A giant modular wind power system

Abstract

A kind of giant modular wind power system, including wind wheel, the wind wheel includes at least two groups of laminated leaves;Each group of laminated leaves includes at least two blades arranged in upper and lower, and the truss structure is formed between upper and lower blades by support body, so that it has more than 3 times bending resistance than single blade.The present application can greatly improve the strength, bending resistance and fatigue resistance of laminated leaves, even in strong wind, will not cause damage to laminated leaves, to protect the safety of the entire wind wheel and tower, reduce economic losses;Wind power system does not have to go up the mountain and go down the sea to generate green electricity everywhere in the world, when wind blade uses aluminum material, service life can reach at least 60 years, and can be recycled after abandonment, without polluting the environment;And all components can be shipped according to container size, global barrier-free, low-cost transportation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation technology, in particular to a giant modular wind power system. BACKGROUND

[0002] Wind power generation as a kind of renewable energy, because of its low carbon, clean characteristics and get widely used. However, the safety and stability of the impeller and tower of wind turbine under strong wind conditions has been a technical problem to be solved in the industry. Especially in extreme weather conditions, such as strong typhoon, wind load on wind power equipment increases significantly, resulting in equipment damage and safety hazards, such as blade breakage, tower fracture, etc., highlighting the limit challenge faced by the blade under strong wind.

[0003] The existing horizontal axis wind turbine, its wind wheel is usually provided with at least three groups of blades, and each group of blades is a single blade structure. The single blade structure has weak bending resistance and is prone to deformation when subjected to strong wind or sudden airflow. The bending and twisting of the blade can cause fatigue damage, accelerate the aging and failure of the blade. Since the wind wheel rotates at high speed, the blade will bear repeated bending stress, and the single structure blade is more prone to fatigue cracks, thereby affecting the overall stability and safety of the wind turbine. Especially in extreme weather conditions, fatigue problems will be more prominent. Once the blade cannot withstand the wind pressure, it is easy to break, and if the impact of the broken blade is large enough, it may cause the tower to tilt or completely collapse, especially in high wind speed or severe weather conditions, collapse will cause greater danger.

[0004] Therefore, it is urgent to design a new blade structure to improve the safety and reliability of the wind turbine. SUMMARY

[0005] The purpose of the present application is to overcome the above-mentioned deficiencies of 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 application is: a giant modular wind power system, comprising a wind wheel, the wind wheel comprising at least two groups of stacked leaves; each group of stacked leaves comprises at least two blades arranged above and below, and the upper and lower blades form a truss structure through a support body, so that the bending resistance is more than 3 times that of a single blade.

[0007] Further, the upper and lower blades of the stacked leaves are arranged non-parallelly, and the gap between the upper and lower blades gradually increases from the tip part to the root part of the stacked leaves.

[0008] Further, the blade is divided into multiple sections along the length direction, and the cross sections of the adjacent sections are connected; the attack angle of each section of the blade is kept the same from the blade root to the middle part of the blade, and kept the same from the middle part of the blade to the blade tip, and the attack angle of the first section is larger than that of the second section; or the attack angle of at least two adjacent sections near the blade root is larger than that of the other sections; or the attack angle of each section of the blade is kept the same, and the attack angle is larger than 0°.

[0009] Further, the support body comprises multiple support trusses, and the support trusses are arranged at both ends of the lamination and between the adjacent sections.

[0010] Further, the blade is divided into multiple sections along the length direction, and each section comprises a blade core plate and a blade rib 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 comprises an upper blade head and a lower blade head, the blade body comprises an upper blade body and a lower blade body, and the upper and lower blade heads form an arc-shaped blade head after being connected, and the upper and lower blade bodies form a tip at the tail end after being connected.

[0011] Further, the blade rib comprises a head rod, a tail rod and at least two middle rods, and extends along the length direction of each section of the blade, wherein the two middle rods are arranged at the upper joint and the lower joint of the blade head and the blade body, or are arranged at the upper position and the lower position 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 joint of the upper blade body and the lower blade body; a ring rod is 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 middle rod and the lower middle rod.

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

[0013] Further, the blade is divided into multiple sections along the length direction, and at least two sections of the blade near the blade tip are provided with an inner blade rope.

[0014] Further, the wind wheel further comprises a handle wheel, the handle wheel comprises a hub, a blade root connecting group, a blade handle and a ring support; the blade handle is connected with the hub, and the blade root connecting group is connected between the lamination and the blade handle; the ring support comprises a short ring support, a long ring support and a ring support brace; the long ring support and the short ring support are arranged between the adjacent blade handles, and the short ring support is arranged close to the hub, and the long ring support is arranged away from the hub; the ring support brace is arranged between the long ring support and the blade handle.

[0015] Further, the leaf stalk is a truss structure, and the leaf stalk comprises a main truss, a large stalk truss, a small stalk truss and a high stalk truss; the main truss is divided into multiple sections along the length direction, and flanges are connected between adjacent sections; the large stalk truss and the small stalk truss are connected to one side of the main truss, the small stalk truss is connected to at least two sections close to the stacked leaves, and the large stalk truss is connected to at least two sections close to the hub; the height of the large stalk truss is greater than that of the small stalk truss; and the high stalk truss is connected to the side of the large stalk truss away from the main truss.

