Wind turbine and blade locking mechanism thereof

Abstract

The utility model discloses a wind generating set and blade locking mechanism thereof relates to wind power generation equipment technical field, and this blade locking mechanism includes bearing seat, brake assembly and locking assembly, bearing seat sets up in cabin, and input shaft is connected with bearing seat rotation, brake assembly includes first drive part, friction piece and brake disc, and friction piece is connected with first drive part, and brake disc fixedly covers and sets up in input shaft outside and is located the side of bearing seat away from generator, and first drive part is used for driving friction piece to remove to with brake disc friction contact or separate, locking assembly includes locking wheel, locking block and second drive part, and locking gear covers and sets up in input shaft outside, and locking wheel is personally experienced sth, such as being apart at interval to the circumference of it and is equipped with a plurality of locking grooves, and locking block personally experiences sth, such as being apart at interval to the circumference of it and is equipped with a plurality of locking grooves, and locking block personally experiences sth, such as being apart at interval to the circumference of it and is equipped with a plurality of locking grooves, and second drive part is used for driving locking block to be close to or away from locking wheel to make locking protruding stretch into or stretch out any locking groove. The blade locking mechanism locking effect and safety are better.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation equipment technology, and in particular to a wind turbine generator set and its blade locking mechanism. Background Technology

[0002] A wind turbine is a device that converts wind energy into mechanical energy through a rotor. The mechanical energy is then transmitted to the generator through a transmission chain system and finally converted into electrical energy. Since wind turbines are in operation for a long time, they need to be maintained and repaired regularly. During maintenance and repair, the rotor needs to be locked to prevent the blades and the generator's input shaft from rotating, so that the staff can carry out the maintenance work.

[0003] Currently, most impeller locking mechanisms use brake pads, which restrict the rotation of the input shaft by directly rubbing the brake pads against the generator input shaft. This not only easily wears down the input shaft, but also has a poor locking effect due to relying solely on friction. Under strong external forces, such as strong winds, the blades can easily continue to rotate, thus affecting the safety of maintenance personnel and posing a significant safety hazard. Utility Model Content

[0004] The main purpose of this utility model is to propose a wind turbine generator set and its blade locking mechanism, which aims to solve the technical problems of poor locking effect and significant safety hazards of existing locking mechanisms.

[0005] To achieve the above objectives, this utility model proposes a blade locking mechanism for a wind turbine generator set. The wind turbine generator set includes a generator, a nacelle, and an impeller. The impeller includes a hub and a plurality of blades arranged at intervals along the circumference of the hub. The generator is disposed inside the nacelle, and the input shaft of the generator passes through the nacelle and is connected to the hub located outside the nacelle. The blade locking mechanism is disposed inside the nacelle.

[0006] The blade locking mechanism includes:

[0007] A bearing housing, wherein the input shaft is rotatably connected to the bearing housing;

[0008] A braking assembly includes a first driving member, a friction member, and a brake disc. The friction member is connected to the first driving member, and the brake disc is fixedly sleeved on the outside of the input shaft and located on the side of the bearing housing opposite to the generator. The first driving member is used to drive the friction member to move so as to make frictional contact with or disengage from the brake disc.

[0009] A locking assembly includes a locking wheel, a locking block, and a second driving member. The locking wheel is sleeved on the outside of the input shaft and located on the side of the brake disc away from the bearing seat. The locking wheel has a plurality of locking grooves spaced apart along its circumference. The locking block has a locking protrusion protruding towards the locking wheel. The second driving member is used to drive the locking block to move closer to or away from the locking wheel, so that the locking protrusion extends into or out of any of the locking grooves, thereby locking or unlocking the locking wheel and the input shaft accordingly.

