A wind power blade spoiler device and method

Abstract

The present invention discloses a flow disturbance device and method for a wind power blade, which includes a blade flow disturbance device body sleeved on the impeller blade, a fixed wind rope for fixing the blade flow disturbance device body on the impeller blade, and a wind-catching rope for disassembling the blade flow disturbance device body. The blade flow disturbance device body has a regular or irregular protruding shape. One end of the blade flow disturbance device body far from the tip of the impeller blade is connected to one ends of the fixed wind rope and the wind-catching rope. The other end of the fixed wind rope is connected to the root of the impeller blade or the impeller hub; the other end of the wind-catching rope extends from one end of the blade flow disturbance device body close to the tip of the impeller blade and is fixed to the ground. The flow disturbance device for the wind power blade of the present invention solves the problem of blade vibration in the static state of the impeller during the period from the completion of the wind turbine hoisting to the operation, avoids the problems of bolt loosening at the connection parts of the whole machine caused by blade vibration and the increase of fatigue load caused by blade vibration, improves the safety, and extends the service life of the impeller blade.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind turbine blades, and particularly relates to a flow disturbance device and method for wind turbine blades. Background Art

[0002] To actively address the huge challenges of global climate change, it is expected that renewable energy sources such as wind power and photovoltaics will gradually develop from supplementary energy sources to mainstream energy sources. With the advent of the era of grid parity for wind power, high-quality wind energy resources and developable areas are gradually decreasing. Therefore, the single-unit capacity and blade length of wind turbines are getting larger and larger. Among them, the capacity of onshore wind turbines has reached more than 5 MW, and the blade length has reached more than 80 meters. As the blade length increases, the blade flexibility becomes greater. During the actual installation process of the wind turbine, especially when the impeller is in a stationary state, blade vibration is very likely to occur. Blade vibration will cause the bolts at the connection parts of the whole machine to loosen, posing a safety hazard. In addition, blade vibration will also lead to an increase in fatigue loads, which will have an adverse impact on the fatigue life of the blade body and other components of the wind turbine. Summary of the Invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a flow disturbance device and method for wind turbine blades, which are used to solve the blade vibration problem during the installation process of the wind turbine, especially when the impeller is in a stationary state.

[0004] To achieve the above object, the present invention provides the following technical solution: A flow disturbance device for wind turbine blades includes a blade flow disturbance device body sleeved on the impeller blades, a fixed wind rope for fixing the blade flow disturbance device body on the impeller blades, and a guy rope for disassembling the blade flow disturbance device body. The blade flow disturbance device body has a regular or irregular protrusion shape. One end of the blade flow disturbance device body away from the tip of the impeller blade is connected to one end of the fixed wind rope and the guy rope. The other end of the fixed wind rope is connected to the root of the impeller blade or the impeller hub; the other end of the guy rope extends from one end of the blade flow disturbance device body close to the tip of the impeller blade and is fixed to the ground.

[0005] Further, the blade flow disturbance device body includes a connecting plate and a plurality of flow disturbance strips connected to the connecting plate. The plurality of flow disturbance strips are arranged in parallel at intervals along the length direction of the connecting plate on the connecting plate.

[0006] Further, one end of the fixed wind rope is connected to one end of the connecting plate away from the tip of the impeller blade.

[0007] Further, the flow disturbance strips include a first flow disturbance strip and a second flow disturbance strip. One end of each of the first flow disturbance strip and the second flow disturbance strip is fixed on the connecting plate. Connection parts are provided at the ends of the first flow disturbance strip and the second flow disturbance strip away from the connecting plate. The first flow disturbance strip and the second flow disturbance strip are connected through the connection parts to form an annular flow disturbance strip.

[0008] Further, the connecting part is a magic tape, a metal snap button or a metal four-piece snap button.

[0009] Further, a plurality of hollow rivet holes are provided on the first spoiler bar, and the corresponding hollow rivet holes on several spoiler bars are located on the same straight line, and a wind-catching rope is threaded through the hollow rivet holes located on the same straight line.

[0010] Further, reserved knots are provided at the parts of the wind-catching rope close to the hollow rivet holes, and the number of the reserved knots is the same as the number of the spoiler bars.

[0011] Further, the spoiler bar is composed of a lightweight foam and a wrapping material wrapped around its outer surface. The lightweight foam is in a regular or irregular shape, and the wrapping material is a fiber material, a nylon material or a canvas.

[0012] The present invention also provides a usage method of a wind turbine blade spoiler device. During installation, the specific steps are as follows:

[0013] S1 After the wind-catching rope is connected to the blade spoiler device body, the blade spoiler device body is sleeved on the impeller blade.

