Flexible bearing mechanism of ultrasonic probe for fan blades

Abstract

The present invention discloses a flexible support mechanism for an ultrasonic probe for a wind turbine blade, comprising: a frame; rollers mounted on both sides of the frame for rolling contact with the surface of the wind turbine blade; ultrasonic detection units located on the front side of the frame, with multiple ultrasonic detection units arranged vertically; flexible springs extending along the arrangement direction of the ultrasonic detection units and corresponding to the two wings of the ultrasonic detection units, with the two wings of each ultrasonic detection unit connected to the corresponding flexible spring; and elastic expansion and contraction assemblies, wherein the multiple ultrasonic detection units are divided into several groups, with both ends of at least one ultrasonic detection unit in each group connected to the frame via elastic expansion and contraction assemblies. This mechanism enables the use of a larger number of ultrasonic probes for simultaneous detection, significantly improving the flexibility, coupling, and stability of the ultrasonic probes.

Description

Technical Field

[0001] The present invention relates to the technical field of fan blade detection, and in particular to a flexible bearing mechanism of an ultrasonic probe for detecting fan blades. Background Art

[0002] Wind turbine blades are mostly manufactured by infusion and assembly. The blade shell and web are manufactured separately, connected with structural adhesive, and then molded and cured to form an integral blade. Due to factors such as technology and production process, various defects such as porosity, delamination and inclusions may occur during the manufacturing process.

[0003] The main non-destructive detection methods for wind turbine blade defects include X-ray, ultrasound, acoustic emission, fiber optic sensors, infrared thermal imaging detection technology, etc. Each detection method has its own advantages and limitations.

[0004] Ultrasonic testing methods detect reflected waves from damage when ultrasound waves pass through a material and are received on the opposing surface. Ultrasonic technology is one of the most widely used nondestructive testing techniques in industry. This method relies on the propagation and reflection of elastic waves within blades. Depending on the material or structure, specific reflection, attenuation, resonance, and transmission patterns are obtained, allowing the size, location, and other information of the damage to be assessed through these patterns.

[0005] Ultrasonic technology is widely used to investigate internal structural damage (e.g., delamination, debonding, etc.). It can detect damage as small as a few millimeters in length, with the transmission time indicating the damage location and the amplitude assessing the severity. Ultrasonic technology can also provide information on the depth of damage. However, during inspection, the ultrasonic probe must be in contact with the surface of the wind turbine blade and coupled with a coupling agent, which has a crucial impact on inspection accuracy.

[0006] Since the surface of the fan blade is curved, in order to ensure that the ultrasonic probe can fully contact the surface of the fan blade, only a small number of ultrasonic probes can be used during detection. The area scanned each time is very limited, resulting in low detection efficiency and high labor intensity. If a large number of ultrasonic probes are used at one time, the flexibility, coupling and stability of these ultrasonic probes will deteriorate, making it difficult to achieve the expected detection effect. Summary of the Invention

[0007] The present invention aims to provide a flexible bearing mechanism for ultrasonic probes of wind turbine blades, which can use a larger number of ultrasonic probes for simultaneous detection and significantly improve the flexibility, coupling and stability of the ultrasonic probes.

[0008] To achieve the above-mentioned object, the present invention provides a flexible bearing mechanism for a fan blade ultrasonic probe, comprising:

[0009] frame;

[0010] Rollers are mounted on both sides of the frame and are used to contact the surface of the fan blades during testing;

[0011] An ultrasonic detection unit is located at the front side of the frame, and a plurality of the ultrasonic detection units are arranged and distributed in a vertical direction to form a vertical ultrasonic probe array;

[0012] Flexible spring sheets extend along the arrangement direction of the ultrasonic detection units and correspond to the two wings of the ultrasonic detection units respectively, and the two wings of each ultrasonic detection unit are connected to the corresponding flexible spring sheets respectively;

[0013] An elastic telescopic component, wherein the plurality of ultrasonic detection units are divided into several groups, and both ends of at least one ultrasonic detection unit in each group of ultrasonic detection units are respectively connected to the frame through an elastic telescopic component.