[0010] In one embodiment, the side of the brake disc facing the bearing housing is the braking side;

[0011] The first driving component is a driving cylinder. The driving shaft of the driving cylinder extends axially along the input shaft. The driving cylinder is located on the side of the bearing housing away from the generator, and the cylinder body of the driving cylinder is connected to the bearing housing. The friction element is connected to the driving shaft of the driving cylinder. The driving cylinder drives the friction element to move axially along the input shaft through the driving shaft, so that the friction element rubs against or disengages from the braking side.

[0012] In one embodiment, the friction element is a friction block, and there are multiple friction blocks. The number of friction blocks is the same as the number of driving cylinders and they are arranged in a one-to-one correspondence. The multiple driving cylinders are distributed at intervals along the circumference of the brake disc. Each driving cylinder is used to drive the corresponding friction block to move axially along the input shaft through its driving shaft.

[0013] In one embodiment, the friction element is a friction disc, the friction disc has a through hole for the input shaft to pass through, and there is a gap between the input shaft and the wall of the through hole;

[0014] The number of driving cylinders is multiple, and the multiple driving cylinders are distributed at intervals along the circumference of the friction disc. The multiple driving cylinders are used to jointly drive the friction block to move axially along the input shaft through their driving shafts.

[0015] In one embodiment, the side of the friction disc facing the brake disc is the friction side, and the friction side and the brake side are arranged parallel to each other; a plurality of the drive cylinders are used to jointly drive the friction element to move axially along the input shaft through their drive shafts, so that the friction side and the brake side rub against each other or disengage.

[0016] In one embodiment, a support disc is connected to the side of the friction disc opposite to the brake disc, and the drive shaft of each drive cylinder is connected to the support disc.

[0017] The support plate has multiple connecting holes that are away from the friction plate and the drive cylinder. The multiple connecting holes are distributed circumferentially along the support plate. The bearing seat has multiple support rods on the side facing the friction plate. Each support rod extends axially along the input shaft. The number of support rods is the same as the number of connecting holes and they are arranged in a one-to-one correspondence. Each support rod can slide through the corresponding connecting hole.

[0018] In one embodiment, the locking wheel is a locking gear, and the locking groove is formed between any two adjacent teeth on the outer edge of the locking gear. The locking block is disposed below the locking wheel, and the second driving member is used to drive the locking block to move up and down to approach or move away from the locking wheel.

[0019] In one embodiment, the top surface of the locking block is a downwardly concave arc-shaped top surface, and the arc-shaped top surface matches the tooth root circle contour of the locking gear. The arc-shaped top surface is provided with a plurality of locking protrusions, and the plurality of locking protrusions can respectively extend into or out of different locking grooves.

[0020] In one embodiment, the outer diameter of the locking gear is larger than the outer diameter of the brake disc, and the locking gear and the brake disc are fixedly connected.

[0021] This utility model also proposes a wind turbine generator set, which includes a generator, a nacelle, an impeller, and a blade locking mechanism as described above. The impeller includes a hub and a plurality of blades arranged at intervals along the circumference of the hub. The generator is disposed in the nacelle, and the input shaft of the generator passes through the nacelle and is connected to the hub located outside the nacelle. The blade locking mechanism is disposed in the nacelle.

