Limiting devices for wind turbine generators and wind turbine generators

Abstract

This utility model provides a limiting device for a wind turbine generator and a wind turbine generator itself. The limiting device includes: a main frame; a main shaft structure rotatably mounted on the main frame, the main shaft structure having a limiting helical groove; a gearbox mounted on the main frame, the main shaft structure connected between the input end of the gearbox and the wind turbine rotor; a braking device mounted on the main frame and connected to the output end of the gearbox; and a circumferential locking structure movably mounted on the main frame, capable of being inserted into the limiting helical groove to restrict the circumferential rotation of the main shaft structure. The technical solution of this application effectively solves the problem in related technologies where the use of pin-type locking involves a pin-to-hole process, reducing locking efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wind power technology, and more specifically, to a limiting device for a wind turbine and a wind turbine. Background Technology

[0002] Wind turbine locking devices, such as rotor locks, are crucial components of wind power systems and play a vital role. They enhance the safety of wind turbines, preventing accidental damage, improving operational stability, reducing load and vibration, extending service life, lowering maintenance costs, and increasing reliability. A rotor lock comprises a gearbox, a braking device, and a circumferential locking structure. The braking device is located at the input end of the gearbox, the high-speed section of the wind turbine's transmission. This section features a high-speed rotating shaft with low torque. Utilizing the wheel-axle principle, a gear disc is mounted on the gearbox's output shaft, housing brake calipers and a servo motor. The brake calipers are used for braking and deceleration, while the servo motor adjusts the rotor position, facilitating rotor hoisting and angle adjustment during maintenance.

[0003] The circumferential locking structure is located at the output end of the gearbox, which is the low-speed section of the wind turbine's transmission part. Here, the speed is low but the torque is high. After the wind turbine is decelerated by the braking device, it is further decelerated from the high-speed section to zero speed. Then, the circumferential locking structure, in the form of a pin, locks the turbine near the input end of the gearbox.

[0004] However, using a pin-type locking mechanism involves a pin-to-hole alignment process, which requires repeated adjustments to the hole position, reducing locking efficiency. Utility Model Content

[0005] The main objective of this invention is to provide a limiting device for wind turbine units and a wind turbine unit, so as to solve the problem in the related technology that the locking process involving pin-to-hole locking reduces the locking efficiency.

[0006] To achieve the above objectives, according to one aspect of the present invention, a limiting device for a wind turbine generator is provided, comprising: a main frame; a main shaft structure rotatably mounted on the main frame, the main shaft structure having a limiting helical groove; a gearbox mounted on the main frame, the main shaft structure being connected between the input end of the gearbox and the wind turbine rotor of the wind turbine generator; a braking device mounted on the main frame and connected to the output end of the gearbox; and a circumferential locking structure movably mounted on the main frame, the circumferential locking structure being able to be inserted into the limiting helical groove to restrict the circumferential rotation of the main shaft structure.

[0007] Furthermore, there are multiple limiting spiral grooves, which are spaced apart circumferentially along the main shaft structure, and the circumferential locking structure can be inserted into one of the multiple limiting spiral grooves.

[0008] Furthermore, in the axial direction of the main shaft structure, there is a first distance between the first end of each limiting spiral groove and the end face of the first end of the main shaft structure, and a second distance between the second end of each limiting spiral groove and the end face of the second end of the main shaft structure, both the first distance and the second distance being greater than 0.

[0009] Furthermore, the circumferential locking structure includes a telescopic cylinder mounted on the main frame and a locking component connected to the telescopic cylinder. When the telescopic cylinder extends, it drives the locking component to be inserted into the limiting spiral groove. When the telescopic cylinder retracts, it drives the locking component to disengage from each limiting spiral groove.

[0010] Furthermore, one of the telescopic cylinder and the main frame is provided with a slide rail, and the other of the telescopic cylinder and the main frame is provided with a slide groove. The slide rail extends along the axis parallel to the main shaft structure, and the slide rail can slide and engage with the slide groove.

[0011] Furthermore, the telescopic cylinder includes a cylinder body and a telescopic rod that can be telescopically mounted on the cylinder body. The cylinder body is movable along an axis parallel to the main shaft structure. The locking element includes a connecting seat connected to the telescopic rod and a locking rod connected to the connecting seat. The locking rod can be inserted into the limiting spiral groove.

