A wind turbine nacelle hub interior cleaning and maintenance device

Abstract

The application discloses a kind of wind power generator cabin inner hub internal cleaning and maintenance device, including installation disc, gas distribution tank, gas supply unit, heating assembly, cleaning unit and electric control system, installation disc is fixed to unit body and rotates relative hub, end face is equipped with multiple groups of cleaning flow channel;Gas distribution tank is equipped with two-stage communication cavity and is communicated with ash removal pipeline;Gas supply unit constructs multiple-path positive and negative pressure airflow, respectively realizes hub dust negative pressure adsorption, positive pressure purging and cavity automatic ash removal;Heating assembly is heated to assist to remove viscous impurities and residual moisture;Cleaning unit transports cleaning agent to soak and flush surface impurities;Electric control system linkage control each component and control valve group realizes automatic cleaning operation.This device integrates dust collection, cleaning, drying multifunction, compact structure adapts to narrow space in cabin, can rotate with hub without dead angle cleaning, replace high-altitude manual operation, eliminate safety hazard, and unit does not need to stop operation and maintenance, effectively improve cleaning efficiency and power generation benefit.

Description

Technical Field

[0001] This invention relates to the field of wind turbine cleaning technology, specifically to a cleaning and maintenance device for the interior of the hub of a wind turbine nacelle. Background Technology

[0002] Existing wind turbine generators are typically deployed in high-altitude outdoor environments. Due to the complex atmospheric environment at high altitudes, a large amount of particulate impurities such as dust and sand are suspended in the air, and they are constantly affected by natural environmental factors such as wind, sun, and rain. As the core load-bearing component of the rotor, the hub continuously accumulates dust, sand, and other impurities from the air during long-term high-speed rotation. At the same time, factors such as humidity and oil adhesion may cause impurities to clump and adhere to the inner surface of the hub, making them difficult to remove.

[0003] Currently, cleaning the inside of the wind turbine hubs mainly relies on manual cleaning by staff on a regular basis. However, cleaning operations require the wind turbines to be shut down, and the inability of wind turbines to generate electricity during shutdown will directly cause significant economic losses, especially for large wind farms where the loss of power generation due to prolonged shutdown is even more pronounced. At the same time, staff need to work at heights, requiring specialized aerial work platforms to reach the hubs. Working at heights is not only labor-intensive, inefficient, and time-consuming, but also poses safety hazards such as falls from heights and equipment malfunctions, seriously threatening the personal safety of the staff. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a cleaning and maintenance device for the interior of the hub of a wind turbine nacelle, so as to solve the technical problems mentioned in the prior art.

[0005] A cleaning and maintenance device for the interior of the hub inside a wind turbine nacelle, comprising: The mounting plate is located on one side of the wheel hub and has several sets of cleaning channels spaced apart along the end face near the wheel hub. The cleaning channels have at least one of the following: a dust suction channel, a cleaning channel, and a drying channel. The gas distribution box has at least two interconnected chambers, a first chamber and a second chamber, which are capable of filtering particulate materials along the gas flow direction. The first chamber is connected to the drying channel, and the second chamber is connected to the dust collection channel. A dust discharge pipe is provided at the bottom of the second chamber. A heating chamber and a gas supply unit are arranged sequentially along the gas flow direction on the side of the first chamber away from the second chamber. The gas supply unit inputs positive pressure into the drying channel through the first chamber to blow the hub, and inputs negative pressure into the dust collection channel through the second chamber to absorb the dust adhering to the surface of the hub, or sequentially flows through the first chamber and the second chamber to input positive pressure into the dust discharge pipe for dust discharge. A heating component, disposed within the heating chamber, is used to heat-treat the gas flowing through the heating chamber to bring it to a preset value; The cleaning unit, whose output end is connected to the cleaning channel, is used to pump the cleaning agent through the cleaning channel into the part of the wheel hub to be cleaned to soak and rinse the impurities adhering to its surface. An electronic control system is connected to the gas supply unit, the heating component, the cleaning unit, and the control valve group. The control valve group is at least used to control the connection and disconnection between the first cavity and the drying channel, and between the second cavity and the dust suction channel and / or the ash discharge pipeline.

[0006] Optionally, the electronic control system activates a corresponding control mode according to preset control logic, the control mode including: Dust removal mode: Control the second cavity to connect with the dust suction channel, and start the gas supply unit to input negative pressure into the dust suction channel to absorb the dust adhering to the surface of the wheel hub; Cleaning mode: The cleaning unit is activated to pump the cleaning agent through the cleaning channel into the part of the wheel hub to be cleaned, soaking and rinsing the impurities adhering to its surface; Drying mode: The heating component is controlled to preheat the interior of the heating chamber. When the preheating temperature reaches the target value, the first chamber is connected to the drying channel, and the gas supply unit is activated to input positive pressure into the drying channel to purge the hub. At the same time, the current input gas temperature in the drying channel is monitored in real time and the heating temperature of the heating component is dynamically adjusted so that the current input gas temperature in the drying channel is within the preset purging range. Ash removal mode: Control the second cavity to connect with the ash removal pipeline, and start the gas supply unit to control it to input positive pressure into the ash removal pipeline for ash removal; The dust removal mode, the cleaning mode, and the drying mode operate independently; The ash removal mode can operate synchronously with the cleaning mode or the drying mode.

