A vertical axis wind turbine with foldable storage variable pitch control

Abstract

This invention relates to the field of wind power generation technology and provides a foldable, retractable, pitch-controlled vertical axis wind turbine. It includes a support frame and a generator body mounted on the support frame, and further includes: multiple inflatable blades; a telescopic main shaft mechanism mounted on the support frame and connected to the input end of the generator body; and a variable pitch mechanism connected to the telescopic main shaft mechanism. The inflatable blades are mounted on the variable pitch mechanism, which is used to adjust the spacing between the inflatable blades. The beneficial effects of this invention are: the coordinated operation of the telescopic main shaft mechanism and the variable pitch mechanism allows for adjustment of the spacing between the inflatable blades to control power generation efficiency; furthermore, this design allows the generator to be folded away for easy carrying, making it particularly suitable for outdoor use.

Description

Technical Field

[0001] This invention belongs to the field of wind power generation technology, and in particular relates to a vertical axis wind turbine that can be folded and stored for pitch control. Background Technology

[0002] With the continuous development of the new energy industry, wind power generation has gradually taken up the mantle of the power industry. However, the current large-capacity wind turbines are mainly horizontal axis wind turbines. Horizontal axis wind turbines are inconvenient to carry and have high requirements for wind speed and hydrodynamic design. Therefore, when powering equipment in outdoor environments, photovoltaic modules are mostly used for power generation. However, when the site is in cloudy or rainy weather, the power generation capacity of photovoltaic modules will be greatly affected. Considering outdoor conditions, how to use the simplest and most reliable method to enable people to obtain reliable wind power in outdoor environments to meet their usage needs is the technical problem that the invention aims to solve. Summary of the Invention

[0003] The purpose of this invention is to provide a foldable, retractable, pitch-controlled vertical axis wind turbine, aiming to solve the technical problems existing in the prior art mentioned in the background section.

[0004] The present invention is implemented as follows: a foldable and retractable vertical axis wind turbine with pitch control includes a support frame and a generator body mounted on the support frame, and further includes: Multiple air-filled blades; A telescopic spindle mechanism is installed on the support frame and is connected to the input end of the generator body. A variable pitch mechanism is connected to the telescopic main shaft mechanism, and the inflatable blades are mounted on the variable pitch mechanism. The variable pitch mechanism is used to adjust the spacing between the inflatable blades.

[0005] As a preferred technical solution of the present invention: the variable pitch mechanism includes a plurality of adjusting gears mounted on a telescopic main shaft mechanism via bearings. The adjusting gears are provided with a plurality of arc-shaped grooves. The telescopic main shaft mechanism is also fixed with a plurality of fixed frames. Each fixed frame is provided with a blade mounting piece that forms a sliding fit with it. The blade mounting piece is fixed with a slider that forms a sliding fit with the arc-shaped groove. The blade mounting piece is used to install inflatable blades. The adjusting gears are driven to rotate by a power component.

[0006] As another preferred technical solution of the present invention: the power component includes a pitch motor and a telescopic drive shaft connected to the output end of the pitch motor. A drive gear is installed on the telescopic drive shaft at the position corresponding to each of the adjusting gears, and the drive gear meshes with the adjusting gear for transmission.

[0007] As another preferred technical solution of the present invention: the inflatable blade includes a blade body, the blade body is a lifting airfoil structure made of a tough material, and the blade body is provided with an air nozzle for inflation and deflation.

[0008] As another preferred technical solution of the present invention: the telescopic spindle mechanism includes a hollow first tube, a second tube and a third tube that are sleeved together in sequence. An active telescopic component is installed between the first tube and the second tube, and a driven telescopic component that is linked to the active telescopic component via a rope is installed between the second tube and the third tube. The end of the rope is connected to a winding motor.

[0009] As another preferred technical solution of the present invention: the active telescopic assembly includes a climbing wheel set and a synchronous wheel set. The climbing wheel set is installed at the end of the second tube body via a mounting frame. The wheel surface of each climbing wheel in the climbing wheel set is in contact with the inner wall surface of the first tube body. The end of the second tube body is provided with a clearance groove for the climbing wheel. A pair of rotating wheels are also installed in the mounting frame. The synchronous wheel set includes two synchronous wheels. One synchronous wheel is installed on the mounting frame and its wheel surface is in contact with the inner wall surface of the first tube body. The other synchronous wheel is installed outside the first tube body and its wheel surface is in contact with the outer wall surface of the second tube body. The rope passes through the two synchronous wheels in sequence from the outside and is connected to the driven telescopic assembly via the rotating wheel.

