Wind power blade tip overturning anti-damage device

Abstract

The utility model relates to a wind power blade tip overturn anti-damage device which comprises a cross beam type tip overturn lifting appliance and a root ring turning mechanism, the cross beam type tip overturn lifting appliance comprises a lifting ring, a cross beam, rotating shafts and a lifting belt, the cross beam is arranged at the lower end of the lifting ring, the rotating shafts capable of moving in the length direction of the cross beam are rotationally arranged at the two ends of the cross beam, and the root ring turning mechanism is arranged on the cross beam. The rotating shaft is driven by the gear motor, the hanging belt bypasses the rotating shaft and is connected end to end to form a ring, the hanging belt is used for sleeving the tip of the blade, the hanging belt is in a straightened state when lifting the tip of the blade, and an included angle a formed by the hanging belt and the horizontal line in the width direction of the blade is an obtuse angle. According to the utility model, the stressed area of the blade during hoisting can be increased, the pressure intensity of the blade hoisting point position is reduced, the blade hoisting point position is prevented from being damaged, and the problem of overturning damage of the tip of the blade is effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power blade processing devices, and particularly relates to a device for preventing damage to the tip of a wind power blade during flipping and a using method thereof. Background Technique

[0002] Wind energy is a clean and renewable energy source. In recent years, wind power generation has developed rapidly in China. Wind power blades are key components of wind power generation systems, and their performance and quality are decisive factors for ensuring the stable and normal operation of wind turbines. The production process of wind power blades generally includes: shell layup, shell perfusion, bonding of PS and SS half pieces, blade demolding, and post-treatment processing. During the post-treatment operation process, according to different operation steps and workshop layouts, the blades need to undergo multiple flips to meet the process requirements of flash cutting, repair, component installation, grinding and painting, weighing and counterweight, etc., and will also be transferred from the workshop to the transport bracket and sent to the external storage yard and wind farm. The postures of the blades are different in different processes, and it is necessary to continuously change the blade angle and posture to meet the portability of production. Therefore, it is very important to quickly and safely adjust the posture of the blades.

[0003] In conventional production, the flipping of the blade is completed by the root turntable (active flipping mechanism) and the tip turntable (follow-up flipping mechanism). When the tip turntable flips, the resistance it receives is very large, and the rotation angle often lags behind the root turntable. Therefore, the asynchronous flipping of the two causes a large torque in the middle of the blade. In recent years, with the trend of blade enlargement, in order to meet the market demand for lightweight, the safety margin of blade design is relatively close to the limit. Under the action of a large flipping torque, deformation damage often occurs at the position of the tip turntable of the blade, and the blade is damaged by force, resulting in customer complaints and quality losses.

[0004] Therefore, in order to solve the above safety problems, it is urgent to design a device that can achieve synchronous flipping, with small torque on the tip of the blade, safe and reliable during the blade flipping process, and will not cause damage and deformation to the blade.

[0005] In patent CN213825493U, a general flipping device for wind turbine blades is mentioned, which includes a blade root flipping mechanism for supporting the blade root and a blade middle follower mechanism for lifting the blade; the blade root flipping mechanism includes a base, a first bracket and a second bracket arranged side by side on the base, and the tops of the first bracket and the second bracket are roller mounting platforms with an inclined design. The roller mounting platforms of the two brackets and their supporting roller groups form a blade root supporting position that is wider at the top and narrower at the bottom, so that the blade is driven to flip under the action of the roller group; the blade middle follower mechanism includes a movable gantry, rollers and a circular sling, through which the blade passes to hang up the blade. When the wind turbine blade flips, the circular sling and the rollers form a synchronous rotation cooperation; it can achieve synchronous flipping to a certain extent. However, the tip gantry is fixed, it is not easy for the blade to enter the gantry, the operation steps are cumbersome, the width of the gantry is fixed, and it is not applicable to large blades. Moreover, the tip suspension point is a single-point type. When hoisting the blade, the acute angle formed by the sling and the blade will generate a large clamping force and extrusion on both sides of the blade, which will also damage the blade. Therefore, the reliability of actual use is poor. Summary of the Utility Model

