Air leakage blade and vertical windmill

Abstract

The present application provides a leaky blade and a vertical windmill, belonging to the field of wind power generation. The leaky blade includes a blade body and a windshield. The blade body is provided with a first window. The windshield is disposed corresponding to the first window and is configured to: when the wind force acting on the windshield is not greater than a threshold, the windshield closes the first window; when the wind force acting on the windshield exceeds the threshold, the windshield opens the first window in the direction of the airflow. The leaky blade protects the wind turbine blades when the wind force is too strong, thereby ensuring normal power generation by the windmill.

Description

Technical Field

[0001] The present application relates to the field of wind power generation, and in particular to a leaky blade and a vertical windmill. Background Art

[0002] In the prior art, when the wind force is too strong and exceeds the maximum wind force that the wind turbine blades can withstand, it is easy to cause the wind turbine blades to be damaged, thereby causing the wind turbine to be unable to generate electricity normally. Summary of the Invention

[0003] The purpose of this application is to provide a leaky blade and a vertical windmill, which can protect the wind turbine blades when the wind force is too strong, thereby ensuring normal power generation of the windmill.

[0004] The embodiment of the present application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a wind-leaking blade, comprising a blade body and a windshield. The blade body is provided with a first window; the windshield is provided corresponding to the first window, and the windshield is configured to meet the following requirements:

[0006] When the wind force applied to the wind shield is not higher than a threshold value, the wind shield can close the first window; when the wind force applied to the wind shield is higher than the threshold value, the wind shield can open the first window along the direction of the airflow.

[0007] In the above technical solution, a first window is opened on the blade body, and a windshield corresponding to the first window is provided. Through the cooperation of the first window and the windshield, when the wind force is too strong, part of the wind can pass through the first window, thereby reducing the force on the blade body, thereby playing a role in protecting the blade body; wherein, the windshield is configured to be able to open the first window along the direction of the airflow, that is, the windshield can open the first window when facing wind in different directions. Compared with the form in which the first window can only be opened in one direction, the windshield has stronger compatibility.

[0008] In some optional embodiments, the blade body is provided with a plurality of first windows, and each of the plurality of first windows is provided with a corresponding wind shield.

[0009] In the above technical solution, multiple first windows and corresponding wind shields are provided, which can allow more wind to pass through the multiple first windows when the wind is too strong, thereby reducing the force on the blade body more quickly and effectively, and thus better protecting the blade body.

[0010] In some optional embodiments, the windshield includes a first windshield and a second windshield. The first windshield is disposed corresponding to the first window and is configured to: when the wind force applied to the first windshield is not higher than a threshold, the first windshield abuts against the blade body to close the first window; when the wind force applied to the first windshield is higher than the threshold, the first windshield moves away from the blade body in the direction of the airflow to open the first window;

[0011] The first wind shield is provided with a second window, and the second wind shield is arranged corresponding to the second window. The second wind shield is configured to meet the following requirements: when the wind force received by the second wind shield is not higher than a threshold value, the second wind shield abuts against the first wind shield to close the second window; when the wind force received by the second wind shield is higher than the threshold value, the second wind shield moves away from the blade body along the direction of the airflow to open the second window.

[0012] In some optional embodiments, the windshield member includes a third windshield located in the first window, and one side of the third windshield is hingedly connected to a side edge of the first window via a connecting rod. The third windshield is configured to meet the following requirements:

[0013] When the wind force received by the third wind shield is not higher than a threshold value, the outer wall of the third wind shield fits against the inner wall of the first window to close the first window; when the wind force received by the third wind shield is higher than a threshold value, the third wind shield can deflect around the connecting rod to open the first window.

[0014] In the above technical solution, the windshield can be set in the form of two windshields cooperating with each other, or in the form of only one windshield, so that the setting form of the windshield is relatively rich, and more feasible implementation plans can be provided, thereby facilitating promotion and application. Among them, the first window is opened or closed by only one windshield, which has the advantage of a relatively simple structure.

