Single-hook hoisting and turning-over device for mounting and dismounting large megawatt wind power impeller

Abstract

The invention relates to a single-hook hoisting turnover device for mounting and dismounting a large megawatt wind power impeller, which comprises a main hoisting arm, a transverse swing arm, a driving structure, an impeller upper hoisting seat and an impeller side hoisting seat, a first hoisting point structure is arranged at one end of the transverse swing arm, and a second hoisting point structure is arranged at the other end of the transverse swing arm; a hinge point between the main lifting arm and the transverse swing arm is located between the first lifting point structure and the second lifting point structure, and a connecting point of the first lifting point structure and the impeller upper lifting base and a connecting point of the second lifting point structure and the impeller side lifting base are located on the two sides of an included angle area of the gravity center plumb line of the impeller in the horizontal placing posture and the gravity center plumb line of the impeller in the butt joint posture. Through cooperation of the structures, the purpose that the wind power impeller is hoisted and turned over through a single hook is achieved, compared with a mode of coordinated operation of two cranes, the operation cost and the operation difficulty are reduced, and meanwhile the risk that the cranes and the impeller overturn is also reduced.

Description

Technical Field

[0001] The present application relates to the technical field of wind power construction, and in particular to a single-hook hoisting and turning device for installing and disassembling large-megawatt wind power impellers. Background Art

[0002] Competition in the wind power industry is becoming increasingly fierce, and the market has also put forward higher requirements for cost reduction and efficiency improvement in the process of wind power construction. With the development of large-megawatt wind turbines, the country has also issued policies to support the transformation and upgrading of wind farms to "replace small with large". At present, many wind farms in China have carried out "replace small with large" transformation, which not only reduces the maintenance cost of old equipment, but also expands the capacity of wind farms with limited resources.

[0003] In the prior art, the method for installing the impeller of a wind turbine is as follows: first, assemble the hub and three blades to form an impeller, and place the impeller flat on the ground; then, connect the main hook to the roots of the first blade and the second blade (or to the side of the hub away from the third blade), and connect the auxiliary hook to the third blade; then, simultaneously start the lifting of the main hook and the auxiliary hook to drive the impeller to rise; then, coordinate the operation of the main hook and the auxiliary hook to flip the impeller nearly ninety degrees to a docking posture; and finally, dock and install it with the flange of the nacelle main shaft to complete the assembly of the impeller.

[0004] The impeller disassembly process is the reverse operation of the installation process: connect the main hook to the roots of the first and second blades (or to the side of the hub away from the third blade), connect the auxiliary hook to the third blade, remove the mounting bolts between the impeller and the main shaft of the nacelle, lower the main hook and the auxiliary hook at the same time to lift the impeller out of the nacelle, then coordinate the operation of the main hook and the auxiliary hook to turn the impeller to a horizontal position, and finally lower the main hook and the auxiliary hook at the same time until the impeller lies flat on the ground.

[0005] However, in actual use, the coordinated operation of the main hook and the auxiliary hook has the following problems: the coordinated operation of the main hook and the auxiliary hook requires the cooperation of two cranes, the crane rental cost is high, the construction occupies a large area, and in the process of the two cranes cooperating to turn the impeller over, the auxiliary crane needs to cooperate in the swing arm, lifting arm and lifting hook operations, which is inefficient. If the auxiliary crane is operated improperly and is inclined, there is a risk of overturning; at the same time, the coordinated operation of the main hook and the auxiliary hook has requirements for the rotation angle posture of the auxiliary hoisted blade, which usually requires the blade to be in The reverse propeller position or the forward propeller position has poor resistance to side wind. When encountering a strong wind environment, the auxiliary crane is tied to the blade, and the blade needs to be in a vertical position (that is, the windward side is vertical). After the impeller is lifted, the windward side of the blade is vertical, which will cause the impeller plane to shake greatly, thereby pulling the auxiliary crane to overturn, and then causing the main crane and impeller to overturn, which is easy to cause overturning. The overall installation process is high-risk. In addition, when dismantling the impeller, workers are required to tie the sling connected to the auxiliary hook to the third blade. This process requires high-altitude work, which poses a safety risk. Summary of the invention

[0006] In order to solve the problems of greater difficulty in operation, higher construction cost and safety risks in the construction process when the existing double hooks are used to lift and turn over the impeller, the present application provides a single hook lifting and turning device for installation and disassembly of large megawatt wind turbine impellers.

