Wind turbine nacelle crane locking device

Abstract

The present invention relates to the field of crane technology, and discloses a locking device for a nacelle crane of a wind turbine generator set, comprising a frame, a truss assembly is slidably sleeved on the top of the frame, an electric hoist assembly is slidably sleeved on the middle bottom end of the truss assembly, and a locking hook is sleeved on the bottom of the electric hoist assembly. By providing a snap-in groove, the snap-in groove and the top of the limit push plate are sleeved together, so that the limit push plate can be used to limit the position between the driving wheel and the slide rail, and the limit push plate can be moved downward by the rotation of the driving wheel and the driving wheel extruding the limit push plate, so that the two sides of the limit push plate are squeezed on the opposite surfaces of the two groups of limit columns, so that the ends of the limit columns located at the outer wall of the track body are sleeved with the inner wall of the limit groove, thereby realizing the locking of the slide rail to the driving wheel, solving the problem that when the traditional equipment is hoisted and moved, the driving wheel and the slide rail are displaced because the equipment stops running but the driving wheel is affected by the inertia of the movement of the hoisted objects.

Description

Technical Field

[0001] The invention relates to the technical field of cranes, in particular to a locking device for a crane in a nacelle of a wind turbine generator set. Background Art

[0002] During the maintenance of components in the nacelle of the wind turbine, it is impossible to perform maintenance and replacement operations by manpower due to the weight and location of the components. For the replacement of the output end of the yaw reducer, which weighs about 400KG, a special crane is required to ensure the safety of the replacement operation;

[0003] In the actual working process, the chain of the crane swings randomly, causing the hanging object to shake, which is easy to cause equipment damage and personal injury. At present, safety ropes are usually used for temporary fixation, and the operation process is relatively cumbersome. Summary of the invention

[0004] The present invention provides a locking device for a nacelle crane of a wind turbine generator set, which solves the problems raised by the above-mentioned background technology.

[0005] The present invention provides the following technical solution: a locking device for a nacelle crane of a wind turbine generator set comprises a frame, a truss assembly is slidably sleeved on the top of the frame, an electric hoist assembly is slidably sleeved on the middle bottom end of the truss assembly, and a locking hook is sleeved on the bottom of the electric hoist assembly.

[0006] As a preferred technical solution of the present invention: the skeleton includes a support frame, the top of the support frame is fixedly equipped with a slide rail, the four corners of the bottom of the support frame are fixedly equipped with support feet, and the tops of both sides of the support frame are fixedly equipped with limit blocks.

[0007] As a preferred technical solution of the present invention: the slide rail includes a track body, the outer walls on both sides of the track body are provided with a plurality of slide grooves, the inner walls of the slide grooves are provided with installation grooves, the middle inner walls of the slide grooves are provided with tension springs, the two ends of the tension springs are fixedly assembled with limiting columns, the inner wall of the installation groove is slidably sleeved with a limiting push plate, and the bottom inner wall of the limiting push plate is clamped with a spring.

[0008] As a preferred technical solution of the present invention: the limit column and the inner wall of the slide groove are slidably connected, the opposite surfaces of the two groups of limit columns are inclined, and the two sides of the limit push plate are adapted to the opposite surfaces of the two groups of limit columns.

[0009] As a preferred technical solution of the present invention: the truss assembly includes a connecting column, both ends of the connecting column are fixedly equipped with limit bearings, the inner walls of the bottom of both sides of the connecting column are rotatably connected with connecting shafts, the outer walls of the connecting shafts are fixedly equipped with driving wheels, the inner walls of the two groups of connecting shafts are fixedly equipped with transmission shafts, the outer walls of the transmission shafts are fixedly equipped with driven wheels, the outer edges of the driven wheels are sleeved with chains, the top of the connecting column is fixedly equipped with a first mounting frame and a second mounting frame, the outer wall of the second mounting frame is fixedly equipped with a driving motor, and the outer edge of the power output shaft of the driving motor is fixedly equipped with a driving wheel.

