A coating wear tester

Abstract

The application discloses a kind of coating wear testing machines, belong to coating wear testing technical field, including base, the two sides of the top of the base are respectively connected with jet assembly and optical detection assembly, the jet assembly includes sand collecting tank connected to the top of the base one side, the top of the sand collecting tank is buckled with erosion tank, in the application, clay is used to strengthen sealing at docking place, form complete coating real-time wear detection device, start sand flushing gun to carry out erosion experiment, can real-time observe coating morphology change, detect the influence of erosion speed, angle and sand particle size and other parameters on coating, the technology is based on optical principle, laser is incident from coating back, changes received reflected light signal by reflection, scattering and diffraction and other optical phenomena caused by coating damage, and then analyzes optical parameter in image, obtains coating surface morphology change and damage law, the setting of single-side coating acrylic plate effectively isolates sand flushing airflow and optical detection part.

Description

Technical Field

[0001] This invention belongs to the field of coating wear testing technology, and particularly relates to a coating wear testing machine. Background Technology

[0002] As an important renewable energy source, wind energy is receiving increasing attention from countries around the world. my country's onshore wind turbines are mainly distributed in Xinjiang, Gansu and other regions. However, these regions are often affected by wind and sand. Wind and sand can cause wear on wind turbine blades, significantly reducing their aerodynamic performance, leading to reduced power generation, and may even damage the blades. Wind and sand wear is one of the main sources of wind turbine blade erosion, which affects the aerodynamic performance, structural mechanical properties and lifespan of the blades, resulting in reduced efficiency, reliability and availability of wind turbine units, increased on-site operation and maintenance workload, and increased operation and maintenance costs.

[0003] However, using appropriate materials as protective coatings for wind turbine blades can greatly reduce the impact of such wear. The erosion and wear of wind and sand on the blades first acts on the protective coating on its surface, then causes the surface coating material to peel off and its performance to degrade, and finally causes a decrease in aerodynamics, thus affecting power generation efficiency. It can be seen that the production of wind turbine blades and their overall performance largely depend on these surface coatings used for protection.

[0004] The importance of studying the damage patterns of wind turbine blade protective coatings under wind and sand flow for addressing wind turbine blade wear issues is self-evident. However, because erosion wear experiments require continuous use of jet devices to erode the target coating, the sand flow interferes with the imaging of coating surface wear. Therefore, SEM imaging can only be used after the erosion wear experiment to understand the wear characteristics such as cutting and indentation caused by sand collisions. Since current equipment does not have the ability to observe the dynamic damage of the coating in real time during the erosion wear process, it poses a challenge to in-depth research on the impact of wind and sand flow on coating wear.

[0005] Based on this, the present invention designs a coating wear testing machine to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to address the major difficulty currently faced in research, namely, the inability to observe the dynamic damage process of the coating surface in real time during sand erosion experiments due to sand flow interference, which limits the in-depth exploration of the wear mechanism by only being able to analyze wear characteristics through SEM after the experiment. Therefore, this invention proposes a coating wear testing machine.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A coating wear testing machine includes a base, on which a jet assembly and an optical detection assembly are respectively connected to the two sides of the top of the base. The jet assembly includes a sand collection box connected to one side of the top of the base. An erosion box is fastened to the top of the sand collection box. Multiple first locking buckles are provided between the erosion box and the sand collection box. Pressure relief ports are opened on both sides of the erosion box, and filter screens are fastened in both pressure relief ports. The front end face of the erosion box is provided with an erosion port, and the inner wall of the erosion port is provided with a movable groove, and a jet component is sleeved in the movable groove.

[0008] As a further description of the above technical solution: A clamping assembly is provided between the erosion box and the optical detection component, and a turbulence-disrupting component is engaged with the clamping assembly inside the erosion box.

