Device for cleaning an azimuth wheel of a wind turbine

Abstract

Device for cleaning an azimuth wheel of a wind turbine, comprising the following: a cabin unit (1) comprising a gondola (11), a toothed disc (12) articulated to the lower axis center of the gondola (11), a tower (13) fixedly arranged in the lower axis center of the toothed disc (12), and a drive element (14) arranged circumferentially in the lower axis center of the gondola (11); a cleaning component (2) arranged on the inner circumferential side of the toothed disc (12) and a mounting ring (21) fixedly arranged on the bottom of the gondola (11), a monitoring component (22) fixedly arranged on the lower circumferential side of the mounting ring (21), several sets of connecting components (24) fixedly arranged on the circumferential side of the mounting ring (21), and a cleaning component (25) articulated to the lower axis center of the connecting component (24).

Description

TECHNICAL AREA

[0001] The present invention relates to a technique for cleaning an azimuth wheel of a wind turbine, in particular a device for cleaning an azimuth wheel of a wind turbine. STATE OF THE ART

[0002] The operational reliability of the yaw tracking system in modern wind turbines, which serves as a core component for efficient wind energy capture, directly impacts the annual power generation efficiency and the turbine's lifespan. Current azimuth drives utilize a combined motor-attenuator drive, and the nacelle's azimuth adjustment is achieved by driving the slewing ring via a planetary gearbox. During operation, a bonding effect forms on the tooth surface of the azimuth bearing due to the interaction of metal particles, grease oxides, and environmental contaminants (e.g., sand, salt spray) generated by secondary gear wear.Field test data show that the carbon deposit on the tooth surface is positively correlated with the operating time of the system, which, if the adhesion thickness exceeds 0.3 mm, leads to an increase in yaw damping of 15% to 20%, which considerably reduces the yaw response rate and accelerates bearing wear.

[0003] In the current state of the art, the cleaning and maintenance of azimuth gears relies mainly on manual, regular cleaning, and there were technical bottlenecks: 1) Downtime causes power generation losses and there are high safety risks during high-volume operations; 2) Traditional crab tools have difficulty removing stubborn dirt from deeply embedded keyways. CONTENT OF THE PRESENT INVENTION

[0004] Therefore, the technical problems solved by the present invention are that the carbon deposits affect the yaw response rate and accelerate bearing wear.

[0005] The above-mentioned technical problems are solved by the following technical solutions, namely that the present invention provides a device for cleaning an azimuth wheel of a wind turbine, comprising a cabin unit having a nacelle, a toothed disc articulated to the lower axis center of the nacelle, a tower fixedly arranged in the lower axis center of the toothed disc, and a drive element arranged circumferentially in the lower axis center of the nacelle; a cleaning component located on the inner circumferential side of the toothed disc and a mounting ring fixed to the bottom of the gondola, a monitoring component fixed to the lower circumferential side of the mounting ring, several sets of connecting components fixed to the circumferential side of the mounting ring, and a cleaning component articulated to the lower axis center of the connecting component.

[0006] In a preferred embodiment of the device for cleaning an azimuth wheel of a wind turbine according to the present invention, the nacelle has a base plate which is arranged on the ground;

[0007] The drive element has several sets of motors that are held on the circumferential side of the base plate, and a drive wheel that is fixed in the center of the motor's axis.

[0008] In a preferred embodiment of the device for cleaning an azimuth wheel of a wind turbine according to the present invention, the monitoring component comprises a monitoring body which is fixedly attached to the bottom of the mounting ring and a stop wheel which is arranged at the end of the monitoring body.

[0009] In a preferred embodiment of the device for cleaning an azimuth wheel of a wind turbine according to the present invention, the connecting component has a stop ring which is simultaneously firmly attached to the mounting ring and the base plate, a lifting element which is slidably installed in the inner wall of the stop ring, and an adjusting rod which is screwed to the inner wall of the lifting element.

