A hoisting method for installing the blades of a power generation wind turbine

Abstract

The present invention discloses a hoisting method for installing a blade of a power generation fan in the field of power generation fan installation. This method horizontally hoists the blade through a self-correcting hoisting frame, relies on an attitude sensor to real-time monitor the attitude of the blade in the air, and then uses a self-correcting module to control the direction of the high-pressure gas ejected by the attitude-correcting injector. By making the attitude-correcting injector eject gas along the moving wind direction of the C-shaped frame to resist the movement of the C-shaped frame, the sway of the blade during the hoisting process in the air can be effectively weakened, the risk of overturning can be avoided, and the efficiency of the rapid docking of the blade with the hub can also be effectively improved. It has a high degree of intelligence and automation, can effectively improve the hoisting efficiency, and also adaptively clamps the blade through an upper clamping pad and a lower clamping seat, effectively avoiding damage to the blade and the dropping of the blade during the hoisting process, realizing the safety and high efficiency of single-blade horizontal hoisting, and having better economy and applicability.

Description

Technical Field

[0001] The present invention relates to the field of installation of power generation wind turbines, and particularly to a hoisting method for installing blades of a power generation wind turbine. Background Art

[0002] Wind turbine blades are the core components in wind turbines that convert natural wind energy in nature into electrical energy of wind turbine generator sets, and are also the main basis for measuring the design and technical level of wind turbine generator sets.

[0003] At present, there are mainly two hoisting methods for wind turbine blades. One is to hoist the blade and the hub together after combining them on the ground, and the other is to hoist the hub first and then hoist a single blade. The first hoisting method has high requirements for the terrain, and the overall hoisting is more dangerous. Although the second hoisting method has better adaptability, during the process of horizontal hoisting of a single blade, due to the hoisting reason and the large influence of the wind force on the blade in the air, the blade is prone to shaking, which not only easily causes the risk of overturning of the hoisting equipment, but also is not convenient for the connection between the blade and the hub.

[0004] Therefore, we solve the problem that the existing single blade horizontal hoisting process is easily affected by the wind through this technical solution. Summary of the Invention

[0005] The purpose of the present invention is to improve the blade hoisting method in the prior art. Compared with the prior art, a hoisting method for installing blades of a power generation wind turbine is provided. The blade is horizontally hoisted by a self-correcting hoisting frame, and the attitude sensor is relied on to monitor the attitude of the blade in the air in real time. Then, the self-correcting module is used to control the direction of the high-pressure gas ejected by the attitude correction injector. By making the attitude correction injector eject gas along the moving wind direction of the C-shaped frame to resist the movement of the C-shaped frame, the shaking of the blade during the hoisting process in the air can be effectively weakened, the risk of overturning can be avoided, and the efficiency of quickly docking the blade with the hub can also be effectively improved. The degree of intelligence and automation is high, the hoisting efficiency can be effectively improved, and the blade is adaptively clamped by the upper clamping pad and the lower clamping seat, effectively avoiding damage to the blade and the blade falling during the hoisting process.

[0006] The safety and high efficiency of single blade horizontal hoisting are realized, and it has better economy and applicability.

[0007] As a further improvement of the present application, a spherical hinge is also connected between the electric telescopic rod and the upper clamping pad, and the ball seat of the spherical hinge is fixedly embedded in the upper clamping pad. Since the surface of the blade is uneven, in order to make the upper clamping pad adaptively contact the surface of the blade to increase the friction force to prevent the blade from falling, the electric telescopic rod and the upper clamping pad are connected by a spherical hinge, so as to realize the self-adaptive adjustment of the inclination angle of the upper clamping pad.

[0008] As a further improvement of the present application, the upper clamping pad includes a connecting seat. A hollow pad one is fixedly connected to the lower end of the connecting seat, and an elastic net is filled inside the hollow pad one. The hollow pad one and the elastic net rely on their own elasticity to ensure close contact between the upper clamping pad and the surface of the blade, thereby ensuring sufficient frictional force between the upper clamping pad and the blade. The elastic net enables the upper clamping pad to adaptively make full contact with the blade.

[0009] As a further improvement of the present application, the lower clamping seat includes a bearing seat. A hollow pad two is fixedly connected to the upper end of the bearing seat, and an elastic filling layer is filled inside the hollow pad two. The elastic filling layer provides a flexible support surface for the blade to prevent damage to the blade due to the clamping force. The function of the hollow pad two is the same as that of the hollow pad one, both of which are to increase the frictional resistance with the blade.

