A wind turbine single blade large angle installation hanger and method

Abstract

The present invention relates to a wind turbine single blade large-angle installation hanger and method, the hanger includes a hanger rod, which is provided with a strip hole; a main beam is provided with a main beam slot, the main beam is hinged to the hanger rod, and the main beam slot and the strip hole are staggered; a slewing mechanism includes a linear drive component, a hanger rod slider, a main beam slider and a pin shaft, the linear drive component is arranged on the main beam, the hanger rod slider, the main beam slider and the moving end of the linear drive component are coaxially connected to the pin shaft, the hanger rod slider is slidably connected to the strip hole, and the main beam slider is slidably connected to the main beam slot; a claw arm is used to clamp the blade, and the claw arm is rotatably connected to the main beam; a pitch mechanism is connected to the main beam and the claw arm. The present invention forms a connecting rod slider mechanism through the linear drive component, the pin shaft, the hanger rod slider, the strip hole, the main beam slider and the main beam slot, so that the linear drive component arranged on the main beam forms a kinematic pair with the hanger rod and the main beam at the same time, and the required force is small. The connecting rod slider mechanism can select a single small driving force linear drive component.

Description

Technical Field

[0001] The invention relates to the field of wind power installation, and in particular to a large-angle installation hanger and method for a single-blade wind power plant. Background Art

[0002] The traditional installation method of wind turbine blades generally adopts the impeller installation method, that is, the hub and three blades are assembled into an impeller at a low position on the ground, and then the whole is lifted to the height of the nacelle for docking and installation with the nacelle.

[0003] However, as the competition in the wind power industry intensifies, in order to reduce the cost of electricity, the capacity and wind sweeping area of ​​wind turbines are increasing at an increasingly rapid rate, and the length and weight of wind turbine blades are also increasing sharply. This makes the weight of the impeller exceed the lifting capacity of existing cranes, and the cost of upgrading cranes with stronger capabilities is huge and uneconomical.

[0004] In addition, in order to reduce the cost per kilowatt-hour, the wind turbine installation cycle is increasingly expected to be compressed, which inevitably requires improving installation efficiency and extending the installation window time by increasing the wind speed that the installation can adapt to.

[0005] However, the traditional impeller installation efficiency is slow and the wind speed adaptation is low. All these make the traditional impeller installation method increasingly difficult to adapt to the technical development trend of wind power.

[0006] In this context, the single-blade installation technology using a single-blade hanger can adapt well to the new requirements. By installing the wind turbine hub and blades separately, the weight of each hoisting is greatly reduced.

[0007] However, in order to realize the rotation of a single blade in the air, the existing single-blade hoist adopts a four-bar mechanism driven by a cylinder (such as CN109969933A). This form will cause the cylinder to be subjected to greater force during the rotation process, and will also cause great force on the connection parts between the main beam, the hanger and the cylinder. A large thrust cylinder or multiple small thrust cylinders are required to work together to drive it, which is not economical to implement and will also bring certain safety risks. In addition, when the existing single-blade hoist clamps the blade, all loads rely entirely on the ability of the cylinder on the back for opening and closing to withstand the bending moment when carrying the blade. As a result, a large thrust cylinder must be used when designing and selecting the cylinder to meet the design requirements, and maintenance and replacement are difficult. In particular, when lifting large-loaded blades, the bending moment borne by the opening and closing cylinder through the lever principle will also increase exponentially, which is low in economy and poses a safety hazard. Summary of the invention

[0008] The purpose of the present invention is to address the problem that the existing single-blade hangers in the prior art use a four-bar linkage driven by a cylinder to realize the rotation of a single blade in the air. This form will cause the cylinder to be subjected to greater force during the rotation process, and will also cause the connection parts between the main beam, the hanger and the cylinder to be subjected to greater force. A large thrust cylinder or multiple small thrust cylinders are required to work together to drive it, which is not economical to implement and will also bring certain safety risks. A wind turbine single-blade large-angle installation hanger and method are provided.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is:

[0010] A large-angle installation hanger for a single wind turbine blade, comprising:

[0011] A suspension rod having strip holes along its length;

[0012] A main beam, with a main beam slide groove along its length direction, the main beam is hinged to the suspension rod, and the main beam slide groove and the strip-shaped holes are staggered;

[0013] The slewing mechanism comprises a linear driving component, a suspension rod slider, a main beam slider and a pin shaft, wherein the linear driving component is arranged on the main beam, the suspension rod slider, the main beam slider and the moving end of the linear driving component are coaxially rotatably connected to the pin shaft, the suspension rod slider is slidably connected to the strip hole, and the main beam slider is slidably connected to the main beam slide groove;

[0014] A claw arm, used for clamping a blade, wherein the claw arm is rotatably connected to the main beam;

[0015] A pitch-changing mechanism is connected to the main beam and the claw arm, and the pitch-changing mechanism is used to drive the claw arm to rotate around the main beam.

[0016] Among them, by setting the stroke range of the linear drive component, the rotation angle range of the suspension rod and the main beam can be adjusted, that is, the range of the blade installation angle can be adjusted.

[0017] By adopting the large-angle installation hanger for a single-blade wind turbine described in the present invention, a connecting rod slider mechanism is formed by the linear drive component, the pin shaft, the hanger slider, the strip hole, the main beam slider and the main beam slide groove, so that the linear drive component arranged on the main beam forms a kinematic pair with the hanger and the main beam at the same time; when the main beam slider moves in the main beam slide groove, it is mainly acted on by friction along the direction of the main beam slide groove, and is mainly acted on by the component force of the hanger slider in the direction along the normal direction of the main beam slide groove, and the force is relatively small; the hanger slider is installed in the strip hole, and is mainly acted on by the linear drive component when it reciprocates in the strip hole. The thrust and pull of the driving component are used to change the size of the rotation angle between the suspension rod and the main beam, thereby realizing the adjustment of the overall inclination angle of the installation hanger. Since the force required for rotation is relatively small, the connecting rod slider mechanism can select a single linear driving component with small driving force, which has good economy, reliability and safety. Through the rotation coordination of the suspension rod and the main beam, the angle of the blade in the vertical plane is changed, and through the coordination of the claw arm and the pitch mechanism, the rotation of the blade along its longitudinal axis is changed, so that the mounting hole on the blade can be accurately aligned with the mounting hole of the installed wind turbine hub. The installation hanger has a simple structure, is easy to use and has good effects.

[0018] Preferably, the linear drive component is a rotary oil cylinder, a rotary air cylinder, a screw system, a gear rack system or a sprocket chain system, the telescopic end of the rotary oil cylinder or the rotary air cylinder is rotatably connected to the pin shaft, and the moving parts of the screw system, the gear rack system or the sprocket chain system are connected to the pin shaft.

[0019] Wherein, the screw system includes a motor and a screw. When the motor is an ordinary motor, the motor is connected to a reducer, and the reducer is connected to a coupling. When the motor is a variable frequency motor, the motor is directly connected to a coupling, and the coupling is connected to the screw. The screw is threadedly connected to a screw nut. The screw nut serves as the moving part, that is, the pin is rotatably connected to the screw nut. The screw can be a ball screw, and the motor can be a servo motor. In another way, the pin is directly used as the moving part, a threaded through hole is arranged radially along the pin, the screw is threadedly connected to the pin, and the rotation of the screw causes the pin to move along the screw.

