Wind turbine generator set and blade locking device

Abstract

The present invention relates to a blade locking device and a wind turbine generator set. The blade locking device is arranged on the wind turbine generator set and comprises: a base; a driving mechanism arranged on the base; and a locking mechanism connected to the output end of the driving mechanism; the locking mechanism moves back and forth between a locking position that blocks the rotation of the blade and an unlocking position that allows the rotation of the blade under the drive of the driving mechanism. In the above-mentioned blade locking device, the blade locking device can be assembled to the fixing ring of the variable pitch bearing through the base, and the locking mechanism can be moved to the locking position under the drive of the driving mechanism to block the rotation of the blade and realize the braking of the blade. When extreme conditions such as typhoons occur, the blade locking device can be used to brake the blades in the wind turbine generator set, rather than using a variable pitch device for braking like in a traditional wind turbine generator set, that is, in extreme conditions, there is no need to brake through the variable pitch device, so as to protect the variable pitch device and prevent the variable pitch device from failing and causing safety hazards.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a wind power generator set and a blade locking device. Background Art

[0002] With the increasing pressure on energy and environment, clean and renewable new energy has received widespread attention in recent years. Among all kinds of green energy, wind energy is one of the renewable energy sources with great potential. It is clean, low-cost and inexhaustible. Wind power generation has the advantages of large installed capacity growth space, rapid cost reduction, safety, and inexhaustible energy. Moreover, wind power generation technology is relatively mature, and has the most conditions for large-scale commercial development and relatively low cost. The use of wind power generation has received increasing attention and has shown broad growth space. China is rich in wind energy, and the wind power equipment manufacturing industry has a broad market space and bright prospects.

[0003] Generally, wind turbines use wind power to drive blades to rotate, and then use a speed increaser to increase the speed of rotation to enable the generator to generate electricity. In addition, in emergency situations such as typhoons, the blades need to be braked to prevent the wind turbine from being damaged. However, in traditional variable-pitch wind turbines, braking is performed through a variable pitch mechanism. When the blades are subjected to a large moment of inertia, the variable pitch mechanism may fail, thereby affecting the safety performance of the wind turbine. Summary of the invention

[0004] Based on this, it is necessary to provide a blade braking device to provide effective braking while preventing the failure of the pitch mechanism in the wind turbine generator set.

[0005] A blade locking device is provided in a wind turbine generator set and comprises:

[0006] Base;

[0007] A driving mechanism is disposed on the base; and

[0008] A locking mechanism connected to the output end of the driving mechanism;

[0009] Wherein, driven by the driving mechanism, the locking mechanism reciprocates between a locking position that blocks the blade from rotating and an unlocking position that allows the blade to rotate.

[0010] The blade locking device includes a base, a driving mechanism and a locking mechanism. The driving mechanism is arranged on the base. The locking mechanism, driven by the driving mechanism, reciprocates between a locking position that blocks the rotation of the blade and an unlocking position that allows the rotation of the blade. The blade locking device can be assembled to the fixed ring of the pitch bearing through the base, and the locking mechanism can be moved to the locking position driven by the driving mechanism to block the rotation of the blade and achieve braking of the blade. When extreme conditions such as typhoons occur, the blade locking device can be used to brake the blades in the wind turbine generator set, rather than using a pitch device for braking as in traditional wind turbine generator sets. That is, in extreme cases, there is no need to brake through the pitch device, so as to protect the pitch device and prevent the pitch device from failing and causing safety hazards.

[0011] In some embodiments, the locking mechanism includes a sliding assembly and a locking piece. The sliding assembly is transmission-connected to the driving mechanism and is lifted and lowered relative to the base under the action of the driving mechanism. The locking piece is fixed to the sliding assembly and extends into or out of the locking gap between two adjacent connecting bolts on the blade under the drive of the sliding assembly, and the connecting bolts connect the blade and the rotating ring of the pitch bearing.

[0012] In some of the embodiments, the base is used to mate with a fixing ring of a pitch bearing, and a through hole is provided on the base to allow the locking member to pass through and extend into the locking gap.

[0013] In some embodiments, a guide post is further included, wherein the guide post is fixed to the base, and the sliding component is sleeved outside the guide post and can be slidably arranged along the guide post.

[0014] In some of the embodiments, a controller and a sensor are further included. The sensor is arranged on the base and is used to detect whether the locking gap is located on the moving path of the locking member. The controller controls the driving mechanism to start when the locking gap is located on the moving path of the locking member.

