A wind turbine nacelle inner hub interior cleaning device

Abstract

This invention relates to the field of wind turbine cleaning technology, and more specifically, to a cleaning device for the interior of a wind turbine hub. The cleaning device further includes a cleaning execution system and a post-processing monitoring system. The cleaning execution system is mounted on a fixed sleeve, and a processing box is connected to the cleaning execution system. The processing box contains a first cavity and a second cavity, with the second cavity filled with a cleaning agent. A solenoid valve is installed between the second cavity and the cleaning execution system. The post-processing monitoring system is mounted on the processing box and connected to the cleaning execution system. Compared to the traditional method of manual cleaning by entering the hub from a height, this device can achieve automatic and regular cleaning, reducing labor input. It also utilizes energy conversion principles to thoroughly clean the interior of the hub without any blind spots.

Description

Technical Field

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

[0002] Wind power generation is the most technologically mature power generation method in the development of new energy sources today. The rotor is the power component of the wind turbine, which consists of two parts: the hub and the blades. It is transported to the construction site separately by special vehicles for installation.

[0003] Due to the complex air environment at high altitudes, which contains a large amount of dust, a significant amount of dust accumulates on the inner side of the wheel hub during its long-term rotation. Therefore, it is necessary for staff to clean the inside of the wheel hub regularly. Each time the wheel hub is cleaned, the wind turbine needs to be shut down, and the staff needs to work at height, which poses certain safety hazards and is time-consuming. The wind turbine shutdown also causes economic losses. Therefore, there is an urgent need for a cleaning device that can automatically clean the inside of the wheel hub. Summary of the Invention

[0004] The purpose of this invention is to provide a cleaning device for the interior of the hub of a wind turbine nacelle, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A cleaning device for the interior of a wind turbine nacelle hub includes a connecting sleeve, a fixing sleeve, a connecting frame, and a processing box. The connecting sleeve is mounted on the column of the wind turbine, and the fixing sleeve is mounted inside the nacelle hub of the wind turbine. The fixing sleeve has a guide rail formed thereon that slides with the connecting sleeve. The connecting frame is mounted on the fixing sleeve, and the processing box is mounted on the connecting frame. The cleaning device also includes a cleaning execution system and a post-processing monitoring system. The cleaning execution system is mounted on the fixing sleeve and is used to perform vacuuming and cleaning agent spraying inside the nacelle hub of the wind turbine. The processing box is connected to the cleaning execution system and has a first cavity and a second cavity. The second cavity is filled with cleaning agent, and a solenoid valve is installed between the second cavity and the cleaning execution system. The post-processing monitoring system is mounted on the processing box and connected to the cleaning execution system, and is used to monitor the working time of the cleaning execution system and trigger the opening and closing of the solenoid valve and the output of cleaning agent.

[0007] The cleaning execution system includes a guide box, an inner sealing ring plate, a dual-channel pipe, and an execution component. The guide box is mounted on a fixed sleeve and located inside the wind turbine's nacelle. The fixed sleeve and the guide box are concentrically arranged. The guide box has an upper cavity and a lower cavity formed inside. The sealing ring plate is movably mounted inside the guide box. The dual-channel pipe is located on one side of the guide box, connecting the upper cavity and the first cavity, and connecting the lower cavity and the second cavity. The execution component is located between the guide box and the fixed sleeve and is used to perform vacuuming and cleaning agent output.

[0008] A further technical solution of this application: The execution component includes a first movable seat, a second movable seat, a magnetic block, a dust suction module, and a liquid spraying module. The first and second movable seats are arranged opposite to each other and are both mounted on a fixed sleeve. The first and second movable seats are slidably engaged with a guide rail. Magnetic blocks that attract each other are provided on the first and second movable seats and the connecting sleeve. The dust suction module is mounted on the first movable seat and communicates with the upper cavity through an inner sealing ring plate. It is used to suck dust from the chamber into the upper cavity and ultimately into the first cavity. The liquid spraying module is mounted on the second movable seat and communicates with the lower cavity through an inner sealing ring plate. The liquid spraying module is used to perform the spraying of cleaning agent.