[0022] This utility model discloses a blade locking mechanism for a wind turbine generator set, comprising a bearing housing, a braking assembly, and a locking assembly. The input shaft is rotatably connected to the bearing housing, and the input shaft is the shaft that transmits the rotational mechanical force of the impeller to the generator. The blades, influenced by wind force, drive the hub and the input shaft to rotate. The bearing housing supports the input shaft, ensuring stable rotation and better transmission of mechanical energy. Specifically, the bearing housing has a bearing sleeved on the input shaft, enabling mutual rotation between the input shaft and the bearing housing, thus reducing mechanical energy loss. Secondly, a braking assembly is provided, comprising a first driving component, a friction component, and a brake disc. The brake disc is sleeved on the input shaft. When the input shaft rotates, the brake disc rotates synchronously. The first driving component drives the friction component to move and rub against the brake disc, thereby reducing the speed of the brake disc and consequently reducing the speed of the input shaft, causing the rotating blades to gradually stop rotating. By incorporating a locking assembly, a locking wheel is fitted around the input shaft. The locking wheel and input shaft rotate synchronously. After the impeller stops rotating, the locking wheel also stops. A second driving component then drives a locking block to move, causing the locking protrusion on the locking block to extend into the locking groove on the locking wheel, thereby further rigidly locking the locking wheel. This ensures that the locking wheel, input shaft, and impeller are all locked, further preventing the blades from being affected by external forces and causing the input shaft to continue rotating. Therefore, this blade locking mechanism first uses the frictional force of the braking assembly to gradually brake the impeller from a rotating state to a stopped state, and then further rigidly locks the blades through the locking mechanism. This results in a better locking effect, thus ensuring the safety of maintenance personnel and improving overall safety. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a wind turbine generator set provided in an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the structure of a wind turbine generator set provided in another embodiment of this utility model;

[0026] Figure 3 This is a partial structural schematic diagram of a wind turbine generator set provided in an embodiment of the present invention.

[0027] Explanation of icon numbers:

[0028] 100. Wind turbine generator set; 1. Blade locking mechanism; 11. Bearing housing; 111. Support rod; 12. Braking assembly; 121. First drive component; 122. Friction component; 123. Brake disc; 124. Support disc; 13. Locking assembly; 131. Second drive component; 132. Locking block; 1321. Locking protrusion; 1322. Top surface; 1323. Connecting lug; 133. Locking wheel; 1331. Locking groove; 134. Support seat; 2. Generator; 21. Input shaft; 3. Nacelle; 4. Impeller; 41. Hub; 42. Blade.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] 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 scope of protection of the present utility model.

[0031] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] This utility model proposes a blade locking mechanism 1 for a wind turbine generator set 100.

[0034] Please see Figure 1In one embodiment of this utility model, the wind turbine generator set 100 includes a generator 2, a nacelle 3, and an impeller 4. The impeller 4 includes a hub 41 and a plurality of blades 42 arranged circumferentially around the hub 41. The generator 2 is disposed inside the nacelle 3. The input shaft 21 of the generator 2 passes through the nacelle 3 and is connected to the hub 41 located outside the nacelle 3. The blade locking mechanism 1 is disposed inside the nacelle 3. The blade locking mechanism 1 includes a bearing seat 11, a braking assembly 12, and a locking assembly 13. The input shaft 21 is rotatably connected to the bearing seat 11. The braking assembly 12 includes a first driving member 121, a friction member 122, and a brake disc 123. The friction member 122 is connected to the first driving member 121. The brake disc 123 is fixedly sleeved outside the input shaft 21 and located in the bearing seat. 11 is located on the side opposite to the generator 2; the first driving member 121 is used to drive the friction member 122 to move so as to rub against or disengage from the brake disc 123; the locking assembly 13 includes a locking wheel 133, a locking block 132 and a second driving member 131. The locking wheel 133 is sleeved on the outside of the input shaft 21 and located on the side of the brake disc 123 opposite to the bearing seat 11. The locking wheel 133 is provided with a plurality of locking grooves 1331 spaced apart along its circumference. The locking block 132 is provided with a locking protrusion 1321 protruding towards the locking wheel 133. The second driving member 131 is used to drive the locking block 132 to approach or move away from the locking wheel 133 so that the locking protrusion 1321 extends into or out of any locking groove 1331, so as to lock or unlock the locking wheel 133 and the input shaft 21 accordingly.