[0015] In some embodiments, the connecting bolts include a plurality of connecting bolts evenly spaced apart along the circumference of the rotating circle, and the sensor includes a first sub-sensor and a second sub-sensor spaced apart along the circumference of the rotating circle parallel to the rotating circle;

[0016] When the first sub-sensor detects that one of the plurality of connecting bolts reaches a first relative position and the second sub-sensor detects that another of the plurality of connecting bolts reaches a second relative position, the locking gap rotates to a moving path of the locking member.

[0017] In some embodiments, it also includes a baffle, a first travel switch and a second travel switch, the baffle is connected to the sliding assembly and moves back and forth synchronously with the sliding assembly, the first travel switch and the second travel switch are arranged on the base at intervals and are respectively located at relative first limit positions and second limit positions, and the controller controls the driving mechanism to stop when the baffle passes the first travel switch and the second travel switch.

[0018] In some embodiments, the driving mechanism includes a driving member, a brake assembly and a transmission shaft, the brake assembly is connected between the driving member and the transmission shaft, and the brake assembly has a linkage state that allows the transmission shaft and the output end of the driving member to move synchronously, and a braking state that prevents the transmission shaft and the output end of the driving member from moving;

[0019] Furthermore, the locking mechanism is connected to the transmission shaft and can move back and forth driven by the moving transmission shaft.

[0020] In some embodiments, the brake assembly includes a sleeve and a brake member, wherein the drive member output end and the transmission shaft are respectively sleeved at opposite ends of the sleeve, and the brake member is sleeved on the transmission shaft and can selectively lock or release the transmission shaft.

[0021] A wind turbine generator set includes a pitch bearing, a blade and the above-mentioned blade locking device, wherein the blade is connected to the movable ring of the pitch bearing by a plurality of spaced connecting bolts, and the blade locking device is arranged on the fixed ring of the pitch bearing and can abut against the connecting bolts along the rotation direction of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a blade locking device from one perspective in one embodiment of the present invention;

[0023] Figure 2 for Figure 1 A schematic structural diagram of the blade locking device from another perspective;

[0024] Figure 3 for Figure 1 A schematic diagram of the structure of the driving mechanism in the blade locking device shown.

[0025] 210, blade; 211, locking gap; 212, connecting bolt; 230, fixing ring; 100, blade locking device; 10, base; 11, through hole; 12, pressure plate; 14, connecting frame; 30, driving mechanism; 32, driving member; 34, transmission shaft; 36, brake assembly; 361, housing; 362, bushing; 364, brake member; 365, bearing; 366, bearing seat; 367, brake cover; 50, locking mechanism; 52, sliding assembly; 521, slider; 523, connecting member; 525, transmission plate; 54, locking member; 56, guide column; 72, first sub-sensor; 74, second sub-sensor; 90, baffle; 92, first travel switch; 94, second travel switch. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0032] See also Figure 1 and Figure 2 In one embodiment of the present invention, a wind turbine generator set is provided. The wind turbine generator set uses wind power to drive blades 210 to rotate, and then increases the rotation speed through a speed increaser to drive the generator to generate electricity.

[0033] Specifically, the wind turbine generator set includes a tower, a pitch device, a hub, a blade 210 and a generator, wherein the generator and the hub are arranged on the tower, and the blade 210 is mounted on the hub and rotatably arranged relative to the tower to drive the rotor of the generator to rotate and generate electricity. The pitch device includes a pitch drive mechanism and a pitch bearing 365, wherein the pitch bearing 365 is mounted on the hub, and the blade 210 and the movable ring of the pitch bearing 365 are connected by a connecting bolt 212, and the pitch drive mechanism is connected to the movable ring in a transmission manner to drive the movable ring to rotate, thereby realizing the function of adjusting the position of the blade 210.

[0034] In some embodiments, the wind turbine generator set further includes a blade locking device 100, wherein the blade 210 is connected to the movable ring of the pitch bearing 365 by a plurality of spaced connecting bolts 212, and the blade locking device 100 is disposed on the fixed ring 230 of the pitch bearing 365, and can abut against the connecting bolts 212 along the rotation direction of the blade 210, thereby preventing the blade 210 from rotating, so as to provide effective braking for the blade 210, and at the same time will not affect the pitch drive mechanism, prevent damage to the pitch device, and prevent safety problems of the wind turbine generator set. Among them, the movable ring of the pitch bearing 365 can be an inner ring, and the fixed ring 230 of the pitch bearing 365 can be an outer ring; or, the movable ring of the pitch bearing 365 is an outer ring, and the fixed ring 230 of the pitch bearing 365 is an inner ring, and the relative rotation of the movable ring and the fixed ring 230 can be achieved.

