Induction quenching process for large-scale wind power inner gear ring

Abstract

The invention discloses a large-scale wind power inner gear ring induction quenching process, and relates to the technical field of wind power gear boxes, the large-scale wind power inner gear ring induction quenching process comprises a detection table, S1, gear ring placement: firstly, placing a gear ring at the top end of a base; s2, fixing the gear ring: the gear ring placed at the top end of the base is clamped and fixed at the top end of the base through a side clamping plate, a front clamping plate and a rear baffle plate at the top end of the base; and S3, the heating device extends into the inner gear ring, specifically, an electric push rod pushes a push rod to descend downwards, and a second servo motor at the bottom end of the push rod, a rotary disc and a walking induction box extend into the inner gear ring. The first joint, the pressure spring and the second joint elastically extend to be close to the surface of the inner gear ring; the walking induction box extending into the inner gear ring is driven by a second servo motor to rotate and slowly move along the surface of the inner gear ring, in the moving process of the walking induction box, the U-shaped high-temperature copper pipe is used for conducting high-temperature quenching on the surface of the inner gear ring, then cooling is conducted along with air, and quenching of the inner gear ring is completed.

Description

Technical Field

[0001] This invention relates to the field of wind turbine gearbox technology, specifically to an induction hardening process for a large wind turbine internal gear ring. Background Technology

[0002] Induction hardening of large wind turbine internal gear rings is a surface heat treatment process for mechanical parts. It transforms supercooled austenite into martensite or bainite, followed by tempering at different temperatures, to improve the gear's strength, hardness, wear resistance, fatigue strength, and toughness. This process is mainly used for gears subjected to alternating loads, employing techniques such as flame hardening, induction hardening, contact resistance heating hardening, or laser hardening to achieve surface strengthening, resulting in minimal deformation.

[0003] Currently, large wind turbine gearboxes are large in size, resulting in a very large diameter of the internal gear ring inside. Industry research has found that the maximum diameter of the internal gear ring in a large wind turbine gearbox is 3.77 meters. Traditional heating methods for the internal gear ring cannot meet the heating requirements of such a large internal gear ring. Therefore, an induction hardening process for large wind turbine internal gear rings is proposed. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide an induction hardening process for large wind turbine internal gear rings to solve the problem that the large size of current large wind turbine gearboxes results in a very large diameter of the internal gear rings inside the gearboxes. Industry research has found that the maximum diameter of the internal gear rings in large wind turbine gearboxes is 3.77 meters, and traditional internal gear ring heating methods cannot meet the technical requirements for heating such large internal gear rings.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A large-scale wind turbine internal gear ring induction hardening process, including a testing platform. S1. Placement of the gear ring: First, place the gear ring on top of the base; S2. Gear ring fixing: The gear ring placed at the top of the base is clamped and fixed at the top of the base by the side clamping plate, front clamping plate and rear baffle at the top of the base; S3. Heating device extends into the inner gear ring: The electric push rod pushes the push rod down, and the servo motor at the bottom of the push rod, the turntable, and the walking sensor box extend into the inner gear ring. S4. Extension of walking sensor box: The walking sensor box inserted into the inner gear ring extends elastically to the surface of the inner gear ring through the first joint, the compression spring, and the second joint. S5. Walking sensor box walking quenching: The walking sensor box inserted into the inner gear ring is driven to rotate by a servo motor and slowly move along the surface of the inner gear ring. During the movement of the walking sensor box, the surface of the inner gear ring is quenched at high temperature using a U-shaped high-temperature copper tube and then cooled with air to complete the quenching of the inner gear ring.

[0006] The large wind turbine internal gear ring induction hardening process described in steps S1-S2 above is specifically completed by a large wind turbine internal gear ring induction hardening device. The large wind turbine internal gear ring induction hardening device includes a fixed base, a side support rib plate that stands upright on the top surface of the fixed base is fixed to the top of the fixed base, a top support rib plate is fixed to the top of the side support rib plate, an electric push rod is fixedly installed to the top of the top support rib plate, a push rod extends downward from the electric push rod, and a reciprocating swing walking induction box is installed at the bottom end of the push rod. The wind turbine internal gear ring to be quenched is fixedly installed at the top of the fixed base.