[0014] Optionally, the elastic telescopic component includes a guide seat, a joint, a spring and a guide rod, the guide seat is connected to the frame, the joint is connected to the end of the ultrasonic detection unit, the spring and guide rod are located between the guide seat and the joint, and the joint can elastically telescope relative to the guide seat.

[0015] Optionally, the guide rod of each elastic telescopic component includes an upper guide rod and a lower guide rod, the spring is located between the upper guide rod and the lower guide rod, the front end of each guide rod is fixedly connected to the joint, and the rear end of each guide rod is slidingly engaged with the guide hole of the guide seat.

[0016] Optionally, the guide seat is provided with a spring hole, the joint is connected to a guide pin extending into the spring hole, the spring is sleeved on the outside of the guide pin, the rear part of the guide seat is provided with a spring guide tube corresponding to the spring hole and extending backward, the front end of the spring is supported on the joint, and the rear end of the spring is supported on the inner end of the spring guide tube.

[0017] Optionally, the connector is connected to an end of the ultrasonic detection unit via a rotating shaft and a bearing.

[0018] Optionally, the elastic telescopic component located in the middle position in the vertical direction is the middle elastic telescopic component, and the remaining elastic telescopic components are side elastic telescopic components; the guide seat of the middle elastic telescopic component is fixedly connected to the frame, and the side elastic telescopic components are arranged in sequence upward and downward with the middle elastic telescopic component as the center, and their guide seats are rotatably connected to the frame through bearings.

[0019] Optionally, each of the ultrasonic detection units includes a bracket, a support and an ultrasonic probe, the bracket being provided with a receiving space with an opening facing the front side, the ultrasonic probe being installed in the receiving space through the bracket, a sliding component that slides along the front-to-back direction is provided between the bracket and the bracket, the bracket is provided with rolling contact components located on both sides of the opening of the receiving space, an elastic component that supports the ultrasonic probe and the bracket to float along the sliding direction is provided between the rear end of the bracket and the bracket; the bracket is provided with a coupling agent inlet, a coupling agent flow channel and a coupling agent outlet.

[0020] Optionally, a guide component is provided between the bracket and the support to guide the ultrasonic probe and the bracket to float along the sliding direction.

[0021] Optionally, the guide component includes a guide bearing located on the upper surface of the bracket and arranged horizontally, and the guide bearing is in contact with and rolling engagement with the side of the bracket that is higher than the bracket.

[0022] Optionally, the sliding component includes sliding bearings provided on both sides of the bracket, and the bracket is provided with a sliding groove on the inner wall of the accommodating space thereof, which is slidably matched with the sliding bearings.

[0023] Optionally, the rolling contact component includes horizontally arranged rolling bearings, and the rolling bearings are distributed at the upper and lower parts of both sides of the opening of the accommodating space.

[0024] Optionally, a position detection element is provided, and the position detection element is used to detect the position of the ultrasonic detection unit on the wind turbine blade.

[0025] Optionally, the position detection element is a rotary encoder mounted on the roller.

[0026] Optionally, the frame is arranged on the mounting frame, a vertical swing axis is provided at the rear of the mounting frame, the mounting frame can swing in the left and right directions, the frame is connected to the mounting frame through a horizontal swing axis, and the frame can swing up and down relative to the mounting frame.

[0027] The flexible supporting mechanism of the ultrasonic probe for fan blades provided by the present invention has multiple ultrasonic detection units arranged and distributed in the vertical direction to form a vertical array of ultrasonic detection units. Since the ultrasonic detection units are connected by flexible spring sheets, and the flexible spring sheets can deform along with the fan blades, a larger number of ultrasonic detection units can be used to detect the fan blades. Moreover, on this basis, the ultrasonic detection unit array provided on the flexible spring sheets is further connected to the frame by an elastic telescopic component. The elastic telescopic component has the ability to stretch back and forth, and can support local ultrasonic detection units to approach or move away from the surface of the fan blades. Under the synergistic effect of elastic expansion and flexible deformation, each ultrasonic detection unit can obtain a better fitting effect. When scanning, the entire supporting mechanism can be moved laterally on the surface of the fan blades through the rollers of the frame, and can scan a larger area. It has good flexibility, coupling and stability during the scanning process, thereby obtaining more accurate detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic structural diagram of a flexible bearing mechanism of an ultrasonic probe for a fan blade provided by an embodiment of the present invention;

[0029] Figure 2 for Figure 1 A top view of the flexible supporting mechanism of the ultrasonic probe of the fan blade is shown;

[0030] Figure 3 for Figure 1 A side view of the flexible supporting mechanism of the ultrasonic probe of the fan blade is shown;

[0031] Figure 4 for Figure 1 Axonometric view of the elastic expansion and contraction assembly shown in FIG.

