An automatic blade locking device and method for a wind turbine

Abstract

The application discloses an automatic blade locking device and method of a wind generating set, which comprises a blade driving part, wherein the blade driving part comprises a main driving rod and an auxiliary driving rod, a gear box is arranged between the main driving rod and the auxiliary driving rod, stopper A and stopper B are respectively arranged on the surfaces of the main driving rod and the auxiliary driving rod, limiting assembly A and limiting assembly B are respectively arranged on the two sides of the gear box, friction assembly A and friction assembly B are respectively arranged on the opposite positions of the limiting assembly A and the limiting assembly B, and a driving assembly is arranged on the top of the gear box and is used in cooperation with the friction assembly A and the friction assembly B.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to an automatic blade locking device and method for wind turbine generator sets. Background Technology

[0002] Automatic blade locking of wind turbine generators is a key component of the maintenance safety of the wind turbine rotor and main drive chain. One locking method involves using the blade thrust to rotate the wind turbine during the locking operation. Maintenance personnel observe the centering mark, align the hole, and insert the locking pin to complete the wind turbine locking. This locking method is unsafe and ineffective.

[0003] To address this issue, we propose an automatic blade locking device and method for wind turbine generators. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an automatic blade locking device and method for wind turbine generator sets.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automatic blade locking device and method for a wind turbine generator set includes a blade driving section, which comprises a main driving rod and a secondary driving rod, with a gearbox between the main driving rod and the secondary driving rod. A generator and a fan blade are respectively located at opposite ends of the main driving rod and the secondary driving rod. Brake pads A and B are respectively fixedly mounted on the surfaces of the main driving rod and the secondary driving rod. Limiting components A and B are respectively located on both sides of the gearbox, with the main driving rod and the secondary driving rod passing through the limiting components A and B respectively. Brake pads A and B are respectively located within the limiting components A and B. Friction components A and B are respectively located on opposite sides of the limiting components A and B. A driving component that cooperates with friction components A and B is located on the top of the gearbox. A locking structure for limiting the secondary driving rod is located outside the friction component A, and the locking structure includes a movable limiting member and a fixed limiting member.

[0007] As a further step in the present invention, the limiting component A includes a limiting frame A connected to the gearbox, and a limiting ring A is provided in the limiting frame A. The brake pad B is located in the limiting ring A. There are four insertion cavities A between the outer ring of the limiting ring A and the inner wall of the limiting frame A. Limiting stops A are fixedly provided on both sides of the limiting frame A, and a limiting base plate A is fixedly provided at the bottom of the limiting frame A.

[0008] As a further step in the present invention, the friction assembly A includes a side plate A, and a fixed circular block A is connected to the surface of the side plate A. A friction block A is fixedly connected to the middle position of the surface of the fixed circular block A, and four limiting blocks A are connected to the surface of the fixed circular block A and located at the outer ring position of the friction block A.

[0009] As a further step in the present invention, the limiting component B includes a limiting frame B connected to the gearbox, and a limiting ring B is provided in the limiting frame B. There are four insertion cavities B between the outer ring of the limiting ring B and the inner wall of the limiting frame B. Limiting stops B are fixedly provided on both sides of the limiting frame B, and a limiting base plate B is fixedly provided at the bottom of the limiting frame B.

[0010] As a further step in the present invention, the friction assembly B includes a side plate B, and a fixing circular block B is fixedly provided on the surface of the side plate B. A friction block B is fixedly connected to the surface of the fixing circular block B, and four limiting blocks B located at the outer ring position of the friction block B are fixedly connected to the surface of the fixing circular block B.

[0011] As a further step in the present invention, the side plate A is provided with a folding plate at the top and a toothed groove A is provided at the bottom of the folding plate; the side plate B is provided with a horizontal plate at the top and a toothed groove B is provided at the top of the horizontal plate; the driving assembly includes a cylinder, a connecting plate and a gear.

[0012] The gear is rotatably mounted on the top of the gearbox and is located between the folding plate and the horizontal plate. The gearbox meshes with tooth groove A and tooth groove B. The connecting plate is connected to the end of the horizontal plate. The cylinder is connected to the surface of the connecting plate and located on both sides of the horizontal plate. The cylinder is connected to the top of the gearbox.