[0007] Optionally, the cleaning channel and the drying channel are configured as the same media conveying channel, and a self-locking spraying mechanism is provided in the media conveying channel. The self-locking spraying mechanism includes: An installation groove is provided extending outwards from the center side of the medium conveying channel; A connecting rod is inserted into the mounting groove. A baffle plate is provided on the side of the connecting rod near the inlet of the medium conveying channel. A guide part is provided on the other end of the connecting rod through the outlet of the medium conveying channel. A flow passage is formed by a clearance fit between the outer wall of the connecting rod and the inner wall of the medium conveying channel. A guide member is provided on the connecting rod and is slidably connected to the mounting groove. An overflow port is provided on the guide member along the medium flow direction. A first spring is sleeved on the connecting rod, and the two ends of the first spring are respectively connected to the inner wall opposite surfaces of the guide and the baffle plate; When the first spring is in its initial state, the baffle plate is in close contact with the inlet of the medium conveying channel, and the guide portion is in close contact with the outlet of the medium conveying channel.

[0008] Optionally, a first coil and a second coil are provided on the outer periphery of the mounting plate; The first coil is provided with first connectors that are equally spaced and correspond one-to-one with the number of media conveying channels. The first connectors pass through and connect the inner cavity of the first coil and the inlet of the media conveying channel. The first coil is provided with an air injection port and a liquid injection port. The air injection port is connected to the first cavity through a pipe, and the liquid injection port is connected to the output end of the cleaning unit. The second coil is provided with second connectors that are equally spaced and correspond one-to-one with the number of dust suction channels. The second connectors pass through and connect the inner cavity of the second coil and the outlet of the dust suction channel. The second coil is provided with an air extraction port, which is connected to the second cavity through a pipe. Control valve assemblies are installed at the air injection port, the liquid injection port, and the air extraction port.

[0009] Optionally, the dust suction channel is provided with an anti-clogging mechanism, the anti-clogging mechanism comprising: A flow channel is smoothly transitioned outwards from the center of the dust suction channel; A fixing component is provided inside the dust suction channel and located near its outlet. The fixing component has a guide hole along the gas flow direction and several flow ports located around the guide hole. A connecting column is inserted into the flow channel. One end of the connecting column passes through the guide hole and is provided with a sealing plate. The other end of the connecting column extends to the feed inlet side near the dust suction channel and is provided with a blocking plate. A second spring is sleeved on the connecting post, and the two ends of the second spring are respectively connected to the opposite surfaces of the fixing member and the sealing plate; When the second spring is in its initial state, the sealing plate is in close contact with the fixing member and completely covers all the flow ports, and the blocking plate is in close contact with the feed port of the dust suction channel.

[0010] Optionally, the cleaning channels are arranged in 3-12 groups at circumferential intervals along the mounting plate.

[0011] Optionally, the cleaning unit includes: The storage container has a hollow internal structure. A liquid level detection sensor is installed at a preset liquid level line inside the storage container to detect the liquid level information of the cleaning agent filled in the storage container in real time. A delivery pump has its inlet connected to the outlet of the storage tank via a pipe, and the outlet of the delivery pump is connected to the cleaning channel via a pipe. The precondition for starting the delivery pump is set to ensure that the liquid level of the cleaning agent in the storage tank meets the preset requirements.

[0012] Optionally, the gas supply unit is configured as at least one of a fan or a gas distribution device; The gas distribution equipment includes a vacuum generator and a high-pressure gas storage tank. The air intake of the vacuum generator and the air outlet of the high-pressure gas storage tank are respectively connected to the heating chamber through pipelines. Control valve groups are installed at both the air intake of the vacuum generator and the air outlet of the high-pressure gas storage tank.

[0013] Optionally, the electronic control system includes: The control module is electrically connected to the gas supply unit, the heating component, the cleaning unit, and the control valve group. The control module controls the gas supply unit, the heating component, the cleaning unit, and the control valve group to start the corresponding control mode based on preset control logic. The parameter setting module is electrically connected to the control module and is used to input the operating parameters of each control mode, generate preset control logic, and save it to the configuration file of the control module. The power supply module is electrically connected to the control module, the parameter setting module, the gas supply unit, the heating component, the cleaning unit, and the control valve group.

[0014] The electronic control system is connected to the user terminal via a remote communication protocol. The user terminal can start each control mode with one click on the operation interface based on preset control logic to execute the corresponding task within any maintenance cycle, or use the function selection key to independently control the start and stop of any control mode.