[0010] In a preferred embodiment of the device for cleaning an azimuth wheel of a wind turbine according to the present invention, the cleaning component comprises a coupling element that engages with one side of the drive wheel, a scraper element that is connected to one side of the coupling element, and a collecting element that is arranged on one side of the scraper element.

[0011] In a preferred embodiment of the device for cleaning an azimuth wheel of a wind turbine according to the present invention, the coupling element comprises a gear wheel which engages with one side of the drive wheel, an upper roller which engages with one side of the gear wheel, and a lower roller whose axis center is connected to the bottom of the upper roller.

[0012] In a preferred embodiment of the device for cleaning an azimuth wheel of a wind turbine according to the present invention, the upper roller is identical to the lower roller and arranged in a mirror image;

[0013] The surface where the upper roller is adjacent to the lower roller is provided with a cam surface and is firmly connected to a compression spring.

[0014] In a preferred embodiment of the device for cleaning an azimuth wheel of a wind turbine according to the present invention, the lifting element has a lifting rod which is screwed to the outside of the adjusting rod and a detent rod which is slidably mounted on the outside of the lifting rod;

[0015] A projecting support (M) extends from both sides of the rod of the lifting rod;

[0016] The locking bar is provided with a limiting groove (N).

[0017] In a preferred embodiment of the device for cleaning an azimuth wheel of a wind turbine according to the present invention, the scraper element comprises a sliding plate which is slidably connected to the base of the mounting ring, a rack which is slidably connected to one side of the sliding plate, a spring which is fixedly connected to one end of the rack, and a scraper which is fixedly connected to one end of the sliding plate.

[0018] In a preferred embodiment of the device for cleaning an azimuth wheel of a wind turbine according to the present invention, the collecting element has an arc plate which is fixedly arranged to the outer bottom of the lifting rod.

[0019] The present invention has the advantage that it significantly improves the cleaning efficiency and reliability of the azimuth wheel through the elastic coupling drive and the adaptive fit structure of the cleaning component. The coupling element of the cleaning component is designed with mirror-image offset tooth surfaces of the upper and lower rollers, whereby this arrangement, in conjunction with the elastic engagement mechanism of the compression spring, not only enables the gear wheel to be in rigid engagement with the drive wheel, but also allows the flexible drive chain to be driven by the preload force of the compression spring and the scraper element to be driven synchronously during wind direction tracking operation.The rack and sliding plate of the scraper element are elastically reset by the spring to ensure that the scraper always fits into the keyway and maintains clean contact, even if the tooth surface is inclined or oil accumulates, thus preventing insufficient clamping force or localized overloading. Furthermore, the arc-shaped deflection design of the arc plate fits into the keyway of the toothed disc, forming a closed waste collection chamber that effectively prevents waste from spreading during the cleaning process and improves collection efficiency. BRIEF DESCRIPTION OF THE DRAWING

[0020] To explain the technical solutions of the embodiments of the present invention more clearly, a simple description of the embodiments of the present invention is given below in conjunction with the accompanying drawings. It is obvious that the accompanying drawings in the following description relate only to some embodiments of the present invention and do not limit the present invention. They show: Fig. 1 is a schematic view of the internal structure of the gondola of the device for cleaning an azimuth wheel of a wind turbine of the present invention; Fig. Figure 2 is an exploded schematic view of the internal structure of the gondola of the device for cleaning an azimuth wheel of a wind turbine of the present invention; Fig. Figure 3 is a schematic view of the internal structure of the toothed disc of the device for cleaning an azimuth wheel of a wind turbine of the present invention; Fig. Figure 4 is a schematic view of the inner perspective, partially cut-away structure of the toothed disc from another angle of view of the present invention; Fig. Figure 5 is an enlarged view of the structure of the cleaning component at 2A of the present invention; Fig. Figure 6 is an enlarged view of the structure of the scraper element at 3B of the present invention; Fig. Figure 7 is an enlarged view of the structure of the coupling element at 3C of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the specific embodiments and the accompanying drawings in order to enable those skilled in the art to better understand the present invention.

