Wind catcher and vertical axis wind turbine

Abstract

The application relates to the field of wind power generation technology, in particular to a wind catching device and a vertical shaft wind turbine, which comprises a main shaft, a plurality of blades and a plurality of track arms, wherein the plurality of blades are symmetrically arranged on the wall of the main shaft, one end of the blade is movably connected to the main shaft, the other end of the blade is a free end and can swing towards or away from the main shaft, so that the blade can be switched between a folding state and an unfolding state; the plurality of track arms are arranged on the main shaft corresponding to each blade, one end of the track arm is movably connected to the main shaft, the other end of the track arm is a free end and can swing towards or away from the main shaft, so that the track arm can be switched between a folding state and an unfolding state; the free end of the blade is matched with the track arm, and the track arm is used for limiting the swing track of the free end of the blade after being unfolded. The application has the effects of improving the anti-typhoon capability and stability, and guaranteeing the safety and normal operation of the power generation device.

Description

Technical Field

[0001] This application relates to the field of wind power generation technology, and in particular to a wind capture device and a vertical axis wind turbine. Background Technology

[0002] Vertical axis wind turbines (VAWTs) are a type of wind power generation device where the rotor's axis of rotation is perpendicular to the horizontal plane. Compared to horizontal axis wind turbines (HAWTs), VAWTs have a lower center of gravity, resulting in less aerodynamic stress fatigue, requiring smaller floating structures, thus reducing energy costs. Furthermore, their faster wake dissipation allows for denser installation in wind farms, reducing space requirements.

[0003] Meanwhile, the design of vertical axis wind turbines must also consider the impact of various weather phenomena, with typhoons having a particularly significant impact. Especially during offshore operations, the strong winds and waves brought by typhoons may exceed the design load of the power generation equipment, leading to damage, breakage, or failure. In addition, typhoons may also cause sea level fluctuations and tidal changes, further exacerbating the operational risks of wind power generation equipment.

[0004] Therefore, there is an urgent need to provide a new vertical axis wind turbine solution that can improve its typhoon resistance and stability, and ensure the safety and normal operation of the power generation unit. Summary of the Invention

[0005] To improve typhoon resistance and stability, and to ensure the safety and normal operation of power generation equipment, this application provides a wind-catching device and a vertical axis wind turbine.

[0006] Firstly, the wind-catching device provided in this application adopts the following technical solution:

[0007] A wind-catching device, comprising:

[0008] spindle;

[0009] Several blades are symmetrically arranged on the peripheral wall of the main shaft. One end of each blade is movably connected to the main shaft, and the other end is a free end that can swing toward or away from the main shaft, so that the blade can switch between a retracted state and an extended state.

[0010] Several track arms are respectively arranged on the main shaft corresponding to each of the blades. One end of each track arm is movably connected to the main shaft, and the other end is a free end that can swing toward or away from the main shaft, so that the track arm can switch between a retracted state and an extended state.

[0011] The free end of the blade is adapted to the track arm, and the track arm, when deployed, is used to limit the swing trajectory of the free end of the blade.

[0012] By adopting the above technical scheme, in normal operation, the free end of the track arm swings away from the main shaft direction to make the track arm in the unfolded state, and then the free end of the blade swings along the track arm to the free end of the blade, which makes the blade also in the unfolded state, so that the wind energy can be captured by the cooperation of multiple blades to drive the main shaft to rotate for wind power generation. When a typhoon or other strong storm weather phenomenon occurs, the free end of the blade moves along the track arm to the root of the track arm, which can realize the folding of the blade, so that the blade is in the folded state. Then the free end of each track arm also swings to the folded state. At this time, since the blade and the track arm are folded, the impact and load of the wind on the blade and the track arm can be reduced, the damage risk of the generator by the wind can be reduced, and the typhoon resistance of the wind power generation device can be improved.

[0013] Optionally, it further comprises:

[0014] A plurality of retaining tracks are respectively fixed to the main shaft corresponding to each track arm, and the retaining tracks are matched with the free end of the blade.

[0015] The track shaft swings to the unfolded state and is connected with the retaining track. The free end of the blade can reciprocate between the track arm in the unfolded state and the retaining track.

[0016] By adopting the above technical scheme, when the blade and the track arm need to be folded, the free end of the blade moves along the track arm to the retaining track, which can make the folding of the blade more compact on the one hand, and on the other hand, the root of the track arm will no longer cooperate with the free end of the blade. In this state, when the track arm is folded, the free end of the blade can be avoided to interfere, so that the track arm can be completely folded. When the operation is performed, the track arm swings to the unfolded state again and is connected with the retaining track. The free end of the blade can also move along the retaining track to the track arm again to realize the unfolding action of the blade.

[0017] Optionally, it further comprises:

[0018] A reversing wheel is rotatably arranged at the free end of the track arm.

[0019] A first roller is reciprocatingly arranged on the main shaft.

[0020] A first traction rope is wound around the reversing wheel, and the two ends of the first traction rope are wound around the first roller in a forward and reverse manner, respectively. The first traction rope (132) is connected to the free end of the blade to drive the blade to move along the track arm.

[0021] By adopting the technical scheme, when the blades need to be unfolded, the first roller rotates to drive the first traction rope to pay out on the side connected with the blades, and the other side of the first traction rope is also reeled in synchronously, so that the traction rope can drive the free end of the blades to swing to an unfolded state; when the blades need to be folded, the first roller reverses to drive the traction rope to rotate, so that the blades can be folded.

