Variable-diameter dismounting device for workpiece based on electromagnetic induction heating

Abstract

The variable-diameter workpiece dismounting and mounting device comprises a hollow cylinder and a plurality of sets of fixed transverse plates circumferentially and uniformly arranged on the outer side of the hollow cylinder, and the multiple sets of fixed transverse plates are driven by a first power structure to be synchronously close to or away from the hollow cylinder; movable transverse plates are slidably connected to the fixed transverse plates in the axial direction, the movable transverse plates are synchronously driven through a second power structure, and induction heating coils made of flexible materials are spirally arranged on the outer side walls of the movable transverse plates; through the cooperation of the fixed transverse plate and the movable transverse plate, not only can the diameter of the induction heating coil be changed, but also the heating device can be suitable for heating a connecting structure in the box body, after the diameter of the fixed transverse plate is changed, the movable transverse plate moves in the axial direction and is relatively arranged on the periphery of the connecting structure in a sleeving mode, and the heating difficulty of the connecting structure located in the box body can be reduced through the device.

Description

Technical Field

[0001] The invention relates to a workpiece diameter-variable disassembler based on electromagnetic induction heating, and belongs to the technical field of electromagnetic induction heating. Background Art

[0002] With the transformation of the global energy mix and the rapid development of renewable energy, wind power generation has become a vital component of the clean energy system. As wind turbines age, their core components, such as the transmission system (main shaft, gearbox, coupling, etc.), are increasingly exposed to issues such as aging and fatigue damage. For example, in mainstream wind turbines, such as the GE 2.75 MW model, the main shaft-gearbox coupling (such as the coupling sleeve and gearbox shrink disc) in the transmission system frequently experiences alternating loads and complex stresses, leading to frequent failures and fretting wear. This increases equipment downtime and surges operational and maintenance costs.

[0003] In this context, how to achieve non-destructive disassembly and reuse of these high-value components has become a technical problem that needs to be solved urgently in the field of wind power aftermarket operation and maintenance.

[0004] The main shaft system of the GE 2.75 MW turbine uses an interference fit assembly process. Currently, disassembly and assembly of interference fit components relies primarily on a combination of flame heating and hydraulic jacking, which is difficult to meet the requirements of efficient and non-destructive disassembly and assembly at wind power sites. At the same time, if Figure 1 As shown, part of the connection structure between the main shaft and the gearbox (such as the coupling expansion sleeve and the gearbox shrink disk) is located inside the box body, and the inner diameter of the opening of the box body is smaller than the outer diameter of the main shaft, which makes it difficult to disassemble and assemble the connection structure. Summary of the Invention

[0005] The object of the present invention is to provide a workpiece variable diameter disassembler based on electromagnetic induction heating to solve the problems raised in the above background technology.

[0006] The technical solutions of the present invention are as follows: A workpiece variable diameter disassembler based on electromagnetic induction heating includes a hollow cylinder and multiple groups of fixed horizontal plates evenly arranged on the outside of the hollow cylinder in a circumferential direction, and the multiple groups of fixed horizontal plates are driven synchronously by a first power structure to approach or move away from the hollow cylinder; each of the fixed horizontal plates is connected to an axially sliding movable horizontal plate, and the multiple groups of movable horizontal plates are synchronously driven by a second power structure, and the outer side walls of the multiple groups of movable horizontal plates are spirally provided with induction heating coils made of flexible material, and one group of the movable horizontal plates has an outer side wall provided with a spring reel, one end of the induction heating coil is fixed to one of the groups of movable horizontal plates, and the other end of the induction heating coil is connected to the spring reel through a first pull rope.

[0007] Preferably, the first power structure includes a threaded rod, a collar and a connecting rod. The collar is provided with two groups that are respectively connected to the left and right parts of the hollow cylinder for sliding along the axial direction of the hollow cylinder. The ends of the same side of multiple groups of fixed cross plates are connected to the collars on the same side through one-to-one corresponding connecting rods. The threaded rod is movably connected inside the coaxial hollow cylinder. The two collars are respectively threadedly connected to the left and right parts of the threaded rod and the thread directions are opposite.