[0032] Figure 5 for Figure 4 A cross-sectional view of the side elastic telescopic component shown;

[0033] Figure 6 for Figure 1 An axonometric view of the middle elastic telescopic component shown in ;

[0034] Figure 7 for Figure 1 The side view of the wind turbine blade ultrasonic probe flexible bearing mechanism when it is set on the mounting frame;

[0035] Figure 8 for Figure 1 A schematic structural diagram of an ultrasonic detection unit is shown in FIG;

[0036] Figure 9 for Figure 8AA rotation diagram of the ultrasonic detection unit shown;

[0037] Figure 10 for Figure 8 A front view schematic diagram of the ultrasonic detection unit shown;

[0038] Figure 11 for Figure 10 A left side view of the ultrasonic detection unit shown;

[0039] Figure 12 for Figure 10 BB view of the ultrasonic detection unit shown;

[0040] Figure 13 for Figure 10 CC view of the ultrasonic detection unit shown;

[0041] Figure 14 for Figure 8 An axonometric view of the ultrasonic testing unit shown;

[0042] Figure 15 for Figure 14 A partial enlarged view of the first couplant outlet and the vertical couplant slot shown in FIG;

[0043] Figure 16 for Figure 14 A partial enlarged view of the second coupling agent outlet is shown in FIG.

[0044] In the picture:

[0045] 1. Frame 11. Frame opening 2. Roller 3. Ultrasonic detection unit 4. Stainless steel spring 5. Elastic expansion joint 51. Middle elastic expansion joint 52. Side elastic expansion joint 521. Guide seat 522. Joint 523. Spring 524. Guide rod 525. Rotating shaft 526. Rotating fisheye joint bearing 527. Guide pin 528. Spring guide tube 529. Bearing 6. Coupling 7. Rotary encoder 8. Mounting bracket 81. Vertical swing shaft 82. Horizontal swing shaft 91. Main water inlet joint 92. First water distribution joint 93. Second water distribution joint 94. Cable tie holder

[0046] 31. Bracket 311. Left support plate 3111. Couplant groove 312. Right support plate 32. Bracket 321. Rear fixing plate 3211. Through hole 3212. Open groove 3213. Hole 322. Left bracket body 3221. First step surface 3222. Second step surface 323. Right bracket body 324. Left connector 325. Right connector 3241, 3251. Groove 33. Ultrasonic probe 34. Sliding bearing 35. Slide groove 361. First spring 362. Second spring 37. Guide bearing 38. Rolling bearing 391. First couplant flow channel 3911. First couplant inlet 3912. First couplant outlet 392. Second couplant flow channel 3921. Second couplant inlet 3922. Second couplant outlet DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0048] In this article, terms such as "upper, lower, inside, outside" are established based on the positional relationships shown in the drawings. Depending on the different drawings, the corresponding positional relationships may also change accordingly. Therefore, they cannot be understood as absolute limitations on the scope of protection; moreover, relational terms such as "first" and "second" are only used to distinguish one component from another with the same name, and do not necessarily require or imply any actual relationship or order between these components.

[0049] Please refer to Figures 1 to 3 , Figure 1 A schematic structural diagram of a flexible bearing mechanism of an ultrasonic probe for a fan blade provided by an embodiment of the present invention; Figure 2 for Figure 1 A top view of the flexible supporting mechanism of the ultrasonic probe of the fan blade is shown; Figure 3 for Figure 1 A side view of the flexible supporting mechanism of the wind turbine blade ultrasonic probe is shown.