[0016] Further, the handle wheel further comprises a handle rope, and the handle rope comprises 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 leaf stalks, and the length of the handle long loop rope is greater than that of the long loop frame; the handle middle loop rope is connected between adjacent leaf stalks and is arranged close to and outside the short loop frame; the handle short loop rope is connected between adjacent leaf stalks and is arranged between the short loop frame and the hub; the handle hub rope is connected between the hub and the leaf stalk; the handle front rope is connected between the large stalk truss and the small stalk truss; and the handle frame rope is connected to the large stalk truss or the high stalk truss.

[0017] The present application has the following beneficial effects:

[0018] (1) By designing the stacked leaves and combining the support body to form a truss structure, the stacked leaves have more than three times the bending resistance of a single blade, and the truss system can allow strong wind to pass through the gap between the stacked leaves to unload the wind pressure, thereby ensuring the strength of the blade and preventing fatigue and bending, greatly improving the stability and safety of the blade; even if strong wind is encountered, the stacked leaves will not be damaged, thereby protecting the safety of the entire wind wheel and tower and reducing economic losses; and the wind wheel can be designed to be larger;

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

[0020] (3) The blade is made of a core plate, has light weight and high strength, and a special leaf bone structure is designed in the leaf core plate, which can not only ensure the strength of the blade, but also facilitate the connection between adjacent sections of the blade; and the leaf bone, the support body and the leaf rope are connected as a whole, which can improve the overall strength, bending resistance and fatigue resistance of the stacked leaves;

[0021] (4) The structure of the leaf stalk is designed to greatly improve the strength and bending resistance of the leaf stalk; the long loop frame, the short loop frame and the loop frame support are arranged to improve the connection strength between adjacent leaf stalks and the stability of the entire wind wheel;

[0022] (5) The leaf rope and the handle rope are arranged to greatly improve the fatigue resistance of the entire wind wheel.

[0023] (6) wind power system does not have to go up the mountain and sea can be everywhere in the world to green electricity, when using 30MW, tower height 300 meters, annual power than short 1~2 times, pay period 3~4 times; When the wind blade using aluminum material, the life can reach at least 60 years, and can be recycled after the abandonment, will not pollute the environment; And all components can be shipped according to the size of the container, global barrier free, low cost transportation. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is the overall structure schematic diagram of wind power system of embodiment 1 of the present application;

[0025] Figure 2 is the structure schematic diagram of setting a group of stacked leaves of wind power system of embodiment 1 of the present application;

[0026] Figure 3 is the three-dimensional structure schematic diagram of stacked leaves of embodiment 1 of the present application;

[0027] Figure 4 is the combination structure schematic diagram of stacked leaves and petiole of embodiment 1 of the present application;

[0028] Figure 5 is the cross section schematic diagram of each section of double layer blade of embodiment 1 of the present application;

[0029] Figure 6 is the three-dimensional structure schematic diagram of support truss of embodiment 1 of the present application;

[0030] Figure 7 is the cross section schematic diagram of single blade of embodiment 1 of the present application;

[0031] Figure 8 is the connection structure schematic diagram of ring rod and leaf core plate of embodiment 1 of the present application;

[0032] Figure 9 is the split structure schematic diagram of leaf core plate of embodiment 1 of the present application;

[0033] Figure 10 is the tail connection structure schematic diagram of blade body of leaf core plate of embodiment 1 of the present application;

[0034] Figure 11 is the structure schematic diagram of first connecting head of embodiment 1 of the present application;

[0035] Figure 12 is the structure schematic diagram of second connecting head of embodiment 1 of the present application;

[0036] Figure 13 is the connection node schematic diagram of support truss of embodiment 1 of the present application;

[0037] Figure 14 is the angle of attack schematic diagram of each section blade of embodiment 1 of the present application;

[0038] Figure 15 This is a schematic diagram of the leaf rope in Embodiment 1 of the present invention;

[0039] Figure 16 This is a schematic diagram of the handle wheel in Embodiment 1 of the present invention (excluding the blade root assembly);

[0040] Figure 17 This is a schematic diagram of the petiole structure in Embodiment 1 of the present invention;

[0041] Figure 18 This is a schematic diagram of the connection structure of the leaf root assembly in Embodiment 1 of the present invention;

[0042] Figure 19 This is a schematic diagram of blade transportation according to Embodiment 1 of the present invention;

[0043] Figure 20 This is a schematic diagram of the petiole transportation in Embodiment 1 of the present invention;

[0044] Figure 21 This is a cross-sectional schematic diagram of a single blade in Embodiment 2 of the present invention;

[0045] Figure 22 yes Figure 21 A schematic diagram of the split structure of Embodiment 2 is shown;

[0046] Figure 23 yes Figure 21 The schematic diagram shows the blade tail connection structure of the blade core plate in Embodiment 2.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1. Wind turbine; 2. Handwheel; 3. Blades; 4. Tower; 5. Long curved frame; 6. Short curved 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. Support rod; 26. Long ring frame; 27. Short ring frame; 28. Ring frame support; 31. Blade; 32. Support truss; 33. Inner blade rope; 34. Blade ring rope; 35. Blade root ring rope; 36. Stabilizing rope; 37. First connector; 38. Second connector;

