A wind turbine for generating electricity, its blade structure and rotor

Abstract

A wind turbine and its blade structure and rotor are disclosed. The blade structure includes: a blade body, a movable inner blade, and a drive mechanism. The blade body has a blade cavity with a side opening on the side of the blade body. The movable inner blade is movably installed in the blade cavity. A swivel mount is installed in the blade cavity. An inner shaft is rotatably and adjustablely installed on the swivel mount. A drive bevel gear is coaxially installed on the inner shaft. A driven rack is movably confined within the blade cavity, and the drive bevel gear meshes with the driven rack. The movable inner blade is connected to the driven rack. The inner shaft drives the drive bevel gear to rotate, causing the driven rack to move within the blade cavity, thereby moving the movable inner blade to be retracted into the blade cavity, or causing the movable inner blade to extend out of the blade cavity through the side opening. This solution adjusts the movable inner blade to a suitable position under different conditions to adapt to different wind speed environments, solving the problem that the blade contact section of existing wind turbines is fixed and cannot adapt to different wind speeds.

Description

Technical Field

[0001] This invention relates to the field of wind power generation turbines, and more particularly to a wind power generation turbine and its blade structure and impeller. Background Technology

[0002] A wind turbine is a device that converts the kinetic energy of wind into mechanical kinetic energy, and then into electrical kinetic energy. The wind turbine rotates under the action of wind, converting the kinetic energy of the wind into the mechanical energy of the wind turbine shaft. The generator rotates under the drive of the wind turbine shaft to generate electricity, which is an important form of wind energy utilization.

[0003] As a core component of wind turbines, the blade design directly affects the efficiency and reliability of the entire system. Currently, most wind turbines use fixed-section blades. While this design simplifies manufacturing, it also has limitations. For example, at different wind speeds (such as low or high wind speeds), fixed-section blades can lead to a decrease in turbine efficiency. Furthermore, existing wind turbines are exposed to high temperatures for extended periods, causing the hub temperature to rise. This can lead to aging of bearings and lubrication systems at rotating parts, thus affecting the turbine's lifespan. Summary of the Invention

[0004] The purpose of this invention is to propose a blade structure for a wind turbine, wherein an adjustable inner blade is provided in the blade cavity of the blade body, and the position of the inner blade in the blade cavity is controlled by an inner shaft, so that the inner blade can be adjusted to a suitable position under different conditions to adapt to different wind speed environments.

[0005] The present invention also proposes a wind turbine having the blade structure of the above-mentioned wind power generation turbine.

[0006] The present invention also proposes a wind turbine for generating electricity, which is provided with the above-mentioned wind rotor.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A blade structure for a wind turbine includes: a blade body, a movable inner blade, and a drive mechanism;

[0009] The blade body has a blade cavity, and the blade cavity has a side opening on the side of the blade body; the movable inner blade is movably installed in the blade cavity;

[0010] The drive mechanism includes: a rotary seat, an inner shaft, a driving bevel gear, and a driven rack;

[0011] The rotating base is mounted on the blade cavity; the inner shaft is rotatably and adjustablely mounted on the rotating base; the driving bevel gear is coaxially mounted on the inner shaft; the driven rack is movably limited within the blade cavity, and the driving bevel gear meshes with the driven rack; the movable inner leaf is connected to the driven rack; the inner shaft is used to drive the driving bevel gear to rotate, causing the driven rack to move within the blade cavity, thereby moving the movable inner leaf to be housed within the blade cavity, or causing the movable inner leaf to extend out of the blade cavity through the side opening.

[0012] Alternatively, the drive mechanism may further include: a swing seat and a rotating arm;

[0013] The swing seat is installed in the blade cavity; one end of the movable inner blade is rotatably connected to the swing seat, the other end of the movable inner blade is rotatably connected to one end of the rotating arm, and the other end of the rotating arm is rotatably connected to the driven rack; the driven rack drives the movable inner blade to swing around the swing seat through the rotating arm.

