Positioning structure for hoisting impeller of wind turbine generator in mountain wind power plant

Abstract

The invention belongs to the technical field of wind power generation, and particularly relates to a positioning structure for hoisting an impeller of a wind turbine generator in a mountain wind power plant, which comprises a cabin, a wind turbine generator set is arranged in the cabin, a power input shaft of the wind turbine generator set is fixedly connected with a connecting disc, a hub is fixed on the connecting disc, and the hub is fixed on the cabin. A plurality of fixing cylinders are evenly distributed on the side wall of the hub in the circumferential direction, and blades are fixed to the ends of the fixing cylinders. The pre-fixing assembly is used for fixing the spatial position of the blade in advance, and the pre-fixing assembly comprises a movable cylinder arranged in the fixed cylinder; the adjusting assembly is used for driving the blade to rotate around the axis of the blade so as to adjust the mounting angle after the blade is pre-fixed; the pre-fixing assembly is arranged on the outer side of the hub to perform pre-fixing operation on the blades, manual operation does not need to enter the inner side of the hub, the operation process is greatly simplified, and the whole process is simpler and more convenient.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of wind power generation, in particular to a positioning structure for hoisting a wind turbine impeller in a mountain wind farm. BACKGROUND

[0002] The wind turbine impeller is mainly composed of a hub and three blades, the generator is composed of a rotor and a stator, the stator is connected with the base of the nacelle, and the rotor is connected with the impeller and rotates along the axis of the rotor relative to the stator under the drive of the impeller. At present, the hoisting process of the wind turbine impeller usually includes the following steps: first, installing the tower on the foundation; second, hoisting the nacelle to the tower; third, hoisting the generator to the connecting flange of the nacelle; and finally, hoisting the assembled impeller to the connecting flange of the generator on the ground. However, with the increasing number of mountain wind farms, the complexity of the terrain and the limited working space make the feasibility of ground assembly of the impeller reduced. Therefore, the method of hoisting the single blades one by one to the hub becomes a more reasonable and practical solution.

[0003] A patent application CN117432574B discloses a wind power blade installation fastening device without turning, which includes a hub and a blade. Three connecting barrels are arranged on the hub, and the side wall of the connecting barrel is provided with an opening. A pre-connection assembly and a positioning assembly are installed on the inner side of the connecting barrel, and a detachable counterweight assembly is installed on the outer side of the connecting barrel. The detachable counterweight assembly can balance the hub gravity center, avoid the wind turbine main shaft overcoming large torque, and be more secure. At the same time, the detachable counterweight assembly can also be used to drive the positioning assembly to adjust the angle of the blade, which facilitates the positioning work. This method has lower requirements for the site and equipment compared with the existing pre-installation method, does not need to turn the impeller in the air, avoids the risk of the impeller contacting the tower during hoisting, and overcomes the problem that the wind turbine main shaft cannot maintain balance during installation of the impeller, which simplifies the air positioning work during installation of the blade and is more practical.

[0004] However, the above-mentioned technology has the following defects: during the pre-fixing process of the blade, the operator needs to enter the hub to rotate the pre-installation flange and align it with the connecting stud at the end of the blade. Due to the limited space of the hub and the fact that the worker must wear safety equipment to enter and exit, the operation is not convenient, which prolongs the hoisting period and increases the risk of mechanical injury.

[0005] Therefore, the application provides a positioning structure for hoisting a wind turbine impeller in a mountain wind farm. SUMMARY

[0006] In order to make up for the shortcomings of the prior art and solve at least one technical problem raised in the background art.