[0009] As a further description of the above technical solution: The jetting component includes an annular disc fitted into a movable groove. A sand-flushing gun is embedded in the inner side of the annular disc. A rubber diaphragm is provided between the sand-flushing gun and the inner annular surface of the annular disc. A gun head is installed at the end of the sand-flushing gun. The other end of the sand-flushing gun is connected to a bridge pipe. A robotic arm is installed on the top of the base corresponding to the bridge pipe. A pipe rack is provided between the robotic arm and the bridge pipe. The other end of the bridge pipe is connected to a sand-flushing pipe. An air compressor is provided on the side of the base. The other end of the sand-flushing pipe is connected to the output port of the air compressor.

[0010] As a further description of the above technical solution: The clamping assembly includes a sleeve that snaps onto the erosion box, a sealing sleeve that is fitted onto the sleeve, an acrylic plate that is placed between the sealing sleeve and the sleeve, and a coating that is provided on the side of the acrylic plate facing the inside of the erosion box. The inner top of the sealing sleeve is connected with multiple bolts, and the end face of the sleeve is provided with multiple insertion holes. After passing through the multiple insertion holes, the multiple bolts are threadedly connected to multiple nuts.

[0011] As a further description of the above technical solution: The turbulence-causing component includes a panel that is snapped into the interior of the erosion chamber. A first annular sleeve is snapped into the end face of the panel. A through hole is formed on the front end face of the panel along the tangent direction of the first annular sleeve. A radial tube is sleeved in the through hole. The other end of the radial tube is connected to a manifold. The end of the manifold is installed on the side end face of the erosion chamber and is connected to the pressure relief port.

[0012] As a further description of the above technical solution: The first annular sleeve is rotatably connected to the inside of the second annular sleeve, and multiple fins arranged in a ring array are connected to the outer ring surface of the second annular sleeve. A baffle is fixedly connected to the inside of the second annular sleeve. A coil is wound around the outer ring surface of the second annular sleeve, and a first permanent magnet plate and a second permanent magnet plate are respectively connected to the inner ring surface of the first annular sleeve. The magnetic poles of the opposite sides of the first permanent magnet plate and the second permanent magnet plate are opposite.

[0013] As a further description of the above technical solution: The aerodynamic component includes an aerodynamic ring fixedly connected to the second annular sleeve. Multiple blade shafts arranged in a ring array are rotatably connected to the aerodynamic ring. Aerodynamic blades are connected to the end of each blade shaft. A bevel gear is fitted onto the other end of each blade shaft. A bevel gear ring is rotatably connected to the outer ring surface of the second annular sleeve. The bevel gear ring meshes with multiple bevel gears simultaneously.

[0014] As a further description of the above technical solution: A first adapter is connected to the bevel ring, and a first adapter is rotatably connected to the inner side of the first adapter. A second adapter is connected to the inner ring surface of the second annular sleeve, and a second adapter is rotatably connected to the inner side of the second adapter. A hydraulic cylinder is installed between the second adapter and the first adapter.

[0015] As a further description of the above technical solution: The optical inspection assembly includes an optical inspection box connected to the top of the base on the other side. The bottom of the optical inspection box is equipped with multiple telescopic support platforms. The side end face of the optical inspection box is hinged with a box cover. Multiple second latches are provided between the box cover and the optical inspection box. An electromagnet is installed on the side of the box cover facing the inside of the optical inspection box. A permanent magnet is embedded on the other side of the acrylic plate corresponding to the electromagnet. A laser and a CCD camera are installed inside the optical inspection box.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, clay is used to reinforce the seal at the joint, forming a complete real-time coating wear detection device. The sand-blasting gun is started to conduct an erosion experiment, and the changes in coating morphology can be observed in real time. The effects of parameters such as erosion speed, angle and sand particle size on the coating can be detected. This technology is based on optical principles. The laser is incident from the back of the coating. Through the optical phenomena such as reflection, scattering and diffraction caused by coating damage, the received reflected light signal is changed. Then, the optical parameters in the image are analyzed to obtain the changes in coating surface morphology and the damage law. The use of a single-sided coated acrylic plate effectively isolates the sand-blasting airflow from the optical detection part, realizing efficient and convenient coating erosion wear measurement.

