A method for installing a grating sensor for testing a wind turbine blade

Abstract

This invention discloses a method for installing a grating sensor for wind turbine blade testing, comprising: positioning, marking, surface grinding, cleaning of the bonding surface, ablation treatment of the bonding surface, ablation cleaning of the bonding surface, ablation treatment of the sensor, ablation cleaning of the sensor, surface treatment of the bonding surface, bonding of the sensor, cleaning after bonding, installation of the outer surface protective layer, and fixing and protecting the connecting optical cable. Compared with existing processes, the sensor installed using the method of this invention has a longer service life, shorter installation time, and lower auxiliary material consumption, thereby improving the efficiency of wind turbine blade testing preparation and reducing labor and material costs.

Description

Technical Field

[0001] This invention relates to the field of wind turbine blade testing technology, and specifically to a method for installing a grating sensor for wind turbine blade testing. Background Technology

[0002] Currently, wind power generation is widely used as a new energy source. As one of the important components of a wind turbine, wind turbine blades are designed to have a service life of 20-30 years, and damage to them can lead to serious economic losses.

[0003] To prevent premature damage to wind turbine blades due to design flaws, all existing wind turbine blades undergo systematic fatigue testing before design finalization. Sensor installation is a necessary step in the preparation process for wind turbine blade fatigue testing. Current sensor installation methods are cumbersome, complex, and consume large amounts of materials. Furthermore, the lifespan of sensors installed using these methods is relatively short and cannot meet the requirements of the entire testing cycle. Summary of the Invention

[0004] The purpose of this invention is to provide a method for installing a grating sensor for testing wind turbine blades, so as to solve the technical problems pointed out in the background art.

[0005] To achieve the objectives of this invention, the technical solution provided by this invention is as follows:

[0006] A method for installing a grating sensor for testing wind turbine blades includes the following steps:

[0007] Step S1: Determine the installation location of the grating sensor according to the wind turbine blade test plan, and mark the installation location;

[0008] Step S2: Place the grating sensor at the marked installation position, draw the outline of the grating sensor on the surface of the wind turbine blade using a water-based marker, and draw marking lines outward around the outline of the grating sensor.

[0009] Step S3: Use a power drill with a grinding head to roughen the area within the marked line;

[0010] Step S4: Use a cloth or wiping paper to clean the debris in the area within the marked line;

[0011] Step S5: Use an ultraviolet laser irradiator to irradiate the area within the marked line to ablate the surface deposits and resin-rich material on the blade.

[0012] Step S6: Use a brush dipped in cleaning agent to clean the area inside the ablated marking line and wait for the area inside the marking line to dry completely.

[0013] Step S7: Use an ultraviolet laser irradiator to irradiate the bonding surface of the grating sensor to ablate the surface deposits and resin-rich material of the grating sensor.

[0014] Step S8: Use a cleaning agent and an ultrasonic vibration cleaner to clean the ablated grating sensor and wait for the grating sensor to dry completely;

[0015] Step S9: Using a dropper or brush, apply surfactant evenly to the area within the marking lines of the wind turbine blade and the bonding surface of the grating sensor to be bonded.

[0016] Step S10: After the surfactant takes effect, use a brush or dropper to evenly apply the adhesive to the bonding surface of the grating sensor to be bonded, and then bond it to the installation position marked on the blade.

[0017] Step S11: After the adhesive has completely solidified, use a cloth or wiping paper to clean the debris on the back of the grating sensor and the area within the marking lines on the blades.

[0018] Step S12: Cover the grating sensor and contour area with protective material;

[0019] Step S13: Organize the connecting optical cable and use adhesive material to fix the connecting optical cable to the outer surface of the blade.

[0020] In step S2, the spanwise spacing between the grating sensor outline and the marking line is greater than or equal to 100 mm, and the chordwise spacing is greater than or equal to 50 mm.

[0021] In step S2, the water-based marker is not black.

[0022] In step S3, the area within the marked line is polished until the surface roughness is between Ra3.2 and 6.4.

[0023] In step S4, dimethyl carbonate solution is selected as the wiping agent.

[0024] In step S5, the power of the ultraviolet laser irradiator is 20W-40W, and the scanning speed is 100-500mm / s.

[0025] In step S6, the cleaning agent is an acetone solution with an acetone mass fraction greater than 90%.

[0026] In step S8, the ultrasonic power of the ultrasonic vibration cleaner is 50W and the standard ultrasonic frequency is 40KHz.

