A kind of milling device suitable for wind turbine yaw brake disc processing

Abstract

The application relates to the brake disc machining technical field and discloses a groove milling device suitable for yaw brake disc machining of a wind turbine generator set. The device comprises a placing part, the placing part comprises a base, a bearing seat is fixedly installed at the top of the base, a supporting assembly for bearing a brake disc body is assembled in the bearing seat; a milling part, the milling part comprises a switching seat rotatably installed on the base, the switching seat is assembled with a mounting plate through a translation set arranged at the top of the switching seat, the mounting plate is assembled with a milling assembly for milling grooves on the brake disc body through a switching assembly arranged at the outer side of the mounting plate. The groove milling device suitable for yaw brake disc machining of the wind turbine generator set can effectively solve the problem that, in the prior art, after the upper surface of the brake disc is completely machined, the brake disc needs to be hoisted as a whole by hoisting equipment, manually turned over, repositioned and clamped, repositioning and clamping after turning over are prone to introducing positioning deviation, and the groove milling precision of the friction surface of the brake disc is affected.

Description

Technical Field

[0001] This invention relates to the field of brake disc processing technology, specifically to a milling device suitable for processing yaw brake discs of wind turbine generator sets. Background Technology

[0002] The yaw brake disc of a wind turbine generator set is a key actuator in the yaw braking system. It is typically a large, annular disc-shaped component, with its upper and lower end faces forming annular friction surfaces that directly contact the yaw brake pads. To ensure smooth and reliable braking, several radial, oblique, or continuous spiral shallow grooves are milled along the circumference on the upper and lower annular friction surfaces of the brake disc. These grooves do not penetrate the disc body, are generally shallow, and are distributed within the effective friction area of ​​the disc surface.

[0003] Due to the large diameter and mass of yaw brake discs, conventional milling processes typically employ the following steps: The brake disc is horizontally clamped and fixed on the worktable of a conventional milling machine or machining center using a specialized fixture. The upper surface is milled first. After all grooves on the upper surface are machined, the brake disc must be lifted using hoisting equipment, manually rotated, and re-aligned and clamped before milling the lower surface can begin. However, each brake disc requires a lifting, rotation, and secondary clamping process. The repositioning and re-clamping after rotation easily introduce positioning deviations, making it difficult to guarantee the relative positional accuracy and symmetry between the upper and lower grooves. This negatively impacts the uniformity of chip and water removal on both sides of the brake disc and the consistency of braking performance. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a milling device suitable for machining yaw brake discs of wind turbine generator sets. This device effectively solves the problem in existing technologies where, after all grooves on the upper surface are machined, the brake disc must be lifted and manually rotated for re-alignment and clamping. Each brake disc requires a lifting, rotation, and secondary clamping process, and the repositioning and clamping after rotation easily introduces positioning deviations, making it difficult to guarantee the relative positional accuracy and symmetry between the upper and lower grooves, thus affecting the milling accuracy of the brake disc's friction surface.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a milling device suitable for machining yaw brake discs of wind turbine generator sets, comprising: The placement part includes a base, and a support seat is fixedly installed on the top of the base. The support seat is equipped with a support component for supporting the brake disc body. The milling section includes a switching seat rotatably mounted on a base, and the switching seat is equipped with a mounting plate by a translation assembly disposed on its top, the mounting plate being equipped with a milling assembly for milling grooves on the brake disc body by a switching assembly disposed on its outer side; When the milling component is in the initial position, it can mill grooves on the top of the brake disc body. When the switching component flips the milling component 180 degrees, it can mill grooves on the bottom of the brake disc body.

[0006] Furthermore, the milling unit also includes a drive unit for driving the switching seat to rotate along its own central axis; The drive unit includes a gear ring fixedly mounted on the outer circumference of the switching base, a motor fixedly mounted on the base, and a gear meshing with the gear ring fixedly mounted on the output end of the motor.

[0007] Furthermore, the support component includes an opening slot formed on the support seat, and the opening slot has multiple slots arranged in a circumferential array along the central axis of the support seat. A support frame is fixedly installed on the top of the support seat, and the number of support frames corresponds one-to-one with the opening slots. Each set of support frames has two slots arranged symmetrically along the central plane of the opening slot.

[0008] Furthermore, a bearing plate is rotatably mounted between the bearing frames in the same group, and a magnetic component for fixing the brake disc body is fixedly installed inside the bearing plate. A hydraulic cylinder connected to the outside of the bearing plate is assembled in the opening slot.

