Blade-distributed biconical vertical shaft folding portable wind power generation device with elastic inhaul cables

Abstract

The invention provides a blade-distributed biconical vertical shaft folding portable wind power generation device with an elastic inhaul cable, which comprises a wind turbine, and the wind turbine comprises a square telescopic rod, a blade sliding connection bracket sleeved in the middle of the square telescopic rod, and blade fixed connection upper and lower brackets fixed at the upper and lower ends of the square telescopic rod, the head end of the elastic steel wire framework is rotatably connected to the blade sliding connection support, the upper end and the lower end of the blade inhaul cable are fixedly connected to the blade fixing connection upper and lower supports, and the middle point of the blade inhaul cable is connected with the tail end of the elastic steel wire framework. The blade tensioning elastic inhaul cable is used for elastically connecting the upper and lower vertexes of the conical blade to the upper and lower blade fixedly-connected supports, the permanent magnet generator is fixed to the lower end of the square telescopic rod through a wind turbine motor coupler, and the fan vertex anti-inclination assembly is fixed to the top of the upper blade fixedly-connected support. One end of the windproof rope is connected with the fan vertex anti-inclination assembly, and the other end is connected with a ground plug. The device is portable and can stably change energy.

Description

Technical Field

[0001] The invention relates to the technical field of renewable energy power generation, and in particular to a double-conical vertical-axis foldable portable wind power generation device with elastic cables and cloth blades. Background Art

[0002] Portable wind power generation is a clean and pollution-free new energy utilization method that uses portable wind turbines to collect wind energy and generate electricity. It is an important supplement to large and medium-sized wind power generation. It is of great significance to ensure the daily lighting, emergency rescue, wireless communication, etc. of polar scientific expeditions, field geological exploration personnel, border guards, etc. who are in the field for a long time and often move. However, most of the current portable horizontal axis or vertical axis wind turbines are assembled structures, that is, the wind turbines are generally composed of rigid blades and other parts. When the wind turbine needs to be stored, the rigid blades and the like are first disassembled into several parts, and then placed in the designated position of the customized storage box; when the wind turbine needs to be unfolded and generate electricity, the storage box needs to be opened, and the parts need to be taken out, installed, and fixed in turn. The rigid blades of this assembled portable wind turbine are long, wide, and heavy, which is particularly inconvenient for individuals to carry, install, and disassemble on site.

[0003] The invention patent application with publication number CN114704432A discloses a portable vertical axis wind turbine with foldable cloth blades, including a limitable telescopic sail pole, a sail bone, a sail, a generator and a battery. The sail is made of polyester cloth and is held open by the sail bone. However, the inventor of this application has found through research that since the blades of the portable wind turbine are made of polyester cloth, which is basically inelastic, and the properties of the two steel wire skeletons above and below each blade generally have certain differences, this will inevitably lead to inconsistent pulling force on the blades from each vertex when the wind wheel (the whole combination of the wind turbine blades and the hub, which can be understood as the rotating part of the prime mover) is fully unfolded, causing the cloth blades to wrinkle and deform, seriously reducing the efficiency of the blades in collecting wind energy. In fact, when each blade is unfolded, there will always be differences in elasticity, texture and other aspects, and wave-like undulating concave and convex wrinkles will appear. These wrinkles can be seen from the photos of the physical models of the corresponding papers of the research group that applied for the present invention, such as Figure 2 .7, 5.2, 5.3, and 5.6 (Li Jinrong. Design and Performance Research of Portable Vertical Axis Wind Turbine [D]. Chongqing University of Technology, 2024. DOI: 10.27753 / d.cnki.gcqgx.2024.000057.), even during operation, the formation of turbulence leads to uneven and irregular distribution of wind speed in space and produces unexpected wrinkles. The appearance of wrinkles may greatly reduce the smoothness of the blade surface, seriously reducing the stability and effective collection of wind energy by the wind wheel.