[0017] 2. In this invention, the tilt angle of multiple turbulence blades is adjusted synchronously to enhance the disturbance to the direction of wind and sand flow, and to more realistically simulate the erosion environment of the coating on the surface of wind turbine blades. This setting can simulate the position, speed and angle of sand particles impacting the coating, as well as the service conditions of sand particles rebounding and impacting the coating or other blade surfaces multiple times, providing a reliable experimental basis for studying the service life of wind turbine blade coatings and material selection.

[0018] 3. In this invention, the repulsive force of an electromagnet on a permanent magnet block in an acrylic sheet is used to deform the edge of the coating towards the optical detection box, simulating the response behavior of the coating when a wind turbine blade deforms under wind force. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a coating wear testing machine proposed in this invention; Figure 2 This is a schematic diagram of the disassembled jet assembly in a coating wear testing machine proposed in this invention; Figure 3 This is a schematic diagram of the jet assembly in a coating wear testing machine proposed in this invention, viewed from another perspective after disassembly. Figure 4 This is a three-dimensional structural diagram of the turbulence component in a coating wear testing machine proposed in this invention, viewed from below. Figure 5 This is a schematic diagram of the structure of the optical detection component in a coating wear testing machine proposed in this invention, after being disassembled. Figure 6 This is a schematic diagram of the structure of the clamping component in the coating wear testing machine proposed in this invention, after being disassembled, from another perspective. Figure 7 This is a schematic diagram of the disassembled turbulence component in a coating wear testing machine proposed in this invention; Figure 8 This is a schematic diagram of the structure of the turbulence component in the coating wear tester proposed in this invention, after being disassembled, from another perspective. Figure 9 This invention proposes a coating wear testing machine. Figure 8 Enlarged structural diagram at point A in the middle.

[0020] Legend: 1. Base; 2. Jet assembly; 201. Sand collection box; 202. Erosion box; 203. First locking buckle; 204. Filter screen; 205. Erosion port; 206. Jet component; 2061. Annular disc; 2062. Rubber diaphragm; 2063. Sand flushing gun; 2064. Gun head; 2065. Bridge pipe; 2066. Pipe rack; 2067. Robotic arm; 207. Sand flushing pipe; 208. Air compressor; 209. Movable groove; 3. Clamping assembly; 301. Hoop; 302. Edge sealing sleeve; 303. Acrylic plate; 304. Coating; 305. Permanent magnet; 306. Insertion hole; 307. Bolt; 4. Baffle assembly; 401. Panel; 402. First ring 403. Second annular sleeve; 404. Fin; 405. Radial tube; 406. Through hole; 407. Baffle; 4071. Baffle ring; 4072. Baffle blade; 4073. Blade shaft; 4074. Bevel gear; 4075. Bevel gear ring; 4076. First adapter frame; 4077. Hydraulic cylinder; 4078. Second adapter; 408. Coil; 409. First permanent magnet plate; 4010. Second permanent magnet plate; 4011. Current collector; 5. Optical inspection assembly; 501. Optical inspection box; 502. Box cover; 503. Second latch; 504. Electromagnet; 505. Laser; 506. CCD camera; 507. Telescopic support platform. Detailed Implementation

[0021] 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 embodiments of the present invention, and not all embodiments. Based on the 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.

[0022] Please see the appendix Figure 1 - Appendix Figure 9 The present invention provides a technical solution: a coating wear testing machine, including a base 1, with a jet assembly 2 and an optical detection assembly 5 respectively connected to the two sides of the top of the base 1. The jet assembly 2 includes a sand collection box 201 connected to one side of the top of the base 1. An erosion box 202 is fastened to the top of the sand collection box 201. A plurality of first locking buckles 203 are provided between the erosion box 202 and the sand collection box 201. Pressure relief ports are opened on both sides of the erosion box 202, and a filter screen 204 is fastened in each of the two pressure relief ports. The front end face of the erosion box 202 is provided with an erosion port 205, and the inner wall of the erosion port 205 is provided with a movable groove 209, and a jet component 206 is sleeved in the movable groove 209.