[0010] As a further improvement of the present application, a plurality of buffer rods evenly distributed at equal intervals are fixedly connected to the inner wall of the upper end of the hollow pad two. A buffer cavity is provided in the inner wall of the upper end of the bearing seat, and a buffer pad connected to the bottoms of the plurality of buffer rods at the same time is placed at the bottom of the buffer cavity. The buffer pad and the buffer rods additionally provide a part of buffer force for the blade, thereby further effectively preventing damage to the blade under the clamping force.

[0011] As a supplement to the further improvement of the present application, the area of the hollow pad two is larger than that of the hollow pad one, and both the hollow pad two and the hollow pad one are made of high-damping elastic materials. The hollow pad two provides a support platform for the blade. In order to disperse the pressure of the blade, the area of the hollow pad two should be larger than that of the hollow pad one.

[0012] Compared with the prior art, the advantages of the present invention are as follows:

[0013] (1) In this solution, a self-correcting hoisting frame is used to horizontally hoist the blade. The attitude sensor is relied on to monitor the attitude of the blade in the air in real time, and then the self-correcting module is used to control the direction of the high-pressure gas ejected by the attitude-correcting injector. By making the attitude-correcting injector eject gas along the moving wind direction of the C-shaped frame to resist the movement of the C-shaped frame, the shaking of the blade during the hoisting process in the air can be effectively reduced, the risk of overturning can be avoided, and the efficiency of the quick docking of the blade and the hub can also be effectively improved. The degree of intelligence and automation is high, the hoisting efficiency can be effectively improved, and the blade is clamped adaptively through the upper clamping pad and the lower clamping seat, effectively avoiding damage to the blade and the dropping of the blade during the hoisting process, realizing the safety and high efficiency of the single-blade horizontal hoisting, and having better economy and applicability.

[0014] (2) A spherical hinge is also connected between the electric telescopic rod and the upper clamping pad, and the ball seat of the spherical hinge is fixedly embedded in the upper clamping pad. Since the surface of the blade is uneven, in order to enable the upper clamping pad to adaptively contact the blade surface to increase the friction force and prevent the blade from falling, the electric telescopic rod and the upper clamping pad are connected by the spherical hinge, so as to realize the adaptive adjustment of the inclination angle of the upper clamping pad.

[0015] (3) The upper clamping pad includes a connecting seat, and a hollow pad one is fixedly connected to the lower end of the connecting seat. A elastic net is filled inside the hollow pad one. The hollow pad one and the elastic net rely on their own elasticity to ensure that the upper clamping pad is in close contact with the surface of the blade, so as to ensure that there is enough friction force between the upper clamping pad and the blade, and the elastic net enables the upper clamping pad to adaptively contact the blade fully.

[0016] (4) The lower clamping seat includes a bearing seat, and a hollow pad two is fixedly connected to the upper end of the bearing seat. An elastic filling layer is filled inside the hollow pad two. The elastic filling layer provides a flexible support surface for the blade to prevent the blade from being damaged under the clamping force. The function of the hollow pad two is the same as that of the hollow pad one, both of which are to increase the frictional resistance with the blade.

[0017] (5) A plurality of buffer rods evenly distributed at equal intervals are also fixedly connected to the inner wall of the upper end of the hollow pad two. A buffer cavity is provided on the inner wall of the upper end of the bearing seat, and a buffer pad connected to the bottom of the plurality of buffer rods at the same time is placed at the bottom of the buffer cavity. The buffer pad and the buffer rods additionally provide a part of buffer force for the blade, so as to further effectively prevent the blade from being damaged under the clamping force.

[0018] (6) The area of the hollow pad two is larger than that of the hollow pad one, and both the hollow pad two and the hollow pad one are made of high-damping elastic materials. The hollow pad two provides a support platform for the blade. In order to disperse the pressure of the blade, the area of the hollow pad two should be larger than that of the hollow pad one. Description of the Drawings

[0019] Figure 1 It is a lifting schematic diagram of the present invention;

[0020] Figure 2 It is a three-dimensional view of the back of the self-correcting lifting frame of the present invention;

[0021] Figure 3 It is a three-dimensional view of the front of the self-correcting lifting frame of the present invention;

[0022] Figure 4 It is a position relationship diagram of the upper clamping pad and the lower clamping seat of the present invention;

[0023] Figure 5 It is a posture correction injector diagram of the present invention;

[0024] Figure 6Cross-sectional view of the attitude correction injector of the present invention;

[0025] Figure 7 Cross-sectional view of the upper clamping pad of the present invention;

[0026] Figure 8 Cross-sectional view of the lower clamping seat of the present invention.

