A laboratory test environment simulation system and method for a wind turbine blade coating

Abstract

A simulation system and method for a wind turbine blade coating laboratory test environment provided by the present invention. The system includes a blower, a heat exchanger, a heating and cooling system, a humidifying system, a solid addition device, a dropping device, a flow equalizing mixer, an adjustable acceleration nozzle, a wind turbine blade housing coating test section, and a gas-solid separation device connected in sequence; the heating and cooling system, the humidifying system, the solid addition device, the droplet generation device, and the dehumidifying device are all provided with flow bypasses. This system can simulate the operating environment of the wind turbine blade coating from low speed to high speed, and the influences of factors such as sand and dust, rain erosion, ultraviolet rays, high temperature, and low temperature on the wind turbine blade coating can all be simulated through this system. Through this device, the operating environment of the wind turbine blade coating under various conditions can be truly restored.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power generation, and particularly relates to a simulation system and method for the laboratory test environment of a wind turbine blade coating. Background Art

[0002] With the continuous advancement of industrialization, the problem of climate warming brought about by industrialization has brought huge survival risks. In recent years, in order to address this severe problem, renewable energy power generation technologies have achieved rapid and substantial development. Wind power generation is a clean power generation technology that converts the kinetic energy of wind into electrical energy. Worldwide, the wind energy reserve is huge, and wind power generation is considered to be the supporting energy for future society and an important means to promote the adjustment of the energy structure.

[0003] On the other hand, during the operation of a wind turbine, the blade is a key component for capturing wind energy, and the coating of the wind turbine blade housing plays an important protective role. Under coating damage, the aerodynamic shape of the blade will change, resulting in a decrease in the efficiency of the wind turbine blade and even corresponding safety accidents. Therefore, it is extremely necessary to conduct tests on the corresponding coating. Currently, wind turbines deployed worldwide are increasingly developing towards large-scale and high-altitude. The length of wind turbine blades is getting longer, and the blade linear velocity also increases accordingly. At a rotational speed of 10 rad / min, the linear velocity at 80 m from the hub of the blade can reach 80 m / s. In this case, it is extremely difficult to reproduce the ultra-high-speed rotation of the blade in the laboratory; at the same time, when the wind turbine is operating, the blade coating is greatly affected by the surrounding environmental factors. Factors such as sand and dust, rain erosion, ultraviolet rays, high temperature, and low temperature will significantly affect the service life of the blade coating, but it is very difficult to fully reproduce the above environmental factors during the laboratory test. Currently, the existing wind turbine blade coating test systems cannot comprehensively consider the effects of high speed, reproduction of various environmental factors, and other conditions on the blade coating. Summary of the Invention

[0004] To solve the problem that the existing wind turbine blade coating test cannot simulate the actual environment, the present invention provides a simulation system and method for the laboratory test environment of a wind turbine blade coating. This system can simulate the operating environment of the wind turbine blade coating at extremely high speeds and the effects of factors such as sand and dust, rain erosion, ultraviolet rays, high temperature, and low temperature on the wind turbine blade coating, providing a relatively realistic environmental simulation plan for the test.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A test system for a wind turbine blade housing coating, comprising a blower, a heat exchanger, a heating-cooling system, a humidifying system, a solid substance adding device, a dropping device, a uniform flow mixer, an adjustable acceleration nozzle, a test section for the wind turbine blade housing coating, and a gas-solid separation device connected in sequence;

[0007] The heating-cooling system, humidification system, solid addition device, droplet generation device, and dehumidification device are all provided with flow bypasses.

[0008] As a further improvement of the present invention, a dehumidification device is further included;

[0009] When the heat exchanger adopts a non-material exchange equipment type, the dehumidification device is installed at the position between the exhaust port of the air blower and the intake port on one side of the heat exchanger; when the heat exchanger adopts a heat exchanger type with simultaneous heat and material exchange, or when the heating-cooling system selects heating and cooling methods with material exchange with the outside world, the dehumidification device is installed at any position in the pipeline after the exhaust port of the air blower and before the intake of the solid addition device.

[0010] As a further improvement of the present invention, the heat exchanger is used for heat exchange between the exhausted system air flow and the incoming system air flow, and corresponding intake and exhaust ports are respectively provided on both sides. The side connected to the exhaust port of the air blower is one side, and the side directly connected to the external space atmosphere is the second side.