[0022] The terms used in the present invention are those commonly used in the field, taking into account the functions of the present invention. However, they may vary according to the intentions of a person skilled in the art, the preparation of the invention, or new techniques in the field. Furthermore, the applicant may select certain terms, in which case their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the description are not to be understood as mere designations, but are based on the meaning of the terms and the general description of the present invention.

[0023] In relation to Fig. 1 to Fig. 7, the present invention provides a device for cleaning an azimuth wheel of a wind turbine, comprising a cabin unit 1, which has a nacelle 11, a toothed disc 12 which is articulated to the lower axis center of the nacelle 11, a tower 13 which is fixedly arranged in the lower axis center of the toothed disc 12, and a drive element 14 which is arranged circumferentially in the lower axis center of the nacelle 11; a cleaning component 2, which is arranged on the inner circumferential side of the toothed disc 12, and a mounting ring 21, which is fixedly arranged on the bottom of the gondola 11, a monitoring component 22, which is fixedly arranged on the lower circumferential side of the mounting ring 21, several sets of connecting components 24, which are fixedly arranged on the circumferential side of the mounting ring 21, and a cleaning component 25, which is articulated to the lower axis center of the connecting component 24.

[0024] In one embodiment of the present invention, the gondola 11 has a base plate 111 which is arranged on the ground;

[0025] The drive element 14 has several sets of motors 141 which are held on the circumferential side of the base plate 111, and a drive wheel 142 which is fixedly arranged in the center of the axis of the motor 141.

[0026] In the present embodiment, the base plate 111 projects from the base of the gondola 11, with the center of the base plate 111 creating a passageway that facilitates crew entry into the cabin 11. Four sets of axle holes are arranged on the circumferential side of the base plate 111, and the motor 141 is attached to the center of these axle holes at the apex of the base plate 111 by means of flange connectors. The output shaft of the motor 141 extends through the axle holes to engage with the toothed disc on the base of the base plate 111. The drive gear 142 is a spur gear with a module that matches that of the toothed disc 12 and is connected to the motor output shaft via a coupling. The coupling is equipped with a flexible cylindrical pin coupling and allows for angular compensation of ±1°.Via a planetary gear system, the four sets of motors 141 drive the base plate 111 to rotate in order to achieve the azimuth adjustment of the gondola.

[0027] Preferably, the motor 141 is a three-phase asynchronous motor with protection class IP55 and a power output of 1.5 kW to 3.7 kW, which is attached to the circumferential side of the base plate 111 via the screw set M16 × 80. The backlash of the drive wheel 142 with the toothed disc 12 is controlled to 0.2 mm to 0.3 mm, thus preventing jamming or excessive wear.

[0028] The toothed disc 12 has the structure of a toothed ring; the tooth surface is treated by a carburizing-quenching process, resulting in a surface hardness of ≥ HRC58, and the tooth profiles comply with ISO 6336. The center axis of the base of the toothed disc 12 is rigidly connected to the top of the tower 13 by the flanged connecting element 121, which includes an M36 × 300 bolt set and a sealing plate to prevent the ingress of rainwater. The M20 × 120 bolt set connects to the top of the tower 13, forming an integrated support frame.

[0029] Preferably, the mounting ring 21 is an annular frame structure formed by Q345B steel welding, and its outer diameter corresponds to the inner diameter of the toothed washer 12, which is fastened under the base plate 111 by the M20 × 120 screw set. The mounting ring 21 provides a mounting location for two sets of monitoring components 22 and two sets of cleaning components 25.

[0030] Preferably, a monitoring component 22 is fixedly flanged to the lower circumferential side of the mounting ring 21, which has an infrared sensor, a pressure sensor or an image camera, etc., for real-time monitoring of the cleaning status of the tooth surface of the tooth disc.

