Blade self-deflection hoisting auxiliary device

Abstract

The invention discloses a blade self-deflection hoisting auxiliary device which comprises a supporting frame, connecting frames are arranged on the two sides of the supporting frame, mounting bases are rotationally arranged on the connecting frames, clamping pieces are arranged on the mounting bases, the two clamping pieces are matched to be used for fixing the two ends of a blade, and driving mechanisms are further arranged on the connecting frames. The driving mechanism can drive the mounting frame to rotate so as to drive the blades to deflect to change the windward side. The blade is clamped through the two clamping pieces, and then the supporting frame and the blade can be hoisted together through a crane to achieve hoisting. And when the blades are influenced by crosswind, the mounting frame and the blades can be driven by the driving mechanism to rotate together, so that the contact area between the blades and the crosswind can be reduced by changing the windward side of the blades. Compared with the prior art, the windward side of the blade can be changed through the driving mechanism, so that the borne lateral force is reduced, and the hoisting stability is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wind blade installation, and in particular to a blade self-deflection hoisting auxiliary device. Background Art

[0002] Wind is a new energy source with great potential. With the development of science and technology, wind power generation has become more and more advanced and widely used, which can provide a large amount of electricity for the country. Wind power generation mainly captures wind energy through the rotation of blades and converts it into electrical energy.

[0003] The installation methods of blades and towers are divided into the following two categories: 1. Integrated installation, that is, all blades and hub assemblies are assembled on the ground and then hoisted as a whole; 2. The hub assembly is hoisted first, and then the blades are assembled with the wind rotor assembly in the air in a single-blade installation method. Among them, single-blade installation can save construction platform area, thus reducing the construction cost of wind power projects. Based on this, single-blade installation has gradually become the mainstream installation method in recent years.

[0004] At present, a Chinese patent with the announcement number CN108439174A discloses a hoisting structure for hoisting wind turbine blades, including a rectangular frame and two hoisting rods opposite to the rectangular frame, and a support rod is provided at the bottom of each hoisting rod. When the blade is hoisted, the blade can be placed on the two support rods and clamped by the two hoisting rods, and then the crane can hoist the blade through the lifting ears on the rectangular frame. However, the wind direction of the wind farm is changeable. When the blade is hoisted, the blade is easily affected by the crosswind and subjected to a large lateral force, which will lead to a deterioration in the stability of the hoisting suspension and increase the suspension swing angle. In severe cases, the blade may shake during the hoisting process, increasing the risk of collision with surrounding objects. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a blade self-deflection hoisting auxiliary device.

[0006] The objective of the present invention is achieved through the following technical solutions: A blade self-deflection hoisting auxiliary device comprises a support frame, connecting frames are arranged on both sides of the support frame, a mounting seat is rotatably arranged on the connecting frame, a clamping piece is arranged on the mounting seat, and the two clamping pieces are used to fix the two ends of the blade in cooperation, and a driving mechanism is also arranged on the connecting frame, and the driving mechanism can drive the mounting frame to rotate, thereby driving the blade to deflect and change the windward surface.

[0007] Preferably, it further comprises a detection member for detecting whether the blade is subjected to lateral force, and the driving mechanism comprises a motor.

[0008] Preferably, the detection element includes a stress sensor or a visual gesture recognizer.

[0009] Preferably, a sliding seat is slidably adapted on the connecting frame, the mounting seat is rotatably supported on the sliding seat, and an elastic member is connected to the sliding seat, the driving mechanism includes a rack arranged on the connecting frame and a first gear arranged on the mounting seat, the first gear can engage with the rack, and a locking mechanism is also provided on the connecting frame, the locking mechanism is adapted to lock the relative position of the sliding seat and the connecting frame and maintain the natural state of the elastic member; when the locking mechanism is unlocked, the sliding seat slides under the gravity of the blade and drives the elastic member into a deformed state.

[0010] Preferably, the locking mechanism comprises an electromagnet, and the electromagnet is adapted to be able to adsorb the sliding seat when energized.