[0020] The gear rack system includes a gear and a rack meshing with the gear, and a motor. When the motor is a common motor, the motor is connected to a reducer, and the reducer is connected to a coupling. When the motor is a variable frequency motor, the motor is directly connected to a coupling, and the coupling is connected to the shaft of the gear. The gear drives the rack to move, and the rack is connected to the moving part. The motor can be a servo motor.

[0021] The sprocket chain system includes a sprocket, a chain matched therewith, and a motor. When the motor is an ordinary motor, the motor is connected to a reducer, and the reducer is connected to a coupling. When the motor is a variable frequency motor, the motor is directly connected to a coupling, and the coupling is connected to the shaft of the sprocket. The sprocket drives the chain to move, and the chain is directly connected to the pin shaft. The motor can be a servo motor.

[0022] Preferably, a rigging connection hole is provided at the top of the boom, and a first angle α is formed between a line connecting a hinge point between the main beam and the boom and the rigging connection hole and an axis of the strip hole, and an angle range of α is 5°-45°. The rigging connection hole is used to connect the sling of the lifting equipment.

[0023] By adopting this structure, by setting the axis of the strip hole and the line connecting the two hinge points on the hanger to α, the stroke of the reciprocating motion of the pin shaft along the straight line can be changed to the shortest, thereby reducing the moving distance of the moving end of the linear drive component, and correspondingly reducing the size of the main beam slide groove and the main beam, making the structure of the wind turbine single-blade large-angle installation hanger more compact, achieving the best combination of force and stroke.

[0024] Further preferably, the angle range of α is 10°-20°.

[0025] More preferably, the angle range of α is 15°-20°.

[0026] Preferably, the main beam includes a cross beam and a supporting beam connected thereto, the main beam slide groove is arranged between the cross beam and the supporting beam, the cross beam is hinged to the boom, the linear drive component is arranged on the cross beam, the claw arm is rotatably connected to the cross beam, and the pitch mechanism is connected to the cross beam and the claw arm.

[0027] Further preferably, the bottom end of the suspension rod is hinged to the middle part of the beam.

[0028] Further preferably, the support beam is connected to the top of the cross beam, the linear drive component is connected to the top of the cross beam, and an accommodating space is provided on the support beam, and the linear drive component and / or its moving end can be arranged in the accommodating space.

[0029] Further preferably, both ends of the crossbeam are respectively connected with wind cable arms.

[0030] Further preferably, a suspension rod connecting hole is provided on the cross beam, and the suspension rod is hinged to the cross beam through the suspension rod connecting hole.

[0031] Further preferably, a claw arm connecting hole is provided on the cross beam, and the claw arm is rotatably connected to the cross beam through the claw arm connecting hole.

[0032] Further preferably, the claw arm connecting hole is arranged on the top surface of the beam.

[0033] Preferably, the claw arm includes an upper arm and a lower arm hinged thereto, the upper arm is rotatably connected to the main beam, a clamping space is provided between the upper arm and the lower arm, the clamping space is used to place the blade, and the pitch mechanism is connected to the main beam and the upper arm.

[0034] Further preferably, a main beam connecting hole is provided on the upper arm, and the upper arm is rotatably connected to the main beam through the main beam connecting hole.

[0035] Further preferably, the upper arm and the lower arm form a C-shaped arm when they are rotated and closed.

[0036] Further preferably, the main beam connecting hole is arranged on the inner top surface of the C-shaped arm, that is, the C-shaped arm is hung on the main beam.

[0037] Preferably, the large-angle installation hanger for single-blade wind turbines further comprises an opening and closing mechanism, which connects the upper arm and the lower arm, and is used to drive the lower arm to rotate around the upper arm and to limit the lower arm.

[0038] The cam is connected to the bottom end of the support rod and the bottom end of the support rod is connected to the bottom end of the support rod, and the cam is connected to the bottom end of the support rod by the spring.

[0039] If the angle between the upper connecting rod and the lower connecting rod is exactly 180°, the limit block is not subjected to force, and the force is transmitted to the C-shaped arm along the connecting rod. However, this state is unstable. Once the movable hinge between the connecting rods moves, the lower arm will rotate around the upper arm and lose its bearing capacity. Therefore, an angle β is set between the upper connecting rod and the lower connecting rod. At this time, when the C-shaped arm is under load, the movable hinge has a force toward the C-shaped arm side, and the position is limited by the limit block, and the movable hinge cannot move. However, due to the angle restriction, the movable hinge cannot move to another direction, thus forming a self-locking state.

[0040] With this structure, the opening and closing cylinder is extended, and the upper connecting rod pushes the lower connecting rod to rotate the lower arm to form the clamping space. After the upper connecting rod or the lower connecting rod abuts the limit block, the lower arm stops rotating, and then the blade is fixed in the clamping space. The load of the blade is transmitted to the lower connecting rod and the upper connecting rod through the lower arm, so that the second angle between the lower connecting rod and the upper connecting rod tends to decrease. However, due to the abutment of the limit block, the reduction of the second angle between the lower connecting rod and the upper connecting rod is limited, and the load is transmitted to the entire claw arm by the limit block, and a mechanical self-locking structure is formed. At this time, the opening and closing cylinder is not subjected to force. When the blade is detached and the load is released, the opening and closing cylinder only needs a small force to pull the lower arm to rotate. Therefore, the opening and closing cylinder can select a small thrust cylinder with good economy, and the mechanical self-locking structure also has good safety.

[0041] Further preferably, the limit block is connected to the upper arm, the lower arm, the upper connecting rod or the lower connecting rod.

[0042] Further preferably, the upper connecting rod is hinged to the upper arm through an upper arm ear seat.

[0043] Further preferably, the lower connecting rod is hinged to the lower arm through a lower arm ear seat.

[0044] Further preferably, the opening and closing cylinder is hinged to the upper arm through a cylinder ear seat.

[0045] Further preferably, the hinge point between the telescopic end of the opening and closing oil cylinder and the upper connecting rod and the limit block are respectively located on two opposite sides of the lower connecting rod.

[0046] Preferably, the large-angle installation hanger for single-blade wind turbines also includes a clamping mechanism, which includes an upper clamping plate, a lower clamping plate and a telescopic arm, the lower clamping plate is connected to the lower arm, the telescopic arm is connected to the upper arm, the bottom of the telescopic arm is connected to the upper clamping plate, the upper clamping plate and the lower clamping plate are arranged opposite to each other and are respectively located at the upper and lower parts of the clamping space.

[0047] Further preferably, the upper clamping plate and the telescopic arm are connected via a universal rotation.

[0048] Further preferably, the upper clamping plate and the telescopic arm are connected via a cross joint or a ball joint.

[0049] Further preferably, a clamping cylinder is provided on the upper arm, and the clamping cylinder drives the telescopic arm to rise and fall, controls the distance between the upper clamping plate and the lower clamping plate, so that the upper clamping plate and the lower clamping plate generate a pressing force on the surface of the blade, thereby clamping the blade.

[0050] Further preferably, a locking device is provided on the upper arm, and the locking device is sleeved outside the telescopic arm, and the locking device can lock the telescopic arm.

[0051] Further preferably, a pad is provided on one side of the clamping space, the pad is connected to the upper arm, and the pad is used to support the back of the blade.

[0052] Further preferably, the pad is detachably connected to the upper arm, and the thickness of the pad can be adjusted to accommodate blades of different sizes.

[0053] Preferably, the pitch mechanism comprises a pitch cylinder, and two ends of the pitch cylinder are respectively hinged to the main beam and the claw arm.

