Ring-spray disc based fan blade material erosion test device and method

Abstract

The present application belongs to the technical field of erosion wear test, in order to solve the problem that it is difficult to switch or superimpose various medium erosion conditions in the same device, a fan blade material erosion test device and method based on annular jet disc are provided, which comprises a container cabinet, a disc jet unit, a sample rotating motion unit and a bottom circulating water tank unit; the annular jet disc is provided with a medium flow channel extending in the circumferential direction; the nozzles located in the corresponding area of the liquid disc pipeline constitute a water jetting area for rain erosion; the nozzles located in the corresponding area of the sand disc pipeline constitute a sand jetting area for wind-sand or gas-solid mixed erosion; the sample rotates around its own axis under the drive of the rotating table assembly to simulate the tangential motion state of the fan blade in the actual operation process. The device can stably simulate the rain erosion, wind-sand erosion and their combined effect of the fan blade.

Description

Technical Field

[0001] This invention belongs to the technical field of erosion and wear testing, and particularly relates to a device and method for erosion testing of wind turbine blade materials based on an annular jet disk. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] During long-term service, wind turbine blades are continuously subjected to various environmental loads, including rainfall, water droplet impact, and windblown sand erosion, which can easily lead to surface erosion, coating peeling, and substrate damage. Existing erosion testing equipment is mostly designed for single operating conditions, such as simulating only rain erosion or only windblown sand erosion, making it difficult to switch or superimpose multiple media erosion conditions within a single device. Furthermore, while there are currently testing machines that include sandblasting and mud erosion tests, their integrated setup involves placing the sandblasting and mud erosion systems in separate independent chambers within the test chamber. Essentially, this also involves selectively performing sandblasting or mud erosion tests on the same equipment platform, failing to achieve the effects of multiple media erosion in a single test.

[0004] In addition, the relative motion of the samples in some existing devices is too simple and fails to effectively simulate the tangential velocity component that the wind turbine blades experience when rotating. At the same time, the recovery, filtration and circulation structure of the erosion medium is not perfect, which can easily lead to problems such as low medium utilization efficiency and insufficient test stability. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, the present invention provides a wind turbine blade material erosion test device and method based on an annular jet disk, which realizes stable simulation of rain erosion, wind and sand erosion and their combined effects, and improves the authenticity and consistency of material erosion test.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a wind turbine blade material erosion testing device based on an annular spray disc, comprising: a container cabinet, and a disc spraying unit, a sample rotation motion unit, and a bottom circulating water tank unit disposed within the container cabinet; The disc spraying unit includes an annular spraying disc and nozzles. The annular spraying disc contains a medium flow channel extending along the circumference, including physically isolated liquid disc pipes and sand disc pipes. The nozzles located in the corresponding area of ​​the liquid disc pipes constitute a water spraying zone for rain erosion. The nozzles located in the corresponding area of ​​the sand disc pipes constitute a sandblasting zone for wind and sand or gas-solid mixed erosion. The sample rotation unit is located below the disc spray unit. The sample can rotate around its own axis under the drive of the rotary table assembly to simulate the tangential motion state of the wind turbine blade during actual operation. The bottom circulating water tank unit is used to collect, settle, filter and purify the water-containing and sand-containing media generated during the erosion process.

[0007] Secondly, the present invention provides a method for testing the erosion of wind turbine blade materials based on an annular jet disk, employing the wind turbine blade material erosion testing apparatus based on an annular jet disk as described above, comprising: The wind turbine blade material sample to be tested is fixedly installed on the sample fixture, and the installation status of the sample is confirmed through the observation window. The rotary table is controlled to make the sample rotate around its own axis to simulate the tangential motion of a fan with blades under actual working conditions, and the position of the sample in the horizontal direction is adjusted. Liquid medium and sand medium are injected into the liquid disc pipe and the sand disc pipe, respectively. While the sample rotates and moves horizontally, continuous liquid erosion, sand erosion, or a combination of liquid erosion and sand erosion are carried out to simulate the combined erosion conditions of wind turbine blades under rain erosion and sandstorm environment. The water- and sand-containing media generated during the erosion process flow into the bottom circulating water tank unit through the bottom of the test chamber for collection, sedimentation, filtration and purification.