[0004] Therefore, targeted design is needed to make the designed blades smoother to improve the stability and efficiency of energy conversion. Summary of the invention

[0005] Aiming at the technical problem that the existing cloth blades with vertical axes are very prone to wrinkles and unevenness, which seriously reduces the stability and effective collection of wind energy by the wind wheel, the present invention provides a double-conical vertical-axis foldable portable wind power generation device with elastic cables and cloth blades.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A double-conical vertical axis foldable portable wind power generation device with cloth blades and elastic cables, comprising a wind turbine, a wind turbine motor coupling, a permanent magnet generator, a wind turbine vertex anti-tilt assembly, a windproof rope and a ground plug; wherein,

[0008] The wind turbine comprises a square telescopic rod, a blade sliding connection bracket, a blade fixed connection upper bracket, a blade fixed connection lower bracket, an elastic steel wire skeleton, a blade cable, a cloth blade and a blade tensioning elastic cable. The square telescopic rod is composed of a plurality of metal hollow square tubes that are tightly nested and matched with each other, and an elastic movable locking pin is used between two adjacent metal hollow square tubes to perform telescopic locking and positioning; the blade sliding connection bracket is sleeved in the middle of the square telescopic rod and can slide freely up and down in the middle section of the square telescopic rod but cannot rotate; the blade fixed connection upper bracket is fixedly sleeved on the upper end of the square telescopic rod, and the blade fixed connection lower bracket is fixedly sleeved on the lower end of the square telescopic rod, and the outer edges of the blade fixed connection upper bracket and the blade fixed connection lower bracket are radially and evenly provided with a plurality of blade cable connection holes and blade vertex connection holes; the elastic steel wire skeleton The head end is rotatably connected to the blade sliding connection bracket; the upper end of the blade cable is fixedly connected to the blade cable connection hole of the blade fixed connection upper bracket, the lower end of the blade cable is fixedly connected to the blade cable connection hole of the blade fixed connection lower bracket, and the midpoint of the blade cable is connected to the tail end of the elastic steel wire skeleton; there are multiple cloth blades, each of which is formed by two pieces of umbrella cloth that are approximately fan-shaped and symmetrically sewn together on the arc edge to form a conical blade, and the upper and lower outer bevel edges of the conical blade are wrapped to form a cloth sleeve, and the blade cable is inserted into the cloth sleeve, and the inner surface of the arc-shaped curved outer drum part in the middle of the conical blade is supported by the elastic steel wire skeleton; the blade tensioning elastic cable elastically connects the upper vertex of the conical blade to the blade vertex connection hole of the blade fixed connection upper bracket and the lower vertex to the blade vertex connection hole of the blade fixed connection lower bracket;

[0009] The main shaft of the permanent magnet generator is inserted into the hollow inner side of the lower end of the square telescopic rod and fixedly connected through the wind turbine motor coupling. The permanent magnet generator is also embedded with a current conversion circuit that outputs a stable voltage.

[0010] The fan apex anti-tilt assembly is fixedly arranged on the top of the bracket fixedly connected to the blade so that the apex of the square telescopic rod is limited in the horizontal direction to prevent the fan from tipping over but can still rotate smoothly. There are several wind-proof ropes and ground plugs, one end of the wind-proof rope is connected to the fan apex anti-tilt assembly, and the other end is connected to the ground plug.

[0011] Compared with the prior art, the double-conical vertical-axis folding portable wind power generation device with cloth blades and elastic cables provided by the present invention has a single elastic steel wire frame and a blade cable for each cloth blade frame and closely cooperates with the two, thereby reducing the unfavorable conditions of uneven blade flatness and wrinkles caused by inconsistent performance of the existing two or more steel wire frames. In addition, the upper and lower vertices of the cloth blades are pre-stretched by the blade tensioning elastic cables, so that the surface of each cloth blade is smooth and wrinkle-free after unfolding, thereby improving the stability of the force and shape of the blades during operation; and the blade tensioning elastic cables are used to tension the umbrella cloth blades on the blades of the retractable wind turbine, which are fixedly connected to the upper and lower brackets and the elastic steel wire frame, further ensuring the roundness and smoothness of the cloth blade surface, and can stably and efficiently intercept wind energy, thereby ensuring that the blades have a high energy conversion efficiency, and are particularly suitable for emergency power supply operations for frequently moving personnel in remote areas with relatively disordered wind resources.

[0012] Furthermore, the square telescopic rod is composed of 3 to 4 sections of stainless steel or high-hardness aluminum alloy hollow 4-square or 6-square tubes that are tightly nested with each other. The total length after stretching is 1 to 1.5 meters. Each section of the square tube is 15 to 30 mm thick, 0.8 to 1.5 mm thick, and 300 to 500 mm long.

