Rotor structure and assembly tool

Abstract

The invention relates to the technical field of magnetic suspension equipment, and provides a rotor structure and an assembly tool. The rotor structure comprises a core shaft and magnetic steel sleeved on the core shaft, the surface of the core shaft is recessed to form mounting grooves, the mounting grooves extend along the circumferential direction, the magnetic steel is arranged in the mounting grooves, titanium rings are arranged at two ends of the magnetic steel along the axial direction, one titanium ring is abutted between one side of the magnetic steel and the groove wall of the mounting groove on the corresponding side, and the other titanium ring is abutted between the other side of the magnetic steel and the groove wall of the mounting groove on the corresponding side. One titanium ring abuts against the magnetic steel, the other titanium ring abuts against the position between the other side of the magnetic steel and the groove wall of the mounting groove in the corresponding side, at least one of the two titanium rings forms a wedge-shaped titanium ring, and the width of the section of the wedge-shaped titanium ring is gradually reduced in the direction pointing to the axis of the mandrel along the circumferential face of the mandrel. According to the rotor structure provided by the invention, the pressing force in the axial direction can be generated between the wedge-shaped titanium ring and the groove wall of the mounting groove, so that the flexural rigidity of the rotor structure can be enhanced, the critical rotation speed of the rotor structure is improved, and the rotor structure has relatively good operation stability.

Description

Technical Field

[0001] The present application relates to the technical field of magnetic suspension equipment, and in particular to a rotor structure and an assembly tool. Background Art

[0002] With the development of society and enterprises, energy is becoming increasingly scarce and the operating costs of enterprises are rising. In the fierce market environment, enterprises adopt more energy-saving and efficiency-enhancing equipment, among which magnetic levitation equipment is widely used due to its lack of friction and other losses.

[0003] Since the bearing stiffness of magnetic levitation equipment is much smaller than that of traditional mechanical bearings, when the rotor speed reaches the critical speed, the magnetic levitation rotor will not be able to levitate and the system will not be able to operate. In order to reduce costs during the research and development process, companies often directly use existing motors. However, when the operating speed of the motor increases, the critical speed of the motor rotor no longer meets the design requirements. Therefore, it is necessary to increase the critical speed of the rotor while ensuring that the rotor appearance remains unchanged. The main method currently used is to reduce the thickness of the magnetic steel and increase the diameter of the core shaft to increase the structural strength, but it is easy to cause the temperature of the motor rotor to rise, reduce efficiency, and even cause irreversible demagnetization of the magnetic steel. Summary of the invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a rotor structure and an assembly tool.

[0005] A first aspect of the present application provides a rotor structure, comprising a core shaft and a magnetic steel sleeved on the core shaft, wherein a mounting groove is formed on a surface of the core shaft, and the mounting groove is extended along a circumferential direction, and the magnetic steel is arranged in the mounting groove;

[0006] Titanium rings are provided at both ends of the magnetic steel in the axial direction, one of the titanium rings abuts between one side of the magnetic steel and the groove wall of the mounting groove on the corresponding side, and the other titanium ring abuts between the other side of the magnetic steel and the groove wall of the mounting groove on the corresponding side;

[0007] At least one of the two titanium rings is formed as a wedge-shaped titanium ring, and the width of the cross section of the wedge-shaped titanium ring gradually decreases in a direction pointing toward the axis of the mandrel along the circumference of the mandrel.

[0008] Optionally, a side surface of the wedge-shaped titanium ring close to the groove wall of the mounting groove is formed as a first inclined surface, and the groove wall of the mounting groove on the corresponding side is formed as a second inclined surface, and the first inclined surface and the second inclined surface are abutted and matched.

[0009] Optionally, the wedge-shaped titanium ring includes two semicircular rings, which are arranged correspondingly and together form a circular titanium ring.

[0010] A second aspect of the present application provides an assembly tool, wherein the assembly tool is used to assemble the rotor structure as described in any one of the above items;

[0011] The assembly tool includes a clamping component and two centering components. The clamping component is sleeved on the rotor structure, and the clamping component is at least pressed on the wedge-shaped titanium ring. The two centering components are both sleeved on the rotor structure and are arranged on both sides of the clamping component.