[0009] A further technical solution of this application: The dust collection module includes a fixed base, a mounting platform, a dust collection seat, a plurality of dust collection heads, and a dust collection unit. The fixed base is disposed on a first movable base. The mounting platform is movably disposed on a guide box and connected to the fixed base. The dust collection seat is disposed on the mounting platform. The plurality of dust collection heads are disposed on the dust collection seat. The dust collection unit is disposed between the fixed base and the fixed sleeve and communicates the upper cavity and the dust collection heads. When the fixed sleeve rotates relative to the first movable base, it controls the dust collection unit to work and sucks the dust in the chamber into the first cavity.

[0010] A further technical solution of this application: The vacuuming unit includes a vacuuming pipe, a piston rod, a screw sleeve, a third gear, and a gear ring. The gear ring is mounted on a fixed sleeve. The vacuuming pipe is mounted on a fixed base and has an input hole and an output hole. The input hole communicates with the vacuuming head, and the output hole communicates with the upper cavity. A one-way valve is provided in both the input hole and the output hole. The third gear is movably mounted on a first movable base and meshes with the gear ring. A reciprocating screw is movably mounted between the first movable base and the vacuuming pipe. The piston rod is movably mounted inside the vacuuming pipe and threadedly engaged with the reciprocating screw. The reciprocating screw and the third gear are coaxially connected.

[0011] A further technical solution of this application: a plurality of the vacuum heads and the vacuum seat are hinged together and a torsion spring is provided at the hinge. An angle adjustment unit is provided between the vacuum seat and the fixed sleeve. The angle adjustment unit is connected to the vacuum head and is used to adjust the angle between the vacuum head and the vacuum seat.

[0012] A further technical solution of this application: The angle adjustment unit includes a second gear, a rack, a roller, and several protrusions. The several protrusions are arranged around the outer wall of the guide box. The second gear is movably mounted on the dust collection seat and coaxially connected to the dust collection head. The rack is movably mounted on the mounting platform and the two are elastically connected. The rack and the second gear mesh. The roller is movably mounted on the rack and slides with the outer wall of the guide box. The protrusions are located on the movement path of the roller.

[0013] A further technical solution of this application: the spray module includes a connector, a spray rod, a housing, a rotating shaft, and a first gear. The rotating shaft is movably mounted on a second movable seat. The housing is fitted onto the outer wall of the rotating shaft and communicates with the lower cavity. The first gear is movably mounted on the second movable seat and coaxially connected to the rotating shaft. The connector is located at the end of the rotating shaft away from the second movable seat. The spray rod is located on the connector and communicates with the housing. The first gear meshes with a gear ring.

[0014] A further technical solution of this application: An exhaust box is provided on the processing box, and a barrier mesh is provided inside the exhaust box. The post-processing monitoring system includes fan blades, a swing arm, a pull arm, a lifting block, a stepper motor, a drive screw, an extrusion plate, a moving rod, and a monitoring component. The extrusion plate is movably disposed in the second cavity. The moving rod is movably disposed inside the processing box and connected at one end to the extrusion plate. The drive screw is movably disposed between the processing box and the connecting frame. The stepper motor is disposed on the connecting frame and its output end is connected to the drive screw. The drive screw and the moving rod are threadedly engaged. The fan blades are movably disposed inside the exhaust box. The swing arm is movably disposed on the outer wall of the exhaust box and coaxially connected to the fan blades. The lifting block is movably disposed on the exhaust box and movably connected to the swing arm via the pull arm. The monitoring component is disposed on the processing box and connected to the lifting block, used to monitor the number of reciprocating movements of the lifting block and control the opening and closing of the solenoid valve and the stepper motor.

[0015] A further technical solution of this application: The monitoring component includes a conductive block, a detection strip, a resistance strip, a pusher, a monitoring base, a first slot, and a limiting member. The monitoring base is mounted on the processing box. The detection strip is movably mounted on the monitoring base. The resistance strip is mounted on the detection strip. The conductive block is mounted on the monitoring base and slides in cooperation with the resistance strip. The number of first slots is several and they are equidistantly arranged on the detection strip. One end of the pusher is hinged to the lifting block, and a torsion spring is provided at the hinge. The pusher cooperates with the first slot. The limiting member is located between the detection strip and the monitoring base to restrict the unidirectional movement of the detection strip.