[0022] Optionally, the track arm is provided with a track shaft along the swing track of the blades.

[0023] The holding track is provided with a butt joint sliding shaft.

[0024] The track arm swings to an unfolded state, and the track shaft is butt jointed with the butt joint sliding shaft.

[0025] The free end of the blade is movably connected with a sliding piece for adapting to the track shaft and the butt joint sliding shaft.

[0026] By adopting the technical scheme, when the blades need to be unfolded, the first roller rotates to drive the first traction rope to pay out on the side connected with the blades, and the other side of the first traction rope is also reeled in synchronously, so that the traction rope can drive the free end of the blades to swing to an unfolded state; when the blades need to be folded, the first roller reverses to drive the traction rope to rotate, so that the blades can be folded.

[0027] Optionally, the application further comprises:

[0028] The second roller is reciprocatingly arranged on the main shaft.

[0029] The second traction rope is wound and fixed to the second roller at one end, and the other end of the second traction rope is connected to the middle or end of the track arm, for driving the track arm to swing.

[0030] By adopting the technical scheme, the second roller cooperates with the second traction rope to pull the track arm, which can control the swing of the track arm and hold the track arm, so as to improve the rigidity and stability of the track arm, so that the track arm can more effectively resist bending stress and improve the carrying capacity.

[0031] Optionally, the connection part of the blade and the main shaft is located at the lower end of the blade, and the upper end of the blade serves as the free end.

[0032] The connection part of the track arm and the main shaft is located above the blade, and the track arm can swing downward and be folded on the outer side of the blade.

[0033] Optionally, the application further comprises:

[0034] The support arm is fixed to the main shaft and is arranged above the track arm.

[0035] The pulley is rotatably arranged on the upper end of the support arm, and the second traction rope passes through the pulley and is connected to the track arm.

[0036] Optionally, further comprising:

[0037] A wind sensor arranged on the upper end of the main shaft and configured to detect a wind level.

[0038] A background control system configured to receive the wind level data detected by the wind sensor.

[0039] By using the above technical solution, during operation, the wind level can be intuitively observed by the wind sensor, and the blade and the track arm can be adjusted and controlled according to the wind level.

[0040] Optionally, further comprising:

[0041] A blade driving component configured to drive the blade to swing.

[0042] A track arm driving component configured to drive the track arm to swing.

[0043] The background control system is electrically connected to the blade driving component and the track arm driving component.

[0044] When the wind level detected by the wind sensor received by the background control system exceeds a threshold value, the blade driving component and the track arm driving component can be driven to move, so as to drive the blade and the track arm to be folded.

[0045] When the wind level detected by the wind sensor received by the background control system is lower than the threshold value, the blade driving component and the track arm driving component can be driven to move, so as to drive the track arm and the blade to be unfolded.

[0046] By using the above technical solution, the connection of the background control system, the blade driving component and the track arm driving component can automatically control the folding and unfolding of the blade and the track arm according to the wind level detected by the wind sensor, without the need for separate operation, so as to ensure that the folding and unfolding can be timely adapted to different weather conditions.

[0047] In a second aspect, the application provides a vertical axis wind turbine, which adopts the following technical solution:

[0048] The vertical axis wind turbine comprises the wind catching device.

[0049] In summary, the application has at least one of the following beneficial technical effects:

[0050] 1. In normal operation, the free end of the track arm swings away from the main shaft direction to make the track arm in the unfolded state, then the free end of the blade swings along the track arm until the free end of the blade swings to the free end of the blade, which makes the blade also in the unfolded state, so that the wind energy can be captured by the cooperation of multiple blades to drive the main shaft to rotate for wind power generation, and when encountering typhoon and other strong storm weather phenomena, the free end of the blade moves along the track arm to the root of the track arm, which can realize the folding of the blade to make the blade in the folded state, then the free end of each track arm also swings to the folded state, at this time, since the blade and the track arm are folded, the impact and load of the wind on the blade and the track arm can be reduced, the damage risk of the generator by the wind can be reduced, and the typhoon resistance of the wind power generation device can be improved;

[0051] 2. When the blade and the track arm need to be folded, the free end of the blade moves along the track arm to the holding track, on the one hand, the folding of the blade can be more compact, and on the other hand, the root of the track arm will no longer cooperate with the free end of the blade, in this state, when the track arm is folded, the free end of the blade can be avoided to interfere, so that the track arm can be completely folded, and when the operation is performed, the track arm swings to the unfolded state again and is connected with the holding track, the free end of the blade can also move along the holding track to the track arm again to realize the unfolding action of the blade. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 is the overall structure schematic diagram of the wind capturing device in the embodiment of the application;

[0053] Figure 2 is Figure 1 the enlarged schematic diagram of A part in

[0054] Figure 3 is Figure 1 the enlarged schematic diagram of B part in

[0055] Figure 4 is the schematic diagram of the first roller and the second roller structure in the wind capturing device of the embodiment of the application;

[0056] Figure 5 is the schematic diagram of the reversing wheel structure in the wind capturing device of the embodiment of the application;

[0057] Figure 6 is the schematic diagram of the guide wire mechanism in the wind capturing device of the embodiment of the application;