[0012] Optionally, the clamping assembly includes a fixed frame, a moving frame and a pressure plate, and the fixed frame and the moving frame are both sleeved on the rotor structure;

[0013] The fixed frame and the movable frame are both movably connected to the pressure plate. The movable frame can move toward the fixed frame and drive the pressure plate to move toward the rotor structure, and can also move away from the fixed frame and drive the pressure plate to move away from the rotor structure.

[0014] Optionally, the pressure plate is connected to the fixing frame via a first connecting rod, one end of the first connecting rod is rotatably connected to the fixing frame, and the other end of the first connecting rod is rotatably connected to the pressure plate;

[0015] The pressure plate is connected to the moving frame via a second connecting rod, one end of the second connecting rod is rotatably connected to the moving frame, and the other end of the second connecting rod is rotatably connected to the pressure plate;

[0016] One end of the first connecting rod away from the fixed frame is inclined radially close to the rotor structure, and one end of the second connecting rod away from the moving frame is inclined radially close to the rotor structure.

[0017] Optionally, the fixed frame and the moving frame are connected by a connecting rod, and the connecting rod is sequentially inserted into the fixed frame and the moving frame, one of the fixed frame and the moving frame is rotationally matched with the connecting rod, and the other is threadedly matched with the connecting rod.

[0018] Optionally, the centering assembly includes a centering bracket and a plurality of claws arranged on the centering bracket, the centering bracket is sleeved on the rotor structure, the claws are rotatably connected to the centering bracket, and one end of the claw away from the centering bracket is used to abut against the core shaft.

[0019] Optionally, the centering bracket includes a first mounting plate and a second mounting plate, the first mounting plate is rotatably matched with the second mounting plate, and the second mounting plate is connected to the clamping assembly;

[0020] The clamping claw is rotatably arranged on the second mounting plate, a slide groove is provided at a position of the clamping claw avoiding the rotation axis, a plurality of pin shafts are arranged on the first mounting plate, the plurality of pin shafts are correspondingly inserted into the slide grooves on the plurality of clamping claws and slidably cooperate with the slide grooves, and when the first mounting plate rotates, the pin shaft can drive the plurality of clamping claws to rotate synchronously.

[0021] Optionally, a guide block is provided on a side of the second mounting disk facing the first mounting disk, and a guide groove is provided on a side of the first mounting disk facing the second mounting disk, and when the first mounting disk rotates, the guide block slides in cooperation with the guide groove.

[0022] Compared with the prior art, the technical solution provided by the embodiments of the present application has the following advantages:

[0023] The rotor structure provided by the present application includes a core shaft and a magnetic steel sleeved on the core shaft, the surface of the core shaft is recessed to form a mounting groove, and the mounting groove is extended in the circumferential direction, the magnetic steel is arranged in the mounting groove, and titanium rings are arranged at both ends of the magnetic steel in the axial direction, one of the titanium rings abuts between one side of the magnetic steel and the groove wall of the mounting groove on the corresponding side, and the other titanium ring abuts between the other side of the magnetic steel and the groove wall of the mounting groove on the corresponding side, that is, the magnetic steel and the two titanium rings are arranged in the mounting groove, so as to apply a limiting force to the magnetic steel and the two titanium rings through the groove wall of the mounting groove, and at least one of the two titanium rings is formed as a wedge-shaped titanium ring ... In the direction in which the circumference of the core shaft points to the axis of the core shaft, the width of the cross section of the wedge-shaped titanium ring gradually decreases, that is, at least one of the two titanium rings is formed as a wedge-shaped titanium ring, or both titanium rings are formed as wedge-shaped titanium rings. When the wedge-shaped titanium ring abuts between the magnetic steel and the groove wall of the mounting groove, a clamping force in the axial direction can be generated between the wedge-shaped titanium ring and the groove wall of the mounting groove, thereby enhancing the bending stiffness of the rotor structure, improving the critical speed of the rotor structure, and making it have better operating stability. There is no need to increase the diameter of the core shaft, the thickness of the magnetic steel can be guaranteed, the temperature rise is lower, the efficiency of the whole machine is improved, and the risk of thermal demagnetization of the magnetic steel is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0026] Figure 1 A schematic structural diagram of a rotor structure according to an embodiment of the present invention;