[0008] The above one or more technical solutions have the following beneficial effects: In this invention, by setting an annular spray disk inside the chamber and integrating water spraying and sand spraying into the same annular spray disk, circumferential coordinated spraying of liquid medium and solid particulate medium is achieved in the same erosion space. This allows the sample to be subjected to multi-directional and multi-medium erosion loading simultaneously or alternately during the same test, which is closer to the combined rain erosion and wind and sand action environment experienced by wind turbine blades in actual service. Through independent nozzle control, the spray area and spray medium type can be flexibly switched, improving the adaptability and repeatability of the device under different erosion conditions.

[0009] In this invention, by combining the rotation of the sample with horizontal movement, the sample obtains a tangential velocity and erosion location that are closer to the actual service state of the wind turbine blade during the erosion process, thereby improving the engineering relevance of the test results.

[0010] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0011] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0012] Figure 1 This is a schematic diagram of the overall external structure of the wind turbine blade material erosion test device in an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure of the wind turbine blade material erosion test device in an embodiment of the present invention; Figure 3 This is a schematic diagram of the arrangement of the annular injection disk and nozzles in an embodiment of the present invention; Figure 4 This is a schematic diagram of the tank body and sewage tank unit structure in an embodiment of the present invention; Figure 5 This is a schematic diagram of the sample rotation motion unit structure in an embodiment of the present invention; In the diagram, 1 is the container cabinet; 101 is the observation window; 102 is the liquid medium pipeline interface; 103 is the sand medium pipeline interface; and 104 is the motor belt port. 2. Disc spraying unit; 201. Sealed baffle; 202. Nozzle; 203. Sand discharge port; 204. Water inlet pipe interface; 205. Sand inlet pipe interface; 206. Support; 207. Liquid disc pipe; 208. Sand disc pipe; 3. Sample rotation motion unit; 301. Sample clamp; 302. Rotary table; 303. Lateral sliding table; 304. Vertical support; 4. Bottom circulating water tank unit; 401. Settling zone; 402. Filtration zone; 403. Purified water zone; 404. Sewage pipe; 405. Water tank interface; 5. Motor; 501. Self-rotating motor; 502. Horizontal motor. Detailed Implementation

[0013] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0014] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations of the present invention.

[0015] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0016] Example 1 This embodiment discloses a wind turbine blade material erosion test device based on an annular spray disc, including a container cabinet 1, a disc spraying unit 2, a sample rotation motion unit 3, a bottom circulating water tank unit 4, and a motor 5.

[0017] The container cabinet 1 forms a closed erosion test chamber. The container cabinet 1 has a box-like structure, with observation windows 101 on its side walls for real-time observation of the erosion state of the sample during the test. The container cabinet 1 is equipped with liquid medium pipeline interfaces 102 and sand medium pipeline interfaces 103 for connection to an external medium supply system. Motor belt ports 104 are located on the side walls or bottom of the container cabinet 1 to introduce external power into the chamber via a belt, achieving power transmission and isolation between wet and dry areas.

[0018] like Figure 2 and Figure 5 As shown, the disc spraying unit 2 is located inside the container cabinet 1 and above the sample rotation motion unit 3. The disc spraying unit 2 includes an annular spraying disc, a sealed baffle 201, a nozzle 202, a water inlet pipe interface 204, a sand inlet pipe interface 205, a liquid disc pipe 207, a sand disc pipe 208, a support 206, and a sand discharge port 203.

[0019] The annular jet disk has a hollow ring structure, with media flow channels extending along the circumference inside. By setting a sealed baffle 201, the internal space of the annular jet disk is divided into a liquid disk channel 207 and a sand particle disk channel 208, so that the liquid medium and the solid particle medium are physically isolated inside the disk.

[0020] Multiple nozzles 202 are evenly distributed around the circumference of the annular spray disk, with the nozzles 202 arranged radially towards the center of the disk. This directs the sprayed fluid towards the sample surface located below the central region of the disk, thereby achieving circumferential enveloping erosion loading of the sample. Specifically, the nozzles located in the region corresponding to the liquid disk pipe 207 constitute a water spray zone for rain erosion; the nozzles located in the region corresponding to the sand grain disk pipe 208 constitute a sandblasting zone for wind-blown sand or gas-solid mixed erosion.