[0007] The technical scheme adopted by the present application to solve its technical problems is: a positioning structure for hoisting a blade wheel of a wind turbine in a mountain wind farm, comprising

[0008] A cabin is internally provided with a wind turbine, a connecting disc is fixedly connected to a power input shaft of the wind turbine, a hub is fixed to the connecting disc, a plurality of fixing cylinders are uniformly distributed on a side wall of the hub in a circumferential direction, and blades are fixed to end portions of the fixing cylinders;

[0009] A pre-fixing assembly is used for pre-fixing the spatial position of the blades, and comprises a movable cylinder arranged in the fixing cylinder, which can axially extend to the outside of the fixing cylinder and be pre-fixedly connected to a root portion of the blade;

[0010] An adjusting assembly is used for adjusting the installation angle of the blade, and comprises a driving rod and a connecting assembly, the connecting assembly is fixedly arranged in an inner cavity of the movable cylinder, the driving rod is slidably penetrated through the connecting assembly, and the connecting assembly can axially slide along the driving rod to achieve axial extension or retraction of the movable cylinder;

[0011] A driving assembly is arranged on the inner side of the hub, is in transmission connection with the driving rod, and is used for driving the driving rod to rotate around its own axis to drive the movable cylinder to synchronously rotate.

[0012] Preferably, a guide block is fixed to the root portion of the blade, a flange one is fixed to the end portion of the fixing cylinder, a flange three is fixed to the side wall of the root portion of the blade, the flange one and the flange three are matched, a flange two is fixed to the end portion of the movable cylinder, and a flange four is fixed to the side wall of the guide block, the flange two and the flange four are matched.

[0013] Preferably, the positioning assembly further comprises a cylinder one fixed to the inner wall of the hub, a piston rod is sealingly and slidably arranged in the cylinder one, an active hole matched with an end portion of the piston rod is arranged on the side wall of the hub and the cabin, an electromagnetic block is arranged in the cabin, and the electromagnetic block can attract the piston rod to move after being electrified.

[0014] Preferably, the connecting assembly comprises a shell, a ratchet wheel is fixed to the inner wall of the shell, a rotating disc is rotatably arranged in the middle of the shell, a clamping block one is elastically connected to the side wall of the rotating disc through a torsional spring, a through hole is arranged at the center of the rotating disc, the driving rod is slidably penetrated through the through hole, and the driving rod is matched with the through hole.

[0015] Preferably, the driving assembly comprises a gear box fixedly arranged inside the hub, a gear disc rotatably arranged inside the gear box, a motor fixedly arranged outside the gear box and used for driving the gear disc to rotate, a driving shaft rotatably arranged on the side wall of the gear box, an oblique gear fixedly arranged on one end of the driving shaft and engaged with the gear disc, and a driving rod connected with the other end of the driving shaft through a transmission assembly.

[0016] Preferably, the transmission assembly comprises a connecting sleeve slidably arranged on the driving shaft, driving teeth two uniformly arranged on the inner wall of the connecting sleeve, and driving teeth one uniformly arranged on the outer wall of the end of the driving rod adjacent to the driving shaft and engaged with the driving teeth two.

[0017] Preferably, a cylinder two is fixedly arranged on the outer wall of the gear box, the cylinder one and the cylinder two are communicated through a connecting pipe, the cylinder one and the cylinder two are internally arranged with hydraulic oil, the driving shaft is sleeved with a movable plate, and the connecting sleeve is fixedly arranged on the side wall of the movable plate.

[0018] Preferably, a limiting groove is arranged on the side wall of the driving shaft, and a protruding block is arranged on the inner wall of the middle hole of the movable plate and matched with the limiting groove.

[0019] Preferably, a limiting assembly for limiting the position of the movable cylinder is arranged on the fixed cylinder, the limiting assembly comprises a supporting ring fixedly arranged on the inner wall of the fixed cylinder, the supporting ring and the fixed cylinder are arranged with a movable cavity in the middle, a connecting rod is movably arranged in the movable cavity, a wedge-shaped limiting block is fixedly arranged on one end of the connecting rod towards the movable cylinder, a limiting ring groove one and a limiting ring groove two are arranged on the outer wall of the movable cylinder, a square rod is slidably inserted into one end of the connecting rod away from the movable cylinder, and a rotating rod is fixedly arranged on the end of the square rod.

[0020] Preferably, a fixed block is fixedly arranged on the outer wall of the fixed cylinder, the rotating rod passes through the middle hole of the fixed block, a containing groove is arranged in the middle of the side wall of the rotating rod, a clamping block two is movably arranged in the containing groove, a clamping groove is arranged on the inner wall of the middle hole of the fixed block and matched with the clamping block two.