[0035] The blade locking device 100 includes a base 10, a driving mechanism 30 and a locking mechanism 50. The driving mechanism 30 is arranged on the base 10. The locking mechanism 50, driven by the driving mechanism 30, reciprocates between a locking position that blocks the rotation of the blade 210 and an unlocking position that allows the rotation of the blade 210. The blade locking device 100 can be assembled to the fixing ring 230 of the pitch bearing 365 through the base 10, and the locking mechanism 50 can be moved to the locking position driven by the driving mechanism 30 to block the rotation of the blade 210 and achieve braking of the blade 210. When extreme conditions such as typhoons occur, the blade locking device 100 can be used to brake the blade 210 in the wind turbine generator set, rather than using a pitch device for braking as in a traditional wind turbine generator set, that is, in extreme conditions, it is not necessary to brake through the pitch device, so as to protect the pitch device and prevent the pitch device from failing and causing safety hazards.

[0036] The base 10 includes a pressing plate 12 and a connecting frame 14. The pressing plate 12 is assembled on the fixing ring 230 of the pitch bearing 365. The connecting frame 14 includes a first connecting portion and a second connecting portion that are intersecting and connected. One of the first connecting portion and the second connecting portion is connected to the pressing plate 12. The other of the first connecting portion and the second connecting portion is equipped with a driving mechanism 30. The locking mechanism 50 is lifted and lowered relative to the pressing plate 12 under the drive of the driving mechanism 30 to extend into or withdraw from the rotation path of the connecting bolt 212 on the blade 210, thereby blocking or allowing the blade 210 to rotate. In this way, the driving mechanism 30 and the locking mechanism 50 are assembled through the base 10.

[0037] See also Figure 1 and Figure 3The driving mechanism 30 includes a driving member 32 and a transmission shaft 34. The transmission shaft 34 is transmission-connected between the driving member 32 and the locking mechanism 50. The transmission shaft 34 can convert the motion output by the driving member 32 into the reciprocating movement of the locking mechanism 50, thereby realizing the function of locking and unlocking the blade 210. Optionally, the transmission shaft 34 is threadedly connected to the locking mechanism 50, and the driving member 32 is a motor. The driving member 32 can drive the transmission shaft 34 to rotate, thereby driving the locking mechanism 50 to reciprocate along the axial direction of the transmission shaft 34. It can be understood that the reciprocating movement of the locking mechanism 50 can also be achieved by other driving methods, which are not limited here.

[0038] In some embodiments, the driving mechanism 30 further includes a brake assembly 36, which is connected between the driving member 32 and the transmission shaft 34. The brake assembly 36 has a linkage state that allows the transmission shaft 34 and the output end of the driving member 32 to operate synchronously, and a braking state that prevents the transmission shaft 34 and the output end of the driving member 32 from moving. In this way, the brake assembly 36 is provided at the output end of the driving member 32, and the brake assembly 36 can apply a braking force to the transmission shaft 34. When the locking mechanism 50 connected to the transmission shaft 34 is subjected to a large external force (for example, when a typhoon occurs and the blade 210 is subjected to a large moment of inertia, the blade 210 transmits a large external force to the locking mechanism 50), the transmission shaft 34 fixed by the brake assembly 36 will continue to remain in the original position, thereby allowing the locking mechanism 50 to continue to remain in the locked position to provide effective locking, thereby preventing the blade 210 from accidentally rotating when subjected to a large moment of inertia. At the same time, the transmission shaft 34 is fixed by the brake assembly 36 , so that the transmission shaft 34 will not directly transmit the external torque to the driving member 32 , thereby protecting the driving member 32 and further protecting the blade locking device 100 .

[0039] Further, the brake assembly 36 includes a sleeve 362 and a brake member 364. The output end of the drive member 32 and the transmission shaft 34 are respectively sleeved at opposite ends of the sleeve 362. The brake member 364 is sleeved on the transmission shaft 34 and can selectively lock or release the transmission shaft 34. The output end of the drive member 32 and the transmission shaft 34 are connected through the sleeve 362, and the brake member 364 is disposed outside the transmission shaft 34 to lock or release the transmission shaft 34 through the brake member 364. For example, when the locking mechanism 50 needs to lock the blade 210, the brake member 364 releases the transmission shaft 34, drives the transmission shaft 34 to move through the drive member 32, and then drives the locking mechanism 50 to move from the unlocking position to the locking position; when the locking mechanism 50 moves to the locking position, the drive member 32 stops, and the locking member locks the transmission shaft 34, and applies a locking force to the transmission shaft 34 to fix the transmission shaft 34. In this way, when the impeller is subjected to a large moment of inertia, the transmission shaft 34 fixed by the locking member 54 will not continue to transmit the moment of inertia to the driving member 32, thereby preventing the driving member 32 from being damaged by a large load and protecting the driving member 32 and the blade locking device 100.

