Wind turbine blade convenient to replace and replacing method thereof

Abstract

The invention discloses a wind turbine blade convenient to replace and a replacing method thereof, and belongs to the technical field of wind power generation equipment.The wind turbine blade convenient to replace comprises fan equipment, a blade assembly is installed on the fan equipment, the blade assembly is connected with a blade fixing assembly, and the blade fixing assembly is connected with the driving end of the fan equipment; the fan equipment is provided with a second blade positioning assembly, the second blade positioning assembly is connected with the driving end of the fan equipment, and the second blade positioning assembly is movably connected with the blade assembly; and the blade fixing assembly comprises a second driving assembly, a rotating assembly and a fixing assembly, the second driving assembly is installed at the driving end of the fan equipment, and the rotating assembly is installed on the fan equipment. By means of the mode, two-time positioning of the fan blade is achieved, and meanwhile fixing of the fan blade is automatically completed.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation equipment, and in particular to an easily replaceable wind turbine blade and a replacement method thereof. Background Art

[0002] Wind turbine blades are devices that capture kinetic energy from the wind. Medium and large wind turbines are generally located dozens of meters above the ground. When they are installed or replaced, they are often hoisted to the installation location by a crane. Currently, the blades are mostly fixed by first positioning and clamping them and then fixing them with bolts.

[0003] Among many existing technologies, Chinese patent CN105888989B discloses a wind turbine blade structure and installation method, which includes a blade, a blade mounting seat, an anti-dropout pin, an anti-rotation pin and an anti-rotation pin seat through a blade structure; an anti-dropout slot is provided on the circumferential side surface of the blade root, a blade anti-rotation cross-shaped through hole is provided at the center of the end surface of the blade root, and a blade mounting seat anti-dropout pin hole and an anti-dropout pin mounting hole are provided on the circumferential side surface of one end of the blade mounting seat connected to the blade root. The anti-drop pin mounting holes are arranged on both sides of the anti-drop pin hole of the blade mounting seat, and an anti-rotation pin seat mounting hole and an anti-rotation pin seat through hole are provided on the end face of the blade mounting seat away from the root of the blade, and the anti-rotation pin seat through hole is located in the center of the end face, and the anti-rotation pin seat mounting holes are evenly distributed along the circumferential end face around the anti-rotation pin seat through hole; one end of the anti-drop pin is an anti-drop arc end face, and the other end is provided with an anti-drop pin hole, and the anti-drop arc end face cooperates with the anti-drop slot; the clamping and positioning installation of the fan blades is realized.

[0004] However, the installation of the anti-dropping pin in this structure needs to be done manually, which makes it inconvenient to use.

[0005] Based on this, the present invention designs a wind turbine blade that is easy to replace and a replacement method thereof to solve the above problems. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides a wind turbine blade that is easy to replace and a replacement method thereof.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A wind turbine blade that is easily replaceable includes a wind turbine device, a blade assembly mounted on the wind turbine device, the blade assembly being connected to a blade fixing assembly, the blade fixing assembly being connected to a drive end of the wind turbine device, a second blade positioning assembly mounted on the wind turbine device, the second blade positioning assembly being connected to the drive end of the wind turbine device, and the second blade positioning assembly being movably connected to the blade assembly;

[0009] The blade fixing assembly includes a second drive assembly, a rotating assembly and a fixing assembly. The second drive assembly is installed on the drive end of the fan equipment, the rotating assembly is installed on the fan equipment, the second drive assembly and the rotating assembly are connected, the fixing assembly is installed on the rotating assembly, and the fixing assembly is connected to the blade assembly.

[0010] Furthermore, the fan equipment includes a front shell, a rear shell, a first blade positioning assembly and a first drive assembly, the front shell and the rear shell are rotatably connected, the first blade positioning assembly is installed on the front shell, and the first drive assembly is installed on the rear shell; the front shell is connected to the rotating assembly, the first blade positioning assembly is connected to the blade assembly and the second blade positioning assembly, and the second drive assembly is installed on the first drive assembly.

[0011] Furthermore, the first blade positioning assembly includes a cover body, a mounting opening and an extension platform. There are three cover bodies. The cover bodies are fixedly installed on the outer surface of the front shell at equal intervals. The rear end of the cover body is an open end. The cover body is connected to the second blade positioning assembly. A mounting opening is opened on the outer wall of the cover body. The mounting opening is a U-shaped opening, and the U-shaped opening is connected to the open end. The extension platform is fixedly installed around the U-shaped opening, and the extension platform is movably connected to the blade assembly.