[0013] Furthermore, the blade sliding connection bracket is provided with an inner square hole in the middle which is sleeved with the square telescopic rod, a plurality of steel wire frame limiting grooves are radially provided on the outer edge, and a steel wire frame rotation axis hole which passes through the steel wire frame limiting groove is provided on the side wall, and a skeleton rotation connection hole is provided at the head end of the elastic steel wire frame, and the side of the elastic steel wire frame with the skeleton rotation connection hole is inserted into the steel wire frame limiting groove and aligned, and bolts are inserted into the steel wire frame rotation axis hole and the skeleton rotation connection hole for connection.

[0014] Furthermore, a blade midpoint connecting hole is provided on the elastic steel wire skeleton near the head end, and a blade cable connecting hole is provided at the tail end of the elastic steel wire skeleton. The inner middle point of the conical blade is connected to the blade midpoint connecting hole by a blade tensioning elastic cable, the midpoint of the blade cable is socketed with the blade cable connecting hole, and the inner middle arc apex of the conical blade is also connected to the blade cable connecting hole by a blade tensioning elastic cable.

[0015] Furthermore, the elastic steel wire skeleton is made of high-elastic stainless steel wire or high-spring steel wire with a diameter of 2.5 to 3.0 mm and a length of 30 to 50 cm.

[0016] Furthermore, the blade cable is made of a nylon rope with a thickness of 2.5 to 3.5 mm, or a stainless steel rope with a thickness of 1.5 to 2 mm.

[0017] Furthermore, there are three cloth blades.

[0018] Furthermore, the blade tensioning elastic cable is made of high-elastic nylon fabric or tension spring.

[0019] Furthermore, the fan vertex anti-tilt assembly includes a fan vertex anti-tilt bracket, an anti-tilt connecting support, a rolling bearing, an isolation pad and a connecting bolt. The fan vertex anti-tilt bracket is provided with a threaded hole in the middle and vertex bracket holes connected to one end of the wind-proof rope are radially and evenly arranged on the outer edge. The anti-tilt connecting support is inserted into the hollow inner side of the upper end of the square telescopic rod and fixedly sleeved. The anti-tilt connecting support is provided with a mounting hole in the middle. Two rolling bearings are symmetrically fixedly nested in the mounting hole. Isolation pads are fixedly nested at the outer ends of the two rolling bearings. The screw of the connecting bolt is inserted into the threaded hole and the vertex bracket hole, passes through the rolling bearing and the isolation pad, and then extends out of the mounting hole and is locked with a nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a schematic diagram of the unfolded structure of a double-conical vertical-axis foldable portable wind power generation device with elastic cables and cloth blades provided by the present invention.

[0021] Figure 2 yes Figure 1 The schematic diagram of the structure after the cloth blades are omitted.

[0022] Figure 3 yes Figure 2 The schematic diagram of the structure after the windproof rope and ground plug are omitted.

[0023] Figure 4 yes Figure 1 Schematic diagram of the hemming structure of the middle half of the cloth blade when unfolded in a flat shape.

[0024] Figure 5 yes Figure 1 Schematic diagram of the structure of the middle blade sliding connection bracket.

[0025] Figure 6 yes Figure 1 Schematic diagram of the structure of the medium elastic steel wire skeleton.

[0026] Figure 7 yes Figure 1 Schematic diagram of the explosion structure of the top anti-tilt assembly of the medium-sized wind turbine.

[0027] In the figure, 1, wind turbine; 11, square telescopic rod; 12, blade sliding connection bracket; 121, inner square hole; 122, steel wire frame limit groove; 123, steel wire frame rotation axis hole; 13, blade fixed connection upper bracket; 14, blade fixed connection lower bracket; 141, blade cable connection hole; 142, blade vertex connection hole; 15, elastic steel wire frame; 151, frame rotation connection hole; 152, blade midpoint connection hole; 153, blade pull Cable connection hole; 16, blade cable; 17, cloth blade; 18, blade tensioning elastic cable; 19, elastic movable locking pin; 2, wind turbine motor coupling; 3, permanent magnet generator; 4, wind turbine vertex anti-tilt assembly; 41, wind turbine vertex anti-tilt bracket; 411, threaded hole; 412, vertex bracket hole; 42, anti-tilt connecting support; 421, mounting hole; 43, rolling bearing; 44, isolation pad; 45, connecting bolt; 5, windproof rope; 6, ground plug. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific diagrams.

[0029] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0030] 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.