[0058] Figure 7 is Figure 1 the enlarged schematic diagram of C part in

[0059] Explanation of reference signs: 1, main shaft; 11, connecting sleeve; 12, bearing plate; 13, first roller frame; 131, first roller; 132, first traction rope; 2, blade; 21, wire guide mechanism; 211, wire guide frame; 212, first wire guide roller; 213, second wire guide roller; 3, track arm; 31, track shaft; 32, support shaft; 33, first reinforcing structure; 34, closing plate; 35, ear plate; 36, receiving box; 361, reversing wheel; 362, wire guide shaft; 4, bearing ring; 41, support arm; 42, retaining track; 421, butt joint slide shaft; 422, limiting column; 423, second reinforcing structure; 43, through hole; 5, sliding piece; 51, first pulley set; 511, first pulley frame; 512, first guide pulley; 513, first limiting pulley; 52, second pulley set; 521, second pulley frame; 522, second guide pulley; 523, second limiting pulley; 6, support arm; 61, first reinforcing frame; 62, second reinforcing frame; 63, bottom plate; 64, first pulley box; 641, first pulley; 65, second pulley box; 651, second pulley; 7, second roller frame; 71, second roller; 72, second traction rope. DETAILED DESCRIPTION

[0060] The application will be further described in detail below with reference to the accompanying drawings.

[0061] The application discloses a wind catching device, which is applied to a vertical shaft fan, mainly suitable for offshore or coastal wind power generation areas where typhoons frequently occur, and of course, can also be applied to other wind power generation scenes or related scenes.

[0062] The scheme of the application will be described below in combination with the specific operation state of the wind catching device.

[0063] Reference Figure 1 The wind catching device mainly comprises a main shaft 1, a plurality of blades 2, and a plurality of track arms 3. The main shaft 1 is vertically arranged, the plurality of blades 2 are uniformly arranged on the surface of the main shaft 1, one end of each blade 2 is movably connected to the main shaft 1, and the other end thereof as a free end can swing relative to the main shaft 1, so that the blade 2 can be switched between two states of folding and unfolding. Each track arm 3 is correspondingly arranged above each blade 2, and one end of each track arm 3 is movably connected to the main shaft 1, and the other end thereof as a free end can swing relative to the main shaft 1, so that each track arm 3 can also be switched between two states of folding and unfolding. The track arm 3 is further formed with an adaptive part along the swing track of the free end of the blade 2, so that the free end of the blade 2 can swing along the track arm 3.

[0064] Due to the structural arrangement of the blades 2 and the track arms 3, when each track arm 3 swings to the unfolded state away from the main shaft 1, the free end of each blade 2 can move along the extension direction of the track arm 3 to guide and limit the movement track of the free end of each blade 2, and when each blade 2 swings to the folded state, the swing of each track arm 3 can also be realized on the outer side of each blade 2.

[0065] With the above main scheme, during operation, each track arm 3 is first swung to the unfolded state, and then the free end of each blade 2 is driven to move along the track arm 3 to the free end position of the track arm 3, so that the unfolding of the blade 2 is also realized, which can be used for wind power capture during normal operation to drive the main shaft 1 to rotate; when a strong storm such as a typhoon occurs, the free end of each blade 2 is driven to swing along the track arm 3 to the folding state away from the main shaft 1, and then each track arm 3 is also driven to swing to the folding state, so that the impact and load of the wind on the blade 2 can be reduced, the damage risk of the generator by the wind can be reduced, and the typhoon resistance of the wind power generation device can be improved.

[0066] Specifically, in the scheme, the main shaft 1 adopts a tapered cylindrical structure with a smaller diameter at the upper end than at the lower end, which can be made of high-strength corrosion-resistant metal materials such as stainless steel, or high-strength metal coated with a corrosion-resistant coating. The lower end of the main shaft 1 is used to connect the wind energy conversion device to convert the captured wind energy into electrical energy. With this structure, the main shaft 1 can be designed to be lightweight while ensuring its stiffness and strength, thereby reducing material costs and transportation and installation costs, reducing vibration during operation, improving equipment stability and reliability, and reducing energy consumption to improve wind power generation efficiency.

[0067] In addition, in other schemes of the present application, the overall structure of the main shaft 1 can also be other cylindrical structures, such as a prismatic cylindrical structure, to further increase the strength of the main shaft 1, or a support skeleton can be added inside the main shaft 1, or a solid columnar structure made of high-strength lightweight material can be directly used. That is, on the basis of reducing the mass of the main shaft 1 as much as possible, the strength and support capacity of the main shaft 1 are ensured.

[0068] The plurality of blades 2 are symmetrically arranged around the main shaft 1, and the number of blades 2 can be determined according to the structural characteristics of the wind turbine, the characteristics of the wind field, and the aerodynamic performance and other factors. For ease of description, three blades 2 are taken as an example in the embodiment

[0069] Each blade 2 is vertically arranged, and the lower end of each blade 2 is hinged to the main shaft 1, and the upper end serves as a free end that can swing towards or away from the main shaft 1. When each blade 2 swings towards the main shaft 1 to fit on the main shaft 1, the blade 2 is in the folded state, and when each blade 2 swings away from the main shaft 1 to a predetermined angle, the blade 2 is in the unfolded state.

[0070] Further, since the main shaft 1 is a conical cylindrical structure in the scheme of the application, the outer peripheral surface is a curved surface, therefore, in order to facilitate the connection of the main shaft 1 and the blade 2, the main shaft 1 is provided with a connecting sleeve 11 at the position corresponding to the connection with the blade 2, the connecting sleeve 11 is coaxially sleeved and fixed on the main shaft 1, and the connecting sleeve 11 is formed as a vertical surface at the connecting position with the blade 2, which is used for hinging with the blade 2, in addition, in order to reduce the volume of the connecting sleeve 11 as much as possible, and at the same time realize the connection of the connecting sleeve 11 with the three blades 2, in the scheme, the overall design of the connecting sleeve 11 is a hexagonal structure, and the three blades 2 are connected to the vertical surfaces of the connecting sleeve 11 at intervals.