[0010] As another preferred technical solution of the present invention: the active telescopic component further includes a guide wheel assembly, the guide wheel assembly is connected and encapsulated in a protective sleeve, the protective sleeve is fixedly connected to the end face of the first tube body, the wheel surface of each guide wheel in the guide wheel assembly is in contact with the outer wall surface of the second tube body, and the first tube body is provided with a clearance groove for the guide wheel.

[0011] As another preferred technical solution of the present invention: the structure of the driven telescopic component is the same as that of the active telescopic component, except that it does not contain a rotating wheel and its synchronous wheel set is installed in the protective sleeve. The end of the rope is directly wound onto the synchronous wheel set. One of the synchronous wheels in the synchronous wheel set is provided with a coil spring, which is used to store energy when the telescopic main shaft mechanism retracts and release energy when it extends.

[0012] As another preferred technical solution of the present invention: both the synchronous pulley and the rotating pulley are provided with grooves on their wheel surfaces to allow room for the rope.

[0013] As another preferred technical solution of the present invention: the telescopic spindle mechanism further includes a limiting part for limiting the movement stroke of the telescopic spindle mechanism.

[0014] The beneficial effects of this invention are as follows: the coordinated operation of the telescopic main shaft mechanism and the variable pitch mechanism can adjust the spacing of the inflatable blades to control the power generation efficiency. In addition, this form allows the generator to be stored in its entirety, making it convenient to carry and especially suitable for use in outdoor environments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a vertical axis wind turbine generator with foldable pitch control, provided by an embodiment of the present invention. Figure 2 This is a schematic diagram of the variable pitch mechanism provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the telescopic spindle mechanism provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the active telescopic component provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the active telescopic component from another perspective provided in an embodiment of the present invention; Figure 6 A schematic diagram of the telescopic spindle mechanism from another perspective provided in an embodiment of the present invention (the first tube, the second tube, and the third tube are not shown). Figure 7 This is a schematic diagram of the telescopic spindle mechanism from another perspective, as provided in an embodiment of the present invention.

[0016] In the diagram: 100-Support frame, 200-Generator body, 300-Inflatable blade, 400-Variable pitch mechanism, 401-Pitch motor, 402-Blade mounting plate, 403-Adjusting gear, 404-Arc groove, 405-Fixed frame, 406-Telescopic drive shaft, 407-Drive gear, 500-Telescopic main shaft mechanism, 501-1-First tube, 501-2-Second tube, 501-3-Third tube, 502-Protective sleeve, 503-Rope, 504-Guide wheel assembly, 505-Climbing wheel assembly, 506-Synchronous wheel assembly, 507-Rotating wheel, 508-Motor mounting plate. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various elements, but unless otherwise stated, these elements are not limited by these terms. These terms are used only to distinguish one element from another.

[0019] like Figures 1-6 As shown, in one embodiment, a vertical axis wind turbine with foldable pitch control is proposed, including a support frame 100 and a generator body 200 mounted on the support frame 100, and further including: 300 inflatable blades, in multiple quantities; The telescopic spindle mechanism 500 is installed on the support frame 100 and is connected to the input end of the generator body 200. A variable pitch mechanism 400 is connected to the telescopic main shaft mechanism 500, and the inflatable blades 300 are mounted on the variable pitch mechanism 400. The variable pitch mechanism 400 is used to adjust the spacing between the inflatable blades.

[0020] In practical application, the telescopic main shaft mechanism 500 is activated, causing the variable pitch mechanism 400 to unfold according to the set requirements. After adjusting the spacing of the inflatable blades 300 to meet the usage requirements, the inflatable blades 300 are inflated. Then, the telescopic main shaft mechanism 500 is connected to the input end or main shaft of the generator body 200 via a coupling. The same principle applies to storage, and will not be described in detail here.

