Wind power blade tip overturning and damage preventing device and using method

Abstract

The invention relates to a wind power blade tip overturning and damage preventing device which comprises a cross beam type tip overturning lifting appliance and a root ring turning mechanism, the cross beam type tip overturning 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, and 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; 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. The stress 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 that the tip of the blade is overturned and damaged is effectively solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind turbine blade processing devices, and in particular relates to a wind turbine blade tip flipping anti-damage device and a use method thereof. Background Art

[0002] Wind energy is a clean and renewable energy source. Wind power generation has developed rapidly in my country in recent years. Wind turbine blades are key components of wind power generation systems. Their performance and quality are the determining factors for ensuring the stability and normal operation of wind turbines. The production process of wind turbine blades is generally: shell lamination, shell infusion, PS and SS half-piece bonding, blade demoulding, and post-processing. During the post-processing process, according to different operation steps and workshop layout, the blades need to undergo multiple flips to meet the requirements of flash cutting, repairing, component installation, grinding and painting, weighing and counterweighting, etc., and will also be transferred from the workshop to the transport bracket and sent to the external yard and wind farm. The blade postures are different in different processes, and the blade angles and postures need to be constantly changed to meet the portability of production. Therefore, it is very important to adjust the blade posture quickly and safely.

[0003] In conventional production, the flipping of blades is completed by turning the root (active flipping mechanism) and the tip (follow-up flipping mechanism). The tip encounters great resistance when flipping, and the rotation angle often lags behind the root turning. Therefore, the two are not flipped synchronously, which causes a large torque in the middle of the blade. In recent years, with the trend of larger blades, in order to meet the market demand for lightweight, the safety margin of blade design is relatively limited. Under the action of large flipping torque, the tip of the blade is often deformed and damaged, 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 or deformation to the blade.

[0005] Patent CN213825493U mentions a universal turning device for wind turbine blades, including a blade root turning mechanism for supporting the root of the blade and a blade mid-moving mechanism for lifting the blade; the blade root turning mechanism includes a base and a first bracket and a second bracket installed side by side on the base, the tops of the first bracket and the second bracket are roller mounting platforms designed obliquely, and the roller mounting platforms of the two brackets and their matching roller groups are combined into a blade root supporting position that is wide at the top and narrow at the bottom, so that the blade is driven to turn under the action of the roller group; the blade mid-moving ... first bracket and the second bracket are roller mounting platforms designed obliquely, and the roller mounting platforms of the two brackets and their matching roller groups are combined into a blade root supporting position that is wide at the top and narrow at the bottom, so that the blade is driven to turn under the action of the roller group; the blade mid-moving mechanism includes a base and a first bracket and a second bracket installed side by side on the base, the first bracket and the second bracket are roller mounting platforms designed obliquely, the roller mounting platforms of the two brackets and the matching roller groups are roller mounting platforms of the two brackets are roller mounting platforms of the two brackets are roller mounting platforms of the two brackets are roller mounting platforms of the two brackets are roller mounting platforms of the two brackets are roller mounting platforms of the two brackets are roller mounting platforms of the two brackets are roller mounting platforms of the two brackets are roller mounting platforms of the two brackets are roller mounting platforms of the two brackets are roller mounting platforms of the two brackets are roller mounting platforms of the two brackets are roller mounting platforms of the two brackets are roller mounting The mechanism includes a movable gantry, rollers and annular slings for the blades to pass through and then hang up. When the wind turbine blades flip over, the annular slings and the rollers form a synchronous rotation coordination. It can achieve synchronous flipping to a certain extent, but the tip gantry is fixed, the blades are not easy to enter the gantry, the operation steps are cumbersome, the gantry width is fixed, and it is not suitable for large blades. Moreover, the tip lifting point is a single-point type. When lifting the blades, the acute angle formed by the sling and the blades will form a large clamping force and extrusion on both sides of the blades, and will also damage the blades. Therefore, the reliability in actual use is poor. Summary of the invention

[0006] In order to solve the problems of the prior art, the present invention proposes a wind turbine blade tip flipping anti-damage device and a method of use. The purpose of the present invention and the technical problems solved are achieved by adopting the following technical solutions. According to a wind turbine blade tip flipping anti-damage device proposed by the present invention, it includes a beam-type tip flip hoist and a root circle mechanism. The beam-type tip flip hoist includes a lifting ring, a beam, a rotating shaft and a sling. The beam is arranged at the lower end of the lifting ring. The two ends of the beam are rotatably provided with a rotating shaft that can move along the length direction of the beam. The rotating shaft is driven by a reduction motor. A bearing structure is arranged in the rotating shaft. The sling passes around the rotating shaft and is connected end to end to form a ring. The sling is used to cover the tip of the blade. When the sling lifts the tip of the blade, it is in a straightened state, and the angle a formed with the horizontal line in the width direction of the blade is an obtuse angle.