[0007] The present application provides a single-hook hoisting and turning device for installation and removal of large-megawatt wind turbine impellers, which adopts the following technical solutions: A single-hook lifting and turning device for installing and disassembling large-megawatt wind turbine impellers comprises a main boom, a transverse swing arm rotatably connected to one end of the main boom, a driving structure arranged on the main boom for driving the transverse swing arm to rotate, an impeller upper suspension seat connected to the upper end flange of the impeller hub, and an impeller side suspension seat connected to the side flange of the impeller hub, one end of the transverse swing arm is provided with a first lifting point structure for lifting the impeller upper suspension seat, the other end of the transverse swing arm is provided with a second lifting point structure for lifting the impeller side suspension seat, the hinge point between the main boom and the transverse swing arm is located between the first lifting point structure and the second lifting point structure, the connection point between the first lifting point structure and the impeller upper suspension seat, and the connection point between the second lifting point structure and the impeller side suspension seat are located on both sides of the angle area between the plumb line of the center of gravity of the impeller in a horizontal posture and the plumb line of the center of gravity of the impeller in a docking posture.

[0008] By adopting the above technical scheme, when in use, the impeller upper hanging seat is fixed on the upper end flange of the impeller hub, the impeller side hanging seat is fixed on the side flange of the impeller hub, the crane hook is connected to the end of the main hanging arm, and the impeller upper hanging seat and the impeller side hanging seat are connected to the transverse swing arm through the cooperation of the first hanging point structure and the second hanging point structure. The purpose of lifting the impeller with a single hook can be achieved through the main hanging arm and the transverse swing arm, and then the driving structure is used to drive the transverse swing arm to swing, so as to drive the impeller upper hanging seat and the impeller side hanging seat to move relative to each other in the vertical direction, so as to realize the single-hook lifting and turning operation of the wind turbine impeller. The turning process is simple to operate, and compared with the cooperation of two cranes, The adjustment operation method reduces construction costs, reduces the construction site, and reduces the risk of overturning of the crane and impeller due to human operation during the turning process, thereby improving construction efficiency; at the same time, the turning device is only connected to the hub in the middle of the impeller, so before the impeller is turned over, the windward surface of the blade can be adjusted to a horizontal posture, thereby reducing the horizontal windward area of ​​the blade after the impeller is lifted, and the plane shaking of the impeller has little effect on the single lifting point lifting, thereby solving the problem of overturning caused by sudden strong winds during the turning process, and because it is less affected by wind speed, the construction operation window period is increased; when the impeller is dismantled, there is no need for workers to bundle and connect the third blade, avoiding the risk of high-altitude operations.

[0009] Preferably, the hinge point between the main boom and the transverse swing arm is arranged close to the first suspension point structure.

[0010] By adopting the above technical solution, the distance between the first suspension point structure and the hinge point between the main suspension arm and the transverse swing arm is set to be smaller than the distance between the second suspension point structure and the hinge point between the main suspension arm and the transverse swing arm.

[0011] Preferably, the driving structure includes a hydraulic cylinder arranged on the main boom, a cylinder body end of the hydraulic cylinder is rotatably connected to the main boom, a piston rod end of the hydraulic cylinder is rotatably connected to the transverse swing arm, and the connection point between the piston rod end of the hydraulic cylinder and the transverse swing arm is located between the connection point of the main boom and the transverse swing arm and the second lifting point structure.

[0012] By adopting the above technical solution, when in use, the hydraulic cylinder piston rod is extended and retracted to drive the lateral swing arm to rotate, so that the impeller upper suspension seat and the impeller side suspension seat gradually move relative to each other in the height direction, thereby driving the impeller to rotate and turn over, and the operation is simple and convenient.

[0013] Preferably, one end of the transverse swing arm away from the first suspension point structure is detachably connected to a swing arm suspension seat, and the second suspension point structure is arranged on the swing arm suspension seat.

[0014] By adopting the above technical solution, when in use, by replacing swing arm hangers of different sizes and models and adjusting the distance between the first hanging point structure and the second hanging point structure, the compatibility with different types of impeller hoisting and turning is improved, thereby improving the overall applicability of the turning device.

[0015] Preferably, the first hanging point structure includes a rear pin fixed to an end of the transverse swing arm away from the swing arm suspension seat, an impeller upper sling wrapped around the rear pin, and an upper hanging point shackle arranged at an end of the impeller upper sling away from the rear pin, and the upper hanging point shackle is detachably connected to the impeller upper suspension seat, and the second hanging point structure includes a front pin fixed to the swing arm suspension seat, an impeller side sling wrapped around the front pin, and a side hanging point shackle arranged at an end of the impeller side sling away from the front pin, and the side hanging point shackle is detachably connected to the impeller side suspension seat.

[0016] By adopting the above technical solution, when in use, through the cooperation of the impeller upper sling, the upper sling point shackle, the impeller side sling, and the side sling point shackle, the overall connection is simpler and more convenient to use while ensuring the stability of the connection between the transverse swing arm and the impeller upper suspension seat and the impeller side suspension seat.