[0021] The liquid disc pipe 207 is connected to the liquid medium pipe interface 102 on the container cabinet 1 via the water inlet interface 204; the sand disc pipe 208 is connected to the sand medium pipe interface 103 on the container cabinet 1 via the sand inlet interface 205. A sand discharge port 203 is provided at the corresponding position in the sandblasting area to discharge or recycle the deposited abrasive or residual sand particles generated during the test.

[0022] In some embodiments, each nozzle 202 may be equipped with a nozzle control bolt assembly for controlling the opening or closing of a single nozzle or a portion of the nozzles, thereby selectively activating the water spray zone, sand spray zone, or achieving a combined effect of rain erosion and wind and sand erosion according to test requirements.

[0023] The disc spraying unit 2 is fixedly installed inside the container cabinet 1 by the bracket 206, so that it maintains a stable position during the test and forms a set spatial relationship with the sample rotation unit 3 below.

[0024] like Figure 3 As shown, the sample rotation unit 3 is located directly below the disc spray unit 2, and is used to carry the sample and simulate the relative motion state of the wind turbine blades under actual working conditions. The sample rotation unit 3 includes a sample clamp 301, a rotating table 302, a transverse sliding table 303, and a vertical support 304.

[0025] The sample holder 301 is used to hold the sample to be tested, so that the sample maintains a stable posture during the erosion process. The rotary table 302 is used to drive the sample to rotate around its own axis, thereby providing the sample with a tangential velocity component during the erosion process to simulate the relative motion effect of the wind turbine blade material due to rotation under actual service conditions.

[0026] The transverse sliding table 303 is used to drive the rotary table 302 and the sample holder 301 to move horizontally, thereby adjusting the spatial orientation and erosion area of ​​the sample relative to the annular spray disk, and realizing erosion tests under different positions and different incident conditions. The vertical support 304 is used to install and support the rotary table 302 and the transverse sliding table 303 to ensure the stability of the overall structure.

[0027] like Figure 4 As shown, the bottom circulating water tank unit includes a settling zone 401, a filtration zone 402, a purified water zone 403, a sewage pipe 404, and a water tank interface 405 arranged sequentially along the medium flow direction. The settling zone 401, the filtration zone 402, and the purified water zone 403 are structurally interconnected and form a zoned treatment structure.

[0028] During the erosion test, the sprayed medium acts on the sample surface and flows into the settling zone 401 along the bottom of the test chamber, causing larger abrasive particles and debris to settle under gravity. The settled medium then enters the filtration zone 402, where residual particulate impurities are removed through the filtration structure. The filtered liquid enters the clean water zone 403 and is connected to the inlet pipe interface 204 via the water tank interface 405, enabling the recycling of the liquid medium. The drain pipe 404 is used to periodically discharge the abrasive and impurities accumulated in the settling zone 401 and the filtration zone 402 to maintain the stability of the system operation.

[0029] Specifically, the settling zone 401 is an expanded cavity located at the front end of the circulating water tank, used to reduce the flow rate of water- and sand-containing media, allowing larger sand particles and debris to settle to the bottom of the settling zone under gravity. A drain pipe 404 is installed at the bottom of the settling zone 401 for periodically discharging the deposited abrasive and impurities. The settling zone 401 is connected to the filtration zone 402 by a coarse filter screen to remove larger particles.

[0030] The filtration zone 402 is located downstream of the settling zone 401 and contains at least one layer of filtration structure, which can be a filter screen, filter cartridge, or detachable filter frame. This filtration structure is used to further filter the settled medium to remove suspended fine particles. The filtration structure can be replaced or cleaned as needed for testing. The filtration zone 402 is also equipped with a drain pipe 404.

[0031] The water purification zone 403 is located downstream of the filtration zone 402 and is an open clear liquid chamber. Its interior is used to store the liquid medium after sedimentation and filtration. The water purification zone 403 is connected to the water inlet pipe interface 204 of the disc spray unit 2 through the water tank interface 405, so that the purified liquid medium can flow back to the spray system and realize the recycling of the liquid medium.

[0032] By dividing the sedimentation zone, filtration zone, and purification zone into sections, the sand-containing media generated during the erosion process are treated step by step, which effectively improves the stability of the media circulation process and reduces the risk of clogging and wear of the jetting system.