[0012] Furthermore, the spindle structure includes a first connecting flange connecting the spindle to the end of the spindle, and the gearbox includes a housing connected to the main frame, a gear structure disposed within the housing, and a second connecting flange disposed on the input shaft of the gear structure. The second connecting flange is connected to the first connecting flange, wherein the input shaft of the gear structure forms the input end of the gearbox.

[0013] Furthermore, the braking device includes a brake box mounted on the main frame and a brake wheel rotatably mounted inside the brake box. The output shaft of the gear structure passes through the brake box and is connected to the engine of the wind turbine. The brake wheel is mounted on the output shaft of the gear structure and can rotate synchronously with the output shaft of the gear structure. The inside of the brake box forms a storage space for storing the resistance medium. The output shaft of the gear structure forms the output end of the gear box.

[0014] Furthermore, the braking device also includes a fluid supply tank connected to the brake housing. The fluid supply tank and the brake housing are connected by a connecting pipe, on which a circulation pump is installed.

[0015] According to another aspect of the present invention, a wind turbine is provided, including a wind rotor, a limiting device, and a generator, wherein the limiting device is the limiting device of the wind turbine described above, and the limiting device is connected between the wind rotor and the generator.

[0016] The limiting device for a wind turbine generator, applying the technical solution of this utility model, includes: a main frame, a main shaft structure, a gearbox, a braking device, and a circumferential locking structure. The main shaft structure is rotatably mounted on the main frame and has a limiting helical groove. The gearbox is mounted on the main frame, and the main shaft structure connects the input end of the gearbox to the wind turbine rotor. The braking device is mounted on the main frame and connected to the output end of the gearbox. The circumferential locking structure is movably mounted on the main frame and can be inserted into the limiting helical groove to restrict the circumferential rotation of the main shaft structure. In this way, the wind turbine's rotor drives the main shaft structure to rotate synchronously, which in turn drives the output end of the gearbox to rotate. The braking device is connected to the output end of the gearbox, allowing it to brake the output end and reduce the speed of the wind turbine. As the wind turbine decelerates and further decelerates to zero, the main shaft structure rotates, and the limiting spiral groove on the main shaft structure forms a spiral trajectory. When the circumferential locking structure moves, it can smoothly insert into the limiting spiral groove along the spiral trajectory formed by the limiting spiral groove, thereby restricting the circumferential rotation of the main shaft structure and locking it. This process of smoothly inserting the circumferential locking structure into the limiting spiral groove avoids the pin-to-hole process in related technologies, improving locking efficiency. Therefore, the technical solution of this application effectively solves the problem in related technologies where the use of pin-type locking involves a pin-to-hole process, reducing locking efficiency. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the limiting device for a wind turbine according to the present invention is shown;

[0019] Figure 2 It shows Figure 1 An exploded view of the limiting device of a wind turbine unit;

[0020] Figure 3 It shows Figure 1 A three-dimensional structural diagram of the main shaft structure and locking components of the limiting device for a wind turbine generator set;

[0021] Figure 4 It shows Figure 1 A partial perspective view of the braking device of the limiting device for a wind turbine.

[0022] Figure 5 It shows Figure 1 A three-dimensional structural diagram of the brake box and circulation pump of the limiting device of the wind turbine.

[0023] The above figures include the following reference numerals:

[0024] 10. Spindle structure; 11. Limiting spiral groove; 12. Spindle; 13. First connecting flange;

[0025] 20. Gearbox; 21. Housing; 22. Second connecting flange; 23. Output shaft of gear structure;

[0026] 30. Braking device; 31. Brake box; 311. Output shaft hole; 32. Brake wheel; 33. Liquid supply tank; 34. Circulation pump; 35. Connecting pipe;

[0027] 40. Circumferential locking structure; 41. Locking element; 411. Connecting seat; 412. Locking rod. Detailed Implementation

[0028] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0031] According to one aspect of this application, a limiting device for a wind turbine generator is provided, such as... Figures 1 to 4 As shown, an embodiment of the limiting device for a wind turbine includes: a main frame (not shown), a main shaft structure 10, a gearbox 20, a braking device 30, and a circumferential locking structure 40. The main shaft structure 10 is rotatably mounted on the main frame and has a limiting helical groove 11. The gearbox 20 is mounted on the main frame, and the main shaft structure 10 connects the input end of the gearbox 20 to the wind turbine rotor. The braking device 30 is mounted on the main frame and connected to the output end of the gearbox 20. The circumferential locking structure 40 is movably mounted on the main frame and can be inserted into the limiting helical groove 11 to restrict the circumferential rotation of the main shaft structure 10.