[0009] Furthermore, the switching component includes a clearance hole formed on the mounting plate, and the clearance hole is arc-shaped. An arc-shaped guide rail is fixedly mounted on the outer side of the mounting plate, and the central axis of the arc-shaped guide rail coincides with the central axis of the clearance hole.

[0010] Furthermore, a movable seat is slidably mounted on the arc-shaped guide rail, and a gear ring II is fixedly mounted on the outer side of the arc-shaped guide rail. The movable seat is equipped with a gear II that meshes with the gear ring II via a motor II located inside it.

[0011] Furthermore, the milling assembly includes a fixed frame fixedly mounted on a movable base, and the fixed frame is equipped with an adjustment seat via an adjustment unit disposed therein, and a housing is fixedly mounted therein, and the housing is equipped with a milling cutter body via a drive unit disposed therein.

[0012] Furthermore, a guide rod is fixedly installed at the bottom of the housing, and multiple guide rods are arranged in a circular array along the central axis of the housing. A protective plate is fixedly installed at the bottom of the housing, and the four corners of the protective plate are respectively fitted onto the guide rods on the same side. A counterweight block connected to the protective plate is slidably installed on the outer circumference of the guide rod. The protective plate is made of elastic material.

[0013] The technical solution provided by this invention has the following advantages compared with the prior art: 1. This invention is equipped with a switching component, which enables the milling component to rotate 180 degrees, allowing the cutter to switch between two postures: "machine the top surface downwards" and "machine the bottom surface upwards." The workpiece clamping reference remains constant. After the top groove of the brake disc is milled, the second motor in the switching component starts, driving the second gear to rotate. The second gear meshes with the second gear ring fixed on the outside of the arc-shaped guide rail, driving the moving seat to slide along the arc-shaped guide rail. The sliding of the moving seat causes the entire milling component mounted on it to rotate 180 degrees, so that the milling cutter body, which was originally downwards, is now upwards. Subsequently, with the feed of the translation unit and the adjustment unit, the bottom surface can be directly milled. During this process, the absolute rotation direction of the milling cutter remains unchanged, and the workpiece is always fixed in its original position, thus completely avoiding the positioning deviation caused by hoisting, rotating, and secondary clamping.

[0014] 2. This invention includes a support assembly that employs multiple independently controlled bearing plate structures, enabling "on-demand avoidance" during bottom milling. The bearing seat has multiple slots arranged circumferentially along its central axis. Each set of slots has two symmetrically positioned bearing frames above them, with bearing plates hinged between the frames. When the milling assembly flips to process the bottom surface and rotates towards a specific bearing plate, that plate blocks the bottom surface. At this point, the magnetic components within that bearing plate demagnetize and release the workpiece. Simultaneously, the hydraulic cylinder piston rod retracts within the slot, pulling the bearing plate downwards around its hinge center and into the slot, exposing the blocked processing area. After the milling assembly leaves this area, the hydraulic cylinder piston rod extends, restoring the bearing plate to a horizontal position, and the magnetic components re-energize to attract the workpiece. Because the power and control circuits of each bearing plate are independent, during single-point avoidance, the bearing plates in other non-interference areas maintain horizontal support and magnetic attraction, preventing overall support failure due to localized avoidance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention; Figure 2 This is a cross-sectional view of the base according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the planar structure of the milling part according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the three-dimensional separation structure supporting the component name in an embodiment of the present invention; Figure 5 This is an embodiment of the present invention. Figure 4 A magnified structural diagram of part A in the middle; Figure 6 This is a schematic diagram of the three-dimensional separation structure of the switching component according to an embodiment of the present invention; Figure 7 This is an embodiment of the present invention. Figure 6 A magnified structural diagram of section B in the middle; Figure 8 This is a schematic diagram of the planar state transformation structure of the protective plate according to an embodiment of the present invention; Figure 9 This is an embodiment of the present invention. Figure 8 A magnified structural diagram of part C in the middle.

[0017] The labels in the diagram represent: 100. Brake disc body; 1. Placement section; 11. Base; 12. Bearing seat; 13. Support assembly; 131. Opening slot; 132. Bearing frame; 133. Bearing plate; 134. Magnetic component; 135. Hydraulic cylinder; 2. Milling section; 21. Switching seat; 22. Translation unit; 23. Mounting plate; 24. Switching assembly; 241. Clearance hole; 242. Arc guide rail; 243. Moving seat; 244. Gear ring two; 245. Motor two; 246. Gear two; 25. Milling assembly; 251. Fixing frame; 252. Adjustment unit; 253. Adjustment seat; 254. Housing; 255. Milling cutter body; 256. Guide rod; 2561. Protective plate; 2562. Counterweight; 26. Drive unit; 261. Gear ring one; 262. Motor one; 263. Gear one. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] The present invention will be further described below with reference to embodiments.

