A method for hoisting a single blade of a wind turbine

Abstract

The present invention discloses a method for hoisting a single blade of a wind turbine generator, the method comprising: when hoisting the first blade, driving an electric winch to execute a first winch instruction, and using a crane to install the blade when the winch action corresponding to the first winch instruction is completed; when hoisting the second blade or the third blade, driving the electric winch to execute a second winch instruction, and using a crane to install the blade when the winch action corresponding to the second winch instruction is completed; wherein the first winch instruction includes a winch rotation instruction, and the second winch instruction includes a winch rotation instruction and a winch unbalanced adjustment instruction. The present invention executes a winch rotation instruction when hoisting the first blade, executes a winch rotation instruction and a winch unbalanced adjustment instruction when hoisting the second blade and the third blade, and uses an electric winch to drive the target hub installation surface to keep each hoisting in the optimal position, optimize the crane occupancy time, and reduce the construction difficulty of single blade hoisting.

Description

Technical Field

[0001] The invention relates to the technical field of wind power, and in particular to a method for hoisting a single blade of a wind turbine generator. Background Art

[0002] At present, the installation of wind turbine blades is carried out by assembling three blades and the hub into an impeller on a ground platform at a wind farm or an offshore operating platform, and then using a crane to lift the impeller to high altitude to complete the impeller docking work.

[0003] The single-blade hoisting technology is to upgrade the blade and hub assembly from ground assembly to aerial assembly. A single blade is hoisted separately and docked with the hub in the air. Generally, the three blades of a wind turbine need to be hoisted three times. The assembly process requirements for single-blade hoisting are relatively high. In order to reduce the high-performance requirements for hoisting equipment and minimize the risk of high-altitude operations, each blade needs to be docked with the hub in the horizontal direction. Therefore, before each blade is installed, the hub needs to be turned so that the axis of the hub mounting surface docked with the blade is at a certain angle close to the horizontal. When hoisting a single blade, a turning device is required to rotate the impeller. The impeller with ultra-high torque can be turned so that the axis of the hub mounting surface docked with the blade is adjusted to the required position. After hoisting and installing one blade, the hub is adjusted to the position of the next blade assembly, and the assembly of the three blades is completed one after another.

[0004] With the advancement of technology, the capacity of the unit and the diameter of the impeller are constantly increasing. A winch device is needed to assist in the hoisting of the unit and the replacement of the blades. When the existing electric winch is used to hoist a single blade of a wind turbine, it is necessary to consider the coordination with the crane in an unbalanced state. The crane takes a long time and the hoisting is difficult. Summary of the invention

[0005] The main purpose of the present invention is to provide a method for hoisting a single blade of a wind turbine, aiming to solve the technical problems that when an electric winch is used to hoist a single blade of a wind turbine, coordination with a crane in an unbalanced state needs to be considered, the crane takes a long time to occupy, and the hoisting is difficult.

[0006] To achieve the above object, the present invention provides a method for hoisting a single blade of a wind turbine generator, wherein the blade comprises a first blade, a second blade and a third blade installed in sequence, and the method comprises the following steps:

[0007] When the first blade is hoisted, the electric winch is driven to execute the first winch instruction, and when the winch action corresponding to the first winch instruction is completed, the blade is installed by using the crane;

[0008] When the second blade or the third blade is hoisted, the electric winch is driven to execute the second winch instruction, and when the winch action corresponding to the second winch instruction is completed, the blade is installed by using the crane;

[0009] The first turning gear instruction includes a turning gear rotation instruction, and the second turning gear instruction includes a turning gear rotation instruction and a turning gear unbalance adjustment instruction.

[0010] Optionally, the driving of the electric turning gear to execute the first turning gear instruction, when the turning gear action corresponding to the first turning gear instruction is completed, using a crane to execute the blade installation step specifically includes:

[0011] After the hoisting is ready, the electric winch receives the winch rotation command. After the electric winch executes the winch rotation command, the lock pin position deviation is collected for feedback.

