Wind turbine blade noise detection device

Abstract

The invention relates to the technical field of wind power generation equipment detection, and discloses a wind turbine blade noise detection device which comprises a detection cavity which is a pipe body with two open ends, and an arc-shaped guide groove is formed in the inner wall of the detection cavity; the moving part comprises an inner ring arranged in the detection cavity, a rotating ring rotationally connected with the inner ring and a first driving part connected with the inner ring, the rotating ring is provided with a guide column extending into the arc-shaped guide groove, the noise detector is arranged on the inner wall of the rotating ring, and the first driving part is used for driving the inner ring to move in the length direction of the detection cavity; the clamping piece comprises a plurality of clamping columns arranged on the detection cavity in a penetrating mode and a second driving piece connected with the multiple clamping columns, and the end, located in the detection cavity, of each clamping column is provided with an arc-shaped clamping plate so that the turbine can be clamped; the device solves the problems that an existing detection device is prone to displacement during clamping, poor in adaptability and prone to damage equipment, and a traditional detection device can only collect noise at a single angle or at a fixed height and is limited in detection range.

Description

Technical Field

[0001] This invention relates to the field of wind power equipment testing technology, and in particular to a wind turbine blade noise testing device. Background Technology

[0002] As the global energy structure shifts towards clean energy, wind power, as a low-carbon and environmentally friendly form of renewable energy, has become one of the core pillars of the new energy industry. Wind turbines, as the core equipment of wind power systems, generate noise during operation that not only impacts the surrounding ecological environment and residents' lives but may also reflect the equipment's operating status (such as blade wear and bearing failure). Therefore, noise detection has become a crucial aspect of wind turbine factory testing and operation and maintenance monitoring.

[0003] Traditional wind turbine noise detection devices typically employ a rigid hull structure, relying on a few statically positioned noise detectors to collect operational sound signals. While this arrangement meets basic testing requirements, it has significant drawbacks. Because the spatial coordinates of the noise detectors relative to the turbine are completely locked, they cannot be flexibly adjusted to accommodate the location, size, and radiation directivity of different sound sources such as the blade sweep surface, gearbox, generator, and tower. When changing blade lengths or measuring different turbine models, the measurement points remain in their original geometric positions, leading to the omission of some critical sound radiation areas, the masking of certain local noise peaks, and insufficient spatial sampling integrity. Furthermore, if reflections or standing waves from the hull boundary happen to fall at the fixed noise detector, the measured sound pressure level will deviate significantly from the free field value, and there is no means to identify and correct this by moving the measurement points. The resulting blind spots in azimuth coverage, missing spectral information, and interference from reflected sound drastically reduce the adaptability of a single device to the testing needs of multiple models and operating conditions, increasing R&D iteration costs and creating potential problems for subsequent noise assessment and optimization design. Summary of the Invention

[0004] This invention proposes a wind turbine blade noise detection device to address the shortcomings of the prior art. This device can collect noise signals from all directions of different types of blade turbines, avoiding the occurrence of coverage blind spots, loss of spectrum information and interference from reflected sound, and improving the device's adaptability to the detection needs of multiple models and multiple operating conditions.

[0005] The technical solution of the present invention is: a wind turbine blade noise detection device, comprising a noise detector, and the detection device further comprising: The detection chamber is a tube open at both ends, and an arc-shaped guide groove is provided on the inner wall of the detection chamber; The moving part includes an inner ring disposed in the detection cavity, a rotating ring rotatably connected to the inner ring, and a first driving member connected to the inner ring. The rotating ring is provided with a guide post extending into an arc-shaped guide groove. The noise detector is disposed on the inner wall of the rotating ring. The first driving member is used to drive the inner ring to move along the length direction of the detection cavity. The clamping component includes multiple clamping posts that pass through the detection cavity and a second driving component connected to the multiple clamping posts. Each clamping post has an arc-shaped clamping plate at its end located inside the detection cavity. The second driving component is used to drive the clamping post to slide on the detection cavity to clamp the turbine.