[0014] Alternatively, one end of the blade body may be provided with a leaf root opening that exposes the leaf cavity;

[0015] The movable inner blade has a through-hole cavity inside; the movable inner blade has a first air vent on the side extending from the side opening; a second air vent is provided at one end of the movable inner blade, and the second air vent is close to the blade root opening; the first air vent, the through-hole cavity, the second air vent and the blade root opening are connected.

[0016] Optimally, the movable inner blade has a planar area and a ventilation area on the side extending out of the side opening, and the planar area and the ventilation area extend out of the blade cavity through the side opening in sequence; the first air outlet is disposed in the ventilation area.

[0017] Optimally, the side opening faces or is away from the rotation direction of the blade structure, and the first air outlet is provided with an air outlet slope; the air outlet slope is inclined towards the rotation direction of the blade structure.

[0018] Alternatively, the drive mechanism may further include: a guide member;

[0019] The outer surface of the movable inner blade is provided with a guide groove along the swing path of the movable inner blade; the guide member is installed in the blade cavity; the guide member is limited to the guide groove, and the guide member moves relative to the guide groove.

[0020] A wind turbine rotor includes: a hub and a blade structure;

[0021] The blade bodies of multiple blade structures are mounted on the hub, and some of the blade structures are blade structures of a wind turbine as described above.

[0022] Alternatively, the propeller hub may be provided with a hub cavity;

[0023] One end of the blade body is mounted on the propeller hub, and the blade root opening at one end of the blade body is connected to the propeller hub cavity.

[0024] The driving mechanism further includes: a rotary driver;

[0025] The rotary driver is installed in the propeller hub cavity; the output end of the rotary driver is connected to the inner shaft and is used to drive the inner shaft to rotate.

[0026] Optimally, it also includes: a fan;

[0027] The fan is disposed in the blade hub cavity; one end of the blade hub cavity is connected to the blade root opening, and the blade hub cavity is provided with a third air outlet, which faces or is away from the air outlet position of the fan.

[0028] A wind turbine is provided with the rotor of the aforementioned wind turbine.

[0029] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0030] This solution provides a blade structure for a wind turbine, which has an adjustable inner blade in the blade cavity of the blade body. The position of the inner blade in the blade cavity is controlled by an inner shaft, so that the inner blade can be adjusted to a suitable position under different conditions to adapt to different wind speed environments. This solves the problem that the blade of the existing wind turbine has a fixed cross-section in contact with wind pressure and cannot adapt to different wind speeds. Attached Figure Description

[0031] Figure 1 This is a structural schematic diagram of one embodiment of the wind turbine;

[0032] Figure 2 This is a schematic diagram of one embodiment of the blade structure;

[0033] Figure 3 This is a top view schematic diagram of one embodiment of the movable inner leaf and drive mechanism;

[0034] Figure 4 This is a structural schematic diagram of one embodiment of a wind turbine.

[0035] in:

[0036] Blade body 1, movable inner blade 2, drive mechanism 3; hub 4; fan 5; blade structure 01; blade cavity 11; side opening 12; blade root opening 13; through inner cavity 20; first air outlet 21; second air outlet 22; planar area 23; ventilation area 24; air outlet inclined surface 25; guide groove 26; swivel seat 31; inner shaft 32; driving bevel gear 33; driven rack 34; swing seat 35; rotating arm 36; guide component 37; rotation driver 38; hub cavity 41; third air outlet 42. Detailed Implementation

[0037] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0038] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," "inner side," "outer side," "inner end," "outer end," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0039] like Figure 1-4 A blade structure for a wind turbine includes: a blade body 1, a movable inner blade 2, and a drive mechanism 3;

[0040] The blade body 1 is provided with a blade cavity 11, and the blade cavity 11 is provided with a side opening 12 on the side of the blade body 1; the movable inner blade 2 is movably installed in the blade cavity 11;

[0041] The drive mechanism 3 includes: a rotating base 31, an inner shaft 32, a driving bevel gear 33, and a driven rack 34;

[0042] The rotating base 31 is installed in the blade cavity 11; the inner shaft 32 is rotatably and adjustablely installed in the rotating base 31; the driving bevel gear 33 is coaxially installed in the inner shaft 32; the driven rack 34 is movably limited in the blade cavity 11, and the driving bevel gear 33 meshes with the driven rack 34; the movable inner blade 2 is connected to the driven rack 34; the inner shaft 32 is used to drive the driving bevel gear 33 to rotate, so that the driven rack 34 moves in the blade cavity 11, driving the movable inner blade 2 to move to be housed in the blade cavity 11, or driving the movable inner blade 2 to extend out of the blade cavity 11 through the side opening 12.