[0012] The electric turning gear can make fine adjustments and position hovering according to the feedback of the lock pin position deviation;

[0013] The electric winch is used to engage the lock pin and brake, and at the end of the winch, the first blade is installed using a crane.

[0014] Optionally, the driving electric turning gear to execute the second turning gear instruction, when the turning gear action corresponding to the second turning gear instruction is completed, using a crane to execute the blade installation step specifically includes:

[0015] After the hoisting is ready, the electric turning gear receives the turning gear unbalance adjustment instruction. After the electric turning gear executes the turning gear unbalance adjustment instruction, the electric turning gear executes the exit lock pin and releases the brake;

[0016] The electric turning gear receives the turning gear rotation command, and after the electric turning gear executes the turning gear rotation command, the lock pin position deviation is collected for feedback;

[0017] The electric turning gear can make fine adjustments and position hovering according to the feedback of the lock pin position deviation;

[0018] The electric winch is used to engage the lock pin and brake, and at the end of the winch, a crane is used to install the second or third blade.

[0019] Optionally, the turning gear rotation instruction is: driving the electric turning gear to control the target hub mounting surface of the wind turbine to rotate to a horizontal position.

[0020] Optionally, when hoisting the second blade or the third blade, the turning gear rotation instruction is 120° clockwise or counterclockwise.

[0021] Optionally, the unbalanced adjustment instruction is: driving the electric turning gear to control the installed blades currently in a horizontal position to move upward to an unbalanced adjustment position.

[0022] Optionally, the unbalanced adjustment position is a position where the installed blade, which is currently in a horizontal position, is rotated 0.5° counterclockwise or clockwise.

[0023] Optionally, the angle range of the position fine-tuning is 0° to 1°, and the fine-tuning accuracy is less than 0.01°.

[0024] Optionally, the hoisting preparation includes that the turning inverter is in normal state, the generator is in normal state, the locking pin is withdrawn, and the brake is released.

[0025] Optionally, the hoisting preparation includes that the turning inverter is in normal state, the generator is in normal state, and the crane has been moved away.

[0026] A method for hoisting a single blade of a wind turbine is proposed in an embodiment of the present invention. The method includes: when hoisting the first blade, driving the electric winch to execute a first winch instruction, and when the winch action corresponding to the first winch instruction is completed, using a crane to install the blade; when hoisting the second blade or the third blade, driving the electric winch to execute a second winch instruction, and when the winch action corresponding to the second winch instruction is completed, using a crane to install the blade; wherein the first winch instruction includes a winch rotation instruction, and the second winch instruction includes a winch rotation instruction and a winch unbalanced adjustment instruction. The present invention executes a winch rotation instruction when hoisting the first blade, and executes a winch rotation instruction and a winch unbalanced adjustment instruction when hoisting the second blade and the third blade, and uses an electric winch to drive the target hub installation surface to keep each hoisting in the optimal position, optimize the crane occupancy time, and reduce the construction difficulty of single blade hoisting. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The figure is a schematic flow chart of a method for hoisting a single blade of a wind turbine according to an embodiment of the present invention.

[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0030] At present, in the relevant technical field, when the existing electric winch is used to hoist a single blade of a wind turbine, it is necessary to consider the coordination with the crane in an unbalanced state, the crane takes a long time and the hoisting is difficult.

[0031] In order to solve this problem, various embodiments of the wind turbine single blade hoisting method of the present invention are proposed. The wind turbine single blade hoisting method provided by the present invention executes a turning gear rotation instruction when hoisting the first blade, executes a turning gear rotation instruction and a turning gear unbalance adjustment instruction when hoisting the second blade and the third blade, and uses an electric turning gear to drive the target hub mounting surface to keep each hoisting in the optimal position, optimize the crane occupancy time, and reduce the construction difficulty of single blade hoisting.

[0032] The embodiment of the present invention provides a method for hoisting a single blade of a wind turbine generator, referring to Figure 1 , Figure 1 The present invention is a schematic diagram of a flow chart of a method for hoisting a single blade of a wind turbine according to an embodiment of the present invention.

