Self-adaptive lift-drag type wind power blade and vertical axis wind power generator

Abstract

The invention discloses a self-adaptive lift-drag type wind power blade and vertical shaft separation generator. A wind power blade comprises a mounting frame, a driving blade, an elastic reset piece and an inertia piece. The driving blade comprises a fixed blade and a movable blade pivotally arranged on one side of the fixed blade; in the unfolding state, a windsail is formed between the other end of the movable blade and the fixed blade; in the folding state, the movable blades and the fixed blades enclose a lift type blade with a wing-shaped cross section; the elastic reset piece enables the driving blade to have a trend of switching from a folded state to an unfolded state; the inertia part is movably arranged between the position, close to the main shaft, of the mounting frame and the position, far away from the main shaft, of the mounting frame and connected with the pivotal shaft through the flexible inhaul cable, and the flexible inhaul cable drives the driving blade to be switched from the unfolded state to the folded state when tensioned. According to the invention, the forms of the driving blades can be converted in different wind speed environments, and the problems that the vertical-axis wind turbine cannot be started at low wind speed and the wind energy conversion efficiency is low at high wind speed are solved.

Description

Technical Field

[0001] The invention relates to the field of wind power generation, in particular to an adaptive lift-drag wind blade and a vertical axis wind generator. Background Art

[0002] In the related art, vertical axis wind turbines are usually configured with lift-type blades or drag-type blades to capture wind energy.

[0003] The starting wind speed of lift-type blades is relatively high, and they often cannot be started in an environment with lower wind speeds. The starting wind speed of drag-type blades is relatively low, but the wind energy utilization rate is low in an environment with higher wind speeds. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide an adaptive lift-drag wind blade, in which the driving blade can be switched between an unfolded state and a folded state under different wind speed environments, which is conducive to improving the problem that the vertical axis wind turbine cannot be started at low wind speed and has low wind energy conversion efficiency at high wind speed.

[0005] A first aspect of the present invention provides an adaptive lift-drag wind blade, which includes a mounting frame, a driving blade, an elastic reset member, and an inertia member. The mounting frame has a main shaft mounting portion for connecting the main shaft; the driving blade is arranged on the mounting frame, and the driving blade includes a fixed blade and a movable blade arranged on one side of the fixed blade, the fixed blade is fixed on the mounting frame, and one end of the movable blade is connected to the fixed blade through a pivot shaft; the driving blade has an expanded state and a folded state; in the expanded state, the other end of the movable blade is separated from the fixed blade so that a wind hood is formed between the other end of the movable blade and the fixed blade; in the folded state, the other end of the movable blade is against the fixed blade, and the movable blade and the fixed blade enclose a lift-type blade with an airfoil cross-sectional shape; the elastic reset member acts on the movable blade so that the driving blade has a tendency to switch from the folded state to the expanded state; the inertial member is movably arranged between the proximal main shaft position and the distal main shaft position on the mounting frame, and the inertial member is connected to the pivot shaft through a flexible cable, and the flexible cable is configured to drive the driving blade to switch from the expanded state to the folded state when tensioned.

[0006] In some embodiments, a locking assembly is provided on the mounting frame, as well as a locking position and an unlocking position for limiting the movement of the locking assembly; when the locking assembly moves to the locking position on the mounting frame, the locking assembly is used to abut and cooperate with the movable blade, thereby blocking the movable blade from moving toward the fixed blade; when the locking assembly moves to the unlocking position on the mounting frame, the locking assembly disengages from the movable blade, so that the flexible cable drives the driving blade to switch from the unfolded state to the folded state when tensioned.

[0007] In some embodiments, the locking assembly includes a first cable, and the inertial member is connected to the locking assembly via the first cable, so that the first cable drives the locking assembly to an unlocked position when it is tensioned; the mounting frame also has an intermediate position between the proximal spindle position and the distal spindle position; when the inertial member is between the proximal spindle position and the intermediate position, the flexible cable is relaxed, and the first cable is tensioned to drive the locking assembly to an unlocked position; when the inertial member is at the intermediate position and between the intermediate position and the distal spindle position, the flexible cable is tensioned to drive the drive leaf to switch from the expanded state to the folded state, and the first cable is tensioned to keep the locking assembly in the unlocked position; when the inertial member is at the distal spindle position, the flexible cable is tensioned to keep the drive leaf in the folded state.

[0008] In some embodiments, a lock tongue groove is provided on the mounting frame; the locking assembly further comprises a lock tongue and a lock tongue elastic member, the lock tongue is telescopically installed in the lock tongue groove, the lock tongue has a locking position extending out of the lock tongue groove and an unlocking position retracted into the lock tongue groove; the lock tongue elastic member is provided between the lock tongue groove and the lock tongue, and the lock tongue elastic member is compressed so that the lock tongue has a tendency to return to the locking position.

[0009] In some embodiments, the inertia member includes an inertia slider, and the inertia slider is slidably arranged on the first guide rail of the mounting frame along the first direction; the locking assembly also includes a transmission shaft pivotally mounted on the mounting frame, the transmission shaft is used to wind the first cable, the transmission shaft is arranged on one side of the first guide rail and is correspondingly arranged at the middle position; the inertia slider is provided with a rack extending parallel to the first direction, and the outer peripheral surface of the transmission shaft is also provided with a transmission tooth for meshing and transmitting the rack; the rack has a first contact position and a second contact position at both ends thereof, and the rack also has a third contact position between the first contact position and the second contact position;

[0010] The transmission tooth and the rack meet one of the following four conditions:

[0011] (a) when the transmission tooth is engaged at the first contact position, the first cable is tensioned and the flexible cable is relaxed;

[0012] (b) When the transmission tooth is engaged between the first contact position and the third contact position, the first cable is tensioned to drive the locking assembly to move to the unlocking position

[0013] (c) when the transmission tooth is engaged in the third contact position, the inertia member is located at a middle position;

[0014] (d) When the transmission tooth engages the third contact position and is between the third contact position and the second contact position, the first cable is tensioned to keep the locking assembly in the unlocked position, and the flexible cable is tensioned to drive the driving leaf to switch from the unfolded state to the folded state.

[0015] In some embodiments, a second anti-rotation member is fixed on the mounting frame, and the second anti-rotation member is used to abut and cooperate with the movable blade to limit the maximum interval between the movable blade and the fixed blade.

[0016] In some embodiments, the lift-type blade adopts a symmetrical airfoil of the NACA model; one third to one half of the lift-type blade is cut off from the tail to the tip on one side to form the fixed blade; the cut-off portion on the lift-type blade forms an avoidance groove for accommodating the movable blade, and the movable blade is constructed as the cut-off portion of the lift-type blade.

[0017] In some embodiments, the number of the driving blades is at least two; the adaptive lift-drag wind blade also includes a synchronization component, the synchronization component includes a linkage sliding member, a linkage cable and at least two synchronization wheels, the synchronization wheel and the pivot axis of the driving blade are coaxially arranged, the linkage sliding member is connected to the synchronization wheel through the linkage cable to drive multiple synchronization wheels to rotate simultaneously; one end of the flexible cable is connected to the inertia member, and the other end of the flexible cable is connected to the linkage sliding member.