[0027] Description of the reference numerals in the figure:

[0028] 1 C-shaped frame, 2 control box, 3 electric telescopic rod, 301 spherical hinge, 4 upper clamping pad, 401 connecting seat, 402 hollow pad one, 403 elastic net, 5 lower clamping seat, 501 bearing seat, 502 hollow pad two, 503 elastic filling layer, 504 buffer rod, 505 buffer cavity, 506 buffer pad, 6 attitude sensor, 7 attitude correction injector, 701 protective box, 702 injection pipe, 703 rotating bearing, 704 gas supply pipe, 705 rotary seal, 706 driven gear, 707 servo motor, 708 driving gear, 8 gas cylinder box, 9 high-pressure gas cylinder, 10 bottle blocking plate. Detailed implementation manners

[0029] In the embodiments, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings of the specification. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1:

[0031] A hoisting method for installing the blades of a power generation wind turbine. Please refer to Figure 1 , including the following hoisting steps:

[0032] S1. First, install the tower barrel and the nacelle according to the normal installation procedure. Then, install the hub first. After the hub is installed, install the blades one by one by using the single-blade hoisting method;

[0033] S2. Before hoisting the blade, place the transported blade on the rack first. Then, use the crane to clamp the self-correcting hoisting frame to the blade to make the blade in a horizontal state. Then, start the crane to hoist the blade for installation;

[0034] S3. During the hoisting process, the self-correcting hoisting frame automatically corrects according to its own attitude to prevent the blade from shaking violently during hoisting, which affects the safety of the crane. At the same time, it also helps the installation position of the blade to be directly opposite to the installation hole of the hub, thus helping the workers to complete the installation quickly;

[0035] Please refer to Figure 2 , 4, the self-correcting lifting frame in step S2 includes an attitude monitoring module and a self-correcting module. The self-correcting lifting frame further includes a C-shaped frame 1, and a control box 2 is installed on the back crossbeam of the C-shaped frame 1. Electric telescopic rods 3 electrically connected to the control box 2 are installed on the upper arms at both ends of the C-shaped frame 1, and a upper clamping pad 4 is connected to the lower output end of the electric telescopic rod 3. A spherical hinge 301 is also connected between the electric telescopic rod 3 and the upper clamping pad 4, and the ball seat of the spherical hinge 301 is fixedly embedded in the upper clamping pad 4. Since the surface of the blade is uneven, in order to make the upper clamping pad 4 adaptively contact the blade surface to increase the friction force to prevent the blade from falling, the electric telescopic rod 3 and the upper clamping pad 4 are connected by the spherical hinge 301, so as to realize the adaptive adjustment of the inclination angle of the upper clamping pad 4;

[0036] Please refer to Figure 7 , the upper clamping pad 4 includes a connecting seat 401. A hollow pad 402 is fixedly connected to the lower end of the connecting seat 401, and an elastic net 403 is filled inside the hollow pad 402. The hollow pad 402 and the elastic net 403 rely on their own elasticity to ensure that the upper clamping pad 4 is in close contact with the blade surface, so as to ensure that there is enough friction force between the upper clamping pad 4 and the blade, and the elastic net 403 enables the upper clamping pad 4 to adaptively contact the blade fully;

[0037] Please refer to Figure 2 、 3 , lower clamping seats 5 are fixedly connected to the lower arms at both ends of the C-shaped frame 1, and the lower clamping seats 5 are located directly below the upper clamping pads 4. An attitude sensor 6 electrically connected to the attitude monitoring module is installed on the front crossbeam of the C-shaped frame 1. Attitude correction ejectors 7 are installed at four corners on each side of the C-shaped frame 1, and the self-correcting module is electrically connected to the attitude correction ejectors 7 through a control processor (the specific connection structure and working principle are well-known technologies in the relevant field and will not be described in detail here). Gas cylinder boxes 8 are fixedly connected to both sides of the C-shaped frame 1 where the control box 2 is located, and a plurality of high-pressure gas cylinders 9 communicated with the attitude correction ejectors 7 are placed in the gas cylinder boxes 8. A bottle blocking plate 10 matching the high-pressure gas cylinders 9 is clamped on the gas cylinder boxes 8;