[0007] Furthermore, the root circle turning mechanism is composed 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. They are used to move the root circle turning mechanism. The roller group is fixedly installed on the base and is symmetrically distributed around the center of the base. The roller group includes a lower roller for supporting the root of the blade and a side roller for driving the root of the blade to rotate. The roller group is driven by a controller.

[0008] Furthermore, the crossbeam is symmetrically provided with a plurality of pin holes, the rotating shaft is provided with connecting holes corresponding to the pin holes, and the rotating shaft is connected to the crossbeam by inserting the pins into the pin holes.

[0009] Furthermore, the sling is provided with a sling connecting buckle.

[0010] Furthermore, a leading edge guard plate matching the shape of the leading edge of the blade and a trailing edge guard plate matching 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: S1, place the root of the blade on the root circle mechanism, and place the tip of the blade on the sling, use the engineering lifting device to lift the beam, and lift the tip of the blade with the sling; 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 root of the blade to rotate, and the rotation of the shaft drives the tip of the blade on the sling to rotate synchronously to achieve blade flipping.

[0012] In summary, the present invention adopts a flipping mode in which the root circle mechanism drives the blade root to rotate and the rotating shaft drives the blade tip to rotate, so as to realize the flipping of the blade posture. This can avoid the phenomenon of flipping angle difference between the blade root and the blade tip in the existing flipping mode of active rotation of the blade root and follow-up rotation of the blade tip, thereby providing 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, and 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 when 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.

[0013] 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 according to 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 specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the root circle mechanism in the present invention.

[0015] Figure 2 This is a diagram showing the use status of the beam-type tip flip hanger of the present invention.

[0016] Figure 3 It is an axonometric view of the beam-type tip-turning sling (excluding the sling) of the present invention.

[0017] Figure 4 for Figure 3 Side view of.

[0018] Figure 5 Schematic diagram of the sling connecting buckle in the present invention.

[0019] Figure 6 This is a general effect diagram of the root circle mechanism and the crossbeam tip flip hanger of the present invention being used on a blade. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and preferred embodiments.

[0021] A wind turbine blade tip flipping anti-damage device according to the present embodiment comprises a cross-beam tip flipping hanger and a root circle mechanism. The root circle mechanism and the cross-beam tip flipping hanger simultaneously drive the blade to rotate for synchronous flipping. Compared with the flipping mode in which the blade root actively rotates and the blade tip follows the rotation, the present embodiment can avoid the phenomenon of flipping angle difference between the blade root and the blade tip in the aforementioned flipping mode.

[0022] See also Figure 1 The root circle mechanism includes a wheel 2, a base 3, a roller group 4 and a controller 5. The wheel 2 is installed at the lower end of the base 3, and the root circle can be moved at will, and the use site is flexible. The roller group 4 is symmetrically installed on both sides of the base 3. The blade root 1 is a standard circle, and the bolt holes are evenly distributed around 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 conjunction with the motor to transmit rotational force to the roller.

[0023] See also Figures 2 to 5The cross-beam tip flip sling includes a lifting ring 6, a cross-beam 7, a rotating shaft 8 and a lifting belt 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 lifting device, such as a trolley, a crane, etc.; the two rotating shafts 8 are rotatably installed at both ends of the cross-beam 7 and are driven by independent reduction motors respectively. In order to reduce the rotation friction, the rotating shaft 8 further includes two axle seats that are relatively arranged and installed on the cross-beam 7 on the same side, a supporting shaft installed between the two axle seats, and a cylinder arranged on the outside of the supporting shaft through two bearings, and the cylinder is for the lifting belt 9 to pass around. This embodiment adopts a structure in which a bearing is arranged at the center of the rotating shaft 8. This structure greatly reduces the blade flipping torque; one end of the lifting belt 9 passes around the aforementioned rotating shaft 8 and is connected to the other end of the lifting belt 9 through a lifting belt connecting buckle 10 to form a The ring-shaped sling 9 is sleeved on the blade tip 11. When the sling 9 hoists the blade tip 11, the sling 9 is in a straightened state, and the angle a formed with the horizontal line in the width direction of the blade is an obtuse angle. Compared with the acute angle, the sling 19 can avoid contact with the blade, reducing the clamping force and extrusion force on the left and right sides of the blade. At the same time, a leading edge guard plate 12 matching the shape of the leading edge of the blade and a trailing edge guard plate 13 matching the shape of the trailing edge of the blade are provided 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 a width of at least three times the width of the sling 9. With the help of the above-mentioned two guard plates, the sling 9 does not directly contact the blade, and the force-bearing area is increased during lifting, which can reduce the pressure at the blade lifting point and prevent the blade from being damaged at the lifting point.

