A magnetic wind turbine blade for unloading pressure with predetermined wind force

Abstract

A magnetic wind turbine blade that relieves pressure with a predetermined wind force comprises a first window sash and a second window sash that are arranged opposite to each other and rotate around an axis respectively; a magnetic member that attracts each other is provided on the side opposite to the second window sash, and when the wind pressure is greater than the magnetic force of the magnetic member, the first window sash and the second window sash automatically open after getting rid of the magnetic force. The present invention can be opened with a predetermined wind force, and there will be no situation where the window sash is opened even though you do not want it to be opened. Only when the wind pressure is greater than the magnetic force of the magnetic member, each window sash automatically opens after getting rid of the magnetic force. In this way, each window sash automatically opens after getting rid of the magnetic force when the wind pressure is greater than the magnetic force of the magnetic member, and when encountering strong winds, the window sash automatically opens after getting rid of the magnetic force to relieve pressure, thereby ensuring the safety of the generator and the tower.

Description

Technical Field

[0001] The invention relates to a wind power generation blade, in particular to a magnetically attracted wind power blade which can relieve pressure with a predetermined wind force. Background Art

[0002] Existing wind turbine blades are usually made of materials such as fiberglass, and the blades are formed by mold processing. On the one hand, the manufacturing process and mold processing costs are high, and the blade shell needs to be designed as a curved surface, which is difficult to design. On the other hand, the fiberglass and other materials are heavy and cannot be designed to be larger. That is, the larger the volume of the blade, the heavier the fiberglass blade. In addition, existing wind turbine blades are all generated by high-power generators, which cannot be started in light wind conditions. In strong wind conditions, in order to prevent strong winds from blowing off the tower or blades, the generator will be forced to power off. Therefore, existing wind turbine blades can only generate electricity under moderate or strong winds.

[0003] In view of the above defects, the present invention has made a new improvement to the blades, designing the blade body into a window sash structure, which can be opened and closed adaptively by springs under the action of wind. When generating power in a breeze or moderate wind, the window sash is closed to achieve wind power generation, and when encountering strong winds, the window sash will automatically open to relieve pressure and ensure the safety of the generator and the tower. In this way, even in a strong wind state, the generator does not need to be forced to power off and stop generating power, and the generator can also be turned on in a breeze state. In this way, power generation can be achieved every hour throughout the year, greatly improving the power generation efficiency.

[0004] However, the inventor discovered during the design process that the window sash would sometimes open automatically in a breeze or moderate wind, resulting in reduced power generation efficiency, and could not be opened at a predetermined wind force as the inventor had envisioned. Sometimes, the window sash would open even though it was not intended, thus failing to achieve the ideal state. Therefore, the present invention urgently needs to design a wind turbine blade that can relieve pressure at a predetermined wind force. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and provide a magnetic wind turbine blade which is evenly stressed and can relieve pressure at a predetermined wind force.

[0006] The technical solution of the present invention is: a magnetic wind turbine blade that relieves pressure with a predetermined wind force, comprising a first window sash and a second window sash that are arranged relatively to each other and rotate around an axis respectively; a magnetic part that attracts each other is provided on the side opposite to the first window sash and the second window sash, and when the wind pressure is greater than the magnetic force of the magnetic part, the first window sash and the second window sash automatically open without being magnetically attracted.

[0007] The side of the magnetic members that attract each other is an arc-shaped surface.

[0008] The first window sash is provided with a magnetic attraction component, the second window sash is provided with a magnetic metal, and the magnetic metal is connected to the elastic component.

[0009] The magnetic attraction component comprises a first base body, the first base body has an arc-shaped surface on the side facing the magnetic metal, and the arc-shaped surface comprises upper and lower metal sheets and a magnetic sheet located between the upper and lower metal sheets.

[0010] The magnetic metal comprises a second seat body connected to the window sash, the main structure of the second seat body is a cavity structure formed by enclosing a plate body, and a magnetic metal sheet convex in an arc shape is provided on the side facing the magnetic attraction part.

[0011] A spring is arranged in the cavity of the second seat body, and the magnetic metal sheet can drive the spring to move. The magnetic metal sheet and the magnetic attraction piece are attracted to each other to compress the spring; under the action of wind force, the spring rebounds to push open the magnetic attraction piece.

[0012] The second seat cavity is provided with an axis connected to the magnetic metal sheet, and the spring is sleeved on the axis; the rear side of the axis is connected to a limiting plate, one end of the spring is connected to the limiting plate for limiting position, and the other end is connected to the magnetic metal sheet.

[0013] Each window sash comprises a window frame and a leaf plate arranged on the window frame. The window frame is connected by a horizontal hollow tube and a longitudinal hollow tube to form a grid structure, and the magnetic member is connected to the longitudinal hollow tube.