[0012] Furthermore, the first drive assembly includes an electric slide rail, a connecting plate and a drive plate. The electric slide rail is fixedly connected to the inner wall of the rear shell through the connecting plate. The output end of the electric slide rail is fixedly connected to the drive plate. The drive plate is connected to the second drive assembly and the second blade positioning assembly.

[0013] Furthermore, the blade assembly includes a blade body and a connecting and fixing assembly, the connecting and fixing assembly is arranged on the blade body, the blade body is connected to the fixing assembly, and the connecting and fixing assembly is connected to the extension platform and the fixing assembly.

[0014] Furthermore, the connecting and fixing assembly includes a connecting ring, a first annular groove, a second annular groove and a fixed threaded hole. The connecting ring is fixedly installed on the end of the blade body. The connecting ring and the fixing assembly are movably connected. The first annular groove is opened on the outer wall of the connecting ring close to the blade body, and the second annular groove is opened on the outer wall of the connecting ring away from the blade body. The first annular groove is slidably connected to the extension platform, the second annular groove is connected to the second blade positioning assembly, and the fixed threaded hole is opened on the blade body. The connecting ring, the fixed threaded hole and the fixing assembly are connected.

[0015] Furthermore, the second driving assembly includes a motor and a first gear, the motor is fixedly mounted on the lower end of the driving plate, the output end of the motor is fixedly connected to the first gear, and the first gear is connected to the rotating assembly;

[0016] The rotating assembly includes a mounting block, a connecting rod, a shaft sleeve, a connecting shaft, a cam groove, a cam, a second gear and a reduction motor. The mounting block is fixedly connected to the inner end of the front housing through the connecting rod. There are three shaft sleeves, which are rotatably connected to the side wall of the mounting block at equal intervals. The shaft sleeve is sleeved on the outer wall of the connecting shaft. The outer wall of the connecting shaft is fixedly mounted with a cam. The shaft sleeve is provided with a cam groove for sliding engagement with the cam. The fixed assembly is connected to the connecting shaft, and the second gear is meshed with the first gear.

[0017] The first gear is fixedly mounted on the drive shaft, and the second gear is mounted on the drive shaft through the first and second drive shafts, and the transmission gear ...

[0018] Furthermore, the second blade positioning assembly includes a third drive assembly and a positioning plate assembly, the third drive assembly is mounted on the drive plate, the third drive assembly and the positioning plate assembly are movably connected, and the positioning plate assembly is connected to the second annular groove and the cover body.

[0019] Furthermore, the third driving assembly includes an electric push rod and a clamping block, wherein the electric push rod is fixedly mounted on the lower end of the driving plate, the clamping block is fixedly mounted on the output end of the electric push rod, and the clamping block is movably connected to the positioning plate assembly;

[0020] The positioning plate assembly includes a positioning plate, an arc-shaped positioning groove, a baffle and a connecting block. The positioning plate and the limiting slide are slidably connected. The front end of the positioning plate is provided with an arc-shaped positioning groove for cooperating with the second ring groove for clamping. The inner end of the cover body is provided with a limiting slide for cooperating with the positioning plate for sliding connection. The rear end of the positioning plate is fixedly installed with a baffle. The baffle and the rear end open end of the cover body are fixedly connected by screws. The connecting block is fixedly installed at the rear end of the baffle. The connecting block is provided with a card slot for cooperating with the card block for sliding connection.

[0021] A method for replacing wind turbine blades that are easy to replace is characterized by using the wind turbine blades that are easy to replace as described in the claims, comprising the following steps:

[0022] Step 1: Rotate the front housing until the mounting opening on the front housing is facing the ground. Move the blade body to the open end of the cover. Slide the first ring groove on the connecting collar and the extension platform at the U-shaped opening until the first ring groove and the end of the extension platform engage.

[0023] Step 2: The construction personnel install the positioning plate assembly on the first blade positioning assembly and start the electric slide rail. The output end of the electric slide rail drives the drive plate to move toward the front housing, and the drive plate drives the third drive assembly to move. When the clamping block moves to the upper end of the clamping slot, the electric slide rail is stopped and the electric push rod is started. The output end of the electric push rod drives the clamping block to move downward until the clamping block and the clamping slot are completely fitted and connected. The electric slide rail continues to run. When the arc-shaped positioning groove and the first annular groove are engaged, the baffle and the open end of the cover body are fitted together, and the construction personnel fix the two with screws.