[0021] The beneficial effects of the present application are as follows:

[0022] 1. The positioning structure for hoisting the impeller of the wind turbine in the mountain wind farm, the spatial position of the blade is fixed by arranging the pre-fixing assembly, the movable cylinder is pulled outwards during work, the end thereof is arranged outside the fixed cylinder, the blade is hoisted horizontally by the crane, the blade is butted with the movable cylinder, the bolt holes of the flange two and the flange four are aligned by manually rotating the movable cylinder, and the blade is fixedly arranged through the bolt pair, so that the pre-fixing work of the blade is completed, the pre-fixing work is arranged outside the hub, manual work is not needed inside the hub, the operation process is greatly simplified, and the whole process is more simple and convenient.

[0023] 2. The positioning structure for hoisting the impeller of a wind turbine in a mountainous wind farm, wherein a positioning assembly is arranged to fix the spatial position of the hub, an external driving structure is arranged to drive the rotation of the hub, and an electromagnetic block is arranged to generate a strong magnetic force when supplied with current, when the piston rod moves to a position completely aligned with the movable hole on the cabin sidewall along with the synchronous rotation of the hub, the piston rod is precisely probed outward and smoothly inserted into the movable hole on the cabin sidewall under the magnetic attraction generated by the electromagnetic block, and at this time, one of the fixed cylinders is just rotated to the horizontal position, thus preparing for the subsequent operation. BRIEF DESCRIPTION OF DRAWINGS

[0024] The application will be further described below with reference to the drawings.

[0025] Figure 1 is a perspective view of the application;

[0026] Figure 2 is an internal schematic view of the application;

[0027] Figure 3 is a partial sectional view of the application;

[0028] Figure 4 is Figure 3 is an enlarged view of A in FIG.

[0029] Figure 5 is a sectional view of the connecting assembly in the application;

[0030] Figure 6 is a distribution schematic view of the driving tooth one and the driving tooth two in the application;

[0031] Figure 7 is a schematic view of the connecting sleeve in the application;

[0032] Figure 8 is a sectional view of the fixed cylinder and the movable cylinder in the application;

[0033] Figure 9 is Figure 8 is an enlarged view of B in FIG.

[0034] Figure: 1. Nacelle; 2. Hub; 3. Fixed cylinder; 4. Movable cylinder; 5. Flange 1; 6. Flange 2; 7. Blade; 8. Flange 3; 9. Flange 4; 10. Guide block; 11. Gearbox; 12. Motor; 13. Gear plate; 14. Cylinder 1; 15. Cylinder 2; 16. Connecting plate; 17. Connecting pipe; 18. Housing; 19. Drive rod; 20. Electromagnetic block; 21. Piston rod; 22. Helical gear ; 23. Drive shaft; 24. Movable plate; 25. Connecting sleeve; 26. Limiting groove; 27. Drive tooth 1; 28. Ratchet; 29. ​​Turntable; 30. Through hole; 31. Block 1; 32. Drive tooth 2; 33. Limiting ring groove 1; 34. Limiting ring groove 2; 35. Support ring; 36. Limiting block; 37. Connecting rod; 38. Square rod; 39. Fixed block; 40. Slot; 41. Turntable; 42. Block 2. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0036] Example 1: Figures 1 to 7 As shown, a positioning structure for hoisting a wind turbine impeller in a mountainous wind farm according to an embodiment of the present invention includes:

[0037] A nacelle 1 is provided with a wind turbine generator set 12 inside the nacelle 1. A connecting disc 16 is fixedly connected to the power input shaft of the wind turbine generator set 12. A hub 2 is fixed to the connecting disc 16. A plurality of fixing cylinders 3 are evenly distributed along the circumference on the sidewall of the hub 2. Blades 7 are fixed to the ends of the fixing cylinders 3.

[0038] A pre-fixing assembly is used to pre-fix the spatial position of the blade 7. The pre-fixing assembly includes a movable cylinder 4 arranged inside the fixed cylinder 3. The movable cylinder 4 can extend axially to the outside of the fixed cylinder 3 and be pre-fixedly connected to the root of the blade 7.