[0014] The wind turbine blade comprises a blade stem, a blade frame and a blade body; the blade frame comprises a plurality of transverse trusses connected at intervals along the blade stem, a plurality of window sashes are connected to the crossbars of each transverse truss, and all the window sashes form the blade body.

[0015] The window sash is adaptively opened and closed by controlling a tension spring or a torsion spring.

[0016] Beneficial effects of the present invention:

[0017] (1) The present invention can open the windows at a predetermined wind force by setting a magnetic part. There will be no situation where the windows are opened even though you do not want them to be opened. Only when the wind pressure is greater than the magnetic force of the magnetic part will the windows break away from the magnetic force and open automatically. In this way, when the wind pressure is greater than the magnetic force of the magnetic part, the windows break away from the magnetic force and open automatically. When strong winds occur, the windows break away from the magnetic force and open automatically to relieve pressure, thereby ensuring the safety of the generator and the tower.

[0018] (2) By designing the side of the magnetic component that generates magnetic force into an arc-shaped surface, it is possible to limit the position between adjacent window sashes and prevent the window sashes from being misaligned and attracted, thereby ensuring that the force on each window sash is uniform and the frame will not be subjected to huge torsion.

[0019] (3) By setting a spring on the magnetic part, the window sash can quickly get rid of the magnetic force and open automatically. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a window sash according to an embodiment of the present invention;

[0021] Figure 2 is an enlarged structural schematic diagram of a magnetic attraction member according to an embodiment of the present invention;

[0022] Figure 3 is an enlarged structural schematic diagram of a magnetic metal according to an embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the mutual attraction between the magnetic attraction component and the magnetic metal in an embodiment of the present invention;

[0024] Figure 5 It is a schematic diagram of the overall structure of a wind turbine blade according to an embodiment of the present invention.

[0025] Description of the accompanying drawings:

[0026] 1. First window sash; 2. Second window sash; 3. Leaf stem; 4. Leaf frame; 5. Leaf body; 6. Magnetic element; 7. Magnetic metal; 11. Window frame; 12. Leaf plate; 41. Horizontal truss; 61. First seat body; 62. Steel sheet; 63. Magnetic sheet; 71. Second seat body; 72. Cavity; 73. Magnetic metal sheet; 74. Shaft; 75. Spring; 76. Limiting plate; 111. Horizontal hollow tube; 112. Longitudinal hollow tube. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1~Figure 5 As shown: A wind turbine blade magnetic attraction structure for relieving pressure with a predetermined wind force, comprising a first window sash 1 and a second window sash 2 which are arranged opposite to each other and rotate around an axis respectively; a magnetic member which attracts each other is provided on the opposite side of the first window sash 1 and the second window sash 2, and when the wind pressure is greater than the magnetic force of the magnetic member, the first window sash and the second window sash automatically open after getting rid of the magnetic force.

[0029] Specifically, each window sash includes a window frame 11 and a leaf plate 12 arranged on the window frame. The window frame is a grid structure formed by welding a horizontal hollow tube 111 and a longitudinal hollow tube 112. For example, two longitudinal hollow tubes and two horizontal hollow tubes are welded to form an outer frame. The outer frame is welded by a longitudinal hollow tube and a plurality of horizontal hollow tubes to form a grid structure. The longitudinal hollow tubes in the outer frame are not arranged in the middle of the outer frame, but are arranged away from the middle to facilitate the eccentric rotation of the window sash. The reason why the window frame 11 of this embodiment adopts a hollow tube is, on the one hand, because the hollow tube is light in weight and saves materials; on the other hand, because the window sash of this embodiment is used on wind turbine blades and needs to be able to open and close under the action of wind, it requires a certain bending and torsional strength. This embodiment adopts a hollow tube, and more preferably a hollow tube with a circular cross section, in order to obtain the maximum strength with the least material and the lightest weight.

[0030] In this embodiment, the leaf plate 12 can be a flat plate or a corrugated plate. In this embodiment, the corrugated plate is preferred. Due to the bent structure, the strength can be greatly improved, thereby resisting the impact of strong winds. The leaf plate 12 can be connected to the window frame in an adaptive manner according to different materials. For example, metal materials can be welded, and non-metal materials can be glued.

