Wind power blade anti-vortex-induced net cover assembling and disassembling device and using method thereof

Abstract

The invention discloses a wind power blade anti-vortex-induced net cover assembling and disassembling device and a using method thereof. The device comprises a net cover, an installing rope, a disassembling rope, a thread sleeve and a buckle component. The net sleeve is arranged on the surface of the wind power blade in a sleeving mode and located at the blade tip of the wind power blade, a mounting hole is formed in the wind power blade and located between the gravity center point of the wind power blade and the blade tip fulcrum, the thread sleeve is embedded in the mounting hole, a buckle component is installed in an inner cavity of the wind power blade, and a fixing buckle is arranged close to the mounting hole. The fixed end of the mounting rope is connected with the root of the net sleeve, the fixed end of the dismounting rope is connected with the tip of the net sleeve, and the free ends of the mounting rope and the dismounting rope penetrate through the mounting holes and are detachably mounted in an inner cavity of the wind power blade through buckle components, so that the mounting rope and the dismounting rope are prevented from being wound into a blade root hub and a main shaft of the wind power blade; the operation safety of constructors can be guaranteed, the quality of the wind power blade is not affected, and meanwhile the vortex-induced problem of the wind power blade at the low wind speed is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power blades, in particular to a wind power blade anti-vortex net installation and removal device and a use method thereof. BACKGROUND

[0002] In recent years, with the development of blades, the single machine capacity of wind turbines is continuously expanding, and the length of blades exceeds 160 meters, and the diameter of blade roots exceeds 6 meters has become a trend. With the increase of blades, the vortex shedding phenomenon of blades at low wind speed is highlighted, which brings a series of problems to the storage, transportation and idling of blades.

[0003] The blade vortex shedding vibration refers to that when the wind flows through the wind power blade, due to the non-streamline design of the blade, the vortexes will be generated alternately on both sides of the blade and separate from the surface of the blade. These vortexes interact with the existing vortexes, thereby causing the vibration phenomenon of the blade. With the increase of the blade, the vortex shedding phenomenon at low wind speed is more serious. With the increase of wind speed, the probability of vortex shedding is greatly reduced after the blade is connected to the grid and generates electricity, and it rarely occurs. Therefore, after the wind power blade is manufactured, it is necessary to take anti-vortex measures to reduce the harm of blade vortex shedding in the storage, transportation or idling of the whole machine in the wind field.

[0004] One of the most common and effective methods of anti-vortex at present is to install a net on the tail of the blade to disrupt the trajectory of the wind and prevent the formation of vortexes with stable frequency, thereby reducing the risk of vortex shedding. How to effectively install and remove the net has become the key point whether the net can be effectively implemented.

[0005] Currently, there are mainly two kinds of installation and removal of the net cover scheme for the mainstream blade. One is that the net cover rope is tied to the rain ring outside the hub fairing of the blade root. After the blade is hoisted, the rope cannot be directly removed outside the fairing in the air, and the net cover needs to be removed by the high-altitude crane and the high-altitude spiderman, which is low in efficiency and high in cost. Or, during the interval from hoisting the blade to grid-connected power generation, the blade can only be in a state without the net cover, and the vortex risk cannot be avoided. The second is that the net cover rope is tied to the hub fairing inside the blade root or the fairing. After the blade is hoisted, the operator can remove the net rope from the inside of the hub by entering the hub through the machine cabin. If the net rope cannot be removed from the inside, the rope needs to be cut from the outside of the cabin by the high-altitude crane and the spiderman, so as to remove the net cover. In addition, if the net cover cannot be removed due to weather factors such as rain, the net cover also needs to be removed by the basket, so the scheme is usually installed and fixed during hoisting, and the blade is removed before grid-connected power generation. There are quality risks during hoisting and machine shutdown and idling. The blade needs to use clamps and hangers during hoisting. In the case of wind, the tail of the blade is easy to be wound together with the hanger and the clamp, which affects hoisting. When the blade is hoisted and idled, the excess length of the rope caused by the weight of the blade will enter the cabin through the gap between the hub fairing and the cabin cover, and will be wound on the main shaft, causing damage to the related parts of the main shaft, or will be wound in the lightning protection accessories inside the hub through the gap between the fairing and the rain ring, causing damage. SUMMARY

[0006] The present application aims to solve the problems in the prior art, and provides a wind turbine blade anti-vortex net cover installation and removal device and a use method thereof, which can be implemented under various working conditions, ensures the safety of personnel operation, does not affect the quality of the wind turbine blade, and solves the vortex phenomenon of the wind turbine blade under low wind speed.