[0039] An adjustment assembly for adjusting the blade installation angle, comprising a drive rod 19 and a connecting assembly, wherein the connecting assembly is fixedly disposed in the inner cavity of the movable cylinder 4, the drive rod 19 slidingly passing through the connecting assembly, and the connecting assembly can slide axially along the drive rod 19 to achieve axial extension or retraction of the movable cylinder 4;

[0040] The driving assembly is arranged on the inner side of the wheel hub 2 and is in transmission connection with the driving rod 19 , and is used to drive the driving rod 19 to rotate around its own axis to drive the movable cylinder 4 to rotate synchronously.

[0041] The root of the blade 7 is fixed with a guide block 10, the end of the fixed cylinder 3 is fixed with a flange one 5, the sidewall of the root of the blade 7 is fixed with a flange three 8, the flange one 5 and the flange three 8 are matched, the end of the movable cylinder 4 is fixed with a flange two 6, the sidewall of the guide block 10 is fixed with a flange four 9, the flange two 6 and the flange four 9 are matched;

[0042] In operation, first, the tower is fixed stably to ensure its stability, then the cabin 1 is fixed on the top of the tower by hoisting equipment, then the hub 2 is hoisted by the hoisting equipment and accurately installed on the connecting disc 16, then the angle of the hub 2 is adjusted so that one of the fixed cylinders 3 is rotated to the horizontal position, then the movable cylinder 4 is pulled outward so that the end thereof protrudes to the outside of the fixed cylinder 3 and the position of the movable cylinder 4 is fixed, then the blade 7 is hoisted horizontally by the crane to ensure that the guide block 10 on the root of the blade 7 can be accurately inserted into the inside of the movable cylinder 4, the guide block 10 is arranged to quickly dock the blade 7 with the fixed cylinder 3 to improve the docking speed, then the flange two 6 and the flange four 9 are attached, the movable cylinder 4 is manually rotated, the bolt holes of the flange two 6 and the flange four 9 are aligned, and the movable cylinder 4 is fixed by the bolt pair, thereby completing the pre-fixing of the blade 7, the pre-fixing is performed on the outside of the hub 2 without the need for manual operation on the inside of the hub 2, thereby reducing the safety risk of collision or being pinched and greatly simplifying the operation process to make the whole process simpler and more convenient;

[0043] Then, the blade 7 is moved horizontally by the precise control of the crane to push the movable cylinder 4 back to the inside of the fixed cylinder 3, then the driving assembly is started to drive the driving rod 19 to rotate, the driving rod 19 further drives the movable cylinder 4 to rotate through the connecting assembly, thereby driving the blade 7 to rotate to change the inclination angle of the blade 7, and the flange one 5 and the flange three 8 are fixed by the bolt pair to ensure the accurate positioning and installation of the blade 7, which not only simplifies the aerial positioning work during the installation of the blade 7, but also improves the installation efficiency and practicability to make the whole process more efficient and convenient.

[0044] In addition, the double-layer fixing is realized by the two groups of flanges to make the installation of the blade 7 more stable.

[0045] The positioning assembly is used for fixing the spatial position of the wheel hub 2, and comprises a cylinder I 14 fixed to the inner wall of the wheel hub 2, a piston rod 21 slidingly arranged in the cylinder I 14, and a movable hole adapted to the end of the piston rod 21 formed in the side wall of the wheel hub 2 and the nacelle 1, and an electromagnetic block 20 arranged in the nacelle 1, wherein the electromagnetic block 20 can attract the piston rod 21 to move after being electrified; a gear ring is fixed to the outer wall of the adjacent side edges of the wheel hub 2 and the nacelle 1, a speed reducer and a driving motor are fixed to the top of the nacelle 1, a straight gear is fixed to the power output shaft of the driving motor, the straight gear is engaged with the gear ring, and the gear ring, the speed reducer, the driving motor and the straight gear are not shown in the figure;