[0015] The beneficial effects that this invention can produce include: 1. The present invention provides a cleaning and maintenance device for the interior of a wind turbine nacelle and hub. This device utilizes an electronic control system in conjunction with a control valve group to precisely switch the airflow path of the gas distribution box and the operation of the cleaning unit and heating components. This allows multiple cleaning channels set on the mounting plate to replace manual entry into the hub for automatic cleaning operations. For example, the gas distribution box and cleaning unit automatically absorb and rinse impurities, and the heating components automatically dry the components. The entire process eliminates the need for personnel to work at heights, completely eliminating safety hazards such as falls from heights. It also significantly reduces the intensity of manual labor and ensures that the wind turbine can be cleaned and maintained simultaneously while in operation, thereby improving power generation efficiency.

[0016] 2. In this invention, the cleaning unit pumps cleaning agent into the area of ​​the wheel hub to be cleaned through the cleaning channel, softening and dissolving stubborn clumps of impurities. The negative pressure dust collection in the air distribution box quickly removes loose impurities from the surface and periphery of the wheel hub. The heating component heats the gas through the drying channel and dries it. The ash discharge pipeline achieves centralized discharge of impurities. By combining the above multiple cleaning modes, an integrated automatic operation and maintenance mechanism is constructed that integrates dust collection to remove loose impurities, cleaning to remove stubborn clumps, drying to prevent secondary adhesion, and centralized ash discharge. The multi-mode control of the electronic control system ensures that each link is connected and operated in an orderly manner, realizing integrated and automated cleaning and maintenance, greatly improving cleaning efficiency and effect, and completely solving the problem of difficult-to-remove clumps of impurities.

[0017] 3. In this invention, by setting a self-locking spraying mechanism and an anti-clogging mechanism, impurities can be prevented from entering the flow channel before the device is started, causing internal contamination and blockage. This ensures that the flow channel remains unobstructed, guarantees the normal operation of the device, and extends its service life. Simultaneously, integrating the cleaning and drying flow channels into a single media conveying flow channel simplifies the device structure and optimizes the overall flow channel layout. This adapts to the limited installation space of high-altitude wheel hubs and the cleaning process of cleaning first and then drying, ensuring that the media conveying flow channel remains dry after cleaning and maintenance. Furthermore, the compression of the first spring can be controlled by adjusting the input pressure, thereby adjusting the distance between the guide and the part of the wheel hub to be cleaned. For example, when blowing away sticky impurities, the airflow input pressure can be increased, allowing the airflow to be closer to the wheel hub surface under the guidance of the flow channel and guide to effectively remove sticky impurities. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a cleaning and maintenance device for the interior of a wind turbine hub in the nacelle according to the present invention; Figure 2 In this invention Figure 1 Sectional view at point AA; Figure 3 In this invention Figure 2 Enlarged view of point B; Figure 4 This is a schematic diagram of the structure of the guide and fixing components in part 3 of the present invention; Figure 5 In this invention Figure 1 A schematic diagram of the installation disk; Figure 6 In this invention Figure 1 A schematic diagram of the internal structure of the cleaning unit; Figure 7 This is a control principle diagram of a wind turbine nacelle hub internal cleaning and maintenance device according to the present invention; In the diagram: 1. Mounting plate; 11. Medium conveying channel; 12. Dust suction channel; 2. Gas distribution box; 21. First chamber; 22. Second chamber; 23. Ash discharge pipe; 3. Heating chamber; 4. Gas supply unit; 5. Heating assembly; 6. Cleaning unit; 61. Storage tank; 62. Liquid level detection sensor; 63. Conveying pump; 7. Electrical control system; 71. Control module; 72. Parameter setting module; 73. Power supply module; 8. Automatic... Locking spraying mechanism, 81. Mounting slot, 82. Connecting rod, 83. Baffle plate, 84. Guide part, 85. Guide component, 86. First spring, 87. First coil, 88. First connector, 89. Flow channel, 90. Anti-clogging mechanism, 91. Flow channel, 92. Fixing component, 93. Connecting column, 94. Sealing plate, 95. Blocking plate, 96. Second spring, 97. Second coil, 98. Second connector, 10. User terminal. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1 and Figure 2As shown, this invention provides a cleaning and maintenance device for the interior of a wind turbine nacelle hub, including a mounting plate 1, a gas distribution box 2, a gas supply unit 4, a heating component 5, a cleaning unit 6, and an electrical control system 7. The mounting plate 1 is rotatably mounted on one side of the hub and fixedly connected to the turbine body. Several sets of cleaning channels are spaced along the end face near the hub. Each cleaning channel has at least one of a dust suction channel 12, a cleaning channel, and a drying channel, for use in automated cleaning operations. The gas distribution box 2 contains at least two interconnected chambers, a first chamber 21 and a second chamber 22, capable of filtering particulate materials along the gas flow direction. The first chamber 21 is connected to at least a drying channel, and the second chamber 22 is connected to the dust suction channel 12. Furthermore, the bottom of the second chamber 22 is equipped with a dust discharge pipe 23; the side of the first chamber 21 away from the second chamber 22 is sequentially provided with a heating chamber 3 and a gas supply unit 4 along the gas flow direction. The gas supply unit 4 inputs positive pressure into the drying channel through the first chamber 21 to blow the wheel hub, and inputs negative pressure into the dust suction channel 12 through the second chamber 22 to absorb the dust adhering to the surface of the wheel hub, or sequentially flows through the first chamber 21 and the second chamber 22 to input positive pressure into the dust discharge pipe 23 for dust discharge. By integrating multiple airflow paths, it achieves a multi-functional and highly efficient cleaning operation mode, significantly improving the automation level and operation accuracy of wheel hub surface treatment, and the integrated structural design can reduce the device's weight. The installation is designed to accommodate the limited space of the wind turbine hub, allowing for rapid absorption of loose impurities from the hub surface via negative pressure within the suction channel 12. The heating component 5, located within the heating chamber 3, heats the gas flowing through it to a preset value. This value is then used to blow away sticky impurities and moisture from the hub surface using positive pressure input through the drying channel. The output of the cleaning unit 6 is connected to the cleaning channel, allowing cleaning agent to be pumped into the area of ​​the hub to be cleaned. This process soaks and rinses the impurities adhering to the surface, softening / dissolving the sticky or clump-like impurities. The cleaning unit 6, combined with rinsing or positive pressure blowing, effectively removes these impurities. The cleaning effect is achieved by connecting the electrical control system 7 with the gas supply unit 4, heating component 5, cleaning unit 6, and control valve group. The control valve group is used to control the opening and closing of the first chamber 21 and the drying channel, as well as the opening and closing of the second chamber 22 and the dust suction channel 12 and / or ash discharge pipe 23, to realize the automated control of the cleaning and maintenance process, replacing the traditional manual cleaning operation. This not only reduces the safety hazards of high-altitude operations, but also eliminates the need to stop the machine during cleaning and maintenance, effectively shortening the downtime of the wind turbine generator set and thus improving the power generation efficiency. At the same time, the mounting plate 1 and the generator shaft of the hub are connected by rotation, which can realize all-round cleaning operation during the rotation of the hub, avoiding the cleaning dead corners caused by the hardening of the cleaning components in the past.