[0015] In some optional embodiments, the first windshield is connected to the blade body via an elastic member, the elastic member has an elastic restoring force that drives the first windshield close to the blade body, and the elastic member is configured to meet the following requirements:

[0016] When the wind force applied to the first windshield is not higher than a threshold value, the elastic restoring force is greater than the wind force, and the first windshield abuts against the blade body; when the wind force applied to the first windshield is higher than the threshold value, the elastic restoring force is less than the wind force, and the first windshield moves away from the blade body;

[0017] Optionally, a plurality of elastic members are provided and are distributed at intervals along the circumference of the first window.

[0018] In the above technical solution, the opening or closing of the first window is achieved by providing an elastic member. Compared with other control forms, this solution has the advantages of a simpler structure of the control mechanism and greater controllability.

[0019] Furthermore, a plurality of elastic members are provided, and the plurality of elastic members are arranged to be distributed at intervals along the circumference of the first window, so that the connection between the wind shield and the blade body can be more stable, thereby improving the stability of the overall structure of the air leakage blade.

[0020] In some optional embodiments, the elastic member includes a fixed rod, a first limit block, an elastic support member, a second limit block and a third limit block; the first limit block, the second limit block and the third limit block are sequentially spaced on the fixed rod along the axial direction of the fixed rod, and the first limit block and the third limit block are both fixedly connected to the fixed rod, the second limit block is slidably connected to the fixed rod, the elastic support member is arranged between the first limit block and the second limit block, the elastic support member has a driving force to drive the second limit block to approach the third limit block, the first wind deflector and the blade body are both sleeved on the fixed rod and located between the second limit block and the third limit block, and the elastic support member is configured to meet the following requirements:

[0021] When the wind force applied to the first windshield is not higher than a threshold, the driving force of the elastic support member is greater than the wind force; when the wind force applied to the first windshield is higher than the threshold, the driving force of the elastic support member is less than the wind force.

[0022] In the above technical solution, the elastic member is arranged in the above form, which can make the structure of the elastic support member itself relatively firm and stable. At the same time, this arrangement enables the wind shield and the blade body to be both sleeved on the fixed rod, and when the wind shield and the blade body are in contact, the two can be well supported and fixed together by the second and third limit blocks, thereby further enhancing the connection stability between the wind shield and the blade body.

[0023] In some optional embodiments, a bidirectional torsion spring is provided on the outer periphery of the connecting rod, both ends of the bidirectional torsion spring are connected to an end of the third windshield plate close to the connecting rod, and the bidirectional torsion spring is configured to meet the following requirements:

[0024] When the wind force applied to the third windshield is not higher than a threshold, the first window is closed; when the wind force applied to the third windshield is higher than a threshold, the bidirectional torsion spring is deformed to open the first window.

[0025] Optionally, a plurality of bidirectional torsion springs are provided and are distributed at intervals along the axial direction of the connecting rod.

[0026] In some optional embodiments, an elastic limiting component is provided on the outer sleeve of the connecting rod, an end of the elastic limiting component close to the third wind deflector is connected to the third deflector, and an end of the elastic limiting component away from the third wind deflector is connected to the blade body, and the elastic limiting component is configured to meet the following requirements:

[0027] When the wind force applied to the third windshield is not higher than a threshold value, the first window is closed; when the wind force applied to the third windshield is higher than the threshold value, the elastic limiting component is deformed to open the first window;

[0028] Optionally, a plurality of elastic limiting assemblies are provided and are distributed at intervals along the axial direction of the connecting rod.

[0029] In the above technical solution, the forms of hinge connection achieved by connecting rods are relatively rich, which can provide more feasible implementation plans, thereby facilitating promotion and application.

[0030] Furthermore, a plurality of bidirectional torsion springs and elastic limiting assemblies are provided and are distributed at intervals along the axial direction of the connecting rod, which can make the connection between the third wind deflector and the blade body more stable and more controllable.

[0031] In some optional embodiments, the thickness of the end of the third wind deflector close to the connecting rod corresponds to the thickness of the connecting rod.

[0032] In the above technical solution, the third windshield is arranged in the above form, so that the size of the part of the third windshield used to connect the bidirectional torsion spring is relatively close to the radial size of the bidirectional torsion spring, thereby facilitating the connection of the bidirectional torsion spring to the third windshield.