[0046] During operation, the driving motor is started, power is transmitted to the gear ring through the straight gear, the gear ring is rotated, the wheel hub 2 is driven to rotate at a slow and stable speed, at the same time, current is supplied to the electromagnetic block 20 to generate a strong magnetic force, when the piston rod 21 is synchronously rotated with the wheel hub 2 and gradually moves to a position completely aligned with the movable hole in the side wall of the nacelle 1, the piston rod 21 is precisely extruded outward and smoothly inserted into the movable hole in the side wall of the nacelle 1 under the magnetic attraction of the electromagnetic block 20, at this time, one of the fixed cylinders 3 is just rotated to the horizontal position, which facilitates the positioning of the fixed cylinder 3 and prepares for subsequent operation; it is worth noting that the cylinder I 14 and the piston rod 21 are designed as three groups and correspond to the three fixed cylinders 3 one by one, which ensures the coordination and stability of the system, when the electromagnetic block 20 is de-energized, the magnetic force disappears, the piston rod 21 is quickly retracted into the cylinder I 14 under the back-pulling action of the spring, thereby canceling the restriction on the wheel hub 2, so that the wheel hub 2 can rotate freely, which facilitates the subsequent rotation of the three fixed cylinders 3 to the horizontal position, and facilitates the installation operation of the blades 7; in addition, a high-precision torque sensor is also installed on the driving motor, which can monitor the change of torque in real time, when the piston rod 21 is inserted into the movable hole in the nacelle 1 and the torque exceeds the preset safety threshold due to rotation obstruction, the sensor will immediately send a signal, the control system will respond quickly to control the driving motor to stop working, thereby effectively preventing the driving motor from being overloaded or damaged, and ensuring the safe and stable operation of the whole system;

[0047] The gear ring, the speed reducer, the driving motor, the straight gear and the torque sensor belong to the disclosed technical field, and the detailed structure, assembly method and use method thereof are well known to those skilled in the art, so they will not be described in detail here.

[0048] The connecting assembly comprises a shell 18, a ratchet wheel 28 fixed to the inner wall of the shell 18, a rotating disc 29 rotatably arranged in the shell 18, a clamping block I 31 elastically connected to the side wall of the rotating disc 29 through a torsional spring, a through hole 30 arranged at the center of the rotating disc 29, and a driving rod 19 slidingly penetrating through the through hole 30 and adapted to the through hole 30.

[0049] When working, the movable cylinder 4 is counterclockwise rotated for pre-fixing work, at this time, the ratchet wheel 28 can smoothly pass through the clamping block one 31, and then the movable cylinder 4 can be rotated to facilitate the alignment of the bolt holes of the flange two 6 and the flange four 9; when the angle of the blade 7 needs to be adjusted, the driving rod 19 is counterclockwise rotated by the driving assembly, and then the rotating disc 29 and the clamping block one 31 are rotated, at this time, the clamping block one 31 and the ratchet wheel 28 are clamped, so that the shell 18, the movable cylinder 4 and the blade 7 are rotated together to adjust the angle of the blade 7.

[0050] The driving assembly comprises a gear box 11 fixedly arranged in the wheel hub 2, a toothed disc 13 rotatably arranged in the gear box 11, a motor 12 fixed to the outer side of the gear box 11 and used for driving the toothed disc 13 to rotate, and a driving shaft 23 rotatably arranged on the side wall of the gear box 11.

[0051] When working, the motor 12 is started, the motor 12 drives the toothed disc 13 to rotate, and then drives the helical gear 22 engaged with the toothed disc 13 to rotate, the helical gear 22 drives the driving shaft 23 to rotate, and the driving shaft 23 drives the driving rod 19 to rotate through the transmission assembly, so as to provide power for the angle adjustment of the blade 7.

[0052] The transmission assembly comprises a connecting sleeve 25 slidably arranged on the driving shaft 23, driving teeth two 32 uniformly distributed on the inner wall of the connecting sleeve 25, and driving teeth one 27 uniformly distributed on the outer wall of the end portion of the driving rod 19 adjacent to the driving shaft 23, the driving teeth one 27 and the driving teeth two 32 being inserted with each other.