[0010] As a preferred technical solution of the present invention: the inner wall of the limit bearing is in contact with the outer wall of the slide rail, and the driving wheel is in contact with the top of the slide rail;

[0011] The driving wheel comprises a wheel body, and limiting grooves are arranged on both sides of the inner wall of the wheel body, and a clamping groove is arranged in an annular manner on the opposite surface of the wheel body and the top of the slide rail.

[0012] As a preferred technical solution of the present invention: the electric hoist assembly includes three groups of electric hoist bodies, two groups of electric hoist bodies are fixedly equipped with truss moving devices on the top, and another group of electric hoist bodies is fixedly equipped with a clamping plate on the top;

[0013] The two groups of electric hoist bodies are driven and connected via a truss mobile device fixedly assembled on the top and a first mounting frame, and the other group of electric hoist bodies is fixedly assembled via a clamping plate fixedly assembled on the top and a second mounting frame;

[0014] The bottoms of the three groups of electric hoist bodies are all connected by steel wire ropes and locking hooks.

[0015] As a preferred technical solution of the present invention: the locking hook includes two groups of mounting plates arranged opposite to each other, and fixing screw 1, fixing screw 2, fixing shaft 1 and fixing shaft 2 for fixing the two groups of mounting plates are arranged between the two groups of mounting plates, the outer wall of the fixing screw 2 is provided with a guide groove, the outer edge of the fixing shaft 1 is rotatably sleeved with a rotating wheel, the outer edge of the fixing shaft 2 is sleeved with a hook body, a support plate is arranged on the top of the fixing shaft 2, a telescope is fixedly installed on the top of the support plate, brake blocks are arranged on both sides of the top of the telescope, and a guide plate is fixedly installed on the bottom outer wall of the end of the brake block away from the telescope.

[0016] As a preferred technical solution of the present invention: the support plate and the mounting plate are fixedly assembled, the guide plate and the inner wall of the guide groove are slidably connected, a support rod for supporting the brake block is provided at the bottom of the brake block, an arc groove is provided at the top of the brake block, and an anti-slip pattern is provided on the inner wall of the arc groove, and the end of the brake block away from the telescopic device is located between the rotating wheel and the second fixing screw;

[0017] The contact surface between the hook body and the second fixed shaft is inlaid with a pressure sensor.

[0018] The present invention has the following beneficial effects:

[0019] 1. The locking device of the crane in the cabin of the wind turbine generator set is provided with a snap-in groove, and the snap-in groove and the top of the limit push plate are connected to each other, so that the driving wheel and the slide rail can be limited by the limit push plate, and the rotation of the driving wheel is used to squeeze the limit push plate by the driving wheel, so that the limit push plate moves downward, and then the two sides of the limit push plate are squeezed against the opposite surfaces of the two groups of limit columns, so that the ends of the limit columns located at the outer wall of the track body are connected to the inner wall of the limit groove, so that the slide rail locks the driving wheel, and solves the problem that when the traditional equipment is hoisted and moved, the driving wheel and the slide rail are displaced because the equipment stops running but the driving wheel is affected by the inertia of the moving objects.

[0020] 2. The locking device of the crane in the cabin of the wind turbine generator set is equipped with three sets of electric hoist bodies. When the equipment is lifting objects, three sets of locking hooks are used to connect the three different positions of the objects respectively, so that the objects can be pulled by forces in three different directions at the same time during the lifting process, thereby solving the problem of traditional cranes using a set of wire ropes and hooks to connect from the same position, causing the objects to shake.