[0008] Preferably, one end of the threaded rod extends to the outside of the hollow cylinder and is provided with a handwheel.

[0009] Preferably, the second power structure includes a sliding ring and a push rod, and each of the movable transverse plates is connected to the sliding ring via a one-to-one corresponding push rod, and the sliding ring is movably sleeved on the outer side wall of the hollow cylinder.

[0010] Preferably, corresponding guide blocks are provided on the outer walls at both ends of the hollow cylinder, and the second power structure also includes a second pull rope, one end of the second pull rope is connected to one set of movable horizontal plates or sliding rings, and the other end of the second pull rope is connected to the movable horizontal plate or sliding ring after being turned through two sets of guide blocks.

[0011] Preferably, the movable horizontal plate is provided with a sliding portion, and the sliding portion is movably sleeved on the outer side wall of the fixed horizontal plate.

[0012] Preferably, a guide ring is provided on the movable transverse plate, and the induction heating coil passes through the guide ring.

[0013] Preferably, a sliding groove is provided in the axial direction along the upper side of the movable transverse plate, a sliding block is slidably connected in the sliding groove, and the guide ring is provided on the sliding block.

[0014] Preferably, a second rack is provided on one side of the slider, a gear meshing with the second rack is rotatably connected in the slide groove, a return spring is provided between the inner wall of the slide groove and the slider, a first rack is provided on the fixed horizontal plate, and the gear meshes with the first rack during the process of the movable horizontal plate moving relative to the fixed horizontal plate to extend the length of the combination of the two.

[0015] Preferably, the guide rings on each group of the movable transverse plates are arranged at different positions along the axial direction of the hollow cylinder.

[0016] The present invention has the following beneficial effects: The present invention replaces the flame heating + hydraulic jacking of the prior art with an induction heating coil, which makes on-site operation safer. In addition, the induction heating coil can heat components of different outer diameters to change their diameters as needed, and has wider applicability.

[0017] The present invention not only realizes the diameter change of the induction heating coil through the cooperation of the fixed transverse plate and the movable transverse plate, but also is suitable for heating the connecting structure inside the box. After the fixed transverse plate changes its diameter, the movable transverse plate moves axially and is relatively sleeved around the outer periphery of the connecting structure. This device can reduce the difficulty of heating the connecting structure inside the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of an application scenario of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 3 for Figure 2 Schematic diagram of the structure after removing the induction heating coil and guide ring; Figure 4 This is a schematic diagram of the coordination structure of the fixed horizontal plate and the movable horizontal plate of the present invention; Figure 5 This is a schematic diagram of the matching structure of the gear and the first and second racks of the present invention; Figure 6 This is a schematic diagram of the second power structure of the present invention.

[0019] The reference numerals in the figures are as follows: 1. Hollow cylinder; 2. Threaded rod; 3. Ring; 4. Connecting rod; 5. Fixed cross plate; 52. First rack; 6. Movable cross plate; 61. Slide groove; 62. Slider; 63. Second rack; 64. Gear; 65. Return spring; 66. Sliding part; 7. Guide ring; 8. Induction heating coil; 9. Spring reel; 10. First pull rope; 11. Second pull rope; 12. Guide block; 13. Sliding ring; 14. Push rod. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example: like Figure 1 Shown is a schematic diagram of a specific application scenario of this disassembly and assembly tool.