[0007] As a preferred embodiment of the present invention, a rear baffle is provided at the top of the fixed base, a reciprocating sliding front clamping plate is provided in front of the rear baffle, and side clamping plates are symmetrically provided on the left and right sides of the rear baffle. The wind turbine internal gear ring is placed in the middle of the side clamping plates on both sides, and each side clamping plate is provided with a corresponding electric push rod. The electric push rod on each side is fixedly installed at the top of the fixed base.

[0008] As a preferred embodiment of the present invention, the front clamping plate includes a sliding groove formed at the top of the fixed base, a movable slider is slidably connected in the sliding groove, the front clamping plate is fixed to the top of the movable slider, a threaded screw is rotatably connected in the sliding groove, the movable slider is threadedly connected to the threaded screw, a front servo motor is fixedly installed on the front end face of the fixed base, and one end of the threaded screw is fixedly connected to the output shaft of the front servo motor.

[0009] As a preferred embodiment of the present invention, the walking sensor box includes a second servo motor fixed to the bottom end of the push rod, the second servo motor having an output shaft extending downwards, and a turntable fixedly mounted on the surface of the output shaft of the second servo motor.

[0010] As a preferred embodiment of the present invention, the surface of the turntable is provided with a first joint, the top end of the first joint is provided with a movable joint, the surface of the movable joint is rotatably connected to a second joint, a compression spring is provided between the second joint and the first joint for elastic extension, and the top end of the second joint is rotatably connected to a traveling gear.

[0011] As a preferred embodiment of the present invention, the traveling gear includes a rotating shaft mounted on the top of the second joint. The top of the rotating shaft is provided with a threaded section, and a gear limiting spacer is threadedly connected to the surface of the threaded section. Two sensor box locking tongues are provided on the surface of the traveling sensor box. The sensor box locking tongues are mounted on both ends of the rotating shaft. The two sensor box locking tongues are located on the surface of the gear limiting spacer. Locking nuts are installed on the outer wall of the sensor box locking tongues.

[0012] As a preferred embodiment of the present invention, a U-shaped high-temperature copper tube is provided on the surface of the walking sensor box, and the U-shaped high-temperature copper tube is non-contact induction heated to the surface of the wind turbine inner gear ring.

[0013] As a preferred embodiment of the present invention, a high-speed moving camera is provided on the surface of the walking sensor box.

[0014] As a preferred embodiment of the present invention, the walking sensor box is locked to the side of the walking gear by the sensor box locking tongue, and the angle of the walking sensor box on the side of the walking gear is adjustable.

[0015] This invention first places a gear ring at the top of a base; the gear ring at the top of the base is clamped and fixed to the top of the base by a side clamping plate, a front clamping plate, and a rear baffle; an electric push rod pushes a push rod downwards, and the servo motor two, the turntable, and the walking sensor box at the bottom of the push rod extend into the inner gear ring; the walking sensor box, which extends into the inner gear ring, elastically extends close to the surface of the inner gear ring through a first joint, a compression spring, and a second joint; the walking sensor box, which extends into the inner gear ring, is driven to rotate by the servo motor two and moves slowly along the surface of the inner gear ring; during the movement of the walking sensor box, the surface of the inner gear ring is quenched at high temperature using a U-shaped high-temperature copper tube and then cooled with air, thus completing the quenching of the inner gear ring.

[0016] Specifically, the travel sensor box of the present invention extends into the inner gear ring through the elastic extension of the first joint, the compression spring, and the second joint, so that the travel sensor box is close to the surface of the inner gear ring; and the travel gear rolls along the surface of the inner gear ring. At this time, through the structural design of the rotating shaft, the threaded section, the gear limiting spacer, the sensor box locking tongue, and the locking nut, the travel sensor box can be locked and fixed to the side of the travel gear by the sensor box locking tongue while the travel gear rotates, and maintain the adjusted angle, which is conducive to the heating and quenching of the inner ring of the large wind turbine gearbox.

[0017] By heating the internal gear ring locally while it is moving, the heated surface of the internal gear ring is rapidly cooled by the air, thus achieving the air quenching process. The walking sensor box is driven by a servo motor to slowly rotate along the surface of the internal gear ring at a uniform speed. One rotation can complete the heating of the entire internal gear ring, ensuring that no part of the large gear ring is missed.

