A fan blade hanger and control system

Abstract

This solution discloses a wind turbine blade hanger and control system. The wind turbine blade hanger includes a hanging frame and C-shaped clamping mechanisms symmetrically arranged on both sides thereof, a hanging arm arranged at the center of the hanging frame, and a variable pitch structure symmetrically arranged on both sides of the hanging frame. The C-shaped clamping mechanism is a clamping structure with movable clamping on the upper side and adjustable positioning on the lower side. It includes an upper clamping mechanism and a lower bracket mechanism. The clamping position is a straight-line composite structure. The upper clamping mechanism is set through the gantry on the hanging frame and is hinged to the lower edge connection end of the hanging frame through a stabilizing link to form a triangular mechanism. The lower bracket mechanism is fixed to the lower edge connection end. The upper clamping mechanism, the lower bracket mechanism, and the part acting on the blade are all movable clamping ends. This solution has the characteristics of centralized control system, convenient transportation, simple maintenance, stable clamping, and strong applicability.

Description

Technical Field

[0001] The present invention relates to the field of wind power installation, and in particular to a wind turbine blade hanger and control system. Background Art

[0002] As competition in the wind power industry intensifies, in order to reduce the cost per kilowatt-hour, the capacity and swept area of wind turbines are growing at an increasingly rapid rate, and the length and weight of wind turbine blades are also increasing sharply.

[0003] This means that the weight of the impeller will exceed the lifting capacity of existing cranes, and the cost of upgrading to more powerful cranes is huge and not economical.

[0004] Traditional impeller installation methods, however, are slow and have low wind speed compatibility. These factors make them increasingly difficult to adapt to the technological developments of wind power. Against this backdrop, single-blade installation technology, using a single-blade sling, is well-suited to these new requirements. By installing the turbine hub and blades separately, the weight of each installation is significantly reduced.

[0005] Regarding CN202122328891.1, a center of gravity self-adjusting blade aerial group hoist discloses a wind turbine blade hoist solution, which solves the center of gravity control problem through two cantilevers. The center of gravity adjustment of this split method is complicated. Although it can solve the pitch adjustment problem, its adjustment considers many parameter variables. At the same time, in the design of the clamping end, the traditional multi-point contour support method is adopted, which has poor ability to adapt to the arc surface of the blade and has disadvantages in clamping stability.

[0006] Based on this, it is necessary to develop a new type of fan blade hanger. Summary of the Invention

[0007] In order to solve the above problems, this solution provides a fan blade hanger.

[0008] The technical means adopted in this scheme are: a wind turbine blade hanger, including a hanging frame and a C-shaped clamping mechanism symmetrically arranged on both sides thereof, and also including a hanging arm arranged at the center position of the hanging frame, and also including a pitch structure, which is symmetrically arranged on both sides of the hanging frame. The C-shaped clamping mechanism is a clamping structure with movable clamping on the upper side and adjustable positioning on the lower side, including an upper clamping mechanism and a lower bracket mechanism, and the clamping position is a one-line composite structure. The upper clamping mechanism is arranged through the gantry on the hanging frame, and is hinged to the lower edge connecting end of the hanging frame through a stabilizing link to form a triangular mechanism; the lower bracket mechanism is fixed to the lower edge connecting end, and the upper clamping mechanism, the lower bracket mechanism and the part acting on the blade are all movable clamping ends.

[0009] Furthermore, the pitch structure includes a pitch cylinder and a counterweight cantilever hinged on the hanging frame. The counterweight cantilever is an L-shaped cantilever, one end of which is hinged to the hanging frame and is simultaneously hinged to the output end of the pitch cylinder, and the other end is provided with a counterweight block. The pitch cylinder controls the rotation angle of the counterweight block to be greater than 90°.

[0010] Furthermore, the upper clamping mechanism includes a blade clamping cylinder, the upper end of which is hinged to the gantry, the lower output end of which is hinged to the stabilizing link, and an upper composite rocking arm, which is hinged to the stabilizing link and has a clamping surface facing downward.