[0027] In step S10, after the bonding and positioning are completed, a layer of polyethylene or tetrafluoroethylene film is placed on the grating sensor. Excess adhesive and air bubbles are gently squeezed out with fingers, and the film can be released after 5-10 seconds.

[0028] In step S12, the protective material is viscoelastic tape.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] After testing, the technical solution of this application shows that, compared with the existing sensor installation methods, the grating sensor installed using the technical solution of this application has a service life longer than a single test cycle. The grating sensor does not need to be repaired or replaced within a single test, which reduces experimental downtime and delays, improves testing efficiency, and significantly reduces the amount of auxiliary materials required, thus having certain economic benefits and facilitating its promotion and use in industry. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the method flow of the present invention;

[0032] Figure 2 This is a schematic diagram showing the relative positions of the outline and the marking line in this invention.

[0033] In the diagram, 1 represents the wind turbine blade, 2 represents the outline, and 3 represents the marker line. Detailed Implementation

[0034] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0035] like Figures 1-2 The image shown is an embodiment of the present invention.

[0036] Taking the installation process of the grating sensor in the test of IET10 wind turbine blade 1 as an example, the specific operation steps are as follows:

[0037] Step 1: According to the test plan, select the front and rear edge parting lines of the single section, and the central area of ​​the PS / SS main beam as the test point; set a test section every 1m from the leaf root to the spanwise 10m area, and select a total of 10 test sections and 40 test points.

[0038] Step 2: Using a red water-based marker, draw outline 2 at the test point location according to the shape of the grating sensor. After drawing outline 2, measure 100mm outward in the span direction and 50mm outward in the chord direction from outline 2 and draw marking line 3 using a red water-based marker. Marking line 3 and outline 2 should be clearly visible.

[0039] Step 3: Use a power drill with a No. 3 grinding head to grind the area within the marked line. The grinding should be uniform. During the grinding process, be careful to keep the lines clearly visible. After grinding, use a roughness tester to check the surface roughness. The surface roughness of this location should be between Ra3.2 and 6.4.

[0040] Step 4: Use a wiping paper soaked in dimethyl carbonate solution to clean and scrub the polished area, completely removing polishing dust, oil stains and other debris. After polishing, let it stand for 30 minutes to allow the dimethyl carbonate to completely evaporate.

[0041] Step 5: Use a support fixture to fix the ultraviolet laser irradiator to the surface of the wind turbine blade, adjust the positioning so that it is aligned with the area within the marked line, and irradiate the area within the marked line with a power of 30W and a speed of 300mm / s. After irradiation, remove the ultraviolet laser irradiator and the support fixture. Pay attention to personnel safety protection during the irradiation process.

[0042] Step 6: Use a brush to clean the contour area with a 90% acetone solution. After applying, let it sit for 30 minutes to allow the acetone to evaporate completely.

[0043] Step 7: Fix the ultraviolet laser irradiator to the operating table, adjust its positioning to align it with the grating sensor to be bonded, and irradiate the area within the marked line at a power of 30W and a speed of 300mm / s. During the irradiation process, pay attention to personnel safety protection.

[0044] Step 8: Place the grating sensor into the ultrasonic cleaner and fill it with 90% acetone solution. Set the ultrasonic power to 50W, the standard ultrasonic frequency to 40KHz, and the cleaning time to 20 minutes. After cleaning, remove the sensor and let it stand for 30 minutes to allow the acetone to evaporate completely.

[0045] Step 9: Use a brush to apply Permabond surfactant evenly to the bonding surface and contour area of ​​the grating sensor. After application, let it stand for 20 minutes to allow the surfactant to react completely.

[0046] Step 10: Apply Permabond 2011 adhesive evenly to the bonding surface of the grating sensor. Attach the grating sensor, after applying the adhesive, to the housing surface according to the outline, ensuring accurate positioning. After positioning, place a layer of polyethylene or PTFE film on the grating sensor and gently squeeze out excess adhesive and air bubbles with your fingers. Release after 5-10 seconds. The properly attached grating sensor should be accurately positioned, firmly bonded, with a uniform adhesive layer, free of air bubbles, and clean.

[0047] Step 11: Let stand for 24 hours until the adhesive has completely solidified. Then, use a wiping paper dipped in dimethyl carbonate to wipe the outer surface of the grating sensor and the area inside the blade marking lines to remove residual adhesive and other contaminants. After wiping, let stand for 30 minutes until the dimethyl carbonate has completely evaporated.