[0021] 3. For the locking device of the crane in the cabin of the wind turbine generator set, if the wire rope breaks, the pressure collected by the pressure sensor through the hook body and the fixed shaft 2 changes, and the controller controls the telescope to extend, so that the moving end of the telescope pushes the two sets of brake blocks toward the side of the fixed screw 2, and the end of the brake block away from the telescope is located between the rotating wheel and the fixed screw 2, so that the brake block and the wire rope fit together, so that the brake block limits the wire rope through the fixed screw 2 to avoid the problem of further falling of objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the skeleton structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the lock hook structure of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the truss assembly of the present invention;

[0026] Figure 5 It is a schematic diagram of the slide rail structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the installation slot structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the driving wheel structure of the present invention;

[0029] Figure 8 This is a schematic diagram of the driving wheel structure of the present invention;

[0030] Fig. 9 This is a schematic diagram of the structure of the electric hoist assembly of the present invention;

[0031] Fig.10 This is a schematic diagram of the lock hook structure of the present invention;

[0032] Fig.11 This is a schematic diagram of the support plate structure of the present invention;

[0033] Fig.12 It is a schematic diagram of the structure of the pressure sensor of the present invention.

[0034] In the figure: 1. Frame; 2. Truss assembly; 3. Electric hoist assembly; 4. Lock hook;

[0035] 101, support frame; 102, slide rail; 103, support foot; 104, limit block;

[0036] 1021, track body; 1022, slide groove; 1023, mounting groove; 1024, tension spring; 1025, limit column; 1026, limit push plate; 1027, spring;

[0037] 201, connecting column; 202, limiting bearing; 203, driving wheel; 204, connecting shaft; 205, transmission shaft; 206, driven wheel; 207, chain; 208, first mounting frame; 209, second mounting frame; 210, driving motor; 211, driving wheel;

[0038] 2031, wheel body; 2032, limiting groove; 2033, clamping groove;

[0039] 31. Electric hoist body; 32. Truss mobile equipment; 33. Snap-on plate;

[0040] 401, mounting plate; 402, fixing screw one; 403, fixing screw two; 404, guide groove; 405, fixing shaft one; 406, rotating wheel; 407, fixing shaft two; 408, hook body; 409, pressure sensor; 410, support rod; 411, support plate; 412, telescope; 413, brake block; 414, guide plate. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1 - Fig.12 The wind turbine nacelle crane locking device comprises a frame 1, a truss assembly 2 is slidably sleeved on the top of the frame 1, an electric hoist assembly 3 is slidably sleeved on the bottom of the middle of the truss assembly 2, and a locking hook 4 is sleeved on the bottom of the electric hoist assembly 3.

[0043] In a preferred embodiment: the skeleton 1 includes a support frame 101, a slide rail 102 is fixedly installed on the top of the support frame 101, support feet 103 are fixedly installed at the four corners of the bottom of the support frame 101, and limit blocks 104 are fixedly installed on the tops of both sides of the support frame 101.

[0044] In the above structure, the truss assembly 2 is supported by the supporting legs 103 , and the electric hoist assembly 3 is guided by the slide rail 102 so that the electric hoist assembly 3 can move along the slide rail 102 .

[0045] In a preferred embodiment: the slide rail 102 includes a track body 1021, and a plurality of slide grooves 1022 are opened on the outer walls of both sides of the track body 1021, and an installation groove 1023 is opened on the inner wall of the slide groove 1022. A tension spring 1024 is arranged on the middle inner wall of the slide groove 1022, and limiting columns 1025 are fixedly assembled at both ends of the tension spring 1024. The inner wall of the installation groove 1023 is slidably sleeved with a limiting push plate 1026, and a spring 1027 is clamped on the bottom inner wall of the limiting push plate 1026.

[0046] In a preferred embodiment, the limiting posts 1025 and the inner wall of the slide groove 1022 are slidably connected, the opposite surfaces of the two groups of limiting posts 1025 are inclined, and the two sides of the limiting push plate 1026 are adapted to the opposite surfaces of the two groups of limiting posts 1025.