[0006] In at least one embodiment of the present invention, the inner wall of the detection cavity is provided with a vertical groove along the length direction, and the detection cavity is provided with an annular groove. The first driving member includes: a lead screw, a lead screw slider, and a rotary driving mechanism. The lead screw is rotatably connected in the vertical groove, and one end of the lead screw passes through the vertical groove and extends into the annular groove. The lead screw slider is disposed on the inner ring and extends into the vertical groove, and is threadedly connected to the lead screw. The rotary driving mechanism is disposed in the annular groove and is connected to the lead screw.

[0007] In at least one embodiment of the present invention, the second driving member includes: a slip ring, a plurality of connecting rods and a telescopic driving member, wherein the slip ring is sleeved on the detection cavity; the plurality of connecting rods correspond one-to-one with the plurality of clamping posts, and the two ends of each connecting rod are respectively hinged to the slip ring and the clamping post; the telescopic driving member is disposed on the detection cavity, and the movable rod of the telescopic driving member is connected to the slip ring.

[0008] In at least one embodiment of the present invention, a first gear is provided on the lead screw in the annular groove, and a gear ring is rotatably connected in the annular groove. The gear ring has an inner gear ring and an outer gear ring. The inner gear ring of the gear ring meshes with the first gear, and a second gear is provided on the rotary drive member to mesh with the outer gear ring.

[0009] In at least one embodiment of the present invention, a fixing ring is provided between the slip ring on the detection cavity and a plurality of clamping posts, and a plurality of guide rods are provided on the fixing ring, the plurality of guide rods passing through the slip ring and slidably connected to the slip ring.

[0010] In at least one embodiment of the present invention, when the plurality of clamping posts are in a clamping state, the length of each clamping post extending out of the detection cavity exceeds the outer diameter of the slip ring.

[0011] In at least one embodiment of the present invention, a plurality of guide rods are arranged in a circular array on a fixed ring, and a limiting block is provided at the end of each guide rod away from the fixed ring.

[0012] In at least one embodiment of the present invention, the inner surfaces of the plurality of arc-shaped clamps are provided with rubber pads.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention proposes a wind turbine blade noise detection device. In use, the wind turbine is placed inside the detection chamber. A second drive component then moves multiple clamping columns, ensuring each column drives an arc-shaped clamping plate to stably clamp different types of wind turbines from multiple directions, preventing radial displacement or axial movement during testing. The wind turbine is then started. Once the turbine is running stably, a first drive component moves the inner ring along the length of the detection chamber. During this movement, a rotating ring connected to the inner ring extends into the arc-shaped guide... The guide column inside the slot simultaneously drives the noise detector to rotate on the inner ring, allowing the noise detector to rotate circumferentially while its height is adjusted, thus comprehensively collecting noise signals from bladed turbines at different heights and angles. Compared with existing technologies, this noise detection device has a simple structure and can collect noise signals from bladed turbines in all directions to meet the detection needs of multiple models and operating conditions. It avoids the occurrence of blind spots in the acquisition coverage, the loss of spectrum information, and the interference of reflected sound, thereby improving the detection adaptability of the device and reducing the research and development iteration costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure in use of the present invention; Figure 3 This is a schematic cross-sectional view of the present invention; Figure 4 This is a schematic diagram of the detection cavity structure of the present invention; Figure 5 This is a schematic diagram of the inner ring and rotating ring structure of the present invention; Figure 6 This is a schematic diagram of the detection cavity and fixing ring structure of the present invention; Figure 7 This is a schematic diagram of the structure of the first driving component and the second driving component of the present invention; Figure 8 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 9 This is a schematic diagram of the clamping plate structure of the present invention.