[0020] Example:

[0021] Please see Figures 1-9 This invention provides a technical solution: a milling device suitable for machining yaw brake discs of wind turbine generator sets, comprising: Placement part 1 includes a base 11, and a support seat 12 is fixedly installed on the top of the base 11. A support assembly 13 for supporting the brake disc body 100 is assembled inside the support seat 12. The milling part 2 includes a switching seat 21 rotatably mounted on the base 11, and the switching seat 21 is equipped with a mounting plate 23 by a translation unit 22 provided on its top, and the mounting plate 23 is equipped with a milling assembly 25 for milling grooves on the brake disc body 100 by a switching assembly 24 provided on its outside. When the milling assembly 25 is in its initial position, it can mill grooves on the top of the brake disc body 100. When the switching assembly 24 rotates the milling assembly 25 180 degrees, it can mill grooves on the bottom of the brake disc body 100. The milling assembly 25 achieves a 180-degree rotation through the switching assembly 24, thus switching between two postures: "cutter facing down to machine the top surface" and "cutter facing up to machine the bottom surface." During this process, the absolute rotation direction of the milling cutter should remain unchanged when machining the top and bottom. That is to say, regardless of whether the milling cutter is in a downward or upward cutting state, its rotation direction is constant when viewed from the end of the milling cutter towards the tip.

[0022] The milling unit 2 also includes a drive unit 26 for driving the switching seat 21 to rotate along its own central axis; The drive unit 26 includes a gear ring 261 fixedly mounted on the outer circumference of the switching base 21, a motor 262 fixedly mounted on the base 11, and a gear 263 that meshes with the gear ring 261 fixedly mounted on the output end of the motor 262.

[0023] The support component 13 includes an opening slot 131 formed on the support seat 12. The opening slot 131 has multiple slots and is arranged in a circumferential array along the central axis of the support seat 12. A support frame 132 is fixedly installed on the top of the support seat 12. The number of support frames 132 corresponds one-to-one with the opening slots 131. Each set of support frames 132 has two slots and is symmetrically distributed along the central surface of the opening slot 131. The present invention adopts an array of support plates 133 with "multiple independent control". When the milling cutter body 255 moves to a certain position, only the single set of support plates 133 retracts into the opening slot 131 to avoid it, while the other multiple sets of support plates 133 in the circumferential direction still maintain horizontal adsorption support. This strategy of "alternating avoidance and overall support" ensures that the rigid support of the workpiece is not interrupted throughout the bottom surface processing process, and any circumferential position of the bottom surface can be exposed for processing, achieving the dual effect of no blind spots and anti-deformation.

[0024] A support plate 133 is rotatably mounted between the support frames 132 in the same group, and a magnetic component 134 for fixing the brake disc body 100 is fixedly installed in the support plate 133. A hydraulic cylinder 135 connected to the outside of the support plate 133 is assembled in the opening slot 131. The magnetic component 134 is an electromagnet, which integrates a main permanent magnet, an auxiliary permanent magnet and an excitation coil. The magnetic circuit state can be switched by a momentary pulse electrical signal: when a positive pulse current is applied, the magnetic circuit is open to the outside, forming a strong magnetic field on the support surface and generating a stable adsorption force on the bottom surface of the brake disc; when a reverse demagnetizing pulse is applied, the magnetic circuit is closed inside the unit, the external magnetic flux is almost zero, and the adsorption force is completely released.

[0025] The switching component 24 includes a clearance hole 241 formed on the mounting plate 23, and the clearance hole 241 is arc-shaped. An arc-shaped guide rail 242 is fixedly installed on the outer side of the mounting plate 23, and the central axis of the arc-shaped guide rail 242 coincides with the central axis of the clearance hole 241.

[0026] A movable seat 243 is slidably mounted on the arc-shaped guide rail 242. A gear ring 244 is fixedly mounted on the outer side of the arc-shaped guide rail 242. The movable seat 243 is equipped with a gear 246 that meshes with the gear ring 244 through a motor 245 located inside it.

[0027] The milling assembly 25 includes a fixed frame 251 fixedly mounted on a movable base 243, and the fixed frame 251 is equipped with an adjusting base 253 via an adjusting unit 252 disposed therein, and a housing 254 is fixedly mounted inside the adjusting base 253, and a milling cutter body 255 is equipped on the housing 254 via a drive unit disposed therein.

