Giant modular wind power system

Abstract

A giant modular wind power system comprises a wind wheel, and the wind wheel comprises at least two sets of stacked blades. Each group of stacked blades comprises at least two blades which are arranged up and down, and the upper and lower blades form a truss structure through a supporting body, so that the bending resistance of the stacked blades is more than three times higher than that of a single blade. The strength, the bending resistance and the fatigue resistance of the stacked blades can be greatly improved, the stacked blades cannot be damaged even if strong wind is encountered, then the safety of the whole wind wheel and the tower is protected, and economic losses are reduced; the wind power system can emit green electricity everywhere globally without going uphill and downsea, when the fan blades are made of aluminum materials, the service life can reach at least 60 years, and the fan blades can be recycled after being abandoned and cannot pollute the environment; and all parts can be delivered according to the size of a container, so that global barrier-free and low-cost transportation is realized.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation, in particular to a giant modular wind power system. Background Art

[0002] As a renewable energy source, wind power generation has been widely used due to its low-carbon and clean characteristics. However, the safety and stability of wind turbine impellers and towers under strong wind conditions have always been a technical problem that needs to be solved urgently in the industry. Especially under extreme weather conditions, such as strong typhoons, the wind load on wind power generation equipment increases significantly, leading to equipment damage and safety hazards, such as blade breakage and tower fracture, highlighting the extreme challenges faced by blades under strong winds.

[0003] The existing horizontal axis wind turbines usually have at least three sets of blades in their wind rotors, and each set of blades is a single-blade structure. When subjected to strong winds or sudden airflows, the single-blade structure has a weak bending resistance and is prone to deformation. The bending and twisting of the blades may cause fatigue damage, accelerating the aging and failure of the blades. Since the wind rotor is subjected to repeated bending stress during high-speed rotation, the blades of the single-blade structure are more prone to fatigue cracks, thereby affecting the overall stability and safety of the wind turbine. Fatigue problems are particularly prominent under extreme weather conditions. Once the blades cannot withstand the wind pressure, they are prone to breakage. If the impact of the blade breakage is large enough, it may cause the tower to tilt or collapse completely, especially under high wind speeds or severe weather conditions, where collapse will cause greater danger.

[0004] Therefore, the present invention urgently needs to design a new blade structure to improve the safety and reliability of the wind turbine. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and provide a giant modular wind power system with strong bending resistance, good fatigue resistance, high strength, high stability and high safety.

[0006] The technical solution of the present invention is: a giant modular wind power system, including a wind wheel, the wind wheel includes at least two groups of stacked blades; each group of stacked blades includes at least two blades arranged up and down, and a truss structure is formed between the upper and lower blades through a support body, so that it has a bending resistance that is more than 3 times that of a single blade.

[0007] Furthermore, the upper and lower blades of the stacked leaves are not arranged in parallel, and the gap between the upper and lower blades gradually increases along the direction from the blade tip to the blade root of the stacked leaves.

[0008] Furthermore, the blade is divided into multiple sections along the length direction, and adjacent sections of the blade are connected with equal cross-sections; in each section of the blade, the same first angle of attack is maintained from the root to the middle of the blade, and the same second angle of attack is maintained from the middle to the tip of the blade, and the first angle of attack is greater than the second angle of attack; or the angle of attack of at least two adjacent sections of the blade located near the root of the blade is greater than the angle of attack of other sections; or each section of the blade maintains the same angle of attack, and the angle of attack is greater than 0°.

[0009] Furthermore, the support body includes a plurality of support trusses, and support trusses are provided at both ends of the folded leaves and between adjacent sections.

[0010] Furthermore, the blade is divided into multiple sections along the length direction, each section includes a blade core plate and a blade bone arranged in the cavity of the blade core plate; the blade core plate is divided into a blade head and a blade body along the width direction, the blade head includes an upper blade head and a lower blade head, the blade body includes an upper blade body and a lower blade body, the upper and lower blade heads are connected to form an arc-shaped blade head, and the upper and lower blade bodies are connected to form a tip at the tail end.

[0011] Furthermore, the blade skeleton includes a head rod, a tail rod and at least two middle rods, extending along the length direction of each blade section, wherein the two middle rods are respectively arranged at the upper joint and the lower joint of the blade head and the blade body, or at the upper and lower positions of the middle section of the blade head; the head rod is arranged at the joint of the upper blade head and the lower blade head, and the tail rod is arranged at the angle between the tail ends of the upper blade body and the lower blade body; ring rods are arranged between the head rod and each middle rod and between the tail rod and each middle rod; a middle support rod is arranged between the upper and lower middle rods.

[0012] Furthermore, the cross-sectional shape of the enclosed ring rod is the same as that of the blade core plate, and the ring rod and the blade core plate are fixed by rivets; or the ring rod and the inner wall of the blade core plate are glued and further fixed by rivets.

[0013] Furthermore, the blade is divided into a plurality of sections along the length direction, and inner blade ropes are provided in at least two sections of the blade close to the blade tip.

[0014] Furthermore, the wind wheel also includes a handle wheel, which includes a hub, a blade root group, a petiole and a ring frame; the petiole is connected to the hub, and the blade root group is connected between the stacked blades and the petiole; the ring frame includes a short ring frame, a long ring frame and a ring frame support; the long ring frame and the short ring frame are both arranged between adjacent petioles, and the short ring frame is arranged close to the hub, and the long ring frame is arranged away from the hub; the ring frame support is provided between the long ring frame and the petiole.

[0015] Furthermore, the petiole is a truss structure, and the petiole includes a main truss, a large handle frame, a small handle frame and a high handle frame; the main truss is divided into multiple sections along the length direction, and adjacent sections are flange-connected; the large handle frame and the small handle frame are connected to one side of the main truss, the small handle frame is connected to at least two sections close to the folded leaves, the large handle frame is connected to at least two sections close to the hub, and the height of the large handle frame is greater than that of the small handle frame; the high handle frame is connected to the side of the large handle frame away from the main truss.