[0015] Explanation of reference numerals in the attached figures: 1. Noise detector; 2. Detection chamber; 21. Arc-shaped guide groove; 22. Vertical groove; 23. Annular groove; 3. Moving part; 31. Inner ring; 32. Rotating ring; 321. Guide post; 33. First driving component; 331. Lead screw; 332. Lead screw slider; 333. Rotation driving component; 334. First gear; 335. Gear ring; 4. Clamping component; 41. Clamping post; 411. Arc-shaped clamping plate; 42. Second driving component; 421. Slip ring; 422. Connecting rod; 423. Telescopic driving component; 5. Fixed ring; 51. Guide rod. Detailed Implementation

[0016] The accompanying drawings in this invention are not strictly drawn to scale, and the specific dimensions and quantity of each structure can be determined according to actual needs. The drawings described in this invention are merely structural schematic diagrams.

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "inner," "outer," "upper," "lower," "far," "near," "front," and "rear" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] The existing clamping mechanisms of wind turbine noise detection devices have several technical drawbacks: First, insufficient clamping stability. Traditional clamping often uses manually adjusted bolts or simple calipers for fixation, which can easily lead to radial displacement or axial movement when the turbine rotates at high speed, causing deviations in the signals collected by the noise detector and affecting detection accuracy. Second, poor adaptability. Wind turbines of different power and specifications have significant differences in root diameter and blade mounting dimensions. Traditional clamps are mostly designed with fixed dimensions, requiring disassembly and replacement of specialized clamps when changing the object being tested, which is cumbersome and time-consuming, reducing detection efficiency. Third, lack of equipment protection. The metal clamps are in direct rigid contact with the turbine surface, and improper clamping force control can easily cause damage such as damage to the equipment surface coating and shell indentation, increasing subsequent maintenance costs. Fourth, high operational complexity. It is difficult to accurately control the clamping force manually. Too loose a clamp leads to unstable fixation, while too tight a clamp may affect the normal rotation of the turbine, further interfering with the detection results.

[0020] As wind power technology develops towards larger scale and higher precision, the industry's requirements for the accuracy, efficiency, and equipment protection of noise detection are increasing. Existing clamping structures can no longer meet the needs of large-scale and diversified testing. There is an urgent need for a clamping device that combines stability, adaptability, and protection to provide reliable protection for wind turbine noise detection.

[0021] Combination Figures 1 to 9 As shown, a wind turbine blade noise detection device includes a noise detector 1, and the detection device further includes: The detection chamber 2 is a tube open at both ends. The inner wall of the detection chamber 2 is provided with an arc-shaped guide groove 21, which is inclined to the length direction of the detection chamber 2. The moving part 3 includes an inner ring 31 disposed in the detection cavity 2, a rotating ring 32 rotatably connected to the inner ring 31, and a first driving member 33 connected to the inner ring 31. The rotating ring 32 is provided with a guide post 321 extending into the arc-shaped guide groove 21. The noise detector 1 is disposed on the inner wall of the rotating ring 32. The first driving member 33 is used to drive the inner ring 31 to move along the length direction of the detection cavity 2. The noise detectors 1, which are symmetrically installed on the inner side wall of the rotating ring 32, comprehensively collect noise signals of the bladed turbine at different heights and angles under the combined action of height adjustment and circumferential rotation. The clamping member 4 includes multiple clamping posts 41 passing through the detection cavity 2 and a second driving member 42 connected to the multiple clamping posts 41. Each clamping post 41 has an arc-shaped clamping plate 411 at its end inside the detection cavity 2. The second driving member 42 is used to drive the clamping post 41 to slide on the detection cavity 2 to clamp the turbine. The clamping member 4 allows the arc-shaped clamping plate 411 to be adapted to wind turbines of different specifications from small to large. It can achieve stable clamping for turbine roots of different diameters or blade mounting seats of different sizes.