[0007] To achieve the above-mentioned purpose, the technical scheme provided by the present application is as follows: a wind turbine blade anti-vortex net cover installation and removal device, comprising a net cover, an installation rope, a removal rope, a screw sleeve and a buckle member; the net cover is sleeved on the surface of the wind turbine blade and located at the blade tip of the wind turbine blade; the wind turbine blade is provided with a mounting hole between the center of gravity of the wind turbine blade and the blade tip support point; the screw sleeve is pre-buried in the mounting hole; the inner cavity of the wind turbine blade is provided with the buckle member, and the fixing buckle is arranged close to the mounting hole; the fixed end of the installation rope is connected with the root of the net cover; the fixed end of the removal rope is connected with the tip of the net cover; the free ends of the installation rope and the removal rope are both inserted into the mounting hole and detachably installed in the inner cavity of the wind turbine blade through the buckle member, so that the installation rope and the removal rope are prevented from being wound into the blade root hub and the main shaft of the wind turbine blade; the length of the installation rope and the removal rope is not less than 70 meters.

[0008] Further, the device comprises a through-hole bolt; the through-hole bolt forms detachable connection with the sleeve, and a hole is formed on the through-hole bolt for the installation rope and the removal rope to pass through; the installation rope and the removal rope can pass through the hole and be connected with the buckle member.

[0009] Further, the device comprises a plug; the plug is connected with the sleeve, and sealing glue is arranged between the plug and the sleeve to prevent rain and dust from entering the inside of the wind turbine blade through the installation hole.

[0010] Further, the diameter of the installation hole is 25-30 mm.

[0011] Further, the diameter of the installation hole is greater than the diameter of the installation rope and the removal rope.

[0012] Further, the buckle member is an ohmic ring.

[0013] A use method of the wind turbine blade vortex-excited net installation and removal device, comprising:

[0014] First, the wind turbine blade is horizontally placed on the ground, and the through-hole bolt is installed at the installation hole and the pre-buried sleeve of the wind turbine blade; the installation hole is located between the center of gravity of the wind turbine blade and the blade tip support point, can avoid the lifting assembly located at the center of gravity of the wind turbine blade and avoid the hub of the blade root and the main shaft close to the wind turbine blade; the diameter of the installation hole of the wind turbine blade is 25-30 mm, which can make the installation rope and the removal rope pass through at the same time; the net sleeve is sleeved on the surface of the blade tip of the wind turbine blade; the installation rope connected with the root of the net sleeve and the removal rope connected with the tip of the net sleeve pass through the hole of the through-hole bolt and extend into the inner cavity of the wind turbine blade, and then are wound on the buckle member pre-set in the inner cavity of the wind turbine blade, so that the installation rope and the removal rope avoid the interference of the lifting assembly located at the center of gravity of the wind turbine blade and avoid being wound into the hub of the blade root and the main shaft, and the installation and fixation of the net sleeve are completed.

[0015] When the whole machine is completed hoisting, the wind power blade net cover needs to be disassembled before grid connection, the wind power blade is turned to horizontal direction in the air, the inner cavity of the wind power blade placed in horizontal direction forms a safe construction channel, the workers enter the safe construction channel from the pre-set manhole cover of the wind power blade, the installation rope and the disassembly rope are disassembled from the buckle member, under the action of the self-weight of the installation rope and the disassembly rope, the installation rope and the disassembly rope are separated from the inner cavity of the wind power blade through the hole bolt, the length of the installation rope and the disassembly rope is set according to the height of the wind turbine tower and the length of the blade, the length of the installation rope and the disassembly rope is not less than 70 meters, so that the disassembly rope can be lowered to the ground and has a margin, at this time, the workers disassemble the hole bolt from the screw sleeve, connect the plug and the screw sleeve, pour sealing glue between the plug and the screw sleeve, and then seal the whole wind power blade, so as to prevent rainwater and dust from entering the inside of the wind power blade, then the workers in the inner cavity of the wind power blade return to the ground, and the wind power blade is turned to the blade tip downward, the workers on the ground only need to pull the disassembly rope, and the net cover can be disassembled from the wind power blade in the air.