[0033] It should be noted that the blades include a first blade, a second blade and a third blade installed in sequence, and the electric winch mentioned in this embodiment can adopt the winch scheme described in the patent previously applied by the applicant (CN202121026354.5-A winch device for a wind turbine generator set). This application will not go into details.

[0034] In this embodiment, the method for hoisting a single blade of a wind turbine generator comprises the following steps:

[0035] Step S100, when hoisting the first blade, drive the electric winch to execute the first winch instruction, and when the winch action corresponding to the first winch instruction is completed, use the crane to install the blade.

[0036] In practical applications, the first turning gear instruction includes a turning gear rotation instruction.

[0037] Specifically, when hoisting the first blade, the following specific steps are adopted:

[0038] After the hoisting is ready, the electric winch receives the winch rotation command. After the electric winch executes the winch rotation command, the lock pin position deviation is collected for feedback. The electric winch performs position fine-tuning and positioning hovering based on the feedback lock pin position deviation. The electric winch executes the locking pin insertion and braking. At the end of the winch, the first blade is installed using a crane.

[0039] It should be noted that the turning gear rotation instruction is: driving the electric turning gear to control the target hub mounting surface of the wind turbine to rotate to a horizontal position.

[0040] Specifically, when the first blade is hoisted, the target hub mounting surface in the initial state is rotated to a horizontal position to be installed. The target hub mounting surface in the initial state can be in any position, and the target hub mounting surface in any position needs to be rotated and adjusted to a horizontal direction so that the first blade can be hoisted.

[0041] In a preferred embodiment, after executing the turning gear rotation instruction, the lock pin position deviation can be further collected and the deviation can be fed back so that the electric turning gear can fine-tune the position according to the fed-back lock pin position deviation. The angle range of the position fine-tuning is 0° to 1°, and the fine-tuning accuracy is less than 0.01°.

[0042] In a preferred embodiment, when performing the first blade lifting, the corresponding lifting preparation includes: the turning inverter is in a normal state, the generator is in a normal state, the locking pin has been withdrawn, and the brake has been released.

[0043] Step S200, when hoisting the second blade or the third blade, drive the electric winch to execute the second winch instruction, and when the winch action corresponding to the second winch instruction is completed, use the crane to install the blade.

[0044] In practical applications, the second turning gear instruction includes a turning gear rotation instruction and a turning gear unbalance adjustment instruction.

[0045] Specifically, when hoisting the second blade or the third blade, the following specific steps are adopted:

[0046] After the hoisting is ready, the electric winch receives the winch unbalance adjustment instruction. After the electric winch executes the winch unbalance adjustment instruction, the electric winch withdraws the lock pin and releases the brake. The electric winch receives the winch rotation instruction. After the electric winch executes the winch rotation instruction, the lock pin position deviation is collected for feedback. The electric winch performs position fine-tuning and positioning hovering according to the feedback lock pin position deviation. The electric winch engages the lock pin and brakes. At the end of the winch, the second blade or the third blade is installed using a crane.

[0047] It should be noted that the turning gear rotation instruction is: driving the electric turning gear to control the target hub mounting surface of the wind turbine to rotate to a horizontal position.

[0048] Specifically, that is, when the first blade or the second blade is being hoisted, the hub of the wind turbine corresponding to the first blade hoisting completion state is rotated so that the target hub mounting surface (the hub mounting surface corresponding to the second blade or the hub mounting surface corresponding to the third blade) is rotated and adjusted to a horizontal direction so that the second blade or the third blade can be hoisted.

[0049] Furthermore, based on the fact that the angle between adjacent blades in a three-blade wind turbine is 120°, it can be pre-set that when the turning gear rotation command is executed, the electric turning gear is driven to control the target hub mounting surface of the wind turbine to rotate 120° clockwise or counterclockwise when the turning gear rotation command is executed, so that the target hub mounting surface is rotated to a horizontal position for hoisting the second blade or the third blade.