[0011] Furthermore, the lower bracket mechanism includes an L-shaped bracket body, one side of which is fixed to the lower edge connection end, and the other end is provided with a lower composite swing arm, with the clamping surface facing upward.

[0012] Furthermore, the lower composite swing arm is hinged to the main support block on the lateral adjustment seat, the lateral adjustment seat is fixed to the inclination adjustment block, the inclination adjustment block is fixed to the L-shaped bracket body, and an auxiliary swing arm is also provided at the outer end of the L-shaped bracket body.

[0013] Furthermore, the auxiliary swing arm is hinged to the auxiliary connecting end, and the auxiliary connecting end is fixed to the L-shaped bracket body through a height adjustment block and an inclined connecting arm connected in sequence, so that the auxiliary swing arm is inclined inward.

[0014] Furthermore, the upper compound swing arm and the lower compound swing arm have the same structural form, including a first swing arm, a second swing arm and a clamping workpiece connected in sequence, the center position of the second swing arm is hinged to the two ends of the first swing arm, and the clamping workpiece is arranged at the two ends of the second swing arm through a universal ball joint.

[0015] Furthermore, an anti-collision rubber seat is provided on the L-shaped bracket body, and an EPDM rubber surface is provided on the clamping workpiece and the auxiliary swing arm.

[0016] Furthermore, the boom is hinged to the hanging frame, and a tilting cylinder is hinged on the hanging frame to act on the boom, and a rotating hanging block is provided on the top of the boom.

[0017] The spreader based on this solution also provides a control system, including a hydraulic system, an electrical system, a power system and a safety protection system;

[0018] The hydraulic system includes a main control electro-hydraulic system and an emergency electro-hydraulic control system;

[0019] The power system includes a generator and a battery pack;

[0020] The safety protection system includes a weighing sensor provided on the sling and a guardrail provided on the sling frame;

[0021] The electrical system includes a flat panel controller for secondary spreader operation, parameter setting, parameter display, and video monitoring;

[0022] Backup remote control, used for uncoupling operation after the main control system fails;

[0023] Video monitoring system for monitoring clamping points, visual assistance for spreader control during unhooking, and video storage;

[0024] Wireless system for monitoring data exchange between the tablet controller and the video surveillance system;

[0025] Hydraulic oil tank temperature control system, used for high temperature alarm and low temperature preheating;

[0026] Cabinet constant temperature system, used to control the internal environment temperature of the cabinet;

[0027] Hoisting data storage system, used to record all parameter data of the control mainboard when the hoist is working;

[0028] Multiple sets of load measuring equipment for load detection of slings and safe lifting;

[0029] Multiple sets of auxiliary measuring equipment for controlling the lifting parameters of slings.

[0030] In summary, this solution has the following advantages:

[0031] This solution provides a wind turbine blade hanger that can adjust the blade's tilt angle by ±5° along its length, and can also achieve 0~+10° pitch adjustment with the blade, solving the problem of inaccurate lateral center of gravity and difficulty in accurately clamping the blade when it leaves the factory.

[0032] The wind turbine blade hoist provided by this solution ensures that the blade does not slip during the hoisting process through the friction between the rubber parts and the blade surface after clamping. The maximum clamping pressure acting on the blade surface is ≤0.5Mpa, which ensures the integrity of the blade and is not easily damaged. In addition, the blade shape can be changed by moving the position and inclination adjustment block of the lower composite swing arm.

[0033] The fan blade hanger control system provided by this solution is centralized on the hanging frame, which is convenient for transportation and simple for maintenance.

[0034] The wind turbine blade hanger provided by this solution adopts a straight-line clamping method in the clamping mechanism. The upper and lower composite swing arms adopt a block-type swing adaptive mechanism, which has the function of adaptively fitting the blade surface to ensure clamping stability. There is no need to replace the upper and lower composite swing arms for different blades.

