in the direction facing the wind direction is normally operated, the resistance plate 18 is in close contact with the resistance frame 11 by the wind to generate rotational force, and the resistance plate in the same direction as the wind direction ( This is because the rotational force caused by the wind is canceled while the 18 is also in close contact with the resistance frame 11 by the plate fixing member 19. When the resistance plates 18 in all directions are in close contact with the resistance frame 11 according to the operation of the plate fixing member 19, the resistance force of the resistance plates 18 that convert wind power into rotational force is applied to each resistance plate 18. It does not occur while offset by the main shaft 20 is to stop the rotation. When the rotation is stopped in this way, the repair of the wind power generator becomes easy.

In addition, the upper end of the bent portion 15 and the upper end of the support frame 13 may be connected to the upper end of the main shaft 20 and the support wire 30 for weight support, respectively. Here, of course, a tension adjusting means 31 is installed on the support wire 30.

The operation of the wind turbine blades of the present invention having the above configuration will be described.

2 is when the wind direction is directed from the bottom to the top. At this time, the resistance force of the resistance plate 18 is maximized from the left side that is perpendicular to the wind direction, and the maximum rotational force of the main shaft 20 is generated with the maximum resistance force.

However, in FIG. 2, a section in which the direction of the wind and the resistance plate 18 may come into contact with each other is theoretically left and right sides. However, the resistance force of the resistance plate 18 is maximized on the left side, and the resistance force of the resistance plate 18 is not generated on the right side.

This is a frame coupling body 10 is formed so that the resistance frame 11 and the support frame 13, which are the features of the present invention, have a right angle bending portion 15, and the inner direction of the bending portion 15 of the frame coupling body 10 is formed. A plurality of (I) is fixedly coupled to the main shaft 20 so as to have one-way directionality, the resistance plate 18 is rotatably installed in an inner direction (I) of the bent portion 15 in the bending edge 16 Is caused by. Due to this configuration, the range of rotational movement of the resistance plate 18 is limited to the inside of the right angled bent portion 15. This is a shaft insert piece 17 of the bending edge 16 is installed within the bending angle from the inside of the right angle bent portion 15, and the shaft pin 18a inserted and coupled to the shaft insert piece 17 is rotated as a rotation axis. Since the size of the body plate 18b of the working resistance plate 18 is larger than that of the wind path 12 and the wind valley 14, the resistance plate 18 that is rotated by wind has a resistance frame on the resistance frame 11 side. (11) The rotational motion is blocked, and on the support frame (13), the rotational motion is blocked by the support frame (13).

In other words, when the inner direction I of the right angled bent portion 15 of the frame assembly 10 is disposed to face (reverse) the wind direction, such as the frame assembly 10 disposed on the left side of FIG. 2, the shaft is driven by wind. As the body plate 18b rotates about the shaft pin 18a inserted into the insertion piece 17 and the entire resistance plate 18 moves away from the support frame 13, the resistance plate is pressed against the resistance frame 11 As the rotational motion of (18) is blocked, the maximum resistance to wind occurs. And this maximum resistance is transmitted to the main shaft 20 smoothly, the main shaft 20 rotates clockwise, and the wind turbine operates by the rotational movement of the main shaft 20.

Conversely, when the inner direction (I) of the right-angled bent portion 15 of the frame assembly 10 is disposed (backward) in the wind direction, as in the frame assembly 10 disposed on the right side of FIG. 2, the wind is applied to the resistance frame 11 ) While passing through the wind path 12, the resistance plate 18 is pushed out. Accordingly, the body plate 18b is rotated about the shaft pin 18a inserted into the shaft insert piece 17, so that the entire resistance plate 18 moves toward the support frame 13 and is in close contact with the support frame 13 As it becomes, the rotation operation of the resistance plate 18 is prevented. In this way, the resistance plate 18 is not generated in the resistance plate 18 in close contact with the support frame 13. Therefore, the main shaft 20 rotates clockwise with the maximum resistance against wind force applied to the resistance plate 18 of the left frame assembly 10.

In addition, the resistance plate 18 does not generate resistance against the wind even in the resistance plate 18 that rotates with respect to the frame assembly 10 at positions other than the left and right sides of FIG. 2.

For example, no drag is generated even in the resistance plate 18 of the frame assembly 10, which is dependent on the main shaft 20 rotating clockwise and moves from right to front (moving downward in FIG. 2). This is due to the feature of the present invention in which the inner direction (I) of the bent portion 15 of the frame assembly 10 moving from right to front reverses the wind direction. As the inner direction (I) of the bent portion 15 moves with the wind direction back and forth, the resistance plate 18 also receives the resistance frame 11 by wind passing through the wind bone 14 of the support frame 13. As the shaft rotates in the direction, the position is changed so that the same direction is always maintained with respect to the wind direction.

In addition, the frame assembly 10 moving from the front to the left in FIG. 2 is converted into a direction in which the inner direction I of the bent portion 15 faces the wind direction. Due to this, the resistance plate 18 is oriented to face the wind direction while the resistance plate 18 is axially rotated toward the resistance frame 11 by wind passing through the wind bone 14 of the support frame 13. The position is changed to generate drag.