[0033] In some optional embodiments, the elastic limiting assembly includes a connecting member and an elastic limiting piece, the elastic limiting piece is connected to the blade body, the elastic limiting piece includes two arc-shaped limiting portions that are relatively distributed and away from each other, and the two arc-shaped limiting portions are surrounded to form a limiting cavity, the connecting member is sleeved on the periphery of the connecting rod, the side of the connecting member close to the third wind shield is connected to the third wind shield, and the side of the connecting member away from the third wind shield is provided with a protrusion corresponding to the limiting cavity, so that the connecting member can be engaged with the elastic limiting piece, and the elastic limiting piece is configured to meet the following requirements:

[0034] When the wind force received by the third windshield is not higher than a threshold, the first window is closed;

[0035] When the wind force applied to the third wind shield is higher than a threshold value, the elastic limiting piece is deformed to open the first window.

[0036] In the above technical solution, the elastic limiting component is arranged in the above form, which can enable the side of the connecting member close to the elastic limiting piece to achieve an arc transition with the elastic limiting piece, thereby making the third windshield more stable when deflected by wind.

[0037] In some optional embodiments, a limiting groove is provided on one side of the connecting member close to the third wind shield, and the limiting groove is used to snap-fit ​​with one end of the third wind shield close to the connecting member, and along the thickness direction of the third wind shield, the connecting member is provided with a pin hole that passes through the connecting member and is connected to the limiting groove, and the third wind shield is provided with a corresponding through hole so that the third wind shield and the connecting member can be pinned together.

[0038] In the above technical solution, the side of the third wind shield close to the connecting piece is set to be snap-fitted with the connecting piece. Furthermore, the corresponding parts of the third wind shield and the connecting piece are set to be latch-fitted. The third wind shield and the connecting piece are connected together through both snap-fitting and latch-fitting, which can make the connection between the two extremely firm and stable.

[0039] In a second aspect, an embodiment of the present application provides a vertical windmill comprising a main shaft and a plurality of leakage blades as provided in the embodiment of the first aspect. The plurality of leakage blades are connected to the main shaft, each leakage blade being configured to revolve around the main shaft and each leakage blade being configured to rotate about its rotation axis.

[0040] In the above technical solution, the vertical windmill includes the leaky blades provided in the first embodiment. When wind speeds are high, the first window and the windshield cooperate to protect the main blade body, thereby ensuring normal power generation by the windmill. Furthermore, the leaky blades are configured to both revolve around the main axis and rotate around their own rotational axis. This improves the rotational efficiency of the windmill blades, thereby improving the power generation efficiency of the windmill, compared to windmill blades that can only revolve around the main axis.

[0041] In some optional embodiments, the rotation axis is located in the middle of the blade body, and the plurality of first windows are symmetrically arranged about the rotation axis;

[0042] Optionally, the plurality of first windows located on the same side of the rotating shaft are distributed side by side along the axial direction of the rotating shaft.

[0043] In the above technical solution, the rotating shaft is set in the middle of the blade body, and at the same time, multiple first windows are set to be symmetrical about the rotating shaft, which can make the overall structure of the blade body more symmetrical, so that the force on the blade body is more balanced when it is affected by wind, thereby improving the stability of the blade body when it is affected by wind.

[0044] Furthermore, by arranging the multiple first windows located on the same side of the rotating shaft to be distributed side by side along the axial direction of the rotating shaft, the overall structure of the blade body can be made more symmetrical, thereby further improving the stability of the blade body when exposed to wind. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0046] Figure 1 A schematic structural diagram of an air leakage blade provided with a first window provided in an embodiment of the present application;

[0047] Figure 2 A schematic structural diagram of an air leakage blade provided with an air shield provided in an embodiment of the present application;

[0048] Figure 3 A schematic diagram of a connection of a double-layer windshield provided in the embodiment of the present application;

[0049] Figure 4 Schematic cross-sectional view of the first window when the windshield provided by the embodiment of the present application is provided with a double-layer windshield plate and closed and opened from different directions;

[0050] Figure 5 for Figure 3 A local enlarged view of point I in FIG;

[0051] Figure 6 A schematic structural diagram of another air leakage blade provided with an air shield provided in an embodiment of the present application;

