Special lifting equipment for wind turbine blades

Abstract

The present invention proposes a special hoist for wind turbine blades, comprising a main crossbeam frame, a forward and reverse rotation adjustment mechanism, a left and right rotation adjustment mechanism and a clamping mechanism, wherein the left and right rotation adjustment mechanism comprises a rotating base hinged to the main crossbeam frame, and the forward and reverse rotation adjustment mechanism comprises a boom hinged to the rotating base, and the angle change between the rotating base and the main crossbeam frame, and the angle change between the boom and the rotating base are both achieved by oil cylinders, and the hinge axis of the rotating base on the main crossbeam frame and the hinge axis of the boom on the rotating base are perpendicular to each other; the clamping mechanism is located at both ends of the main crossbeam frame, and comprises a retractable sling and a self-aligning pressure arm assembly, and the sling and the self-aligning pressure arm assembly cooperate to fix and clamp the blades. The sling in the present invention flexibly utilizes the oil cylinder to achieve radial and axial adjustment of the wind turbine blades, has a simple structure, is easy to operate, and can be used to hoist wind turbine blades of various specifications, with high applicability.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting, and in particular to a special hoist for wind turbine blades. Background Art

[0002] The blades of wind turbines are an indispensable key component of wind turbines. They play a decisive role in the efficiency of wind energy conversion and affect the amount and cost of wind power generation. As wind turbines tend to be larger, the center of gravity of the main engine hub is getting higher and higher, and the length and weight of the blades are also getting larger and larger. Therefore, the installation and operation and maintenance of the blades have become an important issue.

[0003] The traditional installation of fan blades generally adopts the following two methods: 1. Single blade assembly. Use a sling to lift the blades separately, install them repeatedly from a horizontal position, and rotate the hub to correct the deviation (such as Figure 1 (As shown in the figure), during this process, the hub brake alone cannot guarantee braking at all angles. Furthermore, the blades may be affected by wind direction during installation, making alignment between the blades and the hub difficult, hindering overall wind turbine installation efficiency. 2. Impeller-type assembly: The three blades and the hub cap are assembled and hoisted onto the nacelle as a whole. This simplifies blade positioning and docking tasks during installation, reducing the complexity of the installation. However, compared to single-blade assembly, a larger installation platform is required.

[0004] Some existing hoists have proposed improvements to the problems in the single-blade assembly method, so that the angle of the blade can be changed to adapt to the orientation of the hub during the hoisting process. However, the installation of the entire hoist is cumbersome, bulky, complex in structure, and has high installation costs, resulting in a lack of significant improvement in installation efficiency. Moreover, the clamping mechanism used on the hoist cannot adapt to wind turbine blades of different specifications, resulting in poor applicability of the entire hoist. Summary of the Invention

[0005] The purpose of the present invention is to address the deficiencies of the prior art and provide a special wind turbine blade hanger with an automatic angle adjustment function, which has a simple structure and is used to solve the technical problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is implemented as follows: a special hoist for wind turbine blades, comprising a main beam frame, a forward and reverse rotation adjustment mechanism, a left and right rotation adjustment mechanism and a clamping mechanism, the left and right rotation adjustment mechanism comprising a rotating base and a left and right adjustment cylinder located on the main beam frame and hinged to the main beam frame, the two ends of the left and right adjustment cylinders are respectively hinged to the main beam frame and the rotating base, the forward and reverse rotation adjustment mechanism comprises a boom and a forward and reverse adjustment cylinder located on the rotating base and hinged to the rotating base, the two ends of the forward and reverse adjustment cylinders are respectively hinged to the rotating base and the boom, the hinge axis of the rotating base on the main beam frame and the hinge axis of the boom on the rotating base are perpendicular to each other; the clamping mechanism is located at the left and right ends of the main beam frame, comprising a retractable sling and a self-aligning pressure arm assembly, the sling is tensioned by tightening the cylinder, and the self-aligning pressure arm assembly is connected to the position of the sling corresponding to the bottom of the main beam frame through a pin shaft.