[0018] In some embodiments, a second guide rail and a reversing roller are provided on the mounting frame; the second guide rail is arranged in parallel with the first guide rail on the mounting frame, and the linkage sliding member is slidably fitted on the second guide rail; the reversing roller is arranged between the first guide rail and the second guide rail, and the flexible cable is tensioned on the reversing roller.

[0019] The second aspect of the present invention provides a vertical axis wind turbine, comprising a main shaft; a power generation device, the main shaft being connected to the power generation device; and the adaptive lift-drag type wind blade of the first aspect of the present invention, the adaptive lift-drag type wind blade comprising a plurality of circumferentially spaced apart blades along the main shaft, the mounting frame in the adaptive lift-drag type wind blade being fixedly connected to the main shaft via the main shaft mounting portion.

[0020] The adaptive lift-drag wind blade provided by this embodiment has the following advantages compared with the related art: (1) When the speed of the adaptive lift-drag wind blade is high, the inertial component can move to a position far from the main axis, the inertial component tensions the flexible cable, and the flexible cable drives the driving blade to switch from the unfolded state to the folded state. In the folded state, the movable blade and the fixed blade enclose the lift blade, thereby improving the wind energy conversion efficiency of the adaptive lift-drag wind blade under high wind speed conditions. (2) When the speed of the adaptive lift-drag wind blade is low, although the inertial component has a tendency to move away from the main axis, the centrifugal force of the inertial component is smaller than the reset force, and the reset force of the elastic reset component plays a major role and acts on the movable blade, and the driving blade remains in the unfolded state, so that the adaptive lift-drag wind blade can also rotate around the main axis in a low wind speed environment, which is conducive to improving the problem that the vertical axis wind turbine cannot start at low wind speeds, and the driving blade can capture wind energy more stably. (3) Through the cooperation between the inertial parts, elastic reset parts and driving blades, the adaptive lift-drag wind blades can adapt to different wind speed conditions and optimize the efficiency of wind energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 is a schematic diagram of the overall structure of a vertical axis wind turbine according to an embodiment of the present invention, in which the driving blades in the adaptive lift-drag type wind blades are in a folded state;

[0023] Figure 2 is a schematic diagram of the overall structure of a vertical axis wind turbine according to an embodiment of the present invention, in which the movable blades in the adaptive lift-drag type wind blades are in an unfolded state;

[0024] Figure 3 is a schematic structural diagram of a vertical axis wind turbine according to an embodiment of the present invention;

[0025] Figure 4 and Figure 5is an enlarged view of an adaptive lift-drag wind blade according to an embodiment of the present invention, wherein the inertial slider is located near the main axis;

[0026] Figure 6 and Figure 7 A schematic diagram of the cooperation between the driving leaf and the locking assembly according to an embodiment of the present invention, wherein the movable leaf in the driving leaf is in an unfolded state;

[0027] Figure 8 is a partial enlarged view of a vertical axis wind turbine according to an embodiment of the present invention, in which the movable blades in the adaptive lift-drag type wind blades are in a folded state;

[0028] Fig. 9 is a partial perspective view of an adaptive lift-drag wind blade according to an embodiment of the present invention, used to show the connection relationship between various components in the locking assembly;

[0029] Fig.10 is a schematic diagram of the cooperation between the inertial slider and the transmission shaft according to an embodiment of the present invention, at which time the lock tongue is retracted into the lock tongue groove;

[0030] Fig.11 is a schematic diagram of the cooperation between the inertial slider and the transmission shaft according to an embodiment of the present invention, in which the inertial slider is driven by centrifugal force to approach the transmission shaft;

[0031] Fig.12 is a schematic diagram of the cooperation between the lock tongue and the driving blade according to an embodiment of the present invention;

[0032] Fig.13 is a schematic diagram of the assembly between the synchronization component, the inertia component and the lower beam plate according to an embodiment of the present invention, in which the inertia component is located at a far main axis position;

[0033] Fig.14 is a schematic diagram of the assembly of a synchronization component, an inertia component, a damping spring and an upper beam plate according to an embodiment of the present invention, wherein the inertia component is located at a position far from the main axis;

[0034] Fig.15 is a schematic diagram of the assembly between the second anti-rotation member, the lock tongue and the movable blade according to an embodiment of the present invention, and also shows a schematic diagram of the assembly between the elastic reset member, the synchronous wheel and the pivot shaft;

[0035] Fig.16 is a partial perspective view of an adaptive lift-drag wind blade according to an embodiment of the present invention, used to show the structure of an oil storage tank;

[0036] Fig.17 It is a schematic diagram of the partial structure of an adaptive lift-drag wind blade according to an embodiment of the present invention.

[0037] Reference numerals:

[0038] Vertical axis wind turbine 1000;

[0039] Adaptive lift-drag wind blade 100, main shaft 200, upper end cover 301, lower end cover 302;

[0040] The mounting frame 1, the first guide rail 11, the first stopper 111, the second stopper 112, the locking tongue groove 12, the main shaft mounting portion 13, the second guide rail 14, the reversing roller 15, the upper beam plate 16, the lower beam plate 17, and the protective cover 18;

[0041] Driving blade 2, fixed blade 21, avoidance groove 211, movable blade 22, pivot shaft 23, oil filling hole 24, oil storage tank 25;

[0042] Elastic reset member 3;

[0043] Locking assembly 4, locking tongue 41, locking tongue elastic member 42, first cable 43, transmission shaft 44, transmission gear 441, reversing bracket 45, locking reversing wheel 46, second anti-rotation member 47;

[0044] Inertial member 5, rack 51, first contact position 511, second contact position 512, third contact position 513, inertial slider 52, flexible cable 53;

[0045] Synchronous assembly 6, linkage sliding member 61, linkage cable 62, synchronous wheel 63, tension wheel 64;

[0046] Damping spring 7. DETAILED DESCRIPTION

[0047] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Reference below Figure 1-Figure 17 An adaptive lift-drag wind blade 100 and a vertical axis wind turbine 1000 according to an embodiment of the present invention are described.

[0051] Embodiment 1

[0052] like Figure 1 , Figure 3 and Fig.17 As shown, this embodiment provides an adaptive lift-drag wind blade 100 , which includes a mounting frame 1 , a driving blade 2 , an elastic reset member 3 and an inertia member 5 .

[0053] The mounting frame 1 has a spindle mounting portion 13 for connecting the spindle 200 .

[0054] The driving blade 2 is arranged on the mounting frame 1, and the driving blade 2 includes a fixed blade 21 and a movable blade 22 arranged on one side of the fixed blade 21. The fixed blade 21 is fixed on the mounting frame 1, and one end of the movable blade 22 is connected to the fixed blade 21 through a pivot shaft 23. The driving blade 2 has an unfolded state and a folded state. In the unfolded state, the other end of the movable blade 22 is separated from the fixed blade 21 so that a wind hood is formed between the other end of the movable blade 22 and the fixed blade 21; in the folded state, the other end of the movable blade 22 abuts against the fixed blade 21, and the movable blade 22 and the fixed blade 21 enclose a lift-type blade with an airfoil-shaped cross-section.