[0018] This invention utilizes a high-speed moving camera in conjunction with a U-shaped high-temperature copper tube. The high-speed moving camera detects whether the walking sensor box moves on the surface of the internal gear ring. When the camera detects movement, the U-shaped high-temperature copper tube generates high temperature, achieving automated induction heating. Simultaneously, through electromagnetic induction, a high-frequency current flows through the copper tube coil, generating an alternating magnetic field that rapidly heats the gear surface, completing the quenching process. This technology, with its advantages of non-contact heating, high efficiency and energy saving, and precise temperature control, has become the mainstream choice for heat treatment of transmission components such as gears and sprockets. Two copper tubes (induction coils) are wound into a ring or contoured structure. After passing a 20-400kHz high-frequency current, an alternating magnetic field is generated that penetrates the gear surface. Eddy current effect and skin effect: Eddy currents are generated on the gear (conductive metal) surface due to electromagnetic induction. The eddy current energy is converted into heat energy, and the heating rate can reach 50-200℃ per second. The higher the frequency, the more concentrated the heat is on the surface (skin depth is only 0.1-2mm), which is suitable for quenching the gear surface and maintaining the core toughness.

[0019] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the logical steps of the induction hardening process for the large wind turbine internal gear ring of the present invention. Figure 2 This is a front view schematic diagram of the induction hardening process for the large-scale wind turbine internal gear ring of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the left side of the large-scale wind turbine internal gear ring induction hardening device of the present invention. Figure 4 This is a top view of the structure of the large walking sensor box of the present invention extending into the internal gear ring. Figure 5 Appendix to the specification of this invention Figure 3 Enlarged view of a portion at point A; Figure 6 This is a schematic diagram of the working surface structure of the walking sensor box of the present invention facing the internal gear ring; In the diagram: 1. Fixed base; 2. Side support rib; 3. Top support rib; 4. Electric push rod; 5. Push rod; 6. Turntable; 7. First joint; 8. Side clamping plate; 9. Electric push rod; 10. Front servo motor; 11. Front clamping plate; 12. Rear baffle; 13. Sliding groove; 14. Threaded screw; 15. Movable slider; 16. Second joint; 17. Traveling gear; 18. Traveling sensor box; 19. Compression spring; 20. Movable joint; 21. Servo motor 22. Rotating shaft; 22. Threaded section; 23. Gear limit plate; 24. Sensor box locking tongue; 25. Locking nut; 26. High-speed moving camera; 27. U-shaped high-temperature copper tube; 28. Detailed Implementation

[0021] 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 embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable. Example

[0026] Please see Figure 1-6The present invention provides a technical solution: an induction hardening process for large wind turbine internal gear rings, including a testing platform 3. S1. Placement of the gear ring: First, place the gear ring on the top of the base 1; S2, Gear ring fixing: The gear ring placed at the top of the base 1 is clamped and fixed at the top of the base 1 by the side clamping plate 8, the front clamping plate 11, and the rear baffle 12 at the top of the base 1. S3. Heating device extends into the inner gear ring: Electric push rod 4 pushes push rod 5 down, and servo motor 21, turntable 6 and walking sensor box 18 at the bottom of push rod 5 extend into the inner gear ring. S4. The walking sensor box 18 extends: The walking sensor box 18, which is inserted into the inner gear ring, extends elastically to the surface of the inner gear ring through the first joint 7, the compression spring 19, and the second joint 16. S5. Walking sensor box 18 walking quenching: The walking sensor box 18, which extends into the inner gear ring, is driven to rotate by servo motor 21 and moves slowly along the surface of the inner gear ring. During the movement of the walking sensor box 18, the surface of the inner gear ring is quenched at high temperature by U-shaped high-temperature copper tube 28 and then cooled with air to complete the quenching of the inner gear ring.

[0027] Specifically, the travel sensor box of the present invention extends into the inner gear ring through the elastic extension of the first joint, the compression spring, and the second joint, so that the travel sensor box is close to the surface of the inner gear ring; and the travel gear rolls along the surface of the inner gear ring. At this time, through the structural design of the rotating shaft, the threaded section, the gear limiting spacer, the sensor box locking tongue, and the locking nut, the travel sensor box can be locked and fixed to the side of the travel gear by the sensor box locking tongue while the travel gear rotates, and maintain the adjusted angle, which is conducive to the heating and quenching of the inner ring of the large wind turbine gearbox.