[0007] Specifically, the two ends of the sling are respectively connected to a sliding end unhooker and a fixed end unhooker, the fixed end bidirectional unhooker and the fastening cylinder are respectively connected to the front and rear sides of the main crossbeam frame through a pin shaft, the horizontal distance between the fixed end unhooker and the fastening cylinder is greater than the length of the radial cross section of the wind turbine blade, and the sliding end bidirectional unhooker is connected to the fastening cylinder by a pin shaft.

[0008] Specifically, the rotating base is in an inverted U shape, the rotating base is arranged perpendicular to the main beam frame, and its two ends are respectively hinged to the main beam frame; the boom is in an A shape, the bottom of the boom is arranged perpendicular to the rotating base and its two ends are respectively hinged to the rotating base.

[0009] Specifically, the sliding end releaser and the fixed end releaser used in the clamping mechanism are both bidirectional releasers.

[0010] Specifically, the self-aligning pressure arm assembly includes a V-shaped pressure arm and clamping blocks located at both ends of the pressure arm. The pressure arm is arranged perpendicular to the axis of the wind turbine blade, and a rubber sheet is fixed to the bottom of the clamping block.

[0011] Specifically, the clamping mechanism also includes a steering assembly for adjusting the direction of the sling. The steering assembly is located between the sliding end unhooker and the fixed end unhooker, close to the side of the sliding end unhooker. The steering assembly includes a cantilever fixed below the main crossbeam frame and a steering wheel located at the bottom of the cantilever and arranged perpendicular to the sling. The steering wheel is in contact with the sling.

[0012] Specifically, a baffle is provided on the middle part of the steering wheel.

[0013] Specifically, a sensor for feeding back the real-time status of the spreader is installed on the spreader, and a closed loop is achieved with the control system for controlling the oil cylinder.

[0014] The special hanger for wind turbine blades obtained by the above technical solution has the following beneficial effects:

[0015] 1. It realizes the fully automatic lifting of a single wind turbine blade, which is easy to operate and reduces the installation cost;

[0016] 2. A rotating base hinged to the main crossbeam is provided on the main crossbeam, and a boom is hinged on the rotating base. The hinge axis of the boom on the rotating base and the hinge axis of the rotating base on the main crossbeam are perpendicular to each other. The axial and radial directions of the wind turbine blades can be adjusted by the extension and contraction of the oil cylinder. The overall structure is simple and easy to install.

[0017] 3. The sling is tightened by the extension and retraction of the tightening cylinder, and the wind turbine blades are fixed and clamped with the cooperation of the self-aligning pressure arm assembly, so that the wind turbine blades maintain consistency with the movement of the sling during the lifting process.

[0018] 4. The horizontal distance between the fixed end unhooker and the fastening cylinder is greater than the length of the radial section of the wind turbine blade, so that the wind turbine blade remains flat during the lifting process. The center of gravity of the wind turbine blade is closer to the main crossbeam frame, reducing the impact of side wind on the wind turbine blade;

[0019] 5. By setting up a steering component, the contact friction between the sling and the tip of the wind turbine blade is reduced, thereby improving the service life of the sling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the existing installation of a single wind turbine blade.

[0021] Figure 2 It is a structural schematic diagram of the special hanger for wind turbine blades according to the present invention.

[0022] Figure 3 It is a structural schematic diagram of the clamping mechanism of the present invention.

[0023] Figure 4 It is a schematic diagram of the left-hand rotation adjustment structure of the spreader.

[0024] Figure 5 It is a schematic diagram of the right-hand rotation adjustment structure of the spreader.

[0025] Figure 6 It is a schematic diagram of the forward rotation adjustment structure of the spreader.

[0026] Figure 7 It is a schematic diagram of the reverse rotation adjustment structure of the spreader.

