Auxiliary guiding device for hoisting wind turbine nacelle

Abstract

The application discloses a kind of auxiliary guiding devices for hoisting wind turbine nacelle, including machine cabin and tower tube, the top surface of tower tube is circumferentially arranged multiple first connecting holes around its axis, the bottom surface of machine cabin is opened second connecting hole at corresponding first connecting hole, first guide disc is set above tower tube, the top surface of first guide disc is provided with multiple conical guide protrusions, first guide disc is installed on tower tube by buffer structure, detachably installed with second guide disc on machine cabin, conical guide recess is opened in second guide disc at corresponding guide protrusion, and buffer structure is used to slow down the speed of machine cabin drop.The device uses the self-centering characteristics of the conical surface of the conical guide protrusions and the recess to automatically align when the machine cabin is descending, reducing the need for manual adjustment, reducing positioning time, and improving installation accuracy.The buffer structure consumes the kinetic energy of the machine cabin through mechanical or hydraulic damping, avoiding rigid collision between the machine cabin and the tower tube.

Description

Technical Field

[0001] This application relates to the field of wind power installation technology, and in particular to an auxiliary guiding device for hoisting wind turbine nacelles. Background Technology

[0002] Wind power generation is a clean energy technology that uses wind power to drive the rotation of wind turbine blades, converting wind energy into electrical energy. Its core principle is to generate electricity through the energy conversion process of "wind energy → mechanical energy → electrical energy". The core equipment of wind power includes blades, hubs, generators, nacelles, towers, and control systems.

[0003] In wind turbine equipment, the connection between the nacelle and the tower is typically achieved through bolts, nuts, and threaded holes. However, during the hoisting of existing nacelles, due to the considerable height and the influence of wind forces, it is difficult to align the holes on the nacelle and the tower, resulting in prolonged hoisting time and severely impacting the efficiency of wind turbine installation. Utility Model Content

[0004] The main purpose of this application is to propose an auxiliary guiding device for the hoisting of wind turbine nacelles, which aims to solve the problem of low hoisting efficiency caused by the difficulty in aligning the screws and holes on the existing nacelles and towers.

[0005] To achieve the above objectives, the wind turbine nacelle hoisting auxiliary guiding device proposed in this application includes: a nacelle and a tower. Multiple first connecting holes are circumferentially arranged on the top surface of the tower around its axis. Second connecting holes are opened on the bottom surface of the nacelle corresponding to the first connecting holes. A first guide plate is arranged above the tower, and multiple conical guide protrusions are arranged on the top surface of the first guide plate. The first guide plate is mounted on the tower via a buffer structure. A second guide plate is detachably installed on the nacelle, and conical guide grooves are opened on the second guide plate corresponding to the guide protrusions. The buffer structure is used to slow down the descent speed of the nacelle.

[0006] Optionally, the buffer structure is provided in multiple circumferentially arranged around the axis of the first guide disk.

[0007] Optionally, the buffer structure includes a hydraulic cylinder detachably mounted on the side wall of the tower. The upper end of the hydraulic cylinder is provided with a telescopic hydraulic rod, which is detachably connected to the first guide plate. The lower end of the hydraulic cylinder is provided with an inlet and an outlet, and a regulating valve is connected to the inlet and outlet.

[0008] Optionally, the bottom surface of the hydraulic cylinder is symmetrically provided with two mounting plates, which are bolted to the working platform of the tower.

[0009] Optionally, a hydraulic pipe is connected to the regulating valve, and the other end of the hydraulic pipe is connected to a hydraulic oil tank.

[0010] Optionally, a guide hole is provided through the bottom surface of the guide groove, and a vertically arranged guide rod is installed on the guide protrusion.

[0011] Optionally, the guide rod is a conical structure made of an elastic material.

[0012] Optionally, the taper of the outer conical surface of the guide protrusion is greater than the taper of the outer conical surface of the guide rod, and the height of the guide rod is greater than the height of the guide protrusion.

[0013] Optionally, the guide rod is connected to the guide protrusion via a threaded structure.

[0014] Optionally, the number of guide bumps is set to two, and the two guide bumps are symmetrically distributed on the first guide plate.