[0024] A plurality of pin holes 14 are symmetrically provided at both ends of the crossbeam 7 along the length direction, and connecting holes corresponding to the pin holes 14 are provided on the shaft seats at both ends of the rotating shaft 8. The rotating shaft 8 is connected to the crossbeam 7 after being inserted into the pin holes 14 and the connecting holes through the pins 15. By inserting the pins 15 into different pin holes 14, the position of the rotating shaft 8 on the crossbeam 7 can be adjusted as the width of the blade changes, which can meet the needs of blades with a length of 50m-150m in the current market, and has strong adaptability.

[0025] Of course, in other embodiments of the present invention, other structures can be used to slide the rotating shaft 8 that moves along the length direction of the beam 7 at both ends of the beam 7. For example, both ends of the beam 7 are provided with sliding grooves extending along the length direction of the beam 7, and the position of the rotating shaft 8 on the beam can be flexibly adjusted by tightening the nut after the screw passes through different positions of the sliding groove.

[0026] See also Figure 6 , a method for using a wind turbine blade tip flipping damage prevention device: The blade root 1 is placed on the roller group 4, and the leading edge guard plate 12 and the trailing edge guard plate 13 are installed at the lifting point of the blade tip 11. The sling 9 is connected into an annular sleeve through the sling connecting buckle 10 to cover the blade tip 11 to install the guard plate. Then, the engineering lifting device is used to lift the beam 7 through the lifting ring 6. The sling 9 is in a straightened state when lifting, and the angle a formed with the horizontal line in the blade width direction is an obtuse angle. Then the roller group 4 rotates to drive the blade root 1 to rotate, and the reduction motor drives the rotating shaft 8 to rotate synchronously. The sling 9 and the rotating shaft 8 rotate synchronously. 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, so that the blade is flipped, realizing the linkage between the root circle car and the beam-type tip flipping hanger, reducing the blade torsion damage caused by conventional flipping tools and the clamping damage caused by the single-point flipping tool sling. The root circle car and the beam-type tip flipping hanger can be used between various blade types, which are convenient and flexible to use.

[0027] The above is only a preferred embodiment of the present invention. Any technician familiar with the profession, without departing from the scope of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention, still falls within the scope of the technical solution of the present invention.

Claims

1. A wind turbine blade tip tip overturning anti-damage device, comprising a beam-type tip overturning hanger and a root circling mechanism, characterized in that: The crossbeam-type tip-turning lifting device comprises a lifting ring (6), a crossbeam (7), a rotating shaft (8) and a lifting belt (9). The top of the crossbeam (7) is provided with a lifting ring (6), and the two ends of the crossbeam (7) are slidably provided with rotating shafts (8) that move along the length direction of the crossbeam (7). The rotating shaft (8) is driven by a reduction motor. The lifting belt (9) passes around the rotating shaft (8) and is connected end to end to form a ring. When the lifting belt (9) lifts the blade tip (11), it is in a straightened state, and the angle a formed with the horizontal line in the width direction of the blade is an obtuse angle.

2. A wind turbine blade tip flipping anti-damage device according to claim 1, characterized in that: The root wheel mechanism comprises a wheel (2), a base (3), a roller group (4) and a controller (5); the wheel (2) is mounted on the lower end of the base (3); the roller group (4) is symmetrically mounted on both sides of the base (3) and driven by the controller (5) in cooperation with a motor; the roller group (4) comprises a lower roller for supporting the blade root (1) and a side roller for driving the blade root (1) to rotate.

3. The wind turbine blade tip flipping damage prevention device according to claim 1, characterized in that: A plurality of pin holes (14) are symmetrically provided at both ends of the crossbeam (7), and a connecting hole corresponding to the pin hole (14) is provided on the rotating shaft (8). The rotating shaft (8) is connected to the crossbeam (7) after being inserted into the pin hole (14) and the connecting hole via a pin (15).

4. The wind turbine blade tip overturn damage prevention device according to claim 1, characterized in that: The sling (9) is provided with a sling connecting buckle (10).

5. The wind turbine blade tip overturn damage prevention device according to claim 1, characterized in that: When the lifting belt (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 lifting belt (9) and the blade tip (11).

6. A method for using a wind turbine blade tip flipping anti-damage device, characterized in that: The following steps are involved: S1, placing the root of the blade on the root circle mechanism, and placing the tip of the blade (11) on the sling (9), and using an engineering lifting device to lift the crossbeam (7), the sling (9) lifts the tip of the blade (11) to be in a straightened state, and the angle a formed by the sling (9) and the horizontal line in the width direction of the blade is an obtuse angle; S2, starting the root circle turning mechanism and the reduction motor at the same time, the root circle turning mechanism drives the root of the blade to rotate, and the rotation of the shaft (8) drives the blade tip (11) on the sling (9) to rotate synchronously, thereby realizing the blade flipping.

7. A method for using a wind turbine blade tip overturning damage prevention device according to claim 6, characterized in that: In the step S1, a leading edge guard plate (12) matching the shape of the leading edge of the blade and a trailing edge guard plate (13) matching the shape of the trailing edge of the blade are provided between the sling (9) and the blade tip (11).

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