[0027] In the figure, there are the main beam frame 1; the forward and reverse rotation adjustment mechanism 2; the boom 21; the forward and reverse adjustment cylinder 22; the left and right rotation adjustment mechanism 3; the rotating base 31; the left and right adjustment cylinder 32; the clamping mechanism 4; the sling 41; the tightening cylinder 42; the fixed end unhooker 43; the sliding end unhooker 44; the self-aligning pressure arm assembly 45; the pressure arm 45a; the clamping block 45b; the rubber sheet 45c; the steering assembly 46; the cantilever 46a; and the steering wheel 46b. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] The present invention provides a special hoist for wind turbine blades, comprising a main crossbeam frame 1, a forward and reverse rotation adjustment mechanism 2, a left and right rotation adjustment mechanism 3, a clamping mechanism 4 and a control system. The forward and reverse rotation adjustment mechanism 2 is used to achieve radial horizontal adjustment of the wind turbine blades, the left and right rotation adjustment mechanism 3 is used to achieve axial horizontal adjustment of the wind turbine blades, and the clamping mechanism 4 is used to clamp the wind turbine blades. The control system feeds back real-time status information of the wind turbine blades through sensors installed on the hoist, and then remotely controls the forward and reverse rotation adjustment mechanism 2 and the left and right rotation adjustment mechanism 3 to meet real-time adjustment of the wind turbine blade angles and achieve closed-loop control, thereby ensuring safe and stable operation of the hoist during use.

[0030] As shown in the figure, the special hanger for wind turbine blades includes a main beam frame 1, a forward and reverse rotation adjustment mechanism 2, a left and right rotation adjustment mechanism 3 and a clamping mechanism 4. The clamping mechanism 4 is located at both ends of the main beam frame 1. The left and right rotation adjustment mechanism 3 is movably connected to the main beam frame 1 through a pin shaft, and the forward and reverse rotation adjustment mechanism 2 is movably connected to the left and right rotation adjustment mechanism 3 through a pin shaft.

[0031] Among them, the left and right rotation adjustment mechanism includes a rotating base 31 and a left and right adjustment cylinder 32 located on the main crossbeam frame 1 and hinged to the main crossbeam frame 1, and the two ends of the left and right adjustment cylinder 32 are respectively hinged to the main crossbeam frame 1 and the rotating base 31, and the forward and reverse rotation adjustment mechanism 2 includes a boom 21 and a forward and reverse adjustment cylinder 22 located on the rotating base 31 and hinged to the rotating base 31, and the two ends of the forward and reverse adjustment cylinder 22 are respectively hinged to the rotating base and the boom; it should be noted here that the hinge axes of the rotating base 31 and the boom 21 are perpendicular to each other, respectively realizing the adjustment of the left and right directions and forward and reverse directions of the main crossbeam frame.

[0032] Specifically, the rotating base 31 is in an inverted U shape, and the rotating base 31 is arranged perpendicular to the length direction of the main beam frame 1. Its two ends are respectively hinged to the main beam frame 1. The number of left and right adjustment cylinders 32 is not less than two, which are respectively located at the two ends of the rotating base 31 and the main beam frame 1. The projection of its telescopic direction on the horizontal plane is perpendicular to the hinge axis of the rotating base 31. The telescopic adjustment of the left and right adjustment cylinders 32 causes the rotating base 31 and the main beam frame 1 to change the angle, thereby realizing the left and right rotation of the hanger, and achieving the axial horizontal adjustment of the wind turbine blades. The purpose of adjustment; the boom 21 is A-shaped, the bottom of the boom 21 is perpendicular to the rotating base 31 and both ends are hinged to the rotating base 31 respectively, one end of the forward and reverse adjustment cylinder 22 is hinged to the rotating base 31, and the other end is hinged to the end of the boom 21 away from the rotating base 31. The projection of the telescopic direction of the forward and reverse adjustment cylinder on the horizontal plane is perpendicular to the hinge axis of the boom 21. The telescopic movement of the forward and reverse adjustment cylinder 22 causes the angle between the boom 21 and the rotating base 31 to change, thereby realizing the forward and reverse rotation of the sling to achieve radial horizontal adjustment of the wind turbine blades.

