A fast assembly segmented wind turbine blade

Abstract

The application provides a segmented wind turbine blade and a connecting device, which can be quickly assembled. The wind turbine blade comprises a root section, a middle section and a tip section. The root section is provided with a reinforcing member on the side away from the middle section. Support rings are uniformly and separately fixed to the inner walls of the root section, the middle section and the tip section. Web beams are arranged between the adjacent support rings. The root section, the middle section and the tip section are composed of multiple blade sections. The adjacent blade sections are connected by the connecting device. The outer surface of the connecting device is covered with sealing plates on the upper and lower sides. The sealing plates are fixed to the blade sections by screws. The application can be quickly installed and accurately docked on site, improves the installation efficiency and saves transportation costs.

Description

Technical Field

[0001] This invention belongs to the field of wind turbine technology, specifically relating to a segmented wind turbine blade that can be assembled quickly. Background Technology

[0002] Wind turbine blades are a crucial component of wind turbine generators, responsible for converting wind energy into mechanical energy. They are typically made of high-strength, lightweight composite materials, and their design resembles an aircraft airfoil to maximize wind energy capture. The blades rotate to convert wind energy into mechanical energy, which is then converted into electrical energy by the generator. Existing large wind turbine blades are typically 80m-120m in length. Integral blades are costly to transport, assemble on-site, and maintain, and are severely limited by road conditions. Segmented blades, on the other hand, are often assembled manually using numerous bolts or adhesives, resulting in low efficiency, large errors, and stringent requirements for the on-site environment.

[0003] In view of this, in order to solve the above-mentioned technical problems, the present invention proposes a segmented wind turbine blade that can be quickly installed and accurately connected on site, improving installation efficiency and saving transportation costs. Summary of the Invention

[0004] This invention provides a segmented wind turbine blade that can be quickly assembled, enabling rapid on-site installation and precise alignment, improving installation efficiency, and saving transportation costs. The specific solution is as follows:

[0005] A segmented wind turbine blade for rapid assembly, comprising a root section, a middle section, and a tip section. A reinforcing member is provided on the side of the root section away from the middle section. Support rings are uniformly spaced and fixedly connected along the inner wall of each of the root, middle, and tip sections. A web beam is provided between adjacent support rings. Each of the root, middle, and tip sections is composed of multiple blade segments. Adjacent blade segments are connected by connecting devices. The outer surface of the connecting device is covered with sealing plates of the same shape as the blade segments on both the upper and lower sides. The sealing plates are fixed to the blade segments at both ends by screws.

[0006] The connecting device includes two symmetrically arranged prefabricated connecting frames. The structure of the prefabricated connecting frames matches the side of the blade segment. Multiple fixing rods are connected between the two prefabricated connecting frames along their outer sides at intervals. Each of the two prefabricated connecting frames has a limiting ring that can extend into the blade segment on its opposite side. The outer shape of the limiting ring matches the inner shape of the blade segment. A mounting ring that can be fitted onto the outer side of the limiting ring is fixedly connected inside the blade segment corresponding to the limiting ring. The outer side of the limiting ring and the inner side of the mounting ring are tightly fitted together. The mounting ring is provided with a locking mechanism for locking the limiting ring.

[0007] The locking mechanism includes a return spring, a fixing ring, and a locking block. The mounting ring has multiple blind grooves spaced apart along its inner side. Each of the multiple blind grooves has a return spring fixedly installed in one of the multiple blind grooves. Each of the multiple return springs has a fixing ring near one end of the limiting ring. Each of the multiple fixing rings has a locking block fixedly connected to one end of the limiting ring. The outer side of the limiting ring corresponding to the locking block has a locking groove suitable for matching the locking block.

[0008] Furthermore, the two prefabricated connecting frames have multiple through holes spaced apart along their circumference on the side of the blade segment, and bolt holes are provided on the side wall of the blade segment corresponding to the through holes. The prefabricated connecting frames are fixed to the side of the blade segment by reinforcing bolts.

[0009] Furthermore, a spring guide rod is fixedly connected to one end of the fixed ring away from the locking block, and the return spring is sleeved on the outside of the spring guide rod, with the length of the spring guide rod being one-third of the length of the return spring.

[0010] Furthermore, multiple locking blocks are beveled on the side facing the prefabricated connecting frame.

[0011] Furthermore, the reinforcement includes a threaded cylinder, which is coaxially arranged with the blade root section. Multiple reinforcing rods are evenly spaced along the circumference between the threaded cylinder and the blade root section. A threaded post is matched inside the threaded cylinder, and a mounting plate is fixedly connected to the end of the threaded post. A flange that fits against the mounting plate is fixedly welded to the outer circumference of the end of the blade root section. The mounting plate and the flange are respectively provided with through holes that allow bolts to pass through evenly spaced along their circumference and are connected by bolts.