[0054] Further preferably, the pitch mechanism also includes a claw arm ear plate and a main beam ear plate, the claw arm ear plate is connected to the claw arm, the main beam ear plate is connected to the main beam, the pitch cylinder is hinged to the claw arm through the claw arm ear plate, and the pitch cylinder is hinged to the main beam through the main beam ear plate.

[0055] Preferably, the wind turbine single-blade large-angle installation hanger also includes a cable wind mechanism, which includes a horizontal cable wind winch, a vertical cable wind winch and a guide wheel. The horizontal cable wind winch and the vertical cable wind winch are both arranged on the main beam, and the guide wheel is arranged at the end of the main beam. The horizontal cable wind winch is provided with a horizontal cable wind rope, and the vertical cable wind winch is provided with a vertical cable wind rope. The horizontal cable wind rope and the vertical cable wind rope are respectively guided by one of the guide wheels.

[0056] Preferably, the claw arm is connected to an equipment platform, and a power device and a control device are arranged on the equipment platform.

[0057] The present invention also provides a method for installing a single wind turbine blade at a large angle, using the large-angle installation hanger for a single wind turbine blade as described in any one of the above, the method comprising the following steps:

[0058] The lifting equipment is connected to the boom, and the claw arm clamps and fixes the blade;

[0059] Lifting the installation sling and the blade into the air;

[0060] The moving end of the linear drive component works to move the suspension rod slider in the strip hole and the main beam slider in the main beam slide groove, forcing the main beam to rotate around the suspension rod, that is, driving the blade to rotate in the vertical plane;

[0061] The pitch mechanism drives the claw arm to rotate around the main beam, that is, drives the blade to pitch in the longitudinal axial direction of the blade, so that the blade is aligned with the bolt hole of the fan hub;

[0062] The blades and the fan hub are connected by bolts.

[0063] By adopting the large-angle installation method of a single wind turbine blade described in the present invention, a connecting rod slider mechanism is formed by the linear drive component, the pin shaft, the suspension rod slider, the strip hole, the main beam slider and the main beam slide groove, so that the linear drive component arranged on the main beam forms a kinematic pair with the suspension rod and the main beam at the same time; when the main beam slider moves in the main beam slide groove, it is mainly acted on by friction along the direction of the main beam slide groove, and is mainly acted on by the component force of the suspension rod slider in this direction along the normal direction of the main beam slide groove, and the force is relatively small; the suspension rod slider is installed in the strip hole, and is mainly acted on by the linear drive component when it reciprocates in the strip hole. The thrust and pull of the driving component are used to change the size of the rotation angle between the suspension rod and the main beam, thereby realizing the adjustment of the overall inclination angle of the installation hanger. Since the force required for rotation is relatively small, the connecting rod slider mechanism can select a single linear driving component with small driving force, which has good economy, reliability and safety. Through the rotation coordination of the suspension rod and the main beam, the angle of the blade in the vertical plane is changed, and through the coordination of the claw arm and the pitch mechanism, the rotation of the blade along its longitudinal axis is changed, so that the mounting hole on the blade can be accurately aligned with the mounting hole of the installed wind turbine hub. The installation method has simple steps, easy operation and good effect.

[0064] The present invention also provides a wind turbine turning method, using the large-angle installation method of a wind turbine single blade as described above, and further comprising:

[0065] After the blades are connected to the fan hub, the lifting equipment is used to lift the installation sling, and the movement end of the linear drive component is controlled to move, so that the center of gravity of the installation sling and the lifting point where the lifting equipment is connected to the installation sling are on the same vertical line, which can drive the blades and the fan hub to rotate around the fan hub rotation axis and turn the fan to a desired angle.

[0066] By adopting the wind turbine turning method described in the present invention, the installed single blade can be rotated around the rotation axis of the wind turbine hub only through the cooperation of the above-mentioned wind turbine single-blade large-angle installation hanger and the lifting equipment. No additional turning tooling is required, which saves the cost and the installation and disassembly time of the turning tooling, and shortens the overall wind turbine installation time. The method has simple steps, easy operation and good effect.

[0067] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0068] 1. A large-angle installation hanger for a single wind turbine blade described in the present invention forms a connecting rod slider mechanism through the linear drive component, the pin shaft, the suspension rod slider, the strip hole, the main beam slider and the main beam slide groove, so that the linear drive component arranged on the main beam forms a kinematic pair with the suspension rod and the main beam at the same time; when the main beam slider moves in the main beam slide groove, it is mainly acted on by friction along the direction of the main beam slide groove, and is mainly acted on by the component force of the suspension rod slider in the direction along the normal direction of the main beam slide groove, and the force is relatively small; the suspension rod slider is installed in the strip hole, and is mainly acted on by the linear drive component when it reciprocates in the strip hole. The thrust and pull of the driving component are used to change the size of the rotation angle between the suspension rod and the main beam, so as to adjust the overall inclination angle of the installation hanger. Since the force required for rotation is small, the connecting rod slider mechanism can select a single linear driving component with small driving force, which has good economy, reliability and safety. The angle of the blade in the vertical plane is changed by the rotation cooperation between the suspension rod and the main beam, and the rotation of the blade along its longitudinal axis is changed by the cooperation between the claw arm and the pitch mechanism, so that the mounting hole on the blade can be accurately aligned with the mounting hole of the installed fan hub. The installation hanger has a simple structure, is easy to use and has good effect.

[0069] 2. A preferred large-angle installation hanger for a single wind turbine blade of the present invention can change the stroke of the reciprocating motion of the pin along a straight line to the shortest by setting the axis of the strip hole and the connecting line of the two hinge points on the hanger rod to α, thereby reducing the moving distance of the moving end of the linear drive component, and correspondingly reducing the size of the main beam slideway and the main beam, so that the structure of the large-angle installation hanger for a single wind turbine blade is more compact, achieving the best combination of force and stroke;

[0070] 3. A preferred large-angle installation hanger for a single wind turbine blade is provided in the present invention, wherein the opening and closing oil cylinder is extended, and the upper connecting rod pushes the lower connecting rod to rotate the lower arm to form the clamping space. After the upper connecting rod or the lower connecting rod abuts the limit block, the lower arm stops rotating, and then fixes the blade in the clamping space, and the load of the blade is transmitted to the lower connecting rod and the upper connecting rod through the lower arm, so that the second angle between the lower connecting rod and the upper connecting rod has a tendency to decrease. However, due to the abutment of the limit block, the reduction of the second angle between the lower connecting rod and the upper connecting rod is limited, and the load is transmitted to the entire claw arm by the limit block, and a mechanical self-locking structure is formed. At this time, the opening and closing oil cylinder is not subjected to force. When the blade is detached and the load is released, the opening and closing oil cylinder only needs a small force to pull the lower arm to rotate. Therefore, the opening and closing oil cylinder can select a small thrust oil cylinder with good economy, and the mechanical self-locking structure also has good safety.

[0071] 4. A large-angle installation method for a single wind turbine blade described in the present invention forms a connecting rod slider mechanism through the linear drive component, the pin shaft, the suspension rod slider, the strip hole, the main beam slider and the main beam slide groove, so that the linear drive component arranged on the main beam forms a kinematic pair with the suspension rod and the main beam at the same time; when the main beam slider moves in the main beam slide groove, it is mainly acted on by friction along the direction of the main beam slide groove, and is mainly acted on by the component force of the suspension rod slider in the direction normal to the main beam slide groove, and the force is relatively small; the suspension rod slider is installed in the strip hole, and is mainly acted on by the linear drive component when it reciprocates in the strip hole The thrust and pull of the driving component are used to change the size of the rotation angle between the suspension rod and the main beam, so as to adjust the overall inclination angle of the installation hanger. Since the force required for rotation is small, the connecting rod slider mechanism can select a single linear driving component with small driving force, which has good economy, reliability and safety. The angle of the blade in the vertical plane is changed by the rotation cooperation between the suspension rod and the main beam, and the rotation of the blade along its longitudinal axis is changed by the cooperation between the claw arm and the pitch mechanism, so that the mounting hole on the blade can be accurately aligned with the mounting hole of the installed fan hub. The installation method has simple steps, easy operation and good effect.