[0016] Furthermore, the handle wheel also includes a handle rope, and the handle rope includes a handle front rope, a handle frame rope, a handle long loop rope, a handle middle loop rope, a handle short loop rope, and a handle hub rope; the handle long loop rope is connected between adjacent petioles, and the length of the handle long loop rope is greater than the length of the long loop frame; the handle middle loop rope is connected between adjacent petioles, and is close to the short loop frame and is arranged on the outside of the short loop frame; the handle short loop rope is connected between adjacent petioles, and is arranged between the short loop frame and the hub; the handle hub rope is connected between the hub and the petiole; the handle front rope is connected between the handle large frame and the handle small frame; the handle frame rope is connected to the handle large frame or the handle high frame.

[0017] Beneficial effects of the present invention:

[0018] (1) By designing stacked blades and combining them with a support body to form a truss structure, the blades have a bending resistance that is more than three times greater than that of a single blade. The truss system allows strong winds to pass through the gaps between the stacked blades to relieve wind pressure, ensuring the strength of the blades without fatigue or bending, greatly improving the stability and safety of the blades. Even in strong winds, the stacked blades will not be damaged, thereby protecting the safety of the entire wind rotor and tower and reducing economic losses. In addition, the wind rotor can be designed to be larger.

[0019] (2) The leaves and petioles are divided into multiple sections along the length direction, which can greatly improve the transportation efficiency and facilitate installation and disassembly;

[0020] (3) The blades are made of core plates, which are light in weight and strong in strength. By designing a special blade bone structure in the blade core plate, not only can the strength of the blade be ensured, but also the connection between adjacent blades is facilitated. Moreover, the blade bones are connected to the support body and the blade rope as a whole, which can improve the overall strength, bending resistance and fatigue resistance of the stacked blades.

[0021] (4) The strength and bending resistance of the petiole can be greatly improved by designing the petiole structure; the connection strength between adjacent petioles can be improved by setting a long ring frame, a short ring frame and a ring frame support, and the stability of the entire wind wheel can be improved;

[0022] (5) By setting blade ropes and handle ropes, the fatigue resistance of the entire wind wheel can be greatly improved.

[0023] (6) Wind power systems can generate green electricity everywhere in the world without having to go up mountains or down the sea. When a 30MW wind power system with a tower height of 300 meters is used, the annual power generation is 1 to 2 times more than that of a short tower, and the payback period is 3 to 4 times shorter. When the wind blades are made of aluminum, their lifespan can reach at least 60 years, and they can be recycled after being discarded without polluting the environment. In addition, all components can be shipped according to the size of containers, allowing barrier-free and low-cost transportation around the world. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of a wind power system according to Embodiment 1 of the present invention;

[0025] Figure 2 This is a schematic structural diagram of a wind power system with a single set of folded blades in Embodiment 1 of the present invention;

[0026] Figure 3 is a schematic diagram of the three-dimensional structure of the folded leaves in Example 1 of the present invention;

[0027] Figure 4 Schematic diagram of the combined structure of the folded leaves and petioles of Example 1 of the present invention;

[0028] Figure 5 It is a cross-sectional schematic diagram of each section of the double-layer blade of Example 1 of the present invention;

[0029] Figure 6 is a schematic diagram of the three-dimensional structure of the support truss of Example 1 of the present invention;

[0030] Figure 7 is a schematic cross-sectional view of a single blade of Example 1 of the present invention;

[0031] Figure 8 Schematic diagram of the connection structure between the ring rod and the blade core plate of Example 1 of the present invention;

[0032] Fig. 9 It is a schematic diagram of the split structure of the blade core plate of Example 1 of the present invention;

[0033] Fig.10 Schematic diagram of the blade tail connection structure of the blade core plate of embodiment 1 of the present invention;

[0034] Fig.11 is a schematic structural diagram of the first connector of Embodiment 1 of the present invention;

[0035] Fig.12 is a schematic structural diagram of a second connector according to Embodiment 1 of the present invention;

[0036] Fig.13 is a schematic diagram of the connection nodes of the support truss of Example 1 of the present invention;

[0037] Fig.14 Schematic diagram of the angle of attack of each blade section in Example 1 of the present invention;

[0038] Fig.15 is a schematic diagram of a leaf rope according to Embodiment 1 of the present invention;

[0039] Fig.16 1 is a schematic diagram of the structure of the handle wheel of Example 1 of the present invention (excluding the blade root connection assembly);

[0040] Fig.17 is a schematic structural diagram of a petiole according to Embodiment 1 of the present invention;

[0041] Fig.18 This is a schematic diagram of the connection structure of the blade-root connection assembly according to Embodiment 1 of the present invention;

[0042] Fig.19 is a schematic diagram of blade transportation in Example 1 of the present invention;

[0043] Fig. 20 This is a schematic diagram of petiole transportation in Example 1 of the present invention;

[0044] Fig.21 is a schematic cross-sectional view of a single blade of Example 2 of the present invention;

[0045] Fig. 22 yes Fig.21 The schematic diagram of the split structure of Example 2 is shown;

[0046] Fig.23 yes Fig.21 A schematic diagram of the blade tail connection structure of the blade core plate of Example 2 is shown.

[0047] Description of reference numerals:

[0048] 1. Wind wheel; 2. Handle wheel; 3. Stacked blades; 4. Tower; 5. Long arc frame; 6. Short arc frame; 7. Long flat frame; 8. Short flat frame; 9. Core tube;

[0049] 21. Hub; 22. Blade root assembly; 23. Petiole; 24. Petiole rope; 25. Abutment; 26. Long ring frame; 27. Short ring frame; 28. Ring frame support; 31. Blade; 32. Support truss; 33. Blade inner rope; 34. Blade ring rope; 35. Blade root ring rope; 36. Stabilizing rope; 37. First connector; 38. Second connector;

[0050] 221, head and tail ring rod; 222, cross bar; 223, connecting rod; 224, supporting rod; 231, main truss; 232, large handle frame; 233, small handle frame; 234, high handle frame; 241, front handle rope; 242, handle frame rope; 243, long handle ring rope; 244, middle handle ring rope; 245, short handle ring rope; 246, handle hub rope; 321, chord rod; 322, connecting rod; 311, leaf core plate; 312, leaf bone; 371, rod seat; 372, rope rod seat; 373, joint;

