A wind turbine nut pre-tightening device

Abstract

The utility model belongs to the technical field of wind turbine, especially relates to a wind turbine generator unit nut pre -tightening device, including base, drive shaft, transmission mounting hole, rotary seat, fixed shaft, electric telescopic handle, connecting shaft, fixed column, adjusting plate, movable slot, limit axle, limit rod, protective sleeve. The wind turbine generator unit nut pre -tightening device, through starting electric telescopic handle, makes electric telescopic handle push connecting shaft, in turn through connecting axle drive rotary seat and carry out the overturning, to make adjusting plate revolve around fixed column, further through the limiting of limit axle, make adjusting plate carry out activity in movable slot's inside, to further drive limit rod and adjust, to limit rod is stuck in the nut position that needs to carry out pre -tightening, further will screw motor install in transmission mounting hole's inside, further through starting screw motor, make screw motor drive whole and revolve through drive shaft, thereby pre -tightening work is carried out to nut.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine technology, specifically to a wind turbine nut pre-tightening device. Background Technology

[0002] In the field of wind power generation, the safe and stable operation of wind turbines is crucial for ensuring power supply and promoting the development of clean energy. As a vital component connecting various parts of a wind turbine, the pre-tightening effect of the nut directly impacts the overall structural strength and operational reliability of the unit. Insufficient nut pre-tightening force can easily lead to loosening under the long-term exposure to strong winds, vibrations, and other complex operating conditions, resulting in component connection failure, equipment malfunction, or even safety accidents. Conversely, excessive pre-tightening force can cause deformation and damage to the nut and connected components, shortening the equipment's service life. Currently, traditional wind turbine nut pre-tightening devices suffer from numerous problems in practical applications. Some devices have simple structures, making it difficult to accurately control the pre-tightening force of the nuts, resulting in unstable pre-tightening effects. Other devices have low levels of automation, relying on manual operation, which is not only inefficient but also subject to significant subjectivity and error, making it impossible to guarantee the consistency of pre-tightening force for each nut. Furthermore, existing devices lack effective limiting and protective measures when pre-tightening nuts, easily causing wear on nuts or connecting components and posing certain safety hazards. Therefore, developing a wind turbine nut pre-tightening device that can accurately control pre-tightening force, has a high degree of automation, and possesses reliable limiting and protective functions has become an urgent need to solve the current wind turbine nut pre-tightening problems and improve the operational safety and stability of wind power generation equipment. Utility Model Content

[0003] The purpose of this utility model is to provide a wind turbine nut pre-tightening device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a wind turbine nut pre-tightening device, comprising a base and a drive shaft, the drive shaft being disposed above the base, a transmission mounting hole being disposed above the drive shaft, a rotating seat being disposed inside the base, a fixed shaft being fixedly connected to the inner side of the base, an electric telescopic rod being movably connected to the outer surface of the fixed shaft, a connecting shaft being connected to the other end of the electric telescopic rod, a fixed column being connected to the top of the base, an adjusting plate being movably connected to the outer surface of the fixed column, a movable groove being opened inside the rotating seat, a limiting shaft being disposed inside the adjusting plate, a limiting rod being connected to the other end of the adjusting plate, and a protective sleeve being disposed on the outer surface of the limiting rod.

[0005] Preferably, the fixed shaft and the electric telescopic rod are movably connected via bearings.

[0006] Preferably, the adjusting plate has mounting holes adapted to the fixed column, and a friction-reducing bushing is provided in the mounting holes, the friction-reducing bushing being sleeved on the outer surface of the fixed column.

[0007] Preferably, the protective sleeve is made of elastic rubber material, and the inner wall of the protective sleeve is provided with anti-slip protrusions.

[0008] Preferably, the inner wall of the transmission mounting hole is provided with a keyway, and the output shaft of the rotating motor is provided with a flat key that matches the keyway.

[0009] Preferably, the end of the limiting rod is provided with a magnetic block.