[0024] Step 3, start the electric slide again, the driving plate drives the second driving assembly to move, when the first gear and the second gear are engaged and connected, stop the electric slide, start the motor, the output end of the motor drives the first gear to rotate, the first gear drives the second gear to rotate, the second gear drives the shaft sleeve to rotate, the connecting shaft rotates, the cam groove drives the cam to move vertically, the cam drives the connecting shaft to move vertically, the connecting shaft drives the fixing assembly to move vertically, when the second mounting plate and the blade body are in contact, the cam just moves to the end of the cam groove, and the end of the threaded rod contacts the upper end of the fixed threaded hole, at this time the threaded rod moves upward, the threaded rod drives the sliding rod and the third gear to move upward and slide on the fourth gear, the third gear slides in the sliding hole, and the third gear compresses the spring;

[0025] Step 4: Start the reduction motor. The output end of the reduction motor drives the fourth gear to rotate. The fourth gear drives the third gear to rotate. The third gear drives the threaded rod and the sliding rod to rotate. The threaded rod is threadedly connected to the fixed threaded hole. When the threaded rod and the fixed threaded hole are fully connected, the reduction motor stops.

[0026] Step 5. Start the electric push rod, which drives the block to reset. Then start the electric slide rail, which drives the second drive assembly and the third drive assembly to reset. Complete the blade installation one by one according to the above, and the wind turbine can then generate electricity normally.

[0027] Beneficial effects

[0028] When the application is used, the construction personnel positions the blade assembly on the fan equipment, starts the output end of the fan equipment to drive the second blade positioning assembly to move on the fan equipment and make the second blade positioning assembly further position the blade assembly, realizes twice positioning of the fan blade, when the fan equipment drives the second driving assembly and the rotating assembly to be connected, the second driving assembly drives the rotating assembly to rotate, the rotating assembly drives the fixing assembly and the blade assembly to complete the connection and fixing, realizes automatic positioning and fixing of the fan blade. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0030] Figure 1 A three-dimensional view of a main body structure of a wind turbine blade convenient to replace Figure 1 ;

[0031] Figure 2 A front view of a wind turbine blade structure convenient to replace

[0032] Figure 3 A left view of a wind turbine blade structure convenient to replace

[0033] Figure 4 A three-dimensional view of a main body structure of a wind turbine blade convenient to replace Figure 2 ;

[0034] Figure 5 A sectional view along the A-A direction of Figure 2 ;

[0035] Figure 6 A three-dimensional view of a blade assembly structure

[0036] Figure 7 A sectional view along the B-B direction of Figure 2 ;

[0037] Figure 8 A sectional view along the C-C direction of Figure 2 ;

[0038] Figure 9 An enlarged view of D in Figure 5 ;

[0039] Figure 10 An enlarged view of E in Figure 8 .

[0040] The numbers in the figure represent:

[0041] 1. Fan Equipment 11. Front Housing 12. Rear Housing 13. First Blade Positioning Assembly 131. Cover 132. Mounting Port 133. Extension Platform 14. First Drive Assembly 141. Electric Slide 142. Connecting Plate 143. Drive Plate 2. Blade Assembly 21. Blade Body 22. Connecting and Fixing Assembly 221. Connecting Collar 222. First Ring Groove 223. Second Ring Groove 224. Fixing Threaded Hole 3. Blade Fixing Assembly 31. Second Drive Assembly 311. Motor 312. First Gear 32. Rotating Assembly 321. Mounting Block 322. Connecting Rod 32 3. Bushing 324. Connecting shaft 325. Cam groove 326. Cam 327. Second gear 328. Reducer motor 33. Fixing assembly 331. First mounting plate 332. Second mounting plate 333. Through hole 334. Sliding hole 335. Threaded rod 336. Sliding rod 337. Third gear 338. Fourth gear 339. Spring 4. Second blade positioning assembly 41. Third drive assembly 411. Electric push rod 412. Block 42. Positioning plate assembly 421. Positioning plate 422. Arc-shaped positioning groove 423. Baffle 424. Connecting block 425. Slot. DETAILED DESCRIPTION

[0042] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0043] The present invention will be further described below with reference to the embodiments.