[0012] Furthermore, a groove is provided in the middle of the end of the mounting plate away from the threaded post, and a knob block is welded in the groove.

[0013] Furthermore, windward grooves are formed on the windward surfaces of multiple blade segments along their length.

[0014] The beneficial effects of this invention are:

[0015] This invention discloses a segmented wind turbine blade for rapid assembly. By designing the root section, middle section, and tip section as structures composed of multiple blade segments, space can be saved during transportation, significantly reducing transport volume and saving transportation costs. Through the inclusion of a connecting device, and the use of limiting rings and mounting rings at both ends of the connecting device, along with its internal locking mechanism, the connecting device can be directly aligned with the ends of the blade segments and inserted into the segments during installation. This avoids the inefficiency caused by numerous connecting bolts in existing technologies, thereby achieving rapid on-site installation and precise alignment of the blade, improving installation efficiency. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the segmentation of adjacent two blades according to the present invention.

[0017] Figure 2 This is a schematic diagram showing the connection between the blade segmentation and the locking mechanism of the present invention.

[0018] Figure 3 This is a schematic diagram of the connecting device structure of the present invention.

[0019] Figure 4 This is a partial cross-sectional view of the connecting device of the present invention.

[0020] Figure 5 This is a sectional view of the blade segment of the present invention.

[0021] Figure 6 This is a schematic diagram of the locking mechanism of the present invention.

[0022] Figure 7 This is a schematic diagram of the reinforcement structure of the present invention.

[0023] Explanation of reference numerals in the attached drawings: 1. Reinforcing component; 101. Threaded cylinder; 102. Reinforcing rod; 103. Threaded column; 104. Mounting plate; 105. Knob block; 2. Support ring; 3. Web beam; 4. Blade segment; 5. Connecting device; 5. Prefabricated connecting frame; 501. Fixing rod; 502. Limiting ring; 503. Locking mechanism; 504. Connecting ring; 505. Return spring; 5041. Fixing ring; 5042. Locking block; 5043. Spring guide rod; 5044. Sealing plate; 6. Mounting ring; 7. Connecting groove; 8. Reinforcing bolt; 9. Windward groove; 10. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] See Figure 1-7A segmented wind turbine blade for rapid assembly is disclosed. The wind turbine blade includes a root section, a mid section, and a tip section. A reinforcement member 1 is provided on the side of the root section away from the mid section. The reinforcement member 1 is provided to enhance the stiffness of the root section. Support rings 2 are fixedly connected at even intervals along the inner wall of the root section, mid section, and tip section. A web beam 3 is provided between adjacent support rings 2. The web beam 3 is provided to enhance the rigidity of the root section, mid section, and tip section. The root section, mid section, and tip section are each composed of multiple blade segments 4. The structure of the middle section and the tip section being composed of multiple blade segments 4 can significantly reduce the transport volume and save on transport costs. Adjacent blade segments 4 are connected by connecting devices 5. The upper and lower sides of the outer surface of the connecting device 5 are covered with sealing plates 6 that are the same shape as the blade segments 4. The two ends of the blade segments 4 are respectively provided with a stepped groove with a depth of the same as the thickness of the sealing plate 6. That is, the outer surface of the sealing plate 6 and the outer surface of the blade segments 4 are on the same plane. The two ends of the sealing plate 6 are fixed to the blade segments 4 by screws.

[0026] The preferred connecting device 5 includes two symmetrically arranged prefabricated connecting frames 501. The structure of the prefabricated connecting frames 501 matches the side surface of the blade segment 4. The outer peripheral surface of the prefabricated connecting frame 501 is aligned with the trapezoidal groove surface of the blade segment 4. Multiple fixing rods 502 are spaced apart between the two prefabricated connecting frames 501 along their outer surfaces. Limiting rings 503 that can extend into the blade segment 4 are respectively provided on the opposite sides of the two prefabricated connecting frames 501. The outer shape of the limiting ring 503 matches the inner shape of the blade segment 4. The blade segment 4 corresponding to the limiting ring 503... An internally fixed mounting ring 7 is provided, which can be fitted onto the outer side of the limiting ring 503. The mounting ring 7 is designed to increase the hardness and thickness of the end of the blade segment 4. The outer side of the limiting ring 503 is tightly fitted with the inner side of the mounting ring 7. The mounting ring 7 is provided with a locking mechanism 504 for locking the limiting ring 503. Specifically, when two adjacent blade segments 4 are connected, one end of the connecting device 5 is inserted into the blade segment 4 and locked by the locking mechanism 504 to complete the fixed connection of the two adjacent blade segments 4. The operation is convenient and quick, greatly improving the installation efficiency.