[0016] A further technical solution of this application: the limiting component includes a second slot, an electric telescopic rod, and a telescopic locking strip. The number of second slots is several and they are equidistantly arranged on one side of the detection strip. The telescopic locking strip is movably arranged on the monitoring base and cooperates with the second slot. The electric telescopic rod is arranged on the monitoring base and its movable end is connected to the telescopic locking strip.

[0017] Compared with the prior art, the technical solution provided by the embodiments of the present invention has the following beneficial effects:

[0018] This invention, through the installation of a cleaning execution system and a post-processing monitoring system, directly inside the hub of a wind turbine, utilizes the rotation of the hub relative to the column as power to control the operation of these systems. A mechanical linkage structure allows the cleaning execution system's suction module to first draw dust from the surfaces of various components inside the hub into a treatment box. When the post-processing monitoring system detects that the suction time has reached the expected value, it automatically controls the output of cleaning agent, spraying it from the spray module. This achieves spray cleaning of the hub's interior. Compared to traditional manual cleaning methods involving high-altitude access to the hub, this device enables automatic, periodic cleaning, reducing labor input. Furthermore, it leverages energy conversion principles to thoroughly clean the hub's interior without any blind spots. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the internal cleaning device for the wind turbine hub in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the cleaning execution system in the cleaning device inside the hub of the wind turbine nacelle in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the actuation component in the cleaning device inside the hub of the wind turbine nacelle in an embodiment of the present invention;

[0022] Figure 4This is an exploded view of the connecting sleeve, guide box, and inner sealing ring plate in the internal cleaning device of the wind turbine nacelle hub in an embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of the dust collection module in the cleaning device inside the hub of the wind turbine nacelle in an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the post-treatment monitoring system in the cleaning device inside the hub of the wind turbine nacelle in an embodiment of the present invention;

[0025] Figure 7 This is a partial cross-sectional view of the treatment box in the cleaning device inside the hub of the wind turbine nacelle in an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the monitoring component in the cleaning device inside the hub of the wind turbine nacelle in an embodiment of the present invention.

[0027] Explanation of the labels in the diagram:

[0028] 1-Connecting sleeve, 2-Fixing sleeve, 3-Magnetic block, 4-Guide box, 5-Connecting frame, 6-First moving seat, 7-Guide rail, 8-Second moving seat, 9-Fixing seat, 10-Mounting platform, 11-Dust suction pipe, 12-Inner sealing ring plate, 13-Protrusion, 14-Dust suction seat, 15-Casing, 16-Spray bar, 17-Rotating shaft, 18-First gear, 19-Double-through pipe, 20-Connector, 21-Upper cavity, 22-Lower cavity, 23-Roller, 24-Rack, 25-Dust suction head, 26-Second gear, 28-Piston rod 29-Screw sleeve, 30-Third gear, 31-Gear ring, 32-Stepper motor, 33-Processing box, 34-Detection strip, 35-First slot, 36-Second slot, 37-Lifting block, 38-Exhaust box, 39-Pull arm, 40-Electric telescopic rod, 41-Extrusion plate, 42-Second cavity, 43-Solenoid valve, 44-First cavity, 45-Monitoring seat, 46-Telescopic clip, 47-Resistor strip, 48-Conductive block, 49-Push bar, 50-Swing arm, 51-Fan blade, 52-Moving rod, 53-Drive screw. Detailed Implementation

[0029] 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. The present invention will be further described below with reference to the embodiments.

[0030] Please see Figures 1-8In one embodiment of this application, a cleaning device for the interior of a wind turbine nacelle hub includes a connecting sleeve 1, a fixing sleeve 2, a connecting frame 5, and a processing box 33. The connecting sleeve 1 is disposed on the column of the wind turbine, and the fixing sleeve 2 is disposed inside the nacelle hub of the wind turbine. A guide rail 7 is formed on the fixing sleeve 2 to slide and engage with the connecting sleeve 1. The connecting frame 5 is disposed on the fixing sleeve 2, and the processing box 33 is disposed on the connecting frame 5. The cleaning device further includes a cleaning execution system and a post-processing monitoring system. The cleaning execution system is configured with... The fixed sleeve 2 is used for vacuuming and spraying cleaning agent inside the nacelle hub of the wind turbine. The processing box 33 is connected to the cleaning execution system. The processing box 33 is provided with a first cavity 44 and a second cavity 42. The second cavity 42 is filled with cleaning agent. A solenoid valve 43 is provided between the second cavity 42 and the cleaning execution system. The post-processing monitoring system is set on the processing box 33 and connected to the cleaning execution system. It is used to monitor the working time of the cleaning execution system and trigger the opening and closing of the solenoid valve 43 and the output of cleaning agent.