[0014] S2 A fixed wind rope is connected to the blade spoiler device body, and the other end of the fixed wind rope is connected to the root of the impeller blade or the impeller hub to fix the blade spoiler device body on the impeller blade.

[0015] S3 When the impeller is hoisted, the blade spoiler device body and the fixed wind rope are hoisted together with the impeller, and the wind-catching rope is fixed at a designated position by the ground staff to complete the installation.

[0016] Further, during disassembly, after the end of the fixed wind rope connected to the root of the impeller blade or the impeller hub is disassembled, the ground staff pulls the wind-catching rope forcefully to make the blade spoiler device body separate from the surface of the impeller blade.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] The present invention provides a wind turbine blade spoiler device. By installing a blade spoiler device body with regular or irregular protrusion shapes on the impeller blade, regular or irregular protrusions are formed on the surface of the impeller blade, preventing the formation of aerodynamic excitation in a certain direction or pattern on the blade surface, realizing blade vibration suppression during the period from the completion of impeller hoisting to the start of unit operation, avoiding problems such as bolt loosening at the connection parts of the whole machine caused by blade vibration and increased fatigue load caused by blade vibration, improving safety, and prolonging the service life of the impeller blade.

[0019] Further, the hollow rivet holes provided on the spoiler strip are used for the airflow on the blade surface to pass through, forming turbulent flow or eddy current, reducing the pneumatic excitation energy. On the other hand, they are used for the disassembly of the spoiler strip. The guy wire realizes the pulling force of the guy wire for the disassembly of the spoiler strip through the reserved knot on the hollow rivet hole provided on the spoiler strip, so that the connection part on the spoiler strip is separated, thus facilitating the disassembly and recycling of the entire blade spoiler device. Brief Description of the Drawings

[0020] Figure 1 is the overall assembly drawing of the blade spoiler device.

[0021] Figure 2 is the structural schematic diagram of the blade spoiler device.

[0022] Figure 3 is the connection schematic diagram of the blade spoiler device.

[0023] Figure 4 is the schematic diagram of the composition of the spoiler strip.

[0024] Figure 5 is the structural schematic diagram of the hollow rivet hole of the blade spoiler device.

[0025] In the drawings: impeller blade 1; blade spoiler device body 2; connecting plate 21; spoiler strip 22; hollow rivet hole 23, connecting part 24; impeller hub 3; fixed guy wire 4; guy wire 5; reserved knot 51. Detailed Embodiment

[0026] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0027] The technical solution of the present invention is to design a blade spoiler device in combination with the aerodynamic characteristics of the blade, and install the blade spoiler device on the blade to achieve blade vibration suppression before the unit runs after the impeller hoisting is completed.

[0028] As Figure 1 shown, the present invention provides a wind power blade spoiler device, including a blade spoiler device body 2 sleeved on the tip of the impeller blade 1, a fixed guy wire 4 and a guy wire 5. Among them, the blade spoiler device body 2 has a regular or irregular protrusion shape. The blade spoiler device body 2 is used to form regular or irregular protrusions on the surface of the impeller blade 1, preventing the formation of aerodynamic excitation in a certain direction or law on the surface of the impeller blade 1. One end of the blade spoiler device body 2 away from the tip of the impeller blade 1 is connected to one end of the fixed guy wire 4, and the other end of the fixed guy wire 4 is connected to the root of the impeller blade 1 or the impeller hub 3 to prevent the blade spoiler device body 2 from detaching from the surface of the blade 1 due to its own weight;

[0029] One end of the vane spoiler device body 2 away from the tip of the impeller vane 1 is also fixedly connected to one end of the guy rope 5. The other end of the guy rope 5 extends out from one end of the vane spoiler device body 2 close to the tip of the impeller vane 1 and is fixed to the ground, and is controlled by the ground staff to realize the disassembly of the vane spoiler device body 2.

[0030] The vane spoiler device body 2 includes a connecting plate 21 and a plurality of spoiler bars 22 connected to the connecting plate 21. The plurality of spoiler bars 22 are arranged in parallel at intervals along the length direction of the connecting plate 21. The connection method between the connecting plate 21 and the spoiler bars 22 is not limited to bonding, bolting, tying, etc.

[0031] As Figure 2 shown, one end of the fixed guy rope 4 is connected to one end of the connecting plate 21 away from the tip of the impeller vane 1, and the connection method can adopt shackles or tying, etc.