[0050] 221. Head and tail rings; 222. Crossbar; 223. Connecting rod; 224. Support rod; 231. Main truss; 232. Handle frame; 233. Handle subframe; 234. Handle upper frame; 241. Handle front rope; 242. Handle frame rope; 243. Handle long ring rope; 244. Handle middle ring rope; 245. Handle short ring rope; 246. Handle hub rope; 321. Chord; 322. Connecting rod; 311. Blade core plate; 312. Blade bone; 371. Rod seat; 372. Rope rod seat; 373. Joint;

[0051] 3110, upper head; 3111, lower head; 3112, upper body; 3113, lower body; 3114, arc core rib; 3115, flat core rib; 3116, tip flat core rib; 3117, rib patch; 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 core-pulling rivet; 3128, round head core-pulling rivet; 3129, inclined support rod. DETAILED DESCRIPTION

[0052] The application will be further described in detail below in conjunction with the accompanying drawings and specific examples.

[0053] Example 1

[0054] As shown in Figure 1 and Figure 2 : a giant modular wind power system, comprising a wind wheel 1, the wind wheel 1 comprising a handle wheel 2 and at least two groups of laminated blades 3 connected with the handle wheel 2, preferably three groups; each group of laminated blades 3 comprises double-layer blades 31 arranged in upper and lower layers, 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 the bending resistance 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 comprises a hub 21, a blade root connecting group 22, a blade handle 23, and a handle rope 24; the blade root connecting group 22 and the blade handle 23 correspond in number to the laminated blades 3, so that each group of laminated blades 3 is connected to the blade root connecting group 22 and the blade handle 23, and then connected to the hub 21 through the blade handle 23. The handle rope 24 has several roots, which are respectively connected between the related components of the handle wheel 2.

[0055] The modular wind power system of the embodiment is a horizontal axis wind turbine, the wind wheel 1 is connected to a generator through a main shaft, the generator is arranged on a base, the base is used for fixing a machine cabin and supporting the entire wind wheel 1, and the base is installed on a 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 application:

[0057] 1. Structure of laminated blades 3:

[0058] As shown in Figures 3-6As shown: in this embodiment, the double-layer blade 31 is segmented into multiple sections, sequentially divided into Y1-Y8 sections from the tip to the root, and the support body includes multiple support trusses 32, and the double-layer blade 31 is provided with a support truss 32 at both ends (the tip end of the Y1 section and the root end of the Y8 section) and between adjacent sections, thereby improving the strength and rigidity of the double-layer blade 31. Among them, the support truss 32 includes two chord bars 321 and at least two connecting rods 322 arranged between the chord bars 321, and the connecting rod 322 is a cross bar or an inclined bar. The chord bar 321 is welded or threadedly connected with the double-layer blade.

[0059] The double-layer blade of this embodiment is made of a core plate. The core plate includes 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 spaced core tubes 9, the upper and lower ends of the core tubes 9 are turned up and respectively connected with the face plate by brazing. A frame is arranged between the upper and lower face plates around the sandwich layer. 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 blade can adopt a segmented wind power generation blade and its transportation method disclosed in patent application No. 2023107312018, and the blade body thereof is used 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 arranged between the blade head and the blade body and between the blade body and the blade tip as a blade bone.

[0061] For another example, as shown in Figure 7 As shown: a new blade structure is designed in this embodiment, specifically: each section of Y1-Y8 of 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 form an arc-shaped blade head after being connected, and the upper and lower blade bodies form a sharp part at the tail end after being connected. The entire blade core plate is fixed by welding or glue riveting of 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 section of the blade. Among them, the two middle rods 3122 are respectively arranged at the upper joint and the lower joint of the blade head and the blade body, or are arranged 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; and the tail rod 3121 is arranged at the joint 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 blades. 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. Thus, multiple ring rods 3123 are combined to form a teardrop-shaped structure with the same cross-sectional shape as the blade 31, referred to as teardrop-shaped ring rods. Several teardrop-shaped ring rods are arranged at intervals along the length of each blade section 31 to enhance the strength of the blade 31. In addition, a middle support rod 3124 is provided between the upper and lower middle rods 3122 at the position of each teardrop-shaped ring rod, and several side support rods 3125 are provided between the head rod 3120 and the tail rod 3121. These can be vertical or diagonal rods, so that the entire blade rib 312 constitutes a truss structure.

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

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

[0066] (1) Leaf tip

[0067] like Figure 9 As shown: Both the upper blade head 3110 and the lower blade head 3111 are curved core plates. Since the entire sandwich layer of the curved core plate uses core tubes 9, the connection strength is easily reduced in areas with large curvature, and it is also difficult to process and manufacture. Therefore, when using a curved core plate, the sandwich layer in this embodiment preferably adopts a structure combining core ribs and core tubes 9. This is because the core ribs are single-plate structures, making it easy to design the curvature. When core ribs are placed in areas with large curvature, the connection strength can be improved, and the manufacturing is simple, but the strength is relatively poor. To improve the overall strength of the blade head, this embodiment places core tubes in areas where the curvature of the curved core plate is relatively gentle. This reduces the processing difficulty while ensuring overall strength. The structure of the blade head is described in detail below:

[0068] The arc-shaped core plates of the upper blade head 3110 and the lower blade head 3111 include a head section, a middle section, and a tail section. The head section has a larger curvature, therefore an arc-shaped core rib 3114 is installed within its core layer. The middle section is a transition section from the arc surface to the plane; the core layer of this section uses a structure combining a flat core rib 3115 and a core tube 9. The tail section has zero curvature, i.e., it is a plane section; therefore, the core layer of this section uses a core tube.