[0055] It should be noted that the movable blade 22 and the fixed blade 21 enclose a lift blade, and the cross-sectional shape of the lift blade is an airfoil. This model uses a symmetrical airfoil of the NACA type, and the curvature of the surfaces on both sides of the blade is the same. That is, the surface of the lift blade close to the main shaft 200 and the surface of the lift blade away from the main shaft 200 are symmetrical curved profiles. Figure 6 As shown, the driving blade 2 includes two relatively movable parts, namely, a fixed blade 21 and a movable blade 22. The fixed blade 21 can be constructed as a lift-type blade with a remaining portion of one third to one half cut off from the blade tail to the blade tip on one side, and the movable blade 22 is constructed as the cut-off portion of the above lift-type blade, and one end of the cut-off portion is connected to the remaining portion through a pivot shaft 23. Therefore, when the movable blade 22 is stored, the fixed blade 21 and the movable blade 22 can be enclosed to form a lift-type blade.

[0056] The elastic return member 3 acts on the movable blade 22 , and the elastic return member 3 can make the driving blade 2 have a tendency to switch from the folded state to the unfolded state.

[0057] The inertia member 5 is movably arranged on the mounting frame 1, and can move between a proximal spindle position and a distal spindle position on the mounting frame 1. The inertia member 5 is connected to the pivot shaft 23 via a flexible cable 53, and the flexible cable 53 is configured to drive the driving leaf 2 to switch from an unfolded state to a folded state when tensioned.

[0058] In a specific application scenario, the adaptive lift-drag wind blade 100 is fixedly connected to the main shaft 200 through the main shaft mounting portion 13. The main shaft 200 is the pivot center of the vertical axis wind turbine 1000, and the adaptive lift-drag wind blade 100 rotates around the main shaft 200. When the mounting frame 1 rotates along with the main shaft 200, the inertial member 5 has a tendency to move from the near main shaft position to the far main shaft position. The near main shaft position is the end of the mounting frame 1 close to the main shaft mounting portion 13, and the far main shaft position is the end of the mounting frame 1 far from the main shaft mounting portion 13. That is to say, when the adaptive lift-drag wind blade 100 rotates around the main shaft 200, the inertial block has a tendency to move away from the rotation center, that is, the inertial block has a tendency to move away from the near main shaft position and toward the far main shaft position.

[0059] The inertial member 5 is a rotating mass block. When the adaptive lift-drag wind blade 100 rotates around the main axis 200 , the inertial member 5 generates centrifugal force due to its own mass and the rotation radius.

[0060] When the wind speed is high, the inertial member 5 gradually moves to the far main axis position, the flexible cable 53 is gradually tightened and drives the pivot shaft 23 to rotate after being tightened, and the pivot shaft 23 drives the movable blade 22 to overcome the elastic reset force, so that the other end of the movable blade 22 gradually approaches the fixed blade 21 until it abuts against the fixed blade 21, driving the blade 2 to face the wind in the folded state with the structure of a lift-type blade.

[0061] When the wind speed is relatively low, the other end of the movable blade 22 is spaced apart from the fixed blade 21, and the wind force can act on the wind hood formed between the other end of the movable blade 22 and the fixed blade 21; although the inertial member 5 still has a tendency to move to the far main axis position, due to the low wind speed and small centrifugal force, the pivot shaft 23 cannot drive the movable blade 22 to overcome the reset force, so that under the dominant action of the elastic reset member 3, the driving blade 2 is still in the expanded state.

[0062] The adaptive lift-drag wind blade 100 provided according to the present embodiment has the following advantages compared with the related art: (1) When the rotation speed of the adaptive lift-drag wind blade 100 is high, the inertial member 5 can move to a position close to the main axis, the inertial member 5 tensions the flexible cable 53, and the flexible cable 53 drives the driving blade 2 to switch from the unfolded state to the folded state. In the folded state, the movable blade 22 and the fixed blade 21 enclose a lift-type blade, thereby improving the wind energy conversion efficiency of the adaptive lift-drag wind blade 100 under high wind speed conditions. (2) When the rotation speed of the adaptive lift-drag wind blade 100 is low, although the inertial member 5 has a tendency to move away from the main shaft 200, the centrifugal force of the inertial member 5 is smaller than the reset force, and the reset force of the elastic reset member 3 plays a major role and acts on the movable blade 22, and the drive blade 2 remains in the unfolded state, so that the adaptive lift-drag wind blade 100 can also rotate around the main shaft 200 in a low wind speed environment, which is conducive to improving the problem that the vertical axis wind turbine 1000 cannot start at low wind speeds, and the drive blade 2 can capture wind energy more stably. (3) Through the cooperation between the inertial member 5, the elastic reset member 3 and the drive blade 2, the adaptive lift-drag wind blade 100 can adapt to different wind speed conditions and optimize the efficiency of wind energy utilization.

[0063] Further, Fig.15 and Fig.17 The schematic diagram of the assembly between the elastic reset member 3 and the pivot shaft 23 is shown, and the movable blade 22 is connected to the fixed blade 21 through the pivot shaft 23; the elastic reset member 3 is constructed as a plane scroll spring sleeved on the pivot shaft 23, one end of the plane scroll spring is fixed to the pivot shaft 23, and the other end of the plane scroll spring is fixed to the fixed blade 21. The elastic force of the plane scroll spring can drive the pivot shaft 23 to rotate, thereby driving the movable blade 22 to move, so that the driving blade 2 can rotate from the folded state to the unfolded state. By adopting the pivot shaft 23 and the plane scroll spring, the adaptive lift-drag type wind blade 100 has a lower cost and a more stable structure.

[0064] like Figure 3 As shown, it is further explained that a protective cover 18 is also provided on the mounting frame 1, and a receiving cavity is enclosed between the protective cover 18 and the mounting frame 1, and the elastic reset member 3 and a part of the pivot shaft 23 are arranged in the receiving cavity. One end of the plane scroll spring is fixed to the pivot shaft 23, and the other end of the plane scroll spring can also be fixed to the protective cover 18, that is, one end of the plane scroll spring changes position with the rotation of the pivot shaft 23, and the other end of the plane scroll spring is fixed relative to the pivot shaft 23, so that the plane scroll spring can store and release elastic potential energy.

[0065] like Figure 6 , Figure 7 and Fig.16As shown, in a specific embodiment, a stator blade 21 is provided with an avoidance groove 211, and the avoidance groove 211 can be used to accommodate the movable blade 22. A lift-type blade is cut off from one side of the blade tail to the blade tip by one third to one half to form the stator blade 21, and the cut-off portion of the lift-type blade forms the avoidance groove 211, and the movable blade 22 is constructed as the cut-off portion of the lift-type blade.

[0066] Embodiment 2

[0067] Furthermore, a locking assembly 4 is also provided on the mounting frame 1, and the locking assembly 4 is movably arranged on the mounting frame 1 and can move between a locking position and an unlocking position. When the locking assembly 4 moves to the locking position, the locking assembly 4 abuts and cooperates with the movable blade 22, thereby preventing the movable blade 22 from moving toward the fixed blade 21; when the locking assembly 4 moves to the unlocking position, the locking assembly 4 disengages from the movable blade 22, so that the flexible cable 53 drives the driving blade 2 to switch from the unfolded state to the folded state when tensioned. By providing the locking assembly 4, the other end of the movable blade 22 can be prevented from approaching the fixed blade 21 under the drive of the wind, so that the driving blade 2 can remain in the unfolded state, and the driving blade 2 can continuously and stably capture wind energy.