[0031] Please refer to Figures 1 to 4 As shown, the present invention provides a double-conical vertical-axis foldable portable wind power generation device with elastic cables, comprising a wind turbine 1, a wind turbine motor coupling 2, a permanent magnet generator 3, a wind turbine vertex anti-tilt assembly 4, a windproof rope 5 and a ground plug 6; wherein,

[0032] The wind turbine 1 comprises a square telescopic rod 11, a blade sliding connection bracket 12, a blade fixed connection upper bracket 13, a blade fixed connection lower bracket 14, an elastic steel wire skeleton 15, a blade cable 16, a blade cloth 17 and a blade tensioning elastic cable 18. The square telescopic rod 11 is composed of a plurality of metal hollow square tubes that are closely nested and matched with each other, and an elastic movable locking pin 19 is used between two adjacent metal hollow square tubes for telescopic locking and positioning; the blade sliding connection bracket 12 is sleeved in the middle of the square telescopic rod 11, and can slide freely up and down in the middle section of the square telescopic rod 11 but cannot rotate; the blade fixed connection upper bracket 13 is fixedly sleeved on the upper end of the square telescopic rod 11 The blade fixed connection lower bracket 14 is fixedly sleeved on the lower end of the square telescopic rod 11, that is, the respective preset inner holes of the blade fixed connection upper bracket 13 and the blade fixed connection lower bracket 14 are respectively fixedly connected to the outer edges of each pipe section of the square telescopic rod 11, and the outer edges of the blade fixed connection upper bracket 13 and the blade fixed connection lower bracket 14 are radially and evenly provided with a plurality of blade cable connection holes 141 and blade vertex connection holes 142, so as to fix the end points of the blade cables 16 and fix the vertex A of each blade 17. The material of the two blade fixed connection brackets is high-strength plastic or aluminum, iron, stainless steel, etc.; the head end of the elastic steel wire skeleton 15 can be rotatably connected to the blade sliding connection The upper end of the blade cable 16 is fixedly connected to the blade cable connection hole 141 of the blade fixed connection upper bracket 13, and the lower end of the blade cable 16 is fixedly connected to the blade cable connection hole 141 of the blade fixed connection lower bracket 14. The midpoint of the blade cable 16 is connected to the tail end of the elastic steel wire skeleton 15; there are multiple cloth blades 17, and each cloth blade 17 is formed by two pieces of umbrella cloth in a fan shape (to ensure the tapered shape of the cloth blade after the grey cloth is cut and sewn) symmetrically sewn on the upper and lower arc sides C to form a tapered blade, and the upper and lower outer oblique edges of the tapered blade are hemmed (oblique hemming Y) to form a cloth sleeve, and the blade cable 16 is inserted into the cloth sleeve to The blades can be appropriately limited, pulled, and tensioned to strengthen the pulling force on the windward edge of the blades, reduce the vortex street interference caused by cutting the airflow during rotation, and maintain the operation stability and energy conversion efficiency of the wind turbine. The vertical edge Z of the blades can also be repeatedly edged to strengthen the tensile strength of the edge. The inner surface of the arc-shaped curved outer drum part in the middle of the conical blade is supported by an elastic steel wire skeleton 15; the blade tensioning elastic cable 18 elastically connects the upper vertex A of the conical blade to the blade vertex connection hole 142 of the blade fixedly connected to the upper bracket 13 and the lower vertex A to the blade vertex connection hole 142 of the blade fixedly connected to the lower bracket 14, so as to fix each vertex A of each blade 17;

[0033] The main shaft of the permanent magnet generator 3 is inserted into the hollow inner side of the lower end of the square telescopic rod (wind turbine main shaft small tube) 11 and is fixedly connected through the wind turbine motor coupling 2, so that when the wind turbine 1 rotates, the generator main shaft is driven to rotate synchronously to generate electricity. The permanent magnet generator 3 is also embedded with a converter circuit that outputs a stable voltage. The specific generator is preferably implemented by an existing multi-pole permanent magnet high-voltage motor with a thick and long main shaft to reduce the risk of bending and deformation of the motor main shaft, and reduce the adverse effect of the generator output voltage being too low to drive the converter circuit when the wind turbine 1 rotates at a low speed;

[0034] The wind turbine vertex anti-tilt assembly 4 is fixedly arranged on the top of the blade fixed connection upper bracket 13 so that the vertex of the square telescopic rod 11 is limited in the horizontal direction to prevent the wind turbine from tipping over but can still rotate smoothly. There are a plurality of wind-proof ropes 5 and ground plugs 6 (generally not less than three sets), one end of the wind-proof rope 5 is connected to the wind turbine vertex anti-tilt assembly 4, and the other end is connected to the ground plug 6. When working, a plurality of ground plugs 6 are evenly and radially inserted into the soil to fix the wind turbine vertex anti-tilt assembly 4 to prevent the wind turbine from tipping over.