[0043] This solution provides a blade structure for a wind turbine, in which an adjustable inner blade 2 is provided in the blade cavity 11 of the blade body 1, and the position of the inner blade 2 in the blade cavity 11 is controlled by the inner shaft 32, so that the inner blade 2 can be adjusted to a suitable position under different conditions to adapt to different wind speed environments, thus solving the problem that the blade of the existing wind turbine has a fixed cross section in contact with wind pressure and cannot adapt to different wind speeds.

[0044] Specifically, the blade body 1 has a blade cavity 11, and the rotating seat 31 can be set in multiple positions of the blade cavity 11; the inner shaft 32 is rotatably and adjustablely mounted on the rotating seat 31, so that the inner shaft 32 is fixed in the blade cavity 11. The driving bevel gear 33 is mounted on the inner shaft 32, and the driving bevel gear 33 rotates synchronously with the inner shaft 32. The rotation of the inner shaft 32 can drive the driving bevel gear 33 to rotate; the driven rack 34 can move in the blade cavity 11, and can be guided by conventional sliders and slide rails. The driven rack 34 is connected to the movable inner blade 2; based on the meshing of the driven rack 34 and the driving bevel gear 33, the rotation of the driving bevel gear 33 can drive the driven rack 34 to move, thereby driving the movable inner blade 2 of the driven rack 34 to move in the blade cavity 11; in the initial state, the movable inner blade 2 is completely retracted into the blade cavity 11, and the side of the movable inner blade 2 is exposed in the side opening 12 of the blade cavity 11 to cover the side opening 12. At this time, the blade structure When the contact area with the airflow is minimized, it is suitable for high wind speeds (wind speed > 10 m / s). When it is necessary to adjust and increase the contact area between the blade structure and the airflow, the inner shaft 32 can be rotated, which drives the movable inner blade 2 to extend outside the blade cavity 11 via the driven rack 34. The movable inner blade 2 extends outside the blade cavity 11 through the side opening 12 to increase the contact area between the blade structure and the airflow. Especially when the movable inner blade 2 is fully extended outside the blade cavity 11, it is suitable for low wind speeds (wind speed < 6 m / s). Furthermore, the area of ​​the movable inner blade 2 extending outside the blade cavity 11 can be determined according to the moving distance of the driven rack 34, thereby adapting to medium wind speeds between high and low wind speeds (6 m / s < wind speed < 10 m / s). In this way, this solution can adjust the movable inner blade 2 to a suitable position under different conditions to adapt to different wind speed environments, solving the problem that the blade contact section of existing wind turbines is fixed and cannot adapt to different wind speeds.

[0045] The inner shaft 32 can be driven to rotate by a rotary actuator 38, which is a known mechanism with a function of driving rotation, such as a motor or a combination of a motor and a reducer.

[0046] Alternatively, the drive mechanism 3 may further include: a swing seat 35 and a rotating arm 36;

[0047] The swing seat 35 is installed in the blade cavity 11; one end of the movable inner blade 2 is rotatably connected to the swing seat 35, the other end of the movable inner blade 2 is rotatably connected to one end of the rotating arm 36, and the other end of the rotating arm 36 is rotatably connected to the driven rack 34; the driven rack 34 drives the movable inner blade 2 to swing around the swing seat 35 through the rotating arm 36.