[0011] As a further improvement of the present invention, the gas-solid separation device has an intake port, an exhaust port, and a solid discharge port. The intake port of the gas-solid separation device is connected to the coating test section of the wind turbine blade housing, and the exhaust port of the gas-solid separation device is connected to the intake port on the second side of the heat exchanger; the solid discharge port of the gas-solid separation device is connected to the feed port of the solid addition device, and the solid is transported between the gas-solid separation device and the solid addition device through a pneumatic pipeline or a conveyor belt.

[0012] As a further improvement of the present invention, the intake port of the adjustable acceleration nozzle is a non-adjustable large-diameter port, and the exhaust port is an adjustable small-diameter port.

[0013] As a further improvement of the present invention, the coating test section of the wind turbine blade housing has an intake port and an exhaust port, and the outflow direction of the intake port should be directly opposite to the coating test sample of the wind turbine blade housing; the coating test sample of the wind turbine blade housing is fixedly placed at a position directly opposite to the outflow of the intake port, and the distance does not exceed five times the equivalent diameter of the intake port.

[0014] As a further improvement of the present invention, an ultraviolet lamp should be installed inside the coating test section of the wind turbine blade housing.

[0015] A test method for a coating test system of a wind turbine blade housing includes the following steps:

[0016] When the wind turbine blade coating laboratory test environment simulation system starts testing, there is a target test condition. Under this condition, the corresponding air flow velocity, temperature, and humidity values of the simulated environment are V, T, and H respectively. When the target condition is the solid matter erosion condition, the mass flow rate of the solid matter contained in the target condition is M, and the time of this test condition is t;

[0017] Start the air blower, and the air flow in the system begins to flow. At this time, the heating-cooling system, humidification system, solid matter adding device, droplet generating device, and dehumidifying device are all in the closed state, so that the air flow velocity V9 = V 1-max , and keep the system running in this state for a period of time; the maximum wind speed that the air blower can deliver is V 1-max ;

[0018] If the target condition is the rain erosion condition, start the droplet generating device and add larger droplets to the air flow. The temperature of the added droplets should be equal to T;

[0019] If the target condition is the solid matter erosion condition, start the solid matter adding device and add solid matter to the air flow. The added solid matter flow rate M5 should be equal to M;

[0020] If, in the target condition, it is necessary to test the performance of the wind turbine blade shell coating under ultraviolet irradiation conditions, the ultraviolet lamp in the wind turbine blade shell coating test section should be turned on and the light intensity should be adjusted to the target light intensity;

[0021] After the target condition ends, if at this time the humidity value H9 > H, start the dehumidifying device to reduce the humidity of the air flow to H9 = H; if at this time H9 ≤ H, start the humidifying device to increase the humidity of the air flow to H9 = H;

[0022] If the temperature T9 > T, start the heating-cooling system in the cooling mode to make the air flow temperature drop until T9 = T; if at this time T9 ≤ T, start the heating-cooling system in the heating mode to make the air flow temperature rise until T9 = T;

[0023] If V9 > V, reduce the power of the air blower until V9 = V; if at this time V9 ≤ V, increase the power of the air blower until V9 = V;

[0024] Keep the system running until the running time reaches the running time t of the target condition to complete the test process.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] A laboratory test environment simulation system for a wind turbine blade coating according to the present invention can simulate the operating environment of the wind turbine blade coating at extremely high speeds. The effects of factors such as sand and dust, rain erosion, ultraviolet rays, high temperature, and low temperature on the wind turbine blade coating can all be simulated through this system. Through this device, the operating environment of the wind turbine blade coating under various conditions can be truly restored, effectively improving the development progress and inspection speed of the wind turbine blade coating, and directly promoting the better and faster development of the wind power industry. At the same time, this system is equipped with devices such as a gas-solid separation device and a heat exchanger, which can effectively recover the heat and solids during the experiment, reduce the energy consumption during the experiment, and the recovery of solids can reduce the pollution to the surrounding environment. The system has the effect of energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure of the present invention in any way. Additionally, the shapes and proportional dimensions of the various components in the drawings are only schematic and are used to assist in the understanding of the present invention, rather than specifically defining the shapes and proportional dimensions of the various components of the present invention. In the drawings:

[0028] Figure 1 is a laboratory test environment simulation system for a wind turbine blade coating according to the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In order to enable those skilled in the art of this technical field to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0030] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] As shown Figure 1 in the figure, a wind turbine blade housing coating test system provided by the present invention includes a blower 1, a heat exchanger 2, a heating-cooling system 3, a humidifying system 4, a solid matter adding device 5, a dropping device 6, a flow equalizing mixer 7, an adjustable acceleration nozzle 8, a wind turbine blade housing coating test section 9, a gas-solid separation device 10, and a dehumidifying device 11. Among them, the dehumidifying device 11 can be installed at any position between the exhaust port of the blower 1 and the intake port on one side of the heat exchanger 2 or after the exhaust port of the blower 1 and before the intake pipeline of the solid matter adding device 5 according to the type of its dehumidification equipment, the type of the heat exchanger 2, and the type of the heating-cooling system 3. Without considering the dehumidifying device 11:

[0033] The blower 1 has an intake port and an exhaust port. After inhaling air, it can boost and transport the air. Its intake port is connected to the external space atmosphere for suction from the external space. A grid structure should be provided at the intake port to prevent corresponding foreign matters from being inhaled into the interior of the blower 1. The air flow after boosting and accelerating is discharged through the exhaust port and input into the intake port equipment on one side of the heat exchanger 2 through a pipeline. By changing the power applied to it, its flow rate can be adjusted, which affects the flow velocity of the test air flow. The maximum wind speed it can transport is V 1-max .

[0034] The heat exchanger 2 is used for heat exchange between the exhausted system air flow and the incoming system air flow. There are corresponding intake and exhaust ports on both sides. The side connected to the exhaust port of the blower 1 is one side, and the side directly connected to the external space atmosphere is the second side; the heat exchanger 2 can adopt equipment types such as rotary type, heat pipe type, plate fin type, etc. When adopting a heat exchanger type such as rotary type for simultaneous heat and mass exchange, the relative position of the dehumidifying device 11 needs to be considered. The air flow output from the exhaust port of the blower 1 enters the heat exchanger 2 from the intake port on one side of the heat exchanger 2, and after heat recovery preheating or precooling, it is discharged from the exhaust port on one side and flows into the heating-cooling system 3.

[0035] The heating-cooling system 3 is used for further heating and cooling of the preheated and precooled air flow. The exhaust port on one side of the heat exchanger 2 is connected to the intake port of the heating-cooling system 3, and the exhaust port of the heating-cooling system 3 is connected to the intake port of the humidifying system 4. The equipment of the heating-cooling system 3 can select heating and cooling equipment without material exchange with the outside world, such as electric heating, compression refrigeration, heat pump, etc. If heating and cooling technologies with material exchange with the outside world, such as spraying, etc. are selected, the relative position of the dehumidifying device 11 needs to be considered.

[0036] The humidification system 4 is used to further humidify the air flow heated and cooled by the heating-cooling system 3. It can spray high-temperature or low-temperature water vapor or high-temperature or low-temperature high-humidity air into the air flow to achieve the corresponding humidification purpose. When the corresponding water vapor and air are injected into the main air flow, it will cause changes in the overall temperature of the main air flow and the air flow velocity at the same time. Therefore, it can work as an auxiliary heating and cooling device.

[0037] The solid substance adding device 5 is used to simulate the erosion of the solid substances on the blade coating of the wind turbine under the conditions of simulated flying sand and dust. It has an air inlet, a feed inlet and an exhaust outlet, and can add related solid substances such as sand and dust into the air flow. The solid substances enter the main air flow through the feed inlet by pneumatic injection or gravity. The general size of the added solid substances is not more than 1000 microns. A filtering device is installed after the feed inlet of the solid substance adding device 5, which has filtering ability to filter the solid substances that do not meet the standard of a diameter size less than 1000 microns, so as to avoid their deposition in the pipeline of the system and blocking the system after entering the system. The mass flow rate of the solid substances added to the system is M5. The gas-solid separation device 10 has an air inlet, an exhaust outlet and a solid discharge outlet, and is used to separate and screen out the solid substances in the tested air flow. On the one hand, it avoids polluting the external space atmosphere by discharging them, and on the other hand, it recovers the solid substances and adds them into the system repeatedly to reduce the consumption of solid substances. The air inlet of the gas-solid separation device 10 is connected to the coating test section 9 of the wind turbine blade housing. The air flow flowing through the coating test section enters the gas-solid separation device 10 from the air inlet. The exhaust outlet of the gas-solid separation device 10 is connected to the two-side air inlets of the heat exchanger 2. The gas after gas-solid separation continues to flow into the two-side air inlets of the heat exchanger 2 through the exhaust outlet for heat recovery. The solid discharge outlet of the gas-solid separation device 10 is connected to the feed inlet of the solid substance adding device 5. The solid substances can enter the feed inlet of the solid substance adding device 5 from the solid discharge outlet of the gas-solid separation device 10 to realize the reuse of the solid substances. The solid substance transportation between the gas-solid separation device 10 and the solid substance adding device 5 can be carried out through a pneumatic pipeline or a conveyor belt.