[0031] The connecting components 24 are evenly distributed around the circumference of the mounting ring in two sets, which interact with two sets of cleaning components 25 at the bottom. Each set consists of a threaded rod and a swivel joint or a telescopic linkage mechanism that enables the connecting components 24 to drive the cleaning components 25 downwards, thus establishing a drive connection between the cleaning components 25 and the drive wheels 142. The cleaning component 25 is articulated at the lower center axis of the connecting component 24 and has cleaning devices, such as a scraper, a collecting plate, and the like, to automatically clean the tooth surfaces according to a tooth shape.

[0032] Furthermore, the cleaning component 25 has a clutch effect that always engages one side of the drive wheel 142. The connecting component 24 drives the cleaning component 25 to lower, thus establishing a drive connection between the cleaning component 25 and the drive wheel 142. While the drive wheel 142 drives the gondola 11 to steer, the cleaning component 25 is also driven to function, so that the cleaning surface of the cleaning component 25 is in full contact with the tooth surface and the tooth surface is cleaned during steering.

[0033] Azimuth drive phase: When the wind turbine needs to adjust its direction, the control unit activates the corresponding drive element 14 according to the data from the wind direction sensor; the four sets of motors 141 simultaneously drive the drive wheel 142 to rotate the toothed disc in order to achieve the azimuth adjustment of the nacelle.

[0034] Cleaning phase: The monitoring component 22 continuously records information about the condition of the tooth surface during the operation of the wind direction tracking.If it is detected that the degree of contamination of the tooth surface exceeds the defined threshold, the monitoring operator, based on the acquired information, periodically drives the connecting component 24, whereby the connecting component 24 drives the cleaning component 25 downwards and extends it to bring the cleaning component 25 closer to the tooth surface; the motor 141 rotates the cleaning component 25 so that its cleaning surface is in full contact with the tooth surface; by contact with the tooth surface of the tooth disc 12 by the scraper, the bonding agent is removed from the keyway; during the cleaning process, the monitoring component provides synchronous feedback on the cleaning effect to ensure that the cleaning quality meets the standard; after cleaning is complete, the cleaning component is returned to its original position without affecting any azimuth movement.

[0035] In summary, the present device enables online cleaning of the azimuth wheel, which reduces downtime; yaw response speed and drive efficiency are improved, thereby increasing the operational stability of the system; the service life of critical components of the wind direction tracking system is extended and the failure rate is reduced.

[0036] As an alternative embodiment, the monitoring component 22 has in relation to Fig. 2 and Fig. 4 a monitoring body 221, which is fixedly attached to the bottom of the mounting ring 21, and a stop wheel 222, which is arranged at the end of the monitoring body 221.

[0037] In the present embodiment, the monitoring body 221 is a rectangular housing structure machined from an aluminum alloy extrusion profile type 6063T5, the surface of which undergoes an anodizing treatment to improve corrosion resistance. The monitoring body 221 is fastened to the base of the mounting ring 21 by a set of M12×50 screws, and the mounting surface is parallel to the toothed washer 12, thus ensuring that the monitoring direction is perpendicular to the toothed surface.

[0038] Preferably, the following functional modules are integrated into the monitoring body 221: the infrared sensor: The transmitter and receiver are arranged symmetrically on both sides of the housing and enable real-time measurement of the carbon deposit thickness on the tooth surface of the toothed disc with an accuracy of ± 0.05 mm. Pressure sensor: It is embedded in the base of the monitoring body and serves to measure the contact pressure between the stop wheel 222 and the tooth surface in the range of 0 to 50 N. Camera module: It is equipped with a waterproof housing and LED backlighting and transmits the tooth surface image to the control box via a wireless transmission module. The stop wheel 222 has a cylindrical roller structure with an outer diameter Φ50 mm; the core is made of a metal with a Shore hardness of 85A and encased in a polyurethane elastomer; and the surface is engraved with anti-slip structures to increase friction performance.The stop wheel 222 is articulated to the end of the monitoring body 221 via a pivot joint consisting of a bearing block and a ball bearing. This joint allows the stop wheel to pivot within a range of ± 15° to adapt to changes in the angle or wear of the tooth surface. When the stop wheel 222 is in contact with the keyway of the toothed disc 12, the control unit dynamically adjusts the position of the stop wheel by feedback of the contact force from the pressure sensor 221b according to the preset threshold value of 1030 N, thus ensuring stable contact of the cleaning component 25. In summary, the angle of the tooth surface is compensated for by pivoting the stop wheel 222, ensuring that the cleaning component 25 is always in contact with the tooth surface and improving cleaning performance.