[0027] The preferred locking mechanism 504 includes a return spring 5041, a retaining ring 5042, and a locking block 5043. The mounting ring 7 has multiple blind grooves spaced apart along its inner side. Each blind groove contains a return spring 5041, and each return spring 5041 has a retaining ring 5042 near one end of the limiting ring 503. The blind groove has a cross-shaped cross-section, and the retaining ring 5042 is located inside the blind groove. Each retaining ring 5042 is fixedly connected to a locking block 5043 near one end of the limiting ring 503. The limiting ring 503, corresponding to the locking block 5043, has appropriate... The locking groove matches the locking block 5043; specifically, when two adjacent blade segments 4 are connected and installed, the limiting ring 503 at the end of the prefabricated connecting frame 501 is inserted into the mounting ring 7. At this time, the locking groove on the limiting ring 503 moves along the direction of the locking block 5043. When the locking groove is opposite to the locking block 5043, the locking block 5043 can be inserted into the locking groove to complete the limiting and locking. At this time, part of the locking block 5043 is inserted into the locking groove, and the other part is located in the blind groove of the mounting ring 7. At the same time, the end of the prefabricated connecting frame 501 abuts against the end of the blade segment 4. This operation is simple and can quickly complete the docking installation.

[0028] The two prefabricated connecting frames 501 preferably have multiple through holes spaced apart along their circumference on the side of the blade segment 4. Bolt holes are provided on the side wall of the blade segment 4 corresponding to the through holes. The prefabricated connecting frames 501 are fixed to the side of the blade segment 4 by reinforcing bolts 9. The setting of reinforcing bolts 9 can further enhance the firmness between the connecting device 5 and the blade segment 4. Preferably, there are 5 reinforcing bolts 9, with two on each of the upper and lower sides of the prefabricated connecting frame 501 and one on the rear side.

[0029] The preferred fixing ring 5042 is fixedly connected to a spring guide rod 5044 at one end away from the locking block 5043. The return spring 5041 is sleeved on the outside of the spring guide rod 5044, and the length of the spring guide rod 5044 is one-third of the length of the return spring 5041. The setting of the spring guide rod 5044 helps to enhance the stability of the return spring 5041 during the movement process.

[0030] The preferred locking blocks 5043 are provided with chamfered structures on the side facing the prefabricated connecting frame 501. The chamfered structure facilitates better insertion of the locking blocks 5043 into the locking groove to complete the locking.

[0031] The preferred reinforcement component 1 includes a threaded cylinder 101, which is coaxially arranged with the blade root section. Multiple reinforcing rods 102 are evenly spaced along the circumference between the threaded cylinder 101 and the blade root section. A threaded post 103 is matched inside the threaded cylinder 101. A mounting plate 104 is fixedly connected to the end of the threaded post 103. A flange that fits against the mounting plate 104 is fixedly welded to the outer circumference of the end of the blade root section. The mounting plate 104 and the flange are respectively provided with through holes that allow bolts to pass through evenly spaced along their circumference and are connected by bolts. During installation, the threaded post 103 is screwed into the threaded cylinder 101. The installation is complete when the through holes on the mounting plate 104 correspond to the through holes on the flange. The reinforcement component 1 is designed to enhance the strength of the blade root section of the large wind turbine blade, thereby extending its service life.

[0032] The preferred mounting plate 104 has a groove in the middle of one end away from the threaded post 103, and a knob block 105 is welded in the groove. The knob block 105 makes it easier and faster to install the threaded post 103.

[0033] The preferred multiple blade segments 4 are provided with windward grooves 10 along their length on their windward surfaces, wherein the opening of the windward grooves 10 facilitates the enhancement of the power of the wind turbine blades when they rotate.

[0034] Working principle of the invention:

