Aerodynamic load reproduction device for wind turbine model tank test

Abstract

The application discloses a kind of aerodynamic load reproduction devices for fan model pool test, including support, tower tube, cabin, near end cantilever, far end cantilever, folding mechanism, variable pitch mechanism, controller, power supply, the cabin is set on the tower tube, support and cabin are connected, power supply is arranged in cabin, the edge of support is provided with multiple near end cantilevers that are equally spaced along circumference, and the inner end of each near end cantilever is respectively connected with variable pitch mechanism, and variable pitch mechanism is located in support, the outer end of each near end cantilever is connected far end cantilever by folding mechanism, and fan main machine is arranged on each far end cantilever, controller is set in support, and controller and power supply are electrically connected, and folding mechanism, variable pitch mechanism, fan main machine are electrically connected with controller respectively.The application can reproduce real-time aerodynamic load caused by real wind field in the process of test, improve test precision.

Description

Technical Field

[0001] This invention relates to the technical field of wind turbine model water tank test equipment, specifically to an aerodynamic load reproduction device for wind turbine model water tank tests. Background Technology

[0002] Offshore floating wind power equipment is a novel research topic, and pool testing of wind turbine models is an important research method. It plays a crucial role in accurately predicting the hydrodynamic and aerodynamic performance of offshore floating wind turbines, as well as their coupled motion. The aerodynamic loads in pool tests are typically simulated by the wind-generating system and blades composed of a fan matrix, which cannot be continuously changed during the test. Since actual wind fields are constantly changing, there is an urgent need to develop equipment that can continuously reproduce real-time aerodynamic loads to improve the accuracy of model tests. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an aerodynamic load reproduction device for wind turbine model water tank tests that can reproduce real-time aerodynamic loads caused by real wind conditions during the test process and improve the test accuracy.

[0004] This invention is achieved through the following technical solution: an aerodynamic load reproduction device for a wind turbine model water tank test, comprising a support, a tower, a nacelle, a near-end cantilever, a far-end cantilever, a folding mechanism, a pitch mechanism, a controller, and a power supply. The nacelle is mounted on the tower, the support is connected to the nacelle, and the power supply is located inside the nacelle. Multiple near-end cantilevers are evenly spaced along the circumference of the edge of the support, and the inner end of each near-end cantilever is connected to the pitch mechanism, which is located inside the support. The outer end of each near-end cantilever is connected to the far-end cantilever via the folding mechanism, and a fan motor is mounted on each far-end cantilever. The controller is located inside the support and is electrically connected to the power supply. The folding mechanism, the pitch mechanism, and the fan motor are each electrically connected to the controller.

[0005] Further: The folding mechanism includes a folding drive motor, a folding drive gear, a folding driven gear, a drive shaft, a distal connecting ear, a proximal connecting ear, and a connecting rod. The folding drive motor is located on the windward side of the proximal cantilever and is electrically connected to the controller. The output shaft of the folding drive motor is connected to the folding drive gear. Two symmetrically distributed proximal connecting ears are provided on the windward side of the proximal cantilever, and the folding drive motor is located between the two proximal connecting ears. Two symmetrically distributed distal connecting ears are provided on the windward side of the distal cantilever, and the distal connecting ears correspond one-to-one with the proximal connecting ears. The drive shaft is fixedly connected between the two distal connecting ears. The folding driven gear is fixedly mounted on the drive shaft and meshes with the folding drive gear. The connecting rod is located between the distal connecting ear and the proximal connecting ear, and one end of the connecting rod is fixed to the proximal connecting ear, while the other end of the connecting rod is rotatably connected to the drive shaft.

[0006] Further: The pitch mechanism includes a pitch drive motor, a pitch drive gear, a pitch driven gear, a rotating shaft, and a connecting flange. The pitch drive motor is electrically connected to the controller, the pitch drive motor is connected to the pitch drive gear, the pitch driven gear meshes with the pitch drive gear, the rotating shaft is rotatably mounted on a mounting base, the mounting base is disposed within the support, the pitch driven gear is fixedly mounted on the rotating shaft, and the pitch driven gear is fixed to the inner end of the proximal cantilever via the connecting flange.

[0007] Furthermore, both the proximal cantilever and the distal cantilever are hollow structures, and the cross-section of the distal cantilever is rectangular, while the proximal cantilever transitions from a rectangle to a circle from its outer end to its inner end.

[0008] Furthermore, the wall thickness on the windward side of the proximal cantilever and the wall thickness on the windward side of the distal cantilever are greater than the wall thickness on their other sides.