[0068] According to the adaptive lift-drag wind blade 100 provided in this embodiment, by setting the locking assembly 4, the movable blade 22 can be kept in the expanded state more stably, and the accidental movement of the movable blade 22 caused by external unstable airflow or other minor interference factors can be avoided to a certain extent, thereby reducing the influence of unstable airflow on the energy capture of the driving blade 2.

[0069] Embodiment 3

[0070] like Figure 3 , Fig.10 and Fig.17 As shown, further, the locking assembly 4 includes a first cable 43, and the inertial member 5 is connected to the locking assembly 4 through the first cable 43 so that the first cable 43 drives the locking assembly 4 to move to the unlocking position when it is tensioned; the mounting frame 1 also has an intermediate position between the proximal main axis position and the distal main axis position. When the inertial member 5 is located between the proximal main axis position and the intermediate position, the flexible cable 53 is relaxed, and the first cable 43 is tensioned to drive the locking assembly 4 to move to the unlocking position; when the inertial member 5 is located at the intermediate position and between the intermediate position and the distal main axis position, the first cable 43 is tensioned to keep the locking assembly 4 in the locked position, and the flexible cable 53 is tensioned to drive the leaf to move from the unfolded state to the folded state. That is to say, the inertial member 5 is also linked with the locking assembly 4, and the inertial member 5 can drive the locking assembly 4 to move from the locked position to the unlocking position.

[0071] Specifically, first, when the inertial member 5 is located between the proximal spindle position and the middle position, the locking assembly 4 is located at the locking position, and the driving blade 2 is in the unfolded state. The flexible cable 53 is relaxed, the inertial member 5 is subjected to the centrifugal force and moves toward the distal spindle position, the first cable 43 is always in a tensioned state, and the first cable 43 drives the locking assembly 4 from the locking position to the unlocking position under the drive of the inertial member 5.

[0072] The inertia member 5 continues to move, and when the inertia member 5 is located between the middle position and the distal spindle position, the locking assembly 4 is located in the unlocked position. At this time, the first cable 43 is still in a tensioned state to keep the locking assembly 4 in the unlocked position; the inertia member 5 drives the flexible cable 53 to be tensioned, and the flexible cable 53 drives the pivot shaft 23 to rotate, thereby driving the movable blade 22 to overcome the reset force and gradually approach the fixed blade 21.

[0073] When the inertial member 5 is located at the far main axis position, the driving blade 2 is in a folded state, and the movable blade 22 and the fixed blade 21 enclose a lift blade with an airfoil-shaped cross-section.

[0074] Embodiment 4

[0075] like Fig. 9 As shown, further, a lock tongue groove 12 is opened on the mounting frame 1; the locking assembly 4 also includes a lock tongue 41 and a lock tongue elastic member 42, the lock tongue 41 is telescopically installed in the lock tongue groove 12, and the lock tongue 41 has a locking position extending out of the lock tongue groove 12 and an unlocking position retracted into the lock tongue groove 12; the lock tongue elastic member 42 is arranged between the lock tongue groove 12 and the lock tongue 41, and the lock tongue elastic member 42 is compressed so that the lock tongue 41 has a tendency to return to the locking position.

[0076] In combination with the above embodiments, it can be seen that Fig.17 As shown, first, when the inertial member 5 is located between the proximal spindle position and the middle position, the locking assembly 4 is located in the locking position, the flexible cable 53 is relaxed, the inertial member 5 is subjected to the centrifugal force and moves toward the distal spindle position, the first cable 43 is always in a tensioned state, and the first cable 43, driven by the inertial member 5, drives the lock tongue 41 to move from the locking position to the unlocking position, that is, the first cable 43 drives the lock tongue 41 to gradually retract into the lock tongue groove 12.

[0077] The inertia member 5 continues to move. When the inertia member 5 is located between the middle position and the distal spindle position, the locking assembly 4 is located in the unlocking position, that is, the first cable 43 drives the lock tongue 41 to fully retract into the lock tongue groove 12. At this time, the first cable 43 is still in a tensioned state to offset the elastic force of the lock tongue elastic member 42. The inertia member 5 drives the flexible cable 53 to be tensioned, and the flexible cable 53 drives the pivot shaft 23 to rotate, thereby driving the movable blade 22 to overcome the reset force and gradually approach the fixed blade 21.

[0078] When the inertial member 5 is located at the far main axis position, the driving blade 2 is in a folded state, and the movable blade 22 and the fixed blade 21 enclose a lift blade with an airfoil-shaped cross-section.

[0079] Embodiment 5

[0080] like Figure 3 and Fig.17 As shown, further, the inertial member 5 includes an inertial slider 52, which is slidably arranged on the first guide rail 11 of the mounting frame 1 along the first direction; the locking assembly 4 also includes a transmission shaft 44, which can be pivotally mounted on the mounting frame 1, and the transmission shaft 44 is used to wind the first cable 43, and the transmission shaft 44 is arranged on one side of the first guide rail and correspondingly arranged in the middle position. A rack 51 extending parallel to the first direction is provided on the inertial slider 52, and a transmission tooth 441 for meshing with the transmission rack 51 is also provided on the outer circumference of the transmission shaft 44. The rack 51 has a first contact position 511 and a second contact position 512 at both ends thereof, and the rack 51 also has a third contact position 513 between the first contact position 511 and the second contact position 512. The transmission shaft 44 and the inertial slider 52 are meshed and transmitted through the rack 51 and the transmission tooth 441. The rack 51 has a certain length in the first direction. Along the first direction, there are a first contact position 511 at one end of the rack 51 , a second contact position 512 at the other end of the rack 51 , and a third contact position 513 between the two ends of the rack 51 .

[0081] The transmission tooth 441 and the rack 51 satisfy one of the following four conditions:

[0082] (a) When the transmission tooth 441 is engaged at the first contact position 511, the first cable 43 is tensioned and the flexible cable 53 is relaxed;

[0083] (b) when the transmission tooth 441 is engaged between the first contact position 511 and the third contact position 513 , the first cable 43 is tensioned to drive the locking assembly 4 to move to the unlocking position;

[0084] (c) When the transmission tooth 441 is engaged at the third contact position 513, the inertia member 5 is located at the middle position. That is, when the transmission tooth 441 is engaged at the third contact position 513 of the rack 52, the inertia slider 51 and the transmission shaft 44 have a specific relative position, and the inertia member 5 is exactly located at the middle position of the mounting frame 1. At this time, the locking assembly 4 is fully moved to the unlocked position, and the lock tongue 41 is retracted into the lock tongue groove 12, and will not block the movement of the movable leaf 22. (d) When the transmission tooth 441 is engaged between the third contact position and the second contact position and at the third contact position, the first cable 43 is tensioned to keep the locking assembly 4 in the unlocked position, and the flexible cable 53 is tensioned to drive the drive leaf 2 to switch from the unfolded state to the folded state.

[0085] Specifically:

[0086] (1) Driven by centrifugal force, the inertial slider 52 gradually moves from the proximal spindle position to the middle position, so that the first contact position 511 of the rack 51 and the transmission tooth 441 on the transmission shaft 44 begin to mesh and transmit.