[0011] Preferably, it also includes a detection member for detecting whether the blade is subjected to lateral force, and the detection member is electrically connected to the electromagnet.

[0012] Preferably, the racks are provided on both sides of the first gear, and the racks on both sides are staggered in the vertical direction.

[0013] Preferably, the locking mechanism comprises a ratchet structure arranged vertically, and the sliding seat is provided with ratchets that can extend into or out of the ratchet structure.

[0014] Preferably, the locking mechanism includes a plurality of first locking grooves vertically opened on the side walls of the connecting frame and a plurality of second locking grooves opened on the sliding seat, the first locking grooves cooperate with the second locking grooves to form a locking cavity with a V-shaped cross-section, and a locking column is provided through at least one of the locking cavities; when the locking column is located at the bottom of the locking cavity, the locking column limits the relative position of the sliding seat and the connecting frame; when the locking column falls into the first locking groove or the second locking groove, the sliding seat can slide.

[0015] Preferably, a second gear and a third gear are rotatably arranged on the sliding seat, the second gear is meshed between the first gear and the third gear, the third gear has the same diameter as the first gear, a trigger plate is arranged on the third gear, the trigger plate is elastic and is adapted to be deformed under the action of lateral force, the ratchet can be elastically arranged to one side of the ratchet structure, and a cable is connected between the trigger plate and the ratchet.

[0016] The beneficial effects of the present invention are: 1. The blades are clamped by two clamping parts, and then the crane can lift the support frame and the blades together to achieve hoisting. When the blades are affected by crosswind, the drive mechanism can drive the mounting frame and the blades to rotate together, so that the blades can change the windward surface to reduce the contact area with the crosswind. Compared with the prior art, the present invention can change the windward surface of the blades through the drive mechanism, thereby reducing the lateral force borne, so that the stability of the hoisting is improved.

[0017] 2. Automatic adjustment of the windward side of the blade is achieved through the cooperation of the detection component and the motor.

[0018] 3. The windward side of the blade can be adjusted without a power source through the cooperation of the rack, the first gear and the locking mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view structural schematic diagram of an embodiment; Figure 2 is a schematic diagram of the structure of the elastic member; Figure 3 It is a schematic diagram of the top view of the structure of the embodiment (the support frame is omitted); Figure 4 It is a structural diagram of an electromagnet; Figure 5 It is a structural schematic diagram of the spinous structure; Figure 6 is a schematic diagram of the structure of the trigger sheet (the crosswind direction is shown in the form of an arrow); Figure 7 Schematic diagram of the locking cavity structure.

[0020] Figure numerals: 1. support frame; 2. connecting frame; 3. mounting seat; 4. clamping member; 5. driving mechanism; 6. detecting member; 7. motor; 8. sliding seat; 9. elastic member; 10. rack; 11. first gear; 12. locking mechanism; 13. electromagnet; 14. ratchet structure; 15. ratchet; 16. first locking groove; 17. second locking groove; 18. locking column; 19. second gear; 20. third gear; 21. trigger plate; 22. cable; 23. camera; 24. hub; 25. blade; 26. locking cavity. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0022] like Figures 1 to 7As shown, a blade self-deflection hoisting auxiliary device includes a support frame 1 for connecting to the steel cable of the crane, a connecting frame 2 is provided on both sides of the support frame 1, and a mounting seat 3 is rotatably provided on each connecting frame 2. Specifically, a clamping member 4 is also provided on the mounting seat 3, and the end of the blade 25 can be clamped by the clamping member 4. For example, the clamping member 4 can be a strap, a clamp, etc., and the clamping member 4 can also be a clamping mechanism disclosed in the Chinese patent with the announcement number CN219012770U. During hoisting, the two ends of the blade 25 to be installed can be clamped on the two clamping members 4 respectively, and then the support frame 1 together with the blade 25 can be hoisted by the crane to complete the hoisting.