[0027] Figure 2 It is a structural schematic diagram of an assembly tool according to an embodiment of the present invention;

[0028] Figure 3 for Figure 2 A partial enlarged view of the middle AA section;

[0029] Figure 4 It is a structural schematic diagram of a clamping assembly according to an embodiment of the present invention;

[0030] Figure 5 A top view of a clamping assembly according to an embodiment of the present invention;

[0031] Figure 6 for Figure 5 Cross-sectional view along the BB direction;

[0032] Figure 7 It is a structural schematic diagram of a centering assembly according to an embodiment of the present invention;

[0033] Figure 8 A front view of a centering assembly according to an embodiment of the present invention;

[0034] Fig. 9 A side view of a centering assembly according to an embodiment of the present invention;

[0035] Fig.10 for Fig. 9 Sectional view along CC direction;

[0036] Fig.11 It is a schematic diagram of the assembly of a centering assembly and a rotor structure according to an embodiment of the present invention;

[0037] Fig.12 It is a schematic diagram of the abutment between the claw and the rotor structure according to an embodiment of the present invention.

[0038] In the figure: 1, rotor structure; 11, core shaft; 12, magnetic steel; 13, titanium ring;

[0039] 2. Clamping assembly; 21. Fixed frame; 22. Moving frame; 221. Movable sleeve; 23. Pressure plate; 24. First connecting rod; 25. Second connecting rod; 26. Connecting rod;

[0040] 3. Centering assembly; 31. Clamping claw; 311. Slide groove; 32. First mounting plate; 321. Pin shaft; 322. Guide groove; 33. Second mounting plate; 331. Guide block. DETAILED DESCRIPTION

[0041] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0042] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0043] The rotor structure and assembly tooling are described in detail below through specific embodiments:

[0044] Reference Figure 1 As shown, some embodiments of the present invention provide a rotor structure 1, including a core shaft 11 and a magnetic steel 12 sleeved on the core shaft 11, the surface of the core shaft 11 is recessed to form a mounting groove, and the mounting groove extends along the circumferential direction, and the magnetic steel 12 is arranged in the mounting groove.

[0045] Among them, titanium rings 13 are provided at both ends of the magnetic steel 12 in the axial direction, one of the titanium rings 13 abuts between one side of the magnetic steel 12 and the groove wall of the corresponding side of the mounting groove, and the other titanium ring 13 abuts between the other side of the magnetic steel 12 and the groove wall of the corresponding side of the mounting groove, that is, the magnetic steel 12 and the two titanium rings 13 are arranged in the mounting groove to apply a limiting force to the magnetic steel 12 and the two titanium rings 13 through the groove wall of the mounting groove.

[0046] In specific implementation, at least one of the two titanium rings 13 is formed as a wedge-shaped titanium ring, and the width of the cross section of the wedge-shaped titanium ring gradually decreases in the direction along the circumference of the core shaft 11 pointing to the axis of the core shaft 11, that is, at least one of the two titanium rings 13 is formed as a wedge-shaped titanium ring, or both titanium rings 13 are formed as wedge-shaped titanium rings.

[0047] It can be understood that when the wedge-shaped titanium ring abuts between the magnet 12 and the groove wall of the mounting groove, a clamping force in the axial direction can be generated between the wedge-shaped titanium ring and the groove wall of the mounting groove, thereby enhancing the bending stiffness of the rotor structure 1, and improving the critical speed of the rotor structure 1, so that it has better operating stability. There is no need to increase the diameter of the core shaft 11, and the thickness of the magnet 12 can be guaranteed, the temperature rise is lower, the efficiency of the whole machine is improved, and the risk of thermal demagnetization of the magnet 12 is reduced.