[0033] Of course, the direction of the rotating base 31 is adjustable, and the driving direction of the left and right adjustment cylinders 32 is adjusted accordingly. For example, the rotating base 31 is set to be consistent with the length direction of the main crossbeam frame 1, and the hinge axis of the boom 21 is still perpendicular to the length direction of the rotating base 31. At this time, the rotation of the rotating base 31 can realize the forward and reverse rotation of the sling, and the rotation of the boom 21 can realize the left and right rotation of the sling, that is, the adjustment directions of the sling by the rotating base 31 and the boom 21 are swapped, which does not affect the realization of the overall function of the present invention. The left and right adjustment cylinders 32 and the forward and reverse adjustment cylinders 22 can also be replaced by other simple telescopic structures.

[0034] The clamping mechanism 4 includes a retractable sling 41 and a self-aligning pressure arm assembly 45. The sling 41 is tightened by a tightening cylinder 42. Specifically, the two ends of the sling 41 are respectively fixed on a sliding end unhooker 44 and a fixed end unhooker 43. The fixed end unhooker 43 and the tightening cylinder 42 are respectively connected to the front and rear sides of the main crossbeam 1 through a pin shaft. The horizontal distance between the fixed end unhooker 43 and the tightening cylinder 42 is greater than the length of the radial section of the wind turbine blade to ensure that the wind turbine blade is consistent with the length direction of the main crossbeam and is placed flat on the sling. The self-aligning pressure arm assembly 45 is connected to the bottom of the main crossbeam frame 1 through a pin shaft, and the sliding end two-way unhooking device is connected to the fastening cylinder 42 by a pin shaft. The extension and contraction of the fastening cylinder 42 drives the sliding end two-way unhooking device and pulls the sling 41 to make the sling 41 fit the lower surface of the wind turbine blade. The self-aligning pressure arm assembly 45 automatically adjusts the angle to fit the upper surface of the wind turbine blade. The sling 41 and the self-aligning pressure arm assembly 45 cooperate to clamp the wind turbine blade, which can adapt to wind turbine blades of different specifications, ensuring that the wind turbine blades always keep consistent movement with the sling during the lifting process.

[0035] The number of the clamping mechanisms 4 is at least two groups, which are spaced apart along the length direction of the main crossbeam 1, so that the direction of the wind turbine blade is always consistent with the main crossbeam during the clamping process. The sliding end unhooker 44 and the fixed end unhooker 43 used in the clamping mechanism 4 are both bidirectional unhookers, which can achieve the simultaneous fixation of two slings 41, thereby improving the fixing ability of the wind turbine blade; the self-aligning pressure arm assembly 45 includes a V-shaped pressure arm 45a and a clamping block 45b located at both ends of the pressure arm 45a, and the pressure arm 45a is arranged perpendicular to the axis of the wind turbine blade. A rubber sheet 45c is fixed to the bottom of the clamping block 45b, which can reduce the wear of the wind turbine blade while increasing the clamping force on the upper surface of the wind turbine blade.

[0036] Furthermore, the clamping mechanism 4 also includes a steering assembly 46 for adjusting the direction of the sling 41. The steering assembly 46 is located between the sliding end unhooking device 44 and the fixed end unhooking device 43, close to the side of the sliding end unhooking device 44. The steering assembly 46 includes a cantilever 46a fixed below the main crossbeam frame 1 and a steering wheel 46b located at the bottom of the cantilever 46a and arranged perpendicular to the sling 41. The steering wheel 46b is in contact with the sling 41.