[0052] Figure 7 Schematic cross-sectional views of the first window when the windshield provided by the embodiment of the present application is provided with a single-layer windshield plate and closed and opened from different directions;

[0053] Figure 8 for Figure 6 A local enlarged view of point I in FIG;

[0054] Figure 9 A schematic structural diagram of a bidirectional torsion spring provided in an embodiment of the present application;

[0055] Figure 10 A schematic structural diagram of another air leakage blade provided with an air shield provided in an embodiment of the present application;

[0056] Figure 11 for Figure 10 A local enlarged view of point I in FIG;

[0057] Figure 12 A schematic structural diagram of a connector provided in an embodiment of the present application;

[0058] Figure 13A schematic structural diagram of an elastic limiting piece provided in an embodiment of the present application;

[0059] Figure 14 A schematic structural diagram of a vertical windmill provided in an embodiment of the present application.

[0060] Icons: 10-leakage blade; 100-blade body; 110-first window; 120-rotating shaft; 200-wind shield; 210-first wind shield; 211-second window; 220-second wind shield; 230-elastic member; 231-fixing rod; 232-first limit block; 233-elastic support member; 234-second limit block; 235-third limit block; 240-third wind shield; 250-connecting rod; 260-bidirectional torsion spring; 270-elastic limit assembly; 271-connecting member; 2711-limiting groove; 2712-pin hole; 272-elastic limit plate; 2721-arc-shaped limit part; 1-vertical windmill; 20-main shaft. DETAILED DESCRIPTION

[0061] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0062] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0063] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0064] In the description of this application, it should be noted that the terms "upper," "lower," "inner," and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0065] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0066] See Figure 1 and Figure 2 In a first aspect, an embodiment of the present application provides a wind-leaking blade 10, comprising a blade body 100 and a windshield 200. The blade body 100 is provided with a first window 110; the windshield 200 is disposed corresponding to the first window 110, and is configured to meet the following requirements:

[0067] When the wind force received by the wind shield 200 is not higher than the threshold, the wind shield 200 can close the first window 110; when the wind force received by the wind shield 200 is higher than the threshold, the wind shield 200 can open the first window 110 along the direction of the airflow.

[0068] In the present application, a first window 110 is opened on the blade body 100, and a windshield 200 corresponding to the first window 110 is provided. Through the cooperation of the first window 110 and the windshield 200, when the wind force is too strong, part of the wind can pass through the first window 110, thereby reducing the force on the blade body 100, thereby playing a role in protecting the blade body 100; wherein, the windshield 200 is configured to be able to open the first window 110 along the direction of the airflow, that is, the windshield 200 can open the first window 110 when facing wind in different directions. Compared with the form in which the first window 110 can only be opened in one direction, the windshield 200 has stronger compatibility.

[0069] It should be noted that “the windshield 200 can open the first window 110 along the direction of the airflow” actually refers to two-way air leakage, see Figure 4 and Figure 7 It can be seen that when the wind direction is from right to left, the wind shield 200 opens the first window 110 from the left side, and when the wind direction is from right to left, the wind shield 200 opens the first window 110 from the right side.

[0070] As an example, the blade body 100 is provided with a plurality of first windows 110 , and each of the plurality of first windows 110 is provided with a corresponding wind shield 200 .

[0071] In this embodiment, multiple first windows 110 and corresponding wind shields 200 are provided, which can allow more wind to pass through the multiple first windows 110 when the wind is too strong, thereby reducing the force on the blade body 100 more quickly and effectively, and thus better protecting the blade body 100.

[0072] It should be noted that the number of the first windows 110 is not limited and can be adjusted according to actual needs.

[0073] It should be noted that the form of the wind shield 200 is not limited, as long as it can realize the opening or closing of the first window 110 .