[0015] This technical solution involves circumferentially arranging multiple first connecting holes on the top surface of the tower along its axis, and corresponding second connecting holes on the bottom surface of the nacelle. A first guide plate is positioned above the tower, with multiple conical guide protrusions on its top surface. The first guide plate is mounted on the tower via a buffer structure. A second guide plate is detachably mounted on the nacelle, with conical guide grooves corresponding to the guide protrusions. The buffer structure slows down the nacelle's descent. During hoisting, firstly, the first guide plate and buffer structure are mounted on the tower, and the second guide plate is mounted at the bottom of the nacelle. Then, the nacelle is hoisted, aligning the guide grooves on the second guide plate with the guide protrusions on the first guide plate, and slowly lowered. The conical surfaces of the multiple guide protrusions engage with the conical surfaces of the corresponding grooves to achieve positioning. The buffer structure slows down the nacelle's descent through damping force. Finally, the second connecting holes of the nacelle align with the corresponding first connecting holes on the tower, and the first and second connecting holes are connected by screws. This device utilizes the self-centering property of the conical guide protrusion and groove to automatically align the nacelle during descent, reducing the need for manual adjustments, minimizing positioning time, and improving installation accuracy. The buffer structure dissipates the nacelle's kinetic energy through mechanical or hydraulic damping, preventing rigid collisions between the nacelle and the tower. This device significantly improves the alignment accuracy between the nacelle and tower through conical guidance, reducing installation errors, shortening high-altitude adjustment time, and increasing hoisting efficiency. The buffer structure reduces hoisting impact, preventing equipment damage and safety accidents. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of the auxiliary guiding device for wind turbine nacelle hoisting in this application, used to guide the hoisting of the nacelle.

[0018] Figure 2 For this application Figure 1 Enlarged schematic diagram of the local structure at point A;

[0019] Figure 3 This is a top view of the first guide plate in the auxiliary guide device for hoisting wind turbine nacelles of this application.

[0020] Explanation of icon numbers:

[0021] 1. Cabin; 2. Tower; 201. Working platform; 3. First connecting hole; 4. Second connecting hole; 5. First guide plate; 502. Guide protrusion; 503. Guide rod; 6. Second guide plate; 601. Guide groove; 602. Guide hole; 7. Buffer structure; 701. Hydraulic cylinder; 702. Hydraulic rod; 8. Bolt.

[0022] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0025] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0027] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0028] In wind power equipment, the connection between the nacelle and the tower is generally achieved through the connection of bolts, nuts and threaded holes. However, during the hoisting of existing nacelles, due to the high hoisting height and the influence of wind force, it is difficult to align the holes on the nacelle and the tower, resulting in a long hoisting time and seriously affecting the efficiency of wind power installation.

[0029] In view of this, this application proposes an auxiliary guiding device for hoisting wind turbine nacelles.

[0030] In the embodiments of this application, reference is made to Figures 1 to 3 The aforementioned auxiliary guiding device for hoisting wind turbine nacelles includes: a nacelle 1 and a tower 2. Multiple first connecting holes 3 are circumferentially arranged around the top surface of the tower 2 along its axis. Second connecting holes 4 are opened on the bottom surface of the nacelle 1 at the locations corresponding to the first connecting holes 3. A first guide plate 5 is arranged above the tower 2. Multiple conical guide protrusions 502 are arranged on the top surface of the first guide plate 5. The first guide plate 5 is mounted on the tower 2 via a buffer structure 7. A second guide plate 6 is detachably installed on the nacelle 1. The second guide plate 6 is mounted on the flange of the nacelle 1 via multiple circumferentially evenly distributed bolts 8. Conical guide grooves 601 are opened on the second guide plate 6 at the locations corresponding to the guide protrusions 502. The buffer structure 7 is used to reduce the descent speed of the nacelle 1.

[0031] Specifically, during hoisting, firstly, the first guide plate 5 and the buffer structure 7 are installed on the tower 2, and the second guide plate 6 is installed at the bottom of the nacelle 1. Then, the nacelle 1 is hoisted, aligning the guide groove 601 on the second guide plate 6 with the guide protrusion 502 on the first guide plate 5, and slowly lowered. The conical surfaces of multiple guide protrusions 502 engage with the conical surfaces of the corresponding grooves to achieve positioning. The buffer structure 7 reduces the descent speed of the nacelle 1 through damping force. Finally, the second connecting hole 4 of the nacelle 1 is aligned with the corresponding first connecting hole 3 of the tower 2, and the first connecting hole 3 and the second connecting hole 4 are connected by screws. This device automatically aligns the nacelle 1 during descent by utilizing the self-centering characteristics of the conical guide protrusions 502 and grooves, reducing the need for manual adjustment, reducing positioning time, and improving installation accuracy. The buffer structure 7 dissipates the kinetic energy of the nacelle 1 through mechanical or hydraulic damping, preventing rigid collision between the nacelle 1 and the tower 2.

[0032] Specifically, both the first guide plate 5 and the second guide plate 6 are annular structures. The outer diameter of the first guide plate 5 is smaller than the inner diameter of the tower 2, which facilitates the disassembly of the first guide plate 5 after the nacelle is hoisted.