[0022] As an alternative embodiment, the inner wall of the detection cavity 2 has a vertical groove 22 along its length, and the detection cavity 2 has an annular groove 23. The first driving component 33 includes: a lead screw 331, a lead screw slider 332, and a rotary driving mechanism 333. The lead screw 331 is rotatably connected in the vertical groove 22, and one end of the lead screw 331 extends out of the vertical groove 22 and into the annular groove 23. The lead screw slider 332 is disposed on the inner ring 31 and extends into the vertical groove 22, and is threadedly connected to the lead screw 331. The rotary driving mechanism 33... 3. Set in the annular groove 23, the rotary drive mechanism 333 is connected to the lead screw 331; the rotary drive mechanism 333 drives the lead screw 331 to rotate in the vertical groove 22, and the lead screw 331 drives the lead screw slider 332 to move linearly in the vertical groove 22, so that the lead screw slider 332 drives the inner ring 31 to move up and down, and adjusts the height of the noise detector 1. At the same time, the rotating ring 32 slides with the arc-shaped guide groove 21 through the guide post 321 and rotates on the inner ring 31 to make circumferential rotation around the bladed turbine.

[0023] As an alternative embodiment, the second driving component 42 includes: a slip ring 421, multiple connecting rods 422, and a telescopic driving component 423. The slip ring 421 is sleeved on the detection cavity 2; the multiple connecting rods 422 correspond one-to-one with multiple clamping posts 41, and the two ends of each connecting rod 422 are respectively hinged to the slip ring 421 and the clamping post 41; the telescopic driving component 423 is disposed on the detection cavity 2, and the movable rod of the telescopic driving component 423 is connected to the slip ring 421. Specifically, the telescopic driving component 423 is an electric telescopic rod; the slip ring 421 and the connecting rods 422 form a symmetrical linkage transmission structure, causing the multiple clamping posts 41 to move synchronously towards the center, realizing the centering and clamping of the turbine by the wind turbine arc-shaped clamping plate 411, ensuring that the turbine is always in the center position of the detection cavity 2, and maintaining a stable relative position with the noise detector 1, avoiding detection angle deviation caused by turbine eccentricity. This clamping component 4 has outstanding adaptability. The telescopic drive component 423's telescopic stroke can be flexibly adjusted according to actual needs. By controlling the extension length of the piston rod, the clamping column 41 can be driven to move different distances, allowing the wind turbine clamping ring to adapt to wind turbines of different specifications, from small and medium to large. It can securely clamp turbine roots of different diameters or blade mounting seats of different sizes. Unlike traditional devices, it eliminates the need to replace special clamps due to changes in the specifications of the object being inspected, significantly reducing the time and financial costs associated with equipment replacement. This significantly improves the flexibility and efficiency of inspection operations, making it suitable for large-scale and diverse inspection scenarios. Furthermore, the entire clamping process is automatically driven by the telescopic drive component 423, eliminating the need for manual adjustment. This avoids over- or under-clamping problems caused by uneven manual operation, reducing the labor intensity of operators, further ensuring equipment safety, extending turbine lifespan, reducing maintenance costs for enterprises, and improving the practicality and economy of inspection operations.

[0024] As an alternative embodiment, a first gear 334 is provided on the lead screw 331 inside the annular groove 23, and a gear ring 335 is rotatably connected inside the annular groove 23. The gear ring 335 includes an inner gear ring and an outer gear ring. The inner gear ring of the gear ring 335 meshes with the first gear 334, and a second gear is provided on the rotary drive member 333 to mesh with the outer gear ring. Through this mechanism, the rotary drive member 333 can be placed on the outer wall of the detection cavity 2 to facilitate the subsequent control and maintenance of the device.

[0025] As an alternative embodiment, a fixing ring 5 is provided between the slip ring 421 on the detection cavity 2 and multiple clamping posts 41. Multiple guide rods 51 are provided on the fixing ring 5, and the multiple guide rods 51 pass through the slip ring 421 and are slidably connected to the slip ring 421. The multiple guide rods 51 are arranged in a circular array on the fixing ring 5, and each guide rod 51 has a limiting block at its end away from the fixing ring 5. The guide rods 51 symmetrically arranged on the front surface of the fixing ring 5 and the slip ring 421 form a precise guiding mechanism, which restricts the slip ring 421 to move smoothly only along the axial direction, avoiding the transmission disorder caused by the slip ring 421 offset in the traditional device, and providing a stable basis for subsequent clamping actions. The telescopic drive component 423 serves as a power source, with uniform and controllable output force, driving the slip ring 421 to move at a uniform speed, ensuring that the clamping process is smooth and impact-free.