[0047] In the above structure, the top of the limiting push plate 1026 protrudes from the top of the track body 1021, so that the friction between the slide rail 102 and the truss assembly 2 is increased. When the limiting push plate 1026 moves upward through the spring 1027, the two groups of limiting columns 1025 move relative to each other through the tension of the tension spring 1024, thereby reducing the area of ​​the limiting columns 1025 located on the outer wall of the track body 1021. When the truss assembly 2 contacts the top of the limiting push plate 1026 of the corresponding group, the gravity of the truss assembly 2 is used to move the limiting push plate 1026 downward, thereby causing the two sides of the limiting push plate 1026 to squeeze the opposite surfaces of the two groups of limiting columns 1025, thereby increasing the area of ​​the limiting columns 1025 located on the outer wall of the track body 1021.

[0048] In a preferred embodiment: the truss assembly 2 includes a connecting column 201, both ends of the connecting column 201 are fixedly equipped with limit bearings 202, the inner walls of the bottom of both sides of the connecting column 201 are rotatably connected to the connecting shaft 204, the outer wall of the connecting shaft 204 is fixedly equipped with a driving wheel 203, the inner walls of the two groups of connecting shafts 204 are fixedly equipped with a transmission shaft 205, the outer wall of the transmission shaft 205 is fixedly equipped with a driven wheel 206, the outer edge of the driven wheel 206 is sleeved with a chain 207, the top of the connecting column 201 is fixedly equipped with a first mounting frame 208 and a second mounting frame 209, the outer wall of the second mounting frame 209 is fixedly equipped with a driving motor 210, and the outer edge of the power output shaft of the driving motor 210 is fixedly equipped with a driving wheel 211.

[0049] In a preferred embodiment: the inner wall of the limit bearing 202 is in contact with the outer wall of the slide rail 102, and the driving wheel 203 is in contact with the top of the slide rail 102;

[0050] The driving wheel 203 includes a wheel body 2031 . The inner walls of the wheel body 2031 are provided with limiting grooves 2032 on both sides. The opposite surfaces of the wheel body 2031 and the top of the slide rail 102 are provided with an annular clamping groove 2033 .

[0051] In the above structure, the driving motor 210 drives the link through the driving wheel 211 and the chain 207, so that the chain 207 drives the transmission shaft 205 through the driven wheel 206, and then the transmission shaft 205 drives the driving wheel 203 to rotate through the connecting shaft 204, so that the truss assembly 2 located at the top of the frame 1 moves axially, and by providing the clamping groove 2033, the clamping groove 2033 and the top of the limit push plate 1026 are connected, so that the driving wheel 203 and the slide rail 1 02 can be limited by the limit push plate 1026, and by utilizing the rotation of the driving wheel 203, the driving wheel 203 squeezes the limit push plate 1026 to move the limit push plate 1026 downward, and then the two sides of the limit push plate 1026 squeeze the opposite surfaces of the two groups of limit columns 1025, so that the ends of the limit columns 1025 located on the outer wall of the track body 1021 are engaged with the inner wall of the limit groove 2032, thereby realizing the locking of the slide rail 102 to the driving wheel 203.

[0052] In a preferred embodiment: the electric hoist assembly 3 includes three groups of electric hoist bodies 31, two groups of electric hoist bodies 31 are fixedly equipped with truss moving devices 32 on the top, and another group of electric hoist bodies 31 is fixedly equipped with a clamping plate 33 on the top;

[0053] Two groups of electric hoist bodies 31 are driven and connected through a truss moving device 32 fixedly assembled on the top and a first mounting frame 208, and another group of electric hoist bodies 31 are fixedly assembled through a clamping plate 33 fixedly assembled on the top and a second mounting frame 209;

[0054] The bottoms of the three sets of electric hoist bodies 31 are all connected by steel wire ropes and locking hooks 4.

[0055] The electric hoist body 31 can use an existing wire rope electric hoist to drive the lock hook 4 up and down;

[0056] In the above structure, by setting three groups of electric hoist bodies 31, when the equipment is lifting objects, three groups of locking hooks 4 are used to connect three different positions of the objects respectively, so that the objects can be pulled by forces in three different directions at the same time during the lifting process, thereby solving the problem of traditional cranes using a group of steel wire ropes and hooks to connect at the same position, causing the objects to shake.