[0050] In a specific embodiment, the flexible bearing mechanism of the wind turbine blade ultrasonic probe provided by the present invention is mainly composed of a frame 1, a roller 2, an ultrasonic detection unit 3, a stainless steel spring 4 and an elastic telescopic component 5.

[0051] The frame 1 is generally rectangular in shape, and has a frame opening 11 running through it from front to back. The left and right frames of the frame 1 are respectively equipped with two rollers 2 on the outside through brackets, for a total of four rollers 2, so that they can contact the surface of the wind turbine blades in a rolling manner during inspection. The rotating shafts of the two rollers 2 on the left frame are connected by a coupling 6 and can rotate synchronously, while the rotating shafts of the two rollers 2 on the right frame are independent of each other and are not connected.

[0052] Of the two rollers 2 on the left frame, the upper roller 2 is equipped with a rotary encoder 7. When the roller 2 rotates, the rotary encoder 7 rotates synchronously, thereby measuring the distance from the starting point to the detection position, correlating the detection information with the image information, and thus determining the location of the defect or damage. Of course, other types of sensors besides the rotary encoder 7 can also be used to determine the location of the defect or damage.

[0053] The ultrasonic detection unit 3 corresponds to the frame opening 11 of the frame 1 and is located in front of the frame opening 11. Multiple ultrasonic detection units 3 (twenty-seven in this embodiment) are arranged and distributed along the vertical direction to form a vertical ultrasonic detection unit array.

[0054] Each ultrasonic detection unit 3 has two wings extending laterally to the left and right. In order to connect the ultrasonic detection units 3 to each other, two vertical stainless steel springs 4 are provided on the two wings of the ultrasonic detection unit 3. The stainless steel springs 4 extend along the arrangement direction of the ultrasonic detection units 3. The left and right stainless steel springs 4 are located in the same plane and parallel to the plane where the frame 1 is located, and correspond to the two wings of the ultrasonic detection unit 3 respectively. The two wings of each ultrasonic detection unit 3 can be screwed to the stainless steel spring 4 respectively, thereby flexibly connecting the twenty-seven ultrasonic detection units 3 so that they can deform as a whole according to the shape of the fan blades to achieve adaptive adjustment.

[0055] The flexible ultrasonic detection unit array is further mounted on the frame 1 via an elastic telescopic component 5 . The multiple ultrasonic detection units 3 are divided into several groups. Both ends of an ultrasonic detection unit 3 in each group are connected to the frame 1 via an elastic telescopic component 5 .

[0056] Please refer to Figures 4 to 6 , Figure 4 for Figure 1 Axonometric view of the elastic expansion and contraction assembly shown in FIG. Figure 5 for Figure 4 A cross-sectional view of the side elastic telescopic component shown; Figure 6 for Figure 1 Axonometric view of the middle elastic telescopic component shown in .

[0057] The two elastic telescopic components 5 located in the middle position in the vertical direction are middle elastic telescopic components 51, and the remaining eight elastic telescopic components are side elastic telescopic components 52. The side elastic telescopic components 52 are arranged in sequence upward and downward with the middle elastic telescopic component 51 as the center, with four side elastic telescopic components 52 arranged above and four side elastic telescopic components 52 arranged below.

[0058] Taking the edge elastic telescopic component 52 as an example, it is mainly composed of a guide seat 521, a joint 522, a spring 523 and a guide rod 524. The guide seat 521 is connected to the frame 1, and the joint 522 is connected to the end of the ultrasonic detection unit 3 through a rotating shaft 525 and a rotating fisheye joint bearing 526. The spring 523 and the guide rod 524 are located between the guide seat 521 and the joint 522, and the joint 522 can elastically telescope relative to the guide seat 521.

[0059] The guide rod 524 is divided into two parallel guide rods, the spring 523 is located between the two guide rods 524, the front end of each guide rod 524 is fixedly connected to the joint 522, and the rear end of each guide rod 524 is slidably matched with the guide hole of the guide seat 521 and is provided with a linear bearing.