[0071] The track arm 3 is provided corresponding to each blade 2, that is, in the scheme of the application, the track arm 3 also adopts three roots, and the three track arms 3 are respectively provided corresponding to the three blades 2, and each track arm 3 is located above each blade 2, one end of the track arm 3 is movably connected to the main shaft 1, and the other end of the track arm 3 extends away from the direction of the main shaft 1. Since the track arm 3 is used to limit the swing track of the free end of the blade 2, the track arm 3 is arc-shaped as a whole, and the curvature of the track arm 3 is the same as the curvature of the swing track of the free end of the blade 2.

[0072] The free end of the blade 2 is movably connected to the track arm 3, that is, when the track arm 3 swings to the position where the extension track of the track arm 3 coincides with the swing track of the free end of the blade 2, the track arm 3 is in an unfolded state, and the free end of the blade 2 can swing along the track arm 3, and when the free end of the blade 2 swings to the free end of the track arm 3, the blade 2 is in an unfolded state, and when the blade 2 swings to the root of the track arm 3, the blade 2 is in a folded state, and when the blade 2 is in a folded state, the track arm 3 swings downward to the outside of the blade 2 in a folded state, and the track arm 3 will also be folded in a folded state.

[0073] The connection relationship between the track arm 3, the main shaft 1 and the blade 2 will be described in detail below:

[0074] Referring to Figure 1 and Figure 2 , the track arm 3 includes a track shaft 31, a support shaft 32 and a first reinforcing structure 33.

[0075] The track shaft 31 is arc-shaped, and the curvature of the track shaft 31 is the same as the curvature of the swing track of the free end of the blade 2, so as to facilitate the adaptation with the movable end of the blade 2. In the scheme of the application, the track shaft 31 is provided as four roots, but it is not limited to four roots, and the number of track shafts 31 can be determined according to different designs. The four track shafts 31 are arranged horizontally, and the distance between the two track shafts 31 located in the middle is less than the distance between the two track shafts 31 located outside.

[0076] The support shaft 32 is located above the track shaft 31, and the support shaft 32 is also arranged in an arc along the extension track of the track shaft 31. In the present application, the support shaft 32 is provided in three, but is not limited to three. In the present application, the three support shafts 32 are inserted and arranged between the four track shafts 31, and the support shaft 32 located in the middle is higher than the two support shafts 32, so that the three support shafts 32 and the four track shafts 31 are arranged in an isosceles triangle as a whole. In order to further reduce the weight of the track arm 3, the support shaft 32 and the track shaft 31 can also adopt a hollow tubular structure.

[0077] The first reinforcing structure 33 is provided along the extension direction of the track arm 3. The first reinforcing structure 33 is formed by a plurality of reinforcing rods fixed between the support shaft 32 and the track shaft 31. The first reinforcing structure 33 can connect the plurality of support shafts 32 and the track shaft 31, limit the distance between them, and ensure the strength of the track arm 3.

[0078] Further, the free end of the track arm 3, i.e. the outer end of the support shaft 32 and the track shaft 31, is also connected with a closing plate 34. The closing plate 34 is used to limit the limit position of the free end of the blade 2, so as to avoid the blade 2 from being separated from the free end of the track arm 3.

[0079] Referring to Figure 1 and Figure 3 In order to realize the connection between the track arm 3 and the main shaft 1, the upper end of the main shaft 1 is coaxially fixed with a bearing ring 4. The outer circumferential surface of the bearing ring 4 is also shaped as a hexagon, so that the circumferential surface of the bearing ring 4 is a vertical surface, and the three track arms 3 are connected to one vertical surface of the bearing ring 4.

[0080] The vertical surface of the bearing ring 4 connected with the track arm 3 is horizontally fixed with two symmetrical support arms 41. The root of the track arm 3 is fixed with an ear plate 35 corresponding to the position of the two support arms 41. The ear plate 35 is pivotally connected with the support arm 41, so as to realize the swing of the track arm 3 relative to the main shaft 1.

[0081] Further, the bearing ring 4 is also provided with a retaining track 42, which is used to guide the free end of the blade 2 to be separated from the track arm 3 in the final stage of folding, so as to ensure the completion of the folding of the track arm 3.

[0082] The retaining rail 42 comprises a plurality of butt sliding shafts 421 adapted to the rail shafts 31. Specifically, a plurality of butt sliding shafts 421 are fixed to the vertical surface of the bearing ring 4 connected with the rail arm 3. The butt sliding shafts 421 correspond to the rail shafts 31 one by one and have the same diameter as the rail shafts 31. When the rail arm 3 swings to the unfolded state, each rail shaft 31 of the rail arm 3 can butt against the butt sliding shaft 421, so that the blade 2 can slide along the rail shaft 31 to the butt sliding shaft 421, ensuring the completion of the folding operation of the blade 2 and avoiding the obstruction of the swinging of the rail arm 3 to the folded state.

[0083] Further, a plurality of limiting columns 422 are fixed to the upper side of the vertical surface of the bearing ring 4 corresponding to each butt sliding shaft 421. The limiting columns 422 are used to abut against the support shafts 32. In the present application, the number of limiting columns 422 is taken as two, but is not limited to two. When the rail arm 3 swings to the unfolded state, the two limiting columns 422 can abut against the support shafts 32 located on both sides of the rail arm 3, further strengthening the limitation of the rail arm 3 in the unfolded state.