[0016] Compared with the prior art, the present application has the following advantages and beneficial effects:

[0017] 1. Compared with the prior art, the present application can be used after the wind power blade is hoisted and before it is connected to the grid, and can meet the anti-vortex effect of the net cover after the wind power blade is hoisted and before it is connected to the grid.

[0018] 2. Compared with the prior art, the present application can form a safe construction channel inside the wind power blade and perform disassembly work in the safe construction channel, which is short in disassembly time, low in cost and safe and reliable.

[0019] 3. The commonly used method is to fix the root of the net cover at the wind root, but due to the idling during hoisting, the excess length of the installation rope and the disassembly rope of the net cover is easy to be wound into the hub and the main shaft under the action of the self-weight, causing safety hazards, while the installation rope and the disassembly rope of the present application are fixed inside the wind power blade and will not be wound into the hub and the main shaft.

[0020] 4. During the hoisting of the blade, the clamp is generally clamped near the center of gravity of the blade, and the installation rope and the disassembly rope of the prior art may interfere with the clamp, affecting the hoisting quality and progress, while the installation rope and the disassembly rope of the present application can avoid the hoisting position and enter the inside from the middle part of the wind power blade, without affecting the hoisting of the wind power blade.

[0021] 5. After the installation rope and the disassembly rope are disassembled from the inside of the blade, the disassembly rope is lowered to the ground, and the net cover can be easily disassembled by pulling the disassembly rope. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structural schematic view of the wind turbine blade anti-vortex net installation and removal device.

[0023] Figure 2 It is a structural schematic view of the wind turbine blade anti-vortex net installation and removal device.

[0024] Figure 3 It is a sectional view of the installation structure of the installation rope, the removal rope, the buckle member and the wind turbine blade.

[0025] Figure 4 It is a sectional view of the installation structure of the installation rope, the removal rope, the buckle member and the wind turbine blade.

[0026] Figure 5 It is a structural schematic view of the removal rope escaping from the inside of the wind turbine blade.

[0027] Figure 6 It is a sectional view of the installation structure of the removal rope, the plug, the buckle member and the wind turbine blade after the removal rope escapes. DETAILED DESCRIPTION

[0028] The application will be further described below in combination with specific embodiments.

[0029] Embodiment 1

[0030] Referring to Figures 1 to 6 The wind turbine blade anti-vortex net installation and removal device provided by the embodiment includes a net cover 2, an installation rope 3, a removal rope 1, a screw sleeve 5, a buckle member 4, a hole bolt 6 and a plug 7.

[0031] The net cover 2 is sleeved on the surface of the wind turbine blade a and located at the blade tip of the wind turbine blade a. The wind turbine blade a is provided with an installation hole a1, which is located between the center of gravity of the wind turbine blade a and the blade tip support point, can avoid the hoisting assembly located at the center of gravity of the wind turbine blade a and is close to the blade root hub and the main shaft of the wind turbine blade a. The installation hole a1 has a hole diameter of 25-30 mm, and the installation rope 3 and the removal rope 1 can pass through the installation hole a1 at the same time. The screw sleeve is pre-buried in the installation hole a1. The buckle member 4 is installed in the inner cavity of the wind turbine blade a and close to the installation hole a1. The buckle member 4 is an Ohm ring. The fixed end of the installation rope 3 is connected with the root of the net cover 2. The fixed end of the removal rope 1 is connected with the tip of the net cover 2. The hole bolt 6 is detachably connected with the screw sleeve. The hole bolt 6 is provided with a hole for the installation rope 3 and the removal rope 1 to pass through. The free ends of the installation rope 3 and the removal rope 1 are inserted into the installation hole a1 through the hole bolt 6 and detachably installed in the inner cavity of the wind turbine blade a through the buckle member 4, so that the installation rope 3 and the removal rope 1 can avoid being wound into the blade root hub and the main shaft of the wind turbine blade a, and the installation and fixation of the net cover 2 are completed. The net cover 2 is made of nylon reinforced polyethylene material, and the installation rope 3 and the removal rope 1 are made of ultra-high molecular weight polyethylene material.