[0051] 3110, upper blade head; 3111, lower blade head; 3112, upper blade body; 3113, lower blade body; 3114, arc core rib; 3115, flat core rib; 3116, flat core rib at the tip; 3117, rib patch strip; 3120, head rod; 3121, tail rod; 3122, middle rod; 3123, ring rod; 3124, middle support rod; 3125, side support rod; 3126, silicone structural adhesive; 3127, countersunk blind rivets; 3128, round head blind rivets; 3129, oblique support rod. DETAILED DESCRIPTION

[0052] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] Example 1

[0054] like Figure 1 and Figure 2 As shown: A giant modular wind power system includes a wind wheel 1, the wind wheel 1 includes a handle wheel 2 and at least two groups of stacked blades 3 connected to the handle wheel 2, preferably three groups; each group of stacked blades 3 includes double-layer blades 31 arranged up and down, a support body arranged between the double-layer blades 31, and a blade rope, wherein a truss structure is formed between the double-layer blades 31 and the support body, so that it has a bending resistance that is more than 3 times that of a single blade 31. The double-layer blades 31 are segmented into multiple sections to form a modular structure for easy transportation. The handle wheel 2 includes a hub 21, a blade root connection group 22, a blade stalk 23, and a handle rope 24; the number of the blade root connection group 22 and the blade stalk 23 corresponds to the number of stacked blades 3, so that each group of stacked blades 3 is connected to the blade stalk 23 through the blade root connection group 22, and then connected to the hub 21 through the blade stalk 23. There are a plurality of handle ropes 24, which are respectively connected between the relevant components of the handle wheel 2.

[0055] The modular wind power system of this embodiment is a horizontal axis wind turbine, the wind rotor 1 is connected to the generator via the main shaft, the generator is arranged on the base, the base is used to fix the nacelle and support the entire wind rotor 1, and the base is installed on the tower 4. The tower 4 preferably adopts a full truss structure.

[0056] The following is a preferred embodiment of the wind wheel 1 of the present invention:

[0057] 1. The structure of the stacked leaf 3:

[0058] like Figure 3 to Figure 6As shown: In this embodiment, the double-layer blade 31 is segmented into multiple sections, which are divided into sections Y1 to Y8 in sequence from the tip to the root. The support body includes multiple support trusses 32. Support trusses 32 are provided at both ends of the double-layer blade 31 (the tip of the Y1 section and the root of the Y8 section) and between adjacent sections, thereby improving the strength and rigidity of the double-layer blade 31. The support trusses 32 include two chord rods 321 and at least two connecting rods 322 provided between the chord rods 321. The connecting rods 322 are cross rods or oblique rods. The chord rods 321 are welded or threadedly connected to the double-layer blade.

[0059] The double-layer blades of this embodiment are all made of core plates. The core plates include a face plate, a sandwich layer, and a face plate. The sandwich layer is preferably designed as a core tube array, that is, it includes a plurality of core tubes 9 arranged at intervals. The upper and lower ends of the core tubes 9 are flanged and brazed to the face plates, respectively. A frame is provided around the sandwich layer between the upper and lower face plates. The core plate can be designed as an arc-shaped core plate or a flat core plate according to the requirements of the blade.

[0060] For example, the structure of each layer of blades can adopt a segmented wind turbine blade and its transportation method as disclosed in patent application number 2023107312018, and adopt its blade body as the blade structure of this embodiment, that is, each section of the blade is divided into a blade head, a blade body and a blade tip along the width direction, and a reinforcing structure is provided between the blade head and the blade body and between the blade body and the blade tip as a blade bone.

[0061] For example, Figure 7 As shown: This embodiment designs a new blade structure, specifically: each section Y1 to Y8 in the blade 31 includes a blade core plate 311 and a blade bone 312 arranged in the cavity of the blade core plate 311, and the blade core plate 311 is divided into a blade head and a blade body along the width direction, wherein the blade head includes an upper blade head 3110 and a lower blade head 3111, and the blade body includes an upper blade body 3112 and a lower blade body 3113. The upper and lower blade heads are connected to form an arc-shaped blade head, and the upper and lower blade bodies are connected to form a tip at the tail end. The entire blade core plate is welded or glue-coated and riveted to fix multiple core plates constituting the blade head and the blade body.

[0062] The blade bone 312 includes a head rod 3120, a tail rod 3121 and two middle rods 3122, and all extend along the length direction of each blade section. The two middle rods 3122 are respectively arranged at the upper joint and the lower joint between the blade head and the blade body, or at the upper and lower positions of the middle section of the blade head; the head rod 3120 is arranged at the joint of the upper blade head 3110 and the lower blade head 3111; the tail rod 3121 is arranged at the angle between the two plane core plates of the upper blade body 3112 and the lower blade body 3113.

[0063] Among them, ring rods 3123 are provided between the head rod 3120 and each middle rod 3122, and between the tail rod 3121 and each middle rod 3122, and ring rods are also provided between the tail rod and the angle between the upper and lower blade bodies; for example, the ring rod 3123 between the head rod 3120 and the middle rod 3122 is an arc rod, and the other ring rods 3123 are straight rods, so that multiple ring rods 3123 are combined to form a water drop-shaped structure with the same cross-sectional shape as the blade 31, referred to as a water drop-shaped ring rod, and each section of the blade 31 is arranged with a plurality of water drop-shaped ring rods at intervals along the length direction to strengthen the strength of the blade 31. In addition, a middle support rod 3124 is provided between the upper and lower middle rods 3122 at each water drop-shaped ring rod position, and a plurality of side support rods 3125 are provided between the head rod 3120 and the tail rod 3121, which can be vertical rods or oblique rods, so that the entire blade skeleton 312 forms a truss structure.

[0064] In this embodiment, the head rod 3120, the tail rod 3121 and the two middle rods 3122 are all hollow tube rods, and the ring rod 3123 is a groove rod. The ring rod 3123 is welded to the head rod 3120, the tail rod 3121 and the middle rod 3122, and the ring rod 3123 is fixed to the inner wall of the blade core plate 311 by glue riveting. Figure 8 As shown: 1 mm thick silicone structural adhesive 3126 is applied between the ring rod and the connected core plate, and reinforced by round head blind rivets 3128.