[0009] Furthermore: the support is a regular octagonal prism structure and is a hollow structure. The support has mounting holes on its edge, the number of which is equal to the number of the proximal cantilever. The inner end of the proximal cantilever passes through the mounting hole and is fixed to the connecting flange.

[0010] Furthermore, the shaft has an internal through-groove structure for laying wiring, and the inner wall of the support is provided with wiring holes.

[0011] Furthermore: the fan host includes blades and a servo motor, the output shaft of the servo motor is connected to the blades for driving the blades to rotate, and the servo motor is electrically connected to the controller.

[0012] Furthermore, four proximal cantilever arms are provided, and the included angle between any two adjacent proximal cantilever arms is 90°.

[0013] Furthermore, both the distal cantilever and the proximal cantilever are made of carbon fiber material.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] By setting multiple proximal cantilever arms evenly distributed along the circumference at the edge of the support, the inner end of each proximal cantilever arm is connected to a pitch mechanism, and the outer end of each proximal cantilever arm is connected to a distal cantilever arm through a folding mechanism. A fan main unit is installed on each distal cantilever arm. The controller is located inside the support. The controller controls the folding mechanism to drive the distal cantilever arm to rotate, thereby folding the distal cantilever arm and changing the incident angle of the fan main unit on the distal cantilever arm. The controller controls the rotation of the fan main unit blades, which can adjust the blade speed to generate thrust. The reaction force of the thrust can be used to simulate aerodynamic loads. When pitch is adjusted, the controller controls the pitch mechanism to drive the proximal cantilever arm to rotate, and the proximal cantilever arm drives the distal cantilever arm and the fan main unit to rotate. Through folding and pitch adjustment, real wind fields such as crosswind and starting torque can be realized to simulate the wind field changes of the actual wind field. This achieves the function of reproducing real-time aerodynamic loads caused by real wind fields during the test, improving the accuracy of the test. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a structural exploded view of the present invention;

[0018] Figure 3 This is a cross-sectional view of the support of the present invention;

[0019] Figure 4 This is a schematic diagram of the connection between the proximal and distal cantilever arms of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the distal cantilever of the present invention;

[0021] Figure 6 This is a schematic diagram of the proximal cantilever structure of the present invention.

[0022] Explanation of reference numerals in the attached drawings: 1-Support, 2-Tower, 3-Nacelle, 4-Near-end cantilever, 5-Far-end cantilever, 6-Folding mechanism, 7-Pitch mechanism, 8-Controller, 9-Fan main unit, 10-Folding drive motor, 11-Folding drive gear, 12-Folding driven gear, 13-Drive shaft, 14-Far-end connecting lug, 15-Near-end connecting lug, 16-Connecting rod, 17-Pitch drive motor, 18-Pitch drive gear, 19-Pitch driven gear, 20-Shaft, 21-Connecting flange, 22-Mounting base, 23-Mounting hole, 24-Wiring hole, 25-Blade, 26-Servo motor, 27-Wire hole. Detailed Implementation

[0023] Figures 1 to 6 This invention provides a schematic diagram of an embodiment of an aerodynamic load reproduction device for a wind turbine model water tank test, comprising a support 1, a tower 2, a nacelle 3, a near-end cantilever 4, a far-end cantilever 5, a folding mechanism 6, a pitch mechanism 7, a controller 8, and a power supply. The nacelle 3 is mounted on the tower 2, and the support 1 is connected to the nacelle 3. The power supply is located inside the nacelle 3. Multiple near-end cantilever 4s are arranged at equal intervals along the circumference of the edge of the support 1, and the inner end of each near-end cantilever 4 is connected to a pitch mechanism 7 located inside the support 1. The outer end of each near-end cantilever 4 is connected to the far-end cantilever 5 through the folding mechanism 6. A fan host 9 is mounted on each far-end cantilever 5. The controller 8 is located inside the support 1 and is electrically connected to the power supply. The folding mechanism 6, the pitch mechanism 7, and the fan host 9 are electrically connected to the controller 8.

[0024] The power supply (not shown) can be located at the rear of cabin 3 for easy weight balancing.