[0033] In this embodiment, multiple buffer structures 7 are evenly arranged circumferentially around the axis of the first guide disk 5, preferably six. The buffer structures 7 are evenly distributed along the axis of the first guide disk 5, providing damping force synchronously as the nacelle 1 descends, ensuring balanced force on the first guide disk 5, counteracting the eccentric load on the nacelle 1, and preventing the first guide disk 5 from tilting or jamming. Multiple sets of buffer structures 7 improve system reliability and avoid single-point failures. The evenly distributed buffer force ensures the smooth descent of the first guide disk 5, preventing swaying of the nacelle 1; balanced force reduces local stress concentration on the first guide disk 5 and the tower 2, extending the service life of the equipment.

[0034] In this embodiment, the buffer structure 7 includes a hydraulic cylinder 701 detachably mounted on the side wall of the tower 2. A retractable hydraulic rod 702 is provided at the upper end of the hydraulic cylinder 701, and the hydraulic rod 702 is detachably connected to the first guide plate 5. An inlet and outlet are provided at the lower end of the hydraulic cylinder 701, and regulating valves (not shown in the figure) are connected to the inlet and outlet. When the nacelle 1 descends, hydraulic oil slowly flows out of the hydraulic cylinder 701 through the regulating valve, and the hydraulic rod 702 retracts at a constant speed, providing stable damping force. The retraction speed of the hydraulic rod 702 can be adjusted by the regulating valve, and the oil circuit can also be quickly cut off to achieve emergency braking. The regulating valve can adjust the damping force according to actual working conditions to adapt to different wind speeds and load conditions. The detachable design of the hydraulic cylinder 701 facilitates disassembly and reuse.

[0035] In this embodiment, two mounting plates are symmetrically arranged on the bottom surface of the hydraulic cylinder 701. The mounting plates are connected to the working platform 201 of the tower 2 (not shown in the figure) by bolts 8. The hydraulic cylinder 701 is fixed to the working platform 201 of the tower 2 by the symmetrical mounting plates and bolts 8. The mounting plates on both sides balance the force on the hydraulic cylinder 701, prevent lateral displacement, and ensure a firm installation; it also facilitates the quick assembly and disassembly of the hydraulic cylinder 701 on site.

[0036] In this embodiment, a hydraulic pipe is connected to the regulating valve, and the other end of the hydraulic pipe is connected to a hydraulic oil tank (not shown in the figure). During the buffering process, the hydraulic oil flows back to the oil tank through the regulating valve, reducing energy consumption. The oil tank's heat dissipation function prevents the hydraulic oil from overheating, ensuring system stability. The hydraulic pipe connects the regulating valve and the hydraulic oil tank, forming a closed-loop system, allowing the hydraulic oil to be reused multiple times.

[0037] In this embodiment, a guide hole 602 is provided through the bottom surface of the guide groove 601, and a vertically arranged guide rod 503 is installed on the guide protrusion 502. When the cabin 1 is hoisted, the worker can initially determine the position of the cabin 1 by the relative position of the guide rod 503 and the guide hole 602. As the cabin 1 descends, the guide rod 503 first inserts into the guide hole 602 to achieve initial positioning; the guide rod 503 and the guide hole 602 achieve initial positioning, and the guide protrusion 502 and the groove achieve secondary positioning, thereby improving the positioning accuracy and positioning efficiency in stages.

[0038] In this embodiment, the guide rod 503 is a conical structure made of elastic material, specifically rubber. During the hoisting of the cabin 1, there will be some swaying under the action of external force. When the guide rod 503 made of elastic material is initially connected with the cabin 1, the elastic deformation can consume part of the impact energy, preventing the guide rod 503 from breaking.

[0039] In this embodiment, the taper of the outer conical surface of the guide protrusion 502 is greater than the taper of the outer conical surface of the guide rod 503, and the height of the guide rod 503 is greater than the height of the guide protrusion 502. The conical guide rod 503 acts as a pointer, making it convenient for workers to observe whether the guide rod 503 points to the corresponding guide hole 602.

[0040] In this embodiment, the guide rod 503 is connected to the guide protrusion 502 via a threaded structure. The threaded connection allows for quick on-site installation and removal of the guide rod 503, and guide rods of different lengths can be replaced as needed. After the nacelle 1 is hoisted, the guide rod 503 can be disassembled to avoid interfering with subsequent work.