[0074] Figure 3 and Figure 4 As an example, the wind shield 200 includes a first wind shield plate 210 and a second wind shield plate 220 . The first wind shield 210 is provided corresponding to the first window 110, and the first wind shield 210 is configured to meet the following requirements: when the wind force applied to the first wind shield 210 is not higher than a threshold value, the first wind shield 210 abuts against the blade body 100 to close the first window 110; when the wind force applied to the first wind shield 210 is higher than the threshold value, the first wind shield 210 moves away from the blade body 100 in the direction of the airflow to open the first window 110; the first wind shield 210 is provided with a second window 211, and the second wind shield 220 is provided corresponding to the second window 211, and the second wind shield 220 is configured to meet the following requirements: when the wind force applied to the second wind shield 220 is not higher than a threshold value, the second wind shield 220 abuts against the first wind shield 210 to close the second window 211; when the wind force applied to the second wind shield 220 is higher than the threshold value, the second wind shield 220 moves away from the blade body 100 in the direction of the airflow to open the second window 211.

[0075] It should be noted that Figure 4 The arrows in the figure represent wind directions, and from left to right they represent cross-sectional schematic diagrams of the first window 110 being closed and opened from different directions.

[0076] See Figure 6 and Figure 7 As an example, the windshield 200 includes a third windshield 240. The third windshield 240 is located in the first window 110, and one side of the third windshield 240 is hingedly connected to a side edge of the first window 110 via a connecting rod 250. The third windshield 240 is configured to meet the following requirements:

[0077] When the wind force received by the third wind deflector 240 is not higher than a threshold value, the outer wall of the third wind deflector 240 fits against the inner wall of the first window 110 to close the first window 110; when the wind force received by the third wind deflector 240 is higher than a threshold value, the third wind deflector 240 can deflect around the connecting rod 250 to open the first window 110.

[0078] It should be noted that Figure 7 The arrows in the figure represent wind directions, and from left to right they represent cross-sectional schematic diagrams of the first window 110 being closed and opened from different directions.

[0079] In this embodiment, the windshield member 200 can be set in the form of two windshields cooperating with each other, or can be set in the form of only one windshield, so that the setting form of the windshield member 200 is relatively rich, and more feasible implementation plans can be provided, thereby facilitating promotion and application. Among them, the opening or closing of the first window 110 is realized by only one windshield, which has the advantage of a relatively simple structure.

[0080] See Figure 3 As an example, the first windshield 210 is connected to the blade body 100 via an elastic member 230. The elastic member 230 has an elastic restoring force that drives the first windshield 210 to approach the blade body 100, and the elastic member 230 is configured to meet the following requirements:

[0081] When the wind force applied to the first wind shield 210 is not higher than a threshold value, the elastic restoring force is greater than the wind force, and the first wind shield 210 abuts against the blade body 100; when the wind force applied to the first wind shield 210 is higher than the threshold value, the elastic restoring force is less than the wind force, and the first wind shield 210 moves away from the blade body 100;

[0082] Optionally, a plurality of elastic members 230 are provided and are distributed at intervals along the circumference of the first window 110 .

[0083] In this embodiment, the opening or closing of the first window 110 is achieved by providing an elastic member 230 , which has advantages such as a simpler structure of the control mechanism and stronger controllability compared to other control forms.

[0084] Furthermore, a plurality of elastic members 230 are provided, and the plurality of elastic members 230 are arranged to be distributed at intervals along the circumference of the first window 110 , so that the connection between the wind shield and the blade body 100 can be more stable, thereby improving the stability of the overall structure of the air leakage blade 10 .

[0085] It should be noted that the connection and cooperation between the second wind shield 220 and the first wind shield 210 also adopts the above-mentioned setting form to realize the opening or closing of the second window 211.

[0086] See Figure 5As an example, the elastic member 230 includes a fixing rod 231, a first limiting block 232, an elastic support member 233, a second limiting block 234 and a third limiting block 235; the first limiting block 232, the second limiting block 234 and the third limiting block 235 are sequentially spaced along the axial direction of the fixing rod 231 on the fixing rod 231, and the first limiting block 232 and the third limiting block 235 are both fixedly connected to the fixing rod 231, and the second limiting block 234 is slidably connected to the fixing rod 231, the elastic support member 233 is arranged between the first limiting block 232 and the second limiting block 234, and the elastic support member 233 has a driving force to drive the second limiting block 234 to approach the third limiting block 235. The first wind deflector 210 and the blade body 100 are both sleeved on the fixing rod 231 and located between the second limiting block 234 and the third limiting block 235, and the elastic support member 233 is configured to meet the following requirements:

[0087] When the wind force applied to the first wind shield 210 is not higher than a threshold, the driving force of the elastic support 233 is greater than the wind force; when the wind force applied to the first wind shield 210 is higher than a threshold, the driving force of the elastic support 233 is less than the wind force.