[0021] like Figure 2 As shown, in a preferred embodiment of the present invention, the variable pitch mechanism 400 includes a plurality of adjusting gear discs 403 mounted on a telescopic main shaft mechanism 500 via bearings. The adjusting gear discs 403 are provided with a plurality of arc-shaped grooves 404. The telescopic main shaft mechanism 500 is also fixed with a plurality of fixing frames 405. Each fixing frame 405 is provided with a blade mounting piece 402 that forms a sliding engagement with it. The blade mounting piece 402 is fixed with a slider that forms a sliding engagement with the arc-shaped groove 404. The blade mounting piece 402 is used to install an inflatable blade 300. The adjusting gear discs 403 are driven to rotate by a power component.

[0022] In practical application, the power component drives the adjusting gear 403 to rotate. Due to the action of the adjusting gear 403, the slider drives the blade mounting piece 402 to move away from or closer to the center of the adjusting gear 403, thereby increasing or decreasing the distance between the blade mounting pieces 402, which serve as the mounting carrier for the inflatable blade 300, so as to achieve the adjustment of the blade pitch.

[0023] Since vertical axis wind turbines are lift-type generators, they are prone to stall. In this embodiment of the invention, when the wind turbine speed exceeds the set wind speed, the variable pitch mechanism 400 can control the inflatable blades to begin retracting at a certain angle to suppress the wind speed. At this time, the wind force is less affected, and the generator speed is lower, thereby achieving the function of power control.

[0024] like Figure 2 As shown, in another preferred embodiment of the present invention, the power assembly includes a pitch motor 401 and a telescopic drive shaft 406 connected to the output end of the pitch motor 401. A drive gear 407 is installed on the telescopic drive shaft 406 at a position corresponding to each of the adjusting gear disks 403, and the drive gear 407 meshes with the adjusting gear disks 403 for transmission.

[0025] This embodiment of the invention provides a specific driving method for the adjusting gear 403. In practical applications, the pitch motor 401 is powered on and outputs power to drive the drive gear 407. Through the meshing action between the teeth, the rotation of the adjusting gear 403 is achieved. Of course, other driving methods can also be used, which will not be described in detail here.

[0026] In practical applications, the power supply of the pitch motor 401 can be set at the position of the generator body 200. A certain magnetic attraction can be provided between the drive gear 407 and the adjusting gear 403 so that when the telescopic drive shaft 406 extends and retracts, the meshing state between the two can be guaranteed, and the problem of meshing failure can be avoided.

[0027] like Figure 1 As shown, in another preferred embodiment of the present invention, the inflatable blade 300 includes a blade body, which is a lifting airfoil structure made of a tough material, and the blade body is provided with an air nozzle for inflation and deflation.

[0028] In this embodiment of the invention, the inflatable blade 300 can be bolted to the blade mounting plate 402. In actual application, the blade body is inflated through the air nozzle. When the internal pressure reaches 0.2 MPa or above, it can be used. After use, the air needle is inserted into the air nozzle to release the air.

[0029] Preferably, the toughening material can be a fiber-reinforced polymer matrix composite material, etc., which will not be described in detail here.

[0030] like Figures 3-7As shown, in another preferred embodiment of the present invention, the telescopic spindle mechanism 500 includes a hollow first tube 501-1, a second tube 501-2, and a third tube 501-3 that are sequentially sleeved together. An active telescopic component is installed between the first tube 501-1 and the second tube 501-2. A driven telescopic component that is linked to the active telescopic component via a rope 503 is installed between the second tube 501-2 and the third tube 501-3. The end of the rope 503 is connected to a winding motor (not shown), and the winding motor can be fixed on a motor mounting plate 509.

[0031] Of course, in this embodiment of the invention, a gap is reserved between the walls of the first tube 501-1, the second tube 501-2 and the third tube 501-3 to facilitate the installation of related components.

[0032] In one embodiment of the present invention, only the form of having three tube segments, namely the first tube 501-1, the second tube 501-2, and the third tube 501-3, is listed. In actual application, the number of tube segments can be two or more, depending on the usage requirements, and no specific limitation is made here.

[0033] Specifically, the active telescopic assembly includes a climbing wheel set 505 and a synchronous wheel set 506. The climbing wheel set 505 is mounted on the end of the second tube 501-2 via a mounting bracket 508. The wheel surface of each climbing wheel in the climbing wheel set 505 is in contact with the inner wall surface of the first tube 501-1. The end of the second tube 501-2 is provided with a clearance groove for the climbing wheel. A pair of rotating wheels 507 are also installed in the mounting bracket 508. The synchronous wheel set 506 includes two synchronous wheels. One synchronous wheel is mounted on the mounting bracket 508 and its wheel surface is in contact with the inner wall surface of the first tube 501-1. The other synchronous wheel is mounted on the outside of the first tube 501-1 and its wheel surface is in contact with the outer wall surface of the second tube 501-2. The rope 503 passes through the two synchronous wheels in sequence from the outside and is connected to the driven telescopic assembly via the rotating wheel 507.