[0032] In the embodiment of the limiting device for wind turbine generators, the wind turbine rotor drives the main shaft structure 10 to rotate synchronously, which in turn drives the output end of the gearbox 20 to rotate. The braking device 30 is connected to the output end of the gearbox 20, enabling the braking device 30 to brake the output end of the gearbox 20. This reduces the speed of the wind turbine rotor. As the wind turbine decelerates and further decelerates to zero, the main shaft structure 10 rotates, and the limiting spiral groove 11 on the main shaft structure 10 forms a spiral trajectory. When the circumferential locking structure 40 moves, it can smoothly insert into the limiting spiral groove 11 along the spiral trajectory formed by the limiting spiral groove 11, thereby restricting the circumferential rotation of the main shaft structure 10 and locking the main shaft structure 10. Thus, the process of smoothly inserting the circumferential locking structure 40 into the limiting spiral groove 11 does not involve the pin-to-hole process in related technologies, improving locking efficiency. Therefore, the technical solution of the limiting device embodiment for wind turbine generators effectively solves the problem in related technologies where the use of pin-type locking involves a pin-to-hole process, reducing locking efficiency. The conical angle formed between the spiral trajectory and the axis of the main shaft, as described above, indicates that the spiral trajectory has a relatively large pitch.

[0033] The aforementioned braking device 30 is fixedly connected to the output end of the gearbox 20 by a pin.

[0034] like Figures 1 to 4 As shown, there are multiple limiting spiral grooves 11, which are spaced apart circumferentially along the spindle structure 10. The circumferential locking structure 40 can be inserted into one of the multiple limiting spiral grooves 11. The arrangement of multiple limiting spiral grooves 11 enhances the flexibility and efficiency of locking. When the spindle structure 10 needs to be locked, the circumferential locking structure 40 can be quickly and accurately inserted into the nearest limiting spiral groove 11 without the need for precise alignment of a specific limiting spiral groove 11. This avoids the tedious steps of repeatedly adjusting the hole position in traditional locking methods, greatly improving the speed and convenience of locking operations. In addition, the layout of multiple limiting spiral grooves 11 provides more insertion path options for the locking component. Even during the rotation of the spindle structure 10, it can ensure that the locking component can smoothly find and enter the groove, achieving instant locking.

[0035] like Figures 1 to 4 As shown, along the axial direction of the main shaft structure 10, there is a first distance between the first end of each limiting spiral groove 11 and the end face of the first end of the main shaft structure 10, and a second distance between the second end of each limiting spiral groove 11 and the end face of the second end of the main shaft structure 10. Both the first and second distances are greater than 0. This design ensures that the circumferential locking structure 40 can move smoothly and unimpeded along the spiral path of the limiting spiral groove 11 during the locking process. Even at both ends of the main shaft structure 10, the locking rod 412 can be accurately inserted into the groove to restrict the circumferential rotation of the main shaft structure 10. When the locking rod 412 engages with the limiting spiral groove 11, the movement of the main shaft structure 10 is constrained, thereby preventing unintentional rotation of the impeller.

[0036] like Figures 1 to 4 As shown, the circumferential locking structure 40 includes a telescopic cylinder (not shown) mounted on the main frame and a locking member 41 connected to the telescopic cylinder. When the telescopic cylinder extends, it causes the locking member 41 to insert into the limiting spiral groove 11. When the telescopic cylinder retracts, it causes the locking member 41 to disengage from each limiting spiral groove 11. As the limiting spiral groove 11 on the main shaft structure 10 decelerates to a standstill with the wind turbine, the telescopic cylinder controls the movement of the locking member 41 until it is inserted into the limiting spiral groove 11, thus completing the positioning and locking of the main shaft structure 10. This avoids the cumbersome operation of traditional pin-to-hole locking, improves locking efficiency, and avoids the possibility of the pin getting stuck after locking, which could lead to the risk of the pin not being able to be pulled out smoothly. When unlocking, the telescopic cylinder retracts, the locking member 41 disengages from the limiting spiral groove 11, and the main shaft structure 10 returns to a free rotation state, providing convenience for subsequent wind turbine operations.

[0037] like Figures 1 to 4 As shown, one of the telescopic cylinder and the main frame is equipped with a slide rail, and the other of the telescopic cylinder and the main frame is equipped with a slide groove. The slide rail extends along a direction parallel to the axis of the main shaft structure 10, and the slide rail can slide and engage with the slide groove. The above-mentioned structural constraints enable the circumferential locking structure 40 to accurately track the path of the limiting spiral groove 11 when moving along the axial direction of the main shaft structure 10, achieving efficient and stable locking operation. The cooperation between the slide rail and the slide groove not only guides the movement of the circumferential locking structure 40, but also avoids possible offset or jamming during the locking process. Thus, when the wind turbine's limiting device performs the locking task, the locking member 41 can smoothly insert into the limiting spiral groove 11, significantly improving locking efficiency and operational safety.