[0021] In the above, the heating component 5 adopts an electric heating structure, which includes an electric heating element such as a nickel-chromium resistance wire disposed inside the heating chamber 3, and a temperature detection sensor such as a thermocouple disposed on the side near the first cavity 21. The temperature detection sensor detects the temperature information inside the heating chamber 3 in real time, and dynamically adjusts the heating power of the electric heating element according to the currently detected temperature information to ensure that the temperature inside the heating chamber 3 is within a preset range, such as heating to a temperature range of 20℃-50℃.

[0022] Furthermore, the electronic control system 7 activates the corresponding control mode according to the preset control logic. The control modes include: Dust removal mode: Control the second chamber 22 to connect with the dust suction channel 12, and start the gas supply unit 4 to control it to input negative pressure into the dust suction channel 12 to absorb the dust adhering to the surface of the wheel hub; Cleaning mode: The cleaning unit 6 is activated to pump the cleaning agent through the cleaning channel into the part of the wheel hub to be cleaned, and to soak and rinse the impurities adhering to its surface. Drying mode: The heating component 5 is controlled to preheat the interior of the heating chamber 3. When the preheating temperature reaches the target value, the first chamber 21 is connected to the drying channel, and the gas supply unit 4 is started to input positive pressure into the drying channel to purge the hub. At the same time, the current input gas temperature in the drying channel is monitored in real time and the heating temperature of the heating component 5 is dynamically adjusted so that the current input gas temperature in the drying channel is within the preset purging range. Ash removal mode: Control the second chamber 22 to connect with the ash removal pipeline 23, and start the gas supply unit 4 to control it to input positive pressure into the ash removal pipeline 23 for ash removal; Dust removal mode, cleaning mode and drying mode operate independently; The ash removal mode can operate synchronously with the cleaning or drying modes.

[0023] In the above-described manner, the coordinated operation of various control modes ensures that the device can adapt to cleaning needs with different levels of contamination, such as simple dust accumulation, stubborn adhering impurities, or humid environments. This avoids the waste of resources such as cleaning agents and electricity during the operation and maintenance of a single cleaning mode, as well as the drawbacks of not being able to quickly and effectively remove impurities. Furthermore, by optimizing the traditional cleaning structure and path, operation and maintenance costs can be reduced and cleaning quality improved. Simultaneously, the ash removal mode can simultaneously remove dust and other particulate impurities accumulated in the second chamber 22 through the ash removal pipe 23 while other modes are operating independently. This eliminates the need to wait until the overall cleaning operation is completed before processing, preventing the sucked-in dust and other particulate impurities from adhering to the inner wall of the second chamber 22 due to the humidity of the surrounding air, thus preventing subsequent cleaning difficulties. Furthermore, the device can work with the heating component 5 to heat the backflushing gas input into the second chamber 22, reducing the viscosity of the particulate impurities sucked into the second chamber 22 and allowing them to be quickly discharged from the ash removal pipe 23, extending the service life of the device.