[0010] Preferably, the side of the rotating base is provided with angle scale markings.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This wind turbine nut pre-tightening device, by activating the electric telescopic rod, pushes the connecting shaft, which in turn drives the rotating seat to rotate, causing the adjusting plate to rotate around the fixed column. Further, the adjusting plate is limited by the limiting shaft, allowing it to move within the movable groove, which in turn drives the limiting rod to adjust and lock it in place at the nut position requiring pre-tightening. The tightening motor is then installed inside the transmission mounting hole. Activating the tightening motor causes the entire assembly to rotate via the drive shaft, thus pre-tightening the nut.

[0012] 2. The wind turbine nut pre-tightening device, with its adaptive installation of the adjusting plate and fixed column and the setting of the anti-friction bushing, makes the adjusting plate move flexibly and stably; the limiting rod and its end magnetic block can effectively limit the nut and prevent the nut from shifting during the pre-tightening process; the protective sleeve is made of elastic rubber and has anti-slip protrusions, which can not only protect the nut and connecting parts, but also enhance friction, avoid wear and slippage, and improve the safety and reliability of the device. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the bottom structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the base of this utility model; Figure 4 This is a schematic diagram of the limiting shaft structure of this utility model.

[0014] In the diagram: 1. Base; 2. Drive shaft; 3. Transmission mounting hole; 4. Rotary seat; 5. Fixed shaft; 6. Electric telescopic rod; 7. Connecting shaft; 8. Fixed column; 9. Adjusting plate; 10. Movable groove; 11. Limiting shaft; 12. Limiting rod; 13. Protective sleeve. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-4 This utility model provides a technical solution: a wind turbine nut pre-tightening device, including a base 1 and a drive shaft 2. The drive shaft 2 is disposed above the base 1, and a transmission mounting hole 3 is provided above the drive shaft 2. A rotating seat 4 is disposed inside the base 1. A fixed shaft 5 is fixedly connected to the inner side of the base 1. An electric telescopic rod 6 is movably connected to the outer surface of the fixed shaft 5. The other end of the electric telescopic rod 6 is connected to a connecting shaft 7. A fixed column 8 is connected to the top of the base 1. An adjusting plate 9 is movably connected to the outer surface of the fixed column 8. A movable groove 10 is opened inside the rotating seat 4. A limit shaft 11 is provided on the inner side of the adjusting plate 9. A limit rod 12 is connected to the other end of the adjusting plate 9 for limiting. The outer surface of the rod 12 is provided with a protective sleeve 13. By activating the electric telescopic rod 6, the electric telescopic rod 6 pushes the connecting shaft 7, which in turn drives the rotating seat 4 to rotate. This causes the adjusting plate 9 to rotate around the fixed column 8. The adjusting plate 9 is further limited by the limiting shaft 11, allowing it to move inside the movable groove 10. This further drives the limiting rod 12 to adjust, thus locking the limiting rod 12 in the position of the nut that needs to be pre-tightened. The tightening motor is then installed inside the transmission mounting hole 3. By activating the tightening motor, the motor drives the entire assembly to rotate via the drive shaft 2, thereby pre-tightening the nut.

[0017] The fixed shaft 5 and the electric telescopic rod 6 are movably connected by bearings, so that the electric telescopic rod 6 can rotate flexibly around the fixed shaft 5 during the extension and retraction process, ensuring the smooth movement when the connecting shaft 7 pushes the rotating seat 4 to flip.

[0018] The adjusting plate 9 has mounting holes that are compatible with the fixed column 8, and a friction-reducing bushing is provided in the mounting holes. The friction-reducing bushing is fitted on the outer surface of the fixed column 8, so that the friction is reduced when the adjusting plate 9 rotates around the fixed column 8, thereby improving the smoothness of adjustment and the service life of the device.

[0019] The protective sleeve 13 is made of elastic rubber material. The inner wall of the protective sleeve 13 is provided with anti-slip protrusions, which can increase the friction with the surface of the nut when the limit rod 12 is locked in place, prevent slippage, and at the same time protect the surface of the nut from scratches.