[0034] like Figures 3-6 As shown, in another preferred embodiment of the present invention, the driven telescopic assembly has the same structural composition as the active telescopic assembly, except that it does not contain a rotating wheel 507 and its synchronous wheel set 506 is installed inside the protective sleeve 502 with its wheel surface in contact with the outer wall surface of the third tube 501-3. The end of the rope 503 is directly wound onto the synchronous wheel set 506. One of the synchronous wheels in the synchronous wheel set 506 is equipped with a coil spring for storing energy when the telescopic main shaft mechanism retracts and releasing energy when it extends. The protective sleeve 502 in the driven telescopic assembly is located on the other end of the second tube 501-2, and a guide wheel set 504 is also provided inside it.

[0035] In practical applications, the embodiments of the present invention are as follows: The winding motor outputs power to wind up the rope 503. At this time, the winding of the rope 503 drives the synchronous pulley set 506 and the rotating wheel 507 to rotate. Since the two synchronous pulleys in the synchronous pulley set 506 are in contact with the walls of the first tube 501-1 and the second tube 501-2 respectively, the second tube 501-2 will move towards the first tube 501-1 to achieve contraction. The same applies to the driven telescopic component. The synchronous pulley set 506 at the driven telescopic component is in the unwinding state at this time. When rotating, since it is in contact with the outer wall of the third tube 501-3, the third tube 501-3 will be drawn towards the second tube 501-2 under the action of friction. At this time, the coil spring in one of the synchronous pulleys in the synchronous pulley set 506 stores energy until it stops at the minimum stroke (which can be understood as the two protective sleeves 502 being in contact and mutually resisting to form a limit). This is the process when the telescopic spindle mechanism retracts. The principle is the same when the telescopic spindle mechanism extends, but at this time the winding motor is unwinding outwards. Since the telescopic spindle mechanism is linked by rope 503, and rope 503 itself has no rigidity, the coil spring will release energy at this time. The coil spring releases energy to wind rope 503, and the winding motor reverses to unwind synchronously.

[0036] like Figures 3-7 As shown, in another preferred embodiment of the present invention, the active telescopic component further includes a guide wheel assembly 504, which is connected to and encapsulated in a protective sleeve 502. The protective sleeve 502 is fixedly connected to the end face of the first tube 501-1. The wheel surface of each guide wheel in the guide wheel assembly 504 is in contact with the outer wall surface of the second tube 501-2. The first tube 501-1 is provided with a clearance groove for the guide wheel.

[0037] like Figure 4 As shown, in another preferred embodiment of the present invention, both the synchronous pulley and the rotating pulley 507 have grooves on their surfaces to allow room for the rope 503.

[0038] In another preferred embodiment of the present invention, the telescopic spindle mechanism 500 further includes a limiting part for limiting the travel of the telescopic spindle mechanism 500.

[0039] In this embodiment of the invention, when the telescopic spindle mechanism 500 reaches its maximum or minimum stroke, the limiting part can perform a limiting function. In one embodiment of the invention, the limiting part can be in the form of a limiting protrusion, a limiting screw, etc., and is not specifically limited. The limiting part can act on various objects. For example, a limiting part can be set on the first tube 501-1 to restrict the movement of the second tube 501-2. Here, it mainly restricts its extension stroke because during the retraction stroke, the two protective sleeves 502 will naturally interfere to limit the movement.

[0040] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A foldable, retractable vertical axis wind turbine generator with pitch control, comprising a support frame (100) and a generator body (200) mounted on the support frame (100), characterized in that, Also includes: Inflatable blades (300), in multiple quantities; A telescopic spindle mechanism (500) is installed on the support frame (100), and the telescopic spindle mechanism (500) is connected to the input end of the generator body (200); A variable pitch mechanism (400) is connected to the telescopic main shaft mechanism (500), and the inflatable blades (300) are mounted on the variable pitch mechanism (400). The variable pitch mechanism (400) is used to adjust the spacing between the inflatable blades (300).