[0024] Furthermore, such as Figure 2 , Figure 3 and Figure 4As shown, the cleaning channel and the drying channel are configured as the same media conveying channel 11. A self-locking spraying mechanism 8 is installed within this media conveying channel 11. The self-locking spraying mechanism 8 includes an installation groove 81 extending outwards from the center of the media conveying channel 11, a connecting rod 82, a guide member 85, and a first spring 86. The connecting rod 82 passes through the installation groove 81. A baffle plate 83 is provided on the side of the connecting rod 82 near the inlet of the media conveying channel 11. The other end of the connecting rod 82 passes through the outlet of the media conveying channel 11 and is provided with a guide portion 84. The outer wall of 2 and the inner wall of the medium conveying channel 11 are fitted together to form a flow channel 89; the guide 85 is provided on the connecting rod 82 and is slidably connected to the mounting groove 81, and the guide 85 is provided with a flow port along the medium flow direction; the first spring 86 is sleeved on the connecting rod 82, and the two ends of the first spring 86 are respectively connected to the inner wall opposite surfaces of the guide 85 and the baffle plate 83; when the first spring 86 is in the initial state, the baffle plate 83 is tightly fitted with the inlet of the medium conveying channel 11, and the guide part 84 is tightly fitted with the outlet of the medium conveying channel 11. By integrating the cleaning and drying channels into a single media conveying channel 11, the device structure is simplified and the overall channel layout is optimized to accommodate the limited installation space of the high-altitude hub. Simultaneously, when no media is input into the media conveying channel 11 along the media conveying direction, the self-locking spraying mechanism 8 automatically seals the channel, preventing external dust and other impurities from clogging it when the device is not in use. When media is input into the media conveying channel 11 along the media conveying direction, positive pressure first pushes open the baffle plate 83 and compresses the first spring 86. At this time, any medium, such as gas or cleaning agent, can flow from the inlet of the media conveying channel 11 through the mounting groove 81, the overflow port, the overflow channel 89, and the guide section 84, and then disperse to the area around the outlet of the media conveying channel 11, achieving self-cleaning. Furthermore, the compression of the first spring 86 can be controlled by adjusting the input pressure, thereby adjusting the guide section 84. The distance between the guide section 84 and the part of the wheel hub to be cleaned can increase the airflow input pressure when blowing away sticky impurities. This allows the airflow to be closer to the wheel hub surface and effectively remove sticky impurities under the guidance of the flow channel 89 and the guide section 84. At the same time, during cleaning and maintenance, the cleaning agent and the medium conveying channel 11 can be heated by hot air. In cold climates, hot air can be preheated before the cleaning agent is pumped into the medium conveying channel 11 to prevent the internal components from freezing due to incomplete discharge of the cleaning agent and thus ensure stable operation of the device. Furthermore, designing the cleaning channel and the drying channel as the same medium conveying channel 11 can adapt to the cleaning process of cleaning first and then drying, ensuring that the inside of the medium conveying channel 11 is always dry after the cleaning and maintenance operation is completed.

[0025] Furthermore, such as Figure 1 , Figure 2 and Figure 5 As shown, a first coil 87 and a second coil 97 are provided on the outer periphery of the mounting plate 1; first connectors 88 are installed at equal intervals on the first coil 87, corresponding one-to-one with the number of media conveying channels 11, and the first connectors 88 penetrate and connect the inner cavity of the first coil 87 and the inlet of the media conveying channel 11; the first coil 87 is provided with an air injection port and a liquid injection port, the air injection port is connected to the first cavity 21 through a pipe, and the liquid injection port is connected to the output end of the cleaning unit 6; second connectors 98 are installed at equal intervals on the second coil 97, corresponding one-to-one with the number of dust suction channels 12, and the second connectors 98 penetrate and connect the inner cavity of the second coil 97 and the outlet of the dust suction channel 12; the second coil 97 is provided with an air extraction port, which is connected to the second cavity 22 through a pipe; control valve assemblies are installed at the air injection port, the liquid injection port, and the air extraction port. It achieves the separate delivery of gas and cleaning agent through a coil structure, ensuring uniform medium supply within multiple medium delivery channels 11. At the same time, the centralized arrangement of interfaces facilitates the reduction of pipeline installation and maintenance costs by utilizing the limited installation space within the hub. Furthermore, it works in conjunction with control valve groups, such as electronic valves, to precisely control medium delivery, preventing cross-flow of different media, such as gas and cleaning agent, in order to match the different cleaning modes mentioned above and improve the stability of cleaning operations.