[0035] The blade locking mechanism 1 of the wind turbine generator set 100 of this utility model includes a bearing housing 11, a braking assembly 12, and a locking assembly 13. The input shaft 21 is rotatably connected to the bearing housing 11. The input shaft 21 is also the shaft that transmits the rotational mechanical force of the impeller 4 to the generator 2. The blade 42 is affected by the wind force, which drives the hub 41 and the input shaft 21 to rotate. The bearing housing 11 can be used to support the input shaft 21 and ensure that the input shaft 21 rotates stably to better transmit mechanical energy. It can be understood that the bearing housing 11 is provided with a bearing sleeved on the input shaft 21. The bearing enables mutual rotation between the input shaft 21 and the bearing housing 11 and reduces the loss of mechanical energy. Secondly, by setting a braking assembly 12, which includes a first driving member 121, a friction member 122, and a brake disc 123, the brake disc 123 is sleeved outside the input shaft 21. When the input shaft 21 rotates, the brake disc 123 also rotates synchronously. The first driving member 121 drives the friction member 122 to move and make frictional contact with the brake disc 123, thereby reducing the rotational speed of the brake disc 123, which in turn reduces the rotational speed of the input shaft 21, so that the rotating blade 42 gradually stops rotating. The locking assembly 13 is used, in which a locking wheel 133 is sleeved on the outside of the input shaft 21. The locking wheel 133 and the input shaft 21 rotate synchronously. After the impeller 4 stops rotating, the locking wheel 133 also stops rotating. The second driving member 131 drives the locking block 132 to move, so that the locking protrusion 1321 on the locking block 132 extends into the locking groove 1331 on the locking wheel 133, thereby further rigidly locking the locking wheel 133. This ensures that the locking wheel 133, the input shaft 21, and the impeller 4 are all locked, further preventing the blade 42 from being affected by external forces and causing the input shaft 21 to continue rotating. It can be seen that this blade locking mechanism 1 first uses the friction of the braking assembly 12 to gradually brake the impeller 4 from a rotating state to a stopped state, and then uses the locking mechanism to further rigidly lock the blade 42. The locking effect is better, thus ensuring the safety of maintenance personnel and improving safety.

[0036] Furthermore, since the input shaft 21 is not directly worn due to friction between the friction element 122 and the brake disc 123, both the friction element 122 and the brake disc 123 can be replaced and repaired separately after wear.

[0037] In one embodiment, the side of the brake disc 123 facing the bearing housing 11 is the braking side; the first driving member 121 is a driving cylinder, the driving shaft of the driving cylinder extends axially along the input shaft 21, the driving cylinder is located on the side of the bearing housing 11 away from the generator 2, and the cylinder body of the driving cylinder is connected to the bearing housing 11, the friction member 122 is connected to the driving shaft of the driving cylinder, and the driving cylinder drives the friction member 122 to move axially along the input shaft 21 through the driving shaft, so that the friction member 122 rubs against or disengages from the braking side.

[0038] Understandably, the first driving component 121 is a driving cylinder. The driving cylinder is arranged axially along the input shaft 21 and directly connected between the bearing housing 11 and the friction component 122. The thrust generated by the cylinder can act on the friction component 122 along the shortest path and most directly, pushing it to contact the braking side of the brake disc 123. This reduces the force transmission links and direction conversion, effectively reduces energy loss, makes the braking response faster and the action more precise, and improves braking efficiency.

[0039] Furthermore, the drive cylinder, friction element 122, and brake disc 123 are distributed along the axial direction of the input shaft 21, reducing the additional space required for radial arrangement and making the overall structure of the wind turbine generator set 100 more compact.

[0040] In one embodiment, the friction element 122 is a friction disk, which has a through hole through which the input shaft 21 passes, and there is a gap between the input shaft 21 and the wall of the through hole; there are multiple driving cylinders, and the multiple driving cylinders are distributed at intervals along the circumference of the friction disk, and the multiple driving cylinders are used to jointly drive the friction block to move axially along the input shaft 21 through their driving shafts.

[0041] The friction element 122 is a friction disc, which makes frictional contact with the brake disc 123, resulting in the largest frictional contact area between the two. Furthermore, under the push of multiple circumferentially distributed drive cylinders, the pressure can be applied more evenly to the entire braking side of the brake disc 123, resulting in better friction braking effect. In addition, the through hole on the friction disc maintains a gap with the input shaft 21, ensuring that the friction disc does not directly contact the high-speed rotating input shaft 21 and preventing the friction disc from rotating.