[0035] Compared with the prior art, the double-conical vertical-axis folding portable wind power generation device with cloth blades and elastic cables provided by the present invention has a single elastic steel wire frame and a blade cable for each cloth blade frame and closely cooperates with the two, thereby reducing the unfavorable conditions of uneven blade flatness and wrinkles caused by inconsistent performance of the existing two or more steel wire frames. In addition, the upper and lower vertices of the cloth blades are pre-stretched by the blade tensioning elastic cables, so that the surface of each cloth blade is smooth and wrinkle-free after unfolding, thereby improving the stability of the force and shape of the blades during operation; and the blade tensioning elastic cables are used to tension the umbrella cloth blades on the blades of the retractable wind turbine, which are fixedly connected to the upper and lower brackets and the elastic steel wire frame, further ensuring the roundness and smoothness of the cloth blade surface, and can stably and efficiently intercept wind energy, thereby ensuring that the blades have a high energy conversion efficiency, and are particularly suitable for emergency power supply operations for frequently moving personnel in remote areas with relatively disordered wind resources.

[0036] As a specific embodiment, the square telescopic rod 11 is composed of 3 to 4 sections of stainless steel or high-hardness aluminum alloy hollow 4-square or 6-square tubes that are tightly nested with each other. The total length after stretching is 1 to 1.5 meters. Each section of the square tube is 15 to 30 mm thick, 0.8 to 1.5 mm thick, and 300 to 500 mm long, so as to ensure its bending strength and lightness. Among them, before the two adjacent nested tubes are locked by the elastic movable locking pin 19, they can slide relative to each other in the axial direction but cannot rotate relative to each other.

[0037] As a specific example, please refer to Figure 5 and Figure 6As shown, the blade sliding connection bracket 12 is provided with an inner square hole 121 in the middle which is sleeved with the square telescopic rod 11, and the inner square hole 121 cooperates with the square outer edge of the middle section of the square telescopic rod 11 (the section in the middle of 1 / 2 of the total length); a plurality of (such as three) steel wire frame limiting grooves 122 are radially provided on the outer edge, and a steel wire frame rotation axis hole 123 which penetrates the steel wire frame limiting groove 122 is provided on the side wall, and a skeleton rotation connection hole 151 is provided at the head end of the elastic steel wire frame 15, and a side of the elastic steel wire frame 15 with the skeleton rotation connection hole 151 is inserted into the steel wire frame limiting groove 122 for alignment, and bolts are inserted into the steel wire frame rotation axis hole 123 and the skeleton rotation connection hole 151 for connection, so that the head end of the elastic steel wire frame 15 can be rotatably connected to the blade sliding connection bracket 12, so that the elastic steel wire frame 15 can rotate in the steel wire frame limiting groove 122 along the axis of the steel wire frame rotation axis hole 123. The setting of the steel wire frame limiting groove 122 needs to ensure that the elastic steel wire frame 15 can rotate at least within the range of 0 to 90 degrees, that is, it can be parallel to the square telescopic rod 11 and perpendicular to the square telescopic rod 11, so that the cloth blades 17 can be unfolded and stored.

[0038] As a specific example, please refer to Figure 3 , Figure 4 and Figure 6 As shown, a blade midpoint connecting hole 152 is provided near the head end of the elastic steel wire skeleton 15, and a blade cable connecting hole 153 is provided at the tail end of the elastic steel wire skeleton 15. The inner middle point (point D) of the conical blade is connected to the blade midpoint connecting hole 152 by a blade tensioning elastic cable 18, the midpoint of the blade cable 16 is sleeved with the blade cable connecting hole 153, and the inner middle arc apex (point B) of the conical blade is also connected to the blade cable connecting hole 153 by a blade tensioning elastic cable 18. In addition, the upper and lower vertices A of the aforementioned cloth blade 17 are elastically connected to the upper and lower brackets fixedly connected to the blade through the blade tensioning elastic cable 18, thereby making the entire cloth blade 17 subjected to very uniform force, reducing or even avoiding the problem of uneven and rough blade surface caused by various unbalanced factors. When designing the three holes on the elastic steel wire skeleton 15, the skeleton rotation connection hole 151 at the head end is a half-turn (about 2 / 3 turn) steel wire ring, and the two circular side surfaces of the steel wire ring are parallel to ensure that the side force of the steel wire ring is stable and can rotate freely around the axis of the steel wire skeleton rotation shaft hole 123. The remaining two holes, the blade midpoint connection hole 152 and the blade cable connection hole 153, are single-turn steel wire rings to ensure that each connection is good.