[0069] In the head section of the upper head 3110 and the lower head 3111, the arc core rib 3114 extends along the length direction of the panel, the connecting surface of 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 arranged on the panel surface of the arc core rib 3114 to strengthen the structure. The upper head 3110 and the lower head 3111 are connected into one through the frame. Among the upper head 3110 and the lower head 3111, the frame of one head is a long arc frame 5, and the frame of the other head is a short arc frame 6. The long arc frame 5 refers to the long edge along which the connecting surface with the corresponding head arc-shaped core panel is arc-shaped. Since both ends of the long arc frame 5 extend out of the edge, the long edge is arranged on the side away from the head rod 3120, that is, the side of the head of the head. A part of the long edge is welded to the arc-shaped core panel, and the other part extends out of the arc-shaped core panel. The main body of the long arc frame 5 is an inclined structure. The short arc frame 6 refers to the short edge along which the connecting surface with the corresponding head arc-shaped core panel is arc-shaped, and the short edge is integrally welded to the arc-shaped core panel. The panel of the arc-shaped core panel extends out of the short arc frame 6, and the extended part is connected to the part of the long edge of the long arc frame 5 extending out of the long edge along the arc-shaped core panel by using a countersunk core rivet 3127, so as to realize the connection between the upper head and the lower head. The main body of the short arc frame 6 is also an inclined structure. Preferably, the frame of the lower head 3111 is a long arc frame 5, and the frame of the upper head is a short arc frame 6. In addition, after the upper head and the lower head are connected into one, the upper head and the lower head are fixed by using structural glue to the head rod 3120, and the main body of the long arc frame 5 and the short arc frame 6 is further reinforced by using structural glue. The structural glue is preferably a silicone structural glue 3126.

[0070] In the middle section of the upper head 3110 and the lower head 3111, the arc surface at the front end is relatively flat, and a core pipe 9 is used to strengthen the strength. At least one flat core rib 3115 is arranged between the transition between the arc surface and the plane to play a transition role, and the rear part of the flat core rib 3115 uses a core pipe 9. The middle section and the middle rod 3122 are fixed by using a silicone structural glue 3126.

[0071] The tail sections of the upper blade head 3110 and the lower blade head 3111 are planar structures to facilitate connection with the planar core plate of the blade body. The core layers of the tail sections all employ spaced-apart core tubes 9. Specifically, the upper blade head 3110 has a long flat frame 7 at the end connected to the upper blade body 3112. The long flat frame 7 refers to a straight, long edge on the side connected to the planar core plate of the upper blade body, with a portion of the long edge welded to the arc-shaped core plate of the upper blade head 3110 and the other portion extending along the arc-shaped core plate. Similarly, the lower blade head 3111 also has a long flat frame 7 at the end connected to the lower blade body 3113; details are omitted here. In this embodiment, the arc-shaped core plate of the upper blade head 3110 has a short arc frame 6 at one end and a long flat frame 7 at the other end; while the arc-shaped core plate of the lower blade head 3111 has a long arc frame 5 at one end and a long flat frame 7 at the other end.

[0072] (2) Leaf body

[0073] like Figure 10 As shown: Both the upper blade 3112 and the lower blade 3113 use a single flat core plate. The tail of the flat core plate of the upper blade forms a pointed tip, which is formed by short-cutting the lower panel and part of the core layer of the upper blade, creating an inclined surface between the lower and upper panels. The tail of the flat core plate of the lower blade also forms a pointed tip, and it is formed by short-cutting the upper panel and part of the core layer, creating an inclined surface between the upper and lower panels. The lower panel of the lower blade extends towards the pointed tip of the upper panel of the upper blade, connecting with the upper panel of the upper blade to form a blade tip. The connection is achieved using a full-scale curved weld and then glued.

[0074] In this design, the core layer of both the upper and lower blades uses core tubes 9 at all locations except the tip; however, a pointed flat core rib 3116 is used at the tip because the tip is sloping and it is difficult to install a core tube there. Both the upper and lower blades have multiple pointed flat core ribs 3116 with progressively decreasing heights at their tips. A reinforcing strip 3117 is provided at the connection point between the pointed flat core rib 3116 and the sloping tip. The reinforcing strip 3117 is parallel to the sloping tip and interconnected with silicone structural adhesive 3126. Specifically, a reinforcing strip 3117 extends from the lower end of the pointed flat core rib 3116 within the upper blade 3112, and is glued to the lower panel extending from the lower blade 3113; a reinforcing strip 3117 extends from the upper end of the pointed flat core rib 3116 within the lower blade 3113, and is glued to the lower panel of the upper blade 3112.

[0075] In addition, an angle is formed between the upper panel of the lower blade 3113 and the lower panel of the upper blade 3112, and silicone structural adhesive 3126 is applied at the angle. A plate patch is provided on the outer side of the adhesive, and the ring rod located between the tail rod and the angle between the upper and lower blades is connected to the plate patch.