[0038] The droplet generating device 6 is used to add larger formed droplets into the air flow to simulate the test environment under the rainfall condition and the effect of raindrops on the blade coating. On the one hand, when the water droplets enter the main air flow, it will cause changes in the overall temperature of the main air flow and the air flow velocity at the same time. Therefore, it can work as an auxiliary heating and cooling device. On the other hand, when the water droplets enter the main air flow, it will also affect the humidity of the main air flow. It is also an auxiliary main air flow humidity regulating device.

[0039] The uniform flow mixer 7 is used to make the air flow uniform after flowing through the air blower 1, the heat exchanger 2, the heating-cooling system 3, the humidifying system 4, the solid addition device 5, the droplet generation device 6, and the dehumidifying device 11, so as to make the flow field uniform and avoid the phenomenon of uneven distribution of solids, droplets, etc. caused by excessive air flow turbulence.

[0040] The adjustable acceleration nozzle 8 is used to further accelerate the air flow that has been made uniform by the uniform flow mixer 7. The air inlet of the adjustable acceleration nozzle 8 is a large-diameter port, the size of which cannot be adjusted, and the exhaust port is a small-diameter port, the size of which can be adjusted. By adjusting the size of the small-diameter port, the acceleration degree of the air flow can be adjusted. The maximum diameter of the exhaust port is equal to the air inlet, so its acceleration ratio should be greater than or equal to 1. The accelerated air flow directly flows into the wind turbine blade housing coating test section 9. Corresponding flow velocity, temperature, and humidity measuring devices are installed at the outlet of the exhaust port, and the measured values of the air flow velocity, temperature, and humidity at this place are V9, T9, and H9 respectively.

[0041] The wind turbine blade housing coating test section 9 has an air inlet and an exhaust port. The air flow that has flowed through the air blower 1, the heat exchanger 2, the heating-cooling system 3, the humidifying system 4, the solid addition device 5, the droplet generation device 6, the dehumidifying device 11, the uniform flow mixer 7, and the adjustable acceleration nozzle 8 flows into the test section from the air inlet, and the outflow direction of the air inlet should be directly opposite to the wind turbine blade housing coating test specimen. The wind turbine blade housing coating test specimen should be fixedly placed at a position directly opposite to the outflow of the air inlet, and its distance should not exceed five times the equivalent diameter of the air inlet to avoid the deceleration of the air flow during the spraying process. At the same time, no other items should be set between the specimen and the air inlet to avoid interfering with the flow of the air flow. The wind turbine blade housing coating test specimen should be firmly fixed on a rack, a table, or other fixed equipment to avoid the specimen being blown away by the high-speed air flow. An ultraviolet lamp should be installed inside the wind turbine blade housing coating test section 9, and its model and installation position should avoid interfering with the main air flow, while ensuring that the ultraviolet light can irradiate the windward surface of the wind turbine blade housing coating test specimen to test the performance of the wind turbine blade housing coating under ultraviolet irradiation. The air flow flowing through the wind turbine blade housing coating specimen flows out through the exhaust port and into the gas-solid separation device 10.

[0042] The dehumidifying device 11 is used to remove the humidity of the air flow passing through it and reduce the humidity of the test air flow for flushing the sample. When the dehumidifying device adopts the condensation dehumidification technology, and the heating-cooling system 3 selects heating and cooling equipment that has no material exchange with the outside world, such as electric heating, compression refrigeration, heat pump, etc., and the heat exchanger 2 adopts a heat pipe type, plate fin type or other equipment types without material exchange, the dehumidifying device should be installed at the position between the exhaust port of the blower 1 and the intake port on one side of the heat exchanger 2 to avoid a large impact of temperature change on the dehumidification effect; when the heat exchanger 2 adopts a heat exchanger type such as a rotary type that exchanges heat and matter simultaneously, or the heating-cooling system 3 selects heating and cooling technologies that have material exchange with the outside world, such as spraying, etc., the dehumidifying device 11 should be installed at any position in the pipeline after the exhaust port of the blower 1 and before the intake port of the solid addition device 5. The dehumidifying device 11 should adopt dehumidification technologies with low temperature requirements, such as solid adsorption, liquid adsorption, inertial separation, etc.