[0044] Example 1

[0045] Please refer to the instruction manual Figures 1-10 A wind turbine blade that is easy to replace includes a wind turbine device 1, a blade assembly 2 is installed on the wind turbine device 1, the blade assembly 2 is connected to a blade fixing assembly 3, the blade fixing assembly 3 is connected to the driving end of the wind turbine device 1, a second blade positioning assembly 4 is installed on the wind turbine device 1, the second blade positioning assembly 4 is connected to the driving end of the wind turbine device 1, and the second blade positioning assembly 4 is movably connected to the blade assembly 2;

[0046] The blade fixing assembly 3 includes a second drive assembly 31, a rotating assembly 32 and a fixing assembly 33. The second drive assembly 31 is installed on the drive end of the fan equipment 1, the rotating assembly 32 is installed on the fan equipment 1, the second drive assembly 31 and the rotating assembly 32 are connected, the fixing assembly 33 is installed on the rotating assembly 32, and the fixing assembly 33 is connected to the blade assembly 2.

[0047] The construction personnel position the blade assembly 2 on the fan equipment 1, start the output end of the fan equipment 1 to drive the second blade positioning assembly 4 to move on the fan equipment 1 and make the second blade positioning assembly 4 further position the blade assembly 2, thereby realizing the double positioning of the fan blades. When the second drive assembly 31 and the rotating assembly 32 are connected by the fan equipment 1, the second drive assembly 31 drives the rotating assembly 32 to rotate, and the rotating assembly 32 drives the fixing assembly 33 and the blade assembly 2 to complete the connection and fixation, thereby realizing the double positioning and automatic fixation of the fan blades.

[0048] Example 2

[0049] In some embodiments, as Figures 1-10 As shown, the fan equipment 1 includes a front shell 11, a rear shell 12, a first blade positioning assembly 13 and a first drive assembly 14. The front shell 11 and the rear shell 12 are rotatably connected, the first blade positioning assembly 13 is installed on the front shell 11, and the first drive assembly 14 is installed on the rear shell 12; the front shell 11 is connected to the rotating assembly 32, the first blade positioning assembly 13 is connected to the blade assembly 2 and the second blade positioning assembly 4, and the second drive assembly 31 is installed on the first drive assembly 14.

[0050] The first blade positioning assembly 13 includes a cover body 131, a mounting opening 132 and an extension platform 133. There are three cover bodies 131. The cover bodies 131 are fixedly installed on the outer surface of the front shell body 11 at equal intervals. The rear end of the cover body 131 is an open end. The cover body 131 is connected to the second blade positioning assembly 4. A mounting opening 132 is opened on the outer wall of the cover body 131. The mounting opening 132 is a U-shaped opening, and the U-shaped opening is connected to the open end. The extension platform 133 is fixedly installed around the U-shaped opening, and the extension platform 133 is movably connected to the blade assembly 2.

[0051] The first drive assembly 14 includes an electric slide rail 141, a connecting plate 142 and a drive plate 143. The electric slide rail 141 is fixedly connected to the inner wall of the rear shell 12 through the connecting plate 142. The output end of the electric slide rail 141 is fixedly connected to the drive plate 143. The drive plate 143 is connected to the second drive assembly 31 and the second blade positioning assembly 4.

[0052] The blade assembly 2 includes a blade body 21 and a connecting and fixing assembly 22 . The connecting and fixing assembly 22 is arranged on the blade body 21 . The blade body 21 is connected to the fixing assembly 33 . The connecting and fixing assembly 22 is connected to the extension platform 133 and the fixing assembly 33 .

[0053] The connecting and fixing component 22 includes a connecting ring 221, a first annular groove 222, a second annular groove 223 and a fixing threaded hole 224. The connecting ring 221 is fixedly installed on the end of the blade body 21. The connecting ring 221 and the fixing component 33 are movably connected. The first annular groove 222 is opened on the outer wall of the connecting ring 221 close to the blade body 21, and the second annular groove 223 is opened on the outer wall of the connecting ring 221 away from the blade body 21. The first annular groove 222 and the extension platform 133 are slidingly connected, the second annular groove 223 is connected to the second blade positioning component 4, and the fixing threaded hole 224 is opened on the blade body 21. The connecting ring 221, the fixing threaded hole 224 and the fixing component 33 are connected.

[0054] The second driving assembly 31 includes a motor 311 and a first gear 312. The motor 311 is fixedly mounted on the lower end of the driving plate 143. The output end of the motor 311 is fixedly connected to the first gear 312. The first gear 312 is connected to the rotating assembly 32.