[0028] Specifically, the internal gear ring is heated locally while moving, and the heated surface of the internal gear ring is rapidly cooled by the air, thus realizing the air quenching process. The walking sensor box is driven by a servo motor to slowly rotate along the surface of the internal gear ring at a uniform speed. One rotation can complete the heating of the entire internal gear ring, ensuring that no part of the heating is missed, even for large gear rings.

[0029] Example 2 Please see Figure 1-6 This is another technical solution provided by the present invention. This embodiment has the same features as the above embodiment 1, and the similarities will not be described in this embodiment. The specific differences are as follows: According to the large wind turbine internal gear ring induction hardening process described in Embodiment 1 above, the large wind turbine internal gear ring induction hardening process described in steps S1-S2 above is specifically completed by a large wind turbine internal gear ring induction hardening device. The large wind turbine internal gear ring induction hardening device includes a fixed base 1, a side support rib 2 that is upright on the top surface of the fixed base 1 is fixed at the top of the fixed base 1, a top support rib 3 is fixed at the top of the side support rib 2, an electric push rod 4 is fixedly installed at the top of the top support rib 3, a push rod 5 extends downward from the electric push rod 4, and a reciprocating swing walking induction box 18 is installed at the bottom of the push rod 5. The wind turbine internal gear ring to be quenched is fixedly installed on the top of the fixed base 1.

[0030] A rear baffle 12 is provided at the top of the fixed base 1. A front clamping plate 11 that slides back and forth is provided in front of the rear baffle 12. Side clamping plates 8 are symmetrically arranged on the left and right sides of the rear baffle 12. The wind turbine internal gear ring is placed in the middle of the side clamping plates 8 on both sides. Each side clamping plate 8 is provided with a corresponding electric push rod 9 for pushing. The electric push rod 9 on each side is fixedly installed at the top of the fixed base 1.

[0031] Specifically, in this embodiment, the front clamping plate 11 includes a sliding groove 13 formed at the top of the fixed base 1. A movable slider 15 is slidably connected in the sliding groove 13. The front clamping plate 11 is fixed to the top of the movable slider 15. A threaded screw 14 is rotatably connected in the sliding groove 13. The movable slider 15 is threadedly connected to the threaded screw 14. A front servo motor 10 is fixedly installed on the front end face of the fixed base 1. One end of the threaded screw 14 is fixedly connected to the output shaft of the front servo motor 10.

[0032] Specifically, in this embodiment, the walking sensor box 18 includes a servo motor 21 fixed to the bottom of the push rod 5. The servo motor 21 has an output shaft extending downwards, and a turntable 6 is fixedly mounted on the surface of the output shaft of the servo motor 21.

[0033] Specifically, in this embodiment, the surface of the turntable 6 is provided with a first joint 7, the top of the first joint 7 is provided with a movable joint 20, the surface of the movable joint 20 is rotatably connected to a second joint 16, a compression spring 19 is provided between the second joint 16 and the first joint 7 for elastic extension, and the top of the second joint 16 is rotatably connected to a traveling gear 17.

[0034] Specifically, in this embodiment, the walking gear 17 includes a rotating shaft 22 installed at the top of the second joint 16. The top of the rotating shaft 22 is provided with a threaded section 23. A gear limiting spacer 24 is threadedly connected to the surface of the threaded section 23. Two sensor box locking tongues 25 are provided on the surface of the walking sensor box 18. The sensor box locking tongues 25 are installed at both ends of the rotating shaft 22. The two sensor box locking tongues 25 are provided on the surface of the gear limiting spacer 24. Locking nuts 26 are installed on the outer wall of the sensor box locking tongues 25. The locking nuts 26 are locked and fixed to the gear limiting spacer 24.

[0035] Specifically, in this embodiment, a U-shaped high-temperature copper tube 28 is provided on the surface of the walking sensor box 18, and the U-shaped high-temperature copper tube 28 is non-contact induction heated with the surface of the wind turbine inner gear ring.

[0036] Specifically, in this embodiment, a high-speed moving camera 27 is provided on the surface of the walking sensor box 18. The high-speed moving camera can detect whether the walking sensor box moves on the surface of the inner gear ring.

[0037] The walking sensor box 18 is locked to the side of the walking gear 17 by the sensor box locking tongue 25, and the angle of the walking sensor box 18 on the side of the walking gear 17 is adjustable, so as to adjust the fixed angle of the walking sensor box 18 according to the internal gear ring of different diameters, so as to better complete the quenching state.