[0087] (2) The rack 51 continues to slide in the first direction, and the transmission tooth 441 of the transmission shaft 44 continues to mesh between the first contact position 511 and the third contact position 513 of the rack 51; the transmission shaft 44 winds up the first cable 43 to drive the lock tongue 41 to gradually retract into the lock tongue groove 12;

[0088] (3) The rack 51 continues to slide along the first direction, the third contact position 513 of the rack 51 meshes with the transmission tooth 441, and the lock tongue 41 is completely retracted into the lock tongue groove 12. At the same time, the inertial slider 52 tightens the flexible cable 53, and the flexible cable 53 drives the pivot shaft 23 to rotate and drives the driving leaf 2 to gradually switch from the unfolded state to the folded state;

[0089] (4) When the inertial slider 52 moves to the far main axis position, the driving leaf 2 is in a folded state.

[0090] like Figure 3 and Fig.17 As shown, further, a first guide rail 11 extending along a first direction is fixed on the mounting frame 1, and the inertial member 5 includes an inertial slider 52 slidably matched with the first guide rail 11; the first guide rail 11 is provided with a first stop member 111 and a second stop member 112 spaced apart in the first direction for limiting the sliding stroke of the inertial slider 52, and the inertial slider 52 slides along the first guide rail 11 between the first stop member 111 and the second stop member 112, which helps to prevent the inertial slider 52 from deviating from the preset trajectory and improve the driving stability of the inertial member 5.

[0091] like Figure 3 and Fig.17 As shown, in a specific example, the first stopper 111 is disposed on one end of the first guide rail 11 close to the spindle mounting portion 13, and the second stopper 112 is disposed on one end of the first guide rail 11 away from the spindle mounting portion 13. When the inertial slider 52 slides from the far spindle position to the near spindle position, the inertial slider 52 is close to the first stopper 111 and away from the second stopper 112.

[0092] like Figure 3 and Fig.17 As shown, further, a damping spring 7 is provided on one of the inertial slider 52 or the second stopper 112, which can absorb the collision energy between the inertial slider 52 and the second stopper 112, thereby reducing the possibility of damage caused by collision and improving the stability and reliability of the structure.

[0093] like Fig. 9 As shown, further, the locking tongue 41 assembly also includes a reversing bracket 45 and a locking reversing wheel 46. The locking reversing wheel 46 is rotatably mounted on the reversing bracket 45, and the first cable 43 changes the pulling direction through the locking reversing wheel 46, so that the pulling direction of the first cable 43 is consistent with the moving direction of the locking tongue 41.

[0094] Embodiment 6

[0095] Combination Fig.12 and Fig.13 As shown, further, a second stopper 47 is fixed on the mounting frame 1, and the second stopper 47 is used to abut and cooperate with the movable blade 22 to limit the maximum interval between the movable blade 22 and the fixed blade 21. The other end of the movable blade 22 moves along the rotation path, and the two ends of the rotation path are stopped by the fixed blade 21 and the second stopper 47 respectively, so that the movable blade 22 can be controllably set in the rotation path.

[0096] Combining the above-mentioned embodiment 3, it can be seen that if Figure 6 , Figure 7 and Fig.15 As shown, the adaptive lift-drag wind blade also includes a second stopper 47, which is fixed on the mounting frame 1; when the locking assembly 4 is in the locking position, the driving blade 2 is in the unfolded state, and the second stopper 47 and the lock tongue 41 abut against and cooperate with different sides of the movable blade 22. On the moving path of the movable blade 22, the mounting frame 1 is provided with a lock tongue 41 and a second stopper 47 in sequence, and the lock tongue 41 is configured as a guide slope on the side away from the second stopper 47, and the guide slope gradually inclines toward the side away from the lock tongue groove 12 and toward the side of the second stopper 47, thereby, during the moving process of the driving blade 2 from the folded state to the unfolded state, the movable blade 22 moves toward one side of the second stopper 47, and the movable blade 22 pushes the lock tongue 41 back into the lock tongue groove 12 through the guide slope. The second stopper 47 is also provided with an anti-collision rubber ring, which is conducive to absorbing the collision energy between the movable blade 22 and the second stopper 47.

[0097] Embodiment 7

[0098] like Figure 7 As shown, further, the lift-type blade is cut off one-third to one-half from the tail to the tip on one side to form a fixed blade 21; the cut-off portion on the lift-type blade forms an avoidance groove 211 for accommodating the movable blade 22, and the movable blade 22 is constructed as the cut-off portion of the lift-type blade, and one end of the cut-off portion (i.e., the movable blade 22) is connected to the fixed blade 21 via a pivot shaft 23.

[0099] Embodiment 8

[0100] Combination Figure 1 , Figure 3 , Figure 5 and Fig.17 As shown, further, there are at least two driving blades 2; the adaptive lift-drag wind blade 100 also includes a synchronization component 6, which includes a linkage sliding member 61, a linkage cable 62 and at least two synchronization wheels 63, the synchronization wheel 63 and the pivot shaft 23 are coaxially arranged, the linkage sliding member 61 is connected to the synchronization wheel 63 through the linkage cable 62 to drive multiple synchronization wheels 63 to rotate simultaneously; the inertial member 5 is connected to the linkage sliding member 61 through a flexible cable 53. The synchronization component 6 is used to drive multiple driving blades 2 to move synchronously, which can improve the energy capture efficiency. At the same time, the synchronization component 6 drives the two active blades 22 to unfold and close simultaneously, and adopts a mechanical structure for transmission, which is simpler in structure and more reliable.

[0101] like Figure 2 and Figure 6 As shown, further, the locking assembly 4 is arranged between two adjacent groups of driving blades 2. The two movable blades 22 are arranged facing each other, and the movable blade 22 of one driving blade 2 is rotated clockwise to unfold, and the movable blade 22 of the other driving blade 2 is rotated counterclockwise to unfold. Therefore, a locking assembly 4 includes a locking tongue 41 and a second stop 47, and the locking tongue 41 can abut on the two movable blades 22 at the same time, and the second stop 47 can abut and cooperate on the two movable blades 22 at the same time, thereby reducing the layout cost.

[0102] like Figure 3 and Fig.17 As shown, further, the mounting frame 1 is provided with a second guide rail 14 and a reversing roller 15; the second guide rail 14 is arranged in parallel with the first guide rail 11 on the mounting frame 1, and the linkage sliding member 61 is slidably fitted on the second guide rail 14; the reversing roller 15 is arranged between the first guide rail 11 and the second guide rail 14, and the flexible cable 53 is tensioned on the reversing roller 15. By providing the reversing roller 15, the moving directions of the inertial slider 52 and the linkage sliding member 61 are changed from the same to the opposite, so that the size of the mounting frame 1 in the first direction can be reduced, so that the first guide rail 11 and the second guide rail 14 are arranged in parallel in the first direction, and the structure of the adaptive lift-drag type wind blade 100 is more compact.

[0103] Embodiment 9

[0104] like Figure 1 and Figure 2As shown, the second embodiment of the present invention provides a vertical axis wind turbine 1000, which includes a main shaft 200, a power generation device, and an adaptive lift-drag wind blade 100 according to the first embodiment of the present invention. The main shaft 200 is connected to the power generation device, the adaptive lift-drag wind blade 100 includes a plurality of blades arranged at intervals along the circumference of the main shaft 200, and the mounting frame 1 in the adaptive lift-drag wind blade 100 is fixedly connected to the main shaft 200 through the main shaft mounting portion 13.