[0023] Specifically, a clamping component 3 is provided between the erosion box 202 and the optical detection component 5. A turbulence component 4 is snapped into the erosion box 202 corresponding to the clamping component 3. The jet component 206 includes an annular disk 2061 sleeved in the movable groove 209. A sand-blasting gun 2063 is embedded in the inner side of the annular disk 2061. A rubber membrane 2062 is provided between the sand-blasting gun 2063 and the inner annular surface of the annular disk 2061. A gun head 2064 is installed at the end of the sand-blasting gun 2063. The other end of the sand-blasting gun 2063 is connected to a bridge pipe 2065. A robotic arm 2067 is installed on the top of the base 1 corresponding to the bridge pipe 2065. A pipe rack 2066 is provided between the robotic arm 2067 and the bridge pipe 2065. The other end of the bridge pipe 2065 is connected to a sand-blasting pipe 207. An air compressor 208 is provided on the side of the base 1. The other end of the sand-blasting pipe 207 is connected to the output port of the air compressor 208.

[0024] The specific implementation method is as follows: The air compressor 208 is controlled to operate. The air compressor 208 discharges the sucked-in quicksand through the flushing pipe 207. Then, the quicksand is introduced into the flushing gun 2063 through the flushing pipe 207 and the bridge pipe 2065. Finally, the quicksand is sprayed out by the flushing gun 2063 through the nozzle 2064 and flows towards the coating 304 to erode the coating 304. During the erosion process, the air pressure can be adjusted by controlling the pressure regulating valve on the air compressor 208 to regulate the erosion speed. The angle can also be adjusted by the robotic arm 2067 to regulate the erosion angle. The robotic arm 2067 is controlled... During the process of adjusting the spray angle of the gun head 2064, the joint of the robotic arm 2067 applies driving force to the bridge pipe 2065 through the pipe frame 2066. The bridge pipe 2065 drives the annular disk 2061 to move arbitrarily within the movable groove 209 through the sand-blasting gun 2063. Since the annular disk 2061 is rigidly connected to the movable groove 209, when the tilt of the gun head 2064 needs to be changed, the rubber diaphragm 2062 will undergo elastic deformation, thereby ensuring the sealing of the erosion port 205 and preventing light from entering the erosion box 202 through the erosion port 205.

[0025] Specifically, the clamping assembly 3 includes a sleeve 301 that is snapped onto the erosion box 202, a sealing sleeve 302 that is fitted onto the sleeve 301, an acrylic plate 303 that is placed between the inside of the sealing sleeve 302 and the sleeve 301, and a coating 304 that is provided on the side of the acrylic plate 303 facing the inside of the erosion box 202. The inner top of the sealing sleeve 302 is connected with multiple bolts 307, and the end face of the sleeve 301 is provided with multiple insertion holes 306. The multiple bolts 307 pass through the multiple insertion holes 306 and are threadedly connected to multiple nuts.

[0026] The specific implementation method is as follows: control the telescopic support platform 507 to push the optical inspection box 501 upward, then remove multiple nuts in sequence, then remove the edge sealing sleeve 302, insert the acrylic plate 303 into the edge sealing sleeve 302, then re-fasten the edge sealing sleeve 302 to complete the combination with the sleeve 301, finally install multiple nuts onto multiple bolts 307 respectively and tighten them to fix them, then control the telescopic support platform 507 to drive the optical inspection box 501 downward until the optical inspection box 501 is tightly connected with the acrylic plate 303. At this time, the side of the acrylic plate 303 coated with the coating 304 faces the inside of the erosion box 202, and the side of the acrylic plate 303 embedded with the permanent magnet block 305 faces the inside of the optical inspection box 501.