[0041] In this embodiment, the number of guide bumps 502 is set to two, and the two guide bumps 502 are symmetrically distributed on the first guide disk 5. The symmetrical distribution of the two guide bumps 502 provides two-point support and guidance when the cabin 1 descends. The two points determine a straight line to ensure the accurate positioning of the cabin 1 in the horizontal direction. The symmetrically distributed bumps counteract the torsional moment of the cabin 1 and prevent rotational deviation. The two-point support reduces the number of bumps, thereby reducing material costs and processing complexity. In addition, it avoids the over-positioning problem that may occur with three or more points, ensuring system stability.

[0042] This technical solution involves circumferentially arranging multiple first connecting holes on the top surface of the tower along its axis, and corresponding second connecting holes on the bottom surface of the nacelle. A first guide plate is positioned above the tower, with multiple conical guide protrusions on its top surface. The first guide plate is mounted on the tower via a buffer structure. A second guide plate is detachably mounted on the nacelle, with conical guide grooves corresponding to the guide protrusions. The buffer structure slows down the nacelle's descent. During hoisting, firstly, the first guide plate and buffer structure are mounted on the tower, and the second guide plate is mounted at the bottom of the nacelle. Then, the nacelle is hoisted, aligning the guide grooves on the second guide plate with the guide protrusions on the first guide plate, and slowly lowered. The conical surfaces of the multiple guide protrusions engage with the conical surfaces of the corresponding grooves to achieve positioning. The buffer structure slows down the nacelle's descent through damping force. Finally, the second connecting holes of the nacelle align with the corresponding first connecting holes on the tower, and the first and second connecting holes are connected by screws. This device utilizes the self-centering property of the conical guide protrusion and groove to automatically align the nacelle during descent, reducing the need for manual adjustments, minimizing positioning time, and improving installation accuracy. The buffer structure dissipates the nacelle's kinetic energy through mechanical or hydraulic damping, preventing rigid collisions between the nacelle and the tower. This device significantly improves the alignment accuracy between the nacelle and tower through conical guidance, reducing installation errors, shortening high-altitude adjustment time, and increasing hoisting efficiency. The buffer structure reduces hoisting impact, preventing equipment damage and safety accidents.

[0043] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. An auxiliary guiding device for hoisting a wind turbine nacelle, characterized in that, include: The nacelle and the tower are provided. The top surface of the tower is provided with a plurality of first connecting holes circumferentially around its axis. The bottom surface of the nacelle is provided with second connecting holes corresponding to the first connecting holes. A first guide plate is provided above the tower. The top surface of the first guide plate is provided with a plurality of conical guide protrusions. The first guide plate is mounted on the tower through a buffer structure. A second guide plate is detachably installed on the nacelle. The second guide plate is provided with conical guide grooves corresponding to the guide protrusions. The buffer structure is used to reduce the descent speed of the nacelle.

2. The auxiliary guiding device for hoisting wind turbine nacelles as described in claim 1, characterized in that, The buffer structure is uniformly arranged in multiple circumferential directions around the axis of the first guide disk.

3. The auxiliary guiding device for hoisting wind turbine nacelles as described in claim 2, characterized in that, The buffer structure includes a hydraulic cylinder that is detachably mounted on the side wall of the tower. The upper end of the hydraulic cylinder is provided with a telescopic hydraulic rod, which is detachably connected to the first guide plate. The lower end of the hydraulic cylinder is provided with an inlet and an outlet, and a regulating valve is connected to the inlet and outlet.

4. The auxiliary guiding device for hoisting wind turbine nacelles as described in claim 3, characterized in that, The bottom surface of the hydraulic cylinder is symmetrically provided with two mounting plates, which are bolted to the working platform of the tower.

5. The auxiliary guiding device for hoisting wind turbine nacelles as described in claim 3, characterized in that, The regulating valve is connected to a hydraulic pipe, and the other end of the hydraulic pipe is connected to a hydraulic oil tank.

6. The auxiliary guiding device for hoisting wind turbine nacelles as described in claim 1, characterized in that, A guide hole is provided through the bottom surface of the guide groove, and a vertically arranged guide rod is installed on the guide protrusion.

7. The auxiliary guiding device for hoisting wind turbine nacelles as described in claim 6, characterized in that, The guide rod is a conical structure made of elastic material.

8. The auxiliary guiding device for hoisting wind turbine nacelles as described in claim 6, characterized in that, The taper of the outer cone surface of the guide bump is greater than the taper of the outer cone surface of the guide rod, and the height of the guide rod is greater than the height of the guide bump.

9. The auxiliary guiding device for hoisting wind turbine nacelles as described in claim 6, characterized in that, The guide rod is connected to the guide protrusion via a threaded structure.

10. The auxiliary guiding device for hoisting wind turbine nacelles as described in claim 1, characterized in that, The number of guide bumps is set to two, and the two guide bumps are symmetrically distributed on the first guide plate.

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