[0022] A workpiece disassembler with variable diameter based on electromagnetic induction heating, such as Figure 2-Figure 6 As shown: It includes a hollow cylinder 1 and a fixed transverse plate 5 arranged in a circumferential annular array around the axis of the hollow cylinder 1. The fixed transverse plate 5 is always arranged parallel to the axis of the hollow cylinder 1. like Figure 3As shown, the first power structure includes a threaded rod 2, two sets of collars 3 and multiple sets of connecting rods 4. The threaded rod 2 is relatively rotatably connected to the inside of the coaxial hollow cylinder 1. One set of collars 3 is slidably connected to the left end of the hollow cylinder 1 along the axis of the hollow cylinder 1. The collars 3 partially extend into the interior of the hollow cylinder 1 and are connected to the threaded rod 2 with a left-hand thread; another set of collars 3 is slidably connected to the right end of the hollow cylinder 1 along the axis of the hollow cylinder 1. The collars 3 partially extend into the interior of the hollow cylinder 1 and are connected to the threaded rod 2 with a right-hand thread. The left end of the fixed horizontal plate 5 is hinged to a set of connecting rods 4, and the other end of the connecting rods 4 is hinged to the left collar 3; the right end of the fixed horizontal plate 5 is hinged to another set of connecting rods 4, and the other end of the connecting rods 4 is hinged to the right collar 3; A handwheel is provided at the left end of the threaded rod 2, which is used to manually rotate the threaded rod 2. The rotation of the threaded rod 2 drives the two sets of rings 3 to move in the synchronous direction of the hollow cylinder 1, and under the action of the connecting rod 4, the fixed cross plate 5 is driven to move radially closer to or away from the hollow cylinder 1 along the hollow cylinder 1.

[0023] Each group of fixed transverse plates 5 is provided with a corresponding movable transverse plate 6 on the side facing away from the hollow cylinder 1. The movable transverse plate 6 is always arranged parallel to the axis of the hollow cylinder 1. The movable transverse plate 6 slides along the axis of the hollow cylinder 1 relative to the corresponding fixed transverse plate 5. Several guide rings 7 are provided on the movable transverse plate 6 along the axis direction of the hollow cylinder 1.

[0024] The induction heating coil 8 is spirally arranged on the outer wall of multiple groups of movable horizontal plates 6 with the hollow cylinder 1 as the center. The end of the induction heating coil 8 with a handwheel close to the threaded rod 2 is fixed to one of the movable horizontal plates 6. A spring reel 9 is provided at the end of any group of movable horizontal plates 6 facing away from the threaded rod 2 with a handwheel. The spring reel 9 can be automatically reeled. The other end of the induction heating coil 8 is connected to the spring reel 9 through a first pull rope 10. The first pull rope 10 is thinner and can be reeled into the spring reel 9.

[0025] like Figure 4 As shown, a sliding portion 66 is fixedly provided on the movable transverse plate 6. The sliding portion 66 is a closed loop structure adapted to the outer contour of the fixed transverse plate 5. The movable transverse plate 6 slides linearly relative to the fixed transverse plate 5 via the sliding portion 66.

[0026] like Figure 6 As shown, the second power structure includes a sliding ring 13, a push rod 14, a second pull rope 11 and a guide block 12. The sliding ring 13 is relatively sleeved on the outside of the hollow cylinder 1 and can slide freely along the axis of the hollow cylinder 1. The sliding portion 66 of each movable horizontal plate 6 is hinged to a corresponding push rod 14 on the side close to the hollow cylinder 1. The other end of each push rod 14 is hinged to the sliding ring 13, and the sliding ring 13 is movably sleeved on the outer wall of the hollow cylinder 1. The outer walls of the left and right ends of the hollow cylinder 1 are provided with corresponding guide blocks 12. Figure 6The red line in the figure shows the second pull rope 11. One end of the second pull rope 11 is fixed to any one set of sliding parts 66. The other end of the second pull rope 11 is movably passed through the guide block 12 and then fixedly connected to the sliding part 66.

[0027] like Figure 4 、 Figure 5 As shown, a slide groove 61 is provided on the movable horizontal plate 6 along the axis direction of the hollow cylinder 1, and a slider 62 is slidably connected to the slide groove 61 along the axis direction of the hollow cylinder 1. A return spring 65 is connected between the slider 62 and the inner side wall of the slide groove 61. The elastic force of the return spring 65 pushes the slider 62 to move to the left (towards the end of the threaded rod 2 with the handwheel), and a gear 64 is rotatably connected to the slide groove 61. A second rack 63 is provided on one side of the slider 62, and the gear 64 is always in mesh with the second rack 63. A groove is provided on the side wall of the fixed horizontal plate 5 close to the movable horizontal plate 6 , in which a first rack 52 is provided. Both the first rack 52 and the second rack 63 extend along the axis of the hollow cylinder 1 . Under normal conditions, the first rack 52 is not engaged with the gear 64 .