[0013] As a further step in the present invention, the gearbox is in a through-connected state on one of its opposite surfaces and is provided with a cover plate by bolts. The gearbox is provided with a pressing assembly for limiting the folding plate. The pressing assembly includes a vertical plate connected to the top of the two cover plates, and a pressure block is connected to the top of the opposite surface of the vertical plate. The pressing assembly also includes a pressure plate located at the top of the folding plate, and a pressure groove for accommodating the pressure block is opened at a distance from the top of the pressure plate. Two limiting blocks are fixedly connected to the bottom of the pressure plate.

[0014] As a further step in the present invention, the movable limiting member includes a connecting ring, and the inner ring of the connecting ring is provided with a friction ring. The surface of the connecting ring is provided with a positioning ring A, and the surface of the positioning ring A is provided with a slot. The slot is arranged circumferentially on the surface of the positioning ring A. The outer ring of the connecting ring is connected to two connecting brackets, which are symmetrical about the connecting ring.

[0015] The connecting frame includes a connecting rod connected to the connecting ring, a sliding rod fixedly connected to the end of the connecting rod, and a reinforcing rod connected to the side plate A connected to the surface of the connecting rod.

[0016] As a further step in the present invention, the fixed limiting member includes a friction block fixedly sleeved on the surface of the auxiliary drive rod, and a positioning ring B is fixedly sleeved on the surface of the friction block. A plurality of locking blocks that engage with the locking slot are fixedly sleeved on the surface of the positioning ring B, and the plurality of locking blocks are arranged circumferentially on the surface of the positioning ring B.

[0017] An automatic blade locking method for wind turbine generator sets: The controller controls the cylinder to extend, pushing the connecting plate to move and causing the friction component B to move closer to the limiting component B. At the same time, the gear transmission drives the friction component A to move closer to the limiting component A, so that the friction block B approaches and contacts the surface of the brake pad A and rubs against it. The friction block A and the surface of the brake pad B approach and rub against each other, increasing the rotational resistance of the drive rod. During this process, the movement of the friction component A also drives the movable limiting component to move closer to the fixed limiting component, so that the friction ring is sleeved on the friction block, further increasing the rotational resistance of the drive rod. At the same time, the locking block and the locking groove engage, so that the drive rod does not rotate at all and is locked.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] This invention uses a method that gradually increases the resistance to rotation of the drive rod to slow down or even stop its rotation. Then, a locking block engages with a slot to restrict the rotation of the secondary drive rod, preventing the gearbox from driving the primary drive rod. Friction block A contacts and rubs against the surface of brake pad B, and friction block B720 contacts and rubs against the surface of brake pad A, slowing down the rotation of both the secondary and primary drive rods. Furthermore, the friction ring gradually increases friction by rubbing against and encasing the friction block, further increasing the resistance to rotation of the secondary and primary drive rods and even stopping them. Finally, the friction ring is fully encased in the friction block, ensuring that the positioning ring A is in contact with the positioning ring, and the locking block engages with the slot, thus locking the fan blades. This locking method is safer, reduces maintenance workload, and improves work efficiency. Attached Figure Description

[0020] Figure 1 Axial view of an automatic blade locking device for wind turbine generators proposed in this invention. Figure 1 ;

[0021] Figure 2 Axial view of an automatic blade locking device for wind turbine generators proposed in this invention. Figure 2 ;

[0022] Figure 3 for Figure 1 A partial structural breakdown diagram;

[0023] Figure 4 for Figure 3 Schematic diagram of the structure of friction component A;

[0024] Figure 5 for Figure 2 Structural breakdown diagram of the mid-to-low voltage module;

[0025] Figure 6 for Figure 3 Structural breakdown diagram of the middle limit component A;

[0026] Figure 7 for Figure 3 Detailed structural diagram of the middle limiting component B and the friction component B;

[0027] Figure 8 for Figure 1 Structural breakdown diagram of the locking structure;

[0028] Figure 9 for Figure 8 A schematic diagram of the structure of the fixed limiting component.

[0029] In the diagram: 1. Main drive rod; 110. Brake pad A; 2. Secondary drive rod; 210. Brake pad B; 3. Gearbox; 310. Cover plate; 4. Limiting assembly A; 410. Limiting frame A; 420. Limiting ring A; 430. Limiting stop bar A; 440. Limiting base plate A; 5. Limiting assembly B; 510. Limiting frame B; 520. Limiting ring B; 530. Limiting stop bar B; 540. Limiting base plate B; 6. Friction assembly A; 610. Fixed round block A; 620. Friction block A; 630. Limiting block A; 640. Side plate A; 650. Folding plate; 651. Tooth groove A; 7. Friction assembly B; 710. Fixed round block B; 720 730. Friction block B; 740. Limiting block B; 750. Side plate B; 751. Horizontal plate; 752. Tooth groove B; 8. Cylinder; 9. Connecting plate; 10. Gear; 11. Pressing assembly; 1110. Vertical plate; 1111. Pressing block; 1120. Pressing plate; 1121. Pressing groove; 1122. Limiting stop; 12. Locking structure; 1210. Movable limiting component; 1211. Connecting ring; 1212. Friction ring; 1213. Positioning ring A; 1214. Connecting frame; 12141. Connecting rod; 12142. Slide rod; 12143. Reinforcing rod; 1220. Fixed limiting component; 1221. Friction block; 1222. Positioning ring B. Detailed Implementation