[0039] As an alternative embodiment, the connecting component 24 has in relation to Fig. 1 and Fig. 7 a stop ring 241, which is simultaneously firmly attached to the mounting ring 21 and the base plate 111, a lifting element 242, which is slidably installed in the inner wall of the stop ring 241, and an adjusting rod 243, which is screwed to the inner wall of the lifting element 242.

[0040] In one embodiment of the present invention, the cleaning component 25 comprises a coupling element 251 which engages with one side of the drive wheel 142, a scraper element 252 which is connected to one side of the coupling element 251, and a collecting element 253 which is arranged on one side of the scraper element 252.

[0041] In one embodiment of the present invention, the coupling element 251 comprises a gear wheel 2511 which engages with one side of the drive wheel 142, an upper roller 2512 which engages with one side of the gear wheel 2511, and a lower roller 2513, the center of whose axis is connected to the bottom of the upper roller 2512.

[0042] In one embodiment of the present invention, the upper roller 2512 is identical to the lower roller 2513 and arranged in a mirror image;

[0043] The surface where the upper roller 2512 is adjacent to the lower roller 2513 is provided with a cam surface 31 and is firmly connected to a compression spring 32.

[0044] In one embodiment of the present invention, the lifting element 242 has a lifting rod 2421, which is screwed to the outside of the adjusting rod 243, and a detent rod 2422, which is slidably mounted on the outside of the lifting rod 2421; a projecting support M projects from both sides of the rod of the lifting rod 2421;

[0045] The locking bar 2422 is provided with a limiting groove N.

[0046] In one embodiment of the present invention, the scraper element 252 comprises a sliding plate 2521 which is slidably connected to the base of the mounting ring 21, a rack 2522 which is slidably connected to one side of the sliding plate 2521, a spring 2523 which is fixedly connected to one end of the rack 2522, and a scraper 2524 which is fixedly connected to one end of the sliding plate 2521.

[0047] In one embodiment of the present invention, the collecting element 253 has an arc plate 2531 which is fixedly arranged on the outer base of the lifting rod 2421.

[0048] In this embodiment, as in Fig. 5 and Fig. Figure 6 shows the inner wall of the stop ring 241 formed with an annular rail groove that interlocks with the flange structure of the outer wall of the mounting ring 21. The flange width is adapted to the depth of the rail groove to ensure that the lifting element 242 remains axially fixed during movement of the mounting ring 21 with the gondola 11.

[0049] Preferably, the stop ring 241 is provided at its tip with a cover lip made of elastic rubber material, which rests against the base of the mounting ring 21 to prevent dust from entering the zone in which the lifting element 242 moves. Preferably, the lifting element 242 consists, as shown in Fig. Figure 7 shows a locking rod 2422, which is mounted on the inner wall of the stop ring 241, and a lifting rod 2421, which engages with the radial sliding stop in the inner wall of the locking rod 2422. Here, both the locking rod 2422 and the lifting rod 2421 are hollow inside to facilitate a snap connection.

