Wind power operation and maintenance blade vertical replacement device and replacement method

Abstract

The invention discloses a wind power operation and maintenance blade vertical replacement device and method, and belongs to the technical field of wind turbine generator maintenance. The suspension assembly is connected with the inner wall of a hub; one end of the pulley assembly is connected with the suspension assembly, and the other end is connected with a second hanger; one side, far away from the pulley assembly, of the second lifting appliance is detachably connected with the blade; the adjusting assemblies are symmetrically arranged on two sides of the pulley assembly, one end of each adjusting assembly is connected with the suspension assembly, and the other end is connected with a first lifting appliance; the end, away from the adjusting assembly, of the first lifting appliance is detachably connected with the blade. Through mutual cooperation of the hanging assembly, the pulley assembly, the adjusting assembly, the second lifting appliance and the first lifting appliance, under the condition that a large-tonnage high-altitude lifting crane is not used, the operation of finding the gravity center position of the blade is omitted, replacement of the blade can be achieved, dependence on the gravity center position is low, operation is convenient and safe, and applicability is high.

Description

Technical Field

[0001] This invention relates to the field of wind turbine maintenance technology, specifically to a vertical replacement device and method for wind turbine blades. Background Technology

[0002] Based on the current situation in my country, the wind power industry is developing very rapidly, with the installed capacity increasing and the number of wind turbines growing. Wind turbine blades operate in harsh environments such as the outdoors and during thunderstorms for extended periods, making them highly susceptible to wear, cracking, and weakening. This can damage the wind turbine blades, causing uneven stress on the turbine and posing a risk of turbine collapse, resulting in personal and property losses and safety accidents.

[0003] To avoid accidents, blades must be replaced once they are damaged to a certain extent. The conventional method is to use a large-tonnage crane to lift or clamp the blades for replacement. This method requires a high degree of precision in the blade's center of gravity position; otherwise, it is very easy to cause damage to the hub or even the crane to overturn when the blade is removed from the hub. However, due to various uncertainties such as wear, aging, and moisture caused by long-term operation, the blade's center of gravity position may shift, making it difficult to find the accurate position of the center of gravity.

[0004] Therefore, it is necessary to provide a vertical replacement device and method for wind turbine blades. Summary of the Invention

[0005] The purpose of this invention is to provide a vertical replacement device and method for wind turbine blades, so as to solve the problem that the blade center of gravity position is highly required when using a large-tonnage crane to lift or clamp the blades for replacement at high altitude in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A wind turbine blade vertical replacement device includes: Suspension components connected to the inner wall of the wheel hub; The pulley assembly has one end connected to the suspension assembly and the other end connected to a second lifting device; the side of the second lifting device away from the pulley assembly is used for detachable connection with the blade. An adjustment assembly is symmetrically arranged on both sides of the trolley assembly. One end of the adjustment assembly is connected to the suspension assembly, and the other end is connected to a first lifting device. The end of the first lifting device away from the adjustment assembly is used for detachable connection with the blade.

[0007] Furthermore, it also includes: a winch connected to the ground or the inner wall of the hub, a bracket detachably connected to the inner wall of the hub, and a rope; the fixed end of the rope is connected to the winch, and the other end extends out of the winch and passes through the bracket to connect to the trolley assembly.

[0008] Furthermore, the support is rotatably connected with rollers and shafts. There are two sets of rollers, with two rollers in each set. One set of rollers is rotatably connected to the side of the support near the trolley assembly via the shafts, and the two rollers are arranged vertically. The other set of rollers is rotatably connected to the side of the support near the winch via the shafts, and the two shafts are arranged side by side with a gap. The rope extends out of the winch, winds between the two parallel rollers, and then passes through the two vertically arranged rollers to connect with the trolley assembly.

[0009] Furthermore, the hub has a first opening for extending the first lifting device out of the hub, and the hub has a second opening for extending the second lifting device out of the hub. There are two first openings, and the two first openings are respectively located on both sides of the second opening.