[0006] To solve the problems of the prior art, the present utility model proposes a tip flipping anti-damage device for wind turbine blades and a using method. The purpose of the present utility model and the solution to its technical problems are achieved by adopting the following technical solutions. A tip flipping anti-damage device for wind turbine blades proposed according to the present utility model includes a beam-type tip flipping sling and a root circle vehicle mechanism. The beam-type tip flipping sling includes a lifting ring, a beam, a rotating shaft and a sling. The beam is arranged at the lower end of the lifting ring. Rotating shafts that can move along the length direction of the beam are rotatably arranged at both ends of the beam. The rotating shafts are driven by a reduction motor, and a bearing structure is arranged inside the rotating shafts. The sling bypasses the rotating shafts and is connected end to end to form a ring. The sling is used to sleeved the blade tip. When the sling hoists the blade tip, it is in a straightened state, and the included angle a formed with the horizontal line in the blade width direction is an obtuse angle.

[0007] Furthermore, the root circle vehicle mechanism consists of wheels, a base, a roller group and a controller. The wheels are installed at the lower end of the base and can move freely, which is used to move the root circle vehicle mechanism. The roller group is fixedly installed on the base and is symmetrically distributed around the center of the base. The roller group includes lower rollers for supporting the blade root and side rollers for driving the blade root to rotate. The roller group is driven by the controller.

[0008] Furthermore, a plurality of pin shaft holes are symmetrically arranged on the beam, and connection holes corresponding to the pin shaft holes are arranged on the rotating shafts. The rotating shafts are connected to the beam by inserting pins into the pin shaft holes.

[0009] Furthermore, a sling connection buckle is arranged on the sling.

[0010] Furthermore, a leading edge guard plate that matches the shape of the leading edge of the blade and a trailing edge guard plate that matches the shape of the trailing edge of the blade are provided between the sling and the tip of the blade.

[0011] Furthermore, a method for using a wind turbine blade tip flipping damage prevention device comprises the following steps:

[0012] S1, place the blade root on the root circle mechanism, and place the blade tip on the sling. Use the engineering lifting device to lift the beam and the sling to lift the blade tip.

[0013] S2, start the root circle turning mechanism and the reduction motor at the same time. The root circle turning mechanism and the reduction motor have the same rotation frequency. The root circle turning mechanism drives the blade root to rotate, and the rotation of the shaft drives the blade tip on the sling to rotate synchronously to realize blade flipping.

[0014] In summary, the present invention adopts a flipping mode in which the root of the blade is driven to rotate by the root circle mechanism and the rotating shaft drives the tip of the blade to rotate, so as to realize the flipping of the blade posture. It can avoid the phenomenon of flipping angle difference between the root and the tip of the blade in the existing flipping mode in which the root of the blade rotates actively and the tip of the blade rotates with it, and provides convenience for the smooth progress of production. The width of the beam-type tip flipping sling is larger than the width of the blade, and the angle formed by the sling and the horizontal line in the width direction of the blade is an obtuse angle, thereby avoiding the clamping and squeezing of the blade by the sharp angle formed by the sling and the blade during single-point lifting. At the same time, a guard plate is arranged between the contact point of the sling and the blade, which can increase the force area of the blade during lifting, reduce the pressure at the blade lifting point, prevent the blade lifting point from being damaged, and effectively solve the problem of damage to the blade tip during flipping.

[0015] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the root circle turning mechanism of the present invention.

[0017] Figure 2 This is a diagram showing the usage status of the beam-type tip flip spreader in the utility model.

[0018] Figure 3 This is an axonometric view of the crossbeam tip-turning sling (excluding the sling) of the present invention.

[0019] Figure 4 for Figure 3 side view.

[0020] Figure 5 Schematic diagram of the sling connecting buckle in the present utility model.