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and 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. Therefore, they should not be construed as limitations on this invention.

[0031] In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] Reference Figure 1-9An automatic blade locking device for a wind turbine generator set includes a blade driving section, which comprises a main drive rod 1 and an auxiliary drive rod 2, with a gearbox 3 between the main drive rod 1 and the auxiliary drive rod 2. A generator and a fan blade are respectively located at opposite ends of the main drive rod 1 and the auxiliary drive rod 2. When the fan blade is rotated by wind, the fan blade drives the auxiliary drive rod 2 to rotate. The auxiliary drive rod 2, after being transmitted through the gearbox 3, drives the main drive rod 1 to rotate, and the main drive rod 1 drives the generator to operate. Brake pads A110 and B210 are respectively fixed on the surfaces of the main drive rod 1 and the auxiliary drive rod 2. Limiting assemblies are provided on both sides of the gearbox 3. The gearbox 3 is equipped with a gear A4 and a limiting assembly B5, wherein the main drive rod 1 and the auxiliary drive rod 2 pass through the limiting assembly A4 and the limiting assembly B5 respectively, and the brake pads A110 and B210 are located in the limiting assembly A4 and the limiting assembly B5 respectively. Friction assemblies A6 and B7 are respectively provided on opposite sides of the limiting assembly A4 and the limiting assembly B5. The top of the gearbox 3 is provided with a drive assembly that works with the friction assemblies A6 and B7. The friction assembly A6 is provided with a locking structure 12 for limiting the auxiliary drive rod 2, and the locking structure 12 includes a movable limiting member 1210 and a fixed limiting member 1220.

[0035] Reference Figure 1-9 An automatic blade locking device for a wind turbine generator set includes a limiting component A4 comprising a limiting frame A410 connected to a gearbox 3, a limiting ring A420 within the limiting frame A410, a brake pad B210 located within the limiting ring A420, four insertion cavities A between the outer ring of the limiting ring A420 and the inner wall of the limiting frame A410, limiting stops A430 fixedly provided on both sides of the limiting frame A410, wherein each of the two limiting stops A430 has a limiting groove A on its opposite surface, and a limiting base plate A440 fixedly provided at the bottom of the limiting frame A410, wherein a limiting groove B is provided at the top of the limiting base plate A440.

[0036] Reference Figure 1-9An automatic blade locking device for a wind turbine generator set includes a friction assembly A6 comprising a side plate A640, with a fixed circular block A610 connected to the surface of the side plate A640. A friction block A620 is fixedly connected to the middle position of the surface of the fixed circular block A610. The fixed circular block A610 and the friction block A620 are sleeved on the outside of the auxiliary drive rod 2 but do not contact the surface of the auxiliary drive rod 2. Four limiting blocks A630 are connected to the surface of the fixed circular block A610 and located on the outer ring of the friction block A620. Both sides of the side plate A640 are provided with convex displacement blocks A that slide with the limiting slide groove A, and the bottom of the side plate A640 is provided with convex displacement blocks B that slide with the limiting slide groove B. When the friction assembly A6 approaches the limiting assembly A4, the convex displacement block A moves in the limiting slide groove A, the convex displacement block B moves in the limiting slide groove B, the limiting block A630 is inserted into the insertion cavity A, the friction block A620 moves into the limiting ring A420, and at the same time the friction block A620 contacts the surface of the brake pad B210 and rubs against it.

[0037] Reference Figure 1-9 An automatic blade locking device for a wind turbine generator set includes a limiting component B5 comprising a limiting frame B510 connected to a gearbox 3, a limiting ring B520 within the limiting frame B510, a brake pad A110 located within the limiting ring B520, four insertion cavities B between the outer ring of the limiting ring B520 and the inner wall of the limiting frame B510, limiting stops B530 fixedly provided on both sides of the limiting frame B510, wherein each of the two limiting stops B530 has a limiting groove C on its opposite surface, and a limiting base plate B540 fixedly provided at the bottom of the limiting frame B510, wherein a limiting groove D is provided at the top of the limiting base plate B540.