[0038] like Figures 1 to 4 As shown, the telescopic cylinder includes a cylinder body and a telescopic rod telescopically mounted on the cylinder body. The cylinder body is movably mounted along an axis parallel to the main shaft structure 10. The locking element 41 includes a connecting seat 411 connected to the telescopic rod and a locking rod 412 connected to the connecting seat 411. The locking rod 412 can be inserted into the limiting spiral groove 11. During the deceleration of the main shaft structure 10 to zero, the circumferential locking structure 40 can smoothly use the telescopic cylinder's telescopic movement to automatically align and insert the locking rod 412 into the limiting spiral groove 11, thereby restricting the circumferential rotation of the main shaft structure 10 and achieving locking. When the wind turbine is hoisted or the angle is adjusted for maintenance, the mobility of the cylinder body allows the locking rod 412 to push the main shaft structure 10 to rotate, facilitating the hoisting or maintenance angle adjustment of the wind turbine. After the wind turbine is hoisted or the maintenance angle is adjusted, the locking rod 412 can quickly and stably lock the main shaft structure 10, avoiding the risks caused by locking delay.

[0039] like Figures 1 to 4 As shown, the main shaft structure 10 includes a main shaft 12 and a first connecting flange 13 connecting the ends of the main shaft 12. The gearbox 20 includes a housing 21 connected to the main frame, a gear structure disposed within the housing 21, and a second connecting flange 22 disposed on the input shaft of the gear structure. The second connecting flange 22 is connected to the first connecting flange 13, wherein the input shaft of the gear structure forms the input end of the gearbox 20. The above structural arrangement realizes the effective connection of the transmission part of the wind turbine. The main shaft 12 is connected to the wind turbine through the first connecting flange 13, transmitting the torque of the wind turbine to the gearbox 20. The gear structure inside the gearbox 20 can significantly amplify the torque and reduce the rotational speed, so as to facilitate the control of the output end of the gearbox 20 by the subsequent braking device 30. The docking of the second connecting flange 22 and the first connecting flange 13 not only simplifies the assembly process but also ensures the continuity and efficiency of power transmission, thereby optimizing the operating performance of the entire wind turbine.

[0040] Specifically, the first connecting flange 13 is provided with a screw hole, and the second connecting flange 22 is bolted into the screw hole to achieve the connection between the two. The spindle structure 10 also includes a first main bearing and a second main bearing. The first end of the spindle 12 is connected to the main frame through the first main bearing, and the second end of the spindle 12 is connected to the main frame through the second main bearing, so that the spindle 12 can be rotatably connected to the main frame.

[0041] like Figures 1 to 4 As shown, the braking device 30 includes a brake box 31 mounted on the main frame and a brake wheel 32 rotatably mounted within the brake box 31. The output shaft 23 of the gear structure passes through the brake box 31 and connects to the wind turbine's engine. The brake wheel 32 is fitted onto the output shaft 23 of the gear structure and can rotate synchronously with it. The brake box 31 has an internal storage space for storing the resistance medium. The output shaft 23 of the gear structure forms the output end of the gearbox 20. The brake box 31 has a storage space for storing the resistance medium. When the wind turbine's rotor needs to decelerate, the resistance medium is lifted as the brake wheel 32 rotates. The brake wheel 32 decelerates under the resistance of the medium, which in turn reduces the rotor speed via the output shaft 23 of the gear structure. This effectively utilizes the high viscosity of the resistance medium to achieve a fast and smooth deceleration effect, while avoiding the mechanical wear and noise problems that may occur with traditional braking methods. Through this integrated wind turbine limiting device, the braking performance of the wind turbine is improved, operation is more convenient, and it is more suitable for the needs of lightweight and high efficiency. The resistance medium is a decelerating fluid.

[0042] Specifically, the brake housing 31 is provided with an output shaft hole 311 through which the output shaft of the gear structure passes, and a liquid sealing material is provided in the output shaft hole 311 to prevent the resistance medium inside the brake housing 31 from leaking out.