[0023] During the process of lifting the blade 25, due to the changeable wind direction in the wind field, the blade 25 may be affected by the crosswind and bear excessive lateral force. In severe cases, the blade 25 may shake during the lifting process, and accidents such as the blade 25 and the crane tipping over also occur frequently.

[0024] In view of the above technical problems, in the present disclosure, a driving mechanism 5 is further provided on the connecting frame 2, and the driving mechanism 5 is adapted to be able to drive the mounting frame to rotate, thereby driving the blade 25 clamped on the mounting frame to deflect to change the windward surface. It can be understood that during the process of lifting the blade 25, if the blade 25 is subjected to crosswind, especially when the SS surface (i.e., leeward surface) and PS surface (i.e., pressure surface) of the blade 25 are subjected to the frontal impact of the crosswind, the driving mechanism 5 can be controlled to drive the blade 25 to rotate so that the blade 25 reduces the contact area with the crosswind, and finally achieves the purpose of reducing the magnitude of the lateral force borne by the blade 25.

[0025] like Figure 1 As shown, in some embodiments, the driving mechanism 5 may include a motor 7 connected to one of the mounting seats 3, and the motor 7 may actively drive the mounting seat 3 to rotate, thereby driving the blade 25 to achieve active deflection. For example, the present disclosure may also include a detection member 6 for detecting whether the blade 25 is subjected to lateral force. The detection member 6 may include a stress sensor disposed on the blade 25, and the stress condition of the blade 25, such as the tilt state, is monitored by the stress sensor, and finally it can be determined whether the blade 25 is subjected to excessive lateral force and may affect the stability of the hoisting. According to the judgment result, the motor 7 is further controlled to respond to the corresponding driving action to achieve active deflection of the blade 25.

[0026] The detection member 6 may also include a visual posture identifier, for example, the visual posture identifier may include a camera 23 hinged on the connecting frame 2, the camera 23 does not deflect with the deflection of the connecting frame 2 under the action of gravity, and then the relative movement of the blade 25 within its field of view is photographed by one or more cameras 23, and finally it can be determined whether the blade 25 is subjected to excessive lateral force. Of course, the detection member 6 can also be an anemometer, which monitors the flow direction of the crosswind and is assisted by ground staff to determine the force condition of the blade 25, at which time the motor 7 can be manually started to deflect the blade 25.

[0027] like Figure 2 , Figure 3 , Figure 4 As shown, as another solution, a sliding seat 8 is adapted to slide vertically on the connecting frame 2, and the mounting seat 3 is rotatably supported on the sliding seat 8, and an elastic member 9 such as a spring is also connected to the sliding seat 8. The driving mechanism 5 includes a rack 10 provided on the connecting frame 2 and a first gear 11 provided on the mounting seat 3. In addition, a locking mechanism 12 is also provided on the connecting frame 2, and the relative position of the sliding seat 8 and the connecting frame 2 can be locked by the locking mechanism 12. Therefore, by controlling the locking and releasing actions of the locking mechanism 12, the present disclosure can have the following usage process: When the blade 25 is not installed in the present invention, the elastic member 9 pushes the sliding seat 8 to the initial position and maintains its natural state.

[0028] The two ends of the blade 25 are fixed to the two mounting seats 3 respectively through the clamping members 4 , and the locking mechanism 12 is kept in a locked state, so that the sliding seat 8 and the connecting frame 2 are not easily moved relative to each other due to the gravity of the blade 25 .

[0029] When the blade 25 is hoisted and subjected to crosswind, the locking mechanism 12 can be controlled to unlock and enter the released state, at which time the sliding seat 8 will slide under the gravity of the blade 25, and the elastic member 9 will enter a deformed state to drive the sliding seat 8 to be less likely to drop suddenly, for example, by the combination of a spring and a damper (not shown). In this process, the gear will mesh with the rack 10, and the mounting seat 3 will be driven to rotate under the transmission of the two, and then the locking mechanism 12 will be locked again after the blade 25 is deflected as expected.