[0035] The wind turbine blade hoist provided in this solution uses a backup hydraulic and power system, combined with a monitoring camera system, to further ensure work safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic structural diagram of the present invention;

[0037] Figure 2 It is a schematic diagram of the boom arrangement of the present invention;

[0038] Figure 3 Schematic diagram of the pitch structure of the present invention;

[0039] Figure 4 Schematic diagram of the upper clamping mechanism of the present invention;

[0040] Figure 5 is a schematic diagram of the lower bracket mechanism of the present invention;

[0041] Figure 6 It is a schematic diagram of the connection setting of the lower composite swing arm;

[0042] Figure 7 It is a schematic diagram of the upper composite swing arm structure;

[0043] Figure 8 It is a schematic diagram of system safety control;

[0044] Figure 9 This is a diagram of the auxiliary swing arm setting. DETAILED DESCRIPTION

[0045] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations and multiple embodiments.

[0046] Example:

[0047] This embodiment provides a fan blade hanger, such as Figure 1-9 As shown, it includes a hanging frame 1 and C-shaped clamping mechanisms 2 symmetrically arranged on both sides thereof, and also includes a hanging arm 3 arranged at the center position of the hanging frame 1.

[0048] Among them, the role of the boom 3 is to control the tilt angle. Specifically, the boom 3 is hinged to the hanging frame 1, and the hanging frame 1 is hinged with a tilt cylinder 7 to act on the boom 3. A rotating hanger block 31 is provided on the top of the boom 3. Through the extension and retraction of the tilt cylinder 7, the relative angle between the boom and the hanging frame is changed, thereby realizing the longitudinal tilt of the entire sling.

[0049] A rotating lifting block is provided above the boom. When the entire boom tilts, the rotating lifting block forms an angle with the boom to prevent the shackle from being subjected to torque.

[0050] This sling also includes a pitch structure 4, which is symmetrically arranged on both sides of the hanging frame 1. The pitch structure 4 includes a pitch cylinder 41 and a counterweight cantilever 42 hinged to the hanging frame 1. The counterweight cantilever 42 is an L-shaped cantilever, one end of which is hinged to the hanging frame 1 and is also hinged to the output end of the pitch cylinder 41, and the other end is provided with a counterweight block 43. The pitch cylinder 41 controls the rotation angle of the counterweight block 43 to be greater than 90°.

[0051] When the pitch is changed, the counterweight cantilever is rotated by the extension and contraction of the pitch cylinder 41, thereby changing the center of gravity position of the sling and blade assembly to achieve the purpose of lateral pitch change.

[0052] The L-shaped setting of the counterweight cantilever increases the rotation space of the counterweight block, and the single set of oil cylinder adjustment and counterweights on both sides are more conducive to pitch adjustment.

[0053] Specifically, the tilt adjustment of the boom can achieve ±5° tilt angle adjustment in the blade length direction (i.e., the hub turning direction), and the variable pitch structure can also achieve 0~+10° variable pitch with blades.

[0054] The two-way adjustment function solves the problem of inaccurate lateral center of gravity of the blades when they leave the factory and the difficulty in accurately clamping the blades. It also meets the requirements for adjusting the blade root bolt holes.

[0055] As a clamping component for the blade, the C-shaped clamping mechanism 2 is a clamping structure with movable clamping on the upper side and adjustable positioning on the lower side, including an upper clamping mechanism and a lower bracket mechanism, and the clamping position is a straight-line composite structure.

[0056] Combined with attachment Figure 1 and 4 The upper clamping mechanism is set through the gantry 11 on the hanging frame 1, and is hinged to the lower edge connection end 12 of the hanging frame 1 through the stabilizing link 5 to form a triangular mechanism; that is, the gantry is the first fulcrum of the upper clamping mechanism, and the two ends of the stabilizing link 5 are the second fulcrum and the third fulcrum respectively, forming a stable downward clamping structure.

[0057] The upper clamping mechanism includes a blade clamping cylinder 21, the upper end of which is hinged to the gantry 11, and the lower output end is hinged to the stabilizing link 5, and also includes an upper composite rocking arm 22, which is hinged to the stabilizing link 5 and has a clamping surface downward.

[0058] For details, please refer to the attached Figure 7 The upper composite rocker arm 22 includes a first rocker arm 61, a second rocker arm 62 and a workpiece clamping 63 connected in sequence. The center position of the second rocker arm 62 is hinged to the two ends of the first rocker arm 61, and the workpiece clamping 63 is arranged at the two ends of the second rocker arm 62 through a universal ball joint 64.