[0038] Specifically, in this embodiment, the invention first places the gear ring at the top of the base; the gear ring placed at the top of the base is clamped and fixed at the top of the base by the side clamping plate, front clamping plate and rear baffle at the top of the base; the electric push rod pushes the push rod downward, and the servo motor 2, turntable and walking sensor box at the bottom of the push rod extend into the inner gear ring; the walking sensor box extending into the inner gear ring elastically extends close to the surface of the inner gear ring through the first joint, compression spring and second joint; the walking sensor box extending into the inner gear ring is driven to rotate by the servo motor 2 and slowly move along the surface of the inner gear ring. During the movement of the walking sensor box, the surface of the inner gear ring is quenched at high temperature by a U-shaped high temperature copper tube and then cooled with air to complete the quenching of the inner gear ring.

[0039] Specifically, the travel sensor box of the present invention extends into the inner gear ring through the elastic extension of the first joint, the compression spring, and the second joint, so that the travel sensor box is close to the surface of the inner gear ring; and the travel gear rolls along the surface of the inner gear ring. At this time, through the structural design of the rotating shaft, the threaded section, the gear limiting spacer, the sensor box locking tongue, and the locking nut, the travel sensor box can be locked and fixed to the side of the travel gear by the sensor box locking tongue while the travel gear rotates, and maintain the adjusted angle, which is conducive to the heating and quenching of the inner ring of the large wind turbine gearbox.

[0040] Specifically, the internal gear ring is heated locally while moving, and the heated surface of the internal gear ring is rapidly cooled by the air, thus realizing the air quenching process. The walking sensor box is driven by a servo motor to slowly rotate along the surface of the internal gear ring at a uniform speed. One rotation can complete the heating of the entire internal gear ring, ensuring that no part of the heating is missed, even for large gear rings.

[0041] This invention utilizes a high-speed moving camera in conjunction with a U-shaped high-temperature copper tube. The high-speed moving camera detects whether the sensor box moves on the surface of the internal gear ring. When the camera detects movement, the U-shaped high-temperature copper tube generates high temperature, achieving automated induction heating. Simultaneously, through electromagnetic induction, a high-frequency current flows through the copper tube coil, generating an alternating magnetic field that rapidly heats the gear surface, completing the quenching process. This technology, with its advantages of non-contact heating, high efficiency and energy saving, and precise temperature control, has become the mainstream choice for heat treatment of transmission components such as gears and sprockets. Two copper tube induction coils are wound into a ring or contoured structure. After passing a 20-400kHz high-frequency current, an alternating magnetic field is generated that penetrates the gear surface. Eddy current effect and skin effect: Eddy currents are generated on the conductive metal surface of the gear due to electromagnetic induction. The eddy current energy is converted into heat energy, and the heating rate can reach 50-200℃ per second. The higher the frequency, the more concentrated the heat is on the surface. The skin depth is only 0.1-2mm, suitable for gear surface quenching while maintaining core toughness.

[0042] High-speed moving cameras and U-shaped high-temperature copper tubes are now widely used as the mainstream choice for heat treatment of various gears, sprockets and other transmission components. Their structure and working principle are well-known technologies in this field.

[0043] In this embodiment, the high-speed moving camera and the U-shaped high-temperature copper tube are all existing technologies and will not be described in detail in this embodiment. Any such electronic component in the prior art that can achieve the technical effect described in this application specification can be used as a replacement for the electronic component in this application.

[0044] Finally, it should be noted that 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 preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A large-scale wind turbine internal gear ring induction hardening process, comprising a testing platform (3), characterized in that: S1. Placement of the gear ring: First, place the gear ring on top of the base; S2. Gear ring fixing: The gear ring placed at the top of the base is clamped and fixed at the top of the base by the side clamping plate, front clamping plate and rear baffle at the top of the base; S3. Heating device extends into the inner gear ring: The electric push rod pushes the push rod down, and the servo motor at the bottom of the push rod, the turntable, and the walking sensor box extend into the inner gear ring. S4. Extension of walking sensor box: The walking sensor box inserted into the inner gear ring extends elastically to the surface of the inner gear ring through the first joint, the compression spring, and the second joint. S5. Walking sensor box walking quenching: The walking sensor box inserted into the inner gear ring is driven to rotate by a servo motor and slowly move along the surface of the inner gear ring. During the movement of the walking sensor box, the surface of the inner gear ring is quenched at high temperature using a U-shaped high-temperature copper tube and then cooled with air to complete the quenching of the inner gear ring.