[0030] Where possible, after the blade 25 enters the hoisting position, the locking mechanism 12 may be controlled to drive the blade 25 to deflect so as to enter the installation position, for example, the relative position of the bolt and the screw hole between the blade 25 and the hub 24 may be adjusted.

[0031] like Figure 4As shown, in some embodiments, the locking mechanism 12 may include an electromagnet 13, and, for example, the above-mentioned detection member 6 may be electrically connected to the electromagnet 13. When the blade 25 is in a normal lifting state, the detection member 6 does not send an abnormal signal, and the electromagnet 13 is energized to maintain the adsorption of the sliding seat 8; when the detection member 6 detects that the blade 25 is subjected to a large lateral force, the detection member 6 may send an abnormal signal, and the electromagnet 13 is powered off to release the adsorption of the sliding seat 8, until the blade 25 deflects to the expected angle, and the electromagnet 13 is re-energized to maintain the locking of the sliding seat 8.

[0032] like Figure 5 , Figure 6 As shown, in other schemes, the locking mechanism 12 may also include a ratchet structure 14 arranged vertically, and the sliding seat 8 is also provided with a ratchet 15 that can be inserted into or removed from the ratchet structure 14. The matching mode of the ratchet 15 and the ratchet structure 14 can refer to the locking mode of the ratchet pawl, except that the locking teeth of the ratchet structure 14 are arranged vertically. Therefore, as the ratchet 15 is inserted and locked in the ratchet structure 14, the sliding freedom of the sliding seat 8 will be limited, thereby maintaining the relative position with the connecting frame 2; as the ratchet 15 is released from the ratchet structure 14, the sliding seat 8 and the connecting frame 2 can move relative to each other.

[0033] In a preferred example, the insertion and removal of the ratchet 15 can be achieved mechanically without relying on electrical connection. For example, the sliding seat 8 is also rotatably provided with a second gear 19 and a third gear 20, for example, the third gear 20 has the same diameter as the first gear 11, and the second gear 19 is meshed between the first gear 11 and the third gear 20, and a trigger plate 21 is provided on the third gear 20. Specifically, the trigger plate 21 is adapted to be elastic and can be deformed under the action of lateral force, so that the trigger plate 21 can be regarded as a simulation of the posture of the blade 25. When the first gear 11 rotates under the action of the rack 10, for example, this rotation can be defined as a forward rotation, so that the second gear 19 will reverse and the third gear 20 will rotate forward, thereby achieving synchronous deflection of the trigger plate 21 and the blade 25.

[0034] More specifically, the ratchet 15 is adapted to be elastically arranged toward one side of the ratchet structure 14. For example, the ratchet 15 can be pushed into the ratchet structure 14 under the action of a spring to maintain the relative position of the sliding seat 8 and the connecting frame 2. A cable 22 is connected between the trigger plate 21 and the ratchet 15. When a crosswind occurs, the trigger plate 21 and the blade 25 will bear the lateral force from the crosswind in the same posture. At this time, the trigger plate 21 is more likely to deform and the ratchet 15 is pulled out of the ratchet structure 14 through the cable 22, so as to realize the automatic release of the locking state of the sliding seat 8 by the locking mechanism 12; and when the trigger plate 21 and the blade 25 are deflected to reduce the lateral force they bear, the trigger plate 21 will return to the undeformed state, thereby driving the ratchet 15 to re-extend into the ratchet structure 14 to keep the sliding seat 8 and the connecting frame 2 locked.

[0035] Compared with the solution in which the locking mechanism 12 is an electromagnet 13, in this solution, the mechanical locking and unlocking of the sliding seat 8 and the connecting frame 2 is achieved through the cooperation of the trigger plate 21, the cable 22, the ratchet 15 and the ratchet structure 14, and it is not easy for the locking mechanism 12 to not be unlocked when the blade 25 is subjected to excessive lateral force.