[0050] As in Fig. As shown in Figure 7, the projecting support M on both sides of the lifting rod 2421 and the limiting groove N on the bottom of the locking rod 2422 form a clearance fit, which allows the lifting rod 2421 to slide in the vertical direction while limiting its rotational freedom. When the lifting rod 2421 is moved downwards towards the upper end face of the upper roller 2512, the upper roller 2512 is pressed downwards to engage with the toothed surface of the lower roller 2513, thus achieving a locked drive.

[0051] The threaded hole in the inner wall of the lifting rod 2421 engages directly with the external thread of the adjusting rod 243, and when the adjusting rod 243 is rotated, the lifting rod 2421 is moved up and down. The guide angle of the threaded pair is designed to 5° to ensure a self-locking property and prevent unwanted retraction due to gravity.

[0052] The adjusting rod 243 is welded at its ends to the hexagonal hand crank, which the operator sets in motion by turning the threaded pair via the rotary handle. The hand crank and the adjusting rod 243 are connected by a wedge coupling to prevent slippage during torque transmission.

[0053] Preferably, the gear wheel 2511 and the drive wheel 142 transmit as shown in Fig. As shown in Figure 3, the force is transmitted via the engagement of the spur gear, and the contact length of the tooth surface is 80% of the tooth width, ensuring smooth power transmission. The other side of the gear wheel 2511 engages with the coupling element 251, which is coupled to a lower roller 2513 by an upper roller 2512. The horizontal position of the lower roller 2513 is fixed such that the effects on the lower roller 2513 when the upper roller 2512 changes are very small, and the coupling is loose, and the lower roller 2513 is not affected by the upper roller 2512. Conversely, if the effect on the lower roller 2513 is large when the upper roller 2512 changes, the coupling is tight, and the lower roller 2513 is affected by the upper roller 2512.

[0054] As in Fig. As shown in Figure 7, the upper roller 2512 and the lower roller 2513 are identical and arranged in a mirror image. Therefore, the tooth surfaces 31 of the upper roller 2512 and the lower roller 2513 are relatively offset, and the adjacent tooth surfaces 31 are elastically connected by a spring 32. Both ends of the spring 32 are secured in the groove of the upper roller 2512 and the lower roller 2513, respectively, to form a flexible drive chain with preload. The tooth surface 31 has a cross-tooth design, and the adjacent tooth tips and valleys are offset to ensure that the contact area is maximized during elastic engagement and that local stress concentration is reduced.

[0055] When the adjusting rod 243 rotates and drives the lifting rod 2421 to lower, the projecting supports M on both sides of the rod of the lifting rod 2421 move downwards towards the upper end face of the upper roller 2512, which in turn pushes the upper roller 2512 downwards so that it engages with the toothed surface 31 of the lower roller 2513 to achieve a tight coupling and at the same time compress the compression spring 32.

[0056] The upper roller 2512 and the lower roller 2513 are each connected to the bearing block of the locking rod 2422 by deep groove ball bearings in the inner wall, allowing the upper roller 2512 and the lower roller 2513 to rotate freely on the locking rod 2422. Here, the upper and lower ends of the lower roller 2513 are horizontally limited on the locking rod 2422 and cannot move up and down. The upper roller 2512 is always engaged with the gear wheel 2511 on one side, and the gear wheel 2511 is always engaged with the drive wheel 142. When the upper roller 2512 and the lower roller 2513 are tightly coupled, the upper roller 2512 rotates freely with the drive wheel 142 without overloading the motor 141, thus increasing the operating load.

[0057] Furthermore, the scraper element 252 is directly engaged with the gear surface of the lower roller 2513, so that the lower roller 2513 follows the upper roller 2412 to rotate while driving the scraper element 252, moving forward and backward in the direction in which the center of the axis extends, thereby completely contacting or separating the cleaning surface from the tooth surface.