[0050] In a preferred embodiment, after executing the turning gear rotation instruction, the lock pin position deviation can be further collected and the deviation can be fed back so that the electric turning gear can fine-tune the position according to the fed-back lock pin position deviation. The angle range of the position fine-tuning is 0° to 1°, and the fine-tuning accuracy is less than 0.01°.

[0051] Taking into account that after the first blade is hoisted, the second blade is hoisted; or after the second blade is hoisted, the third blade is hoisted, the hub of the wind turbine is in an unbalanced state. At this time, if the electric winch is directly controlled to exit the lock pin and release the brake, a large error rotation offset will occur in the hub of the wind turbine. If the second or third blade is to be hoisted, it is necessary to re-detect and calculate the offset angle, and then re-determine the rotation angle of the winch rotation instruction. The process is cumbersome, the hoisting efficiency is low, and it takes up the crane time, further increasing the time used for the blade hoisting process.

[0052] Based on this, this embodiment adds an unbalanced adjustment step when executing the hoisting of the second blade or the third blade. By executing the unbalanced adjustment instruction, a large error rotation offset of the hub of the wind turbine can be avoided.

[0053] Specifically, the unbalanced adjustment instruction is: driving the electric turning gear to control the installed blades currently in a horizontal position to move upward to an unbalanced adjustment position.

[0054] In a preferred embodiment, the unbalanced adjustment position is a position where the installed blade currently in a horizontal position is rotated 0.5° counterclockwise or clockwise. As a result, the currently installed blade is slightly offset upward to offset the error rotation offset of the wheel hub between the electric turning gear executing the exit lock pin and brake release operation and the turning gear rotation instruction, and finally the wheel hub is in a position within a reasonable error range before the turning gear rotation instruction is executed.

[0055] In a preferred embodiment, when performing the lifting of the second blade or the third blade, the corresponding lifting preparation includes: the turning inverter is in a normal state, the generator is in a normal state, and the crane has been moved away.

[0056] It is easy to understand that when performing the hoisting of the first blade, the second blade or the third blade, the position closed loop, speed closed loop and current closed loop of the electric winch control logic need to be satisfied.

[0057] In order to explain the present application more clearly, a specific example of a method for hoisting a single blade of a wind turbine is provided.

[0058] In this embodiment, the method for hoisting a single blade of a wind turbine generator includes a first blade hoisting step, a second blade hoisting step and a third blade hoisting step.

[0059] The first blade hoisting step is characterized by including the following steps: equipment ready; cranking 1 instruction; cranking action; lock pin position deviation feedback; cranking fine adjustment; cranking positioning hovering; lock pin and brake input; cranking end; installation of the first blade. Here, equipment ready includes the cranking inverter state is normal, the generator state is normal, the lock pin has been withdrawn, and the brake has been released.

[0060] The second blade hoisting step is characterized by including the following steps: equipment ready; cranking 2 command; cranking action; withdrawing the lock pin and releasing the brake; cranking 3 command; cranking action; lock pin position deviation feedback; cranking fine adjustment; cranking positioning hovering; putting in the lock pin and brake; cranking end; installing the second blade. Here, equipment ready includes that the cranking inverter is in normal state, the generator is in normal state, and the crane has been removed.

[0061] The third blade hoisting step is characterized by including the following steps: equipment ready; cranking 4 command; cranking action; withdrawing the lock pin and releasing the brake; cranking 5 command; cranking action; lock pin position deviation feedback; cranking fine adjustment; cranking positioning hovering; putting in the lock pin and braking; cranking end; installing the third blade. Here, equipment ready includes that the cranking inverter is in normal state, the generator is in normal state, and the crane has been removed.

[0062] It is easy to understand that the cranking 1 instruction, the cranking 3 instruction and the cranking 5 instruction are the cranking rotation instructions, which are used to rotate the target hub mounting surface of the wind turbine to a horizontal position; the cranking 2 instruction and the cranking 4 instruction are the cranking unbalance adjustment instructions, which are used to offset the error rotation offset of the hub between the electric cranking executing the exit lock pin and releasing the brake operation and executing the cranking rotation instruction.