[0060] The guide seat 521 is provided with a spring hole, the joint 522 is connected to a guide pin 527 extending into the spring hole, the spring 523 is sleeved on the outside of the guide pin 527, and the rear part of the guide seat 521 is provided with a spring guide tube 528 corresponding to the spring hole and extending backward. The front end of the spring 523 is supported by the joint 522, and the rear end of the spring 523 is supported by the inner end of the spring guide tube 528.

[0061] The structure of the middle elastic telescopic assembly 51 is similar to that of the side elastic telescopic assembly 52. ​​The difference is that for the middle elastic telescopic assembly 51, the frame opening 11 is retracted inward a certain distance, and its guide seat is fixedly connected to the left and right edges of the indented frame opening 11. In contrast, for the side elastic telescopic assembly 52, its guide seat 521 is equipped with bearings 529 and is rotatably connected to the left and right edges of the frame opening 11 through the bearings 529, allowing it to swing up and down and float, thereby eliminating the cumulative error caused by sensor installation. When viewed from a top view, the guide rods of the middle elastic telescopic assembly 51 and the side elastic telescopic assembly 52 are offset from each other by a certain distance.

[0062] The frame 1 is provided with a main water inlet joint 91 and a first water diversion joint 92, and the rear end of the guide seat 521 is provided with a second water diversion joint 93 and a tie seat 94, so that the water used as the coupling agent can be transported to each ultrasonic detection unit 3 through the main water inlet joint 91, the first water diversion joint 92, and the second water diversion joint 93, and the pipelines can be bundled and managed by ties.

[0063] like Figure 7 As shown, the frame 1 can be mounted on a mounting frame 8. A vertical swing shaft 81 is provided at the rear of the mounting frame 8, allowing the mounting frame 8 to swing left and right. Horizontal swing shafts 82 are provided on the left and right sides of the frame 1. The frame 1 is connected to the mounting frame 8 via the horizontal swing shafts 82, allowing the frame 1 to swing up and down relative to the mounting frame 8. In this way, the flexible ultrasonic detection unit array has the freedom to swing in two directions, so that it can better fit the fan blades through self-adaptation.

[0064] Please refer to Figures 8 to 11 , Figure 8 for Figure 1 A schematic structural diagram of an ultrasonic detection unit is shown in FIG; Figure 9 for Figure 8 AA rotation diagram of the ultrasonic detection unit shown; Figure 10 for Figure 8 A front view schematic diagram of the ultrasonic detection unit shown; Figure 11 for Figure 10 Left side view of the ultrasonic detection unit shown.

[0065] As shown in the figure, in a specific embodiment, the wind turbine blade ultrasonic detection unit 3 provided by the present invention is mainly composed of three parts: a bracket 31, a support 32 and an ultrasonic probe 33, wherein the bracket 31 is divided into a left support plate 311 and a right support plate 312 arranged vertically, and the left support plate 311 and the right support plate 312 are respectively located on the left and right sides of the ultrasonic probe 33, and are fixedly connected to the ultrasonic probe 33. The three are installed on the bracket 32 ​​as a whole.

[0066] The bracket 32 ​​is mainly composed of a rear fixing plate 321, a left bracket body 322, a right bracket body 323, a left connecting body 324 and a right connecting body 325. The rear ends of the left bracket body 322 and the right bracket body 323 are fixedly connected to the rear fixing plate 321. The accommodating space formed between the left bracket body 322 and the right bracket body 323 is used to place the ultrasonic probe 33 with the bracket 31. The left connecting body 324 and the right connecting body 325 are respectively located on the outside of the left bracket body 322 and the right bracket body 323.

[0067] The top projections of the left connector 324 and the right connector 325 are symmetrical "L" shapes. Grooves 3241 and 3251 are provided on the front of the left connector 324 and the right connector 325, so that the detection unit can be installed on the stainless steel spring 4 through the grooves. At the same time, the ends of the left connector 324 and the right connector 325 are provided with connection holes, which can be externally connected to the ultrasonic probe drive mechanism.

[0068] After the ultrasonic probe 33 is installed on the bracket 32 ​​through the bracket 31, it is generally flat in shape. This structural form allows multiple detection units to be distributed in an array in the form of layers stacked together with appropriate gaps, thereby forming an ultrasonic detection matrix to cover a wider size at the same time. During detection, these ultrasonic probes work simultaneously and can scan a larger detection area through lateral movement, thereby significantly improving detection efficiency.