[0042] Please see Figure 2 In another embodiment, the friction element 122 is a friction block, and there are multiple friction blocks. The number of friction blocks is the same as the number of driving cylinders and they are arranged in a one-to-one correspondence. Multiple driving cylinders are distributed at intervals along the circumference of the brake disc 123. Each driving cylinder is used to drive the corresponding friction block to move axially along the input shaft 21 through its driving shaft.

[0043] Friction component 122 is a friction block. Multiple friction blocks are evenly distributed along the circumference of brake disc 123. Under the action of each drive cylinder, each friction block makes frictional contact with the brake side of brake disc 123 from multiple positions. The force distribution is uniform, the braking process is more stable and reliable, and the total friction area is significantly increased, resulting in better braking effect. Individual friction blocks are also easy to replace after wear, saving maintenance costs.

[0044] Please continue reading. Figure 1Furthermore, the side of the friction disc facing the brake disc 123 is the friction side, and the friction side and the brake side are arranged parallel to each other. Multiple drive cylinders are used to jointly drive the friction element 122 to move axially along the input shaft 21 through their drive shafts, so that the friction side and the brake side can make frictional contact or disengage. The parallel arrangement ensures that the friction side and the brake side of the brake disc 123 can make parallel contact to maximize the contact area, make the friction force greater, and quickly achieve impeller 4 braking.

[0045] In one embodiment, a support plate 124 is connected to the side of the friction disc away from the brake disc 123, and the drive shaft of each drive cylinder is connected to the support plate 124. Multiple connection holes are provided on the support plate 124 away from the friction disc and the drive cylinder. The multiple connection holes are distributed circumferentially along the support plate 124. Multiple support rods 111 are provided on the side of the bearing seat 11 facing the friction disc. Each support rod 111 extends axially along the input shaft 21. The number of support rods 111 is the same as the number of connection holes and they are arranged one-to-one. Each support rod 111 is slidably inserted into the corresponding connection hole.

[0046] Understandably, the sliding engagement of multiple support rods 111 with the connecting holes provides precise axial guidance for the support disc 124 when it is driven by the drive cylinder. When the drive cylinder pushes the support disc 124, the support rods 111 slide within the connecting holes, forcibly constraining the movement path of the friction disc and ensuring that the friction disc can only move linearly along the axial direction of the input shaft 21, avoiding any directional deviation or tilting. At the same time, it can also prevent the friction disc from rotating, thereby effectively stabilizing and supporting the friction disc during the friction process between the friction disc and the brake disc 123, ensuring the reliability of friction braking.

[0047] Please combine Figure 1 and Figure 3 In one embodiment, the locking wheel 133 is a locking gear, and a locking groove 1331 is formed between any two adjacent teeth on the outer edge of the locking gear. The locking block 132 is disposed below the locking wheel 133. The second driving member 131 is used to drive the locking block 132 to move up and down to approach or move away from the locking wheel 133.

[0048] The locking wheel 133 is a locking gear. A locking groove 1331 is formed between two adjacent teeth of the locking gear. The teeth of the gear are continuously distributed along the circumference and at equal intervals. That is, the number of locking grooves 1331 is equal to the number of teeth and the distribution is also uniform. When the locking gear rotates at any angle, there is a locking groove 1331 that corresponds to the position of the locking protrusion 1321, so that the locking protrusion 1321 can extend into one of the locking grooves 1331, thereby locking the locking gear and preventing it from continuing to rotate.