[0032] As Figure 2 and Figure 3 shown, the spoiler bar 22 includes a first spoiler bar and a second spoiler bar. One ends of the first spoiler bar and the second spoiler bar are both fixed on the connecting plate 21. Connection parts 24 are arranged at the ends of the first spoiler bar and the second spoiler bar away from the connecting plate 21. The first spoiler bar and the second spoiler bar are connected through the connection parts 24 to form a ring-shaped spoiler bar 22.

[0033] Preferably, as Figure 2 、 Figure 5 shown, a plurality of hollow rivet holes 23 are arranged on the first spoiler bar. The corresponding hollow rivet holes 23 on the plurality of spoiler bars 22 are located on the same straight line. One end of the guy rope 5 is fixed in the hollow rivet hole 23 of the spoiler bar 22 away from the tip of the impeller vane 1. The other end of the guy rope 5 passes through the hollow rivet holes 23 located on the same straight line on the plurality of spoiler bars 22 in turn and approaches the tip of the impeller vane 1, and the guy rope 5 passing through the last hollow rivet hole 23 is connected to the ground.

[0034] Preferably, a plurality of hollow rivet holes 23 can also be arranged on the second spoiler bar.

[0035] Preferably, the connection part 24 can be a magic tape, a metal snap button or a metal four-in-one button.

[0036] Preferably, a reserved knot 51 is arranged on the guy rope 5 at a position close to the hollow rivet hole 23, and the number of the reserved knots 51 is the same as the number of the spoiler bars 22.

[0037] As Figure 3 and Figure 4 shown in the B-B cross-section of, the spoiler bar 22 is composed of a light foam and a wrapping material wrapped on its outer surface. The shape of the light foam can be circular, rectangular or polygonal, and the wrapping material can be a fiber material, a nylon material or a canvas.

[0038] Preferably, the hollow rivet holes 23 are, on the one hand, used for the air flow on the surface of the impeller blade 1 to pass through, forming a turbulent flow or a turbulent current, reducing the pneumatic excitation energy, and on the other hand, used for the disassembly of the blade spoiler device body 2.

[0039] During installation, the specific steps are as follows:

[0040] 1. Fix the wind-catching rope 5 on the blade spoiler device body 2. One end of the wind-catching rope 5 is fixed in the hollow rivet hole 23 of the spoiler bar 22 far from the tip of the impeller blade 1 through the reserved knot 51. The other end of the wind-catching rope 5 sequentially passes through the hollow rivet holes 23 on multiple spoiler bars 22 and extends out from the hollow rivet hole 23 of the spoiler bar 22 close to the tip of the impeller blade 1. Reserved knots 51 are arranged at the parts of the wind-catching rope 5 close to the hollow rivet holes 23. The number and positions of the reserved knots 51 match the hollow rivet holes 23 on the spoiler bars 22;

[0041] 2. Wind the spoiler bar 22 with the wind-catching rope 5 fixed on the blade spoiler device body 2 around the tip of the impeller blade 1 through the connecting part 24;

[0042] 3. Connect and fix the fixing wind rope 4 on the connecting plate 21 of the blade spoiler device body 2. The other end of the fixing wind rope 4 is connected to the root of the impeller blade 1 or the impeller hub 3, and is used to fix the blade spoiler device body 2 at the tip of the impeller blade 1;

[0043] 4. When the impeller is hoisted, the blade spoiler device body 2 and the fixing wind rope 4 are hoisted together with the impeller. After the hoisting is completed, the wind-catching rope 5 is fixed at a designated position by the ground staff, playing a role in suppressing the vibration of the blade;

[0044] When the fan is installed and the electrical connection is completed and powered on, and the unit can perform the pitch and yaw actions by itself to cope with the vibration of the impeller blade 1 and ensure the safety of the unit, the blade spoiler device body 2 can be disassembled. The specific steps are as follows:

[0045] 1. First, disassemble the end of the fixing wind rope 4 at the 6 o'clock position connected to the root of the impeller blade 1 or the impeller hub 3. Then, the ground staff pulls the wind-catching rope 5 hard. Through the reserved knot 51 of the wind-catching rope 5 reserved on the hollow rivet hole 23, the pulling force on the spoiler bar 22 is realized, so as to pull open several connecting parts 24 on the spoiler bar 22 and realize the separation of the blade spoiler device body 2 from the surface of the impeller blade 1;

[0046] 2. Rotate the second blade to the 6 o'clock position and repeat step 1 to disassemble the blade spoiler device body 2 on the second blade;

[0047] 3. Rotate the third blade to the 6 o'clock position and repeat step 1 to disassemble the blade spoiler device body 2 on the third blade;

[0048] 4. Untie all the reserved knots 51 on the guy rope 5, restore it to its original state, recover all the blade spoiler device bodies 2 and the fixed guy ropes 4, and wait for the next reuse.