[0017] Preferably, the first hanging point structure includes a first pull rod rotatably connected to the end of the transverse swing arm away from the swing arm hanger, and a first swivel pin arranged at the end of the first pull rod away from the transverse swing arm, and the first swivel pin is rotatably connected to the impeller upper hanger, and the second hanging point structure includes a second pull rod rotatably connected to the swing arm hanger, and a second swivel pin arranged at the end of the second pull rod away from the transverse swing arm, and the second swivel pin is rotatably connected to the impeller side hanger.

[0018] By adopting the above technical solution, when in use, through the cooperation of the first pull rod, the first rotation pin, the second pull rod and the second rotation pin, the convenience of assembling the device as a whole and the impeller is improved while ensuring the turning effect of the impeller.

[0019] Preferably, the impeller side hanger includes a triangular connecting plate, a first connecting plate fixed at one end of the triangular connecting plate, and a second connecting plate fixed at the other end of the triangular connecting plate, the first connecting plate and the second connecting plate are both connected to the side wall of the impeller hub, and there is an angle between the line connecting the first connecting plate and the center of gravity of the hub and the line connecting the second connecting plate and the center of gravity of the hub.

[0020] By adopting the above technical solution, when in use, the stability of the connection structure between the impeller side hanger and the impeller hub is ensured through the coordinated use of the triangular connecting plate, the first connecting plate and the second connecting plate.

[0021] Preferably, a main suspension pin shaft is arranged at one end of the main suspension arm away from the lateral swing arm, and a main suspension belt is connected to the main suspension pin shaft.

[0022] By adopting the above technical solution, when in use, the main suspension pin shaft and the main suspension belt are arranged to facilitate the connection between the main suspension arm and the external crane, and the device is more convenient to use.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. The purpose of lifting the impeller with a single hook is achieved through the cooperation of the main boom, the transverse swing arm, the first lifting point structure and the second lifting point structure. The driving structure drives the transverse swing arm to swing, so as to drive the impeller upper suspension seat and the impeller side suspension seat to move relative to each other in the vertical direction, so as to realize the single hook lifting and turning operation of the wind turbine impeller. The turning process is simple to operate. Compared with the coordinated operation of two cranes, the construction cost is reduced, the construction site is reduced, and the risk of overturning of the crane and the impeller due to human operation during the turning process is reduced, thereby improving the construction efficiency. At the same time, the turning device is only connected to the hub in the middle of the impeller, so before the impeller turns over, the wind-receiving surface of the blade can be adjusted to a horizontal posture, so that the horizontal wind-receiving area of ​​the blade is reduced after the impeller is lifted, and the plane shaking of the impeller has little effect on the single lifting point lifting, thereby solving the problem of overturning caused by sudden strong winds during the turning process. Because it is less affected by wind speed, the construction operation window period is increased. When the impeller is dismantled, there is no need for workers to bind and connect the third blade, avoiding the risk of high-altitude operations. 2. Through the connection of the driving structure, the lateral swing arm, the main suspension arm, the first suspension point structure and the second suspension point structure, on the one hand, the turning effect and stability of the impeller are ensured, and on the other hand, when the impeller is docked with the nacelle, the angle of the impeller can be fine-tuned, thereby improving the installation efficiency and quality; 3. This device can be used for impeller installation and impeller removal, and has certain advantages in reducing costs, improving efficiency, and improving equipment and personnel safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram mainly showing the use state of the turning device in the first embodiment of the present application; Figure 2 This is an axonometric diagram mainly showing the structure of the turning device in the first embodiment of the present application; Figure 3 It is a schematic diagram mainly showing the flat-lying posture of the impeller in the first embodiment of the present application; Figure 4 It is a schematic diagram mainly showing the initial lifting state of the impeller in the second embodiment of the present application; Figure 5 It is a schematic diagram mainly showing the turning process of the impeller in the second embodiment of the present application; Figure 6 It is a schematic diagram mainly showing the docking state of the impeller in the second embodiment of the present application; Figure 7It is an axonometric diagram mainly showing the impeller side hanger structure in the third embodiment of the present application; Figure 8 It is an exploded view of the impeller side hanger structure mainly embodied in the third embodiment of the present application.

[0025] 1. Main suspension arm; 2. Articulated pin; 3. Lateral swing arm; 4. Driving structure; 5. Hydraulic cylinder; 6. Cylinder end pin; 7. Rod end pin; 8. Impeller upper suspension seat; 9. Impeller side suspension seat; 10. Triangular connecting plate; 11. Rear seat body; 12. Front cover plate; 13. First connecting plate; 14. Second connecting plate; 15. Connecting hole; 16. Cam; 17. Worm gear; 18. Worm; 19. Driving motor; 20. First suspension point structure; 21. Rear pin; 22. Impeller upper suspension belt; 23. Upper suspension point shackle; 24. First pull rod; 25. First rotating pin; 26. Second suspension point structure; 27. Front pin; 28. Impeller side suspension belt; 29. ​​Side suspension point shackle; 30. Second pull rod; 31. Second rotating pin; 32. Impeller upper suspension belt; 33. Side suspension point shackle; 34. Second pull rod; 35. Second rotating pin; 36. Swing arm suspension seat; 37. Main suspension pin shaft; 38. Main suspension belt. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1 -Attached Figure 8 This application is described in further detail.