[0049] Furthermore, connecting ears 1323 are provided on opposite sides of the locking block 132, and support seats 134 are provided in the cabin 3 corresponding to the positions of each connecting ear 1323. Each support seat 134 includes a connecting plate located on top of the connecting ear 1323. There are two second driving components 131, and the two second driving components 131 are provided one-to-one with the two connecting plates. The second driving component 131 is a vertically arranged lifting cylinder, one end of which is connected to the connecting plate, and the other end of which is connected to the connecting ear 1323.

[0050] Understandably, by using two lifting cylinders to drive the two connecting ears 1323 to rise and fall, the entire locking block 132 is driven to rise and fall vertically, thereby extending the locking protrusion 1321 into the locking groove 1331 to lock the locking gear.

[0051] In another embodiment, a locking groove 1331 is provided on the side of the locking wheel 133, and the second driving member 131 drives the locking block 132 to move axially so that the locking protrusion 1321 extends into the locking groove 1331.

[0052] Furthermore, the top surface 1322 of the locking block 132 is a downwardly recessed arc-shaped top surface 1322, and the arc-shaped top surface 1322 matches the tooth root circle contour of the locking gear. The arc-shaped top surface 1322 is provided with multiple locking protrusions 1321, and the multiple locking protrusions 1321 can extend into or out of different locking grooves 1331 respectively.

[0053] Understandably, the top surface 1322 of the locking block 132 is an arc-shaped top surface 1322 and is provided with multiple locking protrusions 1321. When the locking block 132 is lifted to the position of meshing with the locking gear, the multiple locking protrusions 1321 can be simultaneously inserted into the multiple locking grooves 1331 on the outer edge of the locking gear, which greatly improves the overall torsional resistance and locking effect, and the locking reliability is better.

[0054] In one embodiment, the outer diameter of the locking gear is larger than the outer diameter of the brake disc 123, and the locking gear and the brake disc 123 are fixedly connected. Understandably, a larger outer diameter of the locking gear is equivalent to increasing the lever arm, reducing the load on the locking protrusion 1321. The fixed connection between the locking gear and the brake disc 123 enhances structural stability and reduces the axial space occupied by the locking gear and brake disc 123 on the input shaft 21, making the mechanism more compact.

[0055] Specifically, the locking gear and the brake disc 123 are fixed together by bolts.

[0056] This utility model also proposes a wind turbine generator set 100, which includes a generator 2, a nacelle 3, an impeller 4, and a blade locking mechanism 1 as described above. The impeller 4 includes a hub 41 and a plurality of blades 42 arranged circumferentially around the hub 41. The generator 2 is disposed inside the nacelle 3, and the input shaft 21 of the generator 2 passes through the nacelle 3 and is connected to the hub 41 located outside the nacelle 3. The blade locking mechanism 1 is disposed inside the nacelle 3. The specific structure of the blade locking mechanism 1 of the wind turbine generator set 100 is as described in the above embodiments. Since this wind turbine generator set 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0057] The above are merely exemplary embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the technical concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A blade locking mechanism for a wind turbine generator set, characterized in that, The wind turbine generator set includes a generator, a nacelle, and a rotor. The rotor includes a hub and multiple blades arranged circumferentially around the hub. The generator is located inside the nacelle. The input shaft of the generator passes through the nacelle and is connected to the hub located outside the nacelle. The blade locking mechanism is located inside the nacelle. The blade locking mechanism includes: A bearing housing, wherein the input shaft is rotatably connected to the bearing housing; A braking assembly includes a first driving member, a friction member, and a brake disc. The friction member is connected to the first driving member, and the brake disc is fixedly sleeved on the outside of the input shaft and located on the side of the bearing housing opposite to the generator. The first driving member is used to drive the friction member to move so as to make frictional contact with or disengage from the brake disc. A locking assembly includes a locking wheel, a locking block, and a second driving member. The locking wheel is sleeved on the outside of the input shaft and located on the side of the brake disc away from the bearing seat. The locking wheel has a plurality of locking grooves spaced apart along its circumference. The locking block has a locking protrusion protruding towards the locking wheel. The second driving member is used to drive the locking block to move closer to or away from the locking wheel, so that the locking protrusion extends into or out of any of the locking grooves, thereby locking or unlocking the locking wheel and the input shaft accordingly.