[0033] like Figure 1 As shown, in this embodiment, the power from outside the chamber to the moving parts inside the chamber is transmitted through the motor 5. The motor 5 includes a self-rotating motor 501 and a transverse motor 502. The self-rotating motor 501 is used to control the belt rotation, thereby driving the rotary table 302 to achieve sample rotation. The transverse motor 502 is used to control the belt rotation, thereby driving the transverse sliding table 303 to achieve horizontal displacement of the sample.

[0034] By placing the motor outside the container cabinet 1 and using a belt to drive it to the inside of the cabinet via the motor belt port 104, the direct exposure of the motor and transmission components to water- and sand-containing environments can be effectively avoided, thereby improving the reliability and service life of the device.

[0035] In this implementation, the device can use LabVIEW software to uniformly control the sample rotation speed, travel distance, and operating cycle, thereby automating and enabling repeatable operation of the erosion test process.

[0036] This embodiment achieves multi-directional loading under rain erosion, wind erosion, and combined erosion conditions by incorporating an annular spray disk with a sealed baffle inside the chamber and integrating water spray nozzles and sand spray nozzles into the same annular structure. This significantly improves spray uniformity and coverage. The combined motion of sample rotation and horizontal movement allows the sample to achieve a tangential velocity and erosion orientation closer to the actual service state of the wind turbine blade during erosion, enhancing the engineering relevance of the test results. By integrating the erosion test chamber and wastewater collection structure inside the chamber and arranging the filtration and purification units outside, it achieves zoned treatment and stable circulation of sand-containing media, reducing internal space requirements and facilitating maintenance. Independent nozzle control allows for flexible switching of spray areas and media types, improving the adaptability and repeatability of the device under different erosion conditions. The overall device in this embodiment has a compact structure and high functional integration. Motor movement is controlled via LabVIEW within a computer, making it suitable for long-term and repeatable testing of wind turbine blade materials under various erosion environments.

[0037] Example 2 The purpose of this embodiment is to provide a method for testing the erosion of wind turbine blade materials based on an annular jet disk. It employs the wind turbine blade material erosion testing device based on an annular jet disk from Embodiment 1, and includes the following steps: S101: Open the openable door of container cabinet 1 and fix the wind turbine blade material sample to be tested. The sample is fixedly installed on the sample holder 301, and the container cabinet 1 is closed. The installation status of the sample is confirmed through the observation window 101.

[0038] S102: Start the control computer, run the LabVEV-based control program, control the rotary table 302 to make the sample rotate around its own axis to simulate the tangential motion state of a fan with blades under actual working conditions, and adjust the position of the sample in the horizontal direction.

[0039] S103: Liquid medium is injected into the liquid disc pipe 207 through the water inlet port 204. A portion of the nozzles on the annular spray disc is used to spray the liquid medium. Sand medium is injected into the sand disc pipe 208 through the sand inlet port 205. Another portion of the nozzles on the annular spray disc is used to spray fine solid particles. S104: By using a bolt switch installed on each nozzle, the corresponding nozzle can be selectively opened or closed, causing the erosion medium to be sprayed radially toward the center of the annular spray disk.

[0040] S105: While the sample rotates and moves horizontally, continuous liquid erosion, sand erosion, or a combination of both are carried out to simulate the combined erosion conditions of wind turbine blades under rain erosion and sandstorm environments.

[0041] S106: Water- and sand-containing media generated during the erosion process flow into the settling area through the bottom of the test chamber and are initially collected inside the chamber.

[0042] S107: The medium in the wastewater tank is transported through a coarse filter to the filtration zone and clean water zone outside the tank for separation and purification. The treated liquid is then returned to the device for recycling.

[0043] S108: After the set erosion time is completed, stop the spraying medium and sample movement, open the sand discharge port 203, observe through the observation window 101, and after the medium has dispersed, open the container cabinet 1, take out the sample and conduct subsequent performance evaluation.