[0084] Further, a second reinforcing structure 423 is arranged between the support arm 41, the butt sliding shaft 421 and the limiting column 422 located on the same vertical surface of the bearing ring 4. The second reinforcing structure 423 also comprises a plurality of reinforcing rods, which are used to improve the stability of the support arm 41, the butt sliding shaft 421 and the limiting column 422.

[0085] In order to realize the sliding of the free end of the blade 2 along the rail shaft 31, the free end of the blade 2 is provided with a sliding piece 5 adapted to the rail shaft 31.

[0086] With reference to Figure 2 Specifically, in the present application, the sliding piece 5 comprises a first pulley set 51 located on both sides of the free end of the blade 2 and a second pulley set 52 located in the middle of the free end of the blade 2. The two first pulley sets 51 are adapted to the two rail shafts 31 on the outer side of the rail arm 3. The first pulley set 51 comprises a first pulley frame 511 pivotally connected to the side of the free end of the blade 2. The first pulley frame 511 is rotatably connected with two rows of first guide pulleys 512 arranged symmetrically. The two rows of first guide pulleys 512 are arranged on the upper and lower sides of the rail shaft 31 and can abut against the circumferential surface of the rail shaft 31. The first pulley frame 511 is rotatably provided with a row of first limiting pulleys 513 between the two rows of first guide pulleys 512. The first limiting pulleys 513 are located on the outer side of the rail arm 3 and can abut against the circumferential surface of the rail shaft 31.

[0087] With reference to Figure 2The second pulley set 52 is used to be matched with the two track shafts 31 in the middle of the track arm 3. The second pulley set 52 comprises a second pulley frame 521 which is hingedly connected to the middle of the free end of the blade 2 through a pivot. The second pulley frame 521 is rotatably connected with a row of second guide pulleys 522 on the upper and lower sides corresponding to the two track shafts 31. The second guide pulleys 522 on the upper and lower sides of the track shaft 31 can be in contact with the corresponding track shaft 31. The second pulley frame 521 is rotatably connected with a row of second limiting pulleys 523 between the two track shafts 31. The opposite sides of the second limiting pulleys 523 can be in contact with the two track shafts 31 at the same time.

[0088] When the track arm 3 swings to the unfolded state, the free end of the blade 2 can swing along the track arm 3 through the cooperation of the first pulley set 51, the second pulley set 52 and each track shaft 31.

[0089] Further, the circumferential surface of the first guide pulley 512, the first limiting pulley 513, the second guide pulley 522 and the second limiting pulley 523 is formed with an arc-shaped groove which is matched with the circumferential surface of the track shaft 31 to increase the contact area of the pulley and the track shaft 31 and improve the stability of the blade 2 when swinging.

[0090] In addition, in other schemes of the present application, the first pulley set 51 and the second pulley set 52 in the above-mentioned scheme are directly replaced by a sliding sleeve as the sliding part 5, that is, the sliding sleeve is sleeved on each sliding shaft and is hingedly connected to the free end of the blade 2. The blade 2 can also move along the track arm 3. In fact, the present application does not limit the specific connection structure of the blade 2 and the track arm 3. As long as the free end of the blade 2 can move along the extension track of the track arm 3, it can be applied to the present application as a specific connection scheme to realize the cooperation of the blade 2 and the track arm 3.

[0091] In order to realize the swinging of the blade 2, a blade driving part is further provided in the present application to drive the blade 2 to act. The following will be specifically described:

[0092] Referring to Figure 4 The main shaft 1 is internally horizontally fixed with a bearing plate 12. The bearing plate 12 is fixed with a first roller frame 13. The first roller frame 13 is rotatably connected with three first rollers 131 corresponding to three blades 2. The axes of the three first rollers 131 are vertically arranged. Each first roller 131 is provided with a first traction rope 132. The first traction rope 132 can be directly made of a steel rope or other high-strength flexible materials. One end of the first traction rope 132 is wound and fixed to the first roller 131 in a forward manner. The other end of the first traction rope 132 is wound and fixed to the first roller 131 in a reverse manner. No matter the first roller 131 rotates forward or reversely, the first traction rope 132 always keeps one end tight and the other end synchronous.

[0093] The lower end of the three first rollers 131 is provided with a driving assembly, which can be provided separately for each first roller 131 for driving the first roller 131 to rotate, such as directly driving by a servo motor; or the driving assembly can be provided for the three first rollers 131 together, such as cooperating with chain transmission or gear transmission by a servo motor, that is, the synchronous reciprocating rotation of the three first rollers 131 can be realized.

[0094] Referring to Figure 4 and Figure 5 , the bearing ring 4 is provided with two through holes 43 on the vertical surface corresponding to one side of each blade 2, and each rail arm 3 is fixed with a receiving box 36 at the free end, and the receiving box 36 is rotatably connected with a reversing wheel 361 inside, and the two sides of the receiving box 36 tend to the direction of the main shaft 1 are formed with wire grooves, and the part of the traction rope extending out of one through hole 43 of the bearing ring 4 will continue to enter the receiving box 36 along the wire groove on one side of the receiving box 36, and after winding around the reversing wheel 361, it will be extended out of the receiving box 36 through the wire groove on the other side of the receiving box 36, and finally extended to the main shaft 1 through the other through hole 43 of the bearing ring 4.