[0057] In a preferred embodiment: the locking hook 4 includes two groups of mounting plates 401 arranged opposite to each other, and a fixing screw 1 402, a fixing screw 2 403, a fixing shaft 1 405 and a fixing shaft 2 407 for fixing the two groups of mounting plates 401 are arranged between the two groups of mounting plates 401, a guide groove 404 is provided on the outer wall of the fixing screw 2 403, a rotating wheel 406 is rotatably sleeved on the outer edge of the fixing shaft 1 405, a hook body 408 is sleeved on the outer edge of the fixing shaft 2 407, a support plate 411 is arranged on the top of the fixing shaft 2 407, a telescope 412 is fixedly installed on the top of the support plate 411, brake blocks 413 are arranged on both sides of the top of the telescope 412, and a guide plate 414 is fixedly installed on the bottom outer wall of the end of the brake block 413 away from the telescope 412.

[0058] In a preferred embodiment: the support plate 411 and the mounting plate 401 are fixedly assembled, the guide plate 414 and the inner wall of the guide groove 404 are slidably connected, the bottom of the brake block 413 is provided with a support rod 410 for supporting the brake block 413, the top of the brake block 413 is provided with an arc groove, and the inner wall of the arc groove is provided with anti-slip grooves, and the end of the brake block 413 away from the telescopic device 412 is located between the rotating wheel 406 and the second fixing screw 403;

[0059] The contact surface between the hook body 408 and the second fixed shaft 407 is inlaid with a pressure sensor 409 .

[0060] In the above structure, by embedding the pressure sensor 409 on the contact surface between the hook body 408 and the second fixed shaft 407, after the lock hook 4 is connected with the object, when it is moved through the truss assembly 2, the gravity of the object is transmitted to the electric hoist assembly 3 through the lock hook 4, so that the hook body 408 and the second fixed shaft 407 are squeezed, and then the pressure sensor 409 realizes pressure collection, and the pressure data of the pressure sensor 409 is monitored by the controller. During the operation of the equipment, if the wire rope breaks, the pressure collected by the pressure sensor 409 through the hook body 408 and the second fixed shaft 407 changes, and the controller controls the telescoping device 412 to extend, so that the telescoping device 412 is extended. The movable end of the device 412 pushes the two sets of brake blocks 413 toward the side of the second fixing screw 403, and the end of the brake block 413 away from the telescopic device 412 is located between the rotating wheel 406 and the second fixing screw 403, so that the brake block 413 and the wire rope are in contact with each other, so that the brake block 413 limits the wire rope through the second fixing screw 403 to avoid the problem of further falling of the object. On the other hand, the friction between the wire rope and the brake block 413 is used to make the wire rope drive the brake block 413 to move further toward the side of the second fixing screw 403, so that the space between the wire rope and the second fixing screw 403 is further reduced through the brake block 413;

[0061] The guide groove 404 is used to limit the moving direction of the brake block 413, and the support rod 410 is used to limit the installation position of the brake block 413. The top of the telescopic device 412 is a magnet, so that the telescopic device 412 can drive the brake block 413 to move by magnetic force when it is contracted, thereby realizing the relative movement of the two groups of brake blocks 413.

[0062] Working principle:

[0063] The driving motor 210 drives the link through the driving wheel 211 and the chain 207, so that the chain 207 drives the transmission shaft 205 through the driven wheel 206, and then the transmission shaft 205 drives the driving wheel 203 to rotate through the connecting shaft 204, so that the truss assembly 2 located at the top of the frame 1 moves axially, and by providing a clamping groove 2033, the clamping groove 2033 and the top of the limiting push plate 1026 are connected, so that the driving wheel 203 and the slide rail 102 can be limited by the limiting push plate 1026, and the rotation of the driving wheel 203 is used to The driving wheel 203 squeezes the limiting push plate 1026, so that the limiting push plate 1026 moves downward, and then the two sides of the limiting push plate 1026 squeeze the opposite surfaces of the two groups of limiting columns 1025, so that the ends of the limiting columns 1025 located at the outer wall of the track body 1021 are sleeved with the inner wall of the limiting groove 2032, so that the slide rail 102 locks the driving wheel 203, which solves the problem that when the traditional equipment is hoisted and moved, the driving wheel 203 is displaced from the slide rail 102 because the equipment stops running but the driving wheel 203 is affected by the inertia of the hoisted objects;