[0040] In some embodiments, the brake assembly 36 further includes a housing 361, a sleeve 362 is disposed in the housing 361, a portion of the transmission shaft 34 extends into the housing 361, and opposite ends of the sleeve 362 are respectively sleeved with an output end of the driver 32 and one end of the transmission shaft 34 extending into the housing 361. In this way, the sleeve 362 is accommodated and protected by the housing 361, and the housing 361 allows one end of the transmission shaft 34 to extend into and mate with the sleeve 362, thereby realizing a transmission connection between the transmission shaft 34 and the output end of the driver 32.

[0041] Specifically, the brake member 364 releases the transmission shaft 34 when it is powered on, and locks the transmission shaft 34 when it is powered off, so that the transmission shaft 34 can be selectively locked or released by controlling the power on and off of the brake member 364. Optionally, the brake member 364 is a power-off electromagnetic brake.

[0042] Furthermore, the driving mechanism 30 further includes a bearing 365, which is mounted on the inner wall of the housing 361 and sleeved outside the shaft sleeve 362. When the output shaft of the driving member 32 rotates, the shaft sleeve 362 is driven to rotate, thereby driving the transmission shaft 34 at the other end of the shaft sleeve 362 to rotate. At the same time, the shaft sleeve 362 is supported by the bearing 365, and the shaft sleeve 362 can rotate flexibly. Optionally, the output end of the driving member 32 and the transmission shaft 34 are coaxially arranged to ensure the accuracy of the transmission.

[0043] Furthermore, the housing 361 includes a bearing seat 366 and a brake cover 367, and the bearing 365 is matched on the bearing seat 366 so that the bearing 365 is assembled through the bearing seat 366; the brake cover 367 is connected to the bearing seat 366 and is arranged outside the stop member, the bearing seat 366 serves as an installation base for the stop cover, and the internal brake member 364 is protected by the brake cover 367.

[0044] Optionally, the brake member 364 is matched to the side of the bearing seat 366 facing the brake cover 367, and the brake member 364 is supported by the bearing seat 366, so that the brake member 364 can be controlled to contact or separate from the transmission shaft 34 without being supported by the transmission shaft 34, so as to effectively brake the transmission shaft 34.

[0045] The locking mechanism 50 includes a sliding assembly 52 and a locking member 54. The sliding assembly 52 is connected to the driving mechanism 30 by transmission, and is lifted and lowered relative to the base 10 under the action of the driving mechanism 30. Specifically, the sliding assembly 52 is threadedly connected to the transmission member in the driving mechanism 30, and the sliding assembly 52 is driven to lift and lower when the transmission member rotates. The locking member 54 is fixed to the sliding assembly 52, and extends into or out of the locking gap 211 between two adjacent bolts on the blade 210 under the drive of the sliding assembly 52, wherein the connecting bolt 212 connects the blade 210 and the rotating circle of the pitch bearing 365. In other words, the blade 210 is matched to the rotating circle of the pitch bearing 365 by a plurality of spaced connecting bolts 212, so as to realize the connection between the blade 210 and the pitch device. In addition, the space between two adjacent connecting bolts 212 is used as the locking gap 211, and the locking of the blade 210 can be realized by the cooperation of the locking member 54 and the locking gap 211. Specifically, when the sliding assembly 52 moves back and forth relative to the base 10 driven by the transmission shaft 34 , the locking member 54 is driven to rise and fall back and forth relative to the base 10 , and then extends into or exits the locking gap 211 , thereby realizing the locking and unlocking functions of the blade 210 .

[0046] Optionally, the base 10 is provided with a through hole 11 that allows the locking member 54 to pass through and extend into the locking gap 211. The locking member 54 can pass through the base 10 and extend into the locking gap 211 at the bottom of the base 10 to lock the blade 210. Specifically, the pressure plate 12 in the base 10 is provided with the through hole 11.