[0065] The specific structure of the blade core plate 311 in this embodiment is as follows:

[0066] (1) Leaf head

[0067] like Fig. 9 As shown: the upper blade head 3110 and the lower blade head 3111 are both arc-shaped core plates. If the core tube 9 is used entirely in the sandwich layer of the arc-shaped core plate, the connection strength is easily reduced for the portion with a larger curvature, and it is also difficult to process and manufacture. Therefore, when an arc-shaped core plate is used, the sandwich layer of this embodiment preferably adopts a structure combining core ribs and core tubes 9, because the core ribs are a single-plate structure, which is convenient for designing the curvature. When the core ribs are set at a position with a larger curvature, the connection strength can be improved, and the manufacture is simple, but the strength is poor. In order to improve the strength of the entire blade head, this embodiment sets a core tube at a position where the curvature of the arc-shaped core plate is relatively gentle, which can reduce the difficulty of processing and ensure the overall strength. The following is a specific description of the structure of the blade head:

[0068] The arc core plate of the upper blade head 3110 and the lower blade head 3111 includes a head section, a middle section and a tail section; the head section has a larger curvature, so an arc core rib 3114 is provided in the sandwich layer of the head section. The middle section is a transition section from the arc surface to the plane, and the sandwich layer of this section adopts a structure combining a flat core rib 3115 and a core tube 9. The curvature of the tail section is 0, that is, it is a plane section, so the sandwich layer of this section adopts a core tube.

[0069] In the head section of the upper blade head 3110 and the lower blade head 3111, the arc core rib 3114 extends along the length direction of the panel, the connection surface between the arc core rib 3114 and the panel is an arc surface, the cross-sectional shape of the arc core rib 3114 is an I-shaped, and a protrusion is provided on the plate surface of the arc core rib 3114 to strengthen the structure. The upper blade head 3110 and the lower blade head 3111 are connected as a whole by a frame. Among them, in the upper blade head 3110 and the lower blade head 3111, the frame of one blade head is a long arc frame 5, and the frame of the other blade head is a short arc frame 6. The long arc frame 5 refers to the side connected to the corresponding blade head arc core plate, which is an arc-shaped long edge. Since both ends of the long arc frame 5 extend edges, the long edge is arranged on the side away from the head rod 3120, that is, the head side of the blade head, a part of the long edge is welded to the arc core plate, and the other part extends along the arc core plate; the main body of the long arc frame 5 is an inclined structure; the short arc frame 6 refers to the side connected to the corresponding blade head arc core plate, which is an arc-shaped short edge, and the short edge is welded to the arc core plate as a whole; and the panel of the arc core plate extends along the short arc frame 6, and the extended part is used to connect with the part extended from the long edge of the long arc frame 5 using countersunk blind rivets 3127, thereby realizing the connection between the upper blade head and the lower blade head. Among them, the main body of the short arc frame 6 is also an inclined structure. Preferably, the frame of the lower blade head 3111 is the long arc frame 5, and the frame of the upper blade head is the short arc frame 6. In addition, after the upper blade head and the lower blade head are connected as one, they are also glued and fixed with the head rod 3120 using structural adhesive, and the main body of the long arc frame 5 and the short arc frame 6 is further reinforced using structural adhesive, and the structural adhesive is preferably silicone structural adhesive 3126.

[0070] In the middle section of the upper blade head 3110 and the lower blade head 3111, the front end of the arc surface is relatively gentle, and the core tube 9 is used to enhance the strength; at least one flat core rib 3115 is provided between the transition from the arc surface to the flat surface, which plays a transition role, and the rear part of the flat core rib 3115 uses the core tube 9. The middle section and the middle rod 3122 are glued and fixed with silicone structural adhesive 3126.

[0071] The tail sections of the upper blade head 3110 and the lower blade head 3111 are planar structures, so as to facilitate connection with the planar core plate of the blade body. The core tubes 9 arranged at intervals are used in the sandwich layer of the tail section. Among them, the upper blade head 3110 is provided with a long flat frame 7 at the end connected to the upper blade body 3112. The long flat frame 7 refers to the side connected to the planar core plate of the upper blade body, which is a straight long edge, and a part of the long edge is welded to the arc-shaped core plate of the upper blade head 3110, and the other part extends along the arc-shaped core plate; similarly, the lower blade head 3111 is also provided with a long flat frame 7 at the end connected to the lower blade body 3113, which will not be described in detail here. It can be said that the arc-shaped core plate of the upper blade head 3110 of this embodiment is provided with a short arc frame 6 at one end and a long flat frame 7 at the other end; and the arc-shaped core plate of the lower blade head 3111 is provided with a long arc frame 5 at one end and a long flat frame 7 at the other end.

[0072] (2) Leaf body

[0073] like Fig.10 As shown: the upper blade 3112 and the lower blade 3113 both use a flat core plate, wherein the tail of the flat core plate of the upper blade forms a tip, and the tip is formed by cutting the lower panel of the upper blade and part of the sandwich layer short, so that an inclined surface is formed between the lower panel and the upper panel. The tail of the flat core plate of the lower blade is also a tip, and the upper panel and part of the sandwich layer are cut short, so that an inclined surface is formed between the upper panel and the lower panel. The lower panel of the lower blade extends toward the tip of the upper panel of the upper blade, and is connected to the upper panel of the upper blade to form a blade tip, and the connection is connected by full arc welding and glued at the connection.

[0074] Among them, the core layer of the upper blade body and the lower blade body adopts the core tube 9 at other positions except the tip; and the tip flat core rib 3116 is adopted at the tip, because the tip is an inclined surface and it is not easy to set the core tube. The tips of the upper blade body and the lower blade body are provided with a plurality of tip flat core ribs 3116 with decreasing heights successively, and the tip flat core rib 3116 is provided with a rib patch strip 3117 at the connection with the tip inclined surface; the rib patch strip 3117 is arranged parallel to the tip inclined surface and connected to each other through the silicone structural adhesive 3126. That is: the rib patch strip 3117 extends from one side of the lower end of the tip flat core rib 3116 in the upper blade body 3112, and the rib patch strip 3117 is glued and fixed to the lower panel extended from the lower blade body 3113; the rib patch strip 3117 extends from one side of the upper end of the tip flat core rib 3116 in the lower blade body 3113, and the rib patch strip 3117 is glued and fixed to the lower panel of the upper blade body 3112.