[0043] The heating-cooling system 3, humidifying system 4, solid addition device 5, droplet generation device 6, and dehumidifying device 11 all have flow bypasses. When the above systems are closed, the air flow can pass through them without being affected and changing properties such as flow rate, temperature, and humidity.

[0044] This system can simulate the operating environment of the wind turbine blade coating from low speed to high speed. The influences of factors such as sand and dust, rain erosion, ultraviolet rays, high temperature, and low temperature on the wind turbine blade coating can all be simulated through this system. The operating environment of the wind turbine blade coating under various conditions can be truly restored through this device. At the same time, this system is equipped with equipment such as a gas-solid separation device and a heat exchanger, which can effectively recover the heat and solids during the experiment, reduce the energy consumption during the test, and the recovery of solids can reduce the pollution to the surrounding environment, having the effect of energy conservation and emission reduction.

[0045] The working principle of the present invention is as follows:

[0046] When the wind turbine blade coating laboratory test environment simulation system starts testing, there is a target test condition. The corresponding air flow velocity, temperature, and humidity values of the simulated environment under this condition are V, T, and H respectively. When the target condition is the solid erosion condition, the mass flow rate of the solids contained in the target condition is M, and the time of this test condition is t.

[0047] When V ≤ V 1-max :

[0048] Step 1: First, start the air blower 1. The air flow in the system begins to flow. At this time, the heating-cooling system 3, the humidification system 4, the solid addition device 5, the droplet generation device 6, and the dehumidification device 11 are all in the closed state. The adjustable acceleration nozzle 8 is adjusted so that the diameters of the exhaust port and the intake port are the same, and the air flow velocity V9 reaches V. Let the system operate in this state for a period of time so that the air flow can carry away foreign matters such as deposited solids and accumulated water in the system.

[0049] Step 2: After operating in the state of Step 1 for a period of time, if the target working condition is the rain erosion working condition, start the droplet generation device 6 and add larger droplets to the air flow. The temperature of the added droplets should be equal to T; if the target working condition is not the rain erosion working condition, the droplet generation device 6 remains closed.

[0050] Step 3: If the target working condition is the solid erosion working condition, start the solid addition device 5 and add solids to the air flow. The solid flow rate M5 added should be equal to M; if the target working condition is not the solid erosion working condition, the solid addition device 5 remains in the closed state.

[0051] Step 4: If, in the target working condition, it is necessary to test the performance of the coating on the wind turbine blade housing under ultraviolet irradiation conditions, turn on the ultraviolet lamp in the test section 9 of the coating on the wind turbine blade housing and adjust the light intensity to the target light intensity; if, in the target working condition, it is not necessary to test the performance of the coating on the wind turbine blade housing under ultraviolet irradiation conditions, do not turn on the ultraviolet lamp.

[0052] Step 5: After Step 4 is completed, if at this time, H9 > H, start the dehumidification device 11 to reduce the humidity of the air flow until H9 = H; if at this time H9 ≤ H, start the humidification device to increase the humidity of the air flow until H9 = H.

[0053] Step 6: After Step 5 is completed, if at this time, T9 > T, start the heating-cooling system 3 in the cooling mode to lower the air flow temperature until T9 = T; if at this time, T9 ≤ T, start the heating-cooling system 3 in the heating mode to increase the air flow temperature until T9 = T.

[0054] Step 7: After Step 6 is completed, check V9. If at this time V9 > V, the air blower reduces its power until V9 = V; if at this time V9 ≤ V, the air blower increases its power until V9 = V.

[0055] Step 8: Repeat Steps 5, 6, and 7 until it is readjusted to V9 = V.

[0056] Step 9: Keep the system in the operating state when Step 8 is completed until the operating time reaches the operating time t of the target working condition.

[0057] Step 10, turn off the solid addition device 5, droplet generation device 6, heating-cooling system 3, humidification system 4, and dehumidification device 11 in sequence. Keep the blower 1 running until V9, T9, and H9 no longer change significantly, and then keep the blower 1 running for a period of time. The airflow will carry away foreign matters such as solids and accumulated water deposited in the system. Then turn off the blower 1 to complete a target working condition.