[0047] Furthermore, the slider 521 assembly includes a slider 521, a connecting member 523 and a transmission plate 525. The slider 521 is transmission-connected to the transmission shaft 34, and is raised and lowered relative to the pressure plate 12 under the drive of the transmission shaft 34. The connecting member 523 is connected between the slider 521 and the transmission plate 525, and the transmission plate 525 is connected to the slider 521. The locking member 54 is fixedly assembled on the transmission plate 525 to provide an installation basis for the locking member 54.

[0048] In some embodiments, the blade locking device 100 further includes a guide post 56, which is fixed to the base 10, and the sliding assembly 52 is sleeved on the guide post 56 and slidably arranged along the guide post 56, so as to guide the sliding assembly 52 to move up and down relative to the base 10 through the guide post 56. Specifically, a through hole is provided on the transmission plate 525, and a linear bearing 365 is installed in the through hole. The guide post 56 is sleeved in the linear bearing 365, and when the transmission shaft 34 rotates, the slider 521 is driven to move back and forth, and then the transmission plate 525 is driven to move back and forth along the guide post 56, and the transmission plate 525 slides in contact with the guide post 56 through the linear bearing 365, so as to ensure smooth sliding.

[0049] In some embodiments, the blade locking device 100 also includes a controller and a sensor, wherein the sensor is used to detect whether the locking gap 211 is located on the moving path of the locking member 54. When the locking gap 211 is located on the moving path of the locking member 54, the controller controls the driving mechanism 30 to open, thereby allowing the locking member 54 to be inserted into the locking gap 211 under the action of the driving mechanism 30, thereby preventing the locking member 54 from being misaligned with the locking gap 211 and failing to effectively block the blade 210.

[0050] Specifically, the connecting bolts 212 include a plurality of connecting bolts 212 evenly spaced apart along the circumference of the rotating circle, and the sensor includes a first sub-sensor 72 and a second sub-sensor 74 spaced apart along the circumference of the rotating circle in parallel; wherein, when the first sub-sensor 72 detects that one of the plurality of connecting bolts 212 reaches the first relative position, and the second sub-sensor 74 detects that another of the plurality of connecting bolts 212 reaches the second relative position, the locking gap 211 rotates to the moving path of the locking member 54, and the controller can control the driving mechanism 30 to open to drive the locking member 54 to be accurately inserted into the locking gap 211.

[0051] Among them, the first sub-sensor 72 and the second sub-sensor 74 are arranged at intervals on the base 10 along the direction parallel to the circumference of the rotating circle. When the first sub-sensor 72 and the second sub-sensor 74 reach the first relative position and the second relative position respectively, it is determined that the locking gap 211 rotates to the moving path of the locking member 54, thereby improving the detection accuracy. Specifically, the first relative position and the second relative position can be set according to actual conditions. For example, along the direction of rotation of the blade 210, each connecting bolt 212 has a relative head and tail. During the rotation of the blade 210, the head and tail of each connecting bolt 212 pass through the first sub-sensor 72 and the second sub-sensor 74 in sequence. When the first sub-sensor 72 detects the tail of one of the multiple connecting bolts 212 and the second sub-sensor 74 detects the head of another one of the multiple connecting bolts 212, the locking member 54 is just located above the locking gap 211, and the through hole 11 on the bottom plate is aligned with the locking gap 211. The locking member 54 can pass through the through hole 11 and be inserted into the locking gap 211 to lock the blade 210.

[0052] In some embodiments, the blade locking device 100 further includes a baffle 90, a first travel switch 92, and a second travel switch 94. The baffle 90 is coupled to the sliding assembly 52 and reciprocates synchronously with the sliding assembly 52. ​​Specifically, the baffle 90 is coupled to the slider 521. The first travel switch 92 and the second travel switch 94 are arranged on the base 10 at intervals and are respectively located at the first limit position and the second limit position relative to each other. The controller controls the driving machine to stop when the baffle 90 passes through the first travel switch 92 and the second travel switch 94. In this way, the moving stroke of the sliding assembly 52 is limited by the first travel switch 92 and the second travel switch 94, so as to prevent the sliding assembly 52 from moving too high or too low relative to the base 10.

[0053] In one embodiment of the present invention, a blade locking device 100 is also provided, which can provide effective locking for the blade 210 and prevent the pitch device from being damaged, thereby improving the safety performance of the wind turbine generator set.

