CN117755950A - A method for hoisting ultra-long fan blades - Google Patents

Abstract

The invention provides a hoisting method of a blade of an ultra-long fan, which comprises the following steps: mounting a blade clamp special for an ultra-long single blade on a secondary hook of a main crane; the special wind-collecting nylon ropes are respectively wound on the bolts at the root parts of the ultra-long single blades and the appointed positions close to the blade tip side; the steel wire ropes wound in the electric traction winch are respectively connected with two special wind-collecting nylon ropes on the ultra-long single blade; starting a main crane to lift the ultra-long single blade, controlling the main crane to rotate, and controlling a lifting hook of the main crane to enable the ultra-long single blade to move to the same horizontal height as the hub; and controlling two steel wire ropes on the electric traction winch to finely adjust the front-back left-right offset angle of the ultra-long single blade until all bolts are inserted into holes corresponding to the hubs, and completing the installation of the ultra-long single blade. The invention has the advantages of improving the safety and the installation efficiency of the high-altitude installation operation of the offshore wind turbine, and reducing the cost of offshore wind power construction.

Description

A method for hoisting ultra-long fan blades

Technical field

The invention relates to the technical field of fan blade hoisting, and in particular to a method for hoisting ultra-long fan blades.

Background technique

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 single unit capacity of offshore wind turbines is getting larger and larger. The world's first 16MW ultra-large capacity offshore wind turbine has been installed in China. Successfully connected to the grid to generate electricity.

The marine weather is changing rapidly. The installation of ultra-large-capacity wind turbine components at sea is easily affected by sea conditions such as wind, waves, and swells. The hoisting construction is difficult, especially for ultra-long blades of 123 meters and above. On the one hand, the blade length exceeds 120 meters. However, it is light in weight and swings with the wind when it is hoisted to an altitude of more than 150 meters. It is easy to collide with the lifting arm frame, which can easily cause safety accidents such as lifting collisions. On the other hand, the blade and hub docking process requires high precision, requiring more than 100 bolts to be inserted neatly into the corresponding bolt holes. It is difficult to adjust the blade docking angle with the existing blade lifting scheme. Although the blade clamping equipment has a fine-tuning function, its pulling force is limited. , the rotation angle adjustment range is too small, and the vibration of the blades at high altitude also affects the docking efficiency, resulting in the docking time being too long and affecting the installation efficiency during the construction window period.

Contents of the invention

In view of 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 high-altitude swinging of the blades due to excessive instantaneous wind and high-altitude vibration of the blades affecting installation efficiency.

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

S1. Use the main crane and auxiliary crane to hoist the extra-long single blade to the main deck. After installing and checking the root connecting 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. , install the blade clamp at the designated position of the extra-long single blade;

S2. Use special wind-catching nylon ropes to wrap around the bolts at the root of the extra-long single blade and at designated positions near the blade tip;

S3. Install an electric traction winch at the main hook of the main crane, and use the steel wire rope wound in the electric traction winch to connect to the two special wind-catching nylon ropes on the extra-long single blade. Use a special shackle group to connect the connections;

S4. Start the main crane to start lifting the ultra-long single blade. When the ultra-long single blade is lifted vertically to the specified height, start the electric traction winch to rewind the wire rope, adjust the orientation of the ultra-long single blade, and tighten the wire rope;

S5. Control the main crane to rotate slowly, stop when the blade root of the ultra-long single blade rotates to a position 2-3m away from the fan hub, observe the high-altitude deflection of the ultra-long single blade, and adjust the traction wire rope when the instantaneous wind force is too strong. the tightness and start the main crane rotation again;

S6. According to the relative height of the ultra-long single blade and the wheel hub, control the main crane hook to move the ultra-long single blade to the same level as the wheel hub, and continue to rotate into position;

S7. When the root bolt of the ultra-long single blade is 0.5m away from the bolt hole, observe the hole, respectively control the two wire ropes on the electric traction winch to fine-tune the front, rear, left, and right offset angles of the ultra-long single blade, and slowly align the holes until all Insert the bolts into the corresponding holes in the hub to complete the installation of the extra-long single blade.