[0027] The embodiment of the present application discloses a single-hook hoisting and turning device for installing and disassembling a large-megawatt wind turbine impeller.

[0028] Reference Figure 1 and Figure 2 A single-hook lifting and turning device for installing and disassembling a large-megawatt wind turbine impeller comprises a main boom 1, a transverse swing arm 2, a driving structure 3, an impeller upper suspension seat 4 and an impeller side suspension seat 5. In an initial state, the impeller is horizontally placed on the ground, the main boom 1 is vertically arranged directly above the impeller, a main suspension pin shaft 9 is installed at the top of the main boom 1, a main suspension belt 10 is connected to the main suspension pin shaft 9, and the main suspension belt 10 is used to connect the hook of the crane, the bottom end of the main boom 1 is hinged to the transverse swing arm 2 through a hinge pin shaft 11, and the hinge pin shaft 11 is located at the lowest end of the transverse swing arm 2, a first suspension point structure 6 is arranged at the left end of the transverse swing arm 2, and a second suspension point structure 7 is arranged at the right end of the transverse swing arm 2.

[0029] Reference Figure 1 and Figure 2The impeller upper hanger 4 is connected to the upper end flange of the impeller hub by bolts, and the impeller side hanger 5 is composed of a triangular connecting plate 51, a first connecting plate 52 and a second connecting plate 53. The first connecting plate 52 is welded and fixed to the upper end of the triangular connecting plate 51, and the second connecting plate 53 is welded and fixed to the lower end of the triangular connecting plate 51. The first connecting plate 52 and the second connecting plate 53 are both fixedly connected with the side wall of the impeller hub by bolts. After the impeller side hanger 5 is combined with the impeller hub, there is an angle between the line connecting the first connecting plate 52 and the center of gravity of the hub and the line connecting the second connecting plate 53 and the center of gravity of the hub, so as to ensure the stability of the impeller side hanger 5 when connected to the impeller, thereby ensuring the stability of the subsequent impeller turning over process.

[0030] Reference Figure 1 and Figure 2 When in use, the first hanging point structure 6 is used to connect the impeller upper hanging seat 4 and the left end of the transverse swing arm 2, the second hanging point structure 7 is used to connect the impeller side hanging seat 5 and the right end of the transverse swing arm 2, the driving structure 3 is used to drive the transverse swing arm 2 to rotate, and the rotation of the transverse swing arm 2 synchronously drives the impeller upper hanging seat 4 and the impeller side hanging seat 5 to have relative displacement in the height direction, thereby achieving the purpose of driving the impeller to rotate and turn over. In order to facilitate the rotation of the transverse swing arm 2, in this embodiment, the hinge pin 11 is preferably arranged in the middle of the transverse swing arm 2 near the left end.

[0031] Reference Figure 1 and Figure 2 Under actual working conditions, the method of connecting the impeller upper suspension seat 4 and the impeller side suspension seat 5 with the impeller hub can solve the problem of the wind wheel and the crane overturning due to sudden strong winds during construction. The reason is that the currently commonly used impeller overturning is due to the auxiliary crane hanging point tied to the blade, and the blade needs to be in a vertical posture (that is, the wind-receiving surface is vertical). After the impeller is lifted, if there is a sudden strong wind, the impeller plane will shake greatly due to the vertical wind-receiving surface of the blade, thereby pulling the auxiliary crane upside down and overturning the auxiliary crane, which will cause the main crane and the impeller to overturn.

[0032] Reference Figure 1 and Figure 2 For this turning device, since it is only connected to the hub in the middle of the impeller, the wind-receiving surface of the blade can be adjusted to a horizontal posture in advance when the impeller turns over. In this way, after the impeller is lifted, the horizontal wind-receiving area of ​​the blade is small, the impeller plane sways slightly, and the impeller plane sways little on the single-hanging-point lifting. This can solve the problem of overturning caused by sudden strong winds during the turning process, and because it is less affected by wind speed, the construction operation window period is increased.

