Method for lifting ultra-long wind turbine blade

Abstract

The present invention provides a method for lifting an ultra-long wind turbine blade, comprising the following steps: mounting an ultra-long single blade special blade clamp on an auxiliary hook of a main crane; winding special wind nylon ropes around bolts at the root of an ultra-long single blade and a designated position near the blade tip side of the ultra-long single blade, respectively; connecting steel wire ropes wound in an electric traction winch to the special wind nylon ropes on two positions of the ultra-long single blade; turning on the main crane to start lifting the ultra-long single blade, controlling the main crane to rotate, and controlling a hook of the main crane, to move the ultra-long single blade to a same height as a hub; controlling the two steel wire ropes on the electric traction winch to fine-tune the front, back, left and right offset angles of the ultra-long single blade, until all of the bolts are inserted into corresponding holes in the hub, to complete the mounting of the ultra-long single blade. The present invention produces the effects of improving the safety and mounting efficiency of a high-altitude mounting operation of an offshore wind turbine set and reducing the costs of offshore wind power construction.

Description

A method for hoisting super-long fan blades Technical Field

[0001] The present invention relates to the technical field of fan blade hoisting, and in particular to a method for hoisting an extra-long fan blade. Background Art

[0002] At present, offshore wind power development is gradually expanding from offshore shallow waters to deep seas. At the same time, in order to reduce the cost of offshore wind power development and improve power generation efficiency, the capacity of offshore wind turbines is getting larger and larger. The world's first 16MW ultra-large capacity offshore wind turbine has been successfully connected to the grid for power generation in China.

[0003] Marine weather conditions are ever-changing, and the installation of ultra-large capacity wind turbine components at sea is easily affected by factors such as wind, waves, and surges. This makes hoisting and construction difficult, especially for ultra-long blades of 123 meters and above. On the one hand, the blades are over 120 meters long but lightweight, and when hoisted to heights of over 150 meters, they swing with the wind and are prone to colliding with the crane boom, causing safety accidents such as crane collisions. On the other hand, the blade-hub docking process requires high precision, requiring more than 100 bolts to be neatly inserted into the corresponding bolt holes. Existing blade hoisting solutions make it difficult to adjust the blade docking angle. Although the blade fixture has a fine-tuning function, its pulling force is limited, and the rotation angle adjustment range is too small. The vibration of the blades at high altitude also affects docking efficiency, resulting in a long docking time and affecting installation efficiency during the construction window. Summary of the Invention

[0004] In response to the deficiencies in the prior art, the present invention provides a method for hoisting ultra-long wind turbine blades, which solves the problems in the prior art of excessive instantaneous wind force causing blades to swing at high altitude and blades to shake at high altitude affecting installation efficiency.

[0005] According to an embodiment of the present invention, a method for hoisting an ultra-long wind turbine blade includes the following steps:

[0006] S1. Use the main crane and auxiliary crane to lift the extra-long single blade onto the main deck. After installing and inspecting the root connection bolts of the extra-long single blade, install the special blade clamp for the extra-long single blade on the auxiliary hook of the main crane and install the blade clamp in the designated position of the extra-long single blade.

[0007] S2. Use a special wind-catching nylon rope to wrap around the bolts at the root of the extra-long single blade and the designated position near the blade tip;

[0008] S3. Install an electric traction winch at the main hook of the main crane. Use the steel wire rope wound inside the electric traction winch to connect the two special wind-catching nylon ropes on the extra-long single blade. Use a special shackle assembly to connect the connection points.

[0009] S4. Start the main crane to start lifting the extra-long single blade. When the extra-long single blade is lifted vertically to the specified height, start the electric traction winch to reel in the wire rope, adjust the position of the extra-long single blade, and tighten the wire rope.

[0010] S5. Control the main crane to slowly rotate. Stop rotating when the root of the extra-long single blade rotates to a position 2-3m away from the wind turbine hub. Observe the high-altitude deflection of the extra-long single blade. If the instantaneous wind force is too strong, adjust the tension of the traction wire rope and start rotating the main crane again.

[0011] S6. Based on the relative height of the extra-long single blade and the hub, control the main crane hook to move the extra-long single blade to the same level as the hub, and continue to rotate it into place;

[0012] S7. When the root bolt of the extra-long single blade is 0.5m away from the bolt hole, observe the hole and control the two steel wire ropes on the electric traction winch to fine-tune the front, back, left and right offset angles of the extra-long single blade. Slowly align the holes until all the bolts are inserted into the corresponding holes in the hub to complete the installation of the extra-long single blade.