[0027] Specifically, the turbulence component 4 includes a panel 401 that is snapped into the interior of the erosion box 202. A first annular sleeve 402 is snapped into the end face of the panel 401. A through hole 406 is opened on the front end face of the panel 401 along the tangent direction of the first annular sleeve 402. A radial tube 405 is sleeved inside the through hole 406. The other end of the radial tube 405 is connected to a collector tube 4011. The end of the collector tube 4011 is installed on the side end face of the erosion box 202 and is connected to the pressure relief port. A second annular sleeve 403 is rotatably connected inside the first annular sleeve 402. A plurality of fins 404 arranged in a ring array are connected to the outer ring surface of the second annular sleeve 403. A turbulence component 407 is fixedly connected inside the second annular sleeve 403. A coil 408 is wound and connected to the outer ring surface of the second annular sleeve 403. A first permanent magnet plate 409 and a second permanent magnet plate 4010 are respectively connected to the inner ring surface of the first annular sleeve 402. The magnetic poles of the opposite faces of the first permanent magnet plate 409 and the second permanent magnet plate 4010 are opposite. The turbulence-inducing component 407 includes a turbulence-inducing ring 4071 fixedly connected to the second annular sleeve 403. A plurality of blade shafts 4073 arranged in a ring array are rotatably connected to the turbulence-inducing ring 4071. Turbulence-inducing blades 4072 are connected to the ends of the blade shafts 4073. The other end is fitted with a bevel gear 4074. A bevel gear ring 4075 is rotatably connected to the outer ring surface of the second annular sleeve 403. The bevel gear ring 4075 meshes with multiple bevel gears 4074 simultaneously. A first adapter frame 4076 is connected to the bevel gear ring 4075. A first adapter joint is rotatably connected to the inner side of the first adapter frame 4076. A second adapter frame is connected to the inner ring surface of the second annular sleeve 403. A second adapter joint 4078 is rotatably connected to the inner side of the second adapter frame. A hydraulic cylinder 4077 is installed between the second adapter joint 4078 and the first adapter joint.

[0028] The specific implementation method is as follows: After the sand and dust flow enters the erosion box 202, the airflow flows into the collection pipe 4011 through the filter screen 204 installed in the pressure relief port, while the sand settles into the sand collection box 201. The airflow in the collection pipe 4011 flows into the first annular sleeve 402 through the radial pipe 405 and directly acts on the multiple fins 404 arranged in a ring array. This will drive the second annular sleeve 403 to rotate within the first annular sleeve 402, and the rotation speed is proportional to the flow velocity of the sand and dust flow. During the rotation of the second annular sleeve 403, multiple blade shafts 4073 simultaneously drive multiple turbulence blades 4072 to rotate. Based on the jet assembly 2, the multiple turbulence blades 4072 in the rotating state further change the movement trajectory of the sand particles. During this process, the hydraulic cylinder 4077 can also be controlled to perform corresponding extension and retraction movements. The two ends of the hydraulic cylinder 4077 are connected to the first adapter and the second... The adapter 4078 rotates within the first adapter frame 4076 and the second adapter frame, thereby driving the bevel gear ring 4075 to rotate. Utilizing the transmission relationship between the bevel gear ring 4075 and multiple bevel gears 4074, the tilt angles of multiple turbulence-causing blades 4072 can be changed synchronously, further disrupting the flow direction of the sand and dust. This can simulate the erosion environment of the wind turbine blade surface coating 304 to the greatest extent possible, simulating the position, velocity, and angle of solid sand impacting the coating 304 surface, as well as the impact of particles rebounding from the coating 304 surface and impacting other positions of the coating 304 or other blade surfaces of the coating 304 in different motion states, resulting in a service environment of multiple erosion and wear on the coating 304. The test results can provide reliable experimental basis for studying the service life of the wind turbine blade coating 304 and for selecting the coating 304 material. During the rotation of the second annular sleeve 403, the coil 408 will also rotate between the first permanent magnet plate 409 and the second permanent magnet plate 4010, thereby generating current. The generated current is supplied to the electromagnet 504, and the magnetic strength of the electromagnet 504 is proportional to the flow velocity of the wind and sand. By using the repulsive force of the electromagnet 504 on the permanent magnet block 305, the edge of the acrylic plate 303 coating 304 is deformed towards the optical detection box 501 relative to the erosion direction, thereby simulating the change of the coating 304 during the deformation stage when the wind turbine blade is subjected to wind.