[0039] As a specific embodiment, the elastic steel wire skeleton 15 uses a high elastic stainless steel wire or a high spring steel wire with a diameter of 2.5-3.0 mm and a length of 30-50 cm, which is not only portable, but also has elasticity, rigidity and recovery characteristics within a certain range, so that the steel wire can be bent to a certain extent, the cloth blades can be smoothly unfolded, and the recovery force is not particularly large, so that the cloth blades are not excessively stretched and damaged. At the same time, the elastic recovery force is not particularly small, so that the cloth blades are too deformed when exposed to wind and the energy conversion efficiency is too low, or even the concave and convex direction of the blades changes, which seriously reduces the energy conversion efficiency.

[0040] As a specific embodiment, the function of the blade cable 16 is to tighten the outer vertex (the tail end of the steel wire skeleton) of the elastic steel wire skeleton 15 when the square telescopic rod 11 is stretched to the point where the elastic movable locking pin 19 is triggered and locked, so that the square telescopic rod 11 is bent to a certain extent. After being tightened, the blade cable 16 and the elastic steel wire skeleton 15 together constitute the skeleton of the cloth blade 17. The two ends of the blade cable 16 are respectively fixedly connected to the blade cable connection holes 141 corresponding to the blade fixed connection upper bracket 13 and the blade fixed connection lower bracket 14, and the midpoint is sleeved with the blade cable connection hole 153 of the elastic steel wire skeleton 15. The length needs to be determined comprehensively according to the total length of the square telescopic rod 11 after stretching and the length of the elastic steel wire skeleton 15 after bending, so as to ensure the best utilization rate of wind energy. Specifically, the blade cable 16 adopts a nylon rope with a thickness of 2.5 to 3.5 mm, or a stainless steel rope with a thickness of 1.5 to 2 mm, to ensure lightness and tensile strength.

[0041] As a specific embodiment, there are three cloth blades 17, that is, a set of generators includes three complete cloth blades, each of which consists of Figure 4 The flat cloth pieces shown are sewn symmetrically at the upper and lower arc sides C, that is, each cloth blade 17 is composed of two upper and lower umbrella cloths (roughly shaped as shown in FIG. Figure 4The blades are symmetrically stitched at the upper and lower arc edges C to form conical blades. Method for determining the shape of conical blades: Assessment of environmental wind resources. According to the distribution law of wind speed in the common areas of portable wind turbines, estimate 1) Blade shape modeling and simulation: Use simulation software such as COMSOL to build a fluid mechanics model and simulate the effects of various blade shapes on wind energy interception, where the wind speed is determined according to the common use environment of the wind turbine, and select the best blade shape, that is, the optimal fan height and rotor turning radius. 2) Physical model production: According to the simulation results, a physical model of the wind turbine that does not contain conical blades is produced. 3) Determine the size of the cloth blade: unfold the physical model of the wind turbine without the tapered blades, bend the steel wire into the shape of the simulation model and fix it, and then cover the large piece of umbrella cloth with the bent steel wire (i.e., the elastic steel wire skeleton 15) in the same way as the aircraft blade skin, tighten each vertex appropriately, make the blade surface round and have a certain pre-tensioning force, and then fix it with the upper bracket 13 or the lower bracket 14, and then follow the marked vertices, the contact track between the cloth blade and the bent steel wire. Finally, reserve the hemming width according to each marked point, and then draw the cutting line before cutting and sewing. That is, after the conical blades are cut, spliced, and sewn, the blade cables 16 are inserted into the upper and lower outer bevel edges, and the two ends of the cable are fixed. The inner surface of the arc-shaped outer bulge in the middle of the conical blade is stretched open by the elastic steel wire skeleton 15, and the length of the bevel of each cloth blade is required to be longer than the total length of the elastic steel wire skeleton after straightening, so that the cloth blade and the elastic steel wire skeleton can be folded smoothly. Since the conical blades are cut and sewn according to the three-dimensional shape of the elastic steel wire skeleton 15 and the blade cables 16 after the wind wheel is unfolded, the conical blades can fit well with the elastic steel wire skeleton 15 and the blade cables 16, ensuring that the surface of the blades is round and wrinkle-free after unfolding.