[0010] Furthermore, the adjustment component is one of a telescopic chain hoist, lever hoist, winch, hydraulic cylinder, or electric hoist.

[0011] Furthermore, the trolley assembly is a pulley block structure.

[0012] A method for replacing the vertical replacement device for wind turbine blades as described above includes the following steps: S1, the first lifting device is connected to the end of the blade, the bolts between the blade and the hub are removed, and the blade and hub are separated to a predetermined distance by adjusting the assembly; S2, connect the second lifting device to the end of the blade, and separate the first lifting device from the blade; after the second lifting device moves the blade downward to the predetermined position by the pulley assembly, the second lifting device separates from the blade; S3, connect the second lifting device to the end of the next blade, and use the pulley assembly to move the blade towards the hub using the second lifting device; S4, when the blade and the hub are spaced at a predetermined distance, the first lifting device is connected to the end of the blade, and the second lifting device is separated from the end of the blade; S5, after the blade comes into contact with the hub, the blade and hub are fixedly connected by bolts, and the first lifting device is separated from the end of the blade.

[0013] Furthermore, a ground crane is used to assist in the tailing of the blades during the replacement process.

[0014] The present invention has the following beneficial effects: This invention, through the coordinated operation of the suspension assembly, pulley assembly, adjustment assembly, second lifting device, and first lifting device, enables blade replacement without the need for a heavy-duty high-altitude crane, eliminating the need to locate the blade's center of gravity. It exhibits low dependence on the center of gravity, is convenient and safe to operate, has wide applicability, and low requirements for the ground conditions, allowing for use in most environments. This not only saves on transportation costs and the high expenses associated with selecting heavy-duty cranes but also improves work efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the initial state of the wind turbine impeller blades in the wind power operation and maintenance vertical replacement device and replacement method provided by the present invention. Figure 2 This is an enlarged structural schematic diagram of the installation state of the blade before separation from the hub in the wind power operation and maintenance blade vertical replacement device and replacement method provided by the present invention. Figure 3 This is an enlarged structural schematic diagram of the blade separating from the hub in the wind power operation and maintenance blade vertical replacement device and replacement method provided by the present invention. Figure 4 This is an enlarged structural diagram of the assembly state of the wind power operation and maintenance blade vertical replacement device and replacement method provided by the present invention after the blade and hub are initially separated. Figure 5 This is an enlarged structural diagram of the blade after separation from the hub in the wind power operation and maintenance blade vertical replacement device and replacement method provided by the present invention.

[0016] Figure 6 This is a schematic diagram of the blade replacement process in the wind power operation and maintenance blade vertical replacement device and replacement method provided by the present invention.

[0017] The components include: 1. Suspension assembly; 2. Adjustment assembly; 3. Second lifting device; 4. Winch; 5. Pulley assembly; 6. Bracket; 7. Blade; 8. Hub; 9. First lifting device. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application. Example

[0019] Reference Figure 1-6In this embodiment, a wind turbine blade vertical replacement device includes a suspension assembly 1 connected to the inner wall of a hub 8, wherein the suspension assembly 1 is preferably a suspension ring structure. In other embodiments, the suspension assembly 1 may be installed on a pitch bearing or other suitable lifting location.

[0020] One end of the trolley assembly 5 is connected to the suspension assembly 1, and the other end extends out of the hub 8 and is connected to the second lifting device 3. The side of the second lifting device 3 away from the trolley assembly 5 is detachably connected to the flange on the blade 7. The second lifting device 3 is designed with a rotating lifting point for connecting the trolley assembly 5. The trolley assembly 5 is a pulley block structure composed of a movable pulley and a fixed pulley.

[0021] Adjustment components 2 are symmetrically arranged on both sides of the trolley assembly 5 and are used for adjusting the distance between the blades and the hub. One end of the adjustment component 2 is connected to the suspension assembly 1, and the other end is connected to the first lifting device 9; the end of the first lifting device 9 away from the adjustment component 2 is detachably connected to the flange on the blade 7. In this embodiment, the adjustment component 2 has a telescopic function and is preferably one of a chain hoist, lever hoist, winch 4, hydraulic cylinder, or electric hoist.