[0032] When the net cover 2 needs to be disassembled, the installation rope 3 and the disassembly rope 1 are disassembled from the buckle member 4, the opening bolt 6 is disassembled from the screw sleeve, the plug 7 is connected with the screw sleeve, and the sealing glue is arranged between the plug 7 and the screw sleeve, so as to prevent rain and dust from entering the inside of the wind power blade a through the installation hole a1.

[0033] In the embodiment, the wind power blade anti-vortex net cover dismounting device is applied to a wind power blade with a length of 100 meters, the wind power blade is configured with a steel tower, and the height of the steel tower is generally 120-140 meters, so that the length of the installation rope and the disassembly rope is set to be 70-80 meters, and at least 3 meters of excess length is left when the disassembly rope is vertically arranged on the ground.

[0034] Embodiment 2

[0035] The wind power blade anti-vortex net cover dismounting device provided in the embodiment is different from that in embodiment 1 in that the device is applied to a wind power blade with a length of 100 meters, the wind power blade is configured with a hybrid tower, and the height of the hybrid tower is generally 140-200 meters, so that the length of the installation rope and the disassembly rope is set to be 120 meters.

[0036] Embodiment 3

[0037] The method for using the wind power blade anti-vortex net cover dismounting device according to embodiment 1 comprises the following steps.

[0038] Firstly, the wind power blade is horizontally placed on the ground, the opening bolt is installed at the installation hole and the embedded screw sleeve of the wind power blade, the installation hole is located between the gravity center point and the blade tip support point of the wind power blade, the hoisting assembly located at the gravity center of the wind power blade is avoided, and the blade root hub and the main shaft close to the wind power blade are avoided, the installation hole of the wind power blade has a diameter of 25-30 mm, the installation rope and the disassembly rope can pass through the installation hole at the same time, the net cover is sleeved on the blade tip surface of the wind power blade, the installation rope connected to the root of the net cover and the disassembly rope connected to the tip of the net cover pass through the hole of the opening bolt and extend into the inner cavity of the wind power blade, and then are wound on the buckle member prearranged in the inner cavity of the wind power blade, as shown in FIG. 4, so that the installation rope and the disassembly rope avoid the interference of the hoisting assembly located at the gravity center of the wind power blade and are prevented from being wound on the blade root hub and the main shaft, and the installation and fixation of the net cover are completed, as shown in FIG. 5. Figures 3 to 4 Figures 1 to 2

[0039] ​​When the whole machine is hoisted, the net cover needs to be disassembled before being connected to the grid. The wind turbine blade is placed horizontally in the air, and the inner cavity of the wind turbine blade placed horizontally forms a safe construction channel. The worker enters the safe construction channel from the pre-set manhole cover of the wind turbine blade, and can easily disassemble the installation rope and the disassembly rope from the buckle member. Under the action of the self-weight of the installation rope and the disassembly rope, the installation rope and the disassembly rope are detached from the wind turbine blade through the hole bolt. As shown in Figure 6 The length of the installation rope and the disassembly rope is set according to the height of the wind turbine tower and the length of the blade. The length of the installation rope and the disassembly rope is not less than 70 meters, so that the disassembly rope can be lowered to the ground and have a margin. At this time, the worker disassembles the hole bolt from the screw sleeve, connects the plug with the screw sleeve, pours sealing glue between the plug and the screw sleeve, and then seals the whole wind turbine blade to prevent rainwater and dust from entering the inside of the wind turbine blade. Then, the worker in the inner cavity of the wind turbine blade returns to the ground, and turns the wind turbine blade to the tip-down direction. As shown in Figure 5 The worker on the ground only needs to pull the disassembly rope to disassemble the net cover from the wind turbine blade in the air.

[0040] The above-mentioned embodiments are only the preferred embodiments of the present application, and do not limit the scope of the present application. Any changes made according to the shape and principle of the present application should be covered within the scope of protection of the present application.