[0048] Step 12: Apply Zhuohuang brand 10mm viscoelastic tape to the surface of the grating sensor. The tape should cover the entire area of ​​the outer surface of the grating sensor and the marked lines. Be careful to remove air bubbles during the application process.

[0049] Step 13: Organize the connecting optical cable and use cloth tape to stick it to the surface of the blade being tested, ensuring that the bending radius of the optical cable is greater than 10cm when it gets tangled.

[0050] The verification test lasted for 69 days, with a total of 3,178,200 cycles. During the test, the grating sensors bonded according to this scheme were not damaged and met the experimental requirements.

[0051] Finally, it should be noted that the above embodiments are merely illustrative and explanatory of the present invention, and are not intended to limit the present invention to the scope of the described embodiments. Furthermore, those skilled in the art will understand that the present invention is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of the present invention, all of which fall within the scope of protection claimed by the present invention.

Claims

1. A method for installing a grating sensor for testing wind turbine blades, characterized in that, Includes the following steps: Step S1: Determine the installation location of the grating sensor according to the wind turbine blade test plan, and mark the installation location; Step S2: Place the grating sensor at the marked installation position, draw the outline of the grating sensor on the surface of the wind turbine blade using a water-based marker, and draw marking lines outward around the outline of the grating sensor. Step S3: Use a power drill with a grinding head to roughen the area within the marked line; Step S4: Use a cloth or wiping paper to clean the debris in the area within the marked line; Step S5: Use an ultraviolet laser irradiator to irradiate the area within the marked line to ablate the surface deposits and resin-rich material on the blade. Step S6: Use a brush dipped in cleaning agent to clean the area inside the ablated marking line and wait for the area inside the marking line to dry completely. Step S7: Use an ultraviolet laser irradiator to irradiate the bonding surface of the grating sensor to ablate the surface deposits and resin-rich material of the grating sensor. Step S8: Use a cleaning agent and an ultrasonic vibration cleaner to clean the ablated grating sensor and wait for the grating sensor to dry completely; Step S9: Using a dropper or brush, apply surfactant evenly to the area within the marking lines of the wind turbine blade and the bonding surface of the grating sensor to be bonded. Step S10: After the surfactant takes effect, use a brush or dropper to evenly apply the adhesive to the bonding surface of the grating sensor to be bonded, and then bond it to the installation position marked on the blade. Step S11: After the adhesive has completely solidified, use a cloth or wiping paper to clean the debris on the back of the grating sensor and the area within the marking lines on the blades. Step S12: Cover the grating sensor and contour area with protective material; Step S13: Organize the connecting optical cable and use adhesive material to fix the connecting optical cable to the outer surface of the blade.

2. The method for installing a grating sensor for testing wind turbine blades according to claim 1, characterized in that, In step S2, the spanwise spacing between the grating sensor outline and the marking line is greater than or equal to 100 mm, and the chordwise spacing is greater than or equal to 50 mm.

3. The method for installing a grating sensor for testing wind turbine blades according to claim 1, characterized in that, In step S2, the water-based marker is not black.

4. The method for installing a grating sensor for testing wind turbine blades according to claim 1, characterized in that, In step S3, the area within the marked line is polished until the surface roughness is between Ra3.2 and 6.

4.

5. The method for installing a grating sensor for testing wind turbine blades according to claim 1, characterized in that, In step S4, dimethyl carbonate solution is selected as the wiping agent.

6. The method for installing a grating sensor for testing wind turbine blades according to claim 1, characterized in that, In step S5, the power of the ultraviolet laser irradiator is 20W-40W, and the scanning speed is 100-500mm / s.

7. The method for installing a grating sensor for testing wind turbine blades according to claim 1, characterized in that, In step S6, the cleaning agent is an acetone solution with an acetone mass fraction greater than 90%.

8. The method for installing a grating sensor for testing wind turbine blades according to claim 1, characterized in that, In step S8, the ultrasonic power of the ultrasonic vibration cleaner is 50W and the standard ultrasonic frequency is 40KHz.

9. The method for installing a grating sensor for testing wind turbine blades according to claim 1, characterized in that, In step S10, after the bonding and positioning are completed, a layer of polyethylene or tetrafluoroethylene film is placed on the grating sensor. Excess adhesive and air bubbles are gently squeezed out with your fingers, and then released after 5-10 seconds.

10. The method for installing a grating sensor for testing wind turbine blades according to claim 1, characterized in that, In step S12, the protective material is viscoelastic tape.

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