[0029] Specifically, the optical inspection assembly 5 includes an optical inspection box 501 connected to the other side of the top of the base 1. Multiple telescopic support platforms 507 are installed at the bottom of the optical inspection box 501. A box cover 502 is hinged to the side end of the optical inspection box 501. Multiple second latches 503 are provided between the box cover 502 and the optical inspection box 501. An electromagnet 504 is installed on the side of the box cover 502 facing the inside of the optical inspection box 501. A useful word is embedded on the other side of the acrylic plate 303 corresponding to the electromagnet 504. A laser 505 and a CCD camera 506 are installed inside the optical inspection box 501.

[0030] The specific implementation method is as follows: The optical inspection box 501 is a darkroom box wrapped with a black light-shielding film. Its function is to protect the laser 505 with beam expansion function and the CCD camera 506, and to ensure the stability of ambient light. The optical inspection box 501 is hinged to the box cover 502 to ensure the airtightness of the box. The optical inspection box 501, together with the laser 505, the CCD camera 506 and the telescopic support platform 507, completes the optical inspection. The laser 505 and the CCD camera 506 are placed in the optical inspection box 501 and fixed. Then, they are connected to the acrylic plate 303 with coating 304 on the already fixed jet assembly 2. Clay is applied to the connection to further ensure the airtightness, forming a complete device for detecting the real-time wear of coating 304. Then, the sandblasting gun 2063 is activated. This technology allows for real-time observation of the morphological changes of the coating 304 during erosion and wear experiments. It can detect the effects of multiple parameters, including erosion rate, erosion angle, and particle size, on the coating 304. Utilizing optical methods, a laser is incident from the back of the coating 304. Through multiple optical phenomena such as reflection, scattering, and diffraction caused by the damage to the coating 304, the received reflected light changes. By analyzing the optical parameters in the captured images, the changes in the surface morphology of the coating 304 and the damage patterns can be obtained. An acrylic plate 303 with one side coated with 304 and the other without coating 304 is cleverly connected to the two parts, ensuring that the sand and dust ejected by the sand-blasting gun 2063 do not interfere with the optical detection component 5. This allows for efficient and convenient measurement of the changes in the coating 304 during erosion and wear experiments.