[0020] The inner wall of the transmission mounting hole 3 is provided with a keyway, and the output shaft of the turning motor is provided with a flat key that matches the keyway, so that reliable torque transmission can be achieved between the turning motor and the drive shaft 2, ensuring the power output for pre-tightening the nut.

[0021] The end of the limiting rod 12 is equipped with a magnetic block, which can magnetically attract the nut when it is close to it, assisting the limiting rod 12 to quickly and accurately lock the nut, thus improving work efficiency.

[0022] The side of the rotating seat 4 is marked with angle scales, which can intuitively display the angle of rotation of the rotating seat 4, making it easy for operators to accurately control the position of the adjusting plate 9 and the limit rod 12.

[0023] Working principle: When pre-tightening the nut, the electric telescopic rod 6 is activated. During its extension and retraction, it rotates flexibly due to its movable connection with the fixed shaft 5 via a bearing, pushing the connecting shaft 7 to rotate the rotating seat 4. The adjusting plate 9 is movably connected to the fixed column 8 through a mounting hole with a friction-reducing bushing, allowing it to rotate smoothly around the fixed column 8. Under the limit of the limiting shaft 11, it moves within the movable groove 10 inside the rotating seat 4, thereby driving the limiting rod 12 to adjust. The magnetic block at the end of the limiting rod 12 assists in quickly locking the nut, and the protective sleeve 13 increases the friction between the rod and the nut and prevents scratching the nut. The tightening motor is installed on the drive shaft 2 through the keyway on the inner wall of the transmission mounting hole 3 and the flat key of the output shaft. The tightening motor is activated, and the drive shaft 2 drives the entire structure to rotate, achieving the pre-tightening of the nut. At the same time, the angle scale markings on the side of the rotating seat 4 facilitate the operator to accurately control the position of the limiting rod 12.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A wind turbine nut pre-tightening device, comprising a base (1) and a drive shaft (2), characterized in that: The drive shaft (2) is located above the base (1). A transmission mounting hole (3) is provided above the drive shaft (2). A rotating seat (4) is provided inside the base (1). A fixed shaft (5) is fixedly connected to the inner side of the base (1). An electric telescopic rod (6) is movably connected to the outer surface of the fixed shaft (5). A connecting shaft (7) is connected to the other end of the electric telescopic rod (6). A fixed column (8) is connected to the top of the base (1). An adjusting plate (9) is movably connected to the outer surface of the fixed column (8). An movable groove (10) is provided inside the rotating seat (4). A limiting shaft (11) is provided inside the adjusting plate (9). A limiting rod (12) is connected to the other end of the adjusting plate (9). A protective sleeve (13) is provided on the outer surface of the limiting rod (12).

2. The wind turbine nut pre-tightening device according to claim 1, characterized in that: The fixed shaft (5) and the electric telescopic rod (6) are movably connected by bearings.

3. The wind turbine nut pre-tightening device according to claim 1, characterized in that: The adjusting plate (9) has an installation hole that matches the fixed column (8), and a friction-reducing bushing is provided in the installation hole. The friction-reducing bushing is sleeved on the outer surface of the fixed column (8).

4. A wind turbine nut pre-tightening device according to claim 1, characterized in that: The protective sleeve (13) is made of elastic rubber material, and the inner wall of the protective sleeve (13) is provided with anti-slip protrusions.

5. A wind turbine nut pre-tightening device according to claim 1, characterized in that: The inner wall of the transmission mounting hole (3) is provided with a keyway, and the output shaft of the motor is provided with a flat key that matches the keyway.

6. A wind turbine nut pre-tightening device according to claim 1, characterized in that: The end of the limiting rod (12) is provided with a magnetic block.

7. A wind turbine nut pre-tightening device according to claim 1, characterized in that: The rotating base (4) has angle scale markings on its side.

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