[0013] Preferably, the electric traction winch is wound with a first traction steel wire rope and a second traction steel wire rope, and the first traction steel wire rope and the second traction steel wire rope are respectively wound on the two winding shafts of the electric traction winch, the wind-catching nylon rope arranged at the root of the extra-long single blade is the blade root wind-catching nylon rope, and the wind-catching nylon rope arranged on the tip side of the extra-long single blade is the blade side wind-catching nylon rope, the first traction steel wire rope is connected to the blade side wind-catching nylon rope, and the second traction steel wire rope is connected to the blade root wind-catching nylon rope.

[0014] Preferably, a boom guide pulley is rotatably installed in the middle of the boom of the main crane, a triangular bracket is vertically installed on the top of the main crane, the middle of the triangular bracket is connected to the boom, and top angle guide pulleys are rotatably installed at both ends of the triangular bracket. The first traction wire rope and the second traction wire rope are both guided by the boom guide pulley and respectively guided by the two top angle guide pulleys at both ends of the triangular bracket.

[0015] Preferably, the method for fine-tuning the front, back, left, and right directions of the extra-long single blade in step S7 includes:

[0016] S701, by simultaneously winding the first traction wire rope and the second traction wire rope, pulling both ends of the extra-long single blade toward the main crane to achieve unidirectional translation adjustment;

[0017] S702: Reeling in the first traction wire rope and unreeling the second traction wire rope to pull the blade root of the extra-long single blade away from the main crane, and adjusting the blade root angle of the extra-long single blade during the movement;

[0018] S703: Unwinding the first traction wire rope and rewinding the second traction wire rope to pull the blade root of the extra-long single blade toward the main crane, and adjusting the blade root angle of the extra-long single blade during the movement.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By setting up a mechanical traction wind-catching nylon rope group to replace the blade clamp clamping and the traditional deck surface manual wind-catching method, the industry problem of unsafe high-altitude docking of ultra-long single blades is effectively solved, ensuring the safe and reliable offshore construction of ultra-long blades. Compared with the traditional ultra-long single blade docking solution, it can greatly shorten the high-altitude docking time and improve the efficiency of offshore ultra-large capacity wind turbine blade installation.

[0021] 2. By setting up a traction nylon rope to connect the extra-long single blade, the auxiliary hook of the main crane can be used to tighten the extra-long single blade during the installation process to prevent the extra-long single blade from shaking in the air.

[0022] 3. Use two traction steel wire ropes to connect the wind-catching nylon ropes at both ends of the extra-long single blade. By adjusting the reeling and unreeling of the two traction steel wire ropes, the rotation of the end of the extra-long single blade is adjusted to improve the efficiency of the connection between the root bolts of the extra-long single blade and the through-hole of the fan hub, thereby improving the installation efficiency of the extra-long single blade.

[0023] 4. On the one hand, the blade clamp device relies on its own fine-tuning control system to adjust the blade's up and down amplitude. On the other hand, through the two sets of traction winch systems on the left and right, the strong ability of large span angle and large traction force is used to ensure that the blade is stationary in the air or to achieve angle adjustment in the four directions of front, back, left and right, so as to achieve the purpose of rapid alignment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a diagram showing a lifting scheme for an extra-long single blade in an embodiment of the present invention.

[0025] FIG2 is a top view of the hoisting of an extra-long single blade in an embodiment of the present invention.

[0026] In the above drawings: 1. Extra-long single blade; 2. Blade clamp; 3. Blade side wind-catching nylon rope; 4. Blade root wind-catching nylon rope; 5. First traction wire rope; 6. Second traction wire rope; 7. Top angle guide pulley; 8. Boom guide pulley; 9. Electric traction winch; 10. Hub; 11. Triangle bracket. Implementation Method

[0027] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0028] As shown in Figures 1 and 2, the present invention proposes a method for hoisting ultra-long wind turbine blades, comprising the following steps:

[0029] S1. Use the main crane and auxiliary crane to lift the extra-long single blade 1 onto the main deck. After installing and checking the root connection bolts of the extra-long single blade 1, install the special blade clamp 2 for the extra-long single blade 1 on the auxiliary hook of the main crane and install the blade clamp 2 at the designated position of the extra-long single blade 1.