[0031] The cleaning execution system includes a guide box 4, an inner sealing ring plate 12, a dual-channel pipe 19, and an execution component. The guide box 4 is mounted on a fixed sleeve 2 and located inside the wind turbine's nacelle. The fixed sleeve 2 and the guide box 4 are concentrically arranged. An upper cavity 21 and a lower cavity 22 are formed inside the guide box 4. The sealing ring plate is movably mounted inside the guide box 4. The dual-channel pipe 19 is located on one side of the guide box 4. The dual-channel pipe 19 connects the upper cavity 21 and the first cavity 44, and connects the lower cavity 22 and the second cavity 42. The execution component is located between the guide box 4 and the fixed sleeve 2 and is used to perform vacuuming and cleaning agent output.

[0032] In this embodiment, the execution components include a first movable seat 6, a second movable seat 8, a magnetic block 3, a dust suction module, and a liquid spraying module. The first movable seat 6 and the second movable seat 8 are arranged opposite to each other and are both mounted on the fixed sleeve 2. The first movable seat 6 and the second movable seat 8 are both slidably engaged with the guide rail 7. The first movable seat 6, the second movable seat 8, and the connecting sleeve 1 are all provided with magnetic blocks 3 that attract each other when they meet. The dust suction module is mounted on the first movable seat 6 and communicates with the upper cavity 21 through the inner sealing ring plate 12. It is used to suck dust from the chamber into the upper cavity 21 and finally into the first cavity 44. The liquid spraying module is mounted on the second movable seat 8 and communicates with the lower cavity 22 through the inner sealing ring plate 12. The liquid spraying module is used to perform the spraying of cleaning agent.

[0033] In practical applications, by fixing the connecting sleeve 1 to the column of the wind turbine and connecting the fixing sleeve 2 to the hub inside the wind turbine, the hub rotates relative to the column during the wind power generation process. Under the attraction between the magnetic blocks 3, the positions of the first moving seat 6 and the second moving seat 8 remain fixed. The fixing seat 9 and the guide box 4 rotate relative to the first moving seat 6 and the second moving seat 8. During this process, the dust collection module can be driven to work. The dust collection module can suck the dust from various positions inside the hub into the upper cavity 21 and finally input it into the first cavity 44. At the same time, the post-processing monitoring system monitors the actual working time of the dust collection module in real time. When the working time of the dust collection module reaches the expected value, the post-processing monitoring system can control the solenoid valve 43 to open, so that the second cavity 42 and the lower cavity 22 are connected. At the same time, the post-processing monitoring system can input the cleaning agent in the second cavity 42 into the spray module, so that the cleaning agent is sprayed out in the form of mist to clean the surface of the parts in various positions of the hub, eliminating the need for manual periodic cleaning by the staff.

[0034] Please see Figures 1-8 In another preferred embodiment of this application, the dust collection module includes a fixed base 9, a mounting platform 10, a dust collection seat 14, a plurality of dust collection heads 25, and a dust collection unit. The fixed base 9 is disposed on the first movable base 6. The mounting platform 10 is movably disposed on the guide box 4 and connected to the fixed base 9. The dust collection seat 14 is disposed on the mounting platform 10. The plurality of dust collection heads 25 are disposed on the dust collection seat 14. The dust collection unit is disposed between the fixed base 9 and the fixed sleeve 2 and connects the upper cavity 21 and the dust collection heads 25. When the fixed sleeve 2 rotates relative to the first movable base 6, it controls the dust collection unit to work and sucks the dust in the chamber into the first cavity 44.