[0048] Continue to refer to Figure 1As shown, the side surface of the wedge-shaped titanium ring close to the groove wall of the installation groove is formed as a first inclined surface, and the groove wall of the installation groove on the corresponding side is formed as a second inclined surface, and the first inclined surface and the second inclined surface are abutted and matched. It can be understood that the first inclined surface and the second inclined surface are formed as the contact surface between the wedge-shaped titanium ring and the groove wall of the installation groove, which increases the contact area compared to the general contact surface, can ensure that there is enough abutment force between the first inclined surface and the second inclined surface, and thus can ensure the bending stiffness of the rotor structure 1.

[0049] In some embodiments, the wedge-shaped titanium ring includes two semicircular rings, which are arranged correspondingly and are assembled together to form a circular titanium ring for easy installation. In specific implementation, the two semicircular rings are pressed in the direction of the axis of the mandrel 11 along the circumference of the mandrel 11, and according to the characteristics of the wedge-shaped structure, the side of the wedge-shaped titanium ring and the side wall of the installation groove can be tightly combined, which is more labor-saving during installation. At the same time, through the abutment between the two, the wedge-shaped titanium ring can be limited between the magnetic steel 12 and the groove wall of the installation groove.

[0050] Reference Figures 2 to 12 As shown, some other embodiments of the present application provide an assembly tool, which is used to assemble the rotor structure 1 as any of the above embodiments.

[0051] Specifically, refer to Figure 2 As shown, the assembly tool includes a clamping component 2 and two centering components 3. The clamping component 2 is sleeved on the rotor structure 1, and the clamping component 2 is at least pressed on the wedge-shaped titanium ring, so that the wedge-shaped titanium ring is pressed between the magnetic steel 12 and the groove wall of the installation groove through the clamping component 2. The two centering components 3 are both sleeved on the rotor structure 1 and are arranged on both sides of the clamping component 2, that is, the centering component 3, the clamping component 2 and the centering component 3 are arranged in sequence, and the rotor structure 1 can be penetrated therein and fixed by the two centering components 3, so that it is convenient for the clamping component 2 to assemble the wedge-shaped titanium ring, which can improve the assembly accuracy and efficiency and reduce the difficulty of assembly.

[0052] In some embodiments, reference Figures 4 to 6 As shown, the clamping assembly 2 includes a fixed frame 21 , a moving frame 22 and a pressure plate 23 , and both the fixed frame 21 and the moving frame 22 are sleeved on the rotor structure 1 .

[0053] Specifically, the fixed frame 21 and the movable frame 22 are both movably connected to the pressure plate 23. The movable frame 22 can move toward the fixed frame 21 and drive the pressure plate 23 to move toward the rotor structure 1, so that the pressure plate 23 can be pressed on the wedge-shaped titanium ring and press the wedge-shaped titanium ring into between the magnet 12 and the groove wall of the installation groove. The movable frame 22 can also move away from the fixed frame 21 and drive the pressure plate 23 to move away from the rotor structure 1, so that the pressure plate 23 can be released from the abutment with the wedge-shaped titanium ring, so that the rotor structure 1 can be detached from the clamping assembly 2. After the wedge-shaped titanium ring is installed, the abutment force between the wedge-shaped titanium ring, the magnet 12 and the groove wall of the installation groove can ensure stable installation among the three.

[0054] When implementing it, refer to Figure 4 As shown, the pressure plate 23 is connected to the fixed frame 21 through the first connecting rod 24, one end of the first connecting rod 24 is rotatably connected to the fixed frame 21, and the other end is rotatably connected to the pressure plate 23; the pressure plate 23 is connected to the movable frame 22 through the second connecting rod 25, one end of the second connecting rod 25 is rotatably connected to the movable frame 22, and the other end is rotatably connected to the pressure plate 23, so that the pressure plate 23 can move relative to the fixed frame 21 and the movable frame 22 at the same time.