[0030] S2. Use a special wind-catching nylon rope to wrap around the bolts at the root of the extra-long single blade 1 and the designated position near the blade tip;

[0031] S3. Install an electric traction winch 9 at the main hook of the main crane. Use the steel wire rope wound inside the electric traction winch 9 to connect the two special wind-catching nylon ropes on the extra-long single blade 1 respectively. Use a special shackle assembly to connect the connection points.

[0032] S4. Start the main crane to start lifting the extra-long single blade 1. When the extra-long single blade 1 is vertically lifted to a specified height, start the electric traction winch 9 to reel in the wire rope, adjust the position of the extra-long single blade 1, and tighten the wire rope.

[0033] S5. Control the main crane to slowly rotate. Stop rotating when the root of the extra-long single blade 1 rotates to a position 102-3 meters away from the wind turbine hub. Observe the high-altitude deflection of the extra-long single blade 1. If the instantaneous wind force is too strong, adjust the tension of the traction wire rope and start rotating the main crane again.

[0034] S6. Control the main crane hook to move the super-long single blade 1 to the same level as the hub 10 based on the relative height between the super-long single blade 1 and the hub 10, and continue to rotate it into place;

[0035] S7. When the root bolt of the extra-long single blade 1 is 0.5m away from the bolt hole, observe the hole and control the two steel wire ropes on the electric traction winch 9 to fine-tune the front, back, left and right offset angles of the extra-long single blade 1. Slowly align the holes until all the bolts are inserted into the corresponding holes of the hub 10 to complete the installation of the extra-long single blade 1.

[0036] A triangular bracket 11 is installed on the main lifting boom of the offshore wind turbine installation platform. The triangular bracket 11 is an isosceles triangle structure. The middle part of the triangular bracket 11 is fixed on the boom. Vertex guide pulleys 7 are installed on the two vertices on the outside of the triangular bracket 11. Corresponding guide pulleys are installed at appropriate positions in the middle and lower part of the boom. Two sets of 20-ton winches, namely electric traction winches 9, are installed on the slewing chassis of the main crane. Two sets of steel ropes are wound around the two sets of winches, namely the first traction steel wire rope 5 and the second traction steel wire rope 6. The first traction steel wire rope 5 and the second traction steel wire rope 6 are respectively connected to the wind-catching nylon rope on the tip side of the extra-long single blade 1 and the blade root.

[0037] The blade root and blade tip side wind ropes are connected by two sets of traction wire ropes, and the auxiliary hook of the main crane is used to fix the extra-long single blade 1. Even under conditions where the instantaneous wind speed is greater than 10m / s, the extra-long blade staying in the air can still remain relatively still.

[0038] As shown in Figures 1 and 2, the electric traction winch 9 is wound with a first traction steel wire rope 5 and a second traction steel wire rope 6, which are respectively wound on two reel-up shafts of the electric traction winch 9. The wind-catching nylon rope arranged at the root of the extra-long single blade 1 is the blade root wind-catching nylon rope 4, and the wind-catching nylon rope arranged on the tip side of the extra-long single blade 1 is the blade side wind-catching nylon rope 3. The first traction steel wire rope 5 is connected to the blade side wind-catching nylon rope 3, and the second traction steel wire rope 6 is connected to the blade root wind-catching nylon rope 4.

[0039] As shown in Figure 2, a boom guide pulley 8 is rotatably mounted in the middle of the boom of the main crane, a tripod 11 is vertically mounted on the top of the main crane, the middle of the tripod 11 is connected to the boom, and top angle guide pulleys 7 are rotatably mounted at both ends of the tripod 11. The first traction wire rope 5 and the second traction wire rope 6 are both guided through the boom guide pulley 8 and respectively through the two top angle guide pulleys 7 at both ends of the tripod 11.

[0040] As shown in Figures 1 and 2, the method for fine-tuning the front, back, left, and right of the super-long single blade 1 in step S7 includes:

[0041] S701, by simultaneously winding the first traction wire rope 5 and the second traction wire rope 6, pulling both ends of the extra-long single blade 1 toward the main crane at the same time, to achieve unidirectional translation adjustment;

[0042] S702: Reeling in the first traction wire rope 5 and unreeling the second traction wire rope 6 to pull the blade root of the extra-long single blade 1 away from the main crane, and adjusting the blade root angle of the extra-long single blade 1 during the movement;

[0043] S703: Unwind the first traction wire rope 5 and rewind the second traction wire rope 6 to pull the blade root of the extra-long single blade 1 toward the main crane, and adjust the blade root angle of the extra-long single blade 1 during the movement.