[0059] In terms of connection, the first rocker arm is hinged to the stabilizing link 5, so that when the blade clamping cylinder 21 acts, the clamped workpiece 63 can be pressed down and act on the blade surface.

[0060] As a blade protection design and blade anti-slip design, the clamping workpiece 63 is provided with an EPDM rubber surface, which not only increases the friction coefficient but also avoids damage to the paint on the blade surface.

[0061] The structure of the upper composite rocking arm 22 realizes universal multi-dimensional angle adjustment through the adjustment of the double-stage rocking and universal ball joint, which better adapts to the changes in the blade surface in the clamping area, so that there is no need to replace the components of the upper clamping mechanism for different blade specifications.

[0062] Continue to refer to the attached Figure 1 、 5 and 6, the lower bracket mechanism is fixed to the lower edge connecting end 12, and the lower bracket mechanism includes an L-shaped bracket body 23, one side of which is fixed to the lower edge connecting end 12, and the other end is provided with a lower composite swing arm 24, and the clamping surface is upward.

[0063] Among them, the lower compound rocking arm 24 is hinged to the main support block 251 on the lateral adjustment seat 25. Since the lower compound rocking arm 24 includes a first rocking arm 61, a second rocking arm 62 and a clamping workpiece 63 connected in sequence, the center position of the second rocking arm 62 is hinged to the two ends of the first rocking arm 61, and the clamping workpiece 63 is arranged at the two ends of the second rocking arm 62 through a universal ball joint 64, then the first rocking arm 61 is hinged to the main support block 251.

[0064] The lateral adjustment seat 25 is fixed to the inclination adjustment block 26 , and the inclination adjustment block 26 is fixed to the L-shaped bracket body 23 .

[0065] The inclination adjustment block 26 is used for adjusting the inclination, and the lateral adjustment seat 25 is used for adjusting the inner and outer sides of the lower composite swing arm 24 relative to the L-shaped bracket body 23 (adjusting the clamping depth).

[0066] The outer end of the L-shaped bracket body 23 is further provided with an auxiliary swing arm 27, which is more conducive to the placement of the blades.

[0067] Furthermore, the auxiliary swing arm 27 is hinged to the auxiliary connecting end 28, and the auxiliary connecting end 28 is fixed to the L-shaped bracket body 23 through a height adjustment block 29 and an inclined connecting arm 210 connected in sequence, and the auxiliary swing arm 27 is tilted inward. The auxiliary connecting end 28 is slightly higher than the lower compound swing arm 24 through the height adjustment block 29 and the inclined connecting arm 210, and the oblique inward-cutting method is more beneficial to the setting of the blades, and is not easy to be drawn outward, thereby ensuring the stability of the lifting. Correspondingly, an anti-collision rubber seat 231 is provided on the L-shaped bracket body 23, which can form a support for the blades.

[0068] At the same time, the auxiliary swing arm 27 is also provided with an EPDM rubber surface for anti-slip and safety.

[0069] The hoist is also integrated with a cable wind system 100, including a cable wind winch, a cable wind rope, and a cable wind rope guide device, which is set on the hoist frame and points to the rear end (opposite to the C-shaped clamping port).

[0070] The windlass is controlled to maintain the spreader's attitude and angle. The windlass is rooted at the tail end of the crane's turntable and rotates along with the blades, spreader, and boom.

[0071] The cable wind winches in the cable wind system can be operated independently or automatically linked and controlled.

[0072] As an intelligent controlled spreader, this crane integrates hydraulic system, electrical system, power system and safety protection system on the hanging frame.