[0095] The setting of the receiving box 36 can realize the receiving of the reversing wheel 361, on the other hand, it can protect the reversing wheel 361 and avoid the contact of the blade 2 with the reversing wheel 361 when moving.

[0096] Referring to Figure 5 , further, in order to avoid the friction between the receiving box 36 and the first traction rope 132, the wire groove position of the receiving box 36 is rotatably connected with a wire guide shaft 362, and the wire guide shaft 362 is in the same direction as the axis of the reversing wheel 361, and the first traction rope 132 entering and exiting the receiving box 36 is in contact with the wire guide shaft 362, so as to avoid the friction between the first traction rope 132 and the receiving box 36.

[0097] The free end of the blade 2 is connected with the first traction rope 132, so that the blade 2 moves with the first traction rope 132, and in the specific scheme of the application, the first traction rope 132 is fixed to the second pulley frame 521 of the second pulley group 52, so as to realize that when the first traction rope 132 rotates, the pulley group can be dragged to move along the rail shaft 31, thereby driving the blade 2 to swing.

[0098] Referring to Figure 2 and Figure 6Further, in order to avoid the first traction rope 132 rubbing against the free end of the blade 2 after passing through the reversing wheel 361 on the side of the pulley set not fixed, the free end of the blade 2 is further provided with a wire guide mechanism 21, which includes a wire guide frame 211 fixed to the free end of the blade 2, two first wire rollers 212 and two second wire rollers 213 rotatably connected in the wire guide frame 211, the two first wire rollers 212 and the two second wire rollers 213 are arranged alternately, and the axis direction of the two first wire rollers 212 is perpendicular to the axis direction of the two second wire rollers 213. The first traction rope 132 passes through between the two first wire rollers 212 and between the two second wire rollers 213, and the two first wire rollers 212 and the two second wire rollers 213 can abut against the first traction rope 132.

[0099] In summary, when the blade 2 needs to be unfolded, the first roller 131 rotates to pay out the end of the first traction rope 132 fixed to the pulley set, and the first traction rope 132 drags the pulley set to move along the track shaft 31 away from the main shaft 1, so as to realize the swinging of the free end of the blade 2 to the free end of the track arm 3, at this time the blade 2 is unfolded, and at the same time, the part of the first traction rope 132 passing through the reversing wheel 361 is guided by the wire guide mechanism 21 and then enters the main shaft 1 to continue winding on the first roller 131; when the blade 2 needs to be folded, the first roller 131 rotates in the opposite direction, and the first traction rope 132 drags the pulley set to move along the track shaft 31 towards the main shaft 1, so as to realize the swinging of the free end of the blade 2 from the free end of the track arm 3 to the root of the track arm 3 and into the holding track 42, at this time the blade 2 is in the folded state.

[0100] In addition, in another scheme of the present application, a single roller can be directly used to replace the three first rollers 131 in the above-mentioned scheme, that is, the first traction rope 132 on the three first rollers 131 is wound and fixed on the same roller, at this time, the rotation of the roller can simultaneously drive the three first traction ropes 132 to move, realize the swinging of the blade 2, and ensure the synchronization of the movement of the blade 2.

[0101] Further, in other schemes of the present application, the blade 2 driving mechanism can also be directly replaced, for example, a rack is fixed along the extension direction of the track arm 3, and a gear driven by a motor is arranged at the movable end of the blade 2, the gear is driven to rotate and roll along the rack by the motor, so as to realize the folding of the blade 2. That is, the driving mode of the blade 2 is not limited to the specific scheme described in the present application, and any mechanism that can drive the blade 2 to move back and forth along the track arm 3 can be used as the blade 2 driving mechanism of the present application.

[0102] In order to realize the unfolding and folding of the track arm 3, the present application further provides a track arm driving component for driving the track arm 3 to move, which will be described in detail as follows:

[0103] With reference to Figure 4 The support arm 6 is fixed to the upper side of the bearing ring 4 corresponding to each track arm 3. In this application, the number of support arms 6 is three. Each support arm 6 extends upwardly from the bearing ring 4 as the starting point and is inclined to the horizontal plane. The projection of each support arm 6 coincides with the projection of each track arm 3 in the unfolded state.

[0104] Further, in the application, the support arm 6 adopts a pipe rack structure to reduce the overall weight of the support arm 6 while ensuring the strength of the support arm 6.

[0105] With reference to Figure 7 Further, the first reinforcing frame 61 is horizontally arranged between the lower ends of the three support arms 6. The first reinforcing frame 61 is located above the bearing table and has a triangular pipe rack structure. Each corner of the first reinforcing frame 61 is bolted to one of the support arms 6. The second reinforcing frame 62 is horizontally arranged between the upper ends of the three support arms 6. The second reinforcing frame 62 also has a triangular pipe rack structure. Each corner of the second reinforcing frame 62 is also bolted to one of the support arms 6. In this way, the first reinforcing frame 61 and the second reinforcing frame 62 can further hold and fix the three support arms 6, so that the three support arms 6 are stably fixed to the bearing ring 4.

[0106] With reference to Figure 4 The second roller frame 7 is fixed above the first roller frame 13. The second roller frame 7 is rotatably provided with three second roller cylinders 71 corresponding to the three track arms 3. The axes of the three second roller cylinders 71 are also vertically arranged. Each second roller cylinder 71 is provided with a second traction rope 72. One end of the second traction rope 72 is wound and fixed to the second roller cylinder 71, and the other end is the traction end. The second traction rope 72 can be made of the same material as the first traction rope 132, or it can be made of a different high-strength flexible material.