[0028] Working principle: The disassembly tool with a smaller overall outer diameter can be inserted into Figure 1 The sealing box is opened and roughly coaxially aligned with the main shaft. At this time, the disassembly and assembly tools are not placed on the outer periphery of the main shaft. Then the handwheel is manually rotated to rotate the threaded rod 2. The rotation of the threaded rod 2 drives the two sets of threaded rings 3 to move synchronously closer to each other. Under the action of the connecting rod 4, each set of fixed cross plates 4 is radially away from the outer wall of the hollow cylinder 1, thereby achieving diameter expansion.

[0029] During this process, since the induction heating coil 8 is flexible and can follow the transformation to achieve diameter expansion, the induction heating coil 8 drives the first pull rope 10 to be pulled out from the spring reel 9 to adapt.

[0030] Then, the second pull rope 11 is manually pulled to move, and the second pull rope 11 drives the movable horizontal plate 6 to move relative to the fixed horizontal plate 5 through the sliding part 66. The movable horizontal plate 6 moves and drives the sliding ring 13 to follow the movement through the push rod 14. The sliding ring 13 follows the movement and pushes the respective movable horizontal plates 6 to follow the synchronous movement through the remaining push rods 14, so that the movable horizontal plates 6 move relative to the outer periphery of the connecting structure. At this time, the hollow setting between the suspended free ends of multiple groups of movable horizontal plates 6 can be used to accommodate the main shaft and the connecting structure.

[0031] During the movement of the movable horizontal plate 6 relative to the fixed horizontal plate 5, Figure 5In the direction of the arrow mark, the gear 64 fails to mesh with the first rack 52 for a period of time. After moving a certain distance, the gear 64 meshes with the first rack 52 and continues to move. The gear 64 rotates under the action of meshing with the first rack 52. The gear 64 rotates and the second rack 63 cooperates to drive the slider 62 to move in the slide groove 61 and compress the reset spring 65. The slider 6 moves along the attached Figure 5 Move in the direction of the arrow in the figure, so that the guide ring 7 on the slider 6 moves a short distance. The guide ring 7 on each group of movable horizontal plates 6 is arranged at different positions along the axial position of the hollow cylinder 1. The distance of the guide ring 7 on each group of movable horizontal plates 6 following the movement can be controlled according to demand; Since the overall length of the induction heating coil 8 is fixed, the above design can achieve that when the movable horizontal plate 6 moves outward relative to the fixed horizontal plate, each group of guide rings 7 follows the movement to expand the spacing, thereby achieving a sparse pitch of the spirally arranged induction heating coil 8; The distance that the guide ring 7 moves is much smaller than the distance that the movable transverse plate 6 moves relative to the fixed transverse plate 5 . In this normal state, there is a certain distance between the gear 64 and the first rack 52 .

[0032] The equal-pitch spiral arrangement of the induction heating coil 8 is achieved by the guide ring 7 arranged on the movable transverse plate 6 .

[0033] After the induction heating coil 8 is energized and the connection structure is heated, the second pull rope 11 is pulled in the opposite direction, driving the guide ring 7 to move toward one end of the threaded rod 2 with the handwheel, so that each set of movable horizontal plates 6 is separated from the outer periphery of the connection structure. During this process, when the movable horizontal plates 6 move inward relative to the fixed horizontal plates, each set of guide rings 7 follows and narrows the distance between them, thereby achieving a denser pitch of the spirally arranged induction heating coil 8 and a smaller diameter of the induction heating coil 8. The spring reel 9 and the first pull rope 10 cooperate to keep the induction heating coil 8 always taut and in close contact with the outer wall of the movable horizontal plate 6. The slider 62 is reset under the action of the reset spring 65.

[0034] The above descriptions are merely embodiments of the present invention and are not intended to limit the scope of the present invention. Any equivalent structures or equivalent process changes made using the contents of the present invention's description and drawings, or directly or indirectly applied to other related technical fields, are also included in the scope of the present invention's patent protection.