[0021] Figure 6 Overall effect diagram of the root circle vehicle mechanism and the crossbeam type tip flipping sling used on the blade in the present utility model. Specific implementation manner

[0022] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and preferred embodiments.

[0023] A wind turbine blade tip flipping anti-damage device in this embodiment includes a crossbeam type tip flipping sling and a root circle vehicle mechanism. The root circle vehicle mechanism and the crossbeam type tip flipping sling drive the blade to rotate simultaneously for synchronous flipping. Compared with the flipping mode of the root rotating actively and the tip rotating followingly, this embodiment can avoid the phenomenon of the flipping angle difference at the root part and the tip part in the aforementioned flipping mode.

[0024] Please refer to Figure 1 , the root circle vehicle mechanism includes wheels ②, a base ③, a roller group ④ and a controller ⑤. The wheels ② are installed at the lower end of the base ③, and the root circle vehicle can be moved freely, with a flexible use site. The roller group ④ is symmetrically installed on both sides of the base ③. The blade root ① is a standard circle, and bolt holes are evenly distributed in a circle at the root. The roller group ④ includes a lower roller for supporting the blade root ① and a side roller for driving the blade root ① to rotate. The roller group ④ is driven by the controller ⑤ in cooperation with a motor to transmit the rotational force to the rollers.

[0025] Please refer to Figures 2 to 5, The beam - type tip - flipping sling includes a lifting ring 6, a cross - beam 7, a rotating shaft 8 and a sling 9. The cross - beam 7 is arranged at the lower end of the lifting ring 6, and the lifting ring 6 can be connected to an engineering hoisting device, such as a crane, a hoist, etc.; The two rotating shafts 8 are rotatably installed at both ends of the cross - beam 7 and are respectively driven by independent reduction motors. Further, in order to reduce the rotational friction, the rotating shaft 8 includes two shaft seats arranged opposite to each other and installed on the same - side cross - beam 7, a support shaft installed between the two shaft seats, and a cylinder body arranged outside the support shaft through two bearings. The sling 9 bypasses the cylinder body. In this embodiment, a structure with a bearing arranged at the center of the rotating shaft 8 is adopted, and this structure greatly reduces the blade - flipping torque; One end of the sling 9 bypasses the aforementioned rotating shaft 8 and is connected to the other end of the sling 9 through a sling connection buckle 10 to form a loop for sleeving the blade tip 11. When the sling 9 hoists the blade tip 11, the sling 9 is in a straightened state, and the included angle a formed with the horizontal line in the blade width direction is an obtuse angle. Compared with an acute angle, it can avoid the sling 19 contacting the blade, reduce the clamping force and extrusion force on both sides of the blade. At the same time, a leading - edge guard plate 12 matching the shape of the leading - edge part of the blade and a trailing - edge guard plate 13 matching the shape of the trailing - edge part of the blade are arranged between the sling 9 and the blade tip 11. The leading - edge guard plate 12 and the trailing - edge guard plate 13 are made of fiberglass with a thickness of about 10 mm, and their width is at least three times the width of the sling 9. With the help of the aforementioned two guard plates, the sling 9 does not directly contact the blade, and when lifting, the stress area is increased, which can reduce the pressure at the sling point position of the blade and prevent the blade from being damaged at the sling point position.

[0026] A number of pin - shaft holes 14 are symmetrically arranged along the length direction at both ends of the cross - beam 7. Connection holes corresponding to the pin - shaft holes 14 are arranged on the shaft seats at both ends of the rotating shaft 8. The rotating shaft 8 is connected to the cross - beam 7 by inserting a pin - shaft 15 into the pin - shaft holes 14 and the connection holes. By inserting the pin - shaft 15 into different pin - shaft holes 14, the position of the rotating shaft 8 on the cross - beam 7 can be adjusted according to the change in the width of the blade, and it can meet the blades with a length range of 50m - 150m in the current market, with strong adaptability.