2. The blade locking mechanism of the wind turbine generator set as described in claim 1, characterized in that, The side of the brake disc facing the bearing housing is the braking side; The first driving component is a driving cylinder. The driving shaft of the driving cylinder extends axially along the input shaft. The driving cylinder is located on the side of the bearing housing away from the generator, and the cylinder body of the driving cylinder is connected to the bearing housing. The friction element is connected to the driving shaft of the driving cylinder. The driving cylinder drives the friction element to move axially along the input shaft through the driving shaft, so that the friction element rubs against or disengages from the braking side.

3. The blade locking mechanism of the wind turbine generator set as described in claim 2, characterized in that, The friction element is a friction block, and there are multiple friction blocks. The number of friction blocks is the same as the number of driving cylinders and they are arranged in a one-to-one correspondence. The multiple driving cylinders are distributed at intervals along the circumference of the brake disc. Each driving cylinder is used to drive the corresponding friction block to move axially along the input shaft through its driving shaft.

4. The blade locking mechanism of the wind turbine generator set as described in claim 3, characterized in that, The friction element is a friction disc, which has a through hole for the input shaft to pass through, and there is a gap between the input shaft and the wall of the through hole; The number of driving cylinders is multiple, and the multiple driving cylinders are distributed at intervals along the circumference of the friction disc. The multiple driving cylinders are used to jointly drive the friction block to move axially along the input shaft through their driving shafts.

5. The blade locking mechanism of the wind turbine generator set as described in claim 4, characterized in that, The side of the friction disc facing the brake disc is the friction side, and the friction side and the brake side are arranged parallel to each other; a plurality of the drive cylinders are used to jointly drive the friction element to move axially along the input shaft through their drive shafts, so that the friction side and the brake side rub against each other or disengage.

6. The blade locking mechanism of the wind turbine generator set as described in claim 4, characterized in that, The friction disc is connected to a support disc on the side opposite to the brake disc, and the drive shaft of each drive cylinder is connected to the support disc. The support plate has multiple connecting holes that are away from the friction plate and the drive cylinder. The multiple connecting holes are distributed circumferentially along the support plate. The bearing seat has multiple support rods on the side facing the friction plate. Each support rod extends axially along the input shaft. The number of support rods is the same as the number of connecting holes and they are arranged in a one-to-one correspondence. Each support rod can slide through the corresponding connecting hole.

7. The blade locking mechanism of the wind turbine generator set as described in any one of claims 1 to 6, characterized in that, The locking wheel is a locking gear, and the locking groove is formed between any two adjacent teeth on the outer edge of the locking gear. The locking block is disposed below the locking wheel, and the second driving member is used to drive the locking block to move up and down to approach or move away from the locking wheel.

8. The blade locking mechanism of the wind turbine generator set as described in claim 7, characterized in that, The top surface of the locking block is a downwardly concave arc-shaped top surface, and the arc-shaped top surface matches the tooth root circle contour of the locking gear. The arc-shaped top surface is provided with multiple locking protrusions, and the multiple locking protrusions can extend into or out of different locking grooves respectively.

9. The blade locking mechanism of the wind turbine generator set as described in claim 7, characterized in that, The outer diameter of the locking gear is larger than the outer diameter of the brake disc, and the locking gear and the brake disc are fixedly connected.

10. A wind turbine generator set, characterized in that, The wind turbine generator set includes a generator, a nacelle, an impeller, and a blade locking mechanism as described in any one of claims 1 to 9. The impeller includes a hub and a plurality of blades arranged circumferentially around the hub. The generator is disposed within the nacelle. The input shaft of the generator passes through the nacelle and is connected to the hub located outside the nacelle. The blade locking mechanism is disposed within the nacelle.

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