[0075] In addition, an angle is formed between the upper panel of the lower blade body 3113 and the lower panel of the upper blade body 3112, and silicone structural adhesive 3126 is coated at the angle, and a plate patch strip is provided on the outside of the adhesive, and the ring rod located between the tail rod and the angle between the upper and lower blade bodies is connected to the plate patch strip.

[0076] The upper blade body 3112 , the lower blade body 3113 and the tail rod 3121 are fixedly connected by using silicone structural adhesive 3126 .

[0077] The upper blade body 3112 and the lower blade body 3113 are both provided with a short flat frame 8 at the end connected to the upper blade head and the lower blade head tail section respectively, and the upper and lower panels of the upper blade body 3112 and the lower blade body 3113 respectively extend along the short flat frame 8 toward the blade head, and the extended part is connected to the part extending from the long flat frame 7 of the blade head by countersunk blind rivets 3127, and glue is applied between the corresponding long flat frame 7 and the short flat frame 8, thereby realizing the connection between the blade head and the blade body.

[0078] The manufacturing method of the entire blade in this embodiment is as follows:

[0079] S1: Apply glue and rivet the core plate frames of the upper blade head 3110 and the upper blade body 3112 to form the upper blade core plate; and apply glue and rivet the core plate frames of the lower blade head 3111 and the lower blade body 3113 to form the lower blade core plate;

[0080] S2: Apply glue and then rivet the blade upper core plate and the ring rods. Specifically, first apply glue on the back of the ring rod, preferably apply 1mm silicone structural glue 3126, and then connect the blade upper core plate and the teardrop-shaped ring rod by rivets according to the riveting spacing; similarly, apply glue and then rivet the blade lower core plate and the teardrop-shaped ring rod;

[0081] S3: Assembling the blade upper core plate, blade lower core plate and blade skeleton 312;

[0082] Specifically: first, weld the blade bones 312, that is, weld a plurality of middle support rods 3124 and a plurality of side support rods 3125; then, apply glue to the overlapped positions of the upper blade core plate, the lower blade core plate and the blade bones 312, and splice the upper blade core plate, the lower blade core plate and the blade bones 312 into a whole; then, weld the ring rod to the middle rod, the head rod and the tail rod, and glue the connection between the middle rod, the head rod, the tail rod and the core plate; finally, rivet the upper blade core plate and the lower blade core plate together at the blade head, thereby forming a section of the blade.

[0083] S4: tensioning the inner rope 33 in the blades of sections Y1 to Y4.

[0084] The following is a preferred embodiment of the connection between adjacent sections of the blade in this embodiment:

[0085] The adjacent sections of the blade 31 are connected with equal cross-sections, and the blade bones 312 of the adjacent sections are connected by connectors. For example, the head rod, the tail rod and the middle rod are threadedly connected by a connector with threads, or the connector is covered with the rod body of the adjacent section and then welded. In addition, if a rope needs to be set at this position, a rope rod seat is set at one end of the connector.

[0086] For example, Fig.11 and Fig.13 As shown in the figure, a first connector 37 is provided between the Y1 section and the Y2 section, between the Y2 section and the Y3 section, and between the Y3 section and the Y4 section. The first connector 37 includes a rod seat 371 located at both ends, two rope rod seats 372 extending in the front-rear direction of the rod seats 371 at both ends, and a joint 373 extending upward along the first connector 37. The connecting end of the joint 373 is a flange structure. The head rod or tail rod of the adjacent sections is respectively inserted into the rod seats 371 at both ends for fixing. The rope rod seat 372 is provided with an internal threaded hole for fixing the inner blade rope 33 and / or the blade ring rope 34. For example, a threaded connector is provided at the end of the inner blade rope 33 to facilitate threaded connection with the rope rod seat. The joint 373 is used to connect one end of the chord 321 of the support truss 32. The joint 373 is a threaded structure. The end of the chord 321 is also provided with a flange correspondingly. The chord is flange-connected to the joint 373. It can be understood that for other sections where the inner blade rope is not provided, the rope rod seat can be cancelled.

[0087] like Fig.12 As shown, the middle rods 3122 of each section Y1 to Y8 are connected by a second connector 38. The difference between the second connector 38 and the first connector 37 is that the second connector 38 has two fewer rope rod seats 372 and joints 373 than the first connector 37, and the other structures are similar or the same. The rod seats at both ends of the second connector 38 are used to connect the middle rods of adjacent sections.

[0088] In addition, since the outside between sections Y4 and Y5 needs to be connected to the leaf ring rope 34, rope rod seats in different directions can be set at the connecting head between the two adjacent sections to facilitate the connection between the leaf inner rope 33 and the leaf ring rope 34.

[0089] Table 1 is a list of preferred parameters of the blades in this embodiment:

[0090] Table 1 Blade related parameters

[0091]

[0092] The weight units in Table 1 are all kg, and the dimensions units are all mm. The side bars in Table 1 refer to the head bar and the tail bar; the blade core plate material of this embodiment is preferably aluminum, the total weight of the blade core plate is 9776 kg, and the total weight of the blade bone is 10719.4 kg (including the weight of the connector not shown in Table 1). It can be understood that the above is only a preferred parameter of this embodiment and does not limit the present invention.

[0093] In this embodiment, the upper and lower blades 31 of the double-layer blade 31 are arranged non-parallel, for example, the upper and lower blades 31 are arranged obliquely, or one blade 31 is arranged horizontally and the other blade 31 is arranged obliquely. The gap between the upper and lower blades 31 gradually increases from the tip of the stacked blade 3 to the root of the blade, that is, the gap between the upper and lower blades 31 in the direction of the Y1 to Y8 nodes gradually increases.

[0094] like Fig.14 As shown: In this embodiment, the blades 31 of each section of the stacked leaves 3 maintain the same angle of attack, for example, the angle of attack of sections Y1 to Y8 is 4°.