[0058] As in Fig. 5 and Fig.As shown in Figure 6, the scraper element 252 comprises a sliding plate 2521, which is slidably and limitably connected to the base of the mounting ring 21, a rack 2522, which is slidably connected to one side of the sliding plate 2521, a spring 2523, which is fixedly connected to one end of the rack 2522, and a scraper 2524, which is fixedly connected to one end of the sliding plate 2521. The base of the mounting ring 21 is welded downwards with a rail groove that allows the sliding plate 2521 to slidably connect to the mounting ring 21. The side surface of the sliding plate 2521 is provided with a sliding groove throughout, and the straight plate surface of the rack 2522 is slidably connected to the sliding plate 2521 through a groove opening, and the tooth surface of the rack 2522 engages in the tooth surface of the lower roller 2513.

[0059] Next, one end of the rack 2522 is connected to the spring 2523 by a pin, and the other end of the spring 2523 is attached to the inner side of the sliding plate 2521. When the rack 2522 and the lower roller 2513 are driven, the sliding plate 2521 is elastically pressed by the elasticity of the spring 2523, so that the scraper 2524 is always elastically in contact with the toothed surface of the toothed disc 12. The spring 2523 can, in turn, provide a restoring force for the scraper 2524, so that it is released from the surface of the toothed disc 12 without any external force being applied.

[0060] After the upper roller 2512 has been pressed downwards by the projecting support M to be tightly coupled with the lower roller 2513, the lower roller 2513 rotates together with the upper roller 2512, and the lower roller 2513 moves the rack 2522 in the direction in which the axis center of the toothed disk 12 extends, so that it finally enters the keyway of the toothed disk 12. During the movement of the rack 2522, under the elastic action of the spring 2523 on one side, the sliding plate 2521 and the scraper 2524, which is connected to the end face of the sliding plate 2521 by a kind of pin, are pushed into the keyway of the toothed disk 12. When the scraper 2524 rests against the keyway of the toothed disc 12, the spring 2523 is compressed, thus preventing an overloaded fit between the rack 2522 and the lower roller 2513.

[0061] When the upper roller 2512 is released from its downward movement by the projecting support M, the compression spring 32 resets the upper roller 2512 so that it is decoupled from the lower roller 2513. At this point, the toothed disc 12 is also engaged and pushes the scraper 2524 out of the keyway, and the spring 2523, which was initially compressed, pushes the rack 2522 in the opposite direction to reset it.

[0062] Preferably, the scraper 2524 is a rubber plate to avoid notch wear on the toothed disc 12.

[0063] Preferably, the arc plate 2531, as shown in Figure 6, is mounted on the outer end of the lifting rod 2421, and its radius of curvature corresponds to the keyway of the toothed disc 12. As it follows the lifting rod 2421 downwards, it rests against the end of the tower 13, thus forming a closed waste collection chamber. During the rotation of the lifting rod 2421 around the toothed disc 12, the carbon deposit on the inside of the keyway, which is removed by the upper scraper 2524, is collected to facilitate collection and cleaning by the repair personnel.

[0064] In summary, the cleaning performance and reliability of the azimuth wheel are significantly increased by the elastic coupling and the adaptive design of the cleaning component 2. The coupling element 251 in the cleaning component 25 uses a mirror-image, interlocking flank design of the upper roller 2512 and the lower roller 2513 with the elastic engagement mechanism of the compression spring 32. This not only allows the gear wheel 2511 to be held in rigid engagement with the drive wheel 142, but also enables the flexible drive chain to be driven by the preload force of the compression spring 32, so that the scraper element 252 is driven to move synchronously during wind direction tracking operation.The rack 2522 and sliding plate 2521 of the scraper element 252 are elastically reset by the spring 2523 to ensure that the scraper 2524 always fits into the keyway and maintains clean contact, even if the tooth surface is inclined or oil accumulates, thus preventing insufficient clamping force or local overload. Furthermore, the arc-shaped deflection design of the arc plate 2531 fits into the keyway of the toothed disc 12, forming a closed waste collection chamber that effectively prevents waste from spreading during the cleaning process and improves collection efficiency.