[0038] Please refer to Figure 5 、 6, the attitude correction injector 7 includes a protective box 701. At the upper end of the protective box 701, an injection pipe 702 is installed. And at the nozzle of the injection pipe 702, a solenoid valve electrically connected to the self-correction module is installed (the specific installation structure and working principle are well-known technologies for those skilled in the relevant field, and the specific model is selected according to actual needs and will not be described in detail here). At the upper inner wall of the protective box 701, a rotating bearing 703 is installed. And the injection pipe 702 passes through the rotating bearing 703 and is connected to it. At the lower end of the protective box 701, an air supply pipe 704 is fixedly embedded. And the lower end of the air supply pipe 704 penetrates the protective box 701. The air supply pipe 704 is connected to the high-pressure gas cylinder 9 through the air supply pipe. At the upper end of the air supply pipe 704, a rotary seal 705 is connected. And the rotary seal 705 is connected to the injection pipe 702. At the lower side wall of the injection pipe 702, a driven gear 706 is fixedly connected. At the bottom of one side of the protective box 701, a servo motor 707 electrically connected to the self-correction module is installed (the specific model is selected according to actual needs and will not be described in detail here). And at the upper output end of the servo motor 707, a driving gear 708 meshing with the driven gear 706 is connected.

[0039] Embodiment 2:

[0040] On the basis of Embodiment 1, please refer to Figure 8 , the lower clamping seat 5 includes a bearing seat 501. At the upper end of the bearing seat 501, a hollow pad two 502 is fixedly connected. And inside the hollow pad two 502, an elastic filling layer 503 is filled (preferably made of rubber material, and other materials can also be selected according to actual needs). The elastic filling layer 503 provides a flexible support surface for the blade, so as to prevent the blade from being damaged under the clamping force. The function of the hollow pad two 502 is the same as that of the hollow pad one 402, which is to increase the frictional resistance with the blade. On the upper inner wall of the hollow pad two 502, a plurality of buffer rods 504 evenly distributed at equal intervals are also fixedly connected. At the upper inner wall of the bearing seat 501, a buffer cavity 505 is opened. And at the bottom of the buffer cavity 505, a buffer pad 506 connected to the bottoms of a plurality of buffer rods 504 at the same time is placed. The buffer pad 506 and the buffer rods 504 additionally provide a part of buffer force for the blade, thereby further effectively preventing the blade from being damaged under the clamping force. The area of the hollow pad two 502 is larger than that of the hollow pad one 402. And both the hollow pad two 502 and the hollow pad one 402 are made of high-damping elastic material (preferably polyurethane elastic material, and other materials can also be selected according to actual needs). The hollow pad two 502 provides a support platform for the blade. In order to disperse the pressure of the blade, the area of the hollow pad two 502 should be larger than that of the hollow pad one 402.

[0041] The working principle of the self-correcting lifting frame in this solution is as follows: Before the lifting starts, connect the C-shaped frame 1 to the lifting equipment first, and then use the lifting equipment to drive the C-shaped frame 1 to clamp the blade placed on the rack. When clamping, align the front face of the C-shaped frame 1 with the blade, so that the upper clamping pad 4 and the lower clamping seat 5 are respectively located above and below the blade. Then operate the control box 2 to start the electric telescopic rod 3 to press down the upper clamping pad 4 to clamp the blade. The cooperation between the upper clamping pad 4 and the lower clamping seat 5 can effectively prevent the blade from being damaged under the clamping force, and can also provide sufficient friction to prevent the blade from slipping. After the lifting, the attitude sensor 6 monitors the aerial attitude of the C-shaped frame 1 in real time, and transmits the monitored data to the attitude monitoring module. After analyzing and processing the data, the attitude monitoring module sends a signal to the self-correcting module. The self-correcting module adjusts the direction and time of the gas sprayed by the spray pipe 702 by controlling the start and stop of the servo motor 707 and the solenoid valve in the spray pipe 702. In the self-correcting state, the servo motor 707 drives the driving gear 708 to rotate, and the driving gear 708 then meshes with the driven gear 706 to drive the spray pipe 702 to rotate, so as to achieve the purpose of adjusting the spraying direction of the spray pipe 702. The opening and closing of the solenoid valve can control the time of the sprayed gas. In this way, when the C-shaped frame 1 shakes, multiple spray pipes 702 adjust the steering simultaneously and spray gas along the moving direction of the C-shaped frame 1, and use the reaction force to weaken the shaking of the C-shaped frame 1, effectively improving the stability of the blade during the lifting process.

[0042] The above is only the best implementation mode adopted by the present invention in combination with the current actual needs, but the protection scope of the present invention is not limited thereto.