[0028] A guide rod 256 is fixedly installed at the bottom of the housing 254, and multiple guide rods 256 are arranged in a circular array along the central axis of the housing 254. A protective plate 2561 is fixedly installed at the bottom of the housing 254, and the four corners of the protective plate 2561 are respectively sleeved on the guide rod 256 on the same side. A counterweight 2562 connected to the protective plate 2561 is slidably installed on the outer circumference of the guide rod 256. The protective plate 2561 is made of elastic material.

[0029] The working principle and advantages of the milling device for machining yaw brake discs of wind turbine generators: In the existing machining process for milling grooves on the friction surface of yaw brake discs of wind turbine generator sets, special fixtures are generally used to horizontally clamp and position the brake disc workpiece on the worktable of a conventional milling machine or machining center. The machining process follows a step-by-step operation mode of upper end milling, workpiece flipping, secondary clamping, and lower end milling: first, all grooves on the upper end of the workpiece are milled, and then the large-mass brake disc is hoisted and manually flipped by lifting equipment. After secondary alignment and re-clamping and positioning, the lower end milling operation can be carried out.

[0030] In this invention, the milling assembly 25 is mounted on the motion execution end of the switching assembly 24. After all the groove milling on the upper surface of the brake disc body 100 is completed, the switching assembly 24 outputs a rotary motion, driving the milling assembly 25 to rotate 180 degrees around a set axis, so that the cutting surface of the milling tool changes from facing the upper surface of the workpiece to facing the lower surface of the workpiece. Under the premise that the workpiece clamping reference remains constant, the groove milling of the lower surface can be completed. The specific process is as follows: Workpiece positioning and clamping process: The brake disc body 100 to be processed is transferred to the support seat 12 of the placement part 1 via external hoisting equipment, and is initially supported by the support assembly 13. In the initial state, the piston rod of the hydraulic cylinder 135 in the opening slot 131 is driven to extend. Since the piston rod is hinged to the support plate 133, the extension of the piston rod forces the support plate 133 to deflect around the rotation center of the support frame 132 until the support surface of the support plate 133 returns to a horizontal state. After the brake disc body 100 is hoisted to the support plate 133 and positioned, the magnetic component 134 in the support plate 133 is energized to generate magnetic force, which rigidly attracts and fixes the brake disc body 100 to the support seat 12, thereby providing a stable positioning reference for subsequent milling processing.

[0031] Milling operation on the top of the brake disc body (100mm): After the brake disc body 100 is clamped, the drive unit 26 starts to operate: the motor 262 drives the gear 263 to rotate at a constant speed. The gear 263 meshes with the gear ring 261 fixedly installed on the outer circumference of the switching seat 21, thereby driving the switching seat 21 to rotate along its own central axis. During this process, the base 11 and the bearing seat 12 remain relatively stationary. When the switching seat 21 drives the milling assembly 25 to rotate to the preset position of the first milled groove on the top of the brake disc body 100, the motor 262 stops and brakes, and the switching seat 21 is positioned.

[0032] Subsequently, the switching component 24 performs position calibration: the motor 245 drives the gear 246 to rotate, meshing with the gear ring 244 fixed on the outside of the arc guide rail 242, driving the moving seat 243 to slide along the arc guide rail 242 to adjust the spatial posture of the milling cutter body 255, ensuring that its central axis remains perpendicular to the surface to be machined on the brake disc body 100.

[0033] During feed cutting, the translation unit 22 drives the mounting plate 23 to move along the direction close to the bearing seat 12. Since the mounting plate 23 has an arc-shaped clearance hole 241, the mounting plate 23 does not structurally interfere with the brake disc body 100 during displacement. After the mounting plate 23 is in place, the adjustment unit 252 in the fixing frame 251 drives the milling cutter body 255 to feed along its axial direction. At the same time, the drive unit in the housing 254 drives the milling cutter body 255 to rotate at high speed to mill the top surface of the brake disc body 100. After the single groove is machined, the adjustment unit 252 and the translation unit 22 work together to retract the cutter. The drive unit 26 then drives the switching seat 21 to rotate to the next milling station. This cycle continues until all grooves on the top surface are machined.