[0088] It should be noted that the length of the fixing rod 231 is not limited and can be adjusted according to the actual wind strength. For example, when the wind is strong and a greater air leakage is required, a longer fixing rod 231 can be used to increase the distance between the wind shield 200 and the first window 110, thereby increasing the air leakage. When the wind is weak and a smaller air leakage is required, a shorter fixing rod 231 can be used to decrease the distance between the wind shield 200 and the first window 110, thereby reducing the air leakage.

[0089] It should be noted that, since the third limiting block 235 in the elastic member 230 is blocked by the windshield, its connection relationship with the windshield can refer to the third limiting block 235 adjacent thereto.

[0090] In this embodiment, the elastic member 230 is arranged in the above-mentioned form, which can make the structure of the elastic support member 233 itself relatively firm and stable. At the same time, this arrangement enables the wind shield and the blade body 100 to be both sleeved on the fixing rod 231, and enables the wind shield and the blade body 100 to be well supported and fixed together by the second and third limit blocks 235 when they are in contact, thereby further enhancing the connection stability between the wind shield and the blade body 100.

[0091] It should be noted that the setting form of the elastic support member 233 is not limited. The two ends of the elastic support member 233 can be fixedly connected to the first and second limit blocks 234 respectively, or can be directly abutted between the first and second limit blocks 234.

[0092] As an example, both ends of the elastic support member 233 are fixedly connected to the first and second limiting blocks 234 respectively.

[0093] It should be noted that the matching form of the elastic support member 233 and the fixed rod 231 is not limited. The elastic support member 233 can be sleeved on the fixed rod 231 (i.e., spirally set) or set parallel to the fixed rod 231 (i.e., linearly set).

[0094] As an example, the elastic support member 233 is sleeved on the fixing rod 231 .

[0095] In other possible embodiments, the elastic member 230 may omit the first limit block 232 and the second limit block 234 , that is, one end of the elastic support member 233 is connected to the fixing rod 231 , and the other end is directly fixedly connected to the windshield.

[0096] It should be noted that, in another implementation of the wind shield 200 , the form of hinge connection achieved through the connecting rod 250 is not limited.

[0097] See Figure 6 、 Figure 8 and Figure 9 As an example, a bidirectional torsion spring 260 is provided on the outer periphery of the connecting rod 250. Both ends of the bidirectional torsion spring 260 are connected to an end of the third wind deflector 240 close to the connecting rod 250. The bidirectional torsion spring 260 is configured to meet the following requirements:

[0098] When the wind force applied to the third wind shield 240 is not higher than the threshold, the first window 110 is closed; when the wind force applied to the third wind shield 240 is higher than the threshold, the bidirectional torsion spring 260 is deformed to open the first window 110.

[0099] Optionally, a plurality of bidirectional torsion springs 260 are provided and are distributed at intervals along the axial direction of the connecting rod 250 .

[0100] See Figure 8 As an example, an elastic limiting component 270 is provided on the outer periphery of the connecting rod 250. The end of the elastic limiting component 270 close to the third wind deflector 240 is connected to the third deflector, and the end of the elastic limiting component 270 away from the third wind deflector 240 is connected to the blade body 100. The elastic limiting component 270 is configured to meet the following requirements:

[0101] When the wind force applied to the third wind shield 240 is not higher than the threshold, the first window 110 is closed; when the wind force applied to the third wind shield 240 is higher than the threshold, the elastic limiting assembly 270 is deformed to open the first window 110.

[0102] Optionally, a plurality of elastic limiting components 270 are provided and are distributed at intervals along the axial direction of the connecting rod 250 .

[0103] In this embodiment, the hinge connection can be realized in various forms by the connecting rod 250 , and more feasible implementation plans can be provided, thereby facilitating promotion and application.

[0104] Furthermore, a plurality of bidirectional torsion springs 260 and elastic limiting assemblies 270 are provided and are distributed at intervals along the axial direction of the connecting rod 250, which can make the connection between the third wind deflector 240 and the blade body 100 more stable and more controllable.