[0055] The rotating assembly 32 includes a mounting block 321, a connecting rod 322, a sleeve 323, a connecting shaft 324, a cam groove 325, a cam 326, a second gear 327 and a reduction motor 3310. The mounting block 321 is fixedly connected to the inner end of the front housing 11 through the connecting rod 322. There are three sleeves 323, which are rotatably connected to the side wall of the mounting block 321 at equal intervals. The sleeve 323 is sleeved on the outer wall of the connecting shaft 324. The outer wall of the connecting shaft 324 is fixedly mounted with a cam 326. The sleeve 323 is provided with a cam groove 325 for sliding with the cam 326. The cam groove 325 is inclined. The fixed assembly 33 is connected to the connecting shaft 324. The second gear 327 is meshed with the first gear 312.

[0056] The fixing assembly 33 includes a first mounting plate 331, a second mounting plate 332, a threaded rod 335, a sliding rod 336, a third gear 337, a fourth gear 338, a spring 339 and a reduction motor 3310. The first mounting plate 331 is fixedly connected to the end of the connecting shaft 324. The first mounting plate 331 and the second mounting plate 332 are fixedly connected via a connecting column. The first mounting plate 331 and the second mounting plate 332 are both slidably connected to the inner end of the connecting ring 221. The second mounting plate 332 is in contact with the blade body 21. The reduction motor 3310 is fixedly mounted on the first mounting plate 331. A sliding hole 334 is provided on the mounting plate 331, and a through hole 333 is provided on the second mounting plate 332. The opening positions of the through hole 333 and the sliding hole 334 correspond to each other. The two ends of the third gear 337 are fixedly connected with a threaded rod 335 and a sliding rod 336 respectively. The threaded rod 335 passes through the through hole 333, and the threaded rod 335 is threadedly connected to the fixed threaded hole 224. The sliding rod 336 is movably connected to the sliding hole 334. The third gear 337 and the fourth gear 338 are meshed and slidably connected. The fourth gear 338 is fixedly installed on the output end of the reduction motor 3310, and the spring 339 is arranged between the third gear 337 and the first mounting plate 331.

[0057] The second blade positioning assembly 4 includes a third drive assembly 41 and a positioning plate assembly 42. The third drive assembly 41 is mounted on the drive plate 143. The third drive assembly 41 and the positioning plate assembly 42 are movably connected. The positioning plate assembly 42 is connected to the second annular groove 223 and the cover body 131.

[0058] The third driving assembly 41 includes an electric push rod 411 and a clamping block 412. The electric push rod 411 is fixedly mounted on the lower end of the driving plate 143. The clamping block 412 is fixedly mounted on the output end of the electric push rod 411. The clamping block 412 is movably connected to the positioning plate assembly 42.

[0059] The positioning plate assembly 42 includes a positioning plate 421, an arc-shaped positioning groove 422, a baffle 423 and a connecting block 424. The positioning plate 421 and the limiting slide 134 are slidingly connected. The front end of the positioning plate 421 is provided with an arc-shaped positioning groove 422 for cooperating with the second annular groove 223 for clamping. The inner end of the cover body 131 is provided with a limiting slide for cooperating with the positioning plate 421 for sliding connection. The rear end of the positioning plate 421 is fixedly installed with a baffle 423. The baffle 423 and the rear open end of the cover body 131 are fixedly connected by screws. The connecting block 424 is fixedly installed on the rear end of the baffle 423. The connecting block 424 is provided with a card slot 425 for cooperating with the card block 412 for sliding connection.

[0060] Example 3

[0061] Based on the examples, please refer to the appendix of the specification. Figures 1-10A method for replacing a wind turbine blade that is easy to replace is provided, comprising the following steps:

[0062] Step 1: Rotate the front housing 11 until the mounting opening 132 on the upper housing 131 is facing the ground. Move the blade body 21 to the open end of the cover 131 and slide the first annular groove 222 on the connecting collar 221 onto the extension 133 at the U-shaped opening until the first annular groove 222 and the end of the extension 133 engage.