[0035] In one specific embodiment, the vacuuming unit includes a vacuum pipe 11, a piston rod 28, a screw sleeve 29, a third gear 30, and a gear ring 31. The gear ring 31 is mounted on the fixed sleeve 2. The vacuum pipe 11 is mounted on the fixed base 9 and has an input hole and an output hole. The input hole communicates with the vacuum head 25, and the output hole communicates with the upper cavity 21. Both the input hole and the output hole are equipped with one-way valves. The third gear 30 is movably mounted on the first movable base 6 and meshes with the gear ring 31. A reciprocating screw is movably mounted between the first movable base 6 and the vacuum pipe 11. The piston rod 28 is movably mounted inside the vacuum pipe 11 and threadedly engaged with the reciprocating screw. The reciprocating screw and the third gear 30 are coaxially connected.

[0036] In another specific embodiment, several of the vacuum heads 25 and the vacuum seat 14 are hinged together and a torsion spring is provided at the hinge. An angle adjustment unit is provided between the vacuum seat 14 and the fixing sleeve 2. The angle adjustment unit is connected to the vacuum head 25 and is used to adjust the angle between the vacuum head 25 and the vacuum seat 14.

[0037] It should be further explained that the angle adjustment unit includes a second gear 26, a rack 24, a roller 23, and several protrusions 13. The several protrusions 13 are arranged around the outer wall of the guide box 4. The second gear 26 is movably mounted on the dust collection seat 14 and coaxially connected with the dust collection head 25. The rack 24 is movably mounted on the mounting platform 10 and the two are elastically connected. The rack 24 and the second gear 26 mesh with each other. The roller 23 is movably mounted on the rack 24 and slides with the outer wall of the guide box 4. The protrusions 13 are located on the movement path of the roller 23.

[0038] When the hub rotates relative to the column, the fixed seat 9 rotates relative to the connecting sleeve 1. During this process, the gear ring 31 rotates relative to the third gear 30. Under the meshing action between the third gear 30 and the gear ring 31, the third gear 30 and the reciprocating screw can be driven to rotate. When the reciprocating screw rotates, it can drive the piston rod 28 to reciprocate. This allows the dust from various locations inside the hub to be sucked into the suction pipe 11 along the suction head 25 and the suction seat 14, and finally fed into the first cavity 44 along the upper cavity 21. During this process, the roller 23 can meet the protrusions 13 at different locations one after another, which allows the rack 24 to reciprocate relative to the suction head 25. Under the meshing action between the rack 24 and the second gear 26, the second gear 26 is driven to rotate repeatedly, which in turn drives the suction head 25 to swing continuously relative to the suction seat 14. This further improves the dust suction work at various locations inside the hub and prevents dust from adhering to the surface of the equipment inside the hub and affecting the normal operation of the equipment.

[0039] Please see Figures 1-8 In another preferred embodiment of this application, the spray module includes a connector 20, a spray rod 16, a housing 15, a rotating shaft 17, and a first gear 18. The rotating shaft 17 is movably mounted on the second movable seat 8. The housing 15 is fitted onto the outer wall of the rotating shaft 17 and communicates with the lower cavity 22. The first gear 18 is movably mounted on the second movable seat 8 and coaxially connected with the rotating shaft 17. The connector 20 is located at the end of the rotating shaft 17 away from the second movable seat 8. The spray rod 16 is mounted on the connector 20 and communicates with the housing 15. The first gear 18 meshes with the gear ring 31.

[0040] In practical applications, when the hub of the wind turbine rotates relative to the column, the gear ring 31 rotates relative to the first gear 18. Under the meshing action between the gear ring 31 and the first gear 18, the first gear 18, the rotating shaft 17, and the spray bar 16 can be driven to rotate, thereby controlling the rotation of the spray bar 16. At the same time, when the post-treatment monitoring system detects that the dust collection time has reached the expected value, the post-treatment monitoring system can open the solenoid valve 43, and control the cleaning agent in the second chamber to enter the housing 15 and finally input it into the spray bar 16 and finally spray it onto various positions inside the hub, thereby effectively cleaning the inside of the hub after dust collection.