[0064] By setting three sets of electric hoist bodies 31, when the equipment is lifting objects, three sets of lock hooks 4 are used to connect three different positions of the objects respectively, so that the objects can be pulled by forces in three different directions at the same time during the lifting process, thereby solving the problem that the traditional crane uses a set of wire ropes and hooks to connect at the same position, causing the objects to shake;

[0065] By embedding the pressure sensor 409 on the contact surface between the hook body 408 and the second fixed shaft 407, after the lock hook 4 is connected with the object, when it is moved through the truss assembly 2, the gravity of the object is transmitted to the electric hoist assembly 3 through the lock hook 4, so that the hook body 408 and the second fixed shaft 407 are squeezed, and then the pressure sensor 409 realizes pressure collection, and the pressure data of the pressure sensor 409 is monitored by the controller. During the operation of the equipment, if the wire rope breaks, the pressure collected by the pressure sensor 409 through the hook body 408 and the second fixed shaft 407 changes, and the controller controls the retractor 412 to extend, so that the retractor 41 2 pushes the two sets of brake blocks 413 toward the side of the second fixing screw 403, and the end of the brake block 413 away from the telescopic device 412 is located between the rotating wheel 406 and the second fixing screw 403, so that the brake block 413 and the wire rope are in contact with each other, so that the brake block 413 limits the wire rope through the second fixing screw 403 to prevent the object from falling further. On the other hand, the friction between the wire rope and the brake block 413 is used to make the wire rope drive the brake block 413 to move further toward the side of the second fixing screw 403, so that the space between the wire rope and the second fixing screw 403 is further reduced through the brake block 413;

[0066] The guide groove 404 is used to limit the moving direction of the brake block 413, and the support rod 410 is used to limit the installation position of the brake block 413. The top of the telescopic device 412 is a magnet, so that the telescopic device 412 can drive the brake block 413 to move by magnetic force when it is contracted, thereby realizing the relative movement of the two groups of brake blocks 413.

[0067] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0068] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A locking device for a nacelle crane of a wind turbine generator set, comprising a frame (1), characterized in that: The top of the frame (1) is slidably sleeved with a truss assembly (2), the middle bottom end of the truss assembly (2) is slidably sleeved with an electric hoist assembly (3), and the bottom of the electric hoist assembly (3) is sleeved with a locking hook (4); The skeleton (1) comprises a support frame (101), a slide rail (102) is fixedly mounted on the top of the support frame (101), the slide rail (102) comprises a track body (1021), a plurality of slide grooves (1022) are provided on the outer walls of both sides of the track body (1021), an installation groove (1023) is provided on the inner wall of the slide groove (1022), a tension spring (1024) is provided on the inner wall of the middle part of the slide groove (1022), limiting columns (1025) are fixedly mounted on both ends of the tension spring (1024), a limiting push plate (1026) is slidably sleeved on the inner wall of the installation groove (1023), and a spring (1027) is clamped on the inner wall at the bottom of the limiting push plate (1026); The limiting posts (1025) and the inner wall of the slide groove (1022) are slidably sleeved, the opposing surfaces of the two groups of limiting posts (1025) are arranged in an inclined manner, and the two sides of the limiting push plate (1026) are adapted to the opposing surfaces of the two groups of limiting posts (1025); The truss assembly (2) comprises a connecting column (201), both ends of the connecting column (201) are fixedly equipped with limit bearings (202), the bottom inner walls of both sides of the connecting column (201) are rotatably connected to connecting shafts (204), and the outer wall of the connecting shaft (204) is fixedly equipped with a driving wheel (203); The driving wheel (203) comprises a wheel body (2031), and limiting grooves (2032) are provided on both sides of the inner wall of the wheel body (2031), and a clamping groove (2033) is provided in an annular manner on the opposite surfaces of the wheel body (2031) and the top of the slide rail (102); The electric hoist assembly (3) comprises three groups of electric hoist bodies (31), two groups of the electric hoist bodies (31) are fixedly equipped with truss moving devices (32) on the top, and another group of the electric hoist bodies (31) is fixedly equipped with a clamping plate (33) on the top; The bottoms of the three groups of electric hoist bodies (31) are all connected by steel wire ropes and locking hooks (4).