[0063] Step 2: The construction personnel install the positioning plate assembly 42 on the first blade positioning assembly 13 and start the electric slide 141. The output end of the electric slide 141 drives the drive plate 143 to move toward the front housing 11. The drive plate 143 drives the third drive assembly 41 to move. When the clamping block 412 moves to the upper end of the clamping slot 425, the electric slide 141 is stopped and the electric push rod 411 is started. The output end of the electric push rod 411 drives the clamping block 412 to move downward until the clamping block 412 and the clamping slot 425 are completely fitted and connected. The electric slide 141 continues to operate. When the arc-shaped positioning groove 422 and the first annular groove 222 are engaged, the baffle 423 and the open end of the cover body 131 are fitted together. The construction personnel fix the two with screws.

[0064] Step 3: Start the electric slide 141 again, and the driving plate 143 drives the second driving assembly 31 to move. When the first gear 312 and the second gear 327 are engaged, stop the electric slide 141 and start the motor 311. The output end of the motor 311 drives the first gear 312 to rotate, the first gear 312 drives the second gear 327 to rotate, the second gear 327 drives the sleeve 323 to rotate, the connecting shaft 324 rotates, the cam slot 325 is tilted, the cam slot 325 drives the cam 326 to move vertically, and the cam 326 drives the connecting shaft The shaft 324 moves vertically, and the connecting shaft 324 drives the fixing assembly 33 to move vertically. When the second mounting plate 332 and the blade body 21 are in contact with each other, the cam 326 just moves to the end of the cam groove 325. At the same time, the end of the threaded rod 335 contacts the upper end of the fixing threaded hole 224. At this time, the threaded rod 335 moves upward, and the threaded rod 335 drives the sliding rod 336 and the third gear 337 to move upward and slide on the fourth gear 338. The third gear 337 slides in the sliding hole 334. At the same time, the third gear 337 compresses the spring 339.

[0065] Step 4: Start the reduction motor 3310. The output end of the reduction motor 3310 drives the fourth gear 338 to rotate. The fourth gear 338 drives the third gear 337 to rotate. The third gear 337 drives the threaded rod 335 and the sliding rod 336 to rotate. The threaded rod 335 is threadedly connected to the fixed threaded hole 224. When the threaded rod 335 and the fixed threaded hole 224 are fully connected, the reduction motor 3310 stops.

[0066] Step 5: Start the electric push rod 411, which drives the block 412 to reset. Then start the electric slide rail 141, which drives the second drive assembly 31 and the third drive assembly 41 to reset. Complete the blade installation one by one as described above, and the wind turbine can then generate electricity normally.

[0067] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A wind turbine blade that is easy to replace, comprising a wind turbine device (1), characterized in that: a blade assembly (2) is mounted on the wind turbine device (1), the blade assembly (2) is connected to a blade fixing assembly (3), the blade fixing assembly (3) is connected to a driving end of the wind turbine device (1), a second blade positioning assembly (4) is mounted on the wind turbine device (1), the second blade positioning assembly (4) is connected to the driving end of the wind turbine device (1), and the second blade positioning assembly (4) is movably connected to the blade assembly (2); The blade fixing assembly (3) comprises a second driving assembly (31), a rotating assembly (32) and a fixing assembly (33); the second driving assembly (31) is mounted on the driving end of the fan device (1); the rotating assembly (32) is mounted on the fan device (1); the second driving assembly (31) and the rotating assembly (32) are connected; the fixing assembly (33) is mounted on the rotating assembly (32); and the fixing assembly (33) is connected to the blade assembly (2).

2. The easily replaceable wind turbine blade according to claim 1, characterized in that: The fan device (1) comprises a front housing (11), a rear housing (12), a first blade positioning assembly (13) and a first drive assembly (14); the front housing (11) and the rear housing (12) are rotatably connected, the first blade positioning assembly (13) is mounted on the front housing (11), and the first drive assembly (14) is mounted on the rear housing (12); the front housing (11) is connected to a rotating assembly (32), the first blade positioning assembly (13) is connected to the blade assembly (2) and the second blade positioning assembly (4), and the second drive assembly (31) is mounted on the first drive assembly (14).

3. The easily replaceable wind turbine blade according to claim 2, characterized in that: The first blade positioning assembly (13) comprises a cover body (131), a mounting opening (132) and an extension platform (133). There are three cover bodies (131). The cover bodies (131) are fixedly mounted on the outer surface of the front housing (11) at equal intervals. The rear end of the cover body (131) is an open end. The cover body (131) is connected to the second blade positioning assembly (4). The outer wall of the cover body (131) is provided with a mounting opening (132). The mounting opening (132) is a U-shaped opening, and the U-shaped opening is communicated with the open end. The extension platform (133) is fixedly mounted around the U-shaped opening. The extension platform (133) is movably connected to the blade assembly (2).