Claims

1. A wind turbine blade vortex induced netting assembly removal device, characterized by: The net cover, the installation rope, the removal rope, the screw sleeve and the buckle member; the net cover is sleeved on the surface of the wind power blade and located at the blade tip of the wind power blade, the wind power blade is provided with a mounting hole, the mounting hole is located between the gravity point and the blade tip fulcrum of the wind power blade, the screw sleeve is embedded in the mounting hole, the buckle member is installed in the inner cavity of the wind power blade and close to the mounting hole, the fixed end of the installation rope is connected with the root of the net cover, the fixed end of the removal rope is connected with the tip of the net cover, the free ends of the installation rope and the removal rope are inserted into the mounting hole and detachably installed in the inner cavity of the wind power blade through the buckle member, so that the installation rope and the removal rope are prevented from being wound into the blade root hub and the main shaft of the wind power blade, and the lengths of the installation rope and the removal rope are not less than 70 meters.

2. A wind turbine blade vortex inducing net assembly and disassembly device according to claim 1, characterized in that: The open hole bolt; the open hole bolt is detachably connected with the screw sleeve, the open hole bolt is provided with a hole for the installation rope and the removal rope to pass through, and the installation rope and the removal rope can be inserted into the hole and connected with the buckle member.

3. A wind turbine blade vortex inducing net assembly and disassembly device according to claim 1, characterized in that: The plug; the plug is connected with the screw sleeve, and a sealing glue is arranged between the plug and the screw sleeve to prevent rainwater and dust from entering the inside of the wind power blade through the mounting hole.

4. A wind turbine blade vortex inducing net assembly and disassembly device according to claim 1, characterized in that: The diameter of the mounting hole is 25-30mm.

5. A wind turbine blade vortex inducing net assembly and disassembly device according to claim 1, characterized in that: The diameter of the mounting hole is greater than the diameter of the installation rope and the removal rope.

6. A wind turbine blade vortex inducing net assembly and disassembly device according to claim 1, characterized in that: The buckle member is an ohmic ring.

7. A method of using a wind turbine blade vortex-induced netting assembly removal device according to any of claims 1-6, characterized in that, The method comprises the following steps: Firstly, the wind power blade is horizontally placed on the ground, the open hole bolt is installed at the mounting hole and the embedded screw sleeve of the wind power blade, the mounting hole is located between the gravity point and the blade tip fulcrum of the wind power blade, the hoisting assembly at the gravity point of the wind power blade is avoided, and the blade root hub and the main shaft close to the wind power blade are avoided, the diameter of the mounting hole of the wind power blade is 25-30mm, the installation rope and the removal rope can pass through at the same time, the net cover is sleeved on the surface of the blade tip of the wind power blade, the installation rope connected with the root of the net cover and the removal rope connected with the tip of the net cover are inserted into the inner cavity of the wind power blade through the hole of the open hole bolt, and then are wound on the buckle member preinstalled in the inner cavity of the wind power blade, so that the installation rope and the removal rope are prevented from being interfered by the hoisting assembly at the gravity point of the wind power blade and from being wound into the blade root hub and the main shaft, and the installation and fixation of the net cover are completed. When the whole machine is completed hoisting, the wind power blade needs to be disassembled from the net sleeve before being connected to the grid. The wind power blade is placed horizontally in the air, and the inner cavity of the wind power blade placed horizontally forms a safe construction channel. The workers enter the safe construction channel from the pre-set manhole cover of the wind power blade, and disassemble the installation rope and the disassembly rope from the buckle member. Under the action of the self-weight of the installation rope and the disassembly rope, the installation rope and the disassembly rope are detached from the inner cavity of the wind power blade through the hole bolt. The length of the installation rope and the disassembly rope is set according to the height of the wind turbine tower and the length of the blade. The length of the installation rope and the disassembly rope is not less than 70 meters, so that the disassembly rope can be lowered to the ground and have a margin. At this time, the workers disassemble the hole bolt from the screw sleeve, connect the plug with the screw sleeve, pour sealing glue between the plug and the screw sleeve, and then seal the whole wind power blade to prevent rainwater and dust from entering the inside of the wind power blade. Then the workers in the inner cavity of the wind power blade return to the ground, and the wind power blade is turned to the blade tip downward. The workers on the ground only need to pull the disassembly rope, and the net sleeve can be disassembled from the wind power blade in the air.

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