2. The locking device for the nacelle crane of a wind turbine generator set according to claim 1, characterized in that: Support feet (103) are fixedly mounted at the four corners of the bottom of the support frame (101), and limiting blocks (104) are fixedly mounted at the tops of both sides of the support frame (101).

3. The locking device for the nacelle crane of a wind turbine generator set according to claim 1, characterized in that: The inner walls of the two groups of connecting shafts (204) are fixedly mounted with a transmission shaft (205), the outer wall of the transmission shaft (205) is fixedly mounted with a driven wheel (206), the outer edge of the driven wheel (206) is sleeved with a chain (207), the top of the connecting column (201) is fixedly mounted with a first mounting frame (208) and a second mounting frame (209), the outer wall of the second mounting frame (209) is fixedly mounted with a driving motor (210), and the outer edge of the power output shaft of the driving motor (210) is fixedly mounted with a driving wheel (211).

4. The locking device for the nacelle crane of a wind turbine generator set according to claim 3 is characterized in that: The inner wall of the limit bearing (202) fits with the outer wall of the slide rail (102), and the driving wheel (203) fits with the top of the slide rail (102).

5. The locking device for the nacelle crane of a wind turbine generator set according to claim 4, characterized in that: Two groups of the electric hoist bodies (31) are drivingly connected via a truss moving device (32) fixedly assembled on the top and a first mounting frame (208), and another group of the electric hoist bodies (31) are fixedly assembled via a clamping plate (33) fixedly assembled on the top and a second mounting frame (209).

6. The locking device for the nacelle crane of a wind turbine generator set according to claim 1, characterized in that: The locking hook (4) comprises two groups of mounting plates (401) arranged opposite to each other, and a fixing screw 1 (402), a fixing screw 2 (403), a fixing shaft 1 (405) and a fixing shaft 2 (407) for fixing the two groups of mounting plates (401) are arranged between the two groups of mounting plates (401), a guide groove (404) is provided on the outer wall of the fixing screw 2 (403), a rotating wheel (406) is rotatably sleeved on the outer edge of the fixing shaft 1 (405), a hook body (408) is sleeved on the outer edge of the fixing shaft 2 (407), a supporting plate (411) is arranged on the top of the fixing shaft 2 (407), a telescope (412) is fixedly mounted on the top of the supporting plate (411), brake blocks (413) are arranged on both sides of the top of the telescope (412), and a guide plate (414) is fixedly mounted on the outer wall of the bottom of one end of the brake block (413) away from the telescope (412).

7. The locking device for the nacelle crane of a wind turbine generator set according to claim 6, characterized in that: The support plate (411) and the mounting plate (401) are fixedly assembled, the guide plate (414) and the inner wall of the guide groove (404) are slidably connected, a support rod (410) for supporting the brake block (413) is provided at the bottom of the brake block (413), an arc groove is provided at the top of the brake block (413), and an anti-slip groove is provided on the inner wall of the arc groove, and an end of the brake block (413) away from the telescopic device (412) is located between the rotating wheel (406) and the second fixing screw (403); The contact surface between the hook body (408) and the second fixed shaft (407) is inlaid with a pressure sensor (409).

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