[0069] Since the surface of the fan blade is a curved surface, in order to enable the ultrasonic probe 33 to accurately contact the surface of the fan blade, the ultrasonic probe 33 is designed to be able to float back and forth.

[0070] Please refer to Figure 12 、 Figure 13 , Figure 12 for Figure 10 BB view of the ultrasonic detection unit shown; Figure 13 for Figure 10 CC view of the ultrasonic detection unit shown.

[0071] The left bracket body 322 and the right bracket body 323 have an opening toward the front for accommodating space, and the ultrasonic probe 33 is installed in the accommodating space through the bracket 31. Sliding components are provided between the bracket 31 and the left bracket body 322 and the right bracket body 323 to enable the bracket 31 and the ultrasonic probe 33 to slide in the front-to-back direction relative to the bracket 32. At the same time, an elastic component is provided between the rear end of the bracket 31 and the bracket 32 ​​to support the ultrasonic probe 33 and the bracket 31 so that the ultrasonic probe 33 and the bracket 31 can float in the sliding direction.

[0072] Specifically, two sliding bearings 34 are provided on the outer side of each of the left and right support plates 311 and 312. Transverse oblong grooves 35 are provided on the inner walls of each of the left and right support bodies 322 and 323. The two sliding bearings 34 on each side slide into their corresponding grooves 35 for sliding engagement, thereby enabling forward and backward sliding. Because the grooves 35 are located on the inner sides of the left and right support bodies 322 and 323, after assembly, the sliding bearings 34 and grooves 35 are concealed and do not appear to be visible.

[0073] The elastic component is divided into a first spring 361 located between the left support plate 311 and the rear fixing plate 321, and a second spring 362 located between the right support plate 312 and the rear fixing plate 321. By providing two parallel springs, the ultrasonic probe 33 and the bracket 31 can be effectively supported, ensuring that the ultrasonic probe 33 and the bracket 31 have sufficient elasticity to float.

[0074] In order to ensure the floating stability of the ultrasonic probe 33 and the bracket 31 , a guide component is provided between the bracket 31 and the support 32 to guide the ultrasonic probe 33 and the bracket 31 to float along the sliding direction.

[0075] In this embodiment, the guide component is a guide bearing 37 located on the upper surface of the left bracket body 322 and the right bracket body 323 and arranged horizontally. There are two guide bearings 37 on each side. The left support plate 311 and the right support plate 312 are higher than the left bracket body 322 and the right bracket body 323 by a certain distance. The two guide bearings 37 on the left side are in contact with and rolling fit with the side of the left support plate 311 that is higher than the left bracket body 322, and the two guide bearings 37 on the right side are in contact with and rolling fit with the side of the right support plate 312 that is higher than the right bracket body 323.

[0076] By setting up the guide bearing 37, the freedom of the ultrasonic probe 33 and the bracket 31 to deviate left and right can be limited, thereby playing a guiding role, so that the ultrasonic probe 33 and the bracket 31 can float stably in the front and back directions, avoiding the phenomenon of affecting the detection accuracy due to skew.

[0077] In addition, the bracket 32 ​​is provided with rolling contact components located on both sides of the accommodating space opening. In this embodiment, the rolling contact components are four horizontally arranged rolling bearings 38, which are distributed at the upper and lower portions of both sides of the accommodating space opening. The left bracket body 322 and the right bracket body 323 are each provided with two stepped surfaces. Taking the left bracket body 322 as an example, it has a first stepped surface 3221 and a second stepped surface 3222. The guide bearing 37 is located on the first stepped surface 3221, and the rolling bearing 38 is located on the second stepped surface 3222. By designing the two stepped surfaces, the overall thickness of the detection unit can be minimized, making the detection unit structure more compact and facilitating array distribution.