4. The easily replaceable wind turbine blade according to claim 3, characterized in that: The first drive assembly (14) comprises an electric slide rail (141), a connecting plate (142) and a drive plate (143); the electric slide rail (141) is fixedly connected to the inner wall of the rear housing (12) via the connecting plate (142); the output end of the electric slide rail (141) is fixedly connected to the drive plate (143); and the drive plate (143) is connected to the second drive assembly (31) and the second blade positioning assembly (4).

5. The easily replaceable wind turbine blade according to claim 4, characterized in that: The blade assembly (2) comprises a blade body (21) and a connecting and fixing assembly (22); the connecting and fixing assembly (22) is arranged on the blade body (21); the blade body (21) and the fixing assembly (33) are connected; and the connecting and fixing assembly (22) and the extension platform (133) and the fixing assembly (33) are all connected.

6. The easily replaceable wind turbine blade according to claim 5, characterized in that: The connecting and fixing assembly (22) comprises a connecting collar (221), a first annular groove (222), a second annular groove (223) and a fixing threaded hole (224); the connecting collar (221) is fixedly mounted on the end of the blade body (21); the connecting collar (221) and the fixing assembly (33) are movably connected; the first annular groove (222) is provided on the outer wall of the connecting collar (221) on the side close to the blade body (21); the second annular groove (223) is provided on the outer wall of the connecting collar (221) on the side away from the blade body (21); the first annular groove (222) and the extension platform (133) are slidably connected; the second annular groove (223) is connected to the second blade positioning assembly (4); the fixing threaded hole (224) is provided on the blade body (21); the connecting collar (221), the fixing threaded hole (224) and the fixing assembly (33) are connected.

7. The easily replaceable wind turbine blade according to claim 6, characterized in that: The second driving assembly (31) comprises a motor (311) and a first gear (312), wherein the motor (311) is fixedly mounted on the lower end of the driving plate (143), and the output end of the motor (311) is fixedly connected to the first gear (312), and the first gear (312) is connected to the rotating assembly (32); The rotating assembly (32) includes a mounting block (321), a connecting rod (322), a shaft sleeve (323), a connecting shaft (324), a cam groove (325), a cam (326), a second gear (327) and a reduction motor (3310). The mounting block (321) is fixedly connected to the inner end of the front housing (11) through the connecting rod (322). There are three shaft sleeves (323). The shaft sleeves (323) are rotatably connected to the side wall of the mounting block (321) at equal intervals. The shaft sleeves (323) are sleeved on the outer wall of the connecting shaft (324). The outer wall of the connecting shaft (324) is fixedly mounted with a cam (326). The shaft sleeve (323) is provided with a cam groove (325) for slidingly fitting with the cam (326). The fixing assembly (33) is connected to the connecting shaft (324). The second gear (327) is meshed with the first gear (312). The fixing assembly (33) includes a first mounting plate (331), a second mounting plate (332), a threaded rod (335), a sliding rod (336), a third gear (337), a fourth gear (338), a spring (339) and a reduction motor (3310), wherein the first mounting plate (331) is fixedly connected to the end of the connecting shaft (324), the first mounting plate (331) and the second mounting plate (332) are fixedly connected via a connecting column, the first mounting plate (331) and the second mounting plate (332) are both slidably connected to the inner end of the connecting ring (221), the second mounting plate (332) is in contact with the blade body (21), and the reduction motor (3310) is fixedly mounted on the first mounting plate (331), and the first mounting plate (331) is fixedly connected to the end of the connecting shaft (324). 31), a sliding hole (334) is provided on the second mounting plate (332), a through hole (333) is provided on the second mounting plate (332), the opening positions of the through hole (333) and the sliding hole (334) correspond to each other, the two ends of the third gear (337) are fixedly connected with a threaded rod (335) and a sliding rod (336), the threaded rod (335) passes through the through hole (333), the threaded rod (335) and the fixed threaded hole (224) are threadedly connected, the sliding rod (336) and the sliding hole (334) are movably connected, the third gear (337) and the fourth gear (338) are meshed and slidably connected, the fourth gear (338) is fixedly installed on the output end of the reduction motor (3310), and the spring (339) is provided between the third gear (337) and the first mounting plate (331).