Claims

1. A workpiece variable diameter disassembler based on electromagnetic induction heating, comprising a hollow cylinder (1) and a plurality of groups of fixed transverse plates (5) uniformly arranged circumferentially on the outside of the hollow cylinder (1), wherein the plurality of groups of fixed transverse plates (5) are driven synchronously to approach or move away from the hollow cylinder (1) by a first power structure, and characterized in that: Each of the fixed transverse plates (5) is axially slidably connected to a movable transverse plate (6), and multiple groups of the movable transverse plates (6) are synchronously driven by a second power structure. The outer walls of the multiple groups of movable transverse plates (6) are spirally provided with induction heating coils (8) made of flexible material, and one group of the movable transverse plates (6) is provided with a spring reel (9) on its outer wall. One end of the induction heating coil (8) is fixed to one of the groups of movable transverse plates (6), and the other end of the induction heating coil (8) is connected to the spring reel (9) via a first pull rope (10).

2. The workpiece variable diameter disassembler based on electromagnetic induction heating according to claim 1, characterized in that: The first power structure comprises a threaded rod (2), a collar (3) and a connecting rod (4); the collar (3) is provided with two groups respectively connected to the left and right parts of the hollow cylinder (1) along the axial direction of the hollow cylinder (1); the ends of the same side of the plurality of fixed transverse plates (5) are connected to the collar (3) on the same side through corresponding connecting rods (4); the threaded rod (2) is movably connected inside the coaxial hollow cylinder (1); the two collars (3) are respectively threadedly connected to the left and right parts of the threaded rod (2) and the thread directions are opposite.

3. The workpiece variable diameter disassembler based on electromagnetic induction heating according to claim 2, characterized in that: One end of the threaded rod (2) extends to the outside of the hollow cylinder (1) and is provided with a handwheel.

4. The workpiece variable diameter disassembler based on electromagnetic induction heating according to claim 1, characterized in that: The second power structure comprises a sliding ring (13) and a push rod (14), and each of the movable horizontal plates (6) is connected to the sliding ring (13) through a one-to-one corresponding push rod (14), and the sliding ring (13) is movably sleeved on the outer wall of the hollow cylinder (1).

5. The workpiece variable diameter disassembler based on electromagnetic induction heating according to claim 4, characterized in that: The outer walls of the left and right ends of the hollow cylinder (1) are both provided with corresponding guide blocks (12). The second power structure further includes a second pull rope (11). One end of the second pull rope (11) is connected to one set of movable horizontal plates (6) or sliding rings (13). The other end of the second pull rope (11) is connected to the movable horizontal plate (6) or sliding ring (13) after being turned through the two sets of guide blocks (12).

6. The workpiece variable diameter disassembler based on electromagnetic induction heating according to claim 4, characterized in that: The movable horizontal plate (6) is provided with a sliding portion (66), and the sliding portion (66) is movably sleeved on the outer side wall of the fixed horizontal plate (5).

7. The workpiece variable diameter disassembler based on electromagnetic induction heating according to claim 1, characterized in that: A guide ring (7) is provided on the movable transverse plate (6), and the induction heating coil (8) passes through the guide ring (7).

8. The workpiece variable diameter disassembler based on electromagnetic induction heating according to claim 7, characterized in that: A sliding groove (61) is provided on the movable transverse plate (6) along the axial direction, a sliding block (62) is slidably connected in the sliding groove (61), and the guide ring (7) is arranged on the sliding block (62).

9. The workpiece variable diameter disassembler based on electromagnetic induction heating according to claim 8, characterized in that: A second rack (63) is provided on one side of the slider (62), a gear (64) meshing with the second rack (63) is rotatably connected in the slide groove (61), a return spring (65) is provided between the inner wall of the slide groove (61) and the slider (62), a first rack (52) is provided on the fixed transverse plate (5), and the gear (64) meshes with the first rack (52) when the movable transverse plate (6) moves relative to the fixed transverse plate (5) to extend the length of the movable transverse plate (6).

10. The workpiece variable diameter disassembler based on electromagnetic induction heating according to claim 9, characterized in that: The guide rings (7) on each group of movable transverse plates (6) are arranged at different positions along the axial direction of the hollow cylinder (1).

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