[0034] Milling position switching and bottom milling operation: After the top surface of the brake disc body 100 is machined, the bottom surface needs to be milled. At this time, the switching component 24 is activated, and the motor 245 drives the gear 246 and the gear ring 244 to continuously mesh and transmit power, causing the moving seat 243 to slide and rotate 180 degrees along the arc-shaped guide rail 242. The milling cutter body 255, which was originally facing the top of the brake disc body 100, is turned to face the bottom. Subsequently, according to the feed and cutting process of milling grooves on the top of the brake disc, the milling cutter body 255 translates and feeds axially to the first milling groove position on the bottom of the brake disc, and performs the milling operation on the bottom surface of the brake disc. This process is repeated to complete the machining of all grooves on the bottom surface.

[0035] During bottom milling, when the milling assembly 25 rotates and approaches the position of a certain support plate 133, the support plate 133 will block the area to be milled on the bottom surface, preventing the milling cutter body 255 from performing milling operations at that position. When the milling assembly 25 moves to the position of a certain support plate 133, the magnetic component 134 in that support plate 133 loses power and demagnetizes, releasing its adsorption. At the same time, the hydraulic cylinder 135 drives its piston rod to retract, causing the support plate 133 to deflect downwards around its rotation center and retract into the opening slot 131 of the support seat 12, thereby exposing the originally blocked area, allowing the milling cutter body 255 to smoothly feed and mill the bottom of the brake disc body 100.

[0036] It is worth noting that multiple sets of bearing plates 133 are arranged in a circular array along the central axis of the bearing seat 12. Each set of bearing plates 133 is equipped with an independent hinged support structure, an independent hydraulic cylinder 135, and an independent magnetic component 134. The power circuit and control circuit of each set of bearing plates 133 are independent of each other. When the milling assembly 25 moves to the area corresponding to a certain bearing plate 133, the magnetic component 134 of that set of bearing plates 133 is first de-energized and demagnetized, releasing the adsorption constraint on the bottom surface of the workpiece. Then, the piston rod of the corresponding hydraulic cylinder 135 retracts, pulling the bearing plate 133 to deflect and retract into the opening slot 131 of the bearing seat 12 around its hinge axis, completely exiting the bottom surface of the workpiece. The machining space provides radial and axial machining clearance space for the milling cutter body 255. When the milling assembly 25 completes the groove machining in this area and leaves the corresponding circumferential range of the support plate 133, the piston rod of the hydraulic cylinder 135 extends, driving the support plate 133 to rotate and reset to the horizontal support position. The magnetic component 134 is simultaneously energized to restore magnetic adsorption and rejoin the workpiece support. The clearance action is only performed on the single support plate 133 at the current interference position. All support plates 133 in the other non-interference areas maintain a horizontal support posture and magnetic adsorption state. The actions of each support plate 133 are independent and controllable, and the overall support will not fail due to single-point clearance.

[0037] During bottom milling, due to gravity, the chips and cutting fluid generated during cutting easily accumulate near the milling cutter body 255. A guide rod 256 and an elastic protective plate 2561 are provided at the bottom of the housing 254. A counterweight 2562 is slidably connected to the guide rod 256. Under the action of gravity, the counterweight 2562 slides down along the guide rod 256 and pulls down the four corners of the protective plate 2561, forcing the elastic protective plate 2561 to deform into a conical guide surface. This effectively prevents the accumulation of chips and cutting fluid in the machining area, ensuring the quality of the machined surface and the smoothness of milling.

[0038] It is worth noting that the protective plate 2561 is made of elastic material. The protective plate 2561 has a through hole in the center for the milling cutter body 255 to pass through. Its inner ring edge is rigidly fixed to the end face of the housing 254. The outer ring extends to the position of the guide rod 256 with an installation angle. The installation angle slides on the corresponding guide rod 256 and can slide freely along the axial direction of the rod. Each guide rod 256 is fitted with a counterweight 2562 that can slide freely along the rod. The counterweight 2562 is rigidly connected to the corresponding installation angle of the protective plate 2561. The weight of the counterweight 2562 provides a continuous and stable driving force for the deformation of the protective plate 2561. When the milling cutter body 255 performs milling operations on the top of the brake disc, the protective plate 2561 undergoes elastic deformation, which shields and restrains the radially splashing chips and cutting fluid, reducing the splashing of cutting fluid and the scattering of chips, and maintaining the cleanliness of the machining area. When the milling cutter body 255 performs milling operations on the bottom of the brake disc, the elastic deformation triggered by the counterweight forms a conical guide surface, which guides the falling chips and cutting fluid to the surrounding areas, completely preventing chips from accumulating between the milling cutter and the workpiece, preventing repeated crushing of chips from causing scratches on the workpiece surface and excessive roughness of the groove wall, and at the same time preventing poor tool heat dissipation and abnormal chipping of the cutting edge caused by chip accumulation, ensuring the smoothness of the milling process and the quality of the machined surface.