[0063] The present embodiment provides a method for hoisting a single blade of a wind turbine generator, by executing a turning gear rotation instruction when hoisting the first blade, and executing a turning gear rotation instruction and a turning gear unbalance adjustment instruction when hoisting the second blade and the third blade, and using an electric turning gear to drive the target hub mounting surface to keep each hoisting in the optimal position, optimize the crane occupancy time, and reduce the construction difficulty of single-blade hoisting.

[0064] The above are only preferred embodiments of the invention, and are not intended to limit the patent scope of the invention. Any equivalent structure or equivalent process transformation made using the contents of the invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the invention.

Claims

1. A method for hoisting a single blade of a wind turbine generator, characterized in that: The blade comprises a first blade, a second blade and a third blade which are installed in sequence, and the method comprises the following steps: When the first blade is hoisted, the electric winch is driven to execute the first winch instruction, and when the winch action corresponding to the first winch instruction is completed, the blade is installed by using the crane; When the second blade or the third blade is hoisted, the electric winch is driven to execute the second winch instruction, and when the winch action corresponding to the second winch instruction is completed, the blade is installed by using the crane; Wherein, the first turning gear instruction includes a turning gear rotation instruction, and the second turning gear instruction includes a turning gear rotation instruction and a turning gear unbalance adjustment instruction; The driving electric turning gear to execute the second turning gear instruction, when the turning gear action corresponding to the second turning gear instruction is completed, using the crane to execute the blade installation step specifically includes: After the hoisting is ready, the electric turning gear receives the turning gear unbalance adjustment instruction. After the electric turning gear executes the turning gear unbalance adjustment instruction, the electric turning gear executes the exit lock pin and releases the brake; The electric turning gear receives the turning gear rotation command, and after the electric turning gear executes the turning gear rotation command, the lock pin position deviation is collected for feedback; The electric turning gear can make fine adjustments and position hovering according to the feedback of the lock pin position deviation; The electric winch is used to insert the lock pin and brake. When the winch is finished, the second or third blade is installed by a crane. The unbalanced adjustment instruction is: driving the electric turning gear to control the installed blades currently in a horizontal position to move upward to an unbalanced adjustment position.

2. The method for hoisting a single blade of a wind turbine generator according to claim 1, characterized in that: The driving electric turning gear to execute the first turning gear instruction, when the turning gear action corresponding to the first turning gear instruction is completed, using the crane to execute the blade installation steps, specifically includes: After the hoisting is ready, the electric winch receives the winch rotation command. After the electric winch executes the winch rotation command, the lock pin position deviation is collected for feedback. The electric turning gear can make fine adjustments and position hovering according to the feedback of the lock pin position deviation; The electric winch is used to engage the lock pin and brake, and at the end of the winch, the first blade is installed using a crane.

3. The method for hoisting a single blade of a wind turbine generator according to any one of claims 1 to 2, characterized in that: The turning gear rotation instruction is: driving the electric turning gear to control the target hub mounting surface of the wind turbine to rotate to a horizontal position.

4. The method for hoisting a single blade of a wind turbine generator according to claim 3, characterized in that: When the second blade or the third blade is hoisted, the turning gear rotation instruction is 120° clockwise or counterclockwise.

5. The method for hoisting a single blade of a wind turbine generator according to claim 1, characterized in that: The unbalanced adjustment position is a position where the installed blade, which is currently in a horizontal position, is rotated 0.5° counterclockwise or clockwise.

6. The method for hoisting a single blade of a wind turbine generator according to claim 1 or 2, characterized in that: The angle range of the position fine-tuning is 0°~1°, and the fine-tuning accuracy is less than 0.01°.

7. The method for hoisting a single blade of a wind turbine generator according to claim 2, characterized in that: The lifting preparation includes that the turning inverter is in normal state, the generator is in normal state, the locking pin has been withdrawn, and the brake has been released.

8. The method for hoisting a single blade of a wind turbine generator according to claim 1, characterized in that: The hoisting preparation includes that the turning inverter is in normal status, the generator is in normal status, and the crane has been moved away.

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