[0078] In the non-operating state, the front end surfaces of the ultrasonic probe 33 and the bracket 31 are slightly higher than the plane defined by the contact points of the four rolling bearings 38. When the ultrasonic probe 33 and the bracket 31 come into contact with the fan blades, the first spring 361 and the second spring 362 are compressed under the action of the contact pressure, causing the ultrasonic probe 33 and the bracket 31 to float backward, causing the four rolling bearings 38 to come into contact with the fan blades. After the coupling agent is introduced, a thin film of coupling agent is formed between the ultrasonic probe 33 and the bracket 31 and the fan blades. When the detection unit moves relative to the fan blades for scanning, the four rolling bearings 38 roll on the surface of the fan blades, thereby preventing damage to the fan blades.

[0079] Please continue to refer to Figures 14 to 16 , Figure 14 for Figure 8 An axonometric view of the ultrasonic testing unit shown; Figure 15 for Figure 14 A partial enlarged view of the first couplant outlet and the vertical couplant slot shown in FIG; Figure 16 for Figure 14 A partial enlarged view of the second coupling agent outlet is shown in FIG.

[0080] In order to introduce the coupling agent, the bracket 31 is provided with a coupling agent flow channel, a coupling agent inlet is provided at the rear of the bracket 31, and a coupling agent outlet is provided at the front of the bracket 31.

[0081] The coupling agent flow channel is divided into a first coupling agent flow channel 391 and a second coupling agent flow channel 392 , and the two coupling agent flow channels are located inside the left supporting plate 311 and the right supporting plate 312 respectively.

[0082] The first couplant flow channel 391 is located near the top of the left support plate 311. It is a transverse channel with a pagoda connector at its rear end, forming a first couplant inlet 3911 that can be connected to a corresponding couplant pipe. Its front end is a first couplant outlet 3912, located near the upper edge of the contact surface of the ultrasonic probe 33. A vertical couplant groove 3111 is provided on the inner side of the front end of the left support plate 311, adjacent to the ultrasonic probe. The first couplant outlet 3912 communicates with the couplant groove 3111. After the couplant enters the couplant groove 3111 from the first couplant flow channel 391, it diffuses vertically to the right, forming a couplant layer covering the ultrasonic probe 33.

[0083] The second couplant flow channel 392 is located near the top of the right support plate 312. It is also a transverse channel. Its rear end is equipped with a pagoda connector, forming a second couplant inlet 3921 that can be connected to a corresponding couplant pipe. Its front end is a second couplant outlet 3922, located near the upper edge of the opposite side of the contact surface of the ultrasonic probe 33. The second couplant outlet 3922 faces inward, and the couplant discharge direction covers the upper edge of the ultrasonic probe 33. After the couplant enters the couplant groove 3111 from the first couplant flow channel 391, it diffuses downward in a transverse range, forming a couplant layer covering the ultrasonic probe 33.

[0084] By diffusing the coupling agent in both the horizontal and vertical directions, a coupling agent layer with uniform thickness and distribution can be formed between the ultrasonic probe 33, the bracket 31 and the fan blade, avoiding the coupling agent blind area, thereby further improving the accuracy of detection.

[0085] The rear fixing plate 321 of the bracket 32 ​​is provided with a through hole 3211 in the middle for passing the ultrasonic probe cable, two open slots 3212 for passing the coupling agent pipe, and holes 3213 for installing the first spring and the second spring.

[0086] The flexible support mechanism for the ultrasonic probe of a wind turbine blade provided by the present invention has been described in detail above. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only intended to help understand the core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. The flexible bearing mechanism of the ultrasonic probe for fan blades is characterized by: include: frame; Rollers are mounted on both sides of the frame and are used for rolling contact with the surface of the fan blades during testing; An ultrasonic detection unit is located at the front side of the frame, and a plurality of the ultrasonic detection units are arranged and distributed in a vertical direction to form a vertical ultrasonic detection unit array; Flexible spring sheets extend along the arrangement direction of the ultrasonic detection units and correspond to the two wings of the ultrasonic detection units respectively, and the two wings of each ultrasonic detection unit are connected to the corresponding flexible spring sheets respectively; Elastic telescopic assembly, the plurality of ultrasonic detection units are divided into several groups, each group of the ultrasonic detection unit at least one of the ultrasonic detection unit at both ends are connected to the frame by an elastic telescopic assembly; The elastic telescopic assembly includes a guide seat, a joint, a spring and a guide rod, the guide seat is connected to the frame, the joint is connected to the end of the ultrasonic detection unit, the spring and the guide rod are located between the guide seat and the joint, and the joint can be elastically telescopic relative to the guide seat; Each of the ultrasonic detection units includes a bracket, a support and an ultrasonic probe. The bracket is provided with a storage space with an opening facing the front side. The ultrasonic probe is installed in the storage space through the bracket. A sliding component that slides along the front-to-back direction is provided between the bracket and the support. The bracket is provided with rolling contact components located on both sides of the opening of the storage space. An elastic component that supports the ultrasonic probe and the bracket to float along the sliding direction is provided between the rear end of the bracket and the bracket; the bracket is provided with a coupling agent inlet, a coupling agent flow channel and a coupling agent outlet.