[0022] The wind turbine blade vertical replacement device provided in this embodiment, through the cooperation of the suspension assembly 1, pulley assembly 5, adjustment assembly 2, second lifting device 3, and first lifting device 9, can replace blades without the need for a large-tonnage high-altitude crane, eliminating the need to locate the blade's center of gravity. It has low dependence on the center of gravity position, is convenient and safe to operate, has strong applicability, and low requirements for the ground conditions, making it usable in most environments. It not only saves on transportation costs but also the high cost of selecting a large-tonnage crane, and improves work efficiency. It solves the problem in existing technologies where using large-tonnage cranes for high-altitude blade lifting or clamping requires precise positioning of the blade's center of gravity.

[0023] It should be noted in detail that the vertical replacement device for wind turbine blades in this embodiment further includes: a winch 4 connected to the ground or the inner wall of the hub 8, a bracket 6 detachably connected to the inner wall of the hub 8, and a rope; the fixed end of the rope is connected to the winch 4, and the other end extends out of the winch 4 and passes through the bracket 6 to connect to the pulley assembly 5. The bracket 6 is used to convert the direction of force on the wire rope.

[0024] Specifically, the winch 4 can control its speed via a frequency converter, and its rated load is adapted to the hoisting requirements of large and medium-sized wind turbine blades. It can complete core processes such as blade-hub docking and blade attitude adjustment. In this embodiment, the winch 4 provides power for the entire replacement process, and its power is transmitted to the blade flange through the steering bracket 6, the trolley assembly 5, and the second lifting device 3.

[0025] More specifically, the support 6 is rotatably connected with rollers and shafts. There are two sets of rollers, with two rollers in each set. One set of rollers is rotatably connected to the side of the support 6 near the trolley assembly 5 via shafts, and the two rollers are arranged vertically. The other set of rollers is rotatably connected to the side of the support 6 near the winch 4 via shafts, and the two shafts are arranged side by side with intervals. After the rope extends out of the winch 4, it winds between the two parallel rollers, and then passes through the two vertically arranged rollers to connect with the trolley assembly 5.

[0026] It should be further explained that, in this embodiment, the hub 8 has a first opening for the first lifting device 9 to extend out of the hub 8, and a second opening for the second lifting device 3 to extend out of the hub 8. There are two first openings, one on each side of the second opening. Each of the two first openings and one second opening corresponds to the installation of one blade. The second lifting device 3 has two connections to the flange on the blade, symmetrical about the center of the flange. The two first openings each have two connections to the flange on the blade, eliminating the need to locate the blade's center of gravity, thus enabling blade replacement. This reduces dependence on the center of gravity, making operation convenient, safe, and highly adaptable. It has low requirements for the ground surface and can be used in most environments. This not only saves on transportation costs but also the high cost of selecting a large-tonnage crane, and improves work efficiency. Example

[0027] This embodiment provides a method for replacing the vertical replacement device for wind turbine blades, which is the same method provided in Embodiment 1. The method specifically includes the following steps: S1, the first lifting device 9 is connected to the end of the blade 7, the bolts between the blade 7 and the hub 8 are removed, and the blade 7 and the hub 8 are separated to a predetermined distance by adjusting the assembly 2; S2, connect the second lifting device 3 to the end of the blade 7, and separate the first lifting device 9 from the blade 7; after the second lifting device 3 drives the blade 7 to move downward to the predetermined position through the trolley assembly 5, the second lifting device 3 separates from the blade 7; S3, connect the second lifting device 3 to the end of the next blade 7, and use the trolley assembly 5 to move the second lifting device 3 towards the hub 8; S4, when the blade 7 and the hub 8 are spaced at a predetermined distance, the first lifting device 9 is connected to the end of the blade 7, and the second lifting device 3 is separated from the end of the blade 7; S5, after the blade 7 comes into contact with the hub 8, the blade 7 and the hub 8 are fixedly connected by bolts, and the first lifting device 9 is separated from the end of the blade 7.