[0025] The folding mechanism 6 includes a folding drive motor 10, a folding drive gear 11, a folding driven gear 12, a drive shaft 13, a distal connecting lug 14, a proximal connecting lug 15, and a connecting rod 16. The folding drive motor 10 is located on the windward side of the proximal cantilever 4. The folding drive motor 10 is electrically connected to the controller 8. The output shaft of the folding drive motor 10 is connected to the folding drive gear 11. Two symmetrically distributed proximal connecting lugs 15 are provided on the windward side of the proximal cantilever 4, and the folding drive motor 10 is located between the two proximal connecting lugs 15. Two symmetrically distributed distal connecting ears 14 are provided on the windward side of the end cantilever 5, and the distal connecting ears 14 and the proximal connecting ears 15 correspond one-to-one. A drive shaft 13 is fixedly connected between the two distal connecting ears 14. A folding driven gear 12 is fixedly mounted on the drive shaft 13, and the folding driven gear 12 meshes with the folding drive gear 11. A connecting rod 16 is provided between the distal connecting ears 14 and the proximal connecting ears 15, and one end of the connecting rod 16 is fixed to the proximal connecting ear 15, while the other end of the connecting rod 16 is rotatably connected to the drive shaft 13.

[0026] The pitch mechanism 7 includes a pitch drive motor 17, a pitch drive gear 18, a pitch driven gear 19, a rotating shaft 20, and a connecting flange 21. The pitch drive motor 17 is electrically connected to the controller 8. The pitch drive motor 17 is connected to the pitch drive gear 18. The pitch driven gear 19 meshes with the pitch drive gear 18. The rotating shaft 20 is rotatably mounted on the mounting base 22, which is located inside the support 1. The pitch driven gear 19 is fixedly mounted on the rotating shaft 20. The pitch driven gear 19 is fixed to the inner end of the near-end cantilever 4 via the connecting flange 21.

[0027] Both the proximal cantilever 4 and the distal cantilever 5 are hollow structures, and the cross-section of the distal cantilever 5 is rectangular, while the proximal cantilever 4 transitions from a rectangle to a circle from the outer end to the inner end.

[0028] The wall thickness on the windward side of the proximal cantilever 4 and the wall thickness on the windward side of the distal cantilever 5 are greater than the wall thickness on the other sides of themselves.

[0029] By designing the wall thickness of the windward side of the near-end cantilever 4 and the windward side of the far-end cantilever 5 to be greater than the wall thickness of their other sides, the structural strength of the near-end cantilever 4 and the far-end cantilever 5 when facing the wind can be enhanced.

[0030] The support 1 has a regular octagonal prism structure and is hollow. The support 1 has mounting holes 23 on its edge, the same number as the number of near-end cantilever 4. The inner end of the near-end cantilever 4 passes through the mounting holes 23 and is fixed by the connecting flange 21.

[0031] The inside of the rotating shaft 20 has a through-slot structure, which is used for laying the wiring. The inner wall of the support 1 is provided with wiring holes 24.

[0032] A wire hole 27 is provided on the windward side of the near-end cantilever 4. The wire hole 27 is located next to the folding drive motor 10 for easy wiring.

[0033] The fan host 9 includes blades 25 and a servo motor 26. The output shaft of the servo motor 26 is connected to the blades 25 to drive the blades 25 to rotate. The servo motor 26 is electrically connected to the controller 8.

[0034] Four proximal cantilever arms 4 are provided, and the included angle between any two adjacent proximal cantilever arms 4 is 90°.

[0035] Both the distal cantilever 5 and the proximal cantilever 4 are made of carbon fiber.

[0036] The distal cantilever 5 and proximal cantilever 4 are made of carbon fiber, which reduces their weight.

[0037] When the incident angle of the blade 25 is changed, the controller 8 issues a folding command, controls the folding drive motor 10 to drive the folding drive gear 11 to rotate, the folding drive gear 11 drives the folding driven gear 12 to rotate, the folding driven gear 12 drives the drive shaft 13 to rotate, and the drive shaft 13 drives the remote cantilever 5 to rotate through the remote connecting lug 14, so that the remote cantilever 5 is folded to change the incident angle of the blade 25 on the remote cantilever 5. When the drive blade 25 rotates, the controller 8 controls the servo motor 26 to drive the blade 25 to rotate, which can adjust the speed of the blade 25 to generate thrust. The reaction force of the thrust can be used to simulate aerodynamic loads. When pitch is adjusted, the controller 8 controls the pitch drive motor 17 to drive the pitch drive gear 18 to rotate. The pitch drive gear 18 drives the pitch driven gear 19 to rotate. The pitch driven gear 19 drives the near-end cantilever 4 to rotate through the connecting flange 21. The near-end cantilever 4 drives the far-end cantilever 5 to rotate. The blade 25 on the far-end cantilever 5 rotates with the far-end cantilever 5. During the rotation of the pitch driven gear 19, the rotating shaft 20 rotates accordingly. By adjusting the folding and pitch, real wind fields such as crosswind and starting torque can be realized. This achieves the function of reproducing real aerodynamic loads caused by real wind fields during the test, improving the test accuracy and optimizing the wind generation system in the traditional water tank test.