[0026] Furthermore, such as Figure 2 , Figure 3 and Figure 4As shown, an anti-clogging mechanism 9 is provided inside the suction channel 12. The anti-clogging mechanism 9 includes a flow channel 91 that smoothly transitions from the center side of the suction channel 12 to the surrounding area, a fixing member 92, a connecting post 93, and a second spring 96. The fixing member 92 is located inside the suction channel 12 and is situated near its outlet. The fixing member 92 has a guide hole along the gas flow direction and several flow ports located around the guide hole. The connecting post 93 passes through the flow channel 91, and one end of the connecting post 93 passes through the guide hole and is fitted with a sealing plate. 94. The other end of the connecting post 93 extends to the side near the feed inlet of the suction channel 12 and is provided with a sealing plate 95; the second spring 96 is sleeved on the connecting post 93, and the two ends of the second spring 96 are respectively connected to the opposite surfaces of the fixing member 92 and the sealing plate 95; when the second spring 96 is in the initial state, the sealing plate 94 is tightly fitted with the fixing member 92 and completely covers all the flow ports, and the sealing plate 95 is tightly fitted with the feed inlet of the suction channel 12, which can prevent impurities inside the hub from entering prematurely before entering the suction operation. The inlet channel is designed to prevent contamination and blockage, ensuring the normal operation of the device. Specifically, the second spring 96 can press the sealing plate 95 against the inlet of the dust suction channel 12. Only when a negative pressure is generated on the outlet side of the dust suction channel 12 through the gas supply unit 4 can the sealing plate 94 be drawn towards the outlet side of the dust suction channel 12. Then, the sealing plate 95 is slid into the flow channel 91 through the connecting column 93, opening the inlet of the dust suction channel 12. At this time, under the turbulence of the external gas, it can... Dust and other impurities adhering to or accumulated on the surface of the wheel hub flow through the suction channel 12 and are then sent into the second chamber 22. Since the second chamber 22 and the first chamber 21 can filter particulate materials along the gas flow direction, a filter screen can be installed to block and intercept particulate materials into the second chamber 22. This facilitates the subsequent centralized cleaning of particulate impurities collected in the second chamber 22 via the ash discharge pipe 23. Alternatively, a vertical pipe can be installed to extend the ash discharge pipe 23 close to the ground, thus preventing the suction channel 12 from becoming blocked. It is worth noting that, to ensure continuous and stable dust collection, when the second spring 96 is in its maximum compressed state, the suction channel 12 is connected to its inlet and outlet.

[0027] Furthermore, such as Figure 5 As shown, 3-12 sets of cleaning channels are arranged circumferentially along the mounting plate 1, which can ensure that the cleaning channels are evenly distributed along the connection between the hub and the wind blade, so that the wind power generation components can achieve automatic cleaning operations in both operation and shutdown states; at the same time, the design dimensions between two adjacent sets of cleaning channels can be adjusted according to the hub size and the cleaning requirements of the operating scenario to accurately adapt to the usage requirements of special scenarios.

[0028] Furthermore, such as Figure 6As shown, the cleaning unit 6 includes a storage tank 61, a liquid level detection sensor 62, and a delivery pump 63. The storage tank 61 has a hollow internal structure. The liquid level detection sensor 62 is located at a preset liquid level line inside the storage tank 61 and is used to detect the liquid level information of the cleaning agent filled in the storage tank 61 in real time. The inlet of the delivery pump 63 is connected to the outlet of the storage tank 61 through a pipe, and the outlet of the delivery pump 63 is connected to the cleaning channel through a pipe. The precondition for starting the delivery pump 63 is set as follows: the liquid level information of the cleaning agent in the storage tank 61 meets the preset requirements to ensure the safe operation of the equipment, prevent the delivery pump 63 from being damaged due to long-term idling, and enable timely replenishment of cleaning agent through real-time detected liquid level information to ensure the normal operation of cleaning and maintenance work in the current or next maintenance cycle.

[0029] Furthermore, the gas supply unit 4 is configured as at least one of a fan or a gas distribution device; the gas distribution device includes a vacuum generator and a high-pressure gas storage tank, the suction port of the vacuum generator and the outlet of the high-pressure gas storage tank are respectively connected to the heating chamber 3 through pipelines; and control valve groups are installed at both the suction port of the vacuum generator and the outlet of the high-pressure gas storage tank. In this embodiment, as... Figure 2 As shown, the gas supply unit 4 preferentially uses a fan, and the positive and negative pressure input switching action is realized by controlling the fan rotor to rotate forward / reverse.