[0105] As an example, the thickness of one end of the third wind shielding plate 240 close to the connecting rod 250 corresponds to the thickness of the connecting rod 250 .

[0106] In this embodiment, the third wind shield 240 is arranged in the above-mentioned form, so that the size of the part of the third wind shield 240 used to connect the bidirectional torsion spring 260 is relatively close to the radial size of the bidirectional torsion spring 260, thereby facilitating the connection of the bidirectional torsion spring 260 to the third wind shield 240.

[0107] It should be noted that the form of the elastic limiting component 270 is not limited.

[0108] See Figure 10 、 Figure 11 and Figure 13 As an example, the elastic limiting assembly 270 includes a connecting member 271 and an elastic limiting piece 272. The elastic limiting piece 272 is connected to the blade body 100. The elastic limiting piece 272 includes two arc-shaped limiting portions 2721 that are relatively distributed and away from each other. The two arc-shaped limiting portions 2721 surround a limiting cavity. The connecting member 271 is sleeved on the periphery of the connecting rod 250. The side of the connecting member 271 close to the third wind deflector 240 is connected to the third wind deflector 240. The side of the connecting member 271 away from the third wind deflector 240 is provided with a protrusion corresponding to the limiting cavity, so that the connecting member 271 can be engaged with the elastic limiting piece 272, and the elastic limiting piece 272 is configured to meet the following requirements:

[0109] When the wind force received by the third windshield 240 is not higher than the threshold, the first window 110 is closed;

[0110] When the wind force applied to the third wind shield 240 is higher than a threshold, the elastic limiting piece 272 is deformed to open the first window 110 .

[0111] In this embodiment, the elastic limiting component 270 is arranged in the above-mentioned form, so that the side of the connecting member 271 close to the elastic limiting piece 272 and the elastic limiting piece 272 can achieve an arc transition, thereby making the third wind deflector 240 more stable when deflected by the wind.

[0112] It should be noted that the connection method between the connecting member 271 and the third wind deflector 240 is not limited.

[0113] See Figure 12 As an example, a limiting groove 2711 is provided on one side of the connecting member 271 close to the third wind shield 240, and the limiting groove 2711 is used to snap-fit ​​with one end of the third wind shield 240 close to the connecting member 271, and along the thickness direction of the third wind shield 240, the connecting member 271 is provided with a pin hole 2712 that passes through the connecting member 271 and is connected to the limiting groove 2711, and the third wind shield 240 is provided with a corresponding through hole so that the third wind shield 240 and the connecting member 271 can be plugged in.

[0114] In this embodiment, the side of the third wind shield 240 close to the connecting member 271 is set to be snap-fitted with the connecting member 271. Furthermore, the corresponding parts of the third wind shield 240 and the connecting member 271 are set to be latch-fitted. The third wind shield 240 and the connecting member 271 are connected together through both snap-fitting and latch-fitting, which can make the connection between the two extremely firm and stable.

[0115] In other possible implementations, the two may be connected by direct welding.

[0116] See Figure 14 In a second aspect, an embodiment of the present application provides a vertical windmill 1, comprising a main shaft 20 and a plurality of leakage blades 10 as provided in the embodiment of the first aspect. The plurality of leakage blades 10 are connected to the main shaft 20, and each leakage blade 10 is configured to revolve around the main shaft 20 and to rotate around its rotation axis 120.

[0117] In the present application, a vertical windmill 1 includes a leaky blade 10 as provided in the first embodiment. When wind speeds are high, the first window 110 and windshield 200 cooperate to protect the blade body 100, thereby ensuring normal power generation by the windmill. Furthermore, the leaky blade 10 is configured to both revolve around the main axis 20 and rotate around its own rotation axis 120. This improves the blade's rotational efficiency, thereby increasing the windmill's power generation efficiency, compared to windmill blades that can only revolve around the main axis 20.

[0118] As an example, the rotation axis 120 is located in the middle of the blade body 100 , and the plurality of first windows 110 are symmetrically arranged about the rotation axis 120 ;

[0119] Optionally, the plurality of first windows 110 located on the same side of the rotating shaft 120 are distributed side by side along the axial direction of the rotating shaft 120 .