[0055] One end of the first connecting rod 24 away from the fixed frame 21 is tilted radially close to the rotor structure 1, and one end of the second connecting rod 25 away from the moving frame 22 is tilted radially close to the rotor structure 1. With such a configuration, when the moving frame 22 moves toward the fixed frame 21, one end of the first connecting rod 24 away from the fixed frame 21 and one end of the second connecting rod 25 away from the moving frame 22 can further tilt radially close to the rotor structure 1, thereby driving the pressure plate 23 to move toward the rotor structure 1; when the moving frame 22 moves away from the fixed frame 21, one end of the first connecting rod 24 away from the fixed frame 21 and one end of the second connecting rod 25 away from the moving frame 22 can further reset radially away from the rotor structure 1, thereby driving the pressure plate 23 to move away from the rotor structure 1.

[0056] Reference Figure 5 As shown, the number of the first connecting rod 24 and the second connecting rod 25 are both multiple, and the multiple first connecting rods 24 and the second connecting rods 25 can all apply pressure to the pressure plate 23, thereby increasing the clamping force of the pressure plate 23 during installation and improving the assembly efficiency. At the same time, the multiple positions of the pressure plate 23 connected to the first connecting rod 24 and the second connecting rod 25 can withstand the acting force, which can make the pressure plate 23 evenly stressed and extend its service life.

[0057] In some embodiments, the fixed frame 21 and the moving frame 22 are connected by a connecting rod 26, and the connecting rod 26 is sequentially inserted into the fixed frame 21 and the moving frame 22, one of the fixed frame 21 and the moving frame 22 is rotationally matched with the connecting rod 26, and the other is threadedly matched with the connecting rod 26.

[0058] It can be understood that the fixed frame 21 is fixed relative to the rotor structure 1. When the fixed frame 21 is rotationally matched with the connecting rod 26 and the moving frame 22 is threadedly matched with the connecting rod 26, the moving frame 22 can move relative to the connecting rod 26 by rotating the connecting rod 26 to get closer to or farther away from the fixed frame 21; when the fixed frame 21 is threadedly matched with the connecting rod 26 and the moving frame 22 is rotationally matched with the connecting rod 26, the connecting rod 26 can move relative to the fixed frame 21 by rotating the connecting rod 26, and then the moving frame 22 can be driven by the connecting rod 26 to get closer to or farther away from the fixed frame 21. Specifically, the pressure plate 23 can be kept with sufficient downward pressure by the threaded self-locking between the connecting rod 26 and the other of the fixed frame 21 and the moving frame 22.

[0059] Of course, the fixed frame 21 and the moving frame 22 can also be connected in other ways, such as an electric push rod or other structures, as long as it can drive the moving frame 22 to move relative to the fixed frame 21, and then drive the pressure plate 23 to move toward or away from the rotor structure 1, it can be specifically set according to actual conditions.

[0060] It should be noted that a plurality of pressure plates 23 may be arranged between the fixed frame 21 and the movable frame 22, and a plurality of groups of first connecting rods 24 and second connecting rods 25 may be arranged correspondingly. The present application does not impose any restriction on this. As long as the center lines of the plurality of pressure plates 23 coincide and they can be arranged correspondingly around the outer periphery of the rotor structure 1, with such an arrangement, pressure may be applied to the rotor structure 1 at multiple points to complete the assembly. Specifically, the pressure plate 23 is an arc-shaped plate adapted to the outer peripheral surface of the rotor structure 1 so that the wedge-shaped titanium ring can be subjected to uniform force during assembly.

[0061] When assembling the rotor structure 1, the magnet 12 and another titanium ring 13 other than the wedge-shaped titanium ring can be assembled first. The space of the installation groove is larger, and the installation is more labor-saving. Finally, the wedge-shaped titanium ring is pressed between the magnet 12 and the groove wall of the installation groove through the clamping assembly 2. Finally, the abutment force between the wedge-shaped titanium ring, the magnet 12 and the groove wall of the installation groove can ensure the stable installation of the rotor structure 1.