[0105] The vertical axis wind turbine 1000 in this embodiment has the following advantages by adopting the above-mentioned adaptive lift-drag wind blade 100: (1) When the rotation speed of the adaptive lift-drag wind blade 100 is high, the inertial member 5 can move to the far main axis position, the inertial member 5 tensions the flexible cable 53, and the flexible cable 53 drives the driving blade 2 to switch from the unfolded state to the folded state. In the folded state, the movable blade 22 and the fixed blade 21 enclose a lift blade, thereby improving the wind energy conversion efficiency of the adaptive lift-drag wind blade 100 under high wind speed conditions. (2) When the rotation speed of the adaptive lift-drag wind blade 100 is low, although the inertial member 5 has a tendency to move away from the main shaft 200, the centrifugal force of the inertial member 5 is smaller than the reset force, and the reset force of the elastic reset member 3 plays a major role and acts on the movable blade 22, and the drive blade 2 remains in the unfolded state, so that the adaptive lift-drag wind blade 100 can also rotate around the main shaft 200 in a low wind speed environment, which is conducive to improving the problem that the vertical axis wind turbine 1000 cannot start at low wind speeds, and the drive blade 2 can capture wind energy more stably. (3) Through the cooperation between the inertial member 5, the elastic reset member 3 and the drive blade 2, the adaptive lift-drag wind blade 100 can adapt to different wind speed conditions and optimize the efficiency of wind energy utilization.

[0106] According to the following Figure 1-Figure 17 A specific embodiment will be described below.

[0107] like Figure 1-Figure 3 , Fig.17 As shown, the vertical axis wind turbine 1000 includes a main shaft 200, a power generation device and an adaptive lift-drag wind blade 100. The main shaft 200 is extended in the vertical direction, the main shaft 200 is connected to the power generation device, the adaptive lift-drag wind blade 100 includes three circumferentially spaced apart along the main shaft 200, two adjacent adaptive lift-drag wind blades 100 are spaced 120° apart, and the mounting frame 1 in the adaptive lift-drag wind blade 100 is fixedly connected to the main shaft 200 through the main shaft mounting portion 13. The adaptive lift-drag wind blade 100 is used to capture wind energy and drive the main shaft 200 to rotate, and the power generation device converts wind energy into electrical energy.

[0108] like Figure 1 and Figure 2As shown, specifically, the vertical axis wind turbine 1000 also includes an upper end cover 301 and a lower end cover 302 fixed at both ends of the main shaft 200, and the adaptive lift-drag wind blade 100 includes a mounting frame 1, and the mounting frame 1 is constructed as an upper beam plate 16 and a lower beam plate 17, and the upper beam plate 16 and the lower beam plate 17 are both arranged along the radial direction of the main shaft 200, one end of the upper beam plate 16 has a main shaft mounting portion 13 for connecting to the upper end cover 301, and one end of the lower beam plate 17 has a main shaft mounting portion 13 for connecting to the lower end cover 302.

[0109] The driving blade 2 is disposed on the other end of the upper end cover 301 and the other end of the lower end cover 302 .

[0110] Combination Figure 1 and Figure 3 As shown, each adaptive lift-drag wind blade 100 further includes two driving blades 2 , an elastic reset member 3 , an inertia member 5 , a locking assembly 4 and a synchronization assembly 6 .

[0111] like Figure 2 , Figure 5-Figure 7 As shown, the driving blade 2 includes a fixed blade 21 and a movable blade 22. The upper end of the fixed blade 21 is fixed to the upper beam plate 16, and the lower end of the fixed blade 21 is fixed to the lower beam plate 17. The fixed blade 21 is provided with an avoidance groove 211, and the avoidance groove 211 can be used to accommodate the movable blade 22. The driving blade 2 has an unfolded state and a folded state. In the unfolded state, the other end of the movable blade 22 is separated from the fixed blade 21 so that a wind hood is formed between the other end of the movable blade 22 and the fixed blade 21; in the folded state, the other end of the movable blade 22 abuts against the fixed blade 21, and the movable blade 22 and the fixed blade 21 enclose a lift blade with an airfoil cross-sectional shape. The lift blade has an airfoil cross-sectional shape. The lift blade is cut off by half from the tail to the tip of one side to form the fixed blade 21. The cut-off portion of the lift blade forms the avoidance groove 211, and the movable blade 22 is constructed as the cut-off portion of the above lift blade. The movable blade 22 is installed in the avoidance groove 211 through the pivot shaft 23, and the movable blade 22 can rotate relative to the fixed blade 21. When the driving blade 2 is in the unfolded state, the other end of the movable blade 22 is separated from the fixed blade 21 so that a wind hood is formed between the other end of the movable blade 22 and the fixed blade 21; when the driving blade 2 is in the folded state, the movable blade 22 is stored in the avoidance groove 211, and the movable blade 22 and the fixed blade 21 are enclosed to form a lift-type blade.

[0112] like Figure 3 and Fig.16 As shown, an oil storage tank 25 is also provided on the fixed blade 21, and the oil outlet end of the oil storage tank 25 is connected to the pivot shaft 23 to add lubricating oil to the pivot shaft 23; the oil storage tank 25 is arranged in the protective cover 18, and the protective cover 18 has a refueling hole 24 connected to the oil storage tank 25.

[0113] like Figure 6 and Figure 7 As shown, there are two driving blades 2, and the two movable blades 22 are arranged opposite to each other. The movable blade 22 of one driving blade 2 rotates clockwise to unfold, and the movable blade 22 of the other driving blade 2 rotates counterclockwise to unfold.

[0114] Combination Figure 3 , Figure 4 , Figure 5 and Fig.15 As shown, the synchronization assembly 6 includes a linkage sliding member 61, a linkage cable 62 and two synchronization wheels 63. The synchronization wheels 63 are coaxially arranged with the pivot shaft 23. The linkage sliding member 61 is connected to the synchronization wheels 63 through the linkage cable 62 to drive the multiple synchronization wheels 63 to rotate simultaneously. The inertia member 5 is connected to the linkage sliding member 61 through a flexible cable 53. The synchronization assembly 6 is used to drive the multiple driving blades 2 to move synchronously.

[0115] like Figure 5 As shown, a linkage reversing wheel is further provided on the linkage sliding member 61, and a linkage cable 62 is wound around the linkage reversing wheel and connected to one synchronous wheel 63 at one end and to another synchronous wheel 63 at the other end. The axis connecting line of the two synchronous wheels 63 is parallel to the first direction, and a tensioning wheel 64 is further provided between the linkage reversing wheel and one of the synchronous wheels 63, so that the linkage cables 62 on both sides of the linkage reversing wheel are staggered.