[0120] In this embodiment, the rotating shaft 120 is set in the middle of the blade body 100. At the same time, the multiple first windows 110 are set symmetrically about the rotating shaft 120, which can make the overall structure of the blade body 100 more symmetrical, so that the force on the blade body 100 is more balanced when exposed to wind, thereby improving the stability of the blade body 100 when exposed to wind.

[0121] Furthermore, by arranging the multiple first windows 110 located on the same side of the rotating shaft 120 to be distributed side by side along the axial direction of the rotating shaft 120, the overall structure of the blade body 100 can be made more symmetrical, thereby further improving the stability of the blade body 100 when exposed to wind.

[0122] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A leaky blade, characterized in that: include: a blade body, wherein the blade body is provided with a first window; as well as A windshield member is provided corresponding to the first window and is configured to meet the following requirements: When the wind force applied to the wind shield is not higher than a threshold, the wind shield is capable of closing the first window; When the wind force applied to the wind shield is higher than a threshold, the wind shield is capable of opening the first window along the direction of the airflow; The windshield member comprises: A first windshield is provided corresponding to the first window and is configured to meet the following requirements: When the wind force applied to the first wind shield is not higher than a threshold value, the first wind shield abuts against the blade body to close the first window; when the wind force applied to the first wind shield is higher than a threshold value, the first wind shield moves away from the blade body in the direction of the airflow to open the first window. as well as A second windshield, wherein the first windshield is provided with a second window, the second windshield is provided corresponding to the second window, and the second windshield is configured to meet the following requirements: When the wind force applied to the second wind shield is not higher than a threshold value, the second wind shield abuts against the first wind shield to close the second window; when the wind force applied to the second wind shield is higher than a threshold value, the second wind shield moves away from the blade body along the direction of the airflow to open the second window.

2. The air leakage blade according to claim 1, characterized in that: The blade body is provided with a plurality of first windows, and each of the plurality of first windows is provided with the wind shielding member correspondingly.

3. The air leakage blade according to claim 1, characterized in that: The first windshield is connected to the blade body via an elastic member, the elastic member having an elastic restoring force for driving the first windshield close to the blade body, and the elastic member is configured to satisfy: When the wind force applied to the first wind shield is not higher than a threshold value, the elastic restoring force is greater than the wind force, and the first wind shield abuts against the blade body; when the wind force applied to the first wind shield is higher than a threshold value, the elastic restoring force is less than the wind force, and the first wind shield is away from the blade body.

4. The air leakage blade according to claim 3, characterized in that: A plurality of elastic members are provided and are distributed at intervals along the circumference of the first window.

5. The air leakage blade according to claim 3, characterized in that: The elastic member includes a fixing rod, a first limit block, an elastic support member, a second limit block and a third limit block; the first limit block, the second limit block and the third limit block are sequentially spaced along the axial direction of the fixing rod, and the first limit block and the third limit block are fixedly connected to the fixing rod, and the second limit block is slidably connected to the fixing rod, the elastic support member is arranged between the first limit block and the second limit block, and the elastic support member has a driving force to drive the second limit block to approach the third limit block, the first wind deflector and the blade body are both sleeved on the fixing rod and located between the second limit block and the third limit block, and the elastic support member is configured to meet the following requirements: When the wind force applied to the first windshield is not higher than a threshold, the driving force of the elastic support member is greater than the wind force; when the wind force applied to the first windshield is higher than a threshold, the driving force of the elastic support member is less than the wind force.

6. A vertical windmill, characterized in that: include: spindle; as well as A plurality of leakage blades according to any one of claims 1 to 5, wherein the plurality of leakage blades are connected to the main shaft, each of the leakage blades is configured to be able to revolve around the main shaft, and each of the leakage blades is configured to be able to rotate around the rotation axis of the leakage blade.

7. The vertical windmill according to claim 6, characterized in that: The rotation axis is located in the middle of the blade body, and the plurality of first windows are symmetrically arranged about the rotation axis.

8. The vertical windmill according to claim 7, characterized in that: The plurality of first windows located on the same side of the rotating shaft are distributed side by side along the axial direction of the rotating shaft.

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