Preferably, a first traction wire rope and a second traction wire rope are wound on the electric traction winch, and the first traction wire rope and the second traction wire rope are respectively wound on two winding reels of the electric traction winch, and the ultra-long single The wind-catching nylon rope arranged at the root of the blade is the wind-catching nylon rope at the blade root. The wind-catching nylon rope arranged on the blade tip side of the ultra-long single blade is the blade side wind-catching nylon rope. The first traction wire rope is connected to the blade side wind-catching nylon rope. Rope, the second traction wire rope is connected to the wind-catching nylon rope at the root of the blade.

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 part of the triangular bracket is connected to the boom, and both ends of the triangular bracket are rotated and installed with top angles Guide pulleys, the first traction wire rope and the second traction wire rope are both guided by the arm guide pulleys, and respectively guided by the two vertex guide pulleys at both ends of the triangle bracket.

Preferably, the method for fine-tuning the front, rear, left and right of the ultra-long single blade in step S7 includes:

S701. By simultaneously rewinding the first traction wire rope and the second traction wire rope, pulling both ends of the ultra-long single blade to move toward the main crane at the same time, achieving unidirectional translation adjustment;

S702. By winding up the first traction wire rope and unwinding the second traction wire rope, the blade root of the ultra-long single blade is pulled to move away from the main crane, and the ultra-long single blade is adjusted during the movement. The leaf root angle;

S703. By unwinding the first traction wire rope and winding up the second traction wire rope, the blade root of the ultra-long single blade is pulled to move close to the main crane, and the ultra-long single blade is adjusted during the movement. leaf root angle.

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

1. By setting up a mechanical traction nylon rope set to replace the manual wind gathering method that only relies on the blade clamp and the deck surface, it effectively solves the industry problem of unsafe docking of ultra-long single blades at high altitudes and ensures the safety and safety of ultra-long blades. Reliable offshore construction operations can greatly shorten the high-altitude docking time and improve the installation efficiency of offshore ultra-large-capacity wind turbine blades compared with the traditional ultra-long single blade docking solution.

2. By setting up a traction nylon rope to connect the ultra-long single blade, the ultra-long single blade can be tightened with the auxiliary hook of the main crane during the installation process to prevent the ultra-long single blade from shaking at high altitude.

3. Connect the wind-catching nylon ropes at both ends of the ultra-long single blade through two traction wire ropes. By adjusting the rewinding and unwinding of the two traction wire ropes, the end of the ultra-long single blade can be rotated and adjusted to improve the bolts at the root of the ultra-long single blade. The efficiency of docking with the through hole of the fan hub improves the installation efficiency of ultra-long single blades.

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 angles and large traction force is used to ensure that the blade remains stationary in the air or achieves forward, backward, left, and right movement. Angle adjustment in four directions enables quick alignment.

Description of the drawings

Figure 1 is a diagram of the hoisting scheme of an ultra-long single blade in an embodiment of the present invention.

Figure 2 is a hoisting top view of the ultra-long single blade in the embodiment of the present invention.

In the above drawings: 1. Extra-long single blade; 2. Blade clamp; 3. Blade side nylon rope for catching wind; 4. Blade root nylon rope for catching wind; 5. First traction wire rope; 6. Second traction wire rope; 7 , Top angle guide pulley; 8. Boom guide pulley; 9. Electric traction winch; 10. Wheel hub; 11. Triangular bracket.

Detailed ways

The technical solutions in the present invention will be further described below in conjunction with the accompanying drawings and examples.

As shown in Figure 1 and Figure 2. The invention proposes a method for hoisting ultra-long wind turbine blades, which includes the following steps:

S1. Use the main crane and auxiliary crane to hoist the extra-long single blade 1 to the main deck. After installing and checking the connecting bolts of the extra-long single blade 1, install the extra-long single blade 1 on the auxiliary hook of the main crane. Special blade clamp 2, install the blade clamp 2 at the designated position of the extra-long single blade 1;

S2. Use special wind-catching nylon ropes to wrap around the bolt at the root of the ultra-long single blade and at the designated position near the blade tip;

S3. Install the electric traction winch 9 at the main hook of the main crane. Use the steel wire rope wound in the electric traction winch 9 to connect with the two special wind-catching nylon ropes on the ultra-long single blade 1. Use a special shackle group to connect the connections. ;