[0030] Furthermore, such as Figure 7 As shown, the electronic control system 7 includes a control module 71, a parameter setting module 72, and a power supply module 73. The control module 71 is electrically connected to the gas supply unit 4, heating component 5, cleaning unit 6, and control valve group. Based on preset control logic, the control module 71 controls the gas supply unit 4, heating component 5, cleaning unit 6, and control valve group to start the corresponding control modes. The parameter setting module 72 is electrically connected to the control module 71 and is used to input the operating parameters of each control mode to generate preset control logic, which is saved to the configuration file of the control module 71. The power supply module 73 is electrically connected to the control module 71, parameter setting module 72, gas supply unit 4, heating component 5, cleaning unit 6, and control valve group. The electronic control system 7 is connected to the user terminal 10 via a remote communication protocol. The user terminal 10 can start each control mode with one click on the operation interface based on the preset control logic to execute the corresponding task within any maintenance cycle, or independently control the start and stop of any control mode using the function selection key. The device can flexibly configure operating parameters according to the wheel hub pollution and environmental conditions to improve its versatility; at the same time, it can be remotely controlled through remote communication, completely eliminating dependence on on-site operations and further eliminating safety hazards of high-altitude operations, such as one-button start or independent control through the operation panel.

Claims

1. A cleaning and maintenance device for the interior of the hub of a wind turbine nacelle, characterized in that, include: The mounting plate (1) is located on one side of the wheel hub and has several sets of cleaning channels spaced apart along the end face near the wheel hub. The cleaning channels have at least one of a dust suction channel (12), a cleaning channel, and a drying channel. The gas distribution box (2) is provided with at least two interconnected first chambers (21) and second chambers (22) that can filter particulate materials along the gas flow direction; the first chamber (21) is connected to the drying channel at least, the second chamber (22) is connected to the dust suction channel (12), and the bottom of the second chamber (22) is provided with a dust discharge pipe (23); a heating chamber (3) and a gas supply unit (4) are arranged sequentially along the gas flow direction on the side of the first chamber (21) away from the second chamber (22). The gas supply unit (4) inputs positive pressure into the drying channel through the first chamber (21) to blow the hub, and inputs negative pressure into the dust suction channel (12) through the second chamber (22) to absorb the dust adhering to the surface of the hub, or inputs positive pressure into the dust discharge pipe (23) through the first chamber (21) and the second chamber (22) to discharge dust; A heating component (5) is disposed in the heating chamber (3) and is used to heat-treat the gas flowing through the heating chamber (3) to make it reach a preset value; The cleaning unit (6) has its output end connected to the cleaning channel, and is used to pump the cleaning agent through the cleaning channel into the part of the hub to be cleaned to soak and rinse the impurities adhering to its surface. The electrical control system (7) is connected to the gas supply unit (4), the heating component (5), the cleaning unit (6), and the control valve group. The control valve group is used at least to control the opening and closing of the first cavity (21) and the drying channel, and the opening and closing of the second cavity (22) and the dust suction channel (12) and / or the ash discharge pipe (23).

2. The cleaning and maintenance device for the interior of the hub of a wind turbine nacelle according to claim 1, characterized in that, The electronic control system (7) activates the corresponding control mode according to the preset control logic, the control mode including: Dust removal mode: Control the second cavity (22) to connect with the dust suction channel (12), and start the gas supply unit (4) to control it to input negative pressure into the dust suction channel (12) to absorb the dust adhering to the surface of the wheel hub; Cleaning mode: Start the cleaning unit (6) to pump the cleaning agent through the cleaning channel into the part of the wheel hub to be cleaned, and soak and rinse the impurities adhering to its surface; Drying mode: Control the heating component (5) to preheat the interior of the heating chamber (3). When the preheating temperature reaches the target value, control the first cavity (21) to connect with the drying channel, and start the gas supply unit (4) to input positive pressure into the drying channel to purge the hub. At the same time, monitor the current input gas temperature in the drying channel in real time and dynamically adjust the heating temperature of the heating component (5) so that the current input gas temperature in the drying channel is within the preset purging range. Ash removal mode: Control the second cavity (22) to connect with the ash removal pipeline (23), and start the gas supply unit (4) to control it to input positive pressure into the ash removal pipeline (23) for ash removal; The dust removal mode, the cleaning mode, and the drying mode operate independently; The ash removal mode can operate synchronously with the cleaning mode or the drying mode.

3. The cleaning and maintenance device for the interior of the hub of a wind turbine nacelle according to claim 1, characterized in that, The cleaning channel and the drying channel are configured as the same medium conveying channel (11), and a self-locking spraying mechanism (8) is provided in the medium conveying channel (11). The self-locking spraying mechanism (8) includes: An installation groove (81) is provided extending outwards from the center side of the medium conveying channel (11); A connecting rod (82) is inserted into the mounting groove (81). A baffle plate (83) is provided on the side of the connecting rod (82) near the feed port of the medium conveying channel (11). A guide part (84) is provided on the other end of the connecting rod (82) through the discharge port of the medium conveying channel (11). A flow passage (89) is formed by a clearance fit between the outer wall of the connecting rod (82) and the inner wall of the medium conveying channel (11). A guide (85) is provided on the connecting rod (82) and is slidably connected to the mounting groove (81). An overflow port is provided on the guide (85) along the medium flow direction. The first spring (86) is sleeved on the connecting rod (82), and the two ends of the first spring (86) are respectively connected to the inner wall opposite surfaces of the guide (85) and the baffle (83); When the first spring (86) is in its initial state, the baffle plate (83) is in close contact with the inlet of the medium conveying channel (11), and the guide part (84) is in close contact with the outlet of the medium conveying channel (11).