[0116] Combination Figure 5 , Figure 6 , Figure 7 , Fig. 9 , Fig.10 , Fig.11 and Fig.13 As shown, the locking assembly 4 includes a locking tongue 41, a locking tongue elastic member 42, a first cable 43 and two second anti-rotation members 47. Fig. 9 The upper beam plate 16 is provided with a lock tongue groove 12, and the lock tongue 41 is retractably arranged in the lock tongue groove 12. The inertia member 5 is connected to the lock tongue 41 through the first cable 43 to drive the lock tongue 41 to retract into the lock tongue groove 12. The elastic force of the lock tongue elastic member 42 is applied to the lock tongue 41 so that the lock tongue 41 has a tendency to extend out of the lock tongue groove 12. Figure 2 and Fig.13 As shown, the two second anti-rotation members 47 are respectively fixed on the upper beam plate 16 and the lower beam plate 17. When the driving blade 2 is in the unfolded state, the second anti-rotation member 47 and the locking assembly 4 abut against different sides of the movable blade 22. Figure 7As shown, on the moving path of the movable blade 22 from the folded state to the unfolded state, a locking tongue 41 and a second stopper 47 are sequentially arranged on the mounting frame 1. The locking tongue 41 is configured as a guide bevel on the side away from the second stopper 47. The guide bevel gradually inclines toward the side away from the locking tongue groove 12 and toward the side of the second stopper 47. Thus, during the moving process of the driving blade 2 from the folded state to the unfolded state, the movable blade 22 moves toward the side of the second stopper 47, and the movable blade 22 pushes the locking tongue 41 to retract into the locking tongue groove 12 through the guide bevel. An anti-collision rubber ring is also arranged on the second stopper 47, which is conducive to absorbing the collision energy between the movable blade 22 and the second stopper 47. The second stopper 47 is used to limit the maximum rotation position of the movable blade 22, and the fixed blade 21 is used to limit the minimum rotation position of the movable blade 22. The locking tongue 41 extends out of the locking tongue groove 12 to prevent the driving blade from moving from the unfolded state to the folded state. The locking tongue 41 and the second stopper 47 are both located between the two driving blades 2.

[0117] Combination Figure 3 , Fig. 9 and Fig.10 As shown, the locking assembly 4 further includes a transmission shaft 44, which is mounted on the mounting frame 1 and can pivot relative to the mounting frame 1. A first cable 43 is wound around the transmission shaft 44. A first guide rail 11 is laid on the upper beam plate 16 and the lower beam plate 17. The first guide rail 11 extends along a first direction, which is parallel to the radial direction of the main shaft 200. The transmission shaft 44 is located on one side of the first guide rail 11. The inertial member 5 includes an inertial slider 52 that is slidably matched with the first guide rail 11. A rack 51 is provided on the inertial slider 52. A transmission tooth 441 is provided on the outer peripheral surface of the transmission shaft 44. The transmission tooth 441 is matched with the rack 51 to rotate the transmission shaft 44. That is to say, the inertial slider 52 passes through the transmission shaft 44, and the rack 51 on the inertial slider 52 meshes with the transmission tooth 441 on the transmission shaft 44, so that the inertial slider 52 can drive the transmission shaft 44 to rotate, thereby driving the first cable 43 wound around the transmission shaft 44 to tighten, and the first cable 43 drives the lock tongue 41 to retract into the lock tongue groove 12. The inertial slider 52 slides along the first guide rail 11 between the first stopper 111 and the second stopper 112, and the transmission shaft 44 is arranged on one side of the first guide rail 11 and correspondingly arranged in the middle position, which is conducive to the stability and reliability of the meshing transmission of the transmission tooth 441 and the rack 51. The installation position of the transmission shaft 44 can be adjusted according to actual conditions. The lock tongue 41 assembly also includes a reversing bracket 45 and a locking reversing wheel 46. The locking reversing wheel 46 is rotatably installed on the reversing bracket 45, and the first cable 43 changes the pulling direction through the locking reversing wheel 46, so that the pulling direction of the first cable 43 is consistent with the activity direction of the lock tongue 41.

[0118] like Figure 3As shown, the inertial slider 52 is connected to the linkage sliding member 61 through a flexible cable 53, and the upper beam plate 16 and the lower beam plate 17 are provided with a second guide rail 14 and a reversing roller 15; the second guide rail 14 is arranged in parallel with the first guide rail 11 on the mounting frame 1, and the linkage sliding member 61 is slidably fitted on the second guide rail 14; the reversing roller 15 is arranged between the first guide rail 11 and the second guide rail 14, and the flexible cable 53 is tensioned on the reversing roller 15. The reversing roller 15 is arranged on one end of the upper beam plate 16 close to the main shaft 200.

[0119] like Fig.10 As shown, the elastic return member 3 is constructed as a plane scroll spring sleeved on the pivot shaft 23, one end of the plane scroll spring is fixed to the pivot shaft 23, and the other end of the plane scroll spring is fixed to the fixed blade 21. The elastic force of the plane scroll spring can drive the pivot shaft 23 to rotate, thereby driving the movable blade 22 to move, so that the movable blade 22 can rotate from the folded state to the unfolded state.

[0120] like Figure 4-Figure 7 , Figure 8 , Fig.10 , Figure 13-Figure 14 As shown, first, when the inertial member 5 is located between the proximal spindle position and the middle position, the locking assembly 4 is located at the locking position, the flexible cable 53 is relaxed, and the inertial member 5 is subjected to the centrifugal force and moves toward the distal spindle position. Then, the first contact position 511 of the rack 51 and the transmission shaft 44 begin to mesh and transmit. When the inertial slider 52 continues to slide toward the distal spindle position, the transmission shaft 44 meshes between the first contact position 511 and the third contact position 513 of the rack 51, and the transmission shaft 44 winds the first cable 43, which drives the lock tongue 41 to move from the locking position to the unlocking position, that is, the first cable 43 drives the lock tongue 41 to gradually retract into the lock tongue groove 12.

[0121] The inertial slider 52 continues to move toward the distal spindle position, the rack 51 continues to slide along the distal spindle position, and the transmission teeth of the transmission shaft 44 continue to engage between the first contact position 511 and the third contact position 513 of the rack 51; the transmission shaft 44 is wound, and after the first cable 43 is tensioned, the lock tongue 41 is driven to gradually retract into the lock tongue groove 12.

[0122] The rack 51 continues to slide along the distal spindle position, and when the inertial slider 52 is at the middle position, the third contact position 513 of the rack 51 meshes with the transmission tooth, and the lock tongue 41 is completely retracted into the lock tongue groove 12. At the same time, the inertial slider 52 tightens the flexible cable 53, and the flexible cable 53 drives the pivot shaft 23 to rotate and drives the driving leaf 2 to gradually switch from the unfolded state to the folded state.

[0123] The inertia member 5 continues to move. When the inertia member 5 is located between the middle position and the distal spindle position, the locking assembly 4 is located in the unlocking position, that is, the first cable 43 drives the lock tongue 41 to fully retract into the lock tongue groove 12. At this time, the first cable 43 is still in a tensioned state to offset the elastic force of the lock tongue elastic member 42. The inertia member 5 drives the flexible cable 53 to be tensioned, and the flexible cable 53 drives the pivot shaft 23 to rotate, thereby driving the movable blade 22 to overcome the reset force and gradually approach the fixed blade 21.

[0124] Therefore, the minimum length of the rack 51 in the first direction should be greater than the interval between the middle position and the distal spindle position.

[0125] When the inertial member 5 is located at the far main axis position, the driving blade 2 is in a folded state, and the movable blade 22 and the fixed blade 21 enclose a lift blade with an airfoil-shaped cross-section.

[0126] Other structures and operations of the vertical axis wind turbine 1000 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here. In the description of the present invention, "first feature" and "second feature" may include one or more of these features. Among them, the up-down direction, left-right direction and front-back direction are based on the up-down direction, left-right direction and front-back direction shown in the figure.