[0042] As a specific embodiment, the blade tensioning elastic cable 18 is made of high-elastic nylon fabric or a tension spring with a certain elasticity, and the tension needs to be within a certain range to ensure wind resistance and protect the blades from damage due to excessive tension.

[0043] As a specific example, please refer to Figure 3 and Figure 7As shown, the wind turbine vertex anti-tilt assembly 4 includes a wind turbine vertex anti-tilt bracket 41, an anti-tilt connecting support 42, a rolling bearing 43, an isolation pad 44 and a connecting bolt 45. The wind turbine vertex anti-tilt bracket 41 has a threaded hole 411 in the middle and vertex bracket holes 412 connected to one end of the wind-proof rope 5 are radially and evenly arranged on the outer edge. The anti-tilt connecting support 42 is inserted into the upper hollow inner side of the square telescopic rod 11 and fixedly sleeved. The anti-tilt connecting support 42 has a mounting hole 421 in the middle. The mounting hole 421 can be specifically set as a stepped hole. Two rolling bearings 43 are symmetrically fixedly nested in the mounting hole 421. The outer ends of the two rolling bearings 43 are fixedly nested with isolation pads 44. The screw of the connecting bolt 45 is inserted into the threaded hole 411 and the vertex bracket hole 412, passes through the rolling bearing 43 and the isolation pad 44, and then extends out of the mounting hole 421 and is locked with the nut of the connecting bolt 45. As an implementation manner, the number of the vertex bracket holes 412 can be set to three, and the corresponding number of the wind-proof ropes 5 and the ground plugs 6 is also three, thereby being able to well fix the wind turbine vertex anti-tilt assembly 4.

[0044] As a preferred embodiment, please refer to Figures 1 to 3 As shown, a ground plug 6 (two cylindrical ground plugs or one flat ground plug to prevent the housing of the permanent magnet generator 3 from rotating together with the motor main shaft) is fixedly provided at the bottom of the housing of the permanent magnet generator 3, so that the ground plug 6 can also be inserted into the soil to quickly fix the permanent magnet generator 3.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A double-conical vertical-axis foldable portable wind power generation device with elastic cables and cloth blades, characterized in that: It includes a wind turbine, a wind turbine motor coupling, a permanent magnet generator, a wind turbine top anti-tilt assembly, a wind-proof rope and a ground plug; among which, The wind turbine comprises a square telescopic rod, a blade sliding connection bracket, a blade fixed connection upper bracket, a blade fixed connection lower bracket, an elastic steel wire skeleton, a blade cable, a cloth blade and a blade tensioning elastic cable, the square telescopic rod is composed of a plurality of metal hollow square tubes that are tightly nested and matched with each other, and an elastic movable locking pin is used between two adjacent metal hollow square tubes for telescopic locking and positioning; the blade sliding connection bracket is sleeved in the middle of the square telescopic rod, and can slide freely up and down in the middle section of the square telescopic rod but cannot rotate; the blade fixed connection upper bracket is fixedly sleeved on the upper end of the square telescopic rod, and the blade fixed connection lower bracket is fixedly sleeved on the lower end of the square telescopic rod, and the outer edges of the blade fixed connection upper bracket and the blade fixed connection lower bracket are radially and evenly provided with a plurality of blade cable connection holes and blade vertex connection holes; the elastic steel wire skeleton The head end of the frame can be rotatably connected to the blade sliding connection bracket; the upper end of the blade cable is fixedly connected to the blade cable connection hole of the blade fixed connection upper bracket, the lower end of the blade cable is fixedly connected to the blade cable connection hole of the blade fixed connection lower bracket, and the midpoint of the blade cable is connected to the tail end of the elastic steel wire skeleton; there are multiple cloth blades, each of which is formed by two fan-shaped umbrella cloths symmetrically sewn together on the upper and lower arc edges to form a conical blade, and the upper and lower outer bevel edges of the conical blade are wrapped to form a cloth sleeve, and the blade cable is inserted into the cloth sleeve, and the inner surface of the arc-shaped curved outer drum part in the middle of the conical blade is supported by the elastic steel wire skeleton; the blade tensioning elastic cable elastically connects the upper vertex of the conical blade to the blade vertex connection hole of the blade fixed connection upper bracket and the lower vertex to the blade vertex connection hole of the blade fixed connection lower bracket; The main shaft of the permanent magnet generator is inserted into the hollow inner side of the lower end of the square telescopic rod and fixedly connected through the wind turbine motor coupling. The permanent magnet generator is also embedded with a current conversion circuit that outputs a stable voltage. The fan apex anti-tilt assembly is fixedly arranged on the top of the bracket fixedly connected to the blade so that the apex of the square telescopic rod is limited in the horizontal direction to prevent the fan from tipping over but can still rotate smoothly. There are several wind-proof ropes and ground plugs, one end of the wind-proof rope is connected to the fan apex anti-tilt assembly, and the other end is connected to the ground plug.