[0107] The lower ends of the three second roller cylinders 71 are also provided with a driving assembly. The driving assembly can be individually arranged for each second roller cylinder 71, such as a servo motor direct drive. Alternatively, the driving assembly can be arranged for the three second roller cylinders 71 together, such as a servo motor cooperating with chain transmission or gear transmission, that is, the reciprocating rotation of the three second roller cylinders 71 can be achieved.

[0108] With reference to Figure 4 and Figure 7The bottom of each support arm 6 is fixed with a bottom plate 63, the first pulley box 64 is fixed on the bottom plate 63, the first pulley 641 is rotatably arranged in the first pulley box 64, the axis of the first pulley 641 is horizontally arranged, the through slot is formed on the bottom plate 63 corresponding to the fixed position of the first pulley box 64, and the wire outlet is formed on the side of the first pulley box 64 away from the bottom plate 63. The upper end of each support arm 6 is fixed with the second pulley box 65, the side of the second pulley box 65 facing the first pulley box 64 and the side of the second pulley box 65 facing the track arm 3 are both open, the second pulley 651 is rotatably connected to the second pulley box 65, and the axis of the second pulley 651 is the same as that of the first pulley 641.

[0109] Referring to Figure 1 、 Figure 4 and Figure 7 , the traction end of the second traction rope 72 passes through the through slot of the bottom plate 63, passes around the first pulley 641 in the first pulley box 64, extends out of the wire outlet of the first pulley box 64 and enters the second pulley box 65, then the traction end of the second traction rope 72 passes around the second pulley 651 and extends out of the second pulley box 65, and finally is rotatably connected to the upper side of the middle part of the track arm 3 in the extension direction. Of course, the traction end of the second traction rope 72 can also be connected to the upper side of the free end of the track arm 3.

[0110] In summary, when it is necessary to deploy the track arm 3, the second roller 71 rotates forward to wind the second traction rope 72, and the traction end of the second traction rope 72 drives the track arm 3 to swing to make the track arm 3 reach the deployed state; when it is necessary to fold the track arm 3, the second roller 71 reverses to pay out the traction rope, and the weight of the track arm 3 drives the traction end of the traction rope to descend until the free end of the track arm 3 abuts against the outer side of the blade 2, thereby completing the folding operation of the track arm 3. In addition, since the extension distance of the track arm 3 is relatively long, the second traction rope 72 is used to hoist and pull the track arm 3, which can further improve the rigidity and stability of the track arm 3, so that the track arm 3 can more effectively bear the bending stress and improve the load bearing capacity.

[0111] Similarly, in other schemes of the present application, a single roller can be directly used to replace the three second rollers 71 in the above-mentioned scheme, that is, the second traction ropes 72 on the three second rollers 71 are all wound and fixed on the same roller. At this time, the rotation of the roller can simultaneously drive the three second traction ropes 72 to move, realize the swinging of the track arm 3, and ensure the synchronization of the movement of the track arm 3.

[0112] In summary, the implementation principle of the wind catching device in the scheme of the present application is as follows:

[0113] In the operation, first, through each second traction rope 72, the line is taken, and each track arm 3 is swung up to the unfolded state. When the track arm 3 is unfolded, each track shaft 31 of the track arm 3 can be respectively connected with the docking sliding shaft 421. Then, through the first traction rope 132, the line is taken on one side of the blade 2 pulley group, and the line is taken on the other side. The pulley group at the free end of the blade 2 will move to the track shaft 31 of the track arm 3 along the docking sliding shaft 421. Then, with the continuous line of the first traction rope 132, the pulley frame will continue to move along the track shaft 31 to the free end of the track shaft 31. At this time, the blade 2 is fully unfolded and can be used for wind power capture to drive the main shaft 1 to rotate.

[0114] When a strong storm such as a typhoon occurs, first, the line is taken on one side of the first traction rope 132 and the line is taken on the other side of the blade 2 pulley group. The pulley group at the free end of the blade 2 moves to the track shaft 31 of the track arm 3 along the docking sliding shaft 421. At this time, the blade 2 is also folded. Then, the second traction rope 72 is taken, and each track arm 3 swings down by its own gravity until the track arm 3 swings to the outside of each blade 2. The track arm 3 no longer swings, and the folding of each track arm 3 is realized. The impact and load of the wind on the blade 2 are reduced, the damage risk of the wind generator is reduced, and the anti-typhoon ability of the wind power generation device is improved.

[0115] In another scheme of the present application, a wind detection device can be further provided. For example, a detection platform is fixed on the upper end of the main shaft 1, and a wind sensor is installed on the detection platform to detect the wind level in real time and transmit the detected data to the background control system, so that the wind level can be obtained by the operator in real time.

[0116] Further, the background control system can be electrically connected to the driving elements of the blade driving part and the track arm driving part. When the wind level detected by the wind sensor received by the background control system exceeds the threshold value or exceeds the threshold value and remains for a predetermined time, the driving elements of the blade driving part and the track arm driving part are automatically driven to operate, the blade 2 is folded, and the track arm 3 is folded to improve the wind resistance of the vertical axis wind turbine. When the wind level detected by the wind sensor received by the background control system is lower than the threshold value or lower than the threshold value and remains for a predetermined time, the driving elements of the blade driving part and the track arm driving part are automatically driven to operate, the track arm 3 is unfolded, and the blade 2 is unfolded to complete the normal operation of the vertical axis wind turbine.