[0072] 5. The wind turbine turning method described in the present invention can rotate the installed single blade around the rotation axis of the wind turbine hub only through the cooperation of the above-mentioned wind turbine single-blade large-angle installation hanger and the lifting equipment, without the need for additional turning tooling, thus saving the cost and the installation and disassembly time of the turning tooling, and shortening the overall wind turbine installation time. The method has simple steps, easy operation and good effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] Figure 1This is a schematic diagram of the three-dimensional structure of the large-angle installation hanger for a single wind turbine blade (rotating cylinder method);

[0074] Figure 2 This is a schematic diagram of the main structure of the wind turbine single blade large-angle installation hanger (rotating cylinder method);

[0075] Figure 3 This is a top view of the structure of a wind turbine single blade large-angle installation hanger (rotating cylinder method);

[0076] Figure 4 A schematic diagram of the three-dimensional structure of the main beam;

[0077] Figure 5 It is a three-dimensional structural schematic diagram of the rotary mechanism;

[0078] Figure 6 It is a schematic diagram of the three-dimensional structure of the claw arm and the clamping mechanism;

[0079] Figure 7 A schematic diagram of a blade being clamped by a wind turbine single blade large-angle installation hanger;

[0080] Figure 8 Schematic diagram of the installation of a sling for a single wind turbine blade with a large angle when the blade is detached;

[0081] Fig. 9 This is a schematic diagram of the large-angle installation hanger of a single wind turbine blade when it is rotated to +30°;

[0082] Fig.10 for Fig. 9 Enlarged view of part A in the middle;

[0083] Fig.11 This is a schematic diagram of the large-angle installation hanger of a single wind turbine blade when it is rotated to -60°;

[0084] Fig.12 is a schematic diagram of the bending angle of the boom;

[0085] Fig.13 This is a schematic diagram of the main structure of the large-angle installation hanger for a single wind turbine blade (screw system method).

[0086] Markings in the figure: 100-suspender rod, 101-strip hole, 102-rigging connection hole, 200-main beam, 201-main beam slide, 202-cross beam, 203-support beam, 204-accommodation space, 205-cable wind arm, 206-suspender rod connection hole, 207-claw arm connection hole, 300-slewing mechanism, 301-slewing cylinder, 302-suspender rod slider, 303-main beam slider, 304-pin shaft, 305-mounting ear seat, 306-screw, 307-motor, 308-mounting seat, 400-claw arm, 401-upper arm, 402-lower arm, 403-main beam connection hole, 500-pitch mechanism, 501-pitch cylinder , 502-claw arm ear plate, 503-main beam ear plate, 600-opening and closing mechanism, 601-opening and closing cylinder, 602-cylinder ear seat, 603-lower arm ear seat, 604-lower connecting rod, 605-upper connecting rod, 606-upper arm ear seat, 607-limiting block, 700-clamping mechanism, 701-lower splint, 702-upper splint, 703-telescopic arm, 704-locking device, 705-clamping cylinder, 706-pad, 800-cable wind mechanism, 801-horizontal cable wind winch, 802-vertical cable wind winch, 803-horizontal cable wind rope, 804-vertical cable wind rope, 805-guide wheel, 900-equipment platform, 901-blade. DETAILED DESCRIPTION

[0087] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0088] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0089] Example 1

[0090] like Figures 1 to 3 As shown, a large-angle installation hanger for a single-blade wind turbine described in the present invention includes a hanger 100, a main beam 200, a claw arm 400, a rotating mechanism 300, a pitch mechanism 500, an opening and closing mechanism 600, a clamping mechanism 700, a wind cable mechanism 800 and an equipment platform 900.

[0091] like Figures 1 to 3As shown, the boom 100 is hinged to the middle part of the main beam 200, and the slewing mechanism 300 is installed on the main beam 200 and forms a kinematic pair with the boom 100 and the main beam 200 at the same time. There are two claw arms 400, two pitch mechanisms 500, two opening and closing mechanisms 600, two clamping mechanisms 700, and two wind cable mechanisms 800. Each pitch mechanism 500, two opening and closing mechanisms 600, and two clamping mechanisms 700 are connected to a claw arm 400, and are respectively arranged on the main beam 200 and located on both sides of the boom 100. Two wind cable mechanisms 800 are also located on the main beam 200 and are respectively arranged on the outside of the claw arms 400. The equipment platform 900 is fixedly connected to the two claw arms 400 at the same time.

[0092] like Figures 1 to 3 As shown, the boom 100 is a forked structure, with two forked sides respectively placed on both sides of the main beam 200, the lower part of the forked side is hingedly connected to the middle part of the main beam 200, each forked side is provided with a strip hole 101, and the top of the boom 100 is provided with a rigging connection hole 102 for connecting the hoisting rigging of the lifting equipment, wherein the main view of the boom 100 is a boomerang shape, mainly considering the matching of the lifting point with the center of gravity of the entire sling and the blade 901, and reducing the size of the main beam slide 201 and the main beam 200, specifically, as shown in FIG. Fig.12 As shown, there is a first angle α between the line connecting the hinge point between the main beam 200 and the suspension rod 100 and the rigging connection hole 102 and the axis of the strip hole 101. The angle range of α is 5°-45°. In this embodiment, the preferred angle range of α is 10°-20°, and the optimal range is 15°-20°. The calculation formula of α is shown below.

[0093] α=|(|θ1|-|θ2|) / 2|

[0094] Among them, θ1 and θ2 are the angles between the line connecting the two hinge points on the hanger 100 and the central axis of the main beam 200 under the extension and contraction limit strokes of the linear drive component respectively. By setting the axis of the strip hole 101 and the line connecting the two hinge points on the hanger 100 to α, the stroke of the reciprocating motion of the pin shaft 304 along the straight line can be changed to the shortest, thereby reducing the moving distance of the moving end of the linear drive component, making the structure of the large-angle installation hanger of the single-blade wind turbine more compact, and achieving the best combination of force and stroke.

[0095] like Figure 4As shown, the main beam 200 is generally in the form of a long rod-shaped structure, with a crossbeam 202 in the middle, a support beam 203 connected to the top of the crossbeam 202, and two wind cable arms 205 respectively located at both ends of the crossbeam 202, and the wind cable arms 205 are a bent structure. A suspension rod connecting hole 206 connected to the suspension rod 100 is provided in the middle of the crossbeam 202, and claw arm connecting holes 207 connected to the claw arm 400 are provided at both ends. Preferably, the claw arm connecting hole 207 at each end is composed of two coaxial holes, but depending on the force conditions, the claw arm connecting hole 207 at each end may also be composed of only one hole. The support beam 203 is fixedly connected to the top of the crossbeam 202, and has a receiving space 204 that can accommodate a linear drive component. In this embodiment, the linear drive component adopts the following structure: Figure 3 The rotary cylinder 301 shown in the figure forms two main beam slots 201 between the lower part of the support beam 203 and the top surface of the cross beam 202, and the main beam slots 201 are located on both sides of the accommodating space 204. Preferably, the cable arm 205 is connected to the cross beam 202 using flange bolts, and can also be hinged or fixedly connected (such as welding) as appropriate.