[0038] Reference Figure 1-9 An automatic blade locking device for a wind turbine generator set includes a friction assembly B7 comprising a side plate B740. Both sides of the side plate B740 are provided with convex displacement blocks C that slide against limiting grooves C. The bottom of the side plate B740 is provided with a convex displacement block D that slides against limiting grooves D. A fixing circular block B710 is fixedly mounted on the surface of the side plate B740. A friction block B720 is fixedly connected to the surface of the fixing circular block B710, and four limiting blocks B710 located on the outer ring of the friction block B720 are fixedly connected to the surface of the fixing circular block B710. 30. The limiting block B730 is inserted into the insertion cavity B. The fixed round block B710 and the friction block B720 are sleeved on the outside of the main drive rod 1 and do not contact the surface of the main drive rod 1. When the friction assembly B7 approaches the limiting assembly B5, the convex displacement block C slides in the limiting groove C, the convex displacement block D slides in the limiting groove D, the limiting block B730 is inserted into the insertion cavity B, the friction block B720 is inserted into the limiting ring B520, and at the same time, the friction block B720 approaches and contacts the surface of the brake pad A110, causing friction.

[0039] Reference Figure 1-9An automatic blade locking device for a wind turbine generator set, wherein a folding plate 650 is provided on the top of a side plate A640 and a toothed groove A651 is provided on the bottom of the folding plate 650; a horizontal plate 750 is provided on the top of a side plate B740 and a toothed groove B751 is provided on the top of the horizontal plate 750; and the drive assembly includes a cylinder 8, a connecting plate 9 and a gear 10.

[0040] Gear 10 is rotatably mounted on the top of gearbox 3 and is located between folding plate 650 and horizontal plate 750. Gearbox 3 meshes with tooth groove A651 and tooth groove B751. Connecting plate 9 is connected to the end of horizontal plate 750. Cylinder 8 is connected to the surface of connecting plate 9 and located on both sides of horizontal plate 750. Cylinder 8 is connected to the top of gearbox 3. In use, cylinder 8 extends and drives horizontal plate 750 to move through connecting plate 9. Horizontal plate 750 drives friction component B7 to move between two limit bars B530. Friction component B7 also moves on top of limit base plate 540, causing friction component B7 to move closer to limit component B5. At the same time, the movement of horizontal plate 750 drives folding plate 650 to move through gear 10 meshing with it, and then drives friction component A6 to move closer to limit component A4 through folding plate 650.

[0041] Reference Figure 1-9 An automatic blade locking device for a wind turbine generator set includes a gearbox 3 with a through-hole connection between two opposing surfaces and a cover plate 310 bolted to it. The gearbox 3 also includes a pressing assembly 11 for limiting the movement of a folding plate 650. The pressing assembly 11 includes a vertical plate 1110 connected to the top of the two cover plates 310, with a pressure block 1111 connected to the top of the opposing surfaces of the vertical plate 1110. The pressing assembly 11 also includes a pressure plate 1120 located at the top of the folding plate 650, with a pressure groove 1121 at a distance from the top of the pressure plate 1120 to accommodate the pressure block 1111. Two limiting blocks 1122 are fixedly connected to the bottom of the pressure plate 1120. During use, the blades are folded... Plate 650 is located between two limiting blocks 1122, and the top of plate 650 slides in contact with the bottom of pressure plate 1120. When plate 650 is moved by gear 10, plate 650 moves at the bottom of pressure plate 1120 and between two limiting blocks 1122. The two limiting blocks 1122 can ensure that plate 650 moves linearly, and pressure plate 1120 can prevent plate 650 from leaving gear 10 and prevent tooth groove A651 from disengaging from gear 10, so as to ensure that plate 650 and horizontal plate 750 move relative to each other in the vertical position, and further make friction assembly A6 and friction assembly B7 move closer to or further away from limiting assembly A4 and limiting assembly B5 at the same time.