[0062] In some embodiments, reference Figures 7 to 12 As shown, the centering assembly 3 includes a centering bracket and a plurality of claws 31 arranged on the centering bracket. The centering bracket is sleeved on the rotor structure 1. The claws 31 are rotatably connected to the centering bracket. The end of the claw 31 away from the centering bracket is used to abut against the core shaft 11 to clamp the rotor structure 1, so as to facilitate the assembly of the wedge-shaped titanium ring by the clamping mechanism.

[0063] Specifically, the centering bracket includes a first mounting plate 32 and a second mounting plate 33. The first mounting plate 32 and the second mounting plate 33 are rotatably matched. The second mounting plate 33 is connected to the clamping assembly 2, that is, the second mounting plate 33 is relatively fixed, and the first mounting plate 32 can rotate relative to the second mounting plate 33.

[0064] Reference Fig.10 As shown, the claw 31 is rotatably arranged on the second mounting plate 33, and a slide groove 311 is opened at a position of the claw 31 avoiding the rotation axis. A plurality of pins 321 are arranged on the first mounting plate 32. The plurality of pins 321 are correspondingly inserted into the slide grooves 311 on the plurality of claws 31 and slidably cooperate with the slide grooves 311. When the first mounting plate 32 rotates, the pins 321 can drive the plurality of claws 31 to rotate synchronously. During the rotation of the claw 31, the centering clamping of the core shafts 11 of different diameters can be achieved.

[0065] That is to say, the plurality of claws 31 can rotate in conjunction to clamp the rotor structure 1, and the rotor structure 1 can be located at the center of the centering assembly 3, and then the rotor structure 1 is fixed by the two centering assemblies 3, thereby facilitating the assembly of the wedge-shaped titanium ring by the clamping assembly 2.

[0066] In some embodiments, reference Figure 3 As shown, a guide block 331 is provided on the side of the second mounting disk 33 facing the first mounting disk 32, and a guide groove 322 is provided on the side of the first mounting disk 32 facing the second mounting disk 33. When the first mounting disk 32 rotates, the guide block 331 slides with the guide groove 322 to ensure the stability of the first mounting disk 32 when rotating relative to the second mounting disk 33.

[0067] When implementing it, refer to Figure 2 As shown, the fixed frame 21 of the clamping assembly 2 can serve as a relatively fixed second mounting plate 33 in the centering assembly 3, that is, the two form a structural member, thereby being able to complete the connection between the clamping assembly 2 and one of the centering assemblies 3, and the movable frame 22 of the clamping assembly 2 can be movably connected with the relatively fixed second mounting plate 33 in the other centering assembly 3, so as to ensure that the movable frame 22 can move while completing the connection between the clamping assembly 2 and the other centering assembly 3.

[0068] Specifically, refer to Figure 6 As shown, a movable sleeve 221 is provided on the side of the moving frame 22 facing the second mounting plate 33, and a movable groove is opened on the second mounting plate 33. The movable sleeve 221 is inserted into the moving frame 22 and slidably cooperates with the movable groove, thereby realizing a sliding connection between the moving frame 22 and the second mounting plate 33.

[0069] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0070] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rotor structure, characterized in that: It comprises a core shaft (11) and a magnetic steel (12) sleeved on the core shaft (11), the surface of the core shaft (11) is recessed to form a mounting groove, and the mounting groove is extended in a circumferential direction, and the magnetic steel (12) is arranged in the mounting groove; Titanium rings (13) are provided at both ends of the magnetic steel (12) in the axial direction, wherein one of the titanium rings (13) abuts between one side of the magnetic steel (12) and the groove wall of the mounting groove on the corresponding side, and the other titanium ring (13) abuts between the other side of the magnetic steel (12) and the groove wall of the mounting groove on the corresponding side; At least one of the two titanium rings (13) is formed as a wedge-shaped titanium ring, and the width of the cross section of the wedge-shaped titanium ring gradually decreases in a direction pointing toward the axis of the core shaft (11) along the circumference of the core shaft (11).