[0033] Reference Figure 1 and Figure 2The driving structure 3 includes a hydraulic cylinder 31, the cylinder end of the hydraulic cylinder 31 is hinged on the main boom 1 through a cylinder end pin 32, and the piston rod end of the hydraulic cylinder 31 is hinged on the lateral swing arm 2 through a rod end pin 33. In order to ensure that the piston rod of the hydraulic cylinder 31 can normally drive the lateral swing arm 2 to swing during the extension and retraction process, in the present application, the rod end pin 33 should be arranged between the hinge pin 11 and the second lifting point structure 7. In actual use, the cylinder end pin 32 and the rod end pin 33 are arranged on the same side or opposite side of the main boom 1 without affecting its driving of the lateral swing arm 2. In the present application, the cylinder end pin 32 and the rod end pin 33 are preferably arranged on the right side of the main boom 1.

[0034] Reference Figure 1 and Figure 2 When in use, the piston rod of the hydraulic cylinder 31 is extended and retracted to drive the lateral swing arm 2 to rotate around the hinge pin 11, so that the left and right ends of the lateral swing arm 2 are relatively displaced in the height direction. In conjunction with the first hanging point structure 6 and the second hanging point structure 7, the impeller upper suspension seat 4 and the impeller side suspension seat 5 can be relatively displaced in the height direction, thereby driving the impeller to rotate and turn over, or fine-tuning the angle of the impeller after turning over, thereby ensuring that the impeller is aligned with the flange of the nacelle main shaft in the docking posture.

[0035] Reference Figure 1 and Figure 2 The first hanging point structure 6 is composed of a rear pin shaft 61, an impeller upper hanging belt 62 and an upper hanging point shackle 63. The rear pin shaft 61 is installed at the left end of the transverse swing arm 2, the impeller upper hanging belt 62 is connected to the rear pin shaft 61, the upper hanging point shackle 63 is connected to the bottom end of the impeller upper hanging belt 62, and the upper hanging point shackle 63 is detachably connected to the impeller upper hanging seat 4; in order to improve the overall applicability of the device, a swing arm hanging seat 8 is connected to the right end of the transverse swing arm 2 by bolts, and the second hanging point structure 7 is arranged on the swing arm hanging seat 8, and the second hanging point structure 7 is composed of a front pin shaft 71, an impeller side hanging belt 72 and a side hanging point shackle 73.

[0036] Reference Figure 1 and Figure 2 The front pin shaft 71 is installed on the swing arm suspension seat 8, the impeller side suspension belt 72 is wound on the front pin shaft 71, the side suspension point shackle 73 is connected to the bottom end of the impeller side suspension belt 72, and the side suspension point shackle 73 is detachably connected to the triangular connecting plate 51; when in use, when the hydraulic cylinder 31 drives the swing arm to rotate, under the action of the impeller upper suspension belt 62 and the impeller side suspension belt 72, the impeller upper suspension seat 4 and the impeller side suspension seat 5 can be driven to move relative to each other in the height direction, thereby achieving the purpose of driving the impeller to rotate as a whole. In actual use, the lengths of the impeller upper suspension belt 62 and the impeller side suspension belt 72 can be adjusted or replaced according to the needs of use.

[0037] Reference Figure 1 and Figure 2In addition, for impellers of different specifications and models, there is a certain deviation in the size of the hub. At this time, the swing arm hanger 8 of the corresponding model size can be replaced according to the size of the hub and the position of the impeller upper hanger 4 and the impeller side hanger 5 installed on the hub, so as to adjust the distance between the left and right ends of the transverse swing arm 2 to ensure the subsequent turning effect of impellers of different models, thereby improving the compatibility of the overall device with impeller models.

[0038] Reference Figure 1 and Figure 2 At the same time, in actual working conditions, since the blades of the impeller are tilted upward in the horizontal posture, that is, the center of gravity of the impeller is located above the root of the connection between the three blades and the hub, if the angle required to rotate the impeller from the horizontal posture to the docking posture is set to α, the connection point between the upper hanging point shackle 63 and the impeller upper hanging seat 4 is set as the upper hanging point, and the connection point between the side hanging point shackle 73 and the impeller side hanging seat 5 is set as the side hanging point, then the upper hanging point should be located on the counterclockwise side of the plumb line of the impeller in the horizontal posture, and the angle between the line connecting the upper hanging point and the center of gravity of the impeller and the plumb line of the impeller in the horizontal posture is set to β; the side hanging point should be located on the clockwise side of the plumb line of the impeller in the docking posture, and the angle between the side hanging point and the plumb line of the impeller in the docking posture is set to γ.

[0039] Reference Figure 1 and Figure 3 In actual working conditions, the angle range of α is approximately between 80 and 90 degrees, that is, the impeller needs to rotate about 80 to 90 degrees to flip from a flat position to a docking position. During this process, angle β and angle γ are redundancies of the two extreme positions of the relative flipping process. That is to say, for impellers of the same size and model, as long as the turning device and the impeller are assembled together, the upper hanging point and the side hanging point are respectively within the range of angle β and angle γ, the turning effect of the impeller can be ensured, thereby improving the compatibility of the turning device as a whole with the deviation of the center of gravity of the same model of impeller. In the present application, angle β and angle γ are preferably set to between about 10 and 15 degrees.