[0073] Wherein, the hydraulic system includes a main control electro-hydraulic system and an emergency electro-hydraulic control system;

[0074] The power system includes a generator and a battery pack;

[0075] The safety protection system includes a weighing sensor provided on the sling and a guardrail provided on the sling frame;

[0076] The electrical system includes a flat panel controller for secondary spreader operation, parameter setting, parameter display, and video monitoring;

[0077] Backup remote control, used for uncoupling operation after the main control system fails;

[0078] Video monitoring system for monitoring clamping points, visual assistance for spreader control during unhooking, and video storage;

[0079] Wireless system for monitoring data exchange between the tablet controller and the video surveillance system;

[0080] Hydraulic oil tank temperature control system, used for high temperature alarm and low temperature preheating;

[0081] Cabinet constant temperature system, used to control the internal environment temperature of the cabinet;

[0082] Hoisting data storage system, used to record all parameter data of the control main board (PLC) when the hoist is working;

[0083] Multiple sets of load measuring equipment for load detection of slings and safe lifting;

[0084] Multiple sets of auxiliary measuring equipment for controlling the lifting parameters of slings.

[0085] The adaptability and versatility of the spreader are further explained. The electro-hydraulic control system (main control and emergency electro-hydraulic control system) is designed to meet the versatility under certain conditions in the future. The electro-hydraulic control system has reserved function expansion interfaces. According to needs, the spreader can be upgraded and modified in the future by simply replacing the actuators (hydraulic cylinders), generators, battery packs, etc., without the need to replace the main control components (PLC, etc.).

[0086] Mechanical parts can be adapted to blades of different specifications by simply replacing the inclination adjustment block, the height adjustment block, and the total stabilizing link of the upper clamping mechanism of the L-shaped bracket body 23 .

[0087] In the design of the sling for this solution, the strength of the mechanical system is designed to meet the requirements of blades within 65 tons, and the maximum thickness of the blades lying flat is ≤3 meters.

[0088] In addition, the C-shaped clamping end is made into a split structure, which can reserve an interface for the adaptation needs of extra-wide blades in the future.

[0089] In terms of safety design, a main and auxiliary system is adopted. When the main electro-hydraulic control system fails, the emergency system will be activated to temporarily replace the main control system.

[0090] The main control electro-hydraulic system is powered by a generator with a 195-liter fuel tank, which can work continuously for 10 hours. The emergency electro-hydraulic control system is powered by a UPS battery pack, which can sustain normal lifting work for about 2 hours.

[0091] In the hydraulic system, the hydraulic system provides power for each actuator. The main hydraulic device is powered by a diesel generator. The system uses dual pumps, which can be single-acting or linked, and has redundancy function.

[0092] The emergency hydraulic system uses a DC pump unit powered by a battery pack to ensure that no safety accidents caused by diesel failure will occur.

[0093] In terms of safety control of the hydraulic system, the hydraulic system can control and accurately feedback the clamping force of the blades, and the clamping force is monitored by pressure sensors or torque transmitters to ensure that the blades are not clamped.

[0094] At the same time, the hydraulic system is equipped with a cooling system and a heating system. The temperature is monitored by sensors and fed back to the electrical control system to achieve real-time monitoring of temperature data, thereby ensuring that its temperature is under control.

[0095] The electrical control system is powered by a generator or battery pack and includes an electrical control cabinet, PLC, low-voltage components, switching power supplies, sensors, relays, and electromagnetic induction switches. The electrical control cabinet has an IP56 protection level, and the main controller is a compact embedded controller that receives remote control commands from the ground and collects feedback signals from all actuators to automatically or manually control the various actuators of the spreader.

[0096] It also includes a set of main control remote controller, preferably a tablet computer, for spreader operation and parameter display; a set of backup remote controller for unhooking operation after the main control system fails;

[0097] The monitoring system monitors the working status of each actuator through the sensors of each actuator and feeds back the information to the control module in the electrical system;

[0098] A set of high-resolution cameras, which are wirelessly transmitted to a tablet computer, is used for monitoring the clamping point and visually assisting the control of the spreader during unhooking, and has a video storage function.

[0099] Further explanation based on the operation and control mechanism of this solution:

[0100] S1. The blades are placed horizontally on a transport rack or storage rack;

[0101] S2. Adjust the level of the empty spreader using the remote control according to the level data of the empty spreader fed back by the level sensor;

[0102] S3, adjusting the two blade clamping cylinders 21 to the cylinder retraction limit through the remote control system to make maximum clamping space;

[0103] S4. Operate the crane to move the spreader to the side of the blade. Use the monitoring camera located behind the C-clamp to check the relative position of the spreader and the blade on a tablet computer to ensure the accuracy of the clamping position.