[0049] The present invention discloses a wind power blade spoiler device and its installation method, including a blade spoiler device body sleeved on the tip of the impeller blade, a fixed guy rope for fixing the blade spoiler device body on the impeller blade, and a guy rope for disassembling the blade spoiler device body. The blade spoiler device body has a regular or irregular protrusion shape. One end of the blade spoiler device body away from the tip of the impeller blade is connected to one end of the fixed guy rope and the guy rope. The other end of the fixed guy rope is connected to the root of the impeller blade or the impeller hub; the other end of the guy rope extends from one end of the blade spoiler device body close to the tip of the impeller blade and is fixed to the ground. The wind power blade spoiler device of the present invention solves the problem of blade vibration in the static state of the impeller during the installation process of the wind turbine, especially during the period from the completion of the wind turbine hoisting to before operation, and avoids the problems of loosening of bolts at the connection parts of the whole machine caused by blade vibration and the increase of fatigue load caused by blade vibration, improves safety, and extends the service life of the impeller blade.

Claims

1. A flow disturbance device for a wind turbine blade, characterized in that, it includes a blade flow disturbance device body (2) sleeved on the impeller blade (1), a fixing guy rope (4) for fixing the blade flow disturbance device body (2) on the impeller blade (1), and a fetching guy rope (5) for disassembling the blade flow disturbance device body (2). The blade flow disturbance device body (2) has a regular or irregular protrusion shape. One end of the blade flow disturbance device body (2) far from the tip of the impeller blade (1) is connected to the fixing guy rope (4) and one end of the fetching guy rope. The other end of the fixing guy rope (4) is connected to the root of the impeller blade (1) or the impeller hub (3); the other end of the fetching guy rope (5) extends from one end of the blade flow disturbance device body (2) close to the tip of the impeller blade (1) and is fixed to the ground; the blade flow disturbance device body (2) includes a connecting plate (21) and a plurality of flow disturbance strips (22) connected to the connecting plate (21). The plurality of flow disturbance strips (22) are arranged on the connecting plate (21) at parallel intervals along the length direction of the connecting plate (21); the flow disturbance strips (22) include a first flow disturbance strip and a second flow disturbance strip. One end of each of the first flow disturbance strip and the second flow disturbance strip is fixed on the connecting plate (21). Connecting parts (24) are arranged at the ends of the first flow disturbance strip and the second flow disturbance strip far from the connecting plate (21). The first flow disturbance strip and the second flow disturbance strip are connected through the connecting parts (24) to form an annular flow disturbance strip (22); furthermore, the connecting part (24) is a magic tape or a metal snap fastener; furthermore, a plurality of hollow rivet holes (23) are arranged on the first flow disturbance strip. The corresponding hollow rivet holes (23) on the plurality of flow disturbance strips (22) are located on the same straight line, and the fetching guy rope (5) passes through the hollow rivet holes (23) located on the same straight line; furthermore, a reserved knot (51) is arranged on the fetching guy rope (5) at a position close to the hollow rivet holes (23), and the number of the reserved knots (51) is the same as the number of the flow disturbance strips (22).

2. A flow disturbance device for a wind turbine blade according to claim 1, characterized in that, one end of the fixing guy rope (4) is connected to one end of the connecting plate (21) far from the tip of the impeller blade (1).

3. A flow disturbance device for a wind turbine blade according to claim 1, characterized in that, the flow disturbance strip (22) is composed of a light foam and a wrapping material wrapped on its outer surface. The light foam is in a regular or irregular shape, and the wrapping material is a fiber material.

4. A method for using a flow disturbance device for a wind turbine blade according to any one of claims 1-3, characterized in that, the specific steps during installation are as follows: S1. After the fetching guy rope (5) is connected to the blade flow disturbance device body (2), the blade flow disturbance device body (2) is sleeved on the impeller blade (1); S2. The fixing guy rope (4) is connected to the blade flow disturbance device body (2), and the other end of the fixing guy rope (4) is connected to the root of the impeller blade (1) or the impeller hub (3) to fix the blade flow disturbance device body (2) on the impeller blade (1); S3. When hoisting the impeller, the main body (2) of the blade spoiler device and the fixed guy rope (4) are hoisted together with the impeller, and the guy rope (5) is fixed at the designated position by the ground staff to complete the installation.

5. The method for using a wind power blade spoiler device according to claim 4, characterized in that, During disassembly, after disconnecting the end of the fixed guy rope (4) connected to the root of the impeller blade (1) or the impeller hub (3), the ground staff pulls the guy rope (5) forcefully to separate the main body (2) of the blade spoiler device from the surface of the impeller blade (1).

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