[0044] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A wind turbine blade material erosion testing device based on an annular jet disk, characterized in that, include: The container cabinet, and the disc spraying unit, the sample rotation motion unit and the bottom circulating water tank unit installed in the container cabinet; The disc spraying unit includes an annular spraying disc and nozzles. The annular spraying disc contains a medium flow channel extending along the circumference, including physically isolated liquid disc pipes and sand disc pipes. The nozzles located in the corresponding area of ​​the liquid disc pipes constitute a water spraying zone for rain erosion. The nozzles located in the corresponding area of ​​the sand disc pipes constitute a sandblasting zone for wind and sand or gas-solid mixed erosion. The sample rotation unit is located below the disc spray unit. The sample can rotate around its own axis under the drive of the rotary table assembly to simulate the tangential motion state of the wind turbine blade during actual operation. The bottom circulating water tank unit is used to collect, settle, filter, and purify the water- and sand-containing media generated during the erosion process.

2. The wind turbine blade material erosion testing device based on an annular jet disk as described in claim 1, characterized in that, The side wall of the container cabinet is provided with an observation window, a liquid medium pipeline interface, and a sand medium pipeline interface; the liquid disc pipeline is connected to the liquid medium pipeline interface; the sand disc pipeline is connected to the sand medium pipeline interface.

3. The wind turbine blade material erosion testing device based on an annular jet disk as described in claim 1, characterized in that, The sample rotation motion unit includes a sample clamp, a rotary table, a transverse sliding table, and a vertical support; the sample clamp is used to hold the sample to be tested, and the rotary table is used to drive the sample to rotate around its own axis to simulate the relative motion effect caused by rotation of wind turbine blade material under actual service conditions.

4. The wind turbine blade material erosion testing device based on an annular jet disk as described in claim 3, characterized in that, The transverse sliding table is used to drive the rotary table and sample holder to move in the horizontal direction, thereby adjusting the spatial orientation and eroded area of ​​the sample relative to the annular spray disk, and realizing erosion tests under different positions and different incident conditions.

5. The wind turbine blade material erosion testing device based on an annular jet disk as described in claim 1, characterized in that, The bottom circulating water tank unit includes a settling zone, a filtration zone, a clean water zone, a drain pipe, and a water tank interface; the drain pipe is used to periodically discharge abrasives and impurities accumulated in the settling zone and the filtration zone; the water tank interface connects the clean water zone to the water inlet interface of the disc spray unit to realize the recycling of the liquid medium.

6. The wind turbine blade material erosion testing device based on an annular jet disk as described in claim 1, characterized in that, The nozzle is arranged radially toward the center of the annular spray disk, so that the sprayed fluid is directed toward the sample surface located below the central region of the annular spray disk, thereby achieving circumferential enveloping erosion loading of the sample.

7. The wind turbine blade material erosion testing device based on an annular jet disk as described in claim 1, characterized in that, A sand discharge port is set at the corresponding position in the sandblasting zone to discharge or recycle the deposited abrasive or residual sand particles generated during the test.

8. The wind turbine blade material erosion testing device based on an annular jet disk as described in claim 1, characterized in that, A sealing baffle is installed inside the annular spray disk to divide the internal space of the annular spray disk into a liquid disk pipe and a sand disk pipe.

9. The wind turbine blade material erosion testing device based on an annular jet disk as described in claim 1, characterized in that, The disc spraying unit is fixedly installed inside the container cabinet by a bracket, and forms a predetermined spatial relationship with the sample rotation motion unit below.

10. A method for testing the erosion of wind turbine blade materials based on an annular jet disk, comprising the wind turbine blade material erosion testing apparatus based on an annular jet disk as described in any one of claims 1-9, characterized in that, include: The wind turbine blade material sample to be tested is fixedly installed on the sample fixture, and the installation status of the sample is confirmed through the observation window. The rotary table is controlled to make the sample rotate around its own axis to simulate the tangential motion of a fan with blades under actual working conditions, and the position of the sample in the horizontal direction is adjusted. Liquid medium and sand medium are injected into the liquid disc pipe and the sand disc pipe, respectively. While the sample rotates and moves horizontally, it is continuously subjected to liquid erosion, sand erosion, or a combination of liquid erosion and sand erosion to simulate the combined erosion conditions of wind turbine blades under rain erosion and sandstorm environment. The water- and sand-containing media generated during the erosion process flow into the bottom circulating water tank unit through the bottom of the test chamber for collection, sedimentation, filtration and purification.

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