[0026] As an alternative embodiment, when multiple clamping posts 41 are in the clamping state, the length of each clamping post 41 extending out of the detection cavity 2 exceeds the outer diameter of the slip ring 421; thereby ensuring that the connecting rod 422 will not be in a fully processed parallel groove state with the detection cavity 2 when processing the clamping state, so as to avoid the clamping member 4 from self-locking and ensure that the clamping action can be advanced normally.

[0027] As an alternative embodiment, the inner surfaces of multiple arc-shaped clamping plates 411 are equipped with rubber pads. These rubber pads play a crucial role in the clamping process; their rough surface texture significantly increases the coefficient of friction with the turbine surface, effectively suppressing radial slippage and axial movement during high-speed turbine rotation. Simultaneously, the elastic properties of the rubber material absorb some of the vibrations generated during equipment operation, reducing vibration transmission at the clamping points and preventing vibration interference with noise signal acquisition. Compared to traditional simple clamping devices, this structure completely solves problems such as clamping offset and slippage, enabling the noise detector to accurately collect noise data at different heights and angles. The repeatability and reliability of the detection results are significantly improved, fully meeting the stringent standards of the wind power industry for noise detection accuracy, and providing accurate data support for equipment performance evaluation and fault diagnosis.

[0028] The working principle and usage method of this embodiment: This invention provides a wind turbine blade noise detection device. When the device is not in operation, the telescopic drive component 423 is in a retracted state. Since the front end of the telescopic drive component 423 is fixed to the slip ring 421, the slip ring 421 is positioned close to the fixed ring 5. At this time, the clamping column 41 is pulled by the connecting rod 422 on the slip ring 421, causing the two clamping columns 41 to move away from each other. Finally, the arc-shaped clamping plate 411 installed at the opposite end of the clamping column 41 is also in an open state, waiting for the bladed turbine to be placed. When the bladed turbine to be tested is placed in the center position of the detection chamber 2, the telescopic drive component 423 is activated. The piston rod of the telescopic drive component 423 extends forward, pushing the slip ring 421 connected to it to slide forward along the guide rod 51 symmetrically fixed on the front surface of the fixed ring 5. The guide rod 51 passes through the through hole on the slip ring 421, ensuring the smooth and accurate movement of the slip ring 421. As the slip ring 421 moves forward, it drives the connecting rod 422 to move. Since the rear end of the connecting rod 422 is rotatably connected to the clamping column 41 through the rotating groove, and the clamping column 41 itself is restricted to sliding horizontally within the detection cavity 2, the movement of the connecting rod 422 is converted into a thrust on the clamping column 41. Under this thrust, multiple clamping columns 41 move along the sliding groove toward the center of the detection cavity 2. Finally, the arc-shaped clamping plate 411 installed at the end of the clamping column 41 will gradually approach from both sides and finally clamp the root of the bladed turbine or the designated position. The inner side wall of the arc-shaped clamping plate 411 is fixedly connected with a rubber pad, thereby completing the fixed positioning of the bladed turbine.