[0048] The swing seat 35 is located in the blade cavity 11 and is rotatably connected to one end of the movable inner blade 2; the other end of the movable inner blade 2 is rotatably connected to the driven rack 34 via the rotating arm 36; the rotating arm 36 may have multiple degrees of freedom, for example, the two ends of the rotating arm 36 may rotate relative to each other, and / or the two ends of the rotating arm 36 may also rotate between each other; when the driven rack 34 moves horizontally towards the side opening 12, the driven rack 34 drives its rotating arm 36 to move, and the rotating arm 36 drives one end of the movable inner blade 2 connected to it to move, thereby causing one end of the movable inner blade 2 to swing around the swing seat 35, thereby driving the movable inner blade 2 to move to be fully retracted or partially extended out of the blade cavity 11. The rotating arm 36 can adaptively adjust its own angle according to the moving position of the driven rack 34.

[0049] Alternatively, one end of the blade body 1 may be provided with a leaf root opening 13 that exposes the leaf cavity 11;

[0050] The movable inner blade 2 has a through-hole cavity 20 inside; the movable inner blade 2 has a first air vent 21 on the side extending from the side opening 12; a second air vent 22 is provided at one end of the movable inner blade 2, and the second air vent 22 is close to the blade root opening 13; the first air vent 21, the through-hole cavity 20, the second air vent 22 and the blade root opening 13 are connected.

[0051] The movable inner blade 2 is provided with a through cavity 20, which can reduce the overall weight of the movable inner blade 2, thereby reducing the overall weight of the blade body 1 and the load on the drive mechanism 3. When the movable inner blade 2 is driven to extend one side out of the blade cavity 11, it exposes the first air inlet 21 outside the blade body 1; one end of the movable inner blade 2 is provided with a second air inlet 22 near the blade root opening 13 of the blade cavity 11; the blade root opening 13 of the blade body 1 is connected to the propeller hub 4; in this way, the first air inlet 21, the through cavity 20, the second air inlet 22 and the blade root opening 13 are connected to form a channel with a guiding effect, thereby dissipating heat from the propeller hub 4. When the blade structure rotates, the first air inlet 21 of the movable inner blade 2 is adjusted to be exposed outside the blade cavity 11. Depending on the wind direction of the blade structure rotation, the first air inlet 21 can draw in or exhaust air. The air flows through the first air inlet 21, the inner cavity 20, the second air inlet 22 and the blade root opening 13, thereby carrying away the heat of the rotor 4 and improving the wind turbine's heat dissipation effect.

[0052] Alternatively, the movable inner blade 2 has a planar area 23 and a ventilation area 24 on the side extending out of the side opening 12, and the planar area 23 and the ventilation area 24 extend out of the blade cavity 11 through the side opening 12 in sequence; the first air outlet 21 is disposed in the ventilation area 24.

[0053] The movable inner blade 2, located within the blade cavity 11, has a planar area 23 and a ventilation area 24 arranged sequentially from near to far towards the side opening 12. The planar area 23 and the ventilation area 24 are planar structures, and the ventilation area 24 has a first air vent 21. When the movable inner blade 2 rotates around the swing seat 35, the planar area 23 and the ventilation area 24 can pass through the side opening 12 one after the other. The planar area 23 is mainly adjusted for different wind speed environments. Since the ventilation area 24 is close to the end of the rotation range of the movable inner blade 2, when it is necessary to adjust the first air vent 21 to extend outside the blade cavity 11, it is only necessary to drive the driven rack 34 to the moving end to put the blade structure into a heat dissipation state.

[0054] Optimally, the side opening 12 faces or is away from the rotation direction of the blade structure, and the first air outlet 21 is provided with an air outlet slope 25; the air outlet slope 25 is inclined towards the rotation direction of the blade structure.

[0055] like Figure 4The arrow points in the direction of rotation of the blade structure, and the side opening 12 faces the direction of rotation of the blade structure. Therefore, the movable inner blade 2 extends out of the direction of rotation of the blade structure. Since the first air outlet 21 is perpendicular to the direction of rotation of the blade structure, this design makes the inner wall and / or outer wall of the first air outlet 21 inclined to form the air outlet slope 25. The air outlet slope 25 can be located inside the first air outlet 21 or extend outside the first air outlet 21. The air outlet slope 25 is inclined towards the direction of rotation of the blade structure, which can guide or discharge airflow into the side opening 12, thereby inputting or outputting airflow when the blade structure rotates, improving the smoothness of airflow entering and exiting the movable inner blade 2.