[0039] After the top and bottom surfaces of the brake disc body 100 have been milled, the milling assembly 25 exits the working area, and all the magnetic components 134 on the support plate 133 stop working. At this time, the operator can use external hoisting equipment to remove the finished brake disc body 100 from the support plate 133.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A milling device suitable for machining yaw brake discs of wind turbine generator sets, characterized in that, include: Placement part (1), the placement part (1) includes a base (11), and a support seat (12) is fixedly installed on the top of the base (11), and a support assembly (13) for supporting the brake disc body (100) is assembled inside the support seat (12). The milling section (2) includes a switching seat (21) rotatably mounted on a base (11), and the switching seat (21) is fitted with a mounting plate (23) by a translation unit (22) provided on its top, and the mounting plate (23) is fitted with a milling assembly (25) for milling grooves on the brake disc body (100) by a switching assembly (24) provided on its outside. When the milling assembly (25) is in the initial position, the milling assembly (25) can perform milling groove processing on the top of the brake disc body (100). When the switching assembly (24) flips the milling assembly (25) 180 degrees, the milling assembly (25) can perform milling groove processing on the bottom of the brake disc body (100).

2. The milling device for machining yaw brake discs of wind turbine generator sets according to claim 1, characterized in that: The milling unit (2) also includes a drive unit (26) for driving the switching seat (21) to rotate along its own central axis. The drive unit (26) includes a gear ring (261) fixedly installed on the outer circumference of the switching seat (21), a motor (262) fixedly installed on the base (11), and a gear (263) meshing with the gear ring (261) fixedly installed at the output end of the motor (262).

3. The milling device for machining yaw brake discs of wind turbine generator sets according to claim 1, characterized in that: The support component (13) includes an opening slot (131) on the support seat (12), and the opening slot (131) is provided in multiple and distributed in a circular array along the central axis of the support seat (12). The top of the support seat (12) is fixedly installed with a support frame (132), and the number of the support frames (132) corresponds one-to-one with the opening slot (131). Each set of support frames (132) is provided in two and distributed symmetrically along the central surface of the opening slot (131).

4. A milling device for machining yaw brake discs of wind turbine generator sets according to claim 3, characterized in that: A bearing plate (133) is rotatably mounted between the bearing frames (132) in the same group, and a magnetic component (134) for fixing the brake disc body (100) is fixedly installed in the bearing plate (133). A hydraulic cylinder (135) connected to the outside of the bearing plate (133) is assembled in the opening slot (131).

5. A milling device for machining yaw brake discs of wind turbine generator sets according to claim 1, characterized in that: The switching component (24) includes a clearance hole (241) on the mounting plate (23), and the clearance hole (241) is arc-shaped. An arc-shaped guide rail (242) is fixedly installed on the outer side of the mounting plate (23), and the central axis of the arc-shaped guide rail (242) coincides with the central axis of the clearance hole (241).

6. A milling device for machining yaw brake discs of wind turbine generator sets according to claim 5, characterized in that: A movable seat (243) is slidably mounted on the arc-shaped guide rail (242). A gear ring (244) is fixedly mounted on the outer side of the arc-shaped guide rail (242). The movable seat (243) is equipped with a gear (246) that meshes with the gear ring (244) through a motor (245) located inside it.

7. A milling device for machining yaw brake discs of wind turbine generator sets according to claim 6, characterized in that: The milling assembly (25) includes a fixed frame (251) fixedly mounted on a movable base (243), and the fixed frame (251) is equipped with an adjusting base (253) via an adjusting unit (252) disposed therein, and a housing (254) is fixedly mounted inside the adjusting base (253), and the housing (254) is equipped with a milling cutter body (255) via a drive unit disposed therein.

8. A milling device for machining yaw brake discs of wind turbine generator sets according to claim 7, characterized in that: The bottom of the housing (254) is fixedly installed with a guide rod (256), and the guide rod (256) is provided in multiple and arranged in a circular array along the central axis of the housing (254). The bottom of the housing (254) is fixedly installed with a protective plate (2561), and the four corners of the protective plate (2561) are respectively sleeved on the guide rod (256) on the same side. The outer circumferential surface of the guide rod (256) is slidably installed with a counterweight (2562) connected to the protective plate (2561). The protective plate (2561) is made of elastic material.

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