[0043] like Figures 2 to 5 As shown, the braking device 30 also includes a fluid supply tank 33 connected to the brake housing 31. The fluid supply tank 33 and the brake housing 31 are connected by a connecting pipe 35, on which a circulation pump 34 is installed. When the wind turbine rotor needs to decelerate, the circulation pump 34 starts, and decelerating fluid is delivered from the fluid supply tank 33 to the brake housing, forming hydraulic resistance and rapidly reducing the speed of the brake wheel 32, thereby decelerating the wind turbine. When the wind turbine stops, the locking member 41 is inserted into one of the limiting spiral grooves 11 to complete the locking. If the wind turbine angle needs to be adjusted, the locking member 41 moves axially along the main shaft 12, generating torque to finely adjust the wind turbine to the required position, and then stops moving again to relock. The entire process does not require additional hole alignment, significantly improving the efficiency of locking and unlocking, while avoiding the jamming problem that may be caused by traditional pin locking, enhancing the reliability and environmental adaptability of the system. The circulation pump 34 allows the decelerating fluid in the fluid supply tank 33 and the decelerating fluid in the brake housing to flow back and forth.

[0044] In other embodiments, the circulation pump 34 can be directly connected between the supply tank 33 and the brake tank 31. During non-wind turbine rotor deceleration, the deceleration fluid is stored in the supply tank 33.

[0045] According to another aspect of this application, a wind turbine is provided. An embodiment of the wind turbine includes a rotor, a limiting device, and a generator. The limiting device is the aforementioned limiting device for the wind turbine, connected between the rotor and the generator. The cooperation between the limiting helical groove 11 on the main shaft structure 10 and the circumferential locking structure 40 not only ensures the reliability of the locking but also avoids the cumbersome traditional pin positioning, improving the environmental adaptability and maintenance convenience of the wind turbine. Furthermore, the connection between the braking device 30 and the output end of the gearbox 20 provides effective support for rotor deceleration, further strengthening the control of the locking process and ensuring that the rotor can smoothly decelerate to a stop before locking, thereby enhancing the overall performance and reliability of the wind turbine.

[0046] This application provides a method for limiting the rotation of a wind turbine rotor using a limiting device, comprising the following steps:

[0047] Step 1: The wind turbine rotor of the wind turbine is pitched through the pitch control system to reduce its rotational speed to a range within which the rotor locking operation can be performed.

[0048] Step 2, fluid injection. The deceleration fluid stored in the supply tank 33 is pumped to the brake box by the circulation pump 34, and then the circulation pump 34 is turned off.

[0049] Step 3, deceleration. Because the brake chamber is filled with a liquid of a certain viscosity, the brake wheels experience liquid resistance, causing a rapid reduction in rotational speed.

[0050] Step 4, Locking. The locking component is brought close to the main shaft until it is inserted into any of the limiting spiral grooves during the rotation of the main shaft, thus restricting the rotation of the main shaft and locking the impeller.

[0051] Step 5: Adjust the angle if necessary. During the wind turbine installation phase, the locking element can move linearly along the main shaft's axis. Because the locking element is inserted into the limiting spiral groove, the main shaft will rotate under the torque generated by the movement of the locking element. When the wind turbine rotates to the appropriate position, the locking element stops moving linearly, and the wind turbine is locked again.

[0052] In this embodiment, each limiting spiral groove is a recessed groove formed by the downward indentation of the main shaft surface. One limiting spiral groove is arranged at 15° intervals around the main shaft, for a total of 360 / 15=24 grooves. The limiting spiral groove is helical, with the helix having the same taper angle as the main shaft. The helix pitch is relatively large, and the length of the limiting spiral groove on the main shaft is 20%~30% of the pitch. The main shaft spiral advance pin has two degrees of freedom: one is linear movement in the direction away from or near the main shaft, and the other is linear movement along the main shaft axis.

[0053] The technical solution of this application has the following technical effects: First, the components of the limiting device of the wind turbine are highly integrated and small in size, integrating braking, wind turbine angle adjustment and locking into one unit, which is suitable for the current lightweight requirements of wind turbines.

[0054] Second, in the low-speed section, the need for repeated adjustments to the hole position during the traditional pin-type locking process is eliminated, thus improving locking efficiency.

[0055] Third, it eliminates the risk of traditional pin locking where the pin cannot be easily removed after locking, and offers high convenience in locking and unlocking operations with good environmental adaptability.

[0056] Fourth, abandoning the traditional pin-type impeller lock solution, we creatively use a screw with a large pitch spiral shape, similar to "gun barrel rifling", so that the impeller lock fastening action can be operated in real time to "rifling" such as a relatively large number of lines, without the need for the additional action of pins to the holes.