[0096] like Figures 1 to 5 , Fig.10 As shown, the cylinder body of the rotary cylinder 301 of the rotary mechanism 300 is hinged on the main beam 200 using the mounting ear seat 305, and the boom slider 302, the main beam slider 303 and the telescopic end of the rotary cylinder 301 are installed together on the pin 304 and can rotate around the axis of the pin 304. The telescopic end of the rotary cylinder 301 is installed in the middle of the pin 304. The boom slider 302 is installed on the outermost edge of the pin 304 and placed in the strip hole 101 of the boom 100, which can be well matched with the strip hole 101 and slide in the length direction of the strip hole 101. The main beam slider 303 is located between the rotary cylinder 301 and the boom slider 302, and is placed in the main beam chute 201, which can be well matched with the main beam chute 201 and can slide in the main beam chute 201 in the length direction of the main beam 200. By means of the extension and retraction of the rotary cylinder 301, the main beam slider 303 and the boom slider 302 are driven to slide in the main beam slide groove 201 and the strip hole 101 respectively, so that the boom 100 and the main beam 200 rotate relative to each other, thereby driving the blade 901 to rotate.

[0097] like Figures 6 to 8 As shown, the claw arm 400 includes an upper arm 401 and a lower arm 402, which are in a C shape. The upper arm 401 is provided with a main beam connection hole 403 connected to the main beam 200, and the upper arm 401 is hingedly connected to the lower arm 402. Each set of lifting equipment includes two claw arms 400, both of which are hingedly connected to the main beam 200.

[0098] like Figures 6 to 8As shown, the claw arm ear plate 502 of each pitch mechanism 500 is fixedly connected to the upper arm 401, the main beam ear plate 503 is fixedly connected to the side of the main beam 200, and the two ends of the pitch cylinder 501 are respectively hingedly connected to the claw arm ear plate 502 and the main beam ear plate 503. Through the extension and retraction of the pitch cylinder 501, the claw arm 400 can be driven to rotate around the hinge point between it and the main beam 200, and then the blade 901 can be driven to rotate around its longitudinal axis direction, that is, to perform pitch movement.

[0099] like Figures 6 to 8 As shown, the cylinder ear seat 602 and the upper arm ear seat 606 of each opening and closing mechanism 600 are fixed to the back of the upper arm 401, the lower arm ear seat 603 is fixed to the back of the lower arm 402, the upper connecting rod 605 is hingedly connected to the upper arm ear seat 606, the lower connecting rod 604 is hingedly connected to the lower arm ear seat 603, the upper connecting rod 605 is also hingedly connected to the lower connecting rod 604, the cylinder barrel of the opening and closing cylinder 601 is hingedly connected to the cylinder ear seat 602, and the piston rod of the opening and closing cylinder 601 is hingedly connected to the upper connecting rod 605. Through the telescopic action of the opening and closing cylinder 601, the lower arm 402 can be driven to rotate around the hinge point between the upper arm 401 and the lower arm 402. A limit block 607 is set in the area between the upper arm 401, the lower arm 402, the lower connecting rod 604 and the upper connecting rod 605. In this embodiment, Figure 7 and Figure 8 The limit block 607 shown is connected to the upper arm 401. When the opening and closing cylinder 601 is extended to a certain length, the lower connecting rod 604 or the upper connecting rod 605 will lean against the limit block 607 and prevent the lower arm 402 from continuing to rotate. When the limit block 607 abuts against the lower connecting rod 604 or the upper connecting rod 605, the second angle β between the upper connecting rod 605 and the lower connecting rod 604 is located on the side opposite to the limit block 607, that is, the limit block 607 and the second angle β are respectively located on the opposite sides of the lower connecting rod 604, and the value of the second angle B is greater than 0° and less than 180°. After the lower connecting rod 604 rests against the limit block 607, when the opening and closing cylinder 601 does not apply a pulling force to the upper connecting rod 605, the lower arm 402 will be pressed downward by the blade 901, and the lower connecting rod 604 will rest closer to the limit block 607, thereby preventing the lower arm 402 from rotating around the hinge point between it and the upper arm 401, automatically forming a mechanical lock on the position of the lower arm 402.

[0100] In some specific implementations, the limit block 607 is connected to the lower arm 402 , and when the opening and closing cylinder 601 is extended to a certain length, the lower connecting rod 604 or the upper connecting rod 605 will lean against the limit block 607 .

[0101] In some specific implementations, the limit block 607 is connected to the upper connecting rod 605 , and when the opening and closing cylinder 601 is extended to a certain length, the upper arm 401 or the lower arm 402 will lean against the limit block 607 .

[0102] In some specific implementations, the limit block 607 is connected to the lower connecting rod 604 , and when the opening and closing cylinder 601 is extended to a certain length, the upper arm 401 or the lower arm 402 will lean against the limit block 607 .

[0103] In some specific embodiments, the limit block 607 is composed of two parts, namely, limit block one and limit block two. Limit block one is set on the upper arm 401 or the lower arm 402, and limit block two is set on the upper connecting rod 605 or the lower connecting rod 604. When the opening and closing cylinder 601 is extended to a certain length, limit block one is adapted to limit block two.

[0104] like Figures 6 to 8 As shown, the lower clamping plate 701 of each clamping mechanism 700 is connected to the lower arm 402, the upper clamping plate 702 is connected to the telescopic arm 703 through a ball joint or a cross joint, and the clamping cylinder 705 is connected to the upper arm 401 through a flange bolt. The telescopic arm 703 can be driven to move up and down by the extension and contraction of the clamping cylinder 705, thereby changing the distance between the upper clamping plate 702 and the lower clamping plate 701, so that the upper clamping plate 702 and the lower clamping plate 701 produce a pressing force on the surface of the blade 901, thereby clamping the blade 901. The pad 706 is arranged in the middle of the claw arm 400, and when clamping the blade 901, it can form a support for the back of the blade 901. By changing the thickness of the pad 706, it can adapt to different cross-sectional widths of the blade 901 within a certain range. The locker 704 is connected to the upper arm 401 and embraces the telescopic arm 703. When the locker 704 is opened, the telescopic arm 703 can move up and down freely. When the blade 901 is clamped, the locker 704 is closed, and the upper and lower positions of the telescopic arm 703 are locked, so that the upper clamping plate 702 and the lower clamping plate 701 can maintain a tight state against the surface of the blade 901 to prevent loosening.

[0105] like Figure 1 and Figure 2 As shown, each cable wind mechanism 800 includes a horizontal cable wind winch 801, a vertical cable wind winch 802, a horizontal cable wind rope 803, a vertical cable wind rope 804 and a guide wheel 805 arranged at the end of the cable wind arm 205. The horizontal cable wind winch 801 and the vertical cable wind winch 802 are both arranged on the main beam 200. As preferred, the horizontal cable wind winch 801 and the vertical cable wind winch 802 are both arranged on the top surface of the main beam 200. The horizontal cable wind winch 801 and the vertical cable wind winch 802 can also be arranged on other surfaces of the main beam 200, such as the side surface or the bottom surface. The disadvantage of being arranged on the side surface is that it may be easier to cause a tangled rope or fall, and being arranged on the bottom surface may be easier to cause a fall. In contrast, being arranged on the top surface of the main beam 200 is less likely to cause a tangled rope or fall, and is the safest. One end of the horizontal guy rope 803 and the vertical guy rope 804 are respectively wound around the horizontal guy winch 801 and the vertical guy winch 802, and the other end is fixedly connected to a crane or a suitable anchor point on the ground after passing around the guide wheel 805.