Claims

1. A method for hoisting an extra-long wind turbine blade, characterized in that: The steps include: S1. Use the main crane and the auxiliary crane to hoist the extra-long single blade (1) onto the main deck. After installing and checking the connecting bolts at the root of the extra-long single blade, install the blade clamp (2) dedicated to the extra-long single blade (1) on the auxiliary hook of the main crane, and install the blade clamp (2) at the designated position of the extra-long single blade (1); S2. Use a special wind-catching nylon rope to wrap around the bolts at the root of the extra-long single blade (1) and at the designated position near the blade tip; S3. Install an electric traction winch (9) at the main hook of the main crane, use the steel wire rope wound inside the electric traction winch (9) to connect the two special wind-catching nylon ropes on the extra-long single blade (1) respectively, and use a special shackle assembly to connect the connection points; S4, starting the main crane to start lifting the extra-long single blade (1), when the extra-long single blade (1) is vertically lifted to a specified height, starting the electric traction winch (9) to reel in the steel wire rope, adjusting the orientation of the extra-long single blade (1), and tightening the steel wire rope; S5, controlling the main crane to slowly rotate, and stopping the rotation when the blade root of the extra-long single blade (1) rotates to a position 2-3 m away from the wind turbine hub (10), observing the high-altitude deflection of the extra-long single blade (1), and adjusting the tightness of the traction wire rope when the instantaneous wind force is too strong, and starting the main crane to rotate again; S6. According to the relative height between the extra-long single blade (1) and the wheel hub (10), control the main crane hook so that the extra-long single blade (1) moves to the same level as the wheel hub (10), and continues to rotate it into place; S7. When the root bolt of the extra-long single blade (1) is 0.5 m away from the bolt hole, the hole is observed and the two steel wire ropes on the electric traction winch (9) are respectively controlled to fine-tune the front, back, left, and right offset angles of the extra-long single blade (1). The hole is slowly aligned until all the bolts are inserted into the corresponding holes of the wheel hub (10), thereby completing the installation of the extra-long single blade (1).

2. A method for hoisting an extra-long wind turbine blade according to claim 1, characterized in that: The electric traction winch (9) is wound with a first traction steel wire rope (5) and a second traction steel wire rope (6), the first traction steel wire rope (5) and the second traction steel wire rope (6) are respectively wound on two winding shafts of the electric traction winch (9), the wind-catching nylon rope arranged at the root of the extra-long single blade (1) is a blade root wind-catching nylon rope (4), the wind-catching nylon rope arranged on the blade tip side of the extra-long single blade (1) is a blade side wind-catching nylon rope (3), the first traction steel wire rope (5) is connected to the blade side wind-catching nylon rope (3), and the second traction steel wire rope (6) is connected to the blade root wind-catching nylon rope (4).

3. A method for hoisting an extra-long wind turbine blade according to claim 2, characterized in that: A boom guide pulley (8) is rotatably mounted in the middle of the boom of the main crane, a triangular bracket (11) is vertically mounted on the top of the main crane, the middle of the triangular bracket (11) is connected to the boom, and top angle guide pulleys (7) are rotatably mounted at both ends of the triangular bracket (11), and the first traction steel wire rope (5) and the second traction steel wire rope (6) are both guided by the boom guide pulley (8) and are respectively guided by two top angle guide pulleys (7) at both ends of the triangular bracket (11).

4. A method for hoisting an extra-long wind turbine blade according to claim 3, characterized in that: The method for fine-tuning the front, back, left, and right sides of the super-long single blade (1) in step S7 comprises: S701, by simultaneously winding up the first traction steel wire rope (5) and the second traction steel wire rope (6), pulling both ends of the extra-long single blade (1) to move toward the main crane at the same time, thereby achieving unidirectional translation adjustment; S702, by winding up the first traction steel wire rope (5) and unwinding the second traction steel wire rope (6), the blade root of the extra-long single blade (1) is pulled away from the main crane, and the blade root angle of the extra-long single blade (1) is adjusted during the movement; S703, by unwinding the first traction wire rope (5) and rewinding the second traction wire rope (6), the blade root of the extra-long single blade (1) is pulled close to the main crane and the blade root angle of the extra-long single blade (1) is adjusted during the movement.

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