[0031] In this embodiment, a wind turbine blade includes a blade stem 3, a blade frame 4 and a blade body 5. The blade stem 3 is a truss structure. The blade frame 4 includes a plurality of transverse trusses 41 spaced apart along the blade stem 3. At least two window sashes are connected to the crossbars of the transverse trusses. The intervals between adjacent transverse trusses can satisfy that a certain gap is provided between the window sashes connected thereto, so as not to hinder the rotation of the window sashes. A rotating shaft is provided on the eccentric longitudinal hollow tube of the window sash, a hinge seat is provided on the crossbar of the transverse truss, and the window sash is eccentrically rotatably connected to the crossbar of the transverse truss. Multiple window sashes are eccentrically connected to form the blade body 5.

[0032] The inventor found in the design that the window sash sometimes opens automatically in a breeze or a moderate wind state, resulting in a waste of resources. The window sash cannot be opened at the predetermined wind force as the inventor envisions. Sometimes, the window sash is opened even though the inventor does not want it to be opened, thus failing to achieve the ideal state. Therefore, the inventor thought of setting a magnetic piece on the window sash. When the wind pressure is greater than the magnetic force of the magnetic piece, each window sash will automatically open without getting rid of the magnetic force. If the predetermined wind force is not reached, the window sash will not open under the action of the magnetic force. In this way, the window sash can be closed in a breeze or a moderate wind state to achieve wind power generation. When encountering strong winds, the window sash will automatically open without getting rid of the magnetic force to relieve pressure, thereby ensuring the safety of the generator and the tower. It can be said that the blade structure of the present invention can achieve power generation regardless of whether it is a breeze or a strong wind, and in a strong wind state, only the window sash needs to be opened to continue to generate electricity, without the need to forcibly cut off the power supply of the generator to protect the blades as in the prior art. Therefore, the blades of the present invention can generate electricity all over the world without location restrictions, and the breeze can be used, and the strong wind automatically relieves pressure, so that 24-hour real-time power generation can be achieved.

[0033] The specific structure of the magnetic component in this embodiment is: the magnetic component is installed on the longitudinal hollow tube 112 of the window sash outer frame. In this embodiment, the magnetic component is preferably arranged on the upper, middle and lower parts of the longitudinal hollow tube 112. For example: three magnetic components 6 are arranged on the longitudinal hollow tube on one side of the outer frame of the first window sash 1, and three magnetic metals 7 are arranged on the longitudinal hollow tube on the other side. The second window sash 2 adjacent to the first window sash is also provided with corresponding magnetic components or magnetic metals at corresponding positions, which can ensure the generation of suction between adjacent window sashes. That is, a magnetic component is arranged on one side of the window frame of the window sash, and a magnetic metal is arranged on the other side, which attracts the magnetic metals or magnetic components on other adjacent window sashes.

[0034] like Figure 2 As shown: In this embodiment, the magnetic attraction member 6 includes a first seat body 61, and the side of the first seat body 61 connected to the longitudinal hollow tube 112 of the first window sash 1 is an arc-shaped surface, which is adapted to the shape of the longitudinal hollow tube and connected by welding. The first seat body 6 is also an arc-shaped surface on the side facing the magnetic metal, and the arc-shaped surface includes metal sheets arranged upper and lower, such as a steel sheet 62, and a magnetic sheet 63 is arranged between the upper and lower steel sheets 62, that is, the magnetic sheet 63 is located between the upper and lower steel sheets 62.

[0035] like Figure 3As shown: the magnetic metal 7 includes a second seat body 71, the side of the second seat body 71 connected to the longitudinal hollow tube of the second window sash 2 is also an arc-shaped surface, which is welded to the shape of the longitudinal hollow tube; the main structure of the second seat body 71 is a cavity 72 formed by the plate body, and a protruding magnetic metal sheet 73 is provided on the side facing the magnetic suction member 6. The magnetic metal sheet 73 is also arc-shaped, which can be inserted into the arc-shaped surface of the first seat body with the magnetic sheet and attract each other with the magnetic sheet. By designing the first seat body and the second seat body as arc-shaped surfaces on the side that generates suction, a limiting effect can be achieved, so that adjacent window sashes are just aligned and attracted, which is convenient for positioning between window sashes, and does not cause uneven phenomena such as one high and one low, thereby making each window sash evenly stressed.

[0036] Among them, the cavity of the second seat body 71 is also provided with an axis body 74 connected to the magnetic metal sheet 73, a spring 75 is sleeved on the axis body 74, the rear side of the axis body is connected to a limit plate 76, one end of the spring 75 is connected to the limit plate 76, and is limited by the limit plate, and the other end is connected to the magnetic metal sheet 73. When the magnetic metal sheet 73 is attracted by the magnetic sheet 63 of the first seat body, the spring 75 will be compressed under the drive of the magnetic metal sheet 73. When the wind force is greater than the magnetic force of the magnetic sheet 63, the window sash will be opened, and the spring will slowly rebound to loosen the first seat body. It can be said that by setting the spring, the window sash can be easily freed from the magnetic force and opened automatically.