[0042] Reference Figure 1-9An automatic blade locking device for a wind turbine generator set includes a movable limiting member 1210 comprising a connecting ring 1211, with a friction ring 1212 on the inner ring of the connecting ring 1211, a positioning ring A1213 on the surface of the connecting ring 1211, and a slot on the surface of the positioning ring A1213, the slot being arranged circumferentially on the surface of the positioning ring A1213, and two connecting brackets 1214 connected to the outer ring of the connecting ring 1211, the two connecting brackets 1214 being symmetrical about the connecting ring 1211;

[0043] The connecting frame 1214 includes a connecting rod 12141 connected to the connecting ring 1211. A sliding rod 12142 is fixedly connected to the end of the connecting rod 12141, and a reinforcing rod 12143 connected to the side plate A640 is connected to the surface of the connecting rod 12141. In use, the sliding rod 12142 slides in the limiting groove A. The friction assembly A6 drives the connecting ring 1211 to move through the reinforcing rod 12143 and the connecting rod 12141. At the same time, the sliding rod 12142 slides in the limiting groove A, which improves the stability of the movement of the connecting ring 1211.

[0044] Reference Figure 1-9 An automatic blade locking device for a wind turbine generator set includes a fixed limiting member 1220 comprising a friction block 1221 fixedly sleeved on the surface of the auxiliary drive rod 2, and a positioning ring B1222 fixedly sleeved on the surface of the friction block 1221. The positioning ring B1222 has several locking blocks fixedly arranged circumferentially on its surface, engaging with locking slots. When the friction assembly A6 drives the movable limiting member 1210 towards the fixed limiting member 1220 via the connecting bracket 1214, the connecting ring 1211 moves outside the auxiliary drive rod 2. As the friction block 1221 rotates, the friction ring 1212 on the inner ring of the connecting ring 1211 is fitted onto the surface of the friction block 1221. The friction between the inner ring of the friction ring 1212 and the outer ring of the friction block 1221 increases the rotational resistance of the auxiliary drive rod 2, or even interferes with it, causing it to rotate slowly or not at all. When the friction ring 1212 is completely fitted onto the friction block 1221, and the positioning ring A1213 is close to the positioning ring B1222, and the locking block and the locking groove are further engaged, the auxiliary drive rod 2 cannot rotate at all, so that the fan blade is locked.

[0045] Reference Figure 1-9An automatic blade locking device and method for wind turbine generator sets is disclosed. In use, the controller controls the cylinder 8 to extend, thereby pushing the connecting plate 9 to move and causing the friction component B7 to move closer to the limiting component B5. At the same time, the gear 10 drives the friction component A6 to move closer to the limiting component A4, so that the friction block B720 approaches and rubs against the surface of the brake pad A110, and the friction block A620 approaches and rubs against the surface of the brake pad B210, thereby increasing the rotational resistance of the drive rod. During this process, the movement of the friction component A6 also drives the movable limiting component 1210 to move closer to the fixed limiting component 1220, so that the friction ring 1212 is sleeved on the friction block 1221, further increasing the rotational resistance of the drive rod. At the same time, the locking block and the locking groove engage, so that the drive rod does not rotate at all and is locked.

[0046] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

[0047] In the description of this invention, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing the invention and simplifying the description, and are not intended to 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 a limitation of the invention.