[0076] The upper blade body 3112 and the lower blade body 3113 are fixedly connected by silicone structural glue 3126.

[0077] The upper blade body 3112 and the lower blade body 3113 are provided with short flat frames 8 at the ends connected with 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 extend in the direction of the blade head along the short flat frames 8, and the extended part is connected with the part extended by the long flat frame 7 of the blade head by means of countersunk blind rivets 3127, and the corresponding long flat frame 7 and the short flat frame 8 are glued, so as to realize the connection between the blade head and the blade body.

[0078] The manufacturing method of the whole blade of the embodiment is as follows:

[0079] S1: glue riveting between the core plate frame of the upper blade head 3110 and the upper blade body 3112 is performed to form an upper blade core plate, and glue riveting between the core plate frame of the lower blade head 3111 and the lower blade body 3113 is performed to form a lower blade core plate;

[0080] S2: glue riveting between the upper blade core plate and each ring rod is performed, specifically, first, the ring rod is coated with glue, preferably 1mm silicone structural glue 3126, and then the upper blade core plate and the water drop-shaped ring rod are connected by rivets according to the riveting interval; similarly, glue riveting is also performed between the lower blade core plate and the water drop-shaped ring rod;

[0081] S3: the upper blade core plate, the lower blade core plate and the blade bone 312 are assembled;

[0082] Specifically, the blade bone 312 is first assembled and welded, that is, a plurality of middle support rods 3124 and a plurality of edge support rods 3125 are assembled and welded; then the upper blade core plate, the lower blade core plate and the blade bone 312 are fully coated with glue at the lap joint positions, and the upper blade core plate, the lower blade core plate and the blade bone 312 are spliced into a whole; then the ring rod is welded between the middle rod, the head rod and the tail rod, and the middle rod, the head rod and the tail rod are glued at the connection with the core plate; finally, the upper blade core plate and the lower blade core plate are riveted together at the blade head to form a certain section of the blade.

[0083] S4: the inner rope 33 in the Y1-Y4 section blade is tensioned.

[0084] The following is a preferred embodiment for connecting adjacent sections of the blade of the embodiment:

[0085] The adjacent sections of the blade 31 are connected by equal cross sections, and the blade bones 312 of the adjacent sections are connected by connecting heads. For example, the head rod, the tail rod and the middle rod are threadedly connected by threaded connecting heads, or the connecting heads are sleeved on the rod bodies of the adjacent sections and then welded. In addition, if a rope is needed to be arranged at this position, a rope rod seat is arranged at one end of the connecting head.

[0086] For example, as shown in Figure 11 and Figure 13 : a first connecting head 37 is arranged between Y1 and Y2, between Y2 and Y3, and between Y3 and Y4, the first connecting head 37 includes two rod seats 371 at both ends, two rope rod seats 372 extending forward and backward from the rod seats 371 at both ends, and a connecting head 373 extending upward from the first connecting head 37, the connecting end of the connecting head 373 is a flange structure. The head rod or tail rod of the adjacent section respectively extends into the rod seat 371 at both ends and is fixed, 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 connecting piece is arranged at the end of the inner blade rope 33 to facilitate threaded connection with the rope rod seat. The connecting head 373 is used to connect one end of the chord 321 of the support truss 32, the connecting head 373 is a threaded structure, and the end of the chord 321 is also provided with a flange corresponding to the flange connection of the connecting head 373. It can be understood that for other sections without inner blade ropes, the rope rod seat can be cancelled.

[0087] As shown in Figure 12 : the middle rods 3122 of each section Y1-Y8 are connected by a second connecting head 38, the difference between the second connecting head 38 and the first connecting head 37 is that the second connecting head 38 is less than the first connecting head 37 by two rope rod seats 372 and a connecting head 373, and the other structures are similar or the same. The rod seat at both ends of the second connecting head 38 is used to connect the middle rod of the adjacent section.

[0088] In addition, since the outer part between Y4 and Y5 sections needs to be connected with the blade ring rope 34, the connecting head between the two adjacent sections can be provided with rope rod seats in different directions to connect the inner blade rope 33 and the blade ring rope 34.

[0089] Table 1 is a list of preferred parameters of the blade of the embodiment:

[0090] Table 1 Related parameters of the blade

[0091]

[0092] In Table 1, the weight unit is kg, and the size unit is mm. The edge rod in Table 1 refers to the head rod and the tail rod; the material of the core plate of the embodiment is preferably aluminum, the total weight of the core plate is 9776 kg, and the total weight of the blade bone is 10719.4 kg (including the weight of the connecting head not shown in Table 1). It can be understood that the above is only a preferred parameter of the embodiment, and does not limit the present application.

[0093] In this embodiment, the upper and lower blades 31 of the double-layer blade 31 are not arranged in parallel. For example, both upper and lower blades 31 are arranged at an angle, or one blade 31 is arranged horizontally and the other blade 31 is arranged at an angle. 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 gradually increases in the direction from Y1 to Y8.

[0094] like Figure 14 As shown: In this embodiment, each segment of the blade 31 of the stacked blade 3 maintains the same angle of attack, for example, the angle of attack of segments Y1 to Y8 is 4°.