[0095] It is understandable that, in each section of the blade 31 of the stacked blade 3 of this embodiment, the same first angle of attack can be maintained from the root to the middle of the blade, and the same second angle of attack can be maintained from the middle to the tip of the blade, and the first angle of attack is greater than the second angle of attack. For example, sections Y6 to Y8 maintain the same first angle of attack, which is 4.3°; sections Y1 to Y5 maintain the same second angle of attack, which is 3°.

[0096] like Fig.15 As shown: In this embodiment, the blade rope includes a blade inner rope 33, a blade ring rope 34, a blade root ring rope 35 and a stabilizing rope 36. The blade inner rope 33, the blade ring rope 34 and the blade root ring rope 35 are all made of carbon cables, and the stabilizing rope 36 is made of steel wire rope.

[0097] Specifically, the inner blade rope 33 includes the inner blade rope of Y1, the inner blade rope of Y2, the inner blade rope of Y3 and the inner blade rope of Y4. However, the inner blade rope may not be provided in the Y5 to Y8 sections. In the Y1 to Y4 sections, the number of the inner blade ropes 33 in each section is 4. The four inner blade ropes of the Y1 section are connected between the rope rod seat at the tip of the blade and the rope rod seat at the joint of the Y1-Y2 section, the four inner blade ropes of the Y2 section are connected between the rope rod seat at the joint of the Y1-Y2 section and the rope rod seat 372 at the joint of the Y2-Y3 section, and so on. Two of the four inner blade ropes in each section are connected in a cross manner, and the other two are connected horizontally. The leaf ring rope 34 and the leaf root ring rope 35 are connected between the stacked leaves 3 and the handle wheel 2, and the stabilizing rope 36 is connected between the leaf ring rope 34 and the stacked leaves 3.

[0098] Table 2 is a list of preferred parameters of the blade rope in this embodiment:

[0099] Table 2 Leaf rope list

[0100]

[0101] In Table 2, the dimensions are in mm and the weights are in kg.

[0102] 2. The structure of the handle wheel:

[0103] like Fig.16As shown: In this embodiment, the handle wheel 2 includes a hub 21, a blade root assembly 22, a petiole 23, a ring frame and a handle rope 24. The petiole 23 is connected to the hub 21, the blade root assembly 22 is connected between the stacked blade 3 and the petiole 23, and the handle rope 24 is used to improve the fatigue resistance of the entire handle wheel 2.

[0104] Specifically, Fig.17 As shown: In this embodiment, the number of petioles 23 corresponds to the number of groups of stacked leaves 3, that is, one group of stacked leaves 3 corresponds to one petiole 23. The petiole 23 includes a main truss 231, a large truss frame 232, a small truss frame 233 and a high truss frame 234. The main truss 231 is preferably a truss structure with a quadrilateral cross-section, which is divided into multiple sections along the length direction, including sections Y9 to Y14, the Y9 section is connected to the blade root connection group 22, the Y14 section is connected to the hub 21, and the adjacent sections are flange-connected. The large truss frame 232 and the small truss frame 233 are connected to the front position of the main truss 231, wherein the small truss frame 233 is connected to the sections Y9 to Y11, the large truss frame 232 is connected to the sections Y12 to Y14, the height of the large truss frame 232 is greater than the small truss frame 233, and the high truss frame 234 is connected to the top of the large truss frame 232.

[0105] Preferably, the cross-sectional shapes of each face of the small handle frame 233 and the large handle frame 232 are all triangular. By setting the large handle frame 232 and the small handle frame 233, the strength and rigidity of the main truss 231 can be strengthened, and the blades are not easily broken even in strong winds. The large handle frame 232 and the small handle frame 233 are respectively connected to the main chord rods of the main truss 231 by flanges. The main truss 231, the large handle frame 232 and the small handle frame 233 are all combined into a truss structure by hollow tubes, and flange plates are arranged at the connection nodes of the hollow tubes for flange connection. One end of the small handle frame 233 is connected to the blade root connection group 22, and the other end is connected to one end of the large handle frame 232, and the other end of the large handle frame 232 is connected to the wheel hub 21. The high handle frame 234 includes a vertical rod connected to the large handle frame, an oblique rod connected between the vertical rod and the large handle frame, and a support rod connected between the oblique rod and the large handle frame. By adding a stem elevated frame 234 to the stem large frame 232, the rigidity and strength of the petiole can be further improved, especially the strength of the connection between the petiole and the hub can be improved.

[0106] like Fig.18As shown: In this embodiment, the blade root connection group 22 is a truss structure, including two head and tail ring rods 221 respectively connected to the double-layer blades 31, two cross bars 222 connected between the two head and tail ring rods 221, and a plurality of connecting rods 223 connected to the main truss Y9 section and the handle small frame 233. Among them, the head and tail ring rods 221 are adapted to the teardrop-shaped ring rod shape of the blade bone 312, and the head and tail ring rods 221 are threadedly connected or welded to the head rod 3120, the tail rod 3121, and the middle rod 3122 of the blade bone 312 through multiple connectors. One cross bar 222 is welded to the head of the two head and tail ring rods 221, and the other cross bar 222 is welded to the tail of the two head and tail ring rods 221; a plurality of vertical rods and oblique rods are arranged between adjacent cross bars 222. There are at least five connecting rods 223, four of which are respectively used to flange-connect the four main chords of the main truss 231, and at least one connecting rod 223 is used to connect the handle frame 233. Support rods 224 are provided between adjacent connecting rods 223.

[0107] In this embodiment, at the position where the main truss Y9 section of the petiole is connected to the blade root connection group 22, the two sides of the main truss Y9 section respectively extend outwardly with a push rod 25, and the push rod 25 is a triangular truss structure, and its head (the end away from the main truss 231) and tail are provided with rope seats. The aforementioned leaf ring rope 34 is connected between the head of the push rod 25 and the middle of the blade 31, preferably connected to the rope rod seat 372 between the Y3 section and the Y4 section of the blade. There are four leaf ring ropes 34, and two leaf ring ropes 34 are provided between the middle of each blade 31 and the head of the push rod 25. Since the length of the leaf ring rope 34 is relatively long, at least one stabilizing rope 36 is added between the leaf ring rope 34 and the blade 31. The aforementioned blade root ring rope 35 is connected between the head of the push rod 25 and the main truss 231, for example, connected between the adjacent Y9 section and Y10 section of the main truss 231.