[0058] When V > V 1-max :

[0059] Step 1, first start the blower 1, and the airflow in the system starts to flow. At this time, the heating-cooling system 3, humidification system 4, solid addition device 5, droplet generation device 6, and dehumidification device 11 are all in the closed state. Increase the power of the blower 1 to the maximum to make V9 = V 1-max , and then reduce the exhaust port diameter of the adjustable acceleration nozzle 8 to make the airflow velocity of V9 reach V, and keep the system running in this state for a period of time to let the airflow carry away foreign matters such as solids and accumulated water deposited in the system.

[0060] Step 2, after running in the state of Step 1 for a period of time, if the target working condition is the rain erosion working condition, start the droplet generation device 6 and add larger droplets to the airflow. The temperature of the added droplets should be equal to T; if the target working condition is not the rain erosion working condition, the droplet generation device 6 continues to be kept closed.

[0061] Step 3, if the target working condition is the solid erosion working condition, start the solid addition device 5 and add solids to the airflow. The solid flow rate M5 added should be equal to M; if the target working condition is not the solid erosion working condition, the solid addition device 5 continues to be kept in the closed state.

[0062] Step 4, if in the target working condition, it is necessary to test the performance of the wind turbine blade housing coating under ultraviolet irradiation conditions, turn on the ultraviolet lamp in the wind turbine blade housing coating test section 9 and adjust the light intensity to the target light intensity; if in the target working condition, it is not necessary to test the performance of the wind turbine blade housing coating under ultraviolet irradiation conditions, do not turn on the ultraviolet lamp.

[0063] Step 5, after Step 4 ends, if at this time, H9 > H, start the dehumidification device 11 to reduce the humidity of the airflow until H9 = H; if at this time H9 ≤ H, start the humidification device to increase the humidity of the airflow until H9 = H.

[0064] Step 6, after Step 5 ends, if at this time, T9 > T, start the heating-cooling system 3 in the cooling mode to lower the airflow temperature until T9 = T; if at this time, T9 ≤ T, start the heating-cooling system 3 in the heating mode to increase the airflow temperature until T9 = T.

[0065] Step 7, after step 6 ends, check V9. If V9 > V at this time, increase the exhaust port diameter of the adjustable acceleration nozzle 8 until V9 = V; if V9 ≤ V at this time, decrease the exhaust port diameter of the adjustable acceleration nozzle 8 until V9 = V.

[0066] Step 8, repeat steps 5, 6, and 7 until it is readjusted to V9 = V again.

[0067] Step 9, keep the system in the operating state when step 8 is completed until the operating time reaches the operating time t of the target working condition.

[0068] Step 10, sequentially turn off the solid addition device 5, the droplet generation device 6, the heating-cooling system 3, the humidification system 4, and the dehumidification device 11. Adjust the adjustable acceleration nozzle 8 so that the exhaust port and the intake port have the same diameter. Keep the blower 1 running until V9, T9, and H9 no longer change significantly, and then keep the blower 1 running for a period of time. The airflow will carry away foreign matters such as solid deposits and accumulated water in the system, and then turn off the blower 1 to complete a target working condition.

[0069] The embodiments of the present invention have been introduced in detail above. This specification describes the present invention in combination with specific examples. The specific implementation manners and application scopes should not be limited to this specification. This specification should not be construed as a limitation of the present invention.

[0070] It should be noted that in the description of the present invention, terms such as "first" and "second" are only used for descriptive purposes and to distinguish similar objects. There is no sequence between the two, nor can it be construed as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0071] It should be understood that the above description is for illustrative purposes rather than for limitation. By reading the above description, many embodiments and many applications other than the provided examples will be obvious to those skilled in the art. Therefore, the scope of this teaching should not be determined by the above description, but should be determined by the foregoing claims and the full scope of the equivalents of these claims. For the sake of comprehensiveness, all articles and references including patent applications and published announcements are incorporated herein by reference. Omitting any aspect of the subject matter disclosed herein in the foregoing claims is not to abandon such subject matter, nor should it be considered that the applicant has not considered such subject matter as part of the disclosed inventive subject matter.