[0127] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0128] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0129] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An adaptive lift-drag wind blade, characterized in that: include: A mounting frame (1) having a spindle mounting portion (13) for connecting to a spindle (200); A driving blade (2) is arranged on the mounting frame (1), the driving blade (2) comprising a fixed blade (21) and a movable blade (22) arranged on one side of the fixed blade (21), the fixed blade (21) is fixed on the mounting frame (1), and one end of the movable blade (22) is connected to the fixed blade (21) via a pivot shaft (23); The driving blade (2) has an unfolded state and a folded state; In the unfolded state, the other end of the movable blade (22) is separated from the fixed blade (21) so that a wind hood is formed between the other end of the movable blade (22) and the fixed blade (21); In the folded state, the other end of the movable blade (22) abuts against the fixed blade (21), and the movable blade (22) and the fixed blade (21) enclose a lift-type blade having an airfoil-shaped cross-section; an elastic return member (3), the elastic return member (3) acting on the movable blade (22) so as to cause the driving blade (2) to have a tendency to switch from the folded state to the unfolded state; An inertia member (5) is movably disposed between a proximal spindle position and a distal spindle position on the mounting frame (1), the inertia member (5) being connected to the pivot shaft (23) via a flexible cable (53), the flexible cable (53) being configured to drive the drive leaf (2) to switch from the unfolded state to the folded state when tensioned.

2. The adaptive lift-drag wind blade according to claim 1, characterized in that: The mounting frame (1) is provided with a locking assembly (4), as well as a locking position and an unlocking position for limiting the movement of the locking assembly (4); When the locking assembly (4) moves to the locking position on the mounting frame (1), the locking assembly (4) is used to abut and cooperate with the movable blade (22), thereby preventing the movable blade (22) from moving toward the fixed blade (21); When the locking assembly (4) moves to the unlocking position on the mounting frame (1), the locking assembly (4) is disengaged from the movable blade (22), so that the flexible cable (53) drives the driving blade (2) to switch from the unfolded state to the folded state when being tensioned.

3. The adaptive lift-drag wind blade according to claim 2, characterized in that: The locking assembly (4) comprises a first cable (43), and the inertia member (5) is connected to the locking assembly (4) via the first cable (43), so that the first cable (43) drives the locking assembly (4) to move to an unlocking position when being tensioned; The mounting frame (1) also has an intermediate position located between the proximal spindle position and the distal spindle position; When the inertia member (5) is located between the proximal spindle position and the intermediate position, the flexible cable (53) is relaxed, and the first cable (43) is tightened to drive the locking assembly (4) to move to an unlocking position; When the inertia member (5) is located at the middle position and between the middle position and the distal main axis position, the flexible cable (53) is tensioned to drive the drive leaf (2) to switch from the unfolded state to the folded state, and the first cable (43) is tensioned to keep the locking assembly (4) in the unlocked position; When the inertial member (5) is located at the distal main axis position, the flexible cable (53) is tensioned to keep the driving leaf (2) in the folded state.

4. The adaptive lift-drag wind blade according to claim 3, characterized in that: The mounting frame (1) is provided with a locking tongue groove (12); The locking assembly (4) further comprises a locking tongue (41) and a locking tongue elastic member (42); the locking tongue (41) is telescopically mounted in the locking tongue groove (12); the locking tongue (41) has a locking position extending out of the locking tongue groove (12) and an unlocking position retracted into the locking tongue groove (12); The lock tongue elastic member (42) is disposed between the lock tongue groove (12) and the lock tongue (41), and the lock tongue elastic member (42) is compressed so that the lock tongue (41) has a tendency to return to the locking position.

5. The adaptive lift-drag wind blade according to claim 3 or 4, characterized in that: The inertia member (5) comprises an inertia slider (52), and the inertia slider (52) is slidably disposed on a first guide rail (11) of the mounting frame (1) along a first direction; The locking assembly (4) further comprises a transmission shaft (44) pivotally mounted on the mounting frame (1), the transmission shaft (44) being used to wind the first cable (43), the transmission shaft (44) being arranged on one side of the first guide rail (11) and correspondingly arranged at the middle position; The inertial slider (52) is provided with a rack (51) extending parallel to the first direction, and the outer peripheral surface of the transmission shaft (44) is also provided with a transmission tooth (441) for meshing and transmitting the rack (51); The rack (51) has a first contact position (511) and a second contact position (512) at both ends thereof, and the rack (51) also has a third contact position (513) between the first contact position (511) and the second contact position (512); The transmission tooth (441) and the rack (51) satisfy one of the following four conditions: (a) when the transmission tooth (441) is engaged at the first contact position (511), the first cable (43) is tensioned and the flexible cable (53) is relaxed; (b) When the transmission tooth (441) is engaged between the first contact position (511) and the third contact position (513), the first cable (43) is tensioned to drive the locking assembly (4) to move to the unlocking position (c) when the transmission tooth (441) is engaged at the third contact position (513), the inertia member (5) is located at a middle position; (d) When the transmission tooth (441) is engaged between the third contact position (513) and the second contact position (512), the first cable (43) is tensioned to keep the locking assembly (4) in the unlocked position, and the flexible cable (53) is tensioned to drive the driving leaf (2) to switch from the unfolded state to the folded state.

6. The adaptive lift-drag wind blade according to claim 1, characterized in that: A second rotation-stopping member (47) is fixed on the mounting frame (1), and the second rotation-stopping member (47) is used to abut against and cooperate with the movable blade (22) to limit the maximum interval between the movable blade (22) and the fixed blade (21).

7. The adaptive lift-drag wind blade according to claim 1, characterized in that: The lift blade adopts a symmetrical airfoil of NACA type; The lift-type blade is cut off one third to one half from the blade tail to the blade tip on one side to form the fixed blade (21); the cut-off portion on the lift-type blade forms an avoidance groove (211) for accommodating the movable blade (22); the movable blade (22) is constructed as the cut-off portion of the lift-type blade.

8. The adaptive lift-drag wind blade according to claim 1, characterized in that: The number of the driving blades (2) is at least two; The adaptive lift-drag wind blade (100) further comprises a synchronization component (6), the synchronization component (6) comprising a linkage sliding member (61), a linkage cable (62) and at least two synchronization wheels (63), the synchronization wheel (63) and the pivot shaft (23) of the driving blade (2) being coaxially arranged, the linkage sliding member (61) being connected to the synchronization wheel (63) via the linkage cable (62) to drive the plurality of synchronization wheels (63) to rotate simultaneously; One end of the flexible cable (53) is connected to the inertia member (5), and the other end of the flexible cable (53) is connected to the linkage sliding member (61).

9. The adaptive lift-drag wind blade according to claim 8, characterized in that: The mounting frame (1) is provided with a second guide rail (14) and a reversing roller (15); The second guide rail (14) is arranged in parallel with the first guide rail (11) on the mounting frame (1), and the linkage sliding member (61) is slidably engaged on the second guide rail (14); The reversing roller (15) is arranged between the first guide rail (11) and the second guide rail (14), and the flexible cable (53) is tensioned on the reversing roller (15).

10. A vertical axis wind turbine, characterized in that: include: spindle(200); A power generation device, the main shaft (200) being connected to the power generation device; According to any one of claims 1 to 9, the adaptive lift-drag wind blade (100) comprises a plurality of mounting frames (1) arranged at intervals in the circumferential direction of the main shaft (200), and the mounting frame (1) in the adaptive lift-drag wind blade (100) is fixedly connected to the main shaft (200) via the main shaft mounting portion (13).

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