[0035] First, install the reinforcement 1 at the end of the blade root section. During installation, simply screw the threaded post 103 into the threaded cylinder 101 until the through hole on the mounting plate 104 aligns with the through hole on the flange. This is quick and easy. Next, install the blade segments 4 in pairs from the blade root section, middle section, and blade tip section. During installation, insert the limiting ring 503 at the end of the prefabricated connecting bracket 501 into the mounting ring 7 inside the blade segment 4. During insertion, the locking groove on the limiting ring 503 moves along the direction of the locking block 5043. When the locking groove aligns with the locking block 5043, the locking block 5043 is inserted into the locking groove, completing the limiting and locking. At this time, part of the locking block 5043 is inserted into the locking groove, and the other part is located in the blind groove of the mounting ring 7. Simultaneously, the prefabricated connection... The end of the frame 501 abuts against the end of the blade segment 4. This operation is simple and can quickly complete the docking installation. During installation, the blade segments 4 on both sides can be inserted into the two ends of the connecting device 5 at the same time, which further improves the installation efficiency. Then, tighten the bolts 9 one by one into the bolt holes on the side wall of the blade segment 4 and tighten them with nuts. Then, cover the outer surface of the connecting device 5 with the sealing plate 6 and fix it to the blade segment 4 with screws. This achieves the purpose of rapid on-site installation and precise docking of the blades, and improves the installation efficiency.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fast-assembly segmented wind turbine blade, characterized by: The wind turbine blade comprises a root section, a middle section and a tip section, a reinforcing piece (1) is arranged on one side of the root section away from the middle section, support rings (2) are uniformly and separately fixed and connected to the inner walls of the root section, the middle section and the tip section, web beams (3) are arranged between the adjacent two support rings (2), the root section, the middle section and the tip section are composed of multiple blade sections (4), the adjacent two blade sections (4) are connected by connecting devices (5), the outer surfaces of the connecting devices (5) are covered with sealing plates (6) which have the same shape as the blade sections (4), and the two ends of the sealing plates (6) are fixed on the blade sections (4) by screws. The connecting device (5) comprises two prefabricated connecting frames (501) which are symmetrically arranged, the structure of the prefabricated connecting frame (501) is matched with the side of the blade section (4), a plurality of fixing rods (502) are connected to the outer sides of the two prefabricated connecting frames (501), the two prefabricated connecting frames (501) are provided with limiting rings (503) which can be inserted into the interiors of the blade sections (4) on the sides away from each other, the outer sides of the limiting rings (503) are matched with the inner sides of the blade sections (4), the interiors of the blade sections (4) corresponding to the limiting rings (503) are fixedly connected with mounting rings (7) which can be sleeved on the outer sides of the limiting rings (503), and the outer sides of the limiting rings (503) are tightly arranged with the inner sides of the mounting rings (7), and the mounting rings (7) are provided with locking mechanisms (504) for locking the limiting rings (503). The locking mechanism (504) comprises a return spring (5041), a fixing ring (5042) and a locking block (5043), a plurality of blind grooves are arranged on the inner sides of the mounting rings (7), the return springs (5041) are fixedly arranged in the blind grooves, the fixing rings (5042) are arranged at one end of the limiting ring (503) corresponding to the return springs (5041), the locking blocks (5043) are fixedly connected to one end of the limiting ring (503) corresponding to the fixing rings (5042), and the outer sides of the limiting rings (503) corresponding to the locking blocks (5043) are provided with locking grooves matched with the locking blocks (5043).

2. A quick-assembly segmented wind turbine blade according to claim 1, characterized in that: A plurality of through holes are arranged on the circumferential sides of the two prefabricated connecting frames (501) corresponding to the blade sections (4), bolt holes are arranged on the side walls of the blade sections (4) corresponding to the through holes, and the prefabricated connecting frames (501) are fixed to the side walls of the blade sections (4) by reinforcing bolts (9).

3. A quick-assembly segmented wind turbine blade according to claim 1, characterized in that: The fixing rings (5042) are fixedly connected with spring guide rods (5044) at the ends away from the locking blocks (5043), the return springs (5041) are sleeved on the outer sides of the spring guide rods (5044), and the lengths of the spring guide rods (5044) are one third of the lengths of the return springs (5041).

4. A quick-assembly sectional wind turbine blade according to claim 1, characterized in that: The locking blocks (5043) are provided with chamfered structures on the sides corresponding to the prefabricated connecting frames (501).

5. A quick-assembly sectional wind turbine blade according to claim 1, characterized in that: The reinforcing part (1) comprises a threaded cylinder (101), which is coaxially arranged with the blade root section, a plurality of reinforcing rods (102) are uniformly and spacedly connected between the threaded cylinder (101) and the blade root section along the circumferential direction thereof, a threaded column (103) is matched arranged in the threaded cylinder (101), the threaded column (103) is fixedly connected with a mounting disc (104) at the end thereof, a flange plate is fixedly welded with the outer periphery of the end of the blade root section and is in abutment with the mounting disc (104), and the mounting disc (104) and the flange plate are respectively uniformly and spacedly provided with through holes, through which bolts can pass, along the circumferential direction thereof and are connected through the bolts.

6. A quick-assembly sectional wind turbine blade according to claim 5, characterized in that: A recess is formed in the middle of the end of the mounting disc (104) away from the threaded column (103), and a knob block (105) is welded in the recess.

7. A quick-assembly sectional wind turbine blade according to claim 1, characterized in that: A plurality of windward grooves (10) are respectively formed on the windward surfaces of the blade sections (4) along the length direction thereof.

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