A replacement device for the yaw reducer of a wind turbine generator set

Abstract

This utility model relates to the field of wind turbine maintenance technology and discloses a yaw reducer replacement device for wind turbines. It includes two circular columns, each topped with the same I-beam. The dimensions of the top of the circular columns are consistent with the contact surface dimensions of the I-beam. This utility model avoids lateral and axial tilting by using a cross-shaped fixed base. It does not employ a bottom wheel structure, requiring manual placement and lifting for movement. Although this increases the number of steps, the space in the wind turbine nacelle is small, so the workload is not excessively increased. It also avoids the risk of injury from tool tipping over. Furthermore, the adjustment mechanism keeps the device horizontal and stable, improving stability during lifting and preventing tilting or tipping. Additionally, the anti-slip pad at the bottom of the lifting block increases friction with the ground, further enhancing stability.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine generator maintenance, and in particular to a replacement device for the yaw reducer of a wind turbine generator. Background Technology

[0002] In the field of wind power generation, the yaw reducer is a key component of wind turbine generator sets. Its function is to control the wind turbine to always face the wind direction in order to capture wind energy to the maximum extent. Due to the long-term exposure to alternating loads and harsh environments, the yaw reducer is prone to failure and requires regular maintenance. When serious mechanical failures such as internal tooth jamming or tooth breakage occur, it needs to be replaced. The wind turbine generator set yaw reducer replacement device is a special equipment used to assist in the replacement of the wind turbine generator set yaw reducer.

[0003] Yaw reducers typically weigh over 800 kg, making manual replacement difficult. Firstly, the narrow space in wind turbine nacelles makes it difficult to accommodate large, specialized hoisting equipment, and the lack of suitable hoisting points forces replacement work to rely heavily on manpower. This not only results in high labor intensity but also poses serious safety hazards such as equipment tipping over and injuries. Secondly, existing replacement devices are often complex in structure, inconvenient to disassemble and assemble, leading to long operation times and low efficiency, which in turn increases equipment downtime and overall maintenance costs. Therefore, an improved yaw reducer replacement device for wind turbines is proposed. Utility Model Content

[0004] In view of the above-mentioned existing methods that rely on a large amount of manpower, which not only involve high labor intensity, but also pose serious safety hazards such as tool overturning and mechanical injury, as well as the problems of complex replacement device structure and inconvenient disassembly and assembly, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a yaw reducer replacement device for a wind turbine generator set, comprising two circular columns, with the same I-beam at the top of the two circular columns, the top dimension of the circular columns being consistent with the contact surface dimension of the I-beam, four bolt holes respectively opened at the top of the circular columns and at the bottom of both ends of the I-beam, the two circular columns being threadedly connected to the I-beam by eight fastening bolts, and a cross-shaped fixing base welded to the bottom of the circular columns, the cross-shaped fixing base including an adjustment mechanism;

[0006] The four corners of the cross-shaped fixing base are rotatably connected to limit rings. The top of the limit ring passes through the inside of the cross-shaped fixing base and is fixedly connected to a throttle nut. The bottom of the throttle nut contacts the top of the cross-shaped fixing base. The front part of the throttle nut is threadedly connected to a threaded rod. The bottom of the threaded rod passes through the through hole and is fixedly connected to a lifting block.

[0007] As a preferred embodiment, the lifting block is fitted into the inner wall of the storage slot, and an anti-slip pad is provided at the bottom of the lifting block.

[0008] As a preferred embodiment, a pulley trolley is provided below the I-beam, and four rolling pulleys are rotatably connected to both sides of the interior of the pulley trolley via bearings. The rolling pulleys are rotatably connected to both sides of the interior of the I-beam.

[0009] As a preferred embodiment, a fixing bolt is threadedly connected to one side of the pulley trolley, and a fixing locking pin hole is opened on one side of the I-beam. One end of the fixing bolt is threadedly connected to the inner wall of the fixing locking pin hole.

[0010] As a preferred embodiment, the bottom of the pulley trolley is fixedly connected to a fixed hook, and a hand-operated hoist is installed below the fixed hook.

[0011] As a preferred option, the circular column is made of high-strength load-bearing material, the I-beam is made of national standard thickened steel, and the fastening bolts are M20 or higher high-strength bolts.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects:

[0013] 1. This utility model avoids lateral and axial tilting by using a cross-shaped fixed base. It does not use a bottom wheel structure and requires manual placement and lifting for movement. Although this increases the number of steps, the space in the wind turbine nacelle is not large, so the workload is not increased too much. It also avoids the risk of mechanical injury from tooling tipping over. Furthermore, the adjustment mechanism keeps the device horizontal and stable, improving stability during the lifting process and preventing the tooling from tilting or tipping over. At the same time, the anti-slip pad at the bottom of the lifting block increases the friction with the ground, further enhancing stability.