S4. Start the main crane to start lifting the ultra-long single blade 1. When the ultra-long single blade 1 is lifted vertically to the specified height, start the electric traction winch 9 to rewind the wire rope, adjust the orientation of the ultra-long single blade 1, and tighten the wire rope. ;

S5. Control the main crane to rotate slowly, stop when the blade root of the ultra-long single blade 1 rotates to a position 102-3m away from the fan hub, observe the high-altitude deflection of the ultra-long single blade 1, and adjust when the instantaneous wind force is too strong. Adjust the tightness of the traction wire rope and start the main crane rotation again;

S6. According to the relative height of the ultra-long single blade 1 and the hub 10, control the main crane hook so that the ultra-long single blade 1 moves to the same level as the hub 10, and continues to rotate into position;

S7. When the bolt of the ultra-long single blade 1 is 0.5m away from the bolt hole, observe the hole, respectively control the two wire ropes on the electric traction winch 9 to fine-tune the front, rear, left, and right offset angles of the ultra-long single blade 1, and slowly adjust the hole. , until all the bolts are inserted into the corresponding holes of the hub 10, and the installation of the extra-long single blade 1 is completed.

Install the triangular bracket 11 on the main lifting boom of the offshore wind turbine installation platform. The triangular bracket 11 has an isosceles triangle structure. The middle part of the triangular bracket 11 is fixed on the boom. Vertices are installed on the two outer vertices of the triangular bracket 11. The guide pulley 7 is installed at the appropriate position on the middle and lower part of the boom. Two sets of 20-ton winches, namely electric traction winches 9, are installed on the main crane's slewing chassis. Two sets of wire ropes are wound on the two sets of winches, one for the first. The traction wire rope 5 and the second traction wire rope 6, the first traction wire rope 5 and the second traction wire rope 6 respectively connect the ultra-long single blade 1 to the tip side wind nylon rope and the blade root.

Two sets of traction wire ropes are used to connect the blade root and the blade tip side wind rope, and the main crane auxiliary hook is used to achieve the fixation of the ultra-long single blade 1. Even under the conditions where the instantaneous wind speed is greater than 10m/s, the ultra-long blade stays at high altitude. The blades can still remain relatively stationary.

As shown in Figure 1 and Figure 2. The electric traction winch 9 is wound with a first traction wire rope 5 and a second traction wire rope 6. The first traction wire rope 5 and the second traction wire rope 6 are respectively wound on the two winding reels of the electric traction winch 9. The wind-catching nylon rope arranged at the root of the ultra-long single blade 1 is the wind-catching nylon rope 4 at the blade root. The wind-catching nylon rope arranged near the blade tip side of the ultra-long single blade 1 is the blade-side wind-catching nylon rope 3. The first traction The steel wire rope 5 is connected to the wind-catching nylon rope 3 on the blade side, and the second traction wire rope 6 is connected to the wind-catching nylon rope 4 at the blade root.

as shown in picture 2. A boom guide pulley 8 is rotatably installed in the middle of the boom of the main crane. A triangular bracket 11 is vertically installed on the top of the main crane. The middle part of the triangular bracket 11 is connected to the boom. Both ends of the triangular bracket 11 are rotatably installed. Angle guide pulley 7, the first traction wire rope 5 and the second traction wire rope 6 are both guided by the boom guide pulley 8, and are guided by the two vertex guide pulleys 7 at both ends of the triangle bracket 11 respectively.

As shown in Figure 1 and Figure 2. The method for fine-tuning the front, rear, left and right of the ultra-long single blade 1 in step S7 includes:

S701. By simultaneously winding up the first traction wire rope 5 and the second traction wire rope 6, pulling both ends of the ultra-long single blade 1 to move toward the main crane at the same time, achieving unidirectional translation adjustment;

S702. By winding up the first traction wire rope 5 and unwinding the second traction wire rope 6, the blade root of the ultra-long single blade 1 is moved away from the main crane, and the ultra-long single blade 1 is adjusted during the movement. The angle of the leaf root of the long single blade 1;

S703. By unwinding the first traction wire rope 5 and winding up the second traction wire rope 6, the blade root of the ultra-long single blade 1 is moved close to the main crane, and the ultra-long single blade 1 is adjusted during the movement. The angle of the leaf root of the long single blade 1.