[0041] Please see Figures 1-8 In another preferred embodiment of this application, the processing box 33 is provided with an exhaust box 38, and the exhaust box 38 is provided with a barrier net. The post-processing monitoring system includes a fan blade 51, a swing arm 50, a pull arm 39, a lifting block 37, a stepper motor 32, a drive screw 53, an extrusion plate 41, a moving rod 52, and a monitoring component. The extrusion plate 41 is movably disposed in the second cavity. The moving rod 52 is movably disposed in the processing box 33 and one end is connected to the extrusion plate 41. The drive screw 53 is movably disposed between the processing box 33 and the connecting frame 5. The machine 32 is mounted on the connecting frame 5 and its output end is connected to the drive screw 53. The drive screw 53 and the moving rod 52 are threaded together. The fan blade 51 is movably mounted inside the exhaust box 38. The swing arm 50 is movably mounted on the outer wall of the exhaust box 38 and is coaxially connected to the fan blade 51. The lifting block 37 is movably mounted on the exhaust box 38 and is movably connected to the swing arm 50 through the pull arm 39. The monitoring component is mounted on the processing box 33 and connected to the lifting block 37. It is used to monitor the number of reciprocating movements of the lifting block 37 and control the opening and closing of the solenoid valve 43 and the stepper motor 32.

[0042] In one specific embodiment, the monitoring component includes a conductive block 48, a detection strip 34, a resistance strip 47, a pusher 49, a monitoring base 45, a first slot 35, and a limiting member. The monitoring base 45 is mounted on the processing box 33. The detection strip 34 is movably mounted on the monitoring base 45. The resistance strip 47 is mounted on the detection strip 34. The conductive block 48 is mounted on the monitoring base 45 and slides with the resistance strip 47. There are several first slots 35, which are equidistantly arranged on the detection strip 34. One end of the pusher 49 is hinged to the lifting block 37, and a torsion spring is provided at the hinge. The pusher 49 cooperates with the first slot 35. The limiting member is located between the detection strip 34 and the monitoring base 45 to restrict the unidirectional movement of the detection strip 34.

[0043] In a non-limiting sense, this embodiment is not limited to the cooperation of the resistor strip 47 and the conductive block 48 described above to monitor the position of the detection strip 34. Infrared ranging sensors or laser ranging sensors can also be used instead, which will not be listed here.

[0044] In another specific embodiment, the limiting member includes a second slot 36, an electric telescopic rod 40, and a telescopic locking strip 46. The number of second slots 36 is several and they are equidistantly arranged on one side of the detection strip 34. The telescopic locking strip 46 is movably arranged on the monitoring base 45 and cooperates with the second slot 36. The electric telescopic rod 40 is arranged on the monitoring base 45 and its movable end is connected to the telescopic locking strip 46.

[0045] After the dust is drawn into the first cavity 44 of the dust intake and treatment box 33, air can be discharged from the exhaust box 38, leaving the dust inside the first cavity 44. During this process, the air comes into contact with the fan blade 51, causing the fan blade 51 to rotate continuously, which in turn causes the swing arm 50 to rotate. Under the action of the swing arm 50 and the pull arm 39, the lifting block 37 can be driven to reciprocate vertically. Under the contact action of the first slot 35 and the push bar 49, the detection bar 34 can be driven to move along the monitoring base 45, thereby causing the conductive block 48 and the conductive bar to contact at different positions. When the detection bar 34 moves to the set position (i.e., when the resistance value of the connected circuit reaches the expected position), the electromagnetic circuit can be controlled. After being energized and opened for a period of time, the valve 43 and stepper motor 32 automatically close. When the stepper motor 32 is energized and rotates, it can drive the drive screw 53 to rotate. Then, under the threaded engagement between the drive screw 53 and the moving rod 52, the moving rod 52 and the extrusion plate 41 move along the second cavity 42, thereby inputting the cleaning agent in the second cavity 42 into the lower cavity 22 and finally into the spray rod 16 for spraying, realizing the spray cleaning work inside the hub of the wind turbine nacelle. Then, the electric telescopic rod 40 is energized and retracted, driving the telescopic clip 46 to disengage from the second clip 36, thereby resetting the positions of the detection strip 34 and the resistance strip 47 under the action of elastic restoring force.