[0106] In order to prevent the sling and the blade 901 from swinging and rotating under the action of the ambient wind force, which would affect the safe docking between the blade 901 and the wind turbine hub, the horizontal wind rope 803 and the vertical wind rope 804 can be used to tighten the sling to a suitable tension value through the horizontal wind rope winch 801 and the vertical wind rope winch 802 at the same time, and then the retracted and extended lengths of the horizontal wind rope 803 and the vertical wind rope 804 are locked. When the sling tends to swing and rotate, the horizontal wind rope 803 or the vertical wind rope 804 automatically generates a return tension in the opposite direction to the sling, thereby preventing the sling and the blade 901 from swinging and rotating.

[0107] like Figures 1 to 3 , Fig. 9 , Fig.11 As shown, the equipment platform 900 is fixedly connected to the two claw arms 400. The equipment platform 900 is provided with power equipment, control equipment, etc.

[0108] By setting the stroke range of the rotary cylinder 301, the rotation angle range of the boom 100 and the main beam 200 can be adjusted, that is, the installation angle range of the blade 901 can be adjusted, such as Fig. 9 and Fig.11 As shown, in this embodiment, the adjustment range of the rotation angle of the suspension rod 100 and the main beam 200 is -60° to +30°.

[0109] The large-angle installation hanger for a single wind turbine blade described in this embodiment forms a connecting rod slider mechanism through a rotary cylinder 301, a pin shaft 304, a hanger slider 302, a strip hole 101, a main beam slider 303 and a main beam slide groove 201, so that the rotary cylinder 301 arranged on the main beam 200 forms a kinematic pair with the hanger 100 and the main beam 200 at the same time; when the main beam slider 303 moves in the main beam slide groove 201, it is mainly acted on by friction along the direction of the main beam slide groove 201, and is mainly acted on by the component force of the hanger slider 302 in the normal direction of the main beam slide groove 201, The force is small, the boom slider 302 is installed in the strip hole 101, and is mainly acted on by the thrust and pull of the rotary cylinder 301 when reciprocating along the strip hole 101, so as to change the rotation angle between the boom 100 and the main beam 200, thereby realizing the adjustment of the overall inclination angle of the installation hanger. Since the force required for rotation is small, the connecting rod slider mechanism can select a single small thrust cylinder, which has good economy, reliability and safety; through the rotation of the boom 100 and the main beam 200, the angle of the blade 901 in the vertical plane is changed, and the claw arm 400 and the pitch mechanism 50 0, change the blade 901 to rotate along its longitudinal axis, so that the mounting hole on the blade 901 can be accurately aligned with the mounting hole of the installed fan hub; by opening and closing the oil cylinder 601 to extend, the upper connecting rod 605 pushes the lower connecting rod 604 to rotate the lower arm 402 to form a clamping space, after the upper connecting rod 605 or the lower connecting rod 604 abuts the limit block 607, the lower arm 402 stops rotating, and then fixes the blade 901 in the clamping space, and the load of the blade 901 is transmitted to the lower connecting rod 604 and the upper connecting rod 605 through the lower arm 402, so that the space between the lower connecting rod 604 and the upper connecting rod 605 The angle tends to decrease, but due to the abutment of the limit block 607, the reduction of the angle between the lower connecting rod 604 and the upper connecting rod 605 is limited, and the load is transmitted to the entire claw arm 400 by the limit block 607, and a mechanical self-locking structure is formed. At this time, the opening and closing cylinder 601 is not subjected to force. When the blade 901 is disengaged and the load is released, the opening and closing cylinder 601 only needs a small force to pull the lower arm 402 to rotate. Therefore, the opening and closing cylinder 601 can choose a small thrust cylinder with good economy, and the mechanical self-locking structure also has good safety. The installation hanger has a simple structure, is easy to use, and has a good effect.

[0110] Example 2

[0111] The large-angle installation hanger for a single wind turbine blade described in the present invention is different from that in Example 1 in that, in this embodiment, the linear drive component uses a rotary cylinder to replace the rotary oil cylinder 301 (not shown), and the connection and arrangement of the rotary cylinder remain unchanged.

[0112] Example 3

[0113] like Fig.13As shown, a large-angle installation hanger for a single wind turbine blade described in the present invention is different from Example 1 in that, in this embodiment, the linear drive component adopts a screw system to replace the rotary cylinder 301 therein.

[0114] Specifically, the screw system includes a screw 306 and a driving component, and the driving component includes a motor 307 (in this embodiment, the motor 307 is an ordinary motor), a reducer and a coupling. The screw 306 is fixed to the top surface of the beam 202 through a mounting seat 308, and the driving component is also fixed to the top surface of the beam 202. The motor 307 is connected to the reducer, the reducer is connected to the coupling, the coupling is connected to the screw 306, and the screw 306 is threadedly connected to the screw nut. The screw nut serves as a moving part, that is, the pin 304 is rotatably connected to the screw nut. The screw 306 can use a ball screw, and the motor 307 can use a servo motor. A bearing is provided between the mounting seat 308 and the screw 306. In this embodiment, the motor 307 can also use a variable frequency motor. When a variable frequency motor is used, the reducer can be cancelled, and the motor 307 is directly connected to the coupling.

[0115] In another specific embodiment, the pin shaft 304 is directly used as a moving part, a threaded through hole is provided along the radial direction of the pin shaft 304, and the lead screw 306 is threadedly connected to the pin shaft 304. The rotation of the lead screw 306 causes the pin shaft 304 to move along the lead screw.

[0116] The motor 307 rotates to drive the lead screw 306 to rotate, and the lead screw 306 drives the moving part to move along the lead screw 306, thereby driving the pin shaft 304 to perform linear reciprocating motion.

[0117] Example 4

[0118] The large-angle installation hanger for a single wind turbine blade described in the present invention is different from that in Example 1 in that, in this embodiment, the linear drive component adopts a rack and pinion system to replace the rotary cylinder 301 (not shown).

[0119] Specifically, the rack and pinion system includes a gear and a rack meshing therewith, and a motor (in this embodiment, the motor is an ordinary motor), the motor is connected to the reducer, the reducer is connected to the coupling, the coupling is connected to the shaft of the gear, the gear drives the rack to move, the rack is connected to the moving part, and the moving part is rotatably connected to the pin shaft 304. The motor can be a servo motor. In this embodiment, the motor can also be a variable frequency motor. When a variable frequency motor is used, the reducer can be eliminated, and the motor is directly connected to the coupling.

[0120] Example 5

[0121] The large-angle installation hanger for a single wind turbine blade described in the present invention is different from that in Example 1 in that, in this embodiment, the linear drive component adopts a rack and pinion system to replace the rotary cylinder 301 (not shown).

[0122] Specifically, the sprocket chain system includes a sprocket and a chain matched therewith, and a motor (in this embodiment, the motor is an ordinary motor), the motor is connected to the reducer, the reducer is connected to the coupling, the coupling is connected to the shaft of the sprocket, the sprocket drives the chain to move, and the chain is directly connected to the pin 304. The motor can be a servo motor. In this embodiment, the motor can also be a variable frequency motor. When a variable frequency motor is used, the reducer can be eliminated, and the motor is directly connected to the coupling.