[0028] In the replacement process provided in this embodiment, a ground crane is used to assist the tail of blade 7 to ensure its safety.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0031] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0032] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0033] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A wind power operation and maintenance blade vertical replacement device, characterized in that, The utility model relates to a kind of blade lifting device, including: Suspension assembly (1) is connected with the inner wall of hub (8); Trolley assembly (5) is connected with the suspension assembly (1) at one end, and second lifting appliance (3) is connected at the other end;The side of the second lifting appliance (3) away from the trolley assembly (5) is used to be detachably connected with blade (7); Adjustment assembly (2) is symmetrically arranged on both sides of the trolley assembly (5), one end of the adjustment assembly (2) is connected with the suspension assembly (1), and first lifting appliance (9) is connected at the other end;The end of the first lifting appliance (9) away from the adjustment assembly (2) is used to be detachably connected with the blade (7).

2. The wind power operation and maintenance blade vertical replacement device according to claim 1, characterized in that, Further including: Winch (4) is connected with ground or the inner wall of hub (8), bracket (6) is detachably connected with the inner wall of hub (8), and rope;The fixed end of the rope is connected with the winch (4), and the other end is connected with the trolley assembly (5) after passing through the bracket (6) after extending out of the winch (4).

3. The wind power operation and maintenance blade vertical replacement device according to claim 2, characterized in that, Roller and roller shaft are rotatably connected on the bracket (6), the number of the roller is two groups, and the number of each group of the roller is two;One group of the roller is rotatably connected on the side of the bracket (6) close to the trolley assembly (5) by the roller shaft, and the two rollers are arranged in cooperation up and down;Another group of the roller is rotatably connected on the side of the bracket (6) close to the winch (4) by the roller shaft, and the two roller shafts are arranged in parallel and interval;The rope is wound between the two rollers arranged in parallel after extending out of the winch (4), then passes out from the two rollers arranged up and down and is connected with the trolley assembly (5).

4. The wind power operation and maintenance blade vertical replacement device according to claim 1, characterized in that, The first opening for the first lifting appliance (9) to extend out of the hub (8) is formed on the hub (8), the second opening for the second lifting appliance (3) to extend out of the hub (8) is formed on the hub (8), the number of the first opening is two, and the two first openings are arranged on both sides of the second opening respectively.

5. The wind power operation and maintenance blade vertical replacement device according to claim 2, characterized in that, The adjustment assembly (2) is one of hand-operated hoist, hand-operated lever hoist, winch (4), hydraulic cylinder or electric hoist.

6. The wind power operation and maintenance blade vertical replacement device according to claim 1, characterized in that, The trolley assembly (5) is a pulley block structure.

7. A method of replacing a wind power O&M blade vertical replacement device according to any of claims 1-6, characterized in that, Including the following steps: S1, the end of the first lifting appliance (9) is connected with the blade (7), the bolt between the blade (7) and the hub (8) is removed, and the blade (7) is separated from the hub (8) to a predetermined distance by the adjustment assembly (2); S2, the end of the second lifting appliance (3) is connected with the blade (7), and the first lifting appliance (9) is separated from the blade (7);After the second lifting appliance (3) drives the blade (7) to move downward to a predetermined position by the trolley assembly (5), the second lifting appliance (3) is separated from the blade (7); S3, the end of the second lifting appliance (3) is connected with the next blade (7), and the second lifting appliance (3) drives the blade (7) to move in the direction of the hub (8) by the trolley assembly (5); S4, when the blade (7) is separated from the hub (8) by a predetermined distance, the end of the first lifting appliance (9) is connected with the blade (7), and the end of the second lifting appliance (3) is separated from the blade (7). S5, when the blade (7) and the hub (8) are in contact, the blade (7) and the hub (8) are fixedly connected through bolts, and the first lifting tool (9) is separated from the end part of the blade (7).

8. The replacement method of the wind power operation and maintenance blade vertical replacement device according to claim 7, characterized in that, During replacement, a ground crane is used to assist in tailing of the blade (7).

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