[0104] S5. Under the constant tension of the cable wind system, the spreader always maintains a balanced posture in the horizontal direction. The spreader is moved horizontally, and the C-shaped mouth is clamped into the blade. The anti-collision rubber seat is installed on the rear beam of the C-shaped frame, which can play a role in translation limit and protect the blade from being damaged.

[0105] S7. Slowly lift the spreader and use the monitoring camera to observe that the lower composite swing arm and the auxiliary swing arm gradually fit the bottom surface of the blade. Remotely operate the blade clamping cylinder to extend and press down to clamp the blade.

[0106] S8. The lifting device clamps the blade and lifts it to the hub. The blade is installed by remotely controlling the extension and retraction of the pitch cylinder and tilt cylinder (turning gear position).

[0107] S9. After the blades are installed, the clamping cylinder 21 is retracted to the limit position (maximum opening and closing position) by remote control, and the spreader is laterally moved out of the blade and lowered to the installation platform surface.

[0108] In summary, this solution positions the tube body of the feeding bag, drives the rotation of the applicator head through a motor, and applies silicone oil inside the tube body to ensure the sealing between the cover and the tube body, so that the silicone oil application can be automated, thereby improving production efficiency and reducing production costs.

[0109] The wind turbine blade hanger provided by this solution can adjust the tilt angle of the blade by ±5° in the length direction, and can also achieve 0~+10° pitch adjustment with the blade, solving the problem of inaccurate lateral center of gravity and difficulty in accurately clamping the blade when the blade leaves the factory.

[0110] The wind turbine blade hoist provided by this solution ensures that the blade does not slip during the hoisting process through the friction between the rubber parts and the blade surface after clamping. The maximum clamping pressure acting on the blade surface is ≤0.5Mpa, which ensures the integrity of the blade and is not easily damaged. In addition, the blade shape can be changed by moving the position and inclination adjustment block of the lower composite swing arm.

[0111] The fan blade hanger control system provided by this solution is centralized on the hanging frame, which is convenient for transportation and simple for maintenance.

[0112] The wind turbine blade hanger provided by this solution adopts a straight-line clamping method in the clamping mechanism. The upper and lower composite swing arms adopt a block-type swing adaptive mechanism, which has the function of adaptively fitting the blade surface to ensure clamping stability. There is no need to replace the upper and lower composite swing arms for different blades.

[0113] The wind turbine blade hoist provided in this solution uses a backup hydraulic and power system, combined with a monitoring camera system, to further ensure work safety.

[0114] The above embodiments are intended only to illustrate the technical concepts and features of this solution. Their purpose is to enable those familiar with the art to understand the content of this solution and implement it accordingly. They are not intended to limit the scope of protection of this solution. Any equivalent transformations or modifications based on the spirit and essence of this solution shall be included in the scope of protection of this solution.

[0115] In the description of this solution, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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, or it can be the internal connection of two components.

[0116] For ordinary technicians in this field, the specific meanings of the above terms in this solution can be understood according to specific circumstances.

[0117] It should be understood that the above-mentioned embodiments are merely illustrative and not restrictive. Without departing from the basic principles of this solution, various obvious or equivalent modifications or substitutions that can be made by technicians in this field to the above details will be included in the scope of the claims of this solution.