[0057] Fifth, the rifling allows for solid line locking and angle adjustment of the impeller, improving the deceleration and locking functions of the brake wheel without requiring additional facilities and equipment, which is conducive to cost reduction and efficiency improvement.

[0058] In the description of this utility model, it should be understood that "multiple" means a quantity of two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0059] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0060] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0061] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A wind turbine generator defining device, characterized by, include: Main frame; The main shaft structure (10) is rotatably mounted on the main frame, and the main shaft structure (10) is provided with a limiting spiral groove (11). A gearbox (20) is mounted on the main frame, and the main shaft structure (10) is connected between the input end of the gearbox (20) and the wind turbine rotor of the wind turbine unit; A braking device (30) is mounted on the main frame and connected to the output end of the gearbox (20); A circumferential locking structure (40) is movably disposed on the main frame. The circumferential locking structure (40) can be inserted into the limiting spiral groove (11) to restrict the circumferential rotation of the main shaft structure (10).

2. The wind turbine unit defining arrangement according to claim 1, wherein There are multiple limiting spiral grooves (11), and the multiple limiting spiral grooves (11) are arranged at intervals along the circumference of the main shaft structure (10). The circumferential locking structure (40) can be inserted into one of the multiple limiting spiral grooves (11).

3. The wind turbine generator defining arrangement according to claim 1, wherein, In the axial direction of the main shaft structure (10), there is a first distance between the first end of each limiting spiral groove (11) and the end face of the first end of the main shaft structure (10), and a second distance between the second end of each limiting spiral groove (11) and the end face of the second end of the main shaft structure (10), and both the first distance and the second distance are greater than 0.

4. The wind turbine generator unit defining arrangement according to any one of claims 1 to 3, characterized in that, The circumferential locking structure (40) includes a telescopic cylinder disposed on the main frame and a locking member (41) connected to the telescopic cylinder. When the telescopic cylinder extends, it drives the locking member (41) to be inserted into the limiting spiral groove (11). When the telescopic cylinder retracts, it drives the locking member (41) to disengage from each of the limiting spiral grooves (11).

5. The wind turbine unit defining arrangement according to claim 4, wherein One of the telescopic cylinder and the main frame is provided with a slide rail, and the other of the telescopic cylinder and the main frame is provided with a slide groove. The slide rail extends along the axis parallel to the main shaft structure (10) and can slide with the slide groove.

6. The wind turbine unit defining arrangement according to claim 4, wherein The telescopic cylinder includes a cylinder body and a telescopic rod that can be telescopically mounted on the cylinder body. The cylinder body is movably mounted along an axis parallel to the main shaft structure (10). The locking member (41) includes a connecting seat (411) connected to the telescopic rod and a locking rod (412) connected to the connecting seat (411). The locking rod (412) can be inserted into the limiting spiral groove (11).

7. The wind turbine generator unit defining arrangement according to any one of claims 1 to 3, wherein, The spindle structure (10) includes a first connecting flange (13) that connects the spindle (12) to the end of the spindle (12). The gearbox (20) includes a housing (21) connected to the main frame, a gear structure disposed in the housing (21), and a second connecting flange (22) disposed on the input shaft of the gear structure. The second connecting flange (22) is connected to the first connecting flange (13). The input shaft of the gear structure forms the input end of the gearbox (20).

8. The wind turbine unit defining arrangement according to claim 7, wherein The braking device (30) includes a brake box (31) mounted on the main frame and a brake wheel (32) rotatably mounted inside the brake box (31). The output shaft (23) of the gear structure passes through the brake box (31) and is connected to the engine of the wind turbine. The brake wheel (32) is sleeved on the output shaft (23) of the gear structure and can rotate synchronously with the output shaft (23) of the gear structure. The interior of the brake box (31) forms a storage space for storing the resistance medium. The output shaft (23) of the gear structure forms the output end of the gear box (20).

9. The wind turbine unit defining arrangement according to claim 8, wherein The braking device (30) also includes a liquid supply tank (33) connected to the brake box (31). The liquid supply tank (33) and the brake box (31) are connected by a connecting pipe (35), and a circulation pump (34) is provided on the connecting pipe (35).

10. A wind turbine generator comprising a wind wheel, a defining means and a generator, characterized in that, The limiting device is the limiting device of the wind turbine generator as described in any one of claims 1 to 9, and the limiting device is connected between the wind turbine and the generator.

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