[0053] A cylinder body two 15 is fixed to the outer wall of the gear box 11, the cylinder body one 14 and the cylinder body two 15 are communicated through the connecting pipe 17, hydraulic oil is arranged in the cylinder body one 14 and the cylinder body two 15, the end portions of the driving shaft 23 and the driving rod 19 are sealingly and rotatably arranged in the cylinder body two 15, the movable plate 24 is sleeved on the driving shaft 23, the movable plate 24 is sealingly and slidably connected with the inner wall of the cylinder body two 15 and the driving shaft 23 respectively, and the connecting sleeve 25 is fixed to the side wall of the movable plate 24.

[0054] When the piston rod 21 inside the cylinder 14 is attracted by magnetic force and inserted into the movable hole of the side wall of the cabin 1, the hydraulic oil inside the cylinder 14 is simultaneously extruded, and then the hydraulic oil is pressed into the corresponding cylinder 15 through the connecting pipe 17, the movable plate 24 and the connecting sleeve 25 are moved along the driving shaft 23 towards the driving rod, so that the driving teeth two 32 inside the connecting sleeve 25 are inserted with the driving teeth one 27 at the end of the driving rod 19, the driving shaft 23 and the driving rod 19 are connected through the connecting sleeve 25, so as to transmit power from the driving assembly to the driving rod 19 to drive it to rotate; when the electromagnetic block 20 loses power, the return action of the spring will make the piston rod 21 return to the original position, at this time, the hydraulic oil will be sucked back into the cylinder 14 under the action of negative pressure, causing the movable plate 24 and the connecting sleeve 25 to move in the opposite direction, so that the driving shaft 23 and the driving rod 19 are separated. In this way, only one driving rod 19 is connected with the driving assembly each time, ensuring that no interference occurs during the working process.

[0055] The side wall of the driving shaft 23 is provided with a limiting groove 26, and the inner wall of the middle hole of the movable plate 24 is provided with a protrusion, which is matched with the limiting groove 26;

[0056] When working, the limiting groove 26 and the protrusion are arranged to limit the movement direction of the movable plate 24 and the connecting sleeve 25, so that the movable plate 24 and the connecting sleeve 25 can only move along the axis of the driving shaft 23 and rotate synchronously with the driving shaft 23, and cannot move independently.

[0057] Embodiment two: as shown in Figure 8 and Figure 9 Another embodiment of the present application is shown in the comparative embodiment one, wherein the limiting assembly for limiting the position of the movable cylinder 4 is arranged on the fixed cylinder 3, the limiting assembly comprises a supporting ring 35 fixed on the inner wall of the fixed cylinder 3, the supporting ring 35 and the fixed cylinder 3 are provided with a movable cavity in the middle, a connecting rod 37 is movably installed in the movable cavity, a wedge-shaped limiting block 36 is fixed on one end of the connecting rod 37 towards the movable cylinder 4, limiting ring grooves one 33 and two 34 are arranged on the outer wall of the movable cylinder 4, a square rod 38 is slidably inserted at the end of the connecting rod 37 away from the movable cylinder 4, the square rod 38 and the sliding hole arranged at the end of the connecting rod 37 are matched, and can only move linearly along the sliding hole, a rotating rod 41 is fixed on the end of the square rod 38, and the rotating rod 41 extends to the outside of the fixed cylinder 3;