[0037] The middle part of the steering wheel 46b is sleeved with a baffle to prevent the slings 41 in the same group of clamping mechanisms 4 from overlapping and causing wear.

[0038] The radial cross-section of the wind turbine blade is in the shape of a water drop. When the wind turbine blade is hoisted, the sling 41 passes through the steering assembly 46 and is fixed on the sliding end decoupling device 44. The movable part three is adjusted to shrink the sling 41. The sling 41 cooperates with the self-aligning pressure arm assembly 45 to clamp the wind turbine blade. At this time, the tip of the wind turbine blade is facing the sliding end decoupling device 44, the main crossbeam is in a horizontal state, and the center of gravity of the entire wind turbine blade is low, which can better resist the influence of side wind and keep the wind turbine blade stable during the hoisting process.

[0039] When it is necessary to adjust the axis of the wind turbine blade to change the pitch so as to align with the bolt hole on the hub, the control system controls the forward and reverse adjustment cylinders 22 to apply force to one side of the rotating base, and the main crossbeam frame flips at a certain angle along with the rotating base, driving the wind turbine blade to rotate in the radial direction; when it is necessary to adjust the axis of the wind turbine blade to keep it parallel to the hub, the control system controls the left and right adjustment cylinders 32 to apply force to one side of the main crossbeam frame, and the main crossbeam frame drives the wind turbine blade to rotate in the axial direction.

[0040] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Any changes that may be made to certain parts thereof by those skilled in the art all reflect the principles of the present invention and fall within the scope of protection of the present invention.

[0041] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "disposed" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

Claims

1. A special hanger for wind turbine blades, characterized in that: The yoke is a device for adjusting the position of the lifting link and the support frame, and the yoke is a device for adjusting the position of the lifting link and the support frame, and the yoke is a device for adjusting the position of the lifting link and the support frame. The yoke is a device for adjusting the position of the lifting link and the support frame, and the yoke is a device for adjusting the position of the lifting link and the support frame. The two ends of the sling are respectively connected to a sliding end unhooking device and a fixed end unhooking device, and the fixed end unhooking device and the fastening oil cylinder are respectively connected to the front and rear sides of the main crossbeam frame through a pin shaft. The horizontal distance between the fixed end unhooking device and the fastening oil cylinder is greater than the length of the radial cross section of the wind turbine blade, and the sliding end unhooking device is connected to the fastening oil cylinder by a pin shaft; The clamping mechanism also includes a steering assembly for adjusting the direction of the sling. The steering assembly is located between the sliding end unhooker and the fixed end unhooker, close to the sliding end unhooker. The steering assembly includes a cantilever fixed below the main crossbeam frame and a steering wheel located at the bottom of the cantilever and arranged perpendicular to the sling. The steering wheel is in contact with the sling.

2. The special hanger for wind turbine blades according to claim 1, characterized in that: The rotating base is in an inverted U shape, the rotating base is arranged perpendicular to the main beam frame, and its two ends are respectively hinged to the main beam frame; the boom is in an A shape, the bottom of the boom is arranged perpendicular to the rotating base and its two ends are respectively hinged to the rotating base.

3. The special hanger for wind turbine blades according to claim 1, characterized in that: The sliding end releaser and the fixed end releaser used in the clamping mechanism are both bidirectional releasers.

4. The special hanger for wind turbine blades according to claim 1, characterized in that: The self-aligning pressure arm assembly includes a V-shaped pressure arm and clamping blocks located at both ends of the pressure arm. The pressure arm is arranged perpendicular to the axis of the wind turbine blade, and a rubber sheet is fixed to the bottom of the clamping block.

5. The special hanger for wind turbine blades according to claim 1, characterized in that: A partition is sleeved on the middle part of the steering wheel.

6. The special hanger for wind turbine blades according to claim 1, characterized in that: The spreader is equipped with a sensor for feeding back the real-time status of the spreader, which forms a closed loop with the control system of the oil cylinder.

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