[0014] 2. This utility model uses a gantry structure tooling combined with a pulley trolley and a hand-operated hoist, which allows only three people to safely and reliably disassemble, replace, and install yaw reducers. This reduces labor costs and risks, and solves problems such as the difficulty of replacing heavy reducers manually, the lack of lifting points in the cabin space, and the transportation of reducers within the airport. It has high practicality and economy.

[0015] 3. This utility model only requires finding a suitable placement point, using an I-beam and two circular columns, and then fixing it with eight fastening bolts of no less than M20. It is easy to disassemble and assemble, and the structure is relatively simple. Using national standard thickened steel, it can ensure that it can lift heavy objects of 2t and above without the need for large professional hoisting equipment, thus reducing equipment purchase and operating costs. At the same time, its operation is simple, which can reduce manual labor intensity and working time, improve work efficiency, and thus reduce overall maintenance costs, resulting in good cost-effectiveness. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a side view of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the upper disassembled structure of this utility model;

[0019] Figure 4 This is a cross-sectional structural diagram of the cross-shaped fixing base in this utility model;

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Circular column; 2. I-beam; 21. Fixing lock pin hole; 3. Fastening bolt; 4. Cross-shaped fixing base; 41. Through hole; 42. Storage slot; 5. Pulley trolley; 51. Rolling pulley; 52. Fixing hook; 53. Fixing bolt; 6. Hand chain hoist; 7. Adjustment mechanism; 71. Limit ring; 72. Rotary nut; 73. Threaded rod; 74. Lifting block. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] Reference Figures 1-4 This is the first embodiment of the present invention, which provides a yaw reducer replacement device for a wind turbine generator set, including two circular columns 1. The top of the two circular columns 1 is provided with the same I-beam 2. The top size of the circular column 1 is the same as the contact surface size of the I-beam 2. Four bolt holes are respectively opened at the top of the circular column 1 and the bottom of both ends of the I-beam 2. The two circular columns 1 are threadedly connected to the I-beam 2 by eight fastening bolts 3. A cross-shaped fixing base 4 is welded to the bottom of the circular column 1. The cross-shaped fixing base 4 includes an adjustment mechanism 7.

[0024] The four corners of the cross-shaped fixed base 4 are rotatably connected to limit rings 71. The top of the limit ring 71 passes through the interior of the cross-shaped fixed base 4 and is fixedly connected to a throttle nut 72. The bottom of the throttle nut 72 contacts the top of the cross-shaped fixed base 4. The throttle nut 72 is threadedly connected to a threaded rod 73. The bottom of the threaded rod 73 passes through the interior of the through hole 41 and is fixedly connected to a lifting block 74.

[0025] The lifting block 74 is fitted into the inner wall of the storage slot 42, and an anti-slip pad is provided at the bottom of the lifting block 74.

[0026] The circular column 1 is made of high-strength load-bearing material, the I-beam 2 is made of national standard thickened steel, and the fastening bolt 3 is a high-strength bolt of M20 or above.

[0027] During use, the two circular columns 1 are connected to the I-beam 2 by eight fastening bolts 3, forming a stable top beam structure. The cross-shaped fixing base 4 uses a cross-shaped method to avoid lateral and axial tilting. The structure does not use bottom wheels, so it needs to be moved by manual placement and lifting. Although this increases the process, the space in the wind turbine nacelle is not large, so the workload is not increased too much, and the risk of mechanical injury from tooling tipping over is avoided. The circular columns 1 are made of high-strength load-bearing materials, the I-beam 2 is made of national standard thickened steel, and the fastening bolts 3 are M20 or higher high-strength bolts, ensuring the stability and load-bearing capacity of the overall structure. This design only requires finding a suitable placement point, and then fixing it with one I-beam 2 and two circular columns 1, and using eight fastening bolts 3 with a size not less than M20. It is easy to disassemble and assemble, and the assembly and disassembly are convenient.

[0028] When the device is placed on an uneven surface inside the cabin, rotating the throttle nut 72 will fix the throttle nut 72 in a vertical position using the limiting ring 71. The rotation of the throttle nut 72 will cause the threaded rod 73 to move axially. As the threaded rod 73 descends, the lifting block 74 will also move downward. By adjusting the height of the lifting blocks 74 at the four corners, the device can be kept horizontal and stable. When the height does not need to be adjusted, the lifting block 74 can be fitted into the inner wall of the storage slot 42, so that the cross-shaped fixed base 4 is in a flat state, which improves the stability during the lifting process and prevents the tooling from tilting or tipping over. At the same time, the anti-slip pad at the bottom of the lifting block 74 increases the friction with the ground, further enhancing stability.

[0029] Reference Figures 1-4 This is the second embodiment of the present utility model. The difference between this embodiment and the first embodiment is that: a pulley trolley 5 is provided below the I-beam 2, and four rolling pulleys 51 are rotatably connected to the two sides inside the pulley trolley 5 through bearings. The rolling pulleys 51 are rotatably connected to the two sides inside the I-beam 2.