[0046] How this application works:

[0047] By fixing the connecting sleeve 1 to the column of the wind turbine and connecting the fixing sleeve 2 to the hub inside the wind turbine nacelle, during the rotation of the hub relative to the column caused by the wind turbine generating wind power, the positions of the first moving seat 6 and the second moving seat 8 remain fixed under the gravitational force between the magnetic blocks 3. The fixing seat 9 and the guide box 4 rotate relative to the first moving seat 6 and the second moving seat 8. During this process, the gear ring 31 can rotate relative to the third gear 30. Under the meshing action between the third gear 30 and the gear ring 31, the third gear 30 and the reciprocating screw can be driven to rotate. When the reciprocating screw rotates, it can drive the piston rod 28 to reciprocate. This allows the dust from various locations inside the hub to be sucked into the suction pipe 11 via the suction head 25 and suction seat 14, and finally fed into the first cavity 44 via the upper cavity 21. During this process, the roller 23 can successively meet the protrusions 13 at different positions, which causes the rack 24 to reciprocate relative to the suction head 25. Under the meshing action between the rack 24 and the second gear 26, the second gear 26 is driven to rotate repeatedly, which in turn causes the suction head 25 to swing continuously relative to the suction seat 14, further improving the dust suction work of various locations inside the hub and preventing dust from adhering to the surface of the equipment inside the hub and affecting the normal operation of the equipment. After the dust is drawn into the first cavity 44 of the dust treatment box 33, air can be discharged from the exhaust box 38, leaving the dust in the first cavity 44. During this process, the air comes into contact with the fan blade 51, causing the fan blade 51 to rotate continuously, which in turn causes the swing arm 50 to rotate. Under the action of the swing arm 50 and the pull arm 39, the lifting block 37 can be driven to reciprocate vertically. Under the action of the first slot 35 and the push bar 49, the detection bar 34 can be driven to move along the monitoring seat 45, thus causing the conductive block 48 and the conductive bar to contact at different positions. When the detection bar 34 moves to the set position (i.e., when the resistance value of the connected circuit reaches the expected position), the solenoid valve 43 and the stepper motor 32 can be energized and opened for a period of time before automatically closing. When the stepper motor 32 is energized and rotates, it can drive the drive screw 53 to rotate, thus driving the solenoid valve 43 to rotate. Under the threaded engagement between the lead screw 53 and the moving rod 52, the moving rod 52 and the extrusion plate 41 are driven to move along the second cavity 42, thereby inputting the cleaning agent in the second cavity 42 into the lower cavity 22 and finally into the spray rod 16 for spraying. At this time, the gear ring 31 rotates relative to the first gear 18. Under the meshing action between the gear ring 31 and the first gear 18, the first gear 18, the rotating shaft 17 and the spray rod 16 can be driven to rotate, thereby controlling the rotation of the spray rod 16. At the same time, when the post-processing monitoring system detects that the vacuuming time has reached the expected value, the post-processing monitoring system can open the solenoid valve 43, and control the cleaning agent in the second cavity to enter the housing 15 and finally input into the spray rod 16 and finally spray it onto various positions inside the wheel hub, thereby effectively cleaning the inside of the wheel hub after vacuuming.Then the electric telescopic rod 40 is energized and retracts, causing the telescopic locking strip 46 to disengage from the second locking groove 36, thereby resetting the positions of the detection strip 34 and the resistance strip 47 under the action of elastic restoring force.