[0065] Finally, it should be noted that the methods and devices described in detail above are merely exemplary embodiments which can be modified in various ways by those skilled in the art in this field without leaving the scope of the present invention.

Claims

[1] Device for cleaning an azimuth wheel of a wind turbine, comprising the following: a cabin unit (1) comprising a gondola (11), a toothed disc (12) articulated to the lower axis center of the gondola (11), a tower (13) fixedly arranged in the lower axis center of the toothed disc (12), and a drive element (14) arranged circumferentially in the lower axis center of the gondola (11); a cleaning component (2) arranged on the inner circumferential side of the toothed disc (12) and a mounting ring (21) fixedly arranged on the bottom of the gondola (11), a monitoring component (22) fixedly arranged on the lower circumferential side of the mounting ring (21), several sets of connecting components (24) fixedly arranged on the circumferential side of the mounting ring (21), and a cleaning component (25) articulated to the lower axis center of the connecting component (24). [2] Device for cleaning an azimuth wheel of a wind turbine according to claim 1, characterized by , that: The gondola (11) has a base plate (111) which is located on the ground; The drive element (14) comprises several sets of motors (141) which are fixed on the circumferential side of the base plate (111) and a drive wheel (142) which is fixedly arranged in the center of the axis of the motor (141). [3] Device for cleaning an azimuth wheel of a wind turbine according to claim 2, characterized by , that: The monitoring component (22) has a monitoring body (221) which is fixedly attached to the bottom of the mounting ring (21) and a stop wheel (222) which is arranged at the end of the monitoring body (221). [4] Device for cleaning an azimuth wheel of a wind turbine according to claim 3, characterized by , that: The connecting component (24) has a stop ring (241) which is simultaneously firmly attached to the mounting ring (21) and the base plate (111), a lifting element (242) which is slidably installed in the inner wall of the stop ring (241), and an adjusting rod (243) which is screwed to the inner wall of the lifting element (242). [5] Device for cleaning an azimuth wheel of a wind turbine according to claim 4, characterized by , that: The cleaning component (25) comprises a coupling element (251) that engages with one side of the drive wheel (142), a scraper element (252) that is connected to one side of the coupling element (251), and a collecting element (253) that is arranged on one side of the scraper element (252). [6] Device for cleaning an azimuth wheel of a wind turbine according to claim 5, characterized by , that: The coupling element (251) comprises a gear wheel (2511) which engages with one side of the drive wheel (142), an upper roller (2512) which engages with one side of the gear wheel (2511), and a lower roller (2513) whose center of axis is connected to the bottom of the upper roller (2512). [7] Device for cleaning an azimuth wheel of a wind turbine according to claim 6, characterized by , that: The upper roller (2512) is identical to the lower roller (2513) and arranged in a mirror image; The surface where the upper roller (2512) is adjacent to the lower roller (2513) is provided with a cam surface (31) and is firmly connected to a compression spring (32). [8] Device for cleaning an azimuth wheel of a wind turbine according to claim 7, characterized by , that: The lifting element (242) has a lifting rod (2421) which is screwed to the outside of the adjusting rod (243) and a locking rod (2422) which is slidably mounted on the outside of the lifting rod (2421); A projecting support (M) extends from both sides of the rod of the lifting rod (2421); The locking bar (2422) is provided with a limiting groove (N). [9] Device for cleaning an azimuth wheel of a wind turbine according to claim 8, characterized by , that: The scraper element (252) comprises a sliding plate (2521) which is slidably connected to the base of the mounting ring (21), a rack (2522) which is slidably connected to one side of the sliding plate (2521), a spring (2523) which is fixedly connected to one end of the rack (2522), and a scraper (2524) which is fixedly connected to one end of the sliding plate (2521). [10] Device for cleaning an azimuth wheel of a wind turbine according to claim 9, characterized by , that: The collecting element (253) has an arc plate (2531) which is fixedly arranged on the outer base of the lifting rod (2421).

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