[0123] Example 6

[0124] like Figures 1 to 11 As shown, a method for installing a single wind turbine blade at a large angle according to the present invention uses a wind turbine blade installation hanger at a large angle as described in any one of Embodiments 1 to 5, and the method comprises the following steps:

[0125] 1. When it is necessary to clamp the blade 901, control the opening and closing cylinder 601 to extend, and when the lower connecting rod 604 rests on the limit block 607, lock the opening and closing cylinder 601. Then use the lifting equipment to lift the sling, and after the lower clamping plate 701 is pressed by the blade 901, control the clamping cylinder 705 to extend, so that the telescopic arm 703 moves downward and drives the upper clamping plate 702 to press the surface of the blade 901 to a suitable pressure value, and finally lock the clamping cylinder 705, and lock the telescopic arm 703 through the lock 704. After the blade 901 is clamped in this way, the blade 901 forms a whole with the claw arm 400, the opening and closing mechanism 600, the clamping mechanism 700 and the equipment platform 900, as shown in FIG. Figure 7 shown.

[0126] 2. After the lifting device and blade 901 are in the air, if the blade 901 needs to be rotated to adjust its posture, the moving end of the linear drive component can be controlled to move, so that the suspension rod slider 302 moves in the strip hole 101, and at the same time, the main beam slider 303 moves in the main beam slide groove 201, forcing the main beam 200 to rotate around the suspension rod 100, so that the lifting device and the blade 901 can be rotated around the horizontal axis of the blade 901, that is, the blade 901 is driven to rotate in the vertical plane. By controlling the distance that the moving end of the linear drive component moves each time, the rotation angle of the blade 901 can be precisely adjusted. By setting the stroke of the linear drive component, the rotation angle range of the blade 901 can be from -60° to +30°, so that the angle requirement of the three-blade wind turbine blade and the fan hub can be met when installing without using a turning tool. By controlling the retraction and extension length of the horizontal wind ropes 803 on both sides through the horizontal wind winch 801, the horizontal wind ropes 803 on both sides can produce different pulling forces on the sling, so that the sling or the sling and the blade 901 as a whole rotate around the vertical axis, thereby changing the direction of the sling or the sling and the blade 901 as a whole around the vertical axis.

[0127] 3. By controlling the extension and retraction of the pitch cylinder 501, the sling can drive the blade 901 to perform pitch movement in the longitudinal axis direction of the blade 901, so as to meet the adjustment and alignment requirements of the blade 901 with the hub bolt hole when installing. By controlling the distance of each extension and retraction of the pitch cylinder 501, the pitch angle of the blade 901 can be precisely adjusted. By setting the stroke of the pitch cylinder 501, the pitch angle range of the blade 901 can meet the minimum adjustment range requirements for the docking of the bolt holes. In order to prevent the sling and the blade 901 from swinging and rotating under the action of the ambient wind force, which affects the docking safety of the blade 901 with the wind turbine hub, the horizontal wind rope 803 and the vertical wind rope 804 can be tightened to the appropriate tension value by the horizontal wind winch 801 and the vertical wind winch 802 at the same time, and then the retracted and extended lengths of the horizontal wind rope 803 and the vertical wind rope 804 are locked. When the hanger tends to swing and rotate, the horizontal guy rope 803 or the vertical guy rope 804 automatically generates a return pulling force in the opposite direction to the hanger, thereby preventing the hanger and the blade 901 from swinging and rotating, and connecting the blade 901 and the fan hub by bolts.

[0128] 4. After the connection between the blades 901 and the fan hub is completed, when the fan needs to be turned, the crane can be used to lift and lower the sling, and at the same time control the movement of the moving end of the linear drive component to make the center of gravity of the sling and the center of the rigging connection hole 102 of the boom 100 basically on the same vertical line, which can drive the blades 901 and the fan hub to rotate around the rotation axis of the fan hub and turn the fan to the required angle.

[0129] 5. When the blade 901 is docked with the hub and the sling is separated from the blade 901, first open the locker 704 and put the clamping cylinder 705 in an unlocked state, control the clamping cylinder 705 to drive the telescopic arm 703 to move up, and then use the lifting equipment to lower the sling for a certain distance, control the opening and closing cylinder 601 to retract, and drive the lower arm 402 to rotate and open. Figure 8 At the same time, the moving end of the linear drive component is controlled to move and the pitch cylinder 501 is extended and retracted, so that the center of gravity of the sling and the center of the rigging connection hole 102 are basically on the same vertical line. Finally, the lifting equipment is operated to separate the sling from the blade 901.

[0130] The present embodiment describes a method for installing a single wind turbine blade at a large angle, wherein a connecting rod slider mechanism is formed by a linear drive component, a pin shaft 304, a suspension rod slider 302, a strip hole 101, a main beam slider 303 and a main beam slide groove 201, so that the linear drive component arranged on the main beam 200 forms a kinematic pair with the suspension rod 100 and the main beam 200 at the same time; when the main beam slider 303 moves in the main beam slide groove 201, it is mainly acted upon by frictional force in the direction of the main beam slide groove 201, and is mainly acted upon by the component force of the suspension rod slider 302 in the direction normal to the main beam slide groove 201, and the force is relatively small, and the suspension rod slider 302 is installed in the strip hole 101, and reciprocates in the strip hole 101. During movement, it is mainly acted upon by the thrust and pull of the linear drive component, which is used to change the size of the rotation angle between the suspension rod 100 and the main beam 200, thereby realizing the adjustment of the overall tilt angle of the installation hanger. Since the force required for rotation is relatively small, the connecting rod slider mechanism can select a single linear drive component with small driving force, which has good economy, reliability and safety. Through the rotation coordination of the suspension rod 100 and the main beam 200, the angle of the blade 901 in the vertical plane is changed, and through the coordination of the claw arm 400 and the pitch mechanism 500, the rotation of the blade 901 along its longitudinal axis is changed, so that the mounting hole on the blade 901 can be accurately aligned with the mounting hole of the installed wind turbine hub; by opening and closing The oil cylinder 601 extends out, and the upper connecting rod 605 pushes the lower connecting rod 604 to rotate the lower arm 402 to form a clamping space. After the upper connecting rod 605 or the lower connecting rod 604 abuts the limit block 607, the lower arm 402 stops rotating, and then fixes the blade 901 in the clamping space. The load of the blade 901 is transmitted to the lower connecting rod 604 and the upper connecting rod 605 through the lower arm 402, so that the second angle between the lower connecting rod 604 and the upper connecting rod 605 tends to decrease. However, due to the abutment of the limit block 607, the reduction of the second angle between the lower connecting rod 604 and the upper connecting rod 605 is limited, and the load is transmitted to the entire claw arm 400 by the limit block 607, and a mechanical self-locking structure is formed. At this time The opening and closing cylinder 601 is not subjected to force. When the blade 901 is detached and the load is released, the opening and closing cylinder 601 only needs a small force to pull the lower arm 402 to rotate. Therefore, the opening and closing cylinder 601 can select a small thrust cylinder with good economy, and the mechanical self-locking structure also has good safety. Only through the cooperation of the above-mentioned wind power single-blade large-angle installation hanger and the lifting equipment, the installed single blade 901 can be rotated around the rotation axis of the wind turbine hub, and no additional turning tooling is required, which saves costs and the installation and disassembly time of the turning tooling, and shortens the overall wind power installation time. The method has simple steps, easy operation and good effect. The installation method has simple steps, easy operation and good effect.