[0048] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cleaning device for the interior of a wind turbine nacelle hub, comprising a connecting sleeve, a fixing sleeve, a connecting frame, and a processing box, wherein the connecting sleeve is disposed on the column of the wind turbine, the fixing sleeve is disposed inside the nacelle hub of the wind turbine, the fixing sleeve has a guide rail formed thereon that slides with the connecting sleeve, the connecting frame is disposed on the fixing sleeve, and the processing box is disposed on the connecting frame, characterized in that, The cleaning device also includes a cleaning execution system and a post-processing monitoring system. The cleaning execution system is installed on a fixed sleeve and is used to perform dust suction and cleaning agent spraying inside the nacelle hub of the wind turbine. The processing box is connected to the cleaning execution system. The processing box is provided with a first cavity and a second cavity. The second cavity is filled with cleaning agent. A solenoid valve is installed between the second cavity and the cleaning execution system. The post-processing monitoring system is installed on the processing box and connected to the cleaning execution system. It is used to monitor the working time of the cleaning execution system and trigger the opening and closing of the solenoid valve and the output of cleaning agent. The cleaning execution system includes a guide box, an inner sealing ring plate, a dual-channel pipe, and an execution component. The guide box is mounted on a fixed sleeve and located inside the wind turbine's nacelle. The fixed sleeve and the guide box are concentrically arranged. The guide box has an upper cavity and a lower cavity formed inside. The sealing ring plate is movably mounted inside the guide box. The dual-channel pipe is located on one side of the guide box, connecting the upper cavity and the first cavity, and connecting the lower cavity and the second cavity. The execution component is located between the guide box and the fixed sleeve and is used to perform vacuuming and cleaning agent output. The execution components include a first movable seat, a second movable seat, a magnetic block, a dust suction module, and a liquid spraying module. The first and second movable seats are arranged opposite to each other and are both mounted on a fixed sleeve. Both the first and second movable seats slide with a guide rail. The first and second movable seats, as well as the connecting sleeve, are all equipped with magnetic blocks that attract each other when they meet. The dust suction module is mounted on the first movable seat and is connected to the upper cavity through an inner sealing ring plate. It is used to suck dust from the chamber into the upper cavity and finally into the first cavity. The liquid spraying module is mounted on the second movable seat and is connected to the lower cavity through an inner sealing ring plate. The liquid spraying module is used to perform the spraying of cleaning agent. The vacuuming module includes a fixed base, a mounting platform, a vacuuming seat, several vacuuming heads, and a vacuuming unit. The fixed base is mounted on a first movable base. The mounting platform is movably mounted on a guide box and connected to the fixed base. The vacuuming seat is mounted on the mounting platform. Several vacuuming heads are mounted on the vacuuming seat. The vacuuming unit is positioned between the fixed base and the fixed sleeve, connecting the upper cavity and the vacuuming heads. The vacuuming unit includes a vacuuming pipe, a piston rod, a screw sleeve, a third gear, and a gear ring. The gear ring is mounted on the fixed sleeve. The vacuuming pipe is mounted on the fixed base and has an input hole and an output hole. The input hole connects to the vacuuming heads, and the output hole connects to the upper cavity. Both the input hole and the output hole are equipped with one-way valves. The third gear is movably mounted on the first movable base and meshes with the gear ring. A reciprocating screw is movably mounted between the first movable base and the vacuuming pipe. The piston rod is movably mounted inside the vacuuming pipe and threadedly engages with the reciprocating screw. The reciprocating screw and the third gear are coaxially connected.

2. The cleaning device for the interior of the wind turbine nacelle and hub according to claim 1, characterized in that, Several of the vacuum heads and the vacuum base are hinged together, and a torsion spring is provided at the hinge. An angle adjustment unit is provided between the vacuum base and the fixed sleeve. The angle adjustment unit is connected to the vacuum head and is used to adjust the angle between the vacuum head and the vacuum base.

3. The cleaning device for the interior of the wind turbine nacelle and hub according to claim 2, characterized in that, The angle adjustment unit includes a second gear, a rack, a roller, and several protrusions. The protrusions are arranged around the outer wall of the guide box. The second gear is movably mounted on the dust collection seat and coaxially connected to the dust collection head. The rack is movably mounted on the mounting platform and elastically connected to the other two. The rack meshes with the second gear. The roller is movably mounted on the rack and slides against the outer wall of the guide box. The protrusions are located on the movement path of the roller.

4. The cleaning device for the interior of the wind turbine nacelle and hub according to claim 3, characterized in that, The spray module includes a connector, a spray bar, a housing, a rotating shaft, and a first gear. The rotating shaft is movably mounted on a second movable seat. The housing is fitted onto the outer wall of the rotating shaft and communicates with the lower cavity. The first gear is movably mounted on the second movable seat and coaxially connected to the rotating shaft. The connector is located at the end of the rotating shaft away from the second movable seat. The spray bar is located on the connector and communicates with the housing. The first gear meshes with a gear ring.

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