Claims (4)

1. A method for hoisting ultra-long wind turbine blades, which is characterized by including the following steps: S1. Use the main crane and auxiliary crane to hoist the extra-long single blade (1) to the main deck. After installing and checking the root connecting bolts of the extra-long single blade, install the extra-long single blade on the auxiliary hook of the main crane. (1) Special blade clamp (2), install the blade clamp (2) at the designated position of the extra-long single blade (1); S2. Use special wind-catching nylon ropes to wrap around the bolts at the root of the extra-long single blade (1) and at designated positions near the blade tip; S3. Install the electric traction winch (9) at the main hook of the main crane. Use the steel wire rope wrapped in the electric traction winch (9) to connect to the two special wind-catching nylon ropes on the extra-long single blade (1). Use Special shackle set for connection; S4. Start the main crane to start lifting the ultra-long single blade (1). When the ultra-long single blade (1) is lifted vertically to the specified height, start the electric traction winch (9) to wind up the wire rope. Adjust the orientation and tighten the wire rope; S5. Control the main crane to rotate slowly, stop rotating when the blade root of the ultra-long single blade (1) rotates to a position 2-3m away from the fan hub (10), observe the high-altitude deflection of the ultra-long single blade (1), and When the instantaneous wind force is too strong, adjust the tightness of the traction wire rope and start the main crane rotation again; S6. According to the relative height of the extra-long single blade (1) and the hub (10), control the main crane hook so that the extra-long single blade (1) moves to the same level as the hub (10), and continues to rotate into position; S7. When the root bolt of the ultra-long single blade (1) is 0.5m away from the bolt hole, observe the hole and control the two wire ropes on the electric traction winch (9) to offset the ultra-long single blade (1) front, back, left and right. Fine-tune the angle and slowly align the holes until all bolts are inserted into the corresponding holes of the hub (10) to complete the installation of the extra-long single blade (1). 2. A method for hoisting ultra-long wind turbine blades as claimed in claim 1, characterized in that: the electric traction winch (9) is wound with a first traction wire rope (5) and a second traction wire rope (6). The traction wire rope (5) and the second traction wire rope (6) are respectively wound on the two winding reels of the electric traction winch (9). The wind-catching nylon rope arranged at the root of the ultra-long single blade (1) is the blade root. Wind-catching nylon rope (4), the wind-catching nylon rope arranged on the blade tip side of the ultra-long single blade (1) is the blade-side wind-catching nylon rope (3), and the first traction wire rope (5) is connected to the blade-side wind-catching nylon rope The nylon rope (3) and the second traction wire rope (6) are connected to the wind-catching nylon rope (4) at the root of the blade. 3. A method for hoisting ultra-long wind turbine blades as claimed in claim 2, characterized in that: a boom guide pulley (8) is rotatably installed in the middle of the boom of the main crane, and a triangular bracket is vertically installed on the top of the main crane. (11), the middle part of the triangular bracket (11) is connected to the arm, both ends of the triangular bracket (11) are rotationally installed with top angle guide pulleys (7), the first traction wire rope (5) and the second traction wire rope (6) are guided by the arm guide pulley (8) and guided by the two corner guide pulleys (7) at both ends of the triangle bracket (11). 4. An ultra-long wind turbine blade hoisting method as claimed in claim 3, characterized in that: the method for fine-tuning the front, rear, left and right of the ultra-long single blade (1) in step S7 includes: S701. By winding up the first traction wire rope (5) and the second traction wire rope (6) at the same time, pull both ends of the ultra-long single blade (1) to move toward the main crane at the same time to achieve unidirectional translation. Adjustment; S702. By winding up the first traction wire rope (5) and unwinding the second traction wire rope (6), the blade root of the ultra-long single blade (1) is pulled away from the main crane and moved on Adjust the blade root angle of the ultra-long single blade (1) during movement; S703. By unwinding the first traction wire rope (5) and winding up the second traction wire rope (6), the blade root of the ultra-long single blade (1) is pulled to move close to the main crane, and Adjust the blade root angle of the extra-long single blade (1) while moving.