[0027] Certainly, in other embodiments of the present utility model, other structures can be adopted to slidably arrange the rotating shaft 8 moving along the length direction of the cross - beam 7 at both ends of the cross - beam 7. For example: sliding grooves extending along the length direction of the cross - beam 7 are arranged at both ends of the cross - beam 7. By passing a screw through different positions of the sliding groove and then tightening the nut, the position of the rotating shaft 8 on the cross - beam can be flexibly adjusted.

[0028] Please refer to Figure 6 , a method for using a damage - prevention device for the tip - flipping of a wind - power blade:

[0029] Place the blade root 1 on the roller set 4. At the same time, install the leading edge guard plate 12 and the trailing edge guard plate 13 at the hanging point of the blade tip 11. Connect the sling 9 into a loop through the sling connection buckle 10 to enclose the part of the blade tip 11 where the guard plate is installed. Then use the engineering hoisting device to lift the cross beam 7 through the lifting ring 6. When the sling 9 is hoisted, it is in a straightened state, and the included angle a formed with the horizontal line in the blade width direction is an obtuse angle. Then the roller set 4 rotates to drive the rotation of the blade root 1. At the same time, the reduction motor drives the synchronous rotation of the rotating shaft 8. The sling 9 and the rotating shaft 8 rotate in synchronous cooperation. Under the action of the friction force between the blade tip 11 and the sling 9, the blade tip 11 is driven to rotate synchronously with the blade root 1, causing the blade to flip, realizing the linkage of the root circle vehicle and the beam-type tip flipping spreader, reducing the blade torsional damage caused by conventional flipping tools and the clamping damage caused by the sling of the single-point flipping tool. Both the root circle vehicle and the beam-type tip flipping spreader can be universal among various blade profiles, and are convenient and flexible to use.

[0030] The above are only the preferred embodiments of the present invention. Any person skilled in the art, without departing from the scope of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A device for preventing damage to the tip of a wind turbine blade during tip flipping, comprising a crossbeam-type tip flipping sling and a root circle vehicle mechanism, characterized in that: The beam - type tip - flipping sling includes a lifting ring (6), a beam (7), a rotating shaft (8) and a sling (9). The lifting ring (6) is provided at the top of the beam (7), and the rotating shafts (8) which move along the length direction of the beam (7) are slidably provided at both ends of the beam (7). The rotating shafts (8) are driven by a reduction motor. The sling (9) bypasses the rotating shafts (8) and is connected end - to - end to form a loop. When the sling (9) lifts the blade tip (11), it is in a straightened state, and the included angle a formed with the horizontal line in the blade width direction is an obtuse angle.

2. The tip flipping anti-damage device for a wind turbine blade according to claim 1, wherein: The root - circle vehicle mechanism includes wheels (2), a base (3), a roller group (4) and a controller (5). The wheels (2) are installed at the lower end of the base (3). The roller group (4) is symmetrically installed on both sides of the base (3) and is driven by the controller (5) in cooperation with a motor. The roller group (4) includes a lower roller for supporting the blade root (1) and a side roller for driving the blade root (1) to rotate.

3. The tip-over damage prevention device for a wind turbine blade according to claim 1, characterized in that: A number of pin - shaft holes (14) are symmetrically provided at both ends of the beam (7). Connection holes corresponding to the pin - shaft holes (14) are provided on the rotating shafts (8). The rotating shafts (8) are connected to the beam (7) after pins (15) are inserted into the pin - shaft holes (14) and the connection holes.

4. The anti-damage device for the tip flipping of a wind turbine blade according to claim 1, characterized in that: A sling connection buckle (10) is provided on the sling (9).

5. The anti-damage device for the tip turnover of a wind turbine blade according to claim 1, wherein: When the sling (9) lifts the blade tip (11), a leading - edge guard plate (12) matching the shape of the blade leading edge and a trailing - edge guard plate (13) matching the shape of the blade trailing edge are provided between the sling (9) and the blade tip (11).

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