[0108] like Fig.16 As shown in the figure: In this embodiment, the ring frame includes a short ring frame 27, a long ring frame 26 and a ring frame support 28. The long ring frame 26 and the short ring frame 27 are both arranged between adjacent petioles 23, and the short ring frame 27 is arranged close to the hub 21, and the long ring frame 26 is arranged away from the hub 21, and is connected to the middle position of the petiole 23. The long ring frame 26 and the short ring frame 27 are both truss structures, preferably truss structures with a quadrilateral cross section, and the long ring frame 26 and the short ring frame 27 are both connected to the main truss 231 of the petiole 23. The connection method is preferably flange connection, for example, a flange joint extends from the main truss 231 and is flange-connected to the rod body of the long ring frame and the short ring frame. The ring frame support 28 is connected between the long ring frame 26 and the petiole 23, and is provided with a plurality of support rods, some of which are connected between the long ring frame and the main truss 231 of the petiole 23, and the other support rods are connected between the long ring frame and the petiole 23 The large frame 232 of the petiole 23.

[0109] In this embodiment, the handle rope 24 includes a handle front rope 241, a handle frame rope 242, a handle long loop rope 243, a handle middle loop rope 244, a handle short loop rope 245, and a handle hub rope 246. Among them, the handle long loop rope 243 is connected between adjacent petioles 23, and the length of the handle long loop rope 243 is greater than the length of the long loop frame 26. For example, one end of the handle long loop rope 243 is connected to the node where a petiole main truss 231 is connected to the blade root connection group 22, where a rope seat is provided, and the other end is connected to the vicinity of the middle part of the main truss 231 of another petiole. The handle middle loop rope 244 is connected between adjacent petioles 23, and is close to the short loop frame 27 and is arranged on the outside of the short loop frame 27, that is, the length of the handle middle loop rope 244 is greater than the length of the short loop frame 27. The handle short loop rope 245 is connected between adjacent petioles 23, and is arranged between the short loop frame 27 and the hub 21. The handle hub rope 246 is connected between the wheel hub 21 and the petiole 23. The handle front rope 241 is connected between the handle large frame 232 and the handle small frame 233. The handle frame rope 242 is connected to the two ends of the inclined rod of the handle high frame 234, or connected between the Y12 section handle large frame and the Y14 section handle large frame.

[0110] Table 3 is a list of preferred parameters of the handle rope of this embodiment:

[0111] Table 3 Handle rope list

[0112]

[0113] In Table 3, the unit of size is mm and the unit of weight is kg. The "single branch" in Table 3 refers to the number of petioles corresponding to a single petiole.

[0114] Table 4 is a list of relevant parameters of important components of the handle wheel of this embodiment:

[0115] Table 4 Handle wheel list

[0116] name Single leaf weight kg Single unit weight kg Y9 3775 11325 Y10 3837 11511 Y11 3837 11511 Y12 3837 11511 Y13 7174 21522 Y14 5727 17181 small handle stand 2744 8232 Big handle stand 8234 24702 Elevated handle 2478.3 7435 Long ring stand 3407.5 10222.5 Short ring stand 1267.5 3802.5 Ring support 180.4 541.2 Handle rope 2245 6735 Screw Group 1552 4656 Wheels 7933.3 23800

[0117] In summary, the weight of the entire handle wheel of this embodiment is about 181.6t, including the weight of Y9-Y14 sections + blade root connection group + handle frame + handle rope; the weight of the entire stacked blade is about 66.4t, including the weight of Y1-Y8 sections + blade rope; the single stacked blade and the blade handle of the entire wind wheel are divided into 14 sections in total, the outer diameter of the wind wheel is about 322m, a 30MW generator is used, and the wind wheel sweep is 2.7m 2 / kw, blade sweeping air is 2.25m 2 / kw.

[0118] 3. Transportation methods of leaves and petioles

[0119] 3-1. Blade transportation

[0120] like Fig.19As shown: the blades of sections Y1 to Y8 are of equal length and are placed in a container by staggered arrangement. For example, every 5 sections of blades are staggered in one container. The width of the 5 sections of blades combined is 2438mm and the height is 3530m, which meets the container transportation standards. The entire wind wheel has a total of three groups of stacked blades, each group of stacked blades is divided into two layers of blades, and each blade is divided into 8 sections. Therefore, 10 containers are required for stacked blade transportation, which has high transportation efficiency and low transportation cost.

[0121] 3-2. Petiole transportation

[0122] like Fig. 20 As shown: a wind wheel is provided with three petioles in total, and the main truss 231 of each petiole is divided into sections Y9 to Y14, and each section is transported separately. Sections Y9 to Y12 require a total of 12 cabinets, and section Y13 requires 3 cabinets. The length of section Y14 is much shorter than other sections, and only one cabinet is required for the transportation of sections Y14 of three petioles. Among them, the maximum width of each cabinet of sections Y9 to Y12 is 2438mm, and the maximum height is 3338mm; the maximum width of the cabinet of section Y13 is 2508mm, and the maximum height is 3408mm; the maximum width of the cabinet of section Y14 is 2580mm, and the maximum height is 3604mm. The large handle frame 232, the small handle frame 233, and the high handle frame 234 are transported in a total of 9 cabinets.

[0123] Example 2

[0124] like Figures 21 to 23 As shown: The difference from Example 1 is that the structure of the blades is different.

[0125] Firstly, the blade skeleton 312 of the blade eliminates the side support rod 3125 , and a plurality of oblique support rods 3129 are provided on the ring rod 3123 between the tail rod 3121 and each middle rod 3122 .

[0126] Secondly, the upper blade body 3112 and the lower blade body 3113 both use a flat core plate, wherein the tail of the flat core plate of the lower blade body forms a tip, and the tip is formed by cutting the upper panel and part of the sandwich layer of the lower blade body short, so that an inclined surface is formed between the lower panel and the upper panel. The tail of the flat core plate of the upper blade body is also a tip, and the lower panel and part of the sandwich layer are cut short, so that an inclined surface is formed between the upper panel and the lower panel. The upper panel of the upper blade body extends toward the tip of the lower panel of the lower blade body, and is connected to the lower panel of the lower blade body to form a blade tip, and the connection is connected by full arc welding and glued at the connection.