[0037] In this embodiment, each window sash is also provided with a torsion or tension spring, which can enable the window sash to open and close adaptively. For example, a torsion spring is provided at the rotation node of the eccentric rotation of the window sash. When the wind force is greater than the torsion of the torsion spring and the magnetic force of the magnetic part, the window sash will be blown open; when the wind force is less than the torsion of the torsion spring, the window sash will automatically close under the action of the torsion spring, and after closing, the first seat body of the window sash and the second seat body of the other window sash are just attracted by the magnetic force and stuck in the curved surface, so that the window sash is evenly stressed. If the curved surface is not provided, huge torque will easily be formed.

[0038] To sum up, the present invention can open with a predetermined wind force by arranging a magnetic part, and there will be no situation where the window sash is opened when you do not want it to be opened. Only when the wind pressure is greater than the magnetic force of the magnetic part, each window sash will get rid of the magnetic force and open automatically. In this way, each window sash can get rid of the magnetic force and open automatically when the wind pressure is greater than the magnetic force of the magnetic part. When encountering strong winds, the window sash will get rid of the magnetic force and open automatically to relieve the pressure, thereby ensuring the safety of the generator and the tower; on the other hand, by designing the side of the magnetic part that generates magnetic force into an arc-shaped surface, it is possible to limit the adjacent window sashes to prevent the window sashes from being misaligned and attracted, thereby ensuring that the force on each window sash is uniform and the frame will not be subjected to huge torque; furthermore, by arranging a spring on the magnetic part, the window sash can be easily freed from the magnetic force and open automatically.

Claims

1. A magnetic wind turbine blade for decompression with a predetermined wind force, comprising a first window sash and a second window sash which are arranged opposite to each other and rotate around an axis respectively; characterized in that: The side of the first window sash opposite to the second window sash is provided with a magnetic part that attracts each other. When the wind pressure is greater than the magnetic force of the magnetic part, the first window sash and the second window sash automatically open after getting rid of the magnetic force; the first window sash is provided with a magnetic part, and the second window sash is provided with a magnetic metal; the magnetic part includes a first seat body, and the first seat body is an arc-shaped surface on the side facing the magnetic metal; the magnetic metal includes a second seat body connected to the window sash, and the second seat body is provided with a magnetic metal sheet that convexes into an arc shape on the side facing the magnetic part; the magnetic metal sheet can be stuck into the arc-shaped surface of the first seat body to play a limiting role, so that adjacent window sashes are just aligned and attracted to prevent misalignment between the window sashes.

2. The magnetic wind turbine blade for decompression by predetermined wind force according to claim 1, characterized in that: The magnetic metal is connected to the elastic member.

3. The magnetic wind turbine blade for decompression by a predetermined wind force according to claim 1, characterized in that: The arc-shaped surface includes upper and lower metal sheets and a magnetic sheet located between the upper and lower metal sheets.

4. The magnetic wind turbine blade for decompression by a predetermined wind force according to claim 1, characterized in that: The main structure of the second seat body is a cavity structure formed by enclosing a plate body.

5. The magnetic wind turbine blade for decompression by a predetermined wind force according to claim 4, characterized in that: A spring is arranged in the cavity of the second seat body, and the magnetic metal sheet can drive the spring to move. The magnetic metal sheet and the magnetic attraction piece are attracted to each other to compress the spring; under the action of wind force, the spring rebounds to push open the magnetic attraction piece.

6. The magnetic wind turbine blade for decompression by a predetermined wind force according to claim 5, characterized in that: The second seat cavity is provided with an axis connected to the magnetic metal sheet, and the spring is sleeved on the axis; the rear side of the axis is connected to a limiting plate, one end of the spring is connected to the limiting plate for limiting position, and the other end is connected to the magnetic metal sheet.

7. The magnetic wind turbine blade for decompression by a predetermined wind force according to claim 1, characterized in that: Each window sash comprises a window frame and a leaf plate arranged on the window frame. The window frame is connected by a horizontal hollow tube and a longitudinal hollow tube to form a grid structure, and the magnetic member is connected to the longitudinal hollow tube.

8. The magnetic wind turbine blade for decompression by a predetermined wind force according to claim 7, characterized in that: The wind turbine blade comprises a blade stem, a blade frame and a blade body; the blade frame comprises a plurality of transverse trusses connected at intervals along the blade stem, a plurality of window sashes are connected to the crossbars of each transverse truss, and all the window sashes form the blade body.

9. The magnetic wind turbine blade for decompression by a predetermined wind force according to claim 7, characterized in that: The window sash is adaptively opened and closed by controlling a tension spring or a torsion spring.

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