[0040] Reference Figure 1 and Figure 2 At the same time, according to the setting relationship of the above-mentioned angle α, angle β and angle γ, a plurality of connecting holes 54 connected to the side hanging point shackle 73 are set on the impeller side hanger 5, and a height difference is made between the plurality of connecting holes 54 in the height direction, so that the connection point position of the side hanging point shackle 73 and the impeller side hanger 5 can be adjusted as needed, that is, the position of the side hanging point is changed, thereby changing the size of the angle γ, thereby reducing the influence of different impeller center of gravity tolerances on the turning effect, and further ensuring the overall applicability of the device.

[0041] Reference Figure 1The turning device of the present application adopts the above-mentioned installation and use sequence to realize the hoisting and turning over of the wind turbine impeller. When the turning device is used in reverse, the purpose of disassembling and replacing the installed wind turbine impeller can also be achieved. In addition, a simple deformation of the turning device of the present application can also be used for the turning and hoisting of the hub (impeller without blades), and it has strong applicability.

[0042] The implementation principle of the embodiment of the present application is as follows: when in use, the assembled impeller is placed flat on the ground, and the upper impeller suspension seat 4 and the side impeller suspension seat 5 are respectively installed and fixed on the upper end flange and the side flange of the impeller hub, so that two suspension point positions, the upper suspension point and the side suspension point, are formed between the impeller hub and the entire device. Then, the hook of the crane is connected and fixed to the main sling 10, and the main boom 1 is lifted through the main sling 10. Oil is supplied to the rodless cavity of the hydraulic cylinder 31 to extend the piston rod of the hydraulic cylinder 31, so that the lateral swing arm 2 swings clockwise, and the staff connects the upper suspension point shackle 63 and the side suspension point shackle 73 to the impeller upper suspension seat 4 and the impeller hub, respectively. When the side suspension seat 5 is connected, the main suspension arm 1 can be forced by the crane to lift the impeller; when the impeller needs to be turned over, it is only necessary to control the piston rod of the hydraulic cylinder 31 to retract, driving the transverse swing arm 2 to rotate counterclockwise, and the impeller can be rotated under the pulling action of the impeller upper sling 62 and the impeller side sling 72 until the impeller is turned from a flat posture to a docking posture, and then the impeller is lifted to the cabin at the top of the tower by the crane for installation and docking. During the docking process, the hydraulic cylinder 31 can also be used to drive the transverse swing arm 2 to rotate, so as to achieve a slight adjustment of the angle of the impeller, thereby ensuring the quality and efficiency of the docking installation of the impeller and the cabin.

[0043] Embodiment 2: Reference Figure 4 , Figure 5 and Figure 6 The difference between this embodiment and embodiment 1 is that the first suspension point structure 6 is composed of a first tie rod 64 and a first swivel pin 65, one end of the first tie rod 64 is hinged to the left end of the transverse swing arm 2, the first swivel pin 65 is installed on the impeller upper suspension seat 4, and the other end of the first tie rod 64 is hinged to the impeller upper suspension seat 4 through the first swivel pin 65, and the second suspension point structure 7 is composed of a second tie rod 74 and a second swivel pin 75, one end of the second tie rod 74 is hinged to the swing arm suspension seat 8, the second swivel pin 75 is installed on the impeller side suspension seat 5, and the other end of the second tie rod 74 is hinged to the impeller side suspension seat 5 through the second swivel pin 75.

[0044] Reference Figure 4 , Figure 5 and Figure 6In actual use, the first pull rod 64 and the second pull rod 74 of different lengths can be replaced as needed to improve the compatibility of the overall device with different types of hubs or impellers. At the same time, the first pull rod 64 and the second pull rod 74 can also be replaced with a structure with a power telescopic function, such as a telescopic electric cylinder, a winch, etc., so that during the turning process, the distance between the lateral swing arm 2 and the upper hanging point and the side hanging point of the hub can be adjusted through its power telescopic function, which is suitable for different turning needs and more convenient to use.