Claims

1. A wind turbine blade hanger, comprising a hanging frame (1) and C-shaped clamping mechanisms (2) symmetrically arranged on both sides thereof, and also comprising a hanging arm (3) arranged at the center of the hanging frame (1), characterized in that: It also includes a pitch structure (4) symmetrically arranged on both sides of the hanging frame (1), the C-shaped clamping mechanism (2) is a clamping structure with upper side movable clamping and lower side adjustable positioning, including an upper clamping mechanism and a lower bracket mechanism, and the clamping position is a straight-line composite structure, the upper clamping mechanism is arranged through the gantry (11) on the hanging frame (1), and is hinged to the lower edge connection end (12) of the hanging frame (1) through a stabilizing link (5) to form a triangular mechanism; the lower bracket mechanism is fixed to the lower edge connection end (12), and the upper clamping mechanism, the lower bracket mechanism and the part acting on the blade are all movable clamping ends; The pitch structure (4) comprises a pitch cylinder (41) and a counterweight cantilever (42) hinged on the hanging frame (1); the counterweight cantilever (42) is an L-shaped cantilever, one end of which is hinged to the hanging frame (1) and is hinged to the output end of the pitch cylinder (41); and the other end is provided with a counterweight block (43); the pitch cylinder (41) controls the counterweight block (43) to rotate at an angle greater than 90°; The upper clamping mechanism comprises a blade clamping oil cylinder (21), the upper end of which is hinged to the gantry (11), the lower output end of which is hinged to the stabilizing link (5), and an upper composite rocking arm (22), which is hinged to the stabilizing link (5) and has a clamping surface facing downward; The lower bracket mechanism comprises an L-shaped bracket body (23), one side of which is fixed to the lower edge connection end (12), and the other side of which is provided with a lower composite swing arm (24), with the clamping surface facing upwards; The lower composite swing arm (24) is hinged to a main support block (251) on a transverse adjustment seat (25), the transverse adjustment seat (25) is fixed to an inclination adjustment block (26), the inclination adjustment block (26) is fixed to the L-shaped bracket body (23), and an auxiliary swing arm (27) is further provided at the outer end of the L-shaped bracket body (23).

2. The wind turbine blade hanger according to claim 1, characterized in that: The auxiliary swing arm (27) is hinged to the auxiliary connecting end (28), and the auxiliary connecting end (28) is fixed to the L-shaped bracket body (23) through a height adjustment block (29) and an inclined connecting arm (210) connected in sequence, so that the auxiliary swing arm (27) is tilted inward.

3. The wind turbine blade hanger according to claim 2, characterized in that: The upper composite rocking arm (22) and the lower composite rocking arm (24) have the same structural form, including a first rocking arm (61), a second rocking arm (62) and a clamping workpiece (63) connected in sequence, wherein the center position of the second rocking arm (62) is hinged to the two ends of the first rocking arm (61), and the clamping workpiece (63) is arranged at the two ends of the second rocking arm (62) through a universal ball joint (64).

4. The wind turbine blade hanger according to claim 3, characterized in that: An anti-collision rubber seat (231) is provided on the L-shaped bracket body (23), and an EPDM rubber surface is provided on the clamping workpiece (63) and the auxiliary swing arm (27).

5. The wind turbine blade hanger according to claim 1, characterized in that: The boom (3) is hinged to the hanging frame (1), and a tilting oil cylinder (7) is hinged on the hanging frame (1) to act on the boom (3), and a rotating hanging block (31) is provided on the top of the boom (3).

6. A control system for controlling the wind turbine blade hanger according to any one of claims 1 to 5, characterized in that: Including hydraulic system, electrical system, power system and safety protection system; The hydraulic system includes a main control electro-hydraulic system and an emergency electro-hydraulic control system; The power system includes a generator and a battery pack; The safety protection system includes a weighing sensor provided on the sling and a guardrail provided on the sling frame; The electrical system includes a flat panel controller for secondary spreader operation, parameter setting, parameter display, and video monitoring; Backup remote control, used for uncoupling operation after the main control system fails; Video monitoring system for monitoring clamping points, visual assistance for spreader control during unhooking, and video storage; Wireless system for monitoring data exchange between the tablet controller and the video surveillance system; Hydraulic oil tank temperature control system, used for high temperature alarm and low temperature preheating; Cabinet constant temperature system, used to control the internal environment temperature of the cabinet; Hoisting data storage system, used to record all parameter data of the control mainboard when the hoist is working; Multiple sets of load measuring equipment for load detection of slings and safe lifting; Multiple sets of auxiliary measuring equipment for controlling the lifting parameters of slings.

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