[0056] Alternatively, the drive mechanism 3 may further include a guide member 37;

[0057] The outer surface of the movable inner blade 2 is provided with a guide groove 26 along the swing path of the movable inner blade 2; the guide member 37 is installed in the blade cavity 11; the guide member 37 is limited to the guide groove 26, and the guide member 37 moves relative to the guide groove 26.

[0058] The outer surface of the movable inner blade 2 is provided with a guide groove 26, and the guide member 37 of the blade cavity 11 is engaged in the guide groove 26. When the movable inner blade 2 swings around the swing seat 35, the guide member 37 moves relative to the guide groove 26, thereby guiding the movable inner blade 2 to swing along a preset trajectory. At the same time, the guide groove 26 can be provided on one or both sides of the movable inner blade 2 as needed. When the movable inner blade 2 is provided with guide grooves 26 on both sides, the guide members 37 on both sides can jointly limit the swing range of the movable inner blade 2, improving the rotational stability and smoothness of the movable inner blade 2.

[0059] A wind turbine rotor includes: a hub 4 and a blade structure 01;

[0060] The blade bodies 1 of the plurality of blade structures 01 are mounted on the hub 4, and some of the blade structures are blade structures of a wind turbine according to any of the above embodiments.

[0061] This solution allows you to choose either the standard blade structure 01 or the blade structure of the wind turbine as needed.

[0062] Alternatively, the propeller hub 4 may be provided with a propeller hub cavity 41;

[0063] One end of the blade body 1 is installed on the propeller hub 4, and the blade root opening 13 at one end of the blade body 1 is connected to the propeller hub cavity 41.

[0064] The drive mechanism 3 further includes: a rotary driver 38;

[0065] The rotary driver 38 is installed in the propeller hub cavity 41; the output end of the rotary driver 38 is connected to the inner shaft 32 and is used to drive the inner shaft 32 to rotate.

[0066] One end of the blade body 1 is connected to the hub 4, and the blade root opening 13 at one end of the blade body 1 is connected to the hub cavity 41 of the hub 4. The hub cavity 41 can be used to accommodate the rotary actuator 38, thereby avoiding the entire rotary actuator 38 being placed on the blade body 1, so as to reduce the load on the blade body 1. The rotary actuator 38 is used to drive the inner shaft 32 to rotate, thereby driving the movable inner blade 2 to move through the driven rack 34.

[0067] Optimally, it also includes: fan 5;

[0068] The fan 5 is disposed in the blade hub cavity 41; one end of the blade hub cavity 41 is connected to the blade root opening 13, and the blade hub cavity 41 is provided with a third air outlet 42, which faces or is away from the air outlet position of the fan 5.

[0069] The fan 5 is located in the hub cavity 41. The fan 5 can be started as needed to increase the air flow rate in the hub cavity 41. In some embodiments, the first air outlet 21, the inner cavity 20, the second air outlet 22 and the blade root opening 13 are connected in sequence, so air can pass through the first air outlet 21, the inner cavity 20, the second air outlet 22, the blade root opening 13, the hub cavity 41 and the third air outlet 42. Since the first air outlet 21 can draw in or expel air, the air outlet direction of the fan 5 can be set to face the air flow direction. The fan 5 can accelerate the air flow, so that the air flows through the hub cavity 41 to remove the heat of the hub cavity 41 and dissipate heat for the impeller. For example, in one embodiment, the side opening 12 faces the rotation direction of the blade structure, making it easier for the blade structure to draw in air through the side opening 12. When the third air outlet 42 faces the fan 5, the fan 5 blows air into the third air outlet 42, and the air in the hub cavity 41 is output to the outside through the third air outlet 42, thus creating a negative pressure in the hub cavity 41. The hub cavity 41 draws in air through the negative pressure, causing the outside air to pass sequentially through the first air outlet 21, the inner cavity 20, the second air outlet 22, and the blade root opening 13. 3. This dissipates heat from the hub 4 and blade structure 01. For example, in one embodiment, the side opening 12 faces away from the rotation direction of the blade structure, making it easier for air to be discharged through the side opening 12 when the third air outlet 42 faces away from the fan 5. When the fan 5 blows air towards the blade root opening 13, it can draw in external air through the third air outlet 42. The air is then discharged along the airflow output by the fan 5 through the blade root opening 13, the second air outlet 22, the inner cavity 20 and the first air outlet 21, thereby dissipating heat from the hub 4 and blade structure 01.