Claims

1. An automatic blade locking device for a wind turbine generator system, comprising a blade driving part, the blade driving part comprising a main driving rod (1) and a sub-driving rod (2), and a gear box (3) being arranged between the main driving rod (1) and the sub-driving rod (2), and a generator and a fan blade being respectively arranged at opposite ends of the main driving rod (1) and the sub-driving rod (2), characterized in that, The main drive rod (1) and the secondary drive rod (2) are respectively provided with stop A (110) and stop B (210) on the surface, the gear box (3) is respectively provided with limiting assembly A (4) and limiting assembly B (5) on both sides, the opposite surfaces of limiting assembly A (4) and limiting assembly B (5) are respectively provided with friction assembly A (6) and friction assembly B (7), the top of the gear box (3) is provided with a driving assembly used in cooperation with friction assembly A (6) and friction assembly B (7), the outer part of friction assembly A (6) is provided with a locking structure (12) for limiting the secondary drive rod (2), and the locking structure (12) comprises movable limiting piece (1210) and fixed limiting piece (1220); The limiting assembly A (4) comprises a limiting frame A (410) connected with the gear box (3), and a limiting ring A (420) is arranged in the limiting frame A (410), the stop B (210) is located in the limiting ring A (420), and four insertion cavities A are arranged between the outer ring of the limiting ring A (420) and the inner wall of the limiting frame A (410), limiting stop A (430) is fixedly arranged on both sides of the limiting frame A (410), and limiting bottom plate A (440) is fixedly arranged on the bottom of the limiting frame A (410); The friction assembly A (6) comprises a side plate A (640), and a fixed circular block A (610) is connected to the surface of the side plate A (640), a friction block A (620) is fixedly connected to the surface of the fixed circular block A (610), and four limiting blocks A (630) are connected to the surface of the fixed circular block A (610) and located at the outer ring position of the friction block A (620); The limiting assembly B (5) comprises a limiting frame B (510) connected with the gear box (3), and a limiting ring B (520) is arranged in the limiting frame B (510), four insertion cavities B are arranged between the outer ring of the limiting ring B (520) and the inner wall of the limiting frame B (510), limiting stop B (530) is fixedly arranged on both sides of the limiting frame B (510), and limiting bottom plate B (540) is fixedly arranged on the bottom of the limiting frame B (510); The friction assembly B (7) comprises a side plate B (740), and a fixed circular block B (710) is fixedly arranged on the surface of the side plate B (740), a friction block B (720) is fixedly connected to the surface of the fixed circular block B (710), and four limiting blocks B (730) are fixedly connected to the surface of the fixed circular block B (710) and located at the outer ring position of the friction block B (720); The top of the side plate A (640) is provided with a folding plate (650), and the folding plate (650) is provided with a tooth groove A (651) at the bottom, the top of the side plate B (740) is provided with a horizontal plate (750), and the top of the horizontal plate (750) is provided with a tooth groove B (751), the driving assembly comprises a cylinder (8), a connecting plate (9) and a gear (10). The gear (10) is arranged on the top of the gear box (3), and the gear (10) is located between the folding plate (650) and the horizontal plate (750), the gear box (3) is engaged with the gear slot A (651) and the gear slot B (751), the connecting plate (9) is connected at the end of the horizontal plate (750), the cylinder (8) is connected on the surface of the connecting plate (9) and located on both sides of the horizontal plate (750), and the cylinder (8) is connected with the top of the gear box (3); The movable limiting piece (1210) comprises a connecting ring (1211), and a friction ring (1212) is arranged on the inner ring of the connecting ring (1211); a positioning ring A (1213) is arranged on the surface of the connecting ring (1211), and a clamping groove is formed on the surface of the positioning ring A (1213); the clamping groove is arranged on the surface of the positioning ring A (1213) in a circumferential direction; two connecting frames (1214) are connected to the outer ring of the connecting ring (1211), and the two connecting frames (1214) are symmetrical to the connecting ring (1211); The connecting frame (1214) comprises a connecting rod (12141) connected to the connecting ring (1211), and a sliding rod (12142) is fixedly connected to the end of the connecting rod (12141); a reinforcing rod (12143) connected to the side plate A (640) is arranged on the surface of the connecting rod (12141); The fixed limiting piece (1220) comprises a friction block (1221) fixedly arranged on the surface of the auxiliary driving rod (2), and a positioning ring B (1222) is fixedly arranged on the surface of the friction block (1221); a plurality of clamping blocks matched with the clamping groove are fixedly arranged on the surface of the positioning ring B (1222) in a circumferential direction.

2. An automatic blade locking device for a wind turbine generator system according to claim 1, wherein One side of the gear box (3) is in a through communication state and is provided with a cover plate (310) through bolts, and the gear box (3) is provided with a pressing assembly (11) for limiting the folding plate (650); the pressing assembly (11) comprises a vertical plate (1110) connected to the top of the two cover plates (310), and a pressing block (1111) is connected to the position close to the top end of the opposite surface of the vertical plate (1110); the pressing assembly (11) further comprises a pressing plate (1120) located on the top of the folding plate (650), and a pressing groove (1121) for accommodating the pressing block (1111) is formed on the top of the pressing plate (1120) away from the position; two limiting blocks (1122) are fixedly connected to the bottom of the pressing plate (1120).

3. A method of automatically locking the blades of a wind turbine according to any of claims 1-2, characterized in that, Through the controller control cylinder (8) elongation to push the connecting plate (9) movement and drive friction assembly B (7) to limit assembly B (5) close to the movement, at the same time through the gear (10) transmission drive friction assembly A (6) to limit assembly A (4) close to the movement, so that the friction block B (720) to the surface of the brake pad A (110) close to contact and friction, friction block A (620) and brake pad B (210) surface close to contact and friction, to increase the rotation resistance of the drive rod, in the process of friction assembly A (6) movement also drive movable limiting piece (1210) to fixed limiting piece (1220) close, so that the friction ring (1212) on the friction block (1221), further increase the rotation resistance of the drive rod, at the same time, the block and the block slot card fit so that the drive rod does not rotate and is locked.

Images