Claims

1. A testing method for a testing system of a wind turbine blade housing coating, characterized in that, The system includes a blower (1), a heat exchanger (2), a heating-cooling system (3), a humidifying system (4), a solid addition device (5), a droplet generation device (6), a flow equalizing mixer (7), an adjustable acceleration nozzle (8), a test section for the coating of the wind turbine blade housing (9), and a gas-solid separation device (10) connected in sequence; The heating-cooling system (3), the humidifying system (4), the solid addition device (5), the droplet generation device (6), and the dehumidifying device (11) are all provided with flow bypasses; It also includes a dehumidifying device (11); When the heat exchanger (2) adopts a non-material exchange equipment type, the dehumidifying device (11) is installed at the position between the exhaust port of the blower (1) and the intake port on one side of the heat exchanger (2); when the heat exchanger (2) adopts a heat exchanger type with simultaneous heat and material exchange, or when the heating-cooling system (3) selects a heating and cooling method with material exchange with the outside world, the dehumidifying device (11) is installed at any position in the pipeline after the exhaust port of the blower (1) and before the intake of the solid addition device (5); The heat exchanger (2) is used for heat exchange between the exhaust gas flow of the system and the intake gas flow of the system, and is respectively provided with corresponding intake and exhaust ports on both sides. The side connected to the exhaust port of the blower (1) is one side, and the side directly connected to the external space atmosphere is the second side; The test method includes the following steps: When the wind turbine blade coating laboratory test environment simulation system starts testing, there is a target test condition. The corresponding air flow velocity, temperature, and humidity values of the simulated environment under this condition are V , T , H . When the target condition is the solid matter erosion condition, the mass flow rate of the solid matter contained in the target condition is M , and the time of this test condition is t; Start the blower (1), and the air flow in the system begins to flow. At this time, the heating-cooling system (3), the humidification system (4), the solid addition device (5), the droplet generation device (6), and the dehumidification device (11) are all in the closed state, so that the air flow velocity V 9= V 1-max , and let the system run in this state for a period of time; the maximum wind speed that the blower (1) can deliver is V 1-max ; If the target working condition is the rain erosion working condition, start the droplet generation device (6) to add larger droplets into the air flow, and the temperature of the added droplets should be equal to T； If the target working condition is the solid erosion working condition, start the solid addition device (5) to add solids to the air stream, and the added solid flow rate M 5 shall be equal to M ; If in the target working condition, it is necessary to test the performance of the coating of the wind turbine blade housing under ultraviolet irradiation, the ultraviolet lamp in the test section for the coating of the wind turbine blade housing (9) should be turned on and the light intensity should be adjusted to the target light intensity; After the target working condition ends, if at this time, the humidity value H 9 > H , then start the dehumidification device (11) to reduce the humidity of the air flow to H 9 = H ; if at this time H 9 ≤ H , then start the humidification device to increase the humidity of the air flow to H 9 = H ; If the temperature T 9 > T， then start the heating-cooling system (3) in the cooling mode to lower the air flow temperature until T 9 = T ; if at this time T 9 ≤ T， then start the heating-cooling system (3) in the heating mode to raise the air flow temperature until T 9 = T ; If V 9 > V , the blower reduces its power until V 9 = V； If at this time V 9 ≤ V , the blower increases its power until V 9 = V ; Keep the system running until the running time reaches the running time t of the target working condition to complete the test process; The gas-solid separation device (10) has an intake port, an exhaust port, and a solid discharge port. The intake port of the gas-solid separation device (10) is connected to the test section for the coating of the wind turbine blade housing (9), and the exhaust port of the gas-solid separation device (10) is connected to the intake port on the second side of the heat exchanger (2); the solid discharge port of the gas-solid separation device (10) is connected to the feed port of the solid addition device (5), and the solid is transported between the gas-solid separation device (10) and the solid addition device (5) through a pneumatic pipeline or a conveyor belt; The test section for the coating of the wind turbine blade housing (9) has an intake port and an exhaust port, and the outflow direction of the intake port should be directly opposite to the test sample of the coating of the wind turbine blade housing; the test sample of the coating of the wind turbine blade housing is fixedly placed at a position directly opposite to the outflow of the intake port, and the distance does not exceed five times the equivalent diameter of the intake port; The intake port of the adjustable acceleration nozzle (8) is a non-adjustable large-diameter port, and the exhaust port is an adjustable small-diameter port; An ultraviolet lamp should be installed in the test section for the coating of the wind turbine blade housing (9).

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