[0058] During operation, when the movable cylinder 4 is located inside the fixed cylinder 3, the limit block 36 is engaged in the limit ring groove 1 33 to limit the movable cylinder 4 to the inside of the fixed cylinder 3. When the movable cylinder 4 is pulled outward, the limit block 36 is engaged in the limit ring groove 1 33. At this time, the end of the movable cylinder 4 is restricted to the outside of the fixed cylinder 3, which is convenient for pre-fixing the blade 7 on the movable cylinder 4. In the process of the movable cylinder 4 protruding outward, the inclined surface of the limit block 36 is facing the inside of the fixed cylinder 3. When the movable cylinder 4 moves outward, the side wall of the limit ring groove 1 33 squeezes the inclined surface of the limit block 36, pushing the limit block 36 and the connecting rod 37 to move toward the inside of the movable cavity, so that the limit block 36 disengages from the limit ring groove 1 33 and Under the action of rebound, it is reinserted into the limiting ring groove 2 34 to limit the movable cylinder 4. At this time, the movable cylinder 4 cannot retract inward, which facilitates the docking of the blade 7 and the movable cylinder 4; when the pre-fixing work is completed, and the movable cylinder 4 is received into the fixed cylinder 3, the rotating rod 41 is then rotated, and the rotating rod 41 drives the connecting rod 37 and the limiting block 36 to rotate 180 degrees through the square rod 38. At this time, the inclined surface of the limiting block 36 faces the outside of the fixed cylinder 3, preventing the movable cylinder 4 from moving outward, so that the angle adjustment process of the blade 7 is more stable; further, a detachable anti-falling block can be provided on the end of the inner side of the movable cylinder 4 to prevent the movable cylinder 4 from easily detaching from the inside of the fixed cylinder 3, and also facilitate the disassembly and assembly of the movable cylinder 4.

[0059] A fixing block 39 is fixed on the outer wall of the fixing cylinder 3, and the rotating rod 41 passes through the middle hole of the fixing block 39. A receiving groove is provided in the middle of the side wall of the rotating rod 41, and a second clamping block 42 is movably installed in the receiving groove. A clamping groove 40 is provided on the inner wall of the middle hole of the fixing block 39, and the clamping groove 40 and the second clamping block 42 are clamped with each other.

[0060] During operation, the spring pushes the card block to be engaged in the card slot 40 to limit the position of the rotating rod 41. The jerking feeling generated during the rotation switching process can prompt the rotation angle of the limit block 36 to accurately change the direction of the inclined surface of the limit block 36.

[0061] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0062] In the description of the application, it is to be understood that the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings and are used only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the application.

[0063] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A positioning structure for hoisting a wind turbine impeller in a mountainous wind farm, characterized by: include: A nacelle (1), wherein a wind turbine generator set (12) is provided inside the nacelle (1), a connecting disc (16) is fixedly connected to a power input shaft of the wind turbine generator set (12), a hub (2) is fixed to the connecting disc (16), a plurality of fixing cylinders (3) are uniformly distributed along the circumference on the side wall of the hub (2), and blades (7) are fixed to the ends of the fixing cylinders (3); A pre-fixing assembly is used to pre-fix the spatial position of the blade (7), the pre-fixing assembly comprising a movable cylinder (4) arranged inside the fixed cylinder (3), the movable cylinder (4) being able to extend axially to the outside of the fixed cylinder (3) and pre-fixedly connected to the root of the blade (7); An adjusting assembly is used to adjust the installation angle of the blade (7), the adjusting assembly comprising a driving rod (19) and a connecting assembly, the connecting assembly being fixedly arranged in the inner cavity of the movable cylinder (4), the driving rod (19) slidingly passing through the connecting assembly, and the connecting assembly being able to slide axially along the driving rod (19) to achieve axial extension or retraction of the movable cylinder (4); The driving assembly is arranged inside the wheel hub (2) and is in driving connection with the driving rod (19) for driving the driving rod (19) to rotate around its own axis to drive the movable cylinder (4) to rotate synchronously.

2. The positioning structure for hoisting a wind turbine impeller in a mountainous wind farm according to claim 1, characterized in that: A guide block (10) is fixed on the root of the blade (7), a flange one (5) is fixed on the end of the fixed cylinder (3), a flange three (8) is fixed on the side wall of the root of the blade (7), and the flange one (5) and the flange three (8) are adapted to each other. A flange two (6) is fixed on the end of the movable cylinder (4), and a flange four (9) is fixed on the side wall of the guide block (10), and the flange two (6) and the flange four (9) are adapted to each other.

3. The positioning structure for hoisting a wind turbine impeller in a mountainous wind farm according to claim 1, characterized in that: The invention also includes a positioning assembly for fixing the spatial position of the wheel hub (2), wherein the positioning assembly includes a cylinder (14) fixed on the inner wall of the wheel hub (2), a piston rod (21) is sealed and slidably installed inside the cylinder (14), and movable holes adapted to the end of the piston rod (21) are provided on the side walls of the wheel hub (2) and the cabin (1), and an electromagnetic block (20) is provided inside the cabin (1), and the electromagnetic block (20) can attract the piston rod (21) to move when energized.