[0036] like Figure 6 As shown, in another example, the locking mechanism 12 may further include a plurality of first locking grooves 16 vertically provided on the side wall of the connecting frame 2 and a plurality of second locking grooves 17 provided on the sliding seat 8. In the cross-sectional direction of the two locking grooves, the two locking grooves are both arranged to extend upwardly and obliquely, so when the first locking groove 16 and the second locking groove 17 are opposite to each other, the two cooperate to form a locking cavity 26 with a V-shaped cross section, and a locking column 18 is provided through at least one of the locking cavities 26. It can be understood that during the normal lifting of the blade 25, the locking column 18 will fall to the bottom of the locking cavity 26 under the action of gravity. At this time, the locking column 18 will be engaged between the sliding seat 8 and the connecting frame 2, thereby keeping the relative positions of the two locked; when the blade 25 is tilted by lateral force, the locking column 18 will fall into the first locking groove 16 or the second locking groove 17, thereby releasing the above-mentioned locking state, and then the sliding seat 8 will slide until the blade 25 deflects and reduces the lateral force it is subjected to. The blade 25 and the support frame 1 will re-enter the vertical state and drive the locking column 18 to fall to the bottom of the locking cavity 26 again to maintain the relative positions of the sliding seat 8 and the connecting frame 2.

[0037] For example, racks 10 may be arranged on both sides of the first gear 11, and the racks 10 on both sides are arranged in a staggered manner in the vertical direction. Therefore, during the falling process of the sliding seat 8, the first gear 11 can repeatedly rotate forward and reverse under the action of the racks 10 on both sides, that is, the blades 25 will deflect within a certain angle to adjust the direction of the windward surface, rather than the blades 25 completely rotating in the circumferential direction, which will also help to improve the overall stability of the hoisting equipment when the blades 25 deflect.

[0038] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A blade self-deflection hoisting auxiliary device, characterized by: The invention comprises a support frame (1), connecting frames (2) are arranged on both sides of the support frame (1), a mounting seat (3) is rotatably arranged on the connecting frame (2), a clamping member (4) is arranged on the mounting seat (3), and the two clamping members (4) are used to fix the two ends of a blade (25), and a driving mechanism (5) is also arranged on the connecting frame (2), and the driving mechanism (5) can drive the mounting seat (3) to rotate, thereby driving the blade (25) to deflect and change the windward surface; The connecting frame (2) is slidably equipped with a sliding seat (8), the mounting seat (3) is rotatably supported on the sliding seat (8), and the sliding seat (8) is connected with an elastic member (9), the driving mechanism (5) comprises a rack (10) arranged on the connecting frame (2) and a first gear (11) arranged on the mounting seat (3), the first gear (11) can be meshed with the rack (10), and the connecting frame (2) is also provided with a locking mechanism (12), the locking mechanism (12) is adapted to lock the relative position of the sliding seat (8) and the connecting frame (2), and maintain the natural state of the elastic member (9); When the locking mechanism (12) is unlocked, the sliding seat (8) slides under the gravity of the blade (25) and drives the elastic member (9) into a deformed state; The locking mechanism (12) comprises a plurality of first locking grooves (16) vertically arranged on the side wall of the connecting frame (2) and a plurality of second locking grooves (17) arranged on the sliding seat (8), wherein the first locking grooves (16) cooperate with the second locking grooves (17) to form a locking cavity (26) with a V-shaped cross section, and a locking column (18) is arranged in at least one of the locking cavities (26); When the locking column (18) is located at the bottom of the locking cavity (26), the locking column (18) defines the relative position of the sliding seat (8) and the connecting frame (2); When the locking column (18) falls into the first locking groove (16) or the second locking groove (17), the sliding seat (8) can slide.

2. The blade self-deflection hoisting auxiliary device according to claim 1 is characterized in that: The racks (10) are arranged on both sides of the first gear (11), and the racks (10) on both sides are arranged in a staggered manner in the vertical direction.

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