8. The easily replaceable wind turbine blade according to claim 7, characterized in that: The second blade positioning assembly (4) comprises a third drive assembly (41) and a positioning plate assembly (42); the third drive assembly (41) is mounted on the drive plate (143); the third drive assembly (41) and the positioning plate assembly (42) are movably connected; and the positioning plate assembly (42) is connected to the second annular groove (223) and the cover body (131).

9. The easily replaceable wind turbine blade according to claim 8, characterized in that: The third driving assembly (41) includes an electric push rod (411) and a clamping block (412), wherein the electric push rod (411) is fixedly mounted on the lower end of the driving plate (143), and the clamping block (412) is fixedly mounted on the output end of the electric push rod (411), and the clamping block (412) is movably connected to the positioning plate assembly (42); The positioning plate assembly (42) includes a positioning plate (421), an arc-shaped positioning groove (422), a baffle (423) and a connecting block (424); the positioning plate (421) and the limiting slide groove (134) are slidably connected; the front end of the positioning plate (421) is provided with an arc-shaped positioning groove (422) for engaging with the second annular groove (223); the inner end of the cover body (131) is provided with a limiting slide groove for engaging with the positioning plate (421) for sliding connection; the rear end of the positioning plate (421) is fixedly installed with a baffle (423); the baffle (423) and the rear open end of the cover body (131) are fixedly connected by screws; the connecting block (424) is fixedly installed at the rear end of the baffle (423); the connecting block (424) is provided with a card slot (425) for engaging with the card block (412) for sliding connection.

10. A method for replacing wind turbine blades that is easy to replace, characterized in that: The wind turbine blade that is easy to replace according to claim 9 comprises the following steps: Step 1: Rotate the front housing (11) until the mounting opening (132) on the upper housing 131 is facing the ground, transport the blade body (21) to the open end of the cover (131), and slide the first annular groove (222) on the connecting ring (221) and the extension platform (133) at the U-shaped opening until the first annular groove (222) and the end of the extension platform (133) are engaged; Step 2: The construction personnel install the positioning plate assembly (42) on the first blade positioning assembly (13), start the electric slide rail (141), and the output end of the electric slide rail (141) drives the drive plate (143) to move toward the front housing (11). The drive plate (143) drives the third drive assembly (41) to move. When the clamping block (412) moves to the upper end of the clamping slot (425), the electric slide rail (141) is stopped, and the electric push rod (411) is started. The output end of the electric push rod (411) drives the clamping block (412) to move downward until the clamping block (412) and the clamping slot (425) are completely fitted and connected. The electric slide rail (141) continues to operate. When the arc-shaped positioning groove (422) and the first annular groove (222) are clamped, the baffle (423) and the open end of the cover body (131) are fitted, and the construction personnel fix the two with screws. Step 3: Start the electric slide rail (141) again, the driving plate (143) drives the second driving assembly (31) to move, and when the first gear (312) and the second gear (327) are engaged and connected, stop the electric slide rail (141), start the motor (311), the output end of the motor (311) drives the first gear (312) to rotate, the first gear (312) drives the second gear (327) to rotate, the second gear (327) drives the shaft sleeve (323) to rotate, the connecting shaft (324) rotates, the cam groove (325) drives the cam (326) to move vertically, and the cam (326) drives the connecting shaft (324) to move vertically. The connecting shaft (324) drives the fixing assembly (33) to move vertically. When the second mounting plate (332) and the blade body (21) are in contact with each other, the cam (326) just moves to the end of the cam groove (325). At the same time, the end of the threaded rod (335) contacts the upper end of the fixing threaded hole (224). At this time, the threaded rod (335) moves upward. The threaded rod (335) drives the sliding rod (336) and the third gear (337) to move upward and slide on the fourth gear (338). The third gear (337) slides in the sliding hole (334). At the same time, the third gear (337) compresses the spring (339). Step 4: Start the reduction motor (3310). The output end of the reduction motor (3310) drives the fourth gear (338) to rotate. The fourth gear (338) drives the third gear (337) to rotate. The third gear (337) drives the threaded rod (335) and the sliding rod (336) to rotate. The threaded rod (335) and the fixed threaded hole (224) are threadedly connected. When the threaded rod (335) and the fixed threaded hole (224) are fully connected, the reduction motor (3310) stops. Step 5: Start the electric push rod (411), which drives the block (412) to reset, and then start the electric slide rail (141), which drives the second drive assembly (31) and the third drive assembly (41) to reset. The blades are installed one by one according to the above steps, and the fan can then generate electricity normally.

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