[0131] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A large-angle installation hanger for a single wind turbine blade, characterized in that: include: A suspension rod (100) is provided with strip holes (101) along its length direction, and a rigging connection hole (102) is provided at the top of the suspension rod (100); A main beam (200) is provided with a main beam sliding groove (201) along its length direction, the main beam (200) is hinged to the suspension rod (100), the main beam sliding groove (201) and the strip-shaped hole (101) are arranged alternately, and a first angle α is formed between a line connecting a hinge point between the main beam (200) and the suspension rod (100) and the rigging connection hole (102) and an axis of the strip-shaped hole (101), and the angle range of α is 5°-45°; The rotary mechanism (300) comprises a linear drive component, a suspension rod slider (302), a main beam slider (303) and a pin (304), wherein the linear drive component is arranged on the main beam (200), the suspension rod slider (302), the main beam slider (303) and the moving end of the linear drive component are coaxially rotatably connected to the pin (304), the suspension rod slider (302) is slidably connected to the strip hole (101), and the main beam slider (303) is slidably connected to the main beam slide groove (201); A claw arm (400) is used to clamp the blade (901), and the claw arm (400) is rotatably connected to the main beam (200); A pitch-changing mechanism (500) is connected to the main beam (200) and the claw arm (400), and the pitch-changing mechanism (500) is used to drive the claw arm (400) to rotate around the main beam (200).

2. The large-angle installation hanger for a single wind turbine blade according to claim 1, characterized in that: The linear drive component is a rotary oil cylinder (301), a rotary air cylinder, a screw system, a gear rack system or a sprocket chain system. The telescopic end of the rotary oil cylinder (301) or the rotary air cylinder is rotatably connected to the pin shaft (304), and the moving parts of the screw system, the gear rack system or the sprocket chain system are connected to the pin shaft (304).

3. The large-angle installation hanger for a single wind turbine blade according to claim 1, characterized in that: The angle range of α is 10°-20°.

4. The large-angle installation hanger for a single wind turbine blade according to claim 3 is characterized in that: The angle range of α is 15°-20°.

5. The large-angle installation hanger for a single wind turbine blade according to claim 1, characterized in that: The main beam (200) comprises a cross beam (202) and a supporting beam (203) connected thereto, the main beam sliding groove (201) is arranged between the cross beam (202) and the supporting beam (203), the cross beam (202) is hinged to the suspension rod (100), the linear drive component is arranged on the cross beam (202), the claw arm (400) is rotatably connected to the cross beam (202), and the pitch mechanism (500) is connected to the cross beam (202) and the claw arm (400).

6. The large-angle installation hanger for a single wind turbine blade according to claim 1, characterized in that: The claw arm (400) comprises an upper arm (401) and a lower arm (402) hinged thereto; the upper arm (401) is rotatably connected to the main beam (200); a clamping space is provided between the upper arm (401) and the lower arm (402); the clamping space is used to place the blade (901); and the pitch mechanism (500) is connected to the main beam (200) and the upper arm (401).

7. The large-angle installation hanger for a single wind turbine blade according to claim 6, characterized in that: It also includes an opening and closing mechanism (600), wherein the opening and closing mechanism (600) connects the upper arm (401) and the lower arm (402), and the opening and closing mechanism (600) is used to drive the lower arm (402) to rotate around the upper arm (401) and to limit the position of the lower arm (402).

8. The large-angle installation hanger for a single wind turbine blade according to claim 7, characterized in that: The opening and closing mechanism (600) comprises an opening and closing cylinder (601), an upper connecting rod (605), a lower connecting rod (604) and a limit block (607); one end of the upper connecting rod (605) is hinged to the upper arm (401), and the other end is hinged to one end of the lower connecting rod (604); the other end of the lower connecting rod (604) is hinged to the lower arm (402); the cylinder body of the opening and closing cylinder (601) is hinged to the upper arm (401); the telescopic end of the opening and closing cylinder (601) is hinged to one end of the upper connecting rod (605) connected to the lower connecting rod (604); the limit block (607) is arranged on the upper arm (401), the lower arm ( 402), the area between the lower connecting rod (604) and the upper connecting rod (605), the limit block (607) can abut against the upper connecting rod (605), the lower connecting rod (604), the lower arm (402) or the upper arm (401) to limit the rotation of the lower arm (402), when the limit block (607) abuts against the upper connecting rod (605), the lower connecting rod (604), the lower arm (402) or the upper arm (401), the second angle β between the upper connecting rod (605) and the lower connecting rod (604) is located on the side opposite to the limit block (607), and the value of β is greater than 0° and less than 180°.

9. The large-angle installation hanger for a single wind turbine blade according to claim 6, characterized in that: The invention also includes a clamping mechanism (700), wherein the clamping mechanism (700) includes an upper clamping plate (702), a lower clamping plate (701) and a telescopic arm (703), wherein the lower clamping plate (701) is connected to the lower arm (402), the telescopic arm (703) is connected to the upper arm (401), and the bottom of the telescopic arm (703) is connected to the upper clamping plate (702), and the upper clamping plate (702) and the lower clamping plate (701) are arranged opposite to each other and are respectively located at the upper and lower parts of the clamping space.

10. The large-angle installation hanger for a single wind turbine blade according to claim 1, characterized in that: The pitch mechanism (500) comprises a pitch cylinder (501), and two ends of the pitch cylinder (501) are respectively hinged to the main beam (200) and the claw arm (400).

11. The large-angle installation hanger for a single wind turbine blade according to any one of claims 1 to 10, characterized in that: The invention also includes a wind-cabling mechanism (800), wherein the wind-cabling mechanism (800) includes a horizontal wind-cabling winch (801), a vertical wind-cabling winch (802) and a guide wheel (805). The horizontal wind-cabling winch (801) and the vertical wind-cabling winch (802) are both arranged on the main beam (200). The guide wheel (805) is arranged at the end of the main beam (200). The horizontal wind-cabling winch (801) is provided with a horizontal wind rope (803), and the vertical wind-cabling winch (802) is provided with a vertical wind rope (804). The horizontal wind rope (803) and the vertical wind rope (804) are respectively guided by one of the guide wheels (805).

12. A method for installing a single wind turbine blade at a large angle, characterized in that: Using the large-angle installation hanger for a single wind turbine blade as claimed in any one of claims 1 to 11, the method comprises the following steps: The lifting equipment is connected to the suspension rod (100), and the claw arm (400) clamps and fixes the blade (901); Lifting the installation hanger and the blade (901) into the air; The moving end of the linear drive component works to move the suspension rod slider (302) in the strip hole (101) and simultaneously moves the main beam slider (303) in the main beam slide groove (201), forcing the main beam (200) to rotate around the suspension rod (100), thereby driving the blade (901) to rotate in a vertical plane; The pitch mechanism (500) drives the claw arm (400) to rotate around the main beam (200), that is, drives the blade (901) to perform pitch movement in the longitudinal axial direction of the blade (901), so that the blade (901) is aligned with the bolt hole of the wind turbine hub; The blade (901) and the fan hub are connected by bolts.

13. A wind turbine turning method, characterized in that: The method for installing a single wind turbine blade at a large angle as claimed in claim 12 further comprises: After the blade (901) is connected to the fan hub, the installation sling is raised and lowered by using the lifting equipment, and the movement end of the linear drive component is controlled to move, so that the center of gravity of the installation sling and the lifting point where the lifting equipment is connected to the installation sling are on the same vertical line, which can drive the blade (901) and the fan hub to rotate around the fan hub rotation axis, and the fan can be turned to a required angle.

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