2. The rotor structure according to claim 1, characterized in that: A side surface of the wedge-shaped titanium ring close to the groove wall of the installation groove is formed as a first inclined surface, and the groove wall of the installation groove on the corresponding side is formed as a second inclined surface, and the first inclined surface and the second inclined surface are abutted and matched.

3. The rotor structure according to claim 1, characterized in that: The wedge-shaped titanium ring includes two semicircular rings, which are arranged correspondingly and are assembled together to form a circular titanium ring.

4. An assembly tool, characterized in that: The assembly tool is used to assemble the rotor structure (1) according to any one of claims 1 to 3; The assembly tool comprises a clamping component (2) and two centering components (3); the clamping component (2) is sleeved on the rotor structure (1), and the clamping component (2) is at least pressed on the wedge-shaped titanium ring; the two centering components (3) are both sleeved on the rotor structure (1) and are arranged on both sides of the clamping component (2).

5. The assembly tool according to claim 4, characterized in that: The clamping assembly (2) comprises a fixed frame (21), a moving frame (22) and a pressure plate (23), wherein the fixed frame (21) and the moving frame (22) are both sleeved on the rotor structure (1); The fixed frame (21) and the movable frame (22) are both movably connected to the pressure plate (23); the movable frame (22) can move toward the fixed frame (21) and drive the pressure plate (23) to move toward the rotor structure (1), and can also move away from the fixed frame (21) and drive the pressure plate (23) to move away from the rotor structure (1).

6. The assembly tool according to claim 5, characterized in that: The pressure plate (23) is connected to the fixed frame (21) via a first connecting rod (24); one end of the first connecting rod (24) is rotatably connected to the fixed frame (21), and the other end of the first connecting rod (24) is rotatably connected to the pressure plate (23); The pressure plate (23) is connected to the moving frame (22) via a second connecting rod (25), one end of the second connecting rod (25) is rotatably connected to the moving frame (22), and the other end of the second connecting rod (25) is rotatably connected to the pressure plate (23); One end of the first connecting rod (24) away from the fixed frame (21) is inclined radially toward the rotor structure (1), and one end of the second connecting rod (25) away from the moving frame (22) is inclined radially toward the rotor structure (1).

7. The assembly tool according to claim 6, characterized in that: The fixed frame (21) and the movable frame (22) are connected via a connecting rod (26), and the connecting rod (26) is sequentially inserted into the fixed frame (21) and the movable frame (22), and one of the fixed frame (21) and the movable frame (22) is rotationally engaged with the connecting rod (26), and the other is threadedly engaged with the connecting rod (26).

8. The assembly tool according to claim 4, characterized in that: The centering assembly (3) comprises a centering bracket and a plurality of claws (31) arranged on the centering bracket, the centering bracket is sleeved on the rotor structure (1), the claws (31) and the centering bracket are rotatably connected, and one end of the claw (31) away from the centering bracket is used to abut against the core shaft (11).

9. The assembly tool according to claim 8, characterized in that: The centering bracket comprises a first mounting plate (32) and a second mounting plate (33), the first mounting plate (32) and the second mounting plate (33) are rotatably matched, and the second mounting plate (33) is connected to the clamping assembly (2); The clamping claw (31) is rotatably arranged on the second mounting plate (33); a slide groove (311) is provided at a position of the clamping claw (31) avoiding the rotation axis; a plurality of pin shafts (321) are provided on the first mounting plate (32); the plurality of pin shafts (321) are correspondingly inserted into the slide grooves (311) on the plurality of clamping claws (31) and slidably cooperate with the slide grooves (311); when the first mounting plate (32) rotates, the pin shaft (321) can drive the plurality of clamping claws (31) to rotate synchronously.

10. The assembly tool according to claim 9, characterized in that: A guide block (331) is provided on a side of the second mounting plate (33) facing the first mounting plate (32), and a guide groove (322) is provided on a side of the first mounting plate (32) facing the second mounting plate (33); when the first mounting plate (32) rotates, the guide block (331) and the guide groove (322) are slidably matched.

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