2. The foldable, retractable pitch-controlled vertical axis wind turbine generator according to claim 1, characterized in that, The variable pitch mechanism (400) includes several adjusting gears (403) mounted on the telescopic spindle mechanism (500) via bearings. Several arc-shaped grooves (404) are provided on the adjusting gears (403). Several fixing frames (405) are also fixed on the telescopic spindle mechanism (500). Each fixing frame (405) is provided with a blade mounting piece (402) that forms a sliding fit with it. A slider that forms a sliding fit with the arc-shaped groove (404) is fixed on the blade mounting piece (402). The blade mounting piece (402) is used to install inflatable blades (300). The adjusting gears (403) are driven to rotate by a power component.

3. The foldable, retractable pitch-controlled vertical axis wind turbine generator according to claim 2, characterized in that, The power assembly includes a pitch motor (401) and a telescopic drive shaft (406) connected to the output end of the pitch motor (401). A drive gear (407) is installed on the telescopic drive shaft (406) at the position corresponding to each of the adjusting gears (403). The drive gear (407) meshes with the adjusting gear (403) for transmission.

4. The foldable, retractable pitch-controlled vertical axis wind turbine generator according to claim 1, 2, or 3, characterized in that, The inflatable blade (300) includes a blade body, which is a lifting airfoil structure made of a tough material, and the blade body is provided with an air nozzle for inflation and deflation.

5. The foldable, retractable pitch-controlled vertical axis wind turbine generator according to claim 4, characterized in that, The telescopic spindle mechanism (500) includes a hollow first tube (501-1), a second tube (501-2), and a third tube (501-3) that are sequentially sleeved together. An active telescopic component is installed between the first tube (501-1) and the second tube (501-2). A driven telescopic component that is linked to the active telescopic component via a rope (503) is installed between the second tube (501-2) and the third tube (501-3). The end of the rope (503) is connected to a winding motor.

6. The foldable, retractable pitch-controlled vertical axis wind turbine generator according to claim 5, characterized in that, The active telescopic assembly includes a climbing wheel assembly (505) and a synchronous wheel assembly (506). The climbing wheel assembly (505) is mounted on the end of the second tube (501-2) via a mounting bracket (508). The wheel surface of each climbing wheel in the climbing wheel assembly (505) is in contact with the inner wall surface of the first tube (501-1). The end of the second tube (501-2) is provided with a clearance groove for the climbing wheels. A pair of rotating wheels (507) are also installed in the mounting bracket (508). The synchronous pulley assembly (506) includes two synchronous pulleys. One of the synchronous pulleys is mounted on the mounting bracket (508) and its wheel surface is in contact with the inner wall surface of the first tube (501-1). The other synchronous pulley is mounted outside the first tube (501-1) and its wheel surface is in contact with the outer wall surface of the second tube (501-2). The rope (503) passes through the two synchronous pulleys in sequence from the outside and is connected to the driven telescopic assembly via the rotating wheel (507).

7. The foldable, retractable pitch-controlled vertical axis wind turbine generator according to claim 6, characterized in that, The active telescopic assembly also includes a guide wheel assembly (504), which is connected to and encapsulated in a protective sleeve (502). The protective sleeve (502) is fixedly connected to the end face of the first tube (501-1). The wheel surface of each guide wheel in the guide wheel assembly (504) is in contact with the outer wall surface of the second tube (501-2). The first tube (501-1) is provided with a clearance groove for the guide wheel.

8. The foldable, retractable pitch-controlled vertical axis wind turbine generator according to claim 7, characterized in that, The structure of the driven telescopic assembly is the same as that of the active telescopic assembly, except that it does not contain a rotating wheel (507) and its synchronous wheel set (506) is installed inside the protective sleeve (502). The end of the rope (503) is directly wound onto the synchronous wheel set (506). One of the synchronous wheels in the synchronous wheel set (506) is equipped with a coil spring, which is used to store energy when the telescopic main shaft mechanism retracts and to release energy when it extends.

9. The foldable, retractable pitch-controlled vertical axis wind turbine generator according to claim 6, characterized in that, The synchronous pulley and the rotating pulley (507) are both provided with grooves on their surfaces to allow the rope (503) to be properly positioned.

10. The foldable, retractable pitch-controlled vertical axis wind turbine generator according to claim 7, characterized in that, The telescopic spindle mechanism (500) also includes a limiting part for limiting the travel of the telescopic spindle mechanism (500).

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