2. The double-conical vertical-axis foldable portable wind power generation device with elastic cables and cloth blades according to claim 1 is characterized in that: The square telescopic rod is composed of 3 to 4 sections of stainless steel or high-hardness aluminum alloy hollow 4-square or 6-square tubes that are tightly nested with each other. The total length after stretching is 1 to 1.5 meters. Each section of the square tube is 15 to 30 mm thick, 0.8 to 1.5 mm thick, and 300 to 500 mm long.

3. The double-conical vertical-axis foldable portable wind power generation device with elastic cables and cloth blades according to claim 1 is characterized in that: The blade sliding connection bracket is provided with an inner square hole in the middle for being sleeved with the square telescopic rod, a plurality of steel wire frame limiting grooves are radially provided on the outer edge, and a steel wire frame rotation axis hole penetrating the steel wire frame limiting groove is provided on the side wall. The head end of the elastic steel wire frame is provided with a skeleton rotation connection hole, and the side of the elastic steel wire frame with the skeleton rotation connection hole is inserted into the steel wire frame limiting groove for alignment, and bolts are inserted into the steel wire frame rotation axis hole and the skeleton rotation connection hole for connection.

4. The double-conical vertical-axis foldable portable wind power generation device with elastic cables and cloth blades according to claim 3 is characterized in that: A blade midpoint connecting hole is provided near the head end of the elastic steel wire skeleton, and a blade cable connecting hole is provided at the tail end of the elastic steel wire skeleton. The inner middle point of the conical blade is connected to the blade midpoint connecting hole by a blade tensioning elastic cable, the midpoint of the blade cable is sleeved with the blade cable connecting hole, and the inner middle arc apex of the conical blade is also connected to the blade cable connecting hole by a blade tensioning elastic cable.

5. The double-conical vertical-axis foldable portable wind power generation device with elastic cables and cloth blades according to claim 1 is characterized in that: The elastic steel wire skeleton is made of high-elastic stainless steel wire or high-spring steel wire with a diameter of 2.5-3.0 mm and a length of 30-50 cm.

6. The double-conical vertical-axis foldable portable wind power generation device with elastic cables and cloth blades according to claim 1 is characterized in that: The blade cable is made of a nylon rope with a thickness of 2.5 to 3.5 mm, or a stainless steel rope with a thickness of 1.5 to 2 mm.

7. The double-conical vertical-axis foldable portable wind power generation device with elastic cables and cloth blades according to claim 1 is characterized in that: There are three cloth blades.

8. The double-conical vertical-axis foldable portable wind power generation device with elastic cables and cloth blades according to claim 1 is characterized in that: The blade tensioning elastic cable is made of high-elastic nylon cloth or tension spring.

9. The double-conical vertical-axis foldable portable wind power generation device with elastic cables and cloth blades according to claim 1 is characterized in that: The fan apex anti-tilt assembly includes a fan apex anti-tilt bracket, an anti-tilt connecting support, a rolling bearing, an isolation pad and a connecting bolt. A threaded hole is provided in the middle of the fan apex anti-tilt bracket and apex bracket holes connected to one end of the wind-proof rope are radially and evenly arranged on the outer edge. The anti-tilt connecting support is inserted into the hollow inner side of the upper end of the square telescopic rod and fixedly sleeved. A mounting hole is provided in the middle of the anti-tilt connecting support. Two rolling bearings are symmetrically fixedly nested in the mounting hole. Isolation pads are fixedly nested at the outer ends of the two rolling bearings. The screw of the connecting bolt is inserted into the threaded hole and the apex bracket hole, passes through the rolling bearing and the isolation pad, and then extends out of the mounting hole and is locked with a nut.

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