[0031] Working principle and usage: The telescopic support platform 507 is controlled to rise upward, causing the optical inspection box 501 to rise accordingly. Then, multiple nuts are removed in sequence, the edge sealing sleeve 302 is taken off, the acrylic plate 303 is installed inside the edge sealing sleeve, and the edge sealing sleeve 302 is re-fastened into the sleeve 301 to complete the assembly. After that, multiple nuts are installed onto the corresponding bolts 307 and tightened to fix them. Then, the telescopic support platform 507 is controlled to drive the optical inspection box 501 to descend until the optical inspection box and the acrylic plate 303 are tightly attached. At this time, the side of the acrylic plate 303 coated with the coating 304 faces the inside of the erosion box 202, while the side with the embedded permanent magnet block 305 faces the inside of the optical inspection box 501. The air compressor 208 is started, and the flowing sand sucked in by the air compressor 208 is output through the sand flushing pipe 207, and then transported to the sand flushing gun 2063 through the bridge pipe 2065. Finally, it is sprayed out by the gun head 2064, impacting the surface of the coating 304 to realize the sand erosion process. During the erosion process, the erosion speed can be adjusted by adjusting the air pressure of the pressure regulating valve on the air compressor 208. At the same time, the angle of the gun head is adjusted by the robotic arm 2067 to change the erosion angle. The joint of the robotic arm 2067 transmits the driving force to the bridge pipe 2065 through the pipe frame 2066, which drives the sand flushing gun 2063 and the annular disk 2061 to move in the movable groove 209. The annular disk 2061 and the movable groove 209 are rigidly connected. When the tilt angle of the gun head is adjusted, the rubber diaphragm 2062 undergoes elastic deformation to ensure that the erosion port 205 remains sealed and prevents external light from entering the erosion box. The optical inspection box 501 is covered with a black light-shielding film, creating a darkroom environment to protect the laser 505 with beam expansion function and the CCD camera 506, ensuring stable light during optical inspection. The box is fitted with a lid 502 via hinges to ensure internal airtightness. The optical inspection box 501, laser 505, CCD camera 506, and telescopic support platform 507 together constitute the optical inspection system. The laser and CCD camera are fixed inside the optical inspection box 501 and connected to the jet assembly 2, which has a coated acrylic plate 303 already installed. The connection point is reinforced with clay for sealing, forming... A complete real-time coating wear detection device can be used to conduct erosion experiments by starting a sand-blasting gun. It can observe the changes in coating morphology in real time and detect the influence of parameters such as erosion speed, angle and sand particle size on the coating. This technology is based on optical principles. The laser is incident from the back of the coating. Through optical phenomena such as reflection, scattering and diffraction caused by coating damage, the received reflected light signal is changed. Then, the optical parameters in the image are analyzed to obtain the changes in coating surface morphology and damage patterns. The single-sided coated acrylic plate effectively isolates the sand-blasting airflow from the optical detection part, realizing efficient and convenient coating erosion wear measurement. After the sand and dust flow enters the erosion box, the airflow passes through the filter screen 204 at the pressure relief port and enters the collection pipe 4011. The sand particles settle in the sand collection box 201. The airflow in the collection pipe is introduced into the first annular sleeve 402 through the radial pipe 405 and acts on the multiple fins 404 arranged in a ring, pushing the second annular sleeve 403 to rotate inside the first annular sleeve. Its rotation speed is proportional to the speed of the sand and dust flow. When the second annular sleeve rotates, it drives the turbulence-disrupting blades 4072 to rotate synchronously through multiple blade shafts 4073, further disrupting the movement trajectory of the sand particles. In addition, by controlling the extension and retraction of the hydraulic cylinder 4077, the two ends of the hydraulic cylinder are connected to the first adapter and The second adapter 4078 is rotatably connected to the first adapter 4076 and the second adapter, respectively, and drives the bevel gear ring 4075 to rotate. With the help of the transmission between the bevel gear ring 4075 and multiple bevel gears 4074, the tilt angle of multiple turbulence blades 4072 is adjusted synchronously, which enhances the disturbance to the direction of wind and sand flow and more realistically simulates the erosion environment of the coating on the surface of wind turbine blades. This setting can simulate the position, speed, and angle of sand particles impacting the coating, as well as the service conditions of sand particles rebounding and impacting the coating or other blade surfaces multiple times, providing a reliable experimental basis for studying the service life of wind turbine blade coatings and material selection. When the second annular sleeve 403 rotates, it drives the coil 408 to rotate between the first permanent magnet plate 409 and the second permanent magnet plate 4010, generating current. This current supplies the electromagnet 504, whose magnetic strength is proportional to the wind and sand flow speed. By using the repulsive force of the electromagnet on the permanent magnet block 305 in the acrylic plate, the edge of the coating is deformed towards the optical detection box, simulating the response behavior of the coating when the wind turbine blade is deformed under the action of wind.