4. The positioning structure for hoisting a wind turbine impeller in a mountainous wind farm according to claim 3, characterized in that: The connecting assembly includes a shell (18), a ratchet (28) is fixed on the inner wall of the shell (18), a turntable (29) is rotatably provided in the middle of the shell (18), a clamping block (31) is elastically connected to the side wall of the turntable (29) through a torsion spring, a through hole (30) is provided in the center of the turntable (29), the driving rod (19) slides through the through hole (30), and the driving rod (19) is adapted to the through hole (30).

5. The positioning structure for hoisting a wind turbine impeller in a mountainous wind farm according to claim 4, characterized in that: The driving assembly comprises a gear box (11) fixedly arranged inside the wheel hub (2), a toothed disc (13) being rotatably mounted inside the gear box (11), a motor (12) for driving the toothed disc (13) to rotate being fixed on the outside of the gear box (11), a driving shaft (23) being rotatably arranged on the side wall of the gear box (11), a bevel gear (22) being fixed at one end of the driving shaft (23), the bevel gear (22) being meshed with the toothed disc (13), and the other end of the driving shaft (23) being connected to a driving rod (19) through a transmission assembly.

6. The positioning structure for hoisting a wind turbine impeller in a mountainous wind farm according to claim 5, characterized in that: The transmission assembly comprises a connecting sleeve (25) slidably mounted on the driving shaft (23), the inner wall of the connecting sleeve (25) is evenly distributed with driving teeth 2 (32), the outer wall of the end portion of the driving rod (19) adjacent to the driving shaft (23) is evenly distributed with driving teeth 1 (27), and the driving teeth 1 (27) and the driving teeth 2 (32) are plugged into each other.

7. The positioning structure for hoisting a wind turbine impeller in a mountainous wind farm according to claim 6, characterized in that: A second cylinder (15) is fixed on the outer wall of the gear box (11), the first cylinder (14) and the second cylinder (15) are connected through a connecting pipe (17), hydraulic oil is provided inside the first cylinder (14) and the second cylinder (15), a movable plate (24) is sleeved on the drive shaft (23), and the connecting sleeve (25) is fixed on the side wall of the movable plate (24).

8. The positioning structure for hoisting a wind turbine impeller in a mountainous wind farm according to claim 7, characterized in that: A limiting groove (26) is provided on the side wall of the driving shaft (23), and a protrusion is provided on the inner wall of the middle hole of the movable plate (24), and the protrusion is adapted to the limiting groove (26).

9. The positioning structure for hoisting a wind turbine impeller in a mountainous wind farm according to claim 1, characterized in that: The fixed cylinder (3) is provided with a limiting assembly for limiting the position of the movable cylinder (4), and the limiting assembly includes a support ring (35) fixed on the inner wall of the fixed cylinder (3), a movable cavity is provided between the support ring (35) and the fixed cylinder (3), a connecting rod (37) is movably installed in the movable cavity, a wedge-shaped limiting block (36) is fixed on one end of the connecting rod (37) facing the movable cylinder (4), a limiting ring groove 1 (33) and a limiting ring groove 2 (34) are provided on the outer wall of the movable cylinder (4), a square rod (38) is slidably inserted into the end of the connecting rod (37) away from the movable cylinder (4), and a rotating rod (41) is fixed on the end of the square rod (38).

10. The positioning structure for hoisting a wind turbine impeller in a mountainous wind farm according to claim 9, characterized in that: A fixing block (39) is fixed on the outer wall of the fixing cylinder (3), the rotating rod (41) passes through the middle hole of the fixing block (39), a receiving groove is provided in the middle of the side wall of the rotating rod (41), a second clamping block (42) is movably installed in the receiving groove, a clamping groove (40) is provided on the inner wall of the middle hole of the fixing block (39), and the clamping groove (40) and the clamping block (42) are clamped with each other.

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