In addition, when the frame assembly 10 rotates from left to back (moving upward in FIG. 2) of FIG. 2, wind is blocked by the resistance plate 18 of the frame assembly 10 located on the left side thereof. The resistance plate 18 rotates quickly from left to back in the figure in close contact with the resistance frame 11 because it is not transmitted over. Due to this, no drag is generated in the resistance plate 18 moving backward.

In addition, when the frame assembly 10 rotates from the rear to the right in FIG. 2, the resistance plate 18 is supported by the windshield passing through the wind path 12 of the resistance frame 11 ( 13) The position is changed to maintain the same directionality with respect to the wind direction while rotating in the direction. Due to this, no drag is generated in the resistance plate 18 moving from the rear to the right.

As described above, due to the radial arrangement on the main shaft 20 such that the inner direction I of the bent portion 15 has a certain directionality, the resistance frame 11 in the inner direction I of the bent portion 15 ) On the left side, which faces the wind direction, the resistance plate 18, which was axially rotated according to the fluid blur, winds the resistance frame 11 within the inner direction I of the bent portion 15. The rotation is stopped while completely blocking the 12, and the main shaft 20 is rotated with the maximum downward force against the wind power of the resistance plate 18, and the fluid is transferred to the wind path 12 and before and after the other side. By rotating the resistance plate 18 to face the same direction as the direction of the fluid while passing through the wind bone 14, the rotational direction of the main shaft 20 is changed despite the change in wind direction. It will not change.

In addition, in the present invention, on the resistance frame 11 and the support frame 13 corresponding to the inner direction I of the bent portion 15, the resistance plate 18 has a resistance frame 11 and a support frame ( 13) There is room for noise while contacting the phase. In order to prevent the noise generated in this way, a noise reduction member (not shown) may be further installed on the resistance frame 11 and the support frame 13 corresponding to the inner direction I of the frame assembly 10. The noise-reducing member may be provided with a sound absorbing material such as a sponge or synthrate, a shock absorber may be installed, or a hydraulic cylinder or an air cylinder may be installed. The noise reduction member as described above is installed on the resistance frame 11 and the support frame 13 corresponding to the inner direction (I) of the bent portion 15, the resistance plate 18 is a frame assembly 10 by wind power It reduces noise when it comes in contact with. For example, the sound absorbing material, such as the sponge or synthrate, intervenes between them and acts as a buffer to reduce noise. In addition, the shock absorber or the hydraulic cylinder to the air cylinder reduces the noise caused by the contact between the two by inducing very weak contact by rapidly reducing the movement speed at the last moment when the resistance plate 18 contacts the frame assembly 10. .

10: frame assembly 11: resistance frame

12: wind road 13: support frame

14: wind goal 15: bend

16: Bending edge 17: Shaft insert

18: resistance plate 18a: shaft pin

18b: body plate 19: plate fixing member

20: main shaft 30: support wire

I: Inward direction

Claims

The frame of the side of the resistance frame (11) having a wind path (12) as an inner space in the form of a square border frame and the support frame (13) having a wind frame (14) as an inner space in the shape of a square border frame Combined with each other to form a frame assembly 10 having a bent portion 15, the resistance frame 11 so that the inner direction (I) of the bent portion 15 of the frame assembly 10 has one-way The other side of the frame (고정) is fixedly coupled in a radial direction to the main shaft 20, which is a rotating center, and the upper and lower shaft inserts formed in the inner edge (I) of the bent portion (16) 16 17) the axial pin 18a of the resistance plate 18 is rotatably inserted and coupled,

On the side where the resistance frame 11 faces the wind direction in the inner direction I of the bent portion 15, the resistance plate 18, which was axially rotated in accordance with the fluid blur, of the bent portion 15 In the inner direction (I), the windshield 12 of the resistance frame 11 is completely blocked and rotated to rotate the main shaft 20 with the maximum low wind force, and the fluid from the other side is the windway ( 12) and while passing through the wind bone 14, the resistance plate 18 is rotated to be in the same direction as the fluid flow direction so that no drag is generated, and the direction of rotation of the main shaft 20 does not change even in a change in wind direction. Wing for wind turbines characterized in that it does not.
According to claim 1, The resistance frame 11 and the support frame 13, the bent portion (15) angle of the wind turbine blade, characterized in that the right angle.
According to claim 1, The resistance frame (11) is provided with a first flywheel (11a) that is connected to each other with the other resistance frame (11a) is provided on the support frame (13) is connected to each other with the other support frame (13) The second flywheel (13a) is a wind turbine blade characterized in that it is further provided.
According to claim 1, The main shaft 20 of the inner direction (I) of the bent portion (15) detects that the resistance plate (18) is in close contact with the resistance frame (11) and the resistance plate (18). The resistance frame 11 is further provided with a plate fixing member 19 that prevents the rotational movement of the resistance plate 18 so as to maintain a close contact with each resistance plate sequentially by the plate fixing member 19 ( 18) by forcibly contacting the resistance frame (11), the wind turbine blades, characterized in that to stop the rotation of the main shaft (20).
The wind power generation according to claim 1, wherein the upper end of the bent portion (15) and the upper end of the support frame (13) are respectively connected to the upper end of the main shaft (20) and the support wire (30) for weight support. Dragon wing.