[0070] A wind turbine is provided with the rotor of the aforementioned wind turbine.

[0071] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A blade structure for a wind turbine, characterized in that, include: The blade body, the movable inner blade, and the drive mechanism; The blade body has a blade cavity, and the blade cavity has a side opening on the side of the blade body; The movable inner leaf is movably installed in the leaf cavity; The drive mechanism includes: a rotary seat, an inner shaft, a driving bevel gear, a driven rack, a swing seat, a rotating arm, and a guide member; The rotating base is mounted on the blade cavity; the inner shaft is rotatably and adjustablely mounted on the rotating base; the driving bevel gear is coaxially mounted on the inner shaft; the driven rack is movably limited within the blade cavity, and the driving bevel gear meshes with the driven rack; the movable inner leaf is connected to the driven rack; the inner shaft is used to drive the driving bevel gear to rotate, causing the driven rack to move within the blade cavity, thereby moving the movable inner leaf to be housed within the blade cavity, or causing the movable inner leaf to extend out of the blade cavity through the side opening; The swing seat is installed in the blade cavity; one end of the movable inner blade is rotatably connected to the swing seat, the other end of the movable inner blade is rotatably connected to one end of the rotating arm, and the other end of the rotating arm is rotatably connected to the driven rack; the driven rack drives the movable inner blade to swing around the swing seat through the rotating arm. One end of the blade body is provided with a blade root opening that exposes the blade cavity; the interior of the movable inner blade is provided with a through-hole cavity; the movable inner blade is provided with a first air vent on the side that extends out of the side opening; one end of the movable inner blade is provided with a second air vent, which is close to the blade root opening; the first air vent, the through-hole cavity, the second air vent, and the blade root opening are connected. The movable inner blade has a planar area and a ventilation area on the side extending out of the side opening, and the planar area and the ventilation area extend out of the blade cavity through the side opening in sequence; the first air outlet is disposed in the ventilation area; The side opening faces or is opposite to the rotation direction of the blade structure, and the first air outlet is provided with an air outlet slope; the air outlet slope is inclined towards the rotation direction of the blade structure; The outer surface of the movable inner blade is provided with a guide groove along the swing path of the movable inner blade; the guide member is installed in the blade cavity; the guide member is limited to the guide groove, and the guide member moves relative to the guide groove.

2. A wind wheel of a wind power generator, characterized by include: Hub and blade structure; The blade bodies of the plurality of blade structures are mounted on the hub, and some of the blade structures are the blade structures of a wind turbine as described in claim 1.

3. A wind wheel for a wind driven generator as defined in claim 2 wherein, The propeller hub is provided with a propeller hub cavity; One end of the blade body is mounted on the propeller hub, and the blade root opening at one end of the blade body is connected to the propeller hub cavity. The driving mechanism further includes: a rotary driver; The rotary driver is installed in the propeller hub cavity; the output end of the rotary driver is connected to the inner shaft and is used to drive the inner shaft to rotate.

4. A wind wheel for a wind driven generator as defined in claim 3 wherein, Also includes: Fan; The fan is disposed in the impeller hub cavity; One end of the propeller hub cavity is connected to the blade root opening, and the propeller hub cavity is provided with a third air outlet, which faces or is away from the air outlet of the fan.

5. A wind power fan, characterized in that The wind turbine is provided with the rotor of the wind power generation turbine as described in claim 4.

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