[0127] Among them, the core layer of the upper blade body and the lower blade body adopts the core tube 9 at other positions except the tip; and the tip flat core rib 3116 is adopted at the tip, because the tip is an inclined surface and it is not easy to set the core tube. The tips of the upper blade body and the lower blade body are provided with a plurality of tip flat core ribs 3116 with decreasing heights successively, and the tip flat core rib 3116 is provided with a rib patch strip 3117 at the connection with the tip inclined surface; the rib patch strip 3117 is arranged parallel to the tip inclined surface and connected to each other through the silicone structural adhesive 3126. That is: the upper end and / or the lower end of the tip flat core rib 3116 in the upper blade body 3112 both extend a rib patch strip 3117 to one side, and the upper rib patch strip 3117 is glued and fixed to the upper panel extending from the upper blade body 3112; the lower rib patch strip 3117 is glued and fixed to the lower panel of the upper blade body 3112 or the upper panel of the lower blade body. Similarly, the upper end and / or lower end of the pointed flat core rib 3116 in the lower blade body 3113 also extends to one side to form a rib patch strip 3117 , which is glued and fixed to the upper panel of the upper blade body 3112 and the lower panel of the lower blade body 3113 .

[0128] In addition, an angle is formed between the upper panel of the lower blade body 3113 and the lower panel of the upper blade body 3112, and an angle is formed between the upper panel of the lower blade body 3113 and the upper panel of the upper blade body 3112, and the silicone structural adhesive 3126 is coated at the angle.

[0129] The other structures are the same as those in Example 1.

[0130] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A giant modular wind power system, comprising a wind rotor, wherein the wind rotor comprises at least two sets of laminated blades; characterized in that: Each set of stacked leaves includes at least two leaves arranged one above the other, and a truss structure is formed between the upper and lower leaves through a support body.

2. The giant modular wind power system according to claim 1, characterized in that: The upper and lower blades of the stacked leaves are arranged non-parallel, and the gap between the upper and lower blades gradually increases along the direction from the blade tip to the blade root of the stacked leaves.

3. The giant modular wind power system according to claim 1, characterized in that: The blade is divided into multiple sections along the length direction, and adjacent sections are connected with equal cross-sections; in each section of the blade, the same first angle of attack is maintained from the root to the middle of the blade, and the same second angle of attack is maintained from the middle to the tip of the blade, and the first angle of attack is greater than the second angle of attack; or the angle of attack of at least two adjacent sections of the blade located near the root of the blade is greater than the angle of attack of other sections; or each section of the blade maintains the same angle of attack, and the angle of attack is greater than 0°.

4. The giant modular wind power system according to claim 2, characterized in that: The support body comprises a plurality of support trusses, and the support trusses are arranged at both ends of the folded leaves and between adjacent sections.

5. The giant modular wind power system according to claim 1, characterized in that: The blade is divided into multiple sections along the length direction, and each section includes a blade core plate and a blade bone arranged in the blade core plate cavity; the blade core plate is divided into a blade head and a blade body along the width direction, the blade head includes an upper blade head and a lower blade head, and the blade body includes an upper blade body and a lower blade body. The upper and lower blade heads are connected to form an arc-shaped blade head, and the upper and lower blade bodies are connected to form a tip at the tail end; the blade bone includes a head rod, a tail rod and at least two middle rods, extending along the length direction of each section of the blade, wherein the two middle rods are respectively arranged at the upper joint and the lower joint of the blade head and the blade body, or at the upper and lower positions of the middle section of the blade head; the head rod is arranged at the joint of the upper blade head and the lower blade head, and the tail rod is arranged at the angle between the tail ends of the upper blade body and the lower blade body; ring rods are arranged between the head rod and each middle rod and between the tail rod and each middle rod; a middle support rod is arranged between the upper and lower middle rods.

6. The giant modular wind power system according to claim 5, characterized in that: The cross-sectional shape of the enclosed ring rod is the same as that of the blade core plate, and the ring rod and the blade core plate are fixed by rivets; or the ring rod and the inner wall of the blade core plate are glued and further fixed by rivets.

7. The giant modular wind power system according to claim 1, characterized in that: The blade is divided into a plurality of sections along the length direction, and inner blade ropes are arranged in at least two sections of the blade close to the blade tip.

8. The giant modular wind power system according to claim 1, characterized in that: The wind wheel also includes a handle wheel, which includes a hub, a blade root group, a petiole and a ring frame; the petiole is connected to the hub, and the blade root group is connected between the stacked blades and the petiole; the ring frame includes a short ring frame, a long ring frame and a ring frame support; the long ring frame and the short ring frame are both arranged between adjacent petioles, and the short ring frame is arranged close to the hub, and the long ring frame is arranged away from the hub; the ring frame support is arranged between the long ring frame and the petiole.

9. The giant modular wind power system according to claim 8, characterized in that: The petiole is a truss structure, and the petiole includes a main truss, a large handle frame, a small handle frame and a high handle frame; the main truss is divided into multiple sections along the length direction, and adjacent sections are flange-connected; the large handle frame and the small handle frame are connected to one side of the main truss, the small handle frame is connected to at least two sections close to the folded leaves, the large handle frame is connected to at least two sections close to the hub, and the height of the large handle frame is greater than that of the small handle frame; the high handle frame is connected to the side of the large handle frame away from the main truss.

10. The giant modular wind power system according to claim 9, characterized in that: The handle wheel also includes a handle rope, which includes a handle front rope, a handle frame rope, a handle long loop rope, a handle middle loop rope, a handle short loop rope, and a handle hub rope; the handle long loop rope is connected between adjacent petioles, and the length of the handle long loop rope is greater than the length of the long loop frame; the handle middle loop rope is connected between adjacent petioles, and is close to the short loop frame and is arranged on the outside of the short loop frame; the handle short loop rope is connected between adjacent petioles, and is arranged between the short loop frame and the hub; the handle hub rope is connected between the hub and the petiole; the handle front rope is connected between the handle large frame and the handle small frame; the handle frame rope is connected to the handle large frame or the handle high frame.

Images