[0030] A fixing bolt 53 is threadedly connected to one side of the pulley trolley 5, and a fixing lock pin hole 21 is opened on one side of the I-beam 2. One end of the fixing bolt 53 is threadedly connected to the inner wall of the fixing lock pin hole 21.

[0031] A fixed hook 52 is fixedly connected to the bottom of the pulley trolley 5, and a hand chain hoist 6 is installed below the fixed hook 52.

[0032] During use, the pulley trolley 5 can roll on both sides inside the I-beam 2 via four rolling pulleys 51, allowing the pulley trolley 5 to move laterally along the I-beam 2. When the pulley trolley 5 is not needed, the fixing bolt 53 is tightened so that one end is screwed into the fixing locking pin hole 21 on one side of the I-beam 2, fixing the pulley trolley 5 in the designated position and preventing it from sliding in subsequent operations.

[0033] The working principle of this utility model is as follows:

[0034] Tooling on the tower: After disassembly, the equipment is transported to the nacelle using a nacelle crane through the lifting port, and then assembled in the nacelle;

[0035] Tooling assembly: At the part that needs to be lifted, use eight fastening bolts 3 to connect the I-beam 2 and the two round columns 1. The pulley trolley 5 is usually installed on the I-beam 2 and is not disassembled.

[0036] Remove obstructions and find a suitable placement point: First, dismantle obstructions such as the engine room floor and yaw motor, drain the oil from the yaw reducer, find a suitable tooling placement point, and press the center point of the two cross-shaped fixed bases 4 onto the load-bearing point.

[0037] Replacement of the yaw reducer: Use a hand chain hoist 6 and a lifting sling to tighten the lifting lugs on both sides of the yaw reducer, pull the guide chain to lift the yaw reducer, and have someone assist in stabilizing the two circular columns 1 to prevent it from tipping over. After the reducer is suspended in the air, one person needs to push the reducer through the pulley trolley 5 to move it to a safe and stable location, lower the reducer, and after the guide chain is no longer under stress, the personnel on both sides of the circular columns 1 lift the tooling to move it. When it is necessary to move the reducer, the hand chain hoist 6 is used again. Finally, the yaw reducer is transported to the lifting hole in the engine room and unloaded using the engine room crane. The same process can be repeated in reverse.

[0038] Work completed: After confirming that the yaw reducer replacement is finished, disassemble the tooling into three parts, bundle them together, and use the nacelle crane to transport them to the bottom of the tower.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A yaw reducer replacement device for a wind turbine generator set, comprising two circular columns (1), characterized in that: The two circular columns (1) are provided with the same I-beam (2) at their top ends. The top dimensions of the circular columns (1) are the same as the contact surface dimensions of the I-beam (2). The top of the circular columns (1) and the bottom of both ends of the I-beam (2) are respectively provided with four bolt holes. The two circular columns (1) are connected to the I-beam (2) by eight fastening bolts (3). The bottom of the circular columns (1) is welded with a cross-shaped fixing base (4). The cross-shaped fixing base (4) includes an adjustment mechanism (7). The four corners of the cross-shaped fixed base (4) are rotatably connected to limit rings (71). The top of the limit ring (71) passes through the interior of the cross-shaped fixed base (4) and is fixedly connected to a throttle nut (72). The bottom of the throttle nut (72) is in contact with the top of the cross-shaped fixed base (4). The throttle nut (72) is threadedly connected to a threaded rod (73) at its temporal part. The bottom of the threaded rod (73) passes through the through hole (41) and is fixedly connected to a lifting block (74).

2. The yaw reducer replacement device for a wind turbine generator set according to claim 1, characterized in that: The lifting block (74) is fitted into the inner wall of the storage groove (42), and the bottom end of the lifting block (74) is provided with an anti-slip pad.

3. The yaw reducer replacement device for a wind turbine generator set according to claim 1, characterized in that: A pulley trolley (5) is provided below the I-beam (2). Four rolling pulleys (51) are rotatably connected to the two sides of the inside of the pulley trolley (5) through bearings. The rolling pulleys (51) are rotatably connected to the two sides of the inside of the I-beam (2).

4. The yaw reducer replacement device for a wind turbine generator set according to claim 3, characterized in that: The pulley trolley (5) has a threaded connection to a fixing bolt (53) on one side, and a fixing lock pin hole (21) is opened on one side of the I-beam (2). One end of the fixing bolt (53) is threaded to the inner wall of the fixing lock pin hole (21).

5. A wind turbine generator yaw reducer replacement device according to claim 3, characterized in that: The bottom of the pulley trolley (5) is fixedly connected to a fixed hook (52), and a hand-operated hoist (6) is provided below the fixed hook (52).

6. The yaw reducer replacement device for a wind turbine generator set according to claim 1, characterized in that: The circular column (1) is made of high-strength load-bearing material, the I-beam (2) is made of national standard thickened steel, and the fastening bolt (3) is a high-strength bolt of M20 or above.

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