[0045] Embodiment 3: Reference Figure 7 and Figure 8 , the difference between this embodiment and embodiment 1 is that a cam 55 is rotatably connected to the triangular connecting plate 51, a worm wheel 56 is fixed to one end of the cam 55, a worm 57 is rotatably connected to the impeller side hanger 5, the worm wheel 56 and the worm 57 are arranged in cooperation, a driving motor 58 is installed on the impeller side hanger 5, the output shaft of the driving motor 58 is coaxially fixedly connected to the worm 57, and the side hanging point shackle 73 is connected to the end of the cam 55 away from the worm wheel 56; when in use, the worm 57 is driven to rotate by the rotation of the output shaft of the driving motor 58, the rotation of the worm 57 synchronously drives the worm wheel 56 to rotate, and the rotation of the worm wheel 56 drives the cam 55 to swing, thereby driving the side hanging point shackle 73 and the connection point of the impeller side hanger 5 to swing, thereby realizing the adjustment of the side hanging point in the height direction, thereby reducing the influence of the center of gravity tolerance of impellers of different specifications on the impeller turning process, and ensuring that the hub flange and the nacelle main shaft flange are fully aligned during docking.

[0046] Reference Figure 7 and Figure 8 At the same time, the above structure is used to realize the method of electrically adjusting the position of the side hanging point. Compared with the method of manually adjusting the connection point position of the side hanging point shackle 73 and the impeller side hanger 5, there is no need to repeatedly disassemble the connection between the side hanging point shackle 73 and the impeller side hanger 5, which is more convenient to use and safer.

[0047] Reference Figure 7 and Figure 8 When in use, it should be noted that after the side lifting point position is hoisted using the above-mentioned structure, the length of the impeller side sling 72 needs to be replaced to ensure that the impeller side sling 72 and the impeller main sling 10 are always kept in a taut state under working conditions, so as to ensure the turning quality. In this embodiment, in order to facilitate use and reduce the number of replacements of the impeller side sling 72, the impeller side sling 72 and the impeller upper sling 62 can be replaced by a winch, a telescopic electric cylinder and other power telescopic structures, among which a winch is preferably set; that is, before the worm wheel 56 and the worm 57 are driven by the driving motor 58, first ensure that the chain of the winch has sufficient length adjustment, and when the side lifting point position is fixed, the chain also needs to be reeled in by the winch to ensure the overall tension.

[0048] Reference Figure 7 and Figure 8 In this embodiment, the triangular connecting plate 51 includes a rear seat body 511 and a front cover plate 512. Both ends of the rear seat body 511 are connected with the wheel hub bolts. An installation cavity is opened on the rear seat body 511. The worm wheel 56, the worm 57 and the drive motor 58 are all arranged in the installation cavity. The part of the cam 55 connected with the worm wheel 56 is located in the installation cavity. The other part of the cam 55 extends out of the installation cavity and is connected with the side hanging point shackle 73. The front cover plate 512 is bolted to the rear seat body 511, and the front cover plate 512 is used to block the installation cavity. When in use, the worm wheel 56, the worm 57 and the drive motor 58 are all sealed in the installation cavity through the cooperation of the rear seat body 511 and the front cover plate 512, so as to reduce the interference of environmental factors on the above-mentioned transmission structure, thereby ensuring its normal use.

[0049] The implementation principle of the embodiment of the present application is as follows: when in use, the assembled impeller is placed flat on the ground, and the impeller upper suspension seat 4 and the impeller side suspension seat 5 are respectively installed and fixed on the upper end flange and the side flange of the impeller hub, so that two suspension point positions, the upper suspension point and the side suspension point, are formed between the impeller hub and the entire device. Then, the hook of the crane is connected and fixed to the main sling 10, and the main boom 1 is lifted through the main sling 10. Oil is supplied to the rodless cavity of the hydraulic cylinder 31 to extend the piston rod of the hydraulic cylinder 31, so that the lateral swing arm 2 swings clockwise, and the staff connects the upper suspension point shackle 63 and the side suspension point shackle 73 to the impeller upper suspension seat 4 and the impeller side suspension seat 5 respectively, so that force can be applied to the main boom 1 through the crane to lift the impeller Lift it up. When the chain of the winch is tightened, the position of the side hanging point can be adjusted according to the angle of the line connecting the upper hanging point, the side hanging point and the center of gravity of the impeller in this state to ensure that the subsequent turning angle is smaller than the angle of the line connecting the upper hanging point, the side hanging point and the center of gravity of the impeller; after the adjustment is completed, the hydraulic cylinder 31 can be used to drive the transverse swing arm 2 to swing, thereby driving the impeller to rotate, until the impeller is turned from a flat posture to a docking posture, and then the impeller is lifted to the cabin at the top of the tower by the crane for installation and docking. During the docking process, the hydraulic cylinder 31 and the reeling and unreeling of the winch chain can also be used to drive the transverse swing arm 2 to rotate, so as to achieve a slight adjustment of the angle of the impeller, thereby ensuring the quality and efficiency of the docking installation of the impeller and the cabin.