4. A cleaning and maintenance device for the interior of the hub of a wind turbine nacelle according to claim 3, characterized in that, The outer periphery of the mounting plate (1) is provided with a first coil (87) and a second coil (97). The first coil (87) is provided with first connectors (88) installed at equal intervals, corresponding one-to-one with the number of media conveying channels (11). The first connectors (88) pass through and connect the inner cavity of the first coil (87) and the inlet of the media conveying channel (11). The first coil (87) is provided with an air injection port and a liquid injection port. The air injection port is connected to the first cavity (21) through a pipe, and the liquid injection port is connected to the output end of the cleaning unit (6). The second coil (97) is provided with second connectors (98) that are equally spaced and correspond one-to-one with the number of the dust suction channels (12). The second connectors (98) penetrate and connect the inner cavity of the second coil (97) and the outlet of the dust suction channel (12). The second coil (97) is provided with an air extraction port, which is connected to the second cavity (22) through a pipe. Control valve assemblies are installed at the air injection port, the liquid injection port, and the air extraction port.

5. A cleaning and maintenance device for the interior of the hub of a wind turbine nacelle according to claim 1, characterized in that, The dust suction channel (12) is provided with an anti-clogging mechanism (9), which includes: A flow channel (91) is smoothly transitioned from the center side of the suction channel (12) to the surrounding area; The fixing member (92) is located in the dust suction channel (12) and near its outlet. The fixing member (92) has a guide hole along the gas flow direction and several flow ports located around the guide hole. A connecting column (93) is inserted into the flow channel (91). One end of the connecting column (93) is provided with a sealing plate (94) through the guide hole, and the other end of the connecting column (93) extends to the feed inlet side near the dust suction channel (12) and is provided with a blocking plate (95). The second spring (96) is sleeved on the connecting post (93), and the two ends of the second spring (96) are respectively connected to the opposite surfaces of the fixing member (92) and the sealing plate (95); When the second spring (96) is in its initial state, the sealing plate (94) is tightly attached to the fixing member (92) and completely covers all the flow ports, and the blocking plate (95) is tightly attached to the feed port of the dust suction channel (12).

6. A cleaning and maintenance device for the interior of the hub of a wind turbine nacelle according to claim 1, characterized in that, The cleaning channels are arranged in 3-12 groups at circumferential intervals along the mounting plate (1).

7. A cleaning and maintenance device for the interior of the hub of a wind turbine nacelle according to claim 1, characterized in that, The cleaning unit (6) includes: The storage container (61) has a hollow internal structure; A liquid level detection sensor (62) is installed at a preset liquid level line inside the storage container (61) to detect the liquid level information of the cleaning agent filled in the storage container (61) in real time. The inlet of the delivery pump (63) is connected to the outlet of the storage tank (61) through a pipe, and the outlet of the delivery pump (63) is connected to the cleaning channel through a pipe; the precondition for starting the delivery pump (63) is set as follows: the liquid level information of the cleaning agent in the storage tank (61) meets the preset requirements.

8. A cleaning and maintenance device for the interior of the hub of a wind turbine nacelle according to claim 1, characterized in that, The gas supply unit (4) is configured as at least one of a fan or a gas distribution device; The gas distribution equipment includes a vacuum generator and a high-pressure gas storage tank. The air inlet of the vacuum generator and the air outlet of the high-pressure gas storage tank are respectively connected to the heating chamber (3) through pipelines. Control valve groups are installed at the air inlet of the vacuum generator and the air outlet of the high-pressure gas storage tank.

9. A cleaning and maintenance device for the interior of the hub of a wind turbine nacelle according to claim 1, characterized in that, The electronic control system (7) includes: The control module (71) is electrically connected to the gas supply unit (4), the heating component (5), the cleaning unit (6), and the control valve group. The control module (71) controls the gas supply unit (4), the heating component (5), the cleaning unit (6), and the control valve group to start the corresponding control mode based on the preset control logic. The parameter setting module (72) is electrically connected to the control module (71) and is used to input the operating parameters of each control mode to generate preset control logic and save it to the configuration file of the control module (71); The power supply module (73) is electrically connected to the control module (71), the parameter setting module (72), the gas supply unit (4), the heating component (5), the cleaning unit (6), and the control valve group.

10. A cleaning and maintenance device for the interior of the hub of a wind turbine nacelle according to claim 9, characterized in that, The electronic control system (7) is connected to the user terminal (10) via a remote communication protocol. The user terminal (10) can start each control mode with one click on the operation interface based on the preset control logic to execute the corresponding task within any maintenance cycle, or use the function selection key to independently control the start and stop of any control mode.

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