2. The flexible bearing mechanism of the wind turbine blade ultrasonic probe according to claim 1, characterized in that: The guide rods of each elastic telescopic assembly include an upper guide rod and a lower guide rod, the spring is located between the upper guide rod and the lower guide rod, the front end of each guide rod is fixedly connected to the joint, and the rear end of each guide rod is slidably matched with the guide hole of the guide seat.

3. The flexible bearing mechanism of the wind turbine blade ultrasonic probe according to claim 2, characterized in that: The guide seat is provided with a spring hole, the joint is connected to a guide pin extending into the spring hole, the spring is sleeved on the outside of the guide pin, the rear part of the guide seat is provided with a spring guide tube corresponding to the spring hole and extending backward, the front end of the spring is supported by the joint, and the rear end of the spring is supported by the inner end of the spring guide tube.

4. The flexible bearing mechanism of the wind turbine blade ultrasonic probe according to claim 1, characterized in that: The joint is connected to the end of the ultrasonic detection unit through a rotating shaft and a bearing.

5. The flexible bearing mechanism of the wind turbine blade ultrasonic probe according to claim 4, characterized in that: The elastic telescopic component includes a middle elastic telescopic component and a side elastic telescopic component; the middle elastic telescopic component is located in the middle position in the vertical direction, and its guide seat is fixedly connected to the frame; the side elastic telescopic components are arranged in an upward and downward order with the middle elastic telescopic component as the center, and their guide seats are rotatably connected to the frame through bearings.

6. The flexible bearing mechanism of the wind turbine blade ultrasonic probe according to claim 1, characterized in that: A guide component is provided between the bracket and the support for guiding the ultrasonic probe and the bracket to float along the sliding direction.

7. The flexible bearing mechanism of the wind turbine blade ultrasonic probe according to claim 6, characterized in that: The guide component includes a guide bearing located on the upper surface of the bracket and arranged horizontally. The guide bearing is in contact with and rolling fit with the side surface of the bracket that is higher than the bracket.

8. The flexible bearing mechanism of the wind turbine blade ultrasonic probe according to claim 1, characterized in that: The sliding component includes sliding bearings arranged on both sides of the bracket, and the bracket is provided with a sliding groove on the inner wall of the accommodating space thereof, which is slidably matched with the sliding bearings.

9. The flexible bearing mechanism of the wind turbine blade ultrasonic probe according to claim 1, characterized in that: The rolling contact component includes horizontally arranged rolling bearings, and the rolling bearings are distributed at the upper and lower parts of both sides of the opening of the accommodating space.

10. The flexible bearing mechanism of a wind turbine blade ultrasonic probe according to any one of claims 1 to 9, characterized in that: A position detection element is provided, and the position detection element is used to detect the position of the ultrasonic detection unit on the fan blade.

11. The flexible bearing mechanism of the wind turbine blade ultrasonic probe according to claim 10, characterized in that: The position detection element is a rotary encoder installed on the roller.

12. The flexible bearing mechanism of a wind turbine blade ultrasonic probe according to any one of claims 1 to 9, characterized in that: The frame is arranged on the mounting frame, and a vertical swing shaft is provided at the rear of the mounting frame, and the mounting frame can swing in the left and right directions. The frame is connected to the mounting frame through a horizontal swing shaft, and the frame can swing up and down relative to the mounting frame.

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