[0117] In addition, in the scheme of the present application, the track arm 3 is located above the blades 2, and the upper end of the blade 2 can swing along the track arm 3 as a free end, so that the projection of the wind power capturing device is in a V shape when the plurality of blades 2 are in the unfolded state. However, in other schemes of the present application, the plurality of blades 2 can also be placed above the track arm 3, and the upper end of the blade 2 is hinged to the main shaft 1, and the lower end of the blade 2 is a free end.

[0118] At the same time, the track arm 3 is horizontally flipped, and the arc opening of the track arm 3 is arranged upwards, that is, the bending arc of the track arm 3 is kept the same as the arc of the swing track of the lower free end of the blade 2, so that the lower free end of the blade 2 can still swing along the unfolded track arm 3 when the track arm 3 is unfolded.

[0119] In this state, the blade driving component can be placed in the middle of the main shaft 1 corresponding to the lower end of the blade 2.

[0120] The track arm driving component remains unchanged, and the second traction rope 72 is still kept in the state of unwinding for the track arm 3 to fold, and the second traction rope 72 is kept in the state of winding for the track arm 3 to unfold. In addition, the rotation direction of the track arm 3 can also be changed at the same time, that is, the track arm 3 can be rotated upwards to be in the folded state, and the track arm 3 can be swung downwards to be in the unfolded state. At this time, the second traction rope 72 is wound to drive the track arm 3 to fold, and the second traction rope 72 is unwound to drive the track arm 3 to unfold.

[0121] Further, the blade driving component and the track arm driving component can also be directly replaced as a whole or in part by other structures, as long as the switching of the unfolding and folding states of the blade 2 and the track arm 3 can be met.

[0122] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A wind-catching device, characterized in that, include: Main spindle (1); Several blades (2) are symmetrically arranged on the periphery of the main shaft (1). One end of the blade (2) is movably connected to the main shaft (1), and the other end is a free end that can swing toward or away from the main shaft (1) so that the blade (2) can switch between the retracted state and the unfolded state. Several track arms (3) are respectively arranged on the main shaft (1) corresponding to each of the blades (2). One end of the track arm (3) is movably connected to the main shaft (1), and the other end is a free end that can swing toward or away from the main shaft (1) so that the track arm (3) can switch between the retracted state and the extended state. The free end of the blade (2) is adapted to the track arm (3), and the track arm (3) is used to limit the swing trajectory of the free end of the blade (2) after it is unfolded. The track arm (3) is provided with a track shaft (31) along the swing trajectory of the blade (2); Multiple retaining rails (42) are fixed to the main shaft (1) respectively corresponding to each of the rail arms (3), and the retaining rails (42) are adapted to the free end of the blade (2); After the track shaft (31) swings to the unfolded state, it docks with the retaining track (42). The free end of the blade (2) can reciprocate between the track arm (3) and the retaining track (42) in the unfolded state. The reversing wheel (361) is rotatably mounted on the free end of the track arm (3); The first roller (131) is reciprocatingly mounted on the main shaft (1); The first traction rope (132) is wound around the reversing wheel (361), and the two ends of the first traction rope (132) are wound and fixed to the first roller (131) in a forward and reverse manner, respectively. The first traction rope (132) is connected to the free end of the blade (2) and is used to drive the blade (2) to move along the track arm (3). The retaining track (42) is provided with a docking slide shaft (421); The track arm (3) swings to the unfolded state, and the track shaft (31) docks with the docking slide shaft; The free end of the blade (2) is movably connected to a sliding member (5) for fitting with the track shaft (31) and the docking sliding shaft (421).

2. The wind-catching device according to claim 1, characterized in that, Also includes: The second roller (71) is reciprocatingly mounted on the main shaft (1); The second traction rope (72) is fixed at one end to the second roller (71), and the other end of the second traction rope (72) is connected to the middle or end of the track arm (3) to drive the track arm (3) to swing.

3. The wind-catching device according to claim 1, characterized in that: The connection between the blade (2) and the main shaft (1) is located at the lower end of the blade (2), and the upper end of the blade (2) is a free end; The connection between the track arm (3) and the main shaft (1) is located above the blade (2), and the track arm (3) can swing downward and retract to the outside of the blade (2).

4. The wind-catching device according to claim 2, characterized in that, Also includes: A support arm (6), fixed to the main shaft (1), is positioned above the track arm (3), corresponding to the track arm (3). A pulley is rotatably mounted on the upper end of the support arm (6), and the second traction rope (72) passes around the pulley and is connected to the track arm (3).

5. The wind-catching device according to claim 1, characterized in that, Also includes: A wind sensor is installed at the upper end of the main shaft (1) to detect the wind force level; The background control system is used to receive wind force level data detected by wind sensors.

6. The wind-catching device according to claim 5, characterized in that, Also includes: A blade drive component is used to drive the blade (2) to oscillate. The track arm drive component is used to drive the track arm (3) to swing. The background control system is electrically connected to the blade drive component and the rail arm drive component; When the wind force level detected by the wind sensor received by the background control system exceeds the threshold, it can drive the blade drive component and the rail arm drive component to move, causing the blade (2) and the rail arm (3) to retract. When the wind force level detected by the wind sensor is lower than the threshold, the background control system can drive the blade drive component and the rail arm drive component to move, thereby causing the rail arm (3) and the blade (2) to unfold.

7. A vertical axis wind turbine, characterized in that, Includes the wind-catching device according to any one of claims 1-6.

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