[0029] Then, the rotary drive mechanism 333 is activated. The output end of the rotary drive mechanism 333 drives the second gear to rotate, which in turn drives the gear ring 335 to rotate. The gear ring 335 drives the first gear 334 to rotate, which in turn drives the lead screw 331 to rotate synchronously in the vertical groove 22. The rotation of the lead screw 331 is converted into the linear motion of the lead screw slider 332 in the vertical groove 22, causing the lead screw slider 332 to move the inner ring 31 up and down, thereby adjusting the height of the noise detector 1. At the same time, the rotating ring 32 slides on the inner ring 31 through the guide post 321 and the arc-shaped guide groove 21, rotating circumferentially around the bladed turbine. At this time, the noise detectors 1, which are symmetrically installed on the inner wall of the rotating ring 32, comprehensively collect noise signals from the bladed turbine at different heights and angles under the combined effect of height adjustment and circumferential rotation. After the detection is completed, the rotary drive mechanism 333 is turned off, all components are reset, and the bladed turbine can be removed and the noise detection data 1 can be exported, completing the entire detection process.

[0030] After the test is completed, the piston rod of the telescopic drive 423 retracts, and through the opposite transmission path, it drives the slip ring 421 to move backward. The connecting rod 422 pulls the clamping column 41 and the arc-shaped clamping plate 411 back to the initial open position so that the operator can safely remove the bladed turbine.

[0031] The above embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit them. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions implemented in the present invention, and should all be covered within the protection scope of the present invention.

Claims

1. A noise detection device for wind turbine blades, comprising a noise detector, characterized in that, The detection device also includes: The detection chamber is a tube open at both ends. The inner wall of the detection chamber is provided with an arc-shaped guide groove, which is inclined to the length direction of the detection chamber. The moving part includes an inner ring disposed in the detection cavity, a rotating ring rotatably connected to the inner ring, and a first driving member connected to the inner ring. The rotating ring is provided with a guide post extending into an arc-shaped guide groove. The noise detector is disposed on the inner wall of the rotating ring. The first driving member is used to drive the inner ring to move along the length direction of the detection cavity. The clamping component includes multiple clamping posts that pass through the detection cavity and a second driving component connected to the multiple clamping posts. Each clamping post has an arc-shaped clamping plate at its end located inside the detection cavity. The second driving component is used to drive the clamping post to slide on the detection cavity to clamp the turbine.

2. The wind turbine blade noise detection device as described in claim 1, characterized in that, The inner wall of the detection cavity has a vertical groove along its length, and the detection cavity has an annular groove. The first driving component includes: A lead screw is rotatably connected in a vertical groove, with one end of the lead screw passing through the vertical groove and extending into an annular groove. The lead screw slider is set on the inner ring and extends into the vertical groove to be threadedly connected to the lead screw. The rotary drive mechanism is located in the annular groove and connected to the lead screw.

3. The wind turbine blade noise detection device as described in claim 1, characterized in that, The second driving element includes: A slip ring is fitted onto the detection cavity; Multiple connecting rods correspond one-to-one with multiple clamping posts, and the two ends of each connecting rod are respectively hinged to a slip ring and a clamping post; A telescopic drive component is installed on the detection chamber, and the movable rod of the telescopic drive component is connected to a slip ring.

4. The wind turbine blade noise detection device as described in claim 2, characterized in that, The lead screw in the annular groove is provided with a first gear, and a gear ring is rotatably connected in the annular groove. The gear ring has an inner gear ring and an outer gear ring. The inner gear ring of the gear ring meshes with the first gear, and the rotary drive is provided with a second gear that meshes with the outer gear ring.

5. The wind turbine blade noise detection device as described in claim 3, characterized in that, A fixing ring is provided between the slip ring on the detection chamber and multiple clamping posts. Multiple guide rods are provided on the fixing ring, and the multiple guide rods pass through the slip ring and are slidably connected to the slip ring.

6. The wind turbine blade noise detection device as described in claim 3, characterized in that, When the multiple clamping posts are in a clamping state, the length of each clamping post extending out of the detection cavity exceeds the outer diameter of the slip ring.

7. The wind turbine blade noise detection device as described in claim 5, characterized in that, Multiple guide rods are arranged in a circular array on the fixed ring, and each guide rod has a limiting block at its end away from the fixed ring.

8. The wind turbine blade noise detection device as described in claim 1, characterized in that, The inner surfaces of the multiple arc-shaped clamps are provided with rubber pads.

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