[0050] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. Single hook hoisting and turning device for installation and removal of large megawatt wind turbine impeller, characterized by: The invention comprises a main suspension arm (1), a transverse swing arm (2) rotatably connected to one end of the main suspension arm (1), a driving structure (3) arranged on the main suspension arm (1) for driving the transverse swing arm (2) to rotate, an impeller upper suspension seat (4) for connecting to the upper end flange of the impeller hub, and an impeller side suspension seat (5) for connecting to the side flange of the impeller hub, wherein one end of the transverse swing arm (2) is provided with a first suspension point structure (6) for lifting the impeller upper suspension seat (4), and the other end of the transverse swing arm (2) is provided with a second suspension point structure (7) for lifting the impeller side suspension seat (5), the hinge point between the main suspension arm (1) and the transverse swing arm (2) is located between the first suspension point structure (6) and the second suspension point structure (7), and the connection point between the first suspension point structure (6) and the impeller upper suspension seat (4) and the connection point between the second suspension point structure (7) and the impeller side suspension seat (5) are located on both sides of the angle area between the vertical line of the center of gravity of the impeller in a horizontal position and the vertical line of the center of gravity of the impeller in a docking position.

2. The single-hook hoisting and turning device for installing and removing a large megawatt wind turbine impeller according to claim 1 is characterized in that: The hinge point between the main suspension arm (1) and the transverse swing arm (2) is arranged close to the first suspension point structure (6).

3. The single-hook hoisting and turning device for installing and removing a large megawatt wind turbine impeller according to claim 1 is characterized in that: The driving structure (3) comprises a hydraulic cylinder (31) arranged on the main boom (1), the cylinder body end of the hydraulic cylinder (31) is rotatably connected to the main boom (1), the piston rod end of the hydraulic cylinder (31) is rotatably connected to the transverse swing arm (2), and the connection point between the piston rod end of the hydraulic cylinder (31) and the transverse swing arm (2) is located between the connection point of the main boom (1) and the transverse swing arm (2) and the second suspension point structure (7).

4. The single-hook hoisting and turning device for installing and removing a large megawatt wind turbine impeller according to claim 1 is characterized in that: One end of the transverse swing arm (2) away from the first suspension point structure (6) is detachably connected to a swing arm suspension seat (8), and the second suspension point structure (7) is arranged on the swing arm suspension seat (8).

5. The single-hook hoisting and turning device for installing and removing a large megawatt wind turbine impeller according to claim 4 is characterized in that: The first suspension point structure (6) comprises a rear pin shaft (61) fixed to an end of the transverse swing arm (2) away from the swing arm suspension seat (8), an impeller upper suspension belt (62) wound around the rear pin shaft (61), and an upper suspension point shackle (63) arranged at an end of the impeller upper suspension belt (62) away from the rear pin shaft (61), wherein the upper suspension point shackle (63) is detachably connected to the impeller upper suspension seat (4); and the second suspension point structure (7) comprises a front pin shaft (71) fixed to the swing arm suspension seat (8), an impeller side suspension belt (72) wound around the front pin shaft (71), and a side suspension point shackle (73) arranged at an end of the impeller side suspension belt (72) away from the front pin shaft (71), wherein the side suspension point shackle (73) is detachably connected to the impeller side suspension seat (5).

6. The single-hook hoisting and turning device for installing and removing a large megawatt wind turbine impeller according to claim 4 is characterized in that: The first suspension point structure (6) includes a first tie rod (64) rotatably connected to the end of the transverse swing arm (2) away from the swing arm suspension seat (8), and a first swivel pin (65) arranged at the end of the first tie rod (64) away from the transverse swing arm (2), and the first swivel pin (65) is rotatably connected to the impeller upper suspension seat (4). The second suspension point structure (7) includes a second tie rod (74) rotatably connected to the swing arm suspension seat (8), and a second swivel pin (75) arranged at the end of the second tie rod (74) away from the transverse swing arm (2), and the second swivel pin (75) is rotatably connected to the impeller side suspension seat (5).

7. The single-hook hoisting and turning device for installing and removing a large megawatt wind turbine impeller according to claim 1 is characterized in that: The impeller side hanger (5) comprises a triangular connecting plate (51), a first connecting plate (52) fixed to one end of the triangular connecting plate (51), and a second connecting plate (53) fixed to the other end of the triangular connecting plate (51), the first connecting plate (52) and the second connecting plate (53) being connected to the side wall of the impeller hub, and an angle exists between a line connecting the first connecting plate (52) and the center of gravity of the hub and a line connecting the second connecting plate (53) and the center of gravity of the hub.

8. The single-hook hoisting and turning device for installing and removing a large megawatt wind turbine impeller according to claim 1 is characterized in that: A main suspension pin shaft (9) is arranged at one end of the main suspension arm (1) away from the transverse swing arm (2), and a main suspension belt (10) is connected to the main suspension pin shaft (9).

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