2. The induction hardening process for a large wind turbine internal gear ring according to claim 1, characterized in that: The large wind turbine internal gear ring induction hardening process described in steps S1-S2 above is specifically completed by a large wind turbine internal gear ring induction hardening device. The large wind turbine internal gear ring induction hardening device includes a fixed base (1), a side support rib (2) that stands upright on the top surface of the fixed base (1) is fixed at the top of the fixed base (1), a top support rib (3) is fixed at the top of the side support rib (2), an electric push rod (4) is fixedly installed at the top of the top support rib (3), a push rod (5) extends downward from the electric push rod (4), and a reciprocating swing walking induction box (18) is installed at the bottom of the push rod (5). The wind turbine internal gear ring to be quenched is fixedly installed on the top of the fixed base (1).

3. The induction hardening process for a large wind turbine internal gear ring according to claim 2, characterized in that: The top of the fixed base (1) is provided with a rear baffle (12), and a front clamping plate (11) that slides back and forth is provided in front of the rear baffle (12). Side clamping plates (8) are symmetrically provided on the left and right sides of the rear baffle (12). The wind turbine internal gear ring is placed in the middle of the side clamping plates (8) on both sides. Each side clamping plate (8) is provided with a corresponding electric push rod (9) to push it. The electric push rod (9) on each side is fixedly installed on the top of the fixed base (1).

4. The induction hardening process for a large wind turbine internal gear ring according to claim 3, characterized in that: The front clamping plate (11) includes a sliding groove (13) opened at the top of the fixed base (1). A movable slider (15) is slidably connected in the sliding groove (13). The front clamping plate (11) is fixed to the top of the movable slider (15). A threaded screw (14) is rotatably connected in the sliding groove (13). The movable slider (15) is threadedly connected to the threaded screw (14). A front servo motor (10) is fixedly installed on the front end face of the fixed base (1). One end of the threaded screw (14) is fixedly connected to the output shaft of the front servo motor (10).

5. The induction hardening process for a large wind turbine internal gear ring according to claim 1, characterized in that: The walking sensor box (18) includes a second servo motor (21) fixed to the bottom of the push rod (5). The second servo motor (21) has an output shaft extending downwards, and a turntable (6) is fixedly installed on the surface of the output shaft of the second servo motor (21).

6. The induction hardening process for a large wind turbine internal gear ring according to claim 5, characterized in that: The surface of the turntable (6) is provided with a first joint (7), the top of the first joint (7) is provided with a movable joint (20), the surface of the movable joint (20) is rotatably connected with a second joint (16), a compression spring (19) is provided between the second joint (16) and the first joint (7) for elastic extension, and the top of the second joint (16) is rotatably connected with a traveling gear (17).

7. The induction hardening process for a large wind turbine internal gear ring according to claim 6, characterized in that: The traveling gear (17) includes a rotating shaft (22) installed at the top of the second joint (16). The top of the rotating shaft (22) is provided with a threaded section (23). The surface of the threaded section (23) is threadedly connected to a gear limiting plate (24). The surface of the traveling sensor box (18) is provided with two sensor box locking tongues (25). The sensor box locking tongues (25) are installed at both ends of the rotating shaft (22). The two sensor box locking tongues (25) are provided on the surface of the gear limiting plate (24). The outer wall of the sensor box locking tongues (25) is provided with a locking nut (26).

8. The induction hardening process for a large wind turbine internal gear ring according to claim 1, characterized in that: The surface of the walking sensor box (18) is provided with a U-shaped high-temperature copper tube (28), which is non-contact induction heated to the surface of the wind turbine inner gear ring.

9. The induction hardening process for a large wind turbine internal gear ring according to claim 8, characterized in that: A high-speed moving camera (27) is provided on the surface of the walking sensor box (18).

10. The induction hardening process for a large wind turbine internal gear ring according to claim 7, characterized in that: The walking sensor box (18) is locked to the side of the walking gear (17) by the sensor box locking tongue (25), and the angle of the walking sensor box (18) on the side of the walking gear (17) is adjustable.

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