Claims

1. A method for hoisting and installing blades of a power generation wind turbine, characterized in that: The lifting steps include the following: S1, first install the tower and nacelle according to the normal installation procedure, then install the hub first, and then install the blades one by one using the single blade hoisting method after the hub is installed; S2, before hoisting the blades, place the transported blades on the rack, then use the crane to clamp the blades with the self-correcting hoisting rack to make the blades horizontal, and then start the crane to hoist the blades for installation; S3, during the lifting process, the self-correcting lifting frame automatically corrects itself according to its own posture to prevent the blade from shaking violently during the lifting process and affecting the safety of the crane. It also helps the blade installation position to face the installation hole of the hub, thus helping workers to complete the installation quickly; The self-correcting lifting frame in step S2 comprises a posture monitoring module and a self-correcting module. The self-correcting lifting frame also comprises a C-shaped frame (1), and a control box (2) is installed on the back crossbeam of the C-shaped frame (1). The upper arms at both ends of the C-shaped frame (1) are both equipped with electric telescopic rods (3) electrically connected to the control box (2), and the lower output end of the electric telescopic rod (3) is connected to an upper clamping pad (4), and the upper clamping pad (4) comprises a connecting seat (401), and the lower end of the connecting seat (401) is fixedly connected to a hollow pad 1 (402), and the interior of the hollow pad 1 (402) is filled with an elastic net (403). The lower arms at both ends of the C-shaped frame (1) are both fixedly connected to lower clamping seats (5), and the lower clamping seats (5) are located directly below the upper clamping pad (4). (5) comprises a bearing seat (501), the upper end of the bearing seat (501) is fixedly connected to a hollow cushion 2 (502), and the interior of the hollow cushion 2 (502) is filled with an elastic filling layer (503), a posture sensor (6) electrically connected to a posture monitoring module is installed on the front crossbeam of the C-shaped frame (1), four corners on both sides of the C-shaped frame (1) are installed with a posture correction injector (7), and the self-correction module is electrically connected to the posture correction injector (7) through a control processor, the C-shaped frame (1) is located on both sides of the control box (2) and is fixedly connected to a gas cylinder box (8), and a plurality of high-pressure gas cylinders (9) connected to the posture correction injectors (7) are placed in the gas cylinder box (8), and a bottle baffle (10) matching the high-pressure gas cylinder (9) is clamped on the gas cylinder box (8); The posture correction injector (7) comprises a protection box (701), an injection pipe (702) is installed at the upper end of the protection box (701), and a solenoid valve electrically connected to the self-correction module is installed at the nozzle of the injection pipe (702), a rotating bearing (703) is installed on the inner wall of the upper end of the protection box (701), and the injection pipe (702) passes through the rotating bearing (703) and is connected thereto, an air supply pipe (704) is fixedly embedded at the lower end of the protection box (701), and the lower end of the air supply pipe (704) passes through the protection box (701), and the The air supply pipe (704) is connected to the high-pressure gas storage bottle (9) via the air supply pipe, the upper end of the air supply pipe (704) is connected to a rotating seal (705), and the rotating seal (705) is connected to the injection pipe (702), the lower end side wall of the injection pipe (702) is fixedly connected to a driven gear (706), and a servo motor (707) electrically connected to the self-correcting module is installed at the bottom of one side of the protection box (701), and the upper output end of the servo motor (707) is connected to a driving gear (708) meshing with the driven gear (706).

2. A method for hoisting and installing blades of a power generating wind turbine according to claim 1, characterized in that: A spherical hinge (301) is also connected between the electric telescopic rod (3) and the upper clamping pad (4), and a ball seat of the spherical hinge (301) is fixedly embedded in the upper clamping pad (4).

3. A method for hoisting and installing a blade of a power generating wind turbine according to claim 1, characterized in that: The inner wall at the upper end of the hollow cushion 2 (502) is also fixedly connected to a plurality of buffer rods (504) evenly distributed at equal intervals, the inner wall at the upper end of the bearing seat (501) is provided with a buffer cavity (505), and a buffer cushion (506) connected to the bottoms of the plurality of buffer rods (504) is placed at the bottom of the buffer cavity (505).

4. A method for hoisting and installing blades of a power generating wind turbine according to claim 1, characterized in that: The area of ​​the hollow pad 2 (502) is greater than the area of ​​the hollow pad 1 (402), and both the hollow pad 2 (502) and the hollow pad 1 (402) are made of high-damping elastic material.

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