[0038] The above detailed description is a specific description of feasible embodiments of the present invention. These embodiments are not intended to limit the patent scope of the present invention. All equivalent implementations or modifications that do not depart from the present invention should be included in the patent scope of this case.

Claims

1. An aerodynamic load reproduction device for water tank testing of a wind turbine model, characterized in that: The system includes a support, a tower, a nacelle, a near-end cantilever, a far-end cantilever, a folding mechanism, a pitch mechanism, a controller, and a power supply. The nacelle is mounted on the tower, and the support is connected to the nacelle. The power supply is located inside the nacelle. Multiple near-end cantilevers are evenly spaced along the circumference of the support, and the inner end of each near-end cantilever is connected to the pitch mechanism, which is located inside the support. The outer end of each near-end cantilever is connected to the far-end cantilever via the folding mechanism. A fan unit is mounted on each far-end cantilever. The controller is located inside the support and is electrically connected to the power supply. The folding mechanism, pitch mechanism, and fan unit are all electrically connected to the controller. The folding mechanism includes a folding drive motor, a folding drive gear, a folding driven gear, a drive shaft, a distal connecting ear, a proximal connecting ear, and a connecting rod. The folding drive motor is located on the windward side of the proximal cantilever and is electrically connected to the controller. The output shaft of the folding drive motor is connected to the folding drive gear. Two symmetrically distributed proximal connecting ears are provided on the windward side of the proximal cantilever, and the folding drive motor is located between the two proximal connecting ears. Two symmetrically distributed distal connecting ears are provided on the windward side of the distal cantilever, and the distal connecting ears correspond one-to-one with the proximal connecting ears. The drive shaft is fixedly connected between the two distal connecting ears. The folding driven gear is fixedly mounted on the drive shaft and meshes with the folding drive gear. The connecting rod is located between the distal connecting ear and the proximal connecting ear, and one end of the connecting rod is fixed to the proximal connecting ear, while the other end of the connecting rod is rotatably connected to the drive shaft. The pitch mechanism includes a pitch drive motor, a pitch drive gear, a pitch driven gear, a rotating shaft, and a connecting flange. The pitch drive motor is electrically connected to the controller, the pitch drive motor is connected to the pitch drive gear, the pitch driven gear meshes with the pitch drive gear, the rotating shaft is rotatably mounted on a mounting base, the mounting base is disposed within the support, the pitch driven gear is fixedly mounted on the rotating shaft, and the pitch driven gear is fixed to the inner end of the proximal cantilever via the connecting flange.

2. The aerodynamic load reproduction device for wind turbine model water tank testing according to claim 1, characterized in that: Both the proximal cantilever and the distal cantilever are hollow structures, and the cross-section of the distal cantilever is rectangular, while the proximal cantilever transitions from rectangular to circular from the outer end to the inner end.

3. The aerodynamic load reproduction device for wind turbine model water tank testing according to claim 2, characterized in that: The wall thickness on the windward side of the proximal cantilever and the wall thickness on the windward side of the distal cantilever are greater than the wall thickness on their other sides.

4. The aerodynamic load reproduction device for wind turbine model water tank test according to claim 3, characterized in that: The support is an octagonal prism with a hollow structure. The support has mounting holes on its edge, the number of which is equal to the number of the proximal cantilever. The inner end of the proximal cantilever passes through the mounting holes and is fixed to the connecting flange.

5. The aerodynamic load reproduction device for a wind turbine model water tank test according to claim 4, characterized in that: The shaft has an internal through-groove structure for laying wiring, and the inner wall of the support is provided with wiring holes.

6. The aerodynamic load reproduction device for a wind turbine model water tank test according to claim 5, characterized in that: The fan unit includes blades and a servo motor. The output shaft of the servo motor is connected to the blades to drive the blades to rotate. The servo motor is electrically connected to the controller.

7. The aerodynamic load reproduction device for a wind turbine model water tank test according to claim 6, characterized in that: The proximal cantilever is provided in four parts, and the included angle between any two adjacent proximal cantilever is 90°.

8. The aerodynamic load reproduction device for a wind turbine model water tank test according to claim 7, characterized in that: Both the distal cantilever and the proximal cantilever are made of carbon fiber.

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