[0054] In one embodiment of the present invention, there is also provided a driving mechanism 30, which includes a driving member 32, a transmission shaft 34 and a brake assembly 36. The brake assembly 36 is connected between the driving member 32 and the transmission shaft 34. The brake assembly 36 has a linkage state that allows the transmission shaft 34 and the output end of the driving member 32 to operate synchronously, and a braking state that prevents the transmission shaft 34 and the output end of the driving member 32 from moving. In this way, the brake assembly 36 is arranged at the output end of the driving member 32, and the brake assembly 36 can apply a braking force to the transmission shaft 34. When the locking mechanism 50 connected to the transmission shaft 34 is subjected to a large external force (for example, when a typhoon occurs and the moment of inertia of the blade 210 is large, the blade 210 transmits the external force to the locking mechanism 50), the transmission shaft 34 fixed by the brake assembly 36 will continue to remain in the original position, thereby allowing the locking mechanism 50 to continue to remain in the locked position to provide effective locking, thereby preventing the blade 210 from accidentally rotating when subjected to the moment of inertia. At the same time, the transmission shaft 34 is fixed by the brake assembly 36 , so that the transmission shaft 34 will not directly transmit the external torque to the driving member 32 , thereby protecting the driving member 32 and further protecting the blade locking device 100 .

[0055] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A blade locking device, characterized in that: The blade locking device is provided in a wind turbine generator set and comprises: Base; A driving mechanism is disposed on the base; and A locking mechanism connected to the output end of the driving mechanism; Wherein, driven by the driving mechanism, the locking mechanism reciprocates between a locking position that blocks the blade from rotating and an unlocking position that allows the blade to rotate; The driving mechanism comprises a driving member, a brake assembly and a transmission shaft, wherein the brake assembly is connected between the driving member and the transmission shaft, and the brake assembly has a linkage state that allows the transmission shaft and the output end of the driving member to move synchronously, and a brake state that prevents the transmission shaft and the output end of the driving member from moving; and the locking mechanism is connected to the transmission shaft and can reciprocate under the drive of the moving transmission shaft; The locking mechanism includes a sliding assembly and a locking piece. The sliding assembly is transmission-connected to the driving mechanism and is lifted and lowered relative to the base under the action of the driving mechanism. The locking piece is fixed to the sliding assembly and extends into or out of a locking gap between two adjacent connecting bolts on the blade under the drive of the sliding assembly, and the connecting bolts connect the blade and the rotating ring of the pitch bearing.

2. The blade locking device according to claim 1, characterized in that: The base is used to be matched with the fixing ring of the pitch bearing, and a through hole is provided on the base to allow the locking member to pass through and extend into the locking gap.

3. The blade locking device according to claim 1, characterized in that: It also includes a guide column, which is fixed to the base. The sliding component is sleeved outside the guide column and can be slidably arranged along the guide column.

4. The blade locking device according to claim 1, characterized in that: It also includes a controller and a sensor, wherein the sensor is arranged on the base and is used to detect whether the locking gap is located on the moving path of the locking member, and the controller controls the driving mechanism to start when the locking gap is located on the moving path of the locking member.

5. The blade locking device according to claim 4, characterized in that: The number of the connecting bolts is multiple, and the multiple connecting bolts are evenly spaced along the circumference of the rotating circle, and the sensor includes a first sub-sensor and a second sub-sensor spaced and parallel to the circumference of the rotating circle; When the first sub-sensor detects that one of the plurality of connecting bolts reaches a first relative position and the second sub-sensor detects that another of the plurality of connecting bolts reaches a second relative position, the locking gap rotates to a moving path of the locking member.

6. The blade locking device according to claim 4, characterized in that: It also includes a baffle, a first travel switch and a second travel switch, wherein the baffle is connected to the sliding assembly and moves back and forth synchronously with the sliding assembly, the first travel switch and the second travel switch are arranged on the base at intervals and are respectively located at relative first limit positions and second limit positions, and the controller controls the driving mechanism to stop when the baffle passes through the first travel switch and the second travel switch.

7. The blade locking device according to claim 1, characterized in that: The brake assembly includes a shaft sleeve and a brake member. The two opposite ends of the shaft sleeve are respectively sleeved with the output end of the driving member and the transmission shaft. The brake member is sleeved on the transmission shaft and can selectively lock or release the transmission shaft.

8. A wind turbine generator set, characterized in that: It comprises a pitch bearing, a blade and a blade locking device as described in any one of claims 1 to 7, wherein the blade is connected to the movable ring of the pitch bearing by a plurality of spaced connecting bolts, and the blade locking device is arranged on the fixed ring of the pitch bearing and can abut against the connecting bolts along the rotation direction of the blade.

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