[0032] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A coating wear testing machine, comprising a base (1), characterized in that, The top of the base (1) is connected to a jet assembly (2) and an optical detection assembly (5) on both sides respectively. The jet assembly (2) includes a sand collection box (201) connected to one side of the top of the base (1). The top of the sand collection box (201) is fastened to an erosion box (202). Multiple first interlocking buckles (203) are provided between the erosion box (202) and the sand collection box (201). Both sides of the erosion box (202) are provided with pressure relief ports, and each of the two pressure relief ports is fitted with a filter screen (204). The front end face of the erosion box (202) is provided with an erosion port (205), and the inner wall of the erosion port (205) is provided with a movable groove (209), and a jet component (206) is sleeved in the movable groove (209). A clamping component (3) is provided between the erosion box (202) and the optical detection component (5), and a turbulence component (4) is snapped into the erosion box (202) corresponding to the clamping component (3). An acrylic plate (303) is provided in the clamping assembly (3), and a coating (304) is provided on the side of the acrylic plate (303) facing the inside of the erosion box (202). The turbulence assembly (4) includes a panel (401) snapped into the interior of the erosion box (202), a first annular sleeve (402) snapped into the end face of the panel (401), a second annular sleeve (403) rotatably connected inside the first annular sleeve (402), a plurality of fins (404) arranged in an annular array connected to the outer annular surface of the second annular sleeve (403), and a turbulence element (407) fixedly connected inside the second annular sleeve (403). A coil (408) is wound and connected on the outer ring surface of the second annular sleeve (403), and a first permanent magnet plate (409) and a second permanent magnet plate (4010) are respectively connected on the inner ring surface of the first annular sleeve (402). The magnetic poles of the opposite sides of the first permanent magnet plate (409) and the second permanent magnet plate (4010) are opposite. The turbulence-disrupting component (407) includes a turbulence-disrupting ring (4071) fixedly connected within a second annular sleeve (403). A plurality of blade shafts (4073) arranged in a ring array are rotatably connected to the turbulence-disrupting ring (4071). Turbulence-disrupting blades (4072) are connected to the ends of the blade shafts (4073). A bevel gear (4074) is fitted onto the other end of the blade shafts (4073). A bevel gear ring (4075) is rotatably connected to the outer ring surface of the second annular sleeve (403). The bevel gear ring (4075) meshes with the plurality of bevel gears (4074) simultaneously.

2. The coating wear testing machine according to claim 1, characterized in that, The clamping assembly (3) includes a sleeve (301) snapped onto the erosion box (202), a sealing sleeve (302) is sleeved on the sleeve (301), and an acrylic plate (303) is disposed between the sealing sleeve (302) and the sleeve (301); The front end face of the panel (401) is provided with a through hole (406) along the tangent direction of the first annular sleeve (402). A radial tube (405) is sleeved inside the through hole (406). The other end of the radial tube (405) is connected to a manifold (4011). The end of the manifold (4011) is installed on the side end face of the erosion box (202) and is connected to the pressure relief port. A first adapter (4076) is connected to the bevel ring (4075). A first adapter is rotatably connected to the inner side of the first adapter (4076). A second adapter is connected to the inner ring surface of the second annular sleeve (403). A second adapter (4078) is rotatably connected to the inner side of the second adapter. A hydraulic cylinder (4077) is installed between the second adapter (4078) and the first adapter.

3. The coating wear testing machine according to claim 2, characterized in that, The jetting component (206) includes an annular disc (2061) fitted into a movable groove (209). A sand-blasting gun (2063) is embedded on the inner side of the annular disc (2061). A rubber membrane (2062) is provided between the sand-blasting gun (2063) and the inner annular surface of the annular disc (2061). A gun head (2064) is installed at the end of the sand-blasting gun (2063). The other end of the sand-blasting gun (2063) is connected to a bridge pipe (2064). 65), a robotic arm (2067) is installed on the top of the base (1) corresponding to the bridge pipe (2065), a pipe rack (2066) is provided between the robotic arm (2067) and the bridge pipe (2065), the other end of the bridge pipe (2065) is connected to a sand flushing pipe (207), an air compressor (208) is provided on the side of the base (1), and the other end of the sand flushing pipe (207) is connected to the output port of the air compressor (208).

4. A coating wear testing machine according to claim 3, characterized in that, The inner top of the sealing sleeve (302) is connected with multiple bolts (307), and the end face of the sleeve (301) is provided with multiple insertion holes (306). The multiple bolts (307) pass through the multiple insertion holes (306) and are threadedly connected to multiple nuts.

5. A coating wear testing machine according to claim 4, characterized in that, The optical inspection assembly (5) includes an optical inspection box (501) connected to the other side of the top of the base (1). Multiple telescopic support platforms (507) are installed at the bottom of the optical inspection box (501). A box cover (502) is hinged to the side end of the optical inspection box (501) via a hinge. Multiple second latches (503) are provided between the box cover (502) and the optical inspection box (501). An electromagnet (504) is installed on the side of the box cover (502) facing the inside of the optical inspection box (501). A permanent magnet block is embedded on the other side of the acrylic plate (303) corresponding to the electromagnet (504). A laser (505) and a CCD camera (506) are installed inside the optical inspection box (501).

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