[0095] It is understood that in this embodiment, the blades 31 of each segment of the stacked leaf 3 can also maintain the same first angle of attack from the leaf root to the leaf middle, and the same second angle of attack from the leaf middle to the leaf tip, with the first angle of attack being greater than the second angle of attack. For example, segments Y6 to Y8 maintain the same first angle of attack of 4.3°; segments Y1 to Y5 maintain the same second angle of attack of 3°.

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

[0097] Specifically, the inner blade rope 33 includes inner blade ropes Y1, Y2, Y3, and Y4. Sections Y5 to Y8 may not have inner blade ropes. In sections Y1 to Y4, each section has four inner blade ropes 33. The four inner blade ropes of section Y1 are connected between the rope holder at the blade tip and the rope holder at the joint of section Y1-Y2. The four inner blade ropes of section Y2 are connected between the rope holder at the joint of section Y1-Y2 and the rope holder 372 at the joint of section Y2-Y3, and so on. Two of the four inner blade ropes in each section are connected in a crisscross pattern, and the other two are connected horizontally. The blade ring rope 34 and blade root ring rope 35 are connected between the stacked blade 3 and the shank wheel 2, while the stabilizing rope 36 is connected between the blade ring rope 34 and the stacked blade 3.

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

[0099] Table 2 List of Leaf Ropes

[0100]

[0101] In Table 2, the unit of measurement is mm and the unit of weight is kg.

[0102] 2. Structure of the shank wheel:

[0103] like Figure 16As shown in the figure, in this embodiment, the handle wheel 2 comprises a hub 21, a blade root connecting group 22, a blade handle 23, a ring frame and a handle rope 24. The blade handle 23 is connected to the hub 21, the blade root connecting group 22 is connected between the stacked blade 3 and the blade handle 23, and the handle rope 24 is used to improve the fatigue resistance of the entire handle wheel 2.

[0104] Specifically, as Figure 17 As shown in the figure, in this embodiment, the number of blade handles 23 corresponds to the number of groups of stacked blades 3, that is, one group of stacked blades 3 corresponds to one blade handle 23. Among them, the blade handle 23 comprises a main truss 231, a large handle truss 232, a small handle truss 233 and a high handle truss 234. Among them, the main truss 231 is preferably a truss structure with a quadrilateral cross-sectional shape, which is divided into multiple sections along the length direction, including Y9-Y14 sections, the Y9 section is connected to the blade root connecting group 22, the Y14 section is connected to the hub 21, and the flanges are connected between adjacent sections. The large handle truss 232 and the small handle truss 233 are connected to the front surface position of the main truss 231, wherein the small handle truss 233 is connected to the Y9-Y11 sections, the large handle truss 232 is connected to the Y12-Y14 sections, the height of the large handle truss 232 is greater than that of the small handle truss 233, and the high handle truss 234 is connected above the large handle truss 232.

[0105] Preferably, the cross-sectional shape of each face of the small handle truss 233 and the large handle truss 232 is triangular. By setting the large handle truss 232 and the small handle truss 233, the strength and rigidity of the main truss 231 can be enhanced, so that the blade is not easy to break even in strong wind. The large handle truss 232 and the small handle truss 233 are respectively flange-connected with the main chord of the main truss 231. The main truss 231, the large handle truss 232 and the small handle truss 233 are all composed of hollow tubes into a truss structure, and flange plates are arranged at the connection nodes of the hollow tubes for flange connection. One end of the small handle truss 233 is connected to the blade root connecting group 22, and the other end is connected to one end of the large handle truss 232, and the other end of the large handle truss 232 is connected to the hub 21. The high handle truss 234 comprises a vertical rod connected to the large handle truss, an inclined rod connected between the vertical rod and the large handle truss, and a support rod connected between the inclined rod and the large handle truss. By adding the high handle truss 234 to the large handle truss 232, the rigidity and strength of the blade handle can be further improved, especially the strength of the connection between the blade handle and the hub.

[0106] As Figure 18As shown: In this embodiment, the blade root assembly 22 is a truss structure, including two head and tail ring rods 221 respectively connected to the double-layer blades 31, two crossbars 222 connecting the two head and tail ring rods 221, and several connecting rods 223 connected to the main truss Y9 section and the handle frame 233. The head and tail ring rods 221 are adapted to the teardrop-shaped ring rods of the blade 312, and are threaded or welded to the head rod 3120, tail rod 3121, and middle rod 3122 of the blade 312 via multiple connectors. One crossbar 222 is welded to the head of the two head and tail ring rods 221, and another crossbar 222 is welded to the tail of the two head and tail ring rods 221; multiple vertical and diagonal rods are provided between adjacent crossbars 222. There are at least five connecting rods 223, four of which are used to connect the flanges to the four main chords of the main truss 231, and at least one connecting rod 223 is used to connect the handle bracket 233. A support rod 224 is provided between adjacent connecting rods 223.

[0107] In this embodiment, near the connection point with the blade root assembly 22, the main truss Y9 section of the blade stem has outward extending rods 25 on both sides. The rods 25 are triangular truss structures, with rope seats at both their head (the end furthest from the main truss 231) and tail. The aforementioned blade loop ropes 34 connect the head of the rod 25 to the middle of the blade 31, preferably to the rope seat 372 between sections Y3 and Y4 of the blade. There are four blade loop ropes 34, with two between the middle of each blade 31 and the head of the rod 25. Due to the relatively long length of the blade loop ropes 34, at least one additional stabilizing rope 36 is added between the blade loop ropes 34 and the blade 31. The aforementioned blade root loop ropes 35 connect the head of the rod 25 to the main truss 231, for example, between adjacent sections Y9 and Y10 of the main truss 231.

[0108] like Figure 16 As shown: In this embodiment, the ring frame includes a short ring frame 27, a long ring frame 26, and a ring frame support 28. Both the long ring frame 26 and the short ring frame 27 are located between adjacent blade stalks 23, with the short ring frame 27 positioned closer to the hub 21 and the long ring frame 26 positioned further away from the hub 21, connected to the middle of the blade stalk 23. Both the long ring frame 26 and the short ring frame 27 are truss structures, preferably quadrilateral truss structures, and both are connected to the main truss 231 of the blade stalk 23. The preferred connection method is flange connection, for example, a flange joint extending from the main truss 231, connecting to the flanges of the long and short ring frames. The ring frame support 28 connects the long ring frame 26 and the blade stalk 23, and is provided with several support rods. Some support rods connect the long ring frame to the main truss 231 of the blade stalk 23, while others connect the long ring frame to the main frame 232 of the blade stalk 23.

[0109] In this embodiment, the handle rope 24 includes a front handle rope 241, a handle frame rope 242, a long handle loop rope 243, a middle handle loop rope 244, a short handle loop rope 245, and a hub rope 246. The long handle loop rope 243 connects adjacent leaf petioles 23, and its length is greater than the length of the long loop frame 26. For example, one end of the long handle loop rope 243 is connected to the node where the main truss 231 of one leaf petiole connects to the leaf root assembly 22, where a rope seat is provided; the other end is connected to the vicinity of the middle part of the main truss 231 of another leaf petiole. The middle handle loop rope 244 connects adjacent leaf petioles 23, is close to the short loop frame 27, and is located on the outside of the short loop frame 27; that is, the length of the middle handle loop rope 244 is greater than the length of the short loop frame 27. The short handle loop rope 245 connects adjacent leaf petioles 23 and is located between the short loop frame 27 and the hub 21. The hub rope 246 connects the hub 21 and the blade stalk 23. The front rope 241 connects the main shaft 232 and the secondary shaft 233. The shaft frame rope 242 connects to both ends of the diagonal bar of the upper shaft 234, or connects to the Y12 section of the main shaft and the Y14 section of the main shaft.

[0110] Table 3 lists a preferred parameter list for the handle rope in this embodiment:

[0111] Table 3 List of Handle Cords

[0112]

[0113] In Table 3, dimensions are in mm and weight is in kg. "Single" in Table 3 refers to the number of petioles corresponding to a single petiole.

[0114] Table 4 lists the relevant parameters of the important components of the shank wheel in this embodiment:

[0115] Table 4. List of Tumblers

[0116] Name Single blade 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 Large handle stand 8234 24702 Handle height stand 2478.3 7435 Long ring stand 3407.5 10222.5 Short ring stand 1267.5 3802.5 Ring stand support 180.4 541.2 Handle rope 2245 6735 Screw group 1552 4656 Hub 7933.3 23800

[0117] In summary, the weight of the entire rotor in this embodiment is approximately 181.6t, including the weight of sections Y9 to Y14, the blade root assembly, the rotor frame, and the rotor rope; the weight of the entire stacked blades is approximately 66.4t, including the weight of sections Y1 to Y8 and the blade rope; the entire wind turbine consists of 14 sections in total, with an outer diameter of approximately 322m. It uses a 30MW generator and has a turbine sweep length of 2.7m. 2 / kW, blade sweeping is 2.25m 2 / kw.

[0118] 3. Transport methods of leaf blades and petioles

[0119] 3-1. Blade Transportation

[0120] like Figure 19As shown: the blades of sections Y1 to Y8 are of equal length and are placed in a staggered arrangement within the container. For example, five blades are staggered within one container. The width of the five blades combined is 2438mm, and the height is 3530mm, which meets the container transport standards. The entire wind turbine has three sets of stacked blades, each set consisting of upper and lower layers of blades. Each blade is divided into eight sections. Therefore, transporting the stacked blades requires only 10 containers, resulting in high transport efficiency and low transport costs.

[0121] 3-2. Petiole transport

[0122] like Figure 20 As shown: A wind turbine has three blades. The main truss 231 of each blade is divided into sections Y9 to Y14, each transported separately. Sections Y9 to Y12 require 12 containers, section Y13 requires 3 containers, while section Y14 is much shorter than the other sections, requiring only 1 container for transport. The maximum width of each container for sections Y9 to Y12 is 2438mm, and the maximum height is 3338mm; the maximum width of the Y13 container is 2508mm, and the maximum height is 3408mm; the maximum width of the Y14 container is 2580mm, and the maximum height is 3604mm. The main truss 232, the secondary truss 233, and the upper truss 234 are transported in 9 containers.

[0123] Example 2

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

[0125] First, the blade rib 312 eliminates the side strut 3125, and multiple diagonal support rods 3129 are provided on the ring rod 3123 between the tail rod 3121 and each middle rod 3122.

[0126] Secondly, both the upper blade 3112 and the lower blade 3113 use a single flat core plate. The lower blade's flat core plate has a pointed tail, which is formed by short-cutting the upper panel and part of the core layer, creating an inclined surface between the upper and lower panels. The upper blade's flat core plate also has a pointed tail, which is also formed by short-cutting the lower panel and part of the core layer, creating an inclined surface between the upper and lower panels. The upper panel of the upper blade extends towards the pointed tip of the lower panel of the lower blade, connecting with the lower panel of the lower blade to form a blade tip. The connection is achieved using a full-scale curved weld and then glued.

[0127] The core layer of the upper blade body and the lower blade body is provided with the core tube 9 at other positions except the tip, and the tip is provided with the tip flat core bar 3116 because the tip is inclined and it is difficult to arrange the core tube. The tip of the upper blade body and the lower blade body is provided with a plurality of tip flat core bars 3116 with decreasing height, and the tip flat core bar 3116 is provided with a bar patch 3117 at the connection with the tip inclined surface. The bar patch 3117 is arranged parallel to the tip inclined surface and is connected to each other by the silicone structural adhesive 3126. That is, the upper end and / or the lower end of the tip flat core bar 3116 in the upper blade body 3112 extends to one side to form the bar patch 3117, the bar patch 3117 at the upper end is glued and fixed to the upper panel extended from the upper blade body 3112, and the bar patch 3117 at the lower end 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 the lower end of the tip flat core bar 3116 in the lower blade body 3113 also extends to one side to form the bar patch 3117, and the bar patch 3117 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, the upper panel of the lower blade body 3113 and the lower panel of the upper blade body 3112 form an included angle, and the upper panel of the lower blade body 3113 and the upper panel of the upper blade body 3112 form an included angle, and the silicone structural adhesive 3126 is coated at the included angle.

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

[0130] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A mega modular wind power system comprising a rotor, said rotor comprising at least two groups of vanes; characterized in that, Each group of the stacked blades comprises at least two blades arranged in an up-down manner, and a truss structure is formed between the up-down blades by the support body; The blade is divided into multiple sections along the length direction, each section comprises 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 comprises an upper blade head and a lower blade head, the blade body comprises 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 pointed part at the tail end; the blade bone comprises a head rod, a tail rod and at least two middle rods, which extend along the length direction of each section of the blade, wherein the two middle rods are arranged at the upper and lower joints of the blade head and the blade body, or arranged 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 joint of the upper blade body and the lower blade body; a ring rod is 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; The wind wheel further comprises a handle wheel, the handle wheel comprises a hub, a blade root connecting group, a handle and a ring support; the handle is connected to the hub, and the blade root connecting group is connected between the stacked blade and the handle; the ring support comprises a short ring support, a long ring support and a ring support support; the long ring support and the short ring support are arranged between adjacent handles, and the short ring support is arranged close to the hub, and the long ring support is arranged away from the hub; the ring support support is arranged between the long ring support and the handle; The handle is a truss structure, and the handle comprises a main truss, a large handle, a small handle and a high handle; the main truss is divided into multiple sections along the length direction, and the adjacent sections are connected by flanges; the large handle and the small handle are connected to one side of the main truss, the small handle is connected to at least two sections close to the stacked blade, the large handle is connected to at least two sections close to the hub, and the height of the large handle is greater than that of the small handle; the high handle is connected to the side of the large handle away from the main truss.

2. The gigamodular wind power system of claim 1, wherein, The upper and lower blades of the stacked blade are arranged in a non-parallel manner, and the gap between the upper and lower blades gradually increases from the blade tip part to the blade root part of the stacked blade.

3. The gigamodular wind power system of claim 1, wherein, The blade is divided into multiple sections along the length direction, and the adjacent sections of the blade are connected by equal cross sections; in each section of the blade, the same first attack angle is maintained from the blade root part to the middle part of the blade, the same second attack angle is maintained from the middle part of the blade to the blade tip part, and the first attack angle is greater than the second attack angle; or the attack angles of at least two adjacent sections of the blade near the blade root part are greater than those of other sections; or each section of the blade maintains the same attack angle, and the attack angle is greater than 0°.

4. The gigamodular wind power system of claim 2, wherein, The support body comprises multiple support trusses, and the support trusses are arranged at both ends of the stacked blade and between adjacent sections.

5. The gigamodular wind power system of claim 1, wherein, The cross-sectional shape of the ring rod after being enclosed 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.

6. The gigamodular wind power system of claim 1, wherein, The blade is divided into multiple sections along the length direction, and at least two sections of the blade near the blade tip part are provided with an inner blade rope.

7. The gigamodular wind power system of claim 1, wherein, The handle wheel further comprises handle ropes, which include handle front ropes, handle frame ropes, handle long ring ropes, handle middle ring ropes, handle short ring ropes and handle hub ropes; the handle long ring ropes are connected between adjacent leaf handles, and the length of the handle long ring ropes is greater than the length of the long ring frame; the handle middle ring ropes are connected between adjacent leaf handles, and are close to the short ring frame and arranged outside the short ring frame; the handle short ring ropes are connected between adjacent leaf handles, and are arranged between the short ring frame and the wheel hub; the handle hub ropes are connected between the wheel hub and the leaf handles; the handle front ropes